From 358da97e4e90811bbfbe26d60f142e7ebc9a2244 Mon Sep 17 00:00:00 2001 From: Hari Sandanagobalane Date: Wed, 3 Sep 2008 12:10:49 +0000 Subject: Add picoChip port. 2008-09-03 Hari Sandanagobalane Add picoChip port. * MAINTAINERS: Add picoChip maintainers. libgcc/ * config.host: Add picochip-*-*. gcc/ * doc/extend.texi: Document picoChip builtin functions. * doc/invoke.texi: Document picoChip options. * doc/contrib.texi: Add picoChip contribution. * doc/md.texi: Document picoChip constraints. * config.gcc: Add picochip-*-*. * config/picochip/: Add new port. From-SVN: r139932 --- config/picochip/constraints.md | 68 + config/picochip/dfa_space.md | 43 + config/picochip/dfa_speed.md | 123 + config/picochip/libgccExtras/adddi3.asm | 199 ++ config/picochip/libgccExtras/ashlsi3.asm | 197 ++ config/picochip/libgccExtras/ashlsi3.c | 87 + config/picochip/libgccExtras/ashrsi3.asm | 207 ++ config/picochip/libgccExtras/ashrsi3.c | 118 + config/picochip/libgccExtras/clzsi2.asm | 166 + config/picochip/libgccExtras/cmpsi2.asm | 217 ++ config/picochip/libgccExtras/divmod15.asm | 268 ++ config/picochip/libgccExtras/divmodhi4.asm | 251 ++ config/picochip/libgccExtras/divmodsi4.asm | 239 ++ config/picochip/libgccExtras/fake_libgcc.asm | 6 + config/picochip/libgccExtras/longjmp.asm | 187 ++ config/picochip/libgccExtras/lshrsi3.asm | 195 ++ config/picochip/libgccExtras/lshrsi3.c | 81 + config/picochip/libgccExtras/parityhi2.asm | 184 ++ config/picochip/libgccExtras/popcounthi2.asm | 206 ++ config/picochip/libgccExtras/setjmp.asm | 187 ++ config/picochip/libgccExtras/subdi3.asm | 196 ++ config/picochip/libgccExtras/ucmpsi2.asm | 214 ++ config/picochip/libgccExtras/udivmodhi4.asm | 243 ++ config/picochip/libgccExtras/udivmodsi4.asm | 323 ++ config/picochip/picochip-protos.h | 140 + config/picochip/picochip.c | 4421 ++++++++++++++++++++++++++ config/picochip/picochip.h | 749 +++++ config/picochip/picochip.md | 2699 ++++++++++++++++ config/picochip/picochip.opt | 48 + config/picochip/predicates.md | 72 + config/picochip/t-picochip | 62 + 31 files changed, 12396 insertions(+) create mode 100644 config/picochip/constraints.md create mode 100644 config/picochip/dfa_space.md create mode 100644 config/picochip/dfa_speed.md create mode 100644 config/picochip/libgccExtras/adddi3.asm create mode 100644 config/picochip/libgccExtras/ashlsi3.asm create mode 100644 config/picochip/libgccExtras/ashlsi3.c create mode 100644 config/picochip/libgccExtras/ashrsi3.asm create mode 100644 config/picochip/libgccExtras/ashrsi3.c create mode 100644 config/picochip/libgccExtras/clzsi2.asm create mode 100644 config/picochip/libgccExtras/cmpsi2.asm create mode 100644 config/picochip/libgccExtras/divmod15.asm create mode 100644 config/picochip/libgccExtras/divmodhi4.asm create mode 100644 config/picochip/libgccExtras/divmodsi4.asm create mode 100644 config/picochip/libgccExtras/fake_libgcc.asm create mode 100644 config/picochip/libgccExtras/longjmp.asm create mode 100644 config/picochip/libgccExtras/lshrsi3.asm create mode 100644 config/picochip/libgccExtras/lshrsi3.c create mode 100644 config/picochip/libgccExtras/parityhi2.asm create mode 100644 config/picochip/libgccExtras/popcounthi2.asm create mode 100644 config/picochip/libgccExtras/setjmp.asm create mode 100644 config/picochip/libgccExtras/subdi3.asm create mode 100644 config/picochip/libgccExtras/ucmpsi2.asm create mode 100644 config/picochip/libgccExtras/udivmodhi4.asm create mode 100644 config/picochip/libgccExtras/udivmodsi4.asm create mode 100644 config/picochip/picochip-protos.h create mode 100644 config/picochip/picochip.c create mode 100644 config/picochip/picochip.h create mode 100644 config/picochip/picochip.md create mode 100644 config/picochip/picochip.opt create mode 100644 config/picochip/predicates.md create mode 100644 config/picochip/t-picochip (limited to 'config') diff --git a/config/picochip/constraints.md b/config/picochip/constraints.md new file mode 100644 index 0000000..2b100b6 --- /dev/null +++ b/config/picochip/constraints.md @@ -0,0 +1,68 @@ +;; GCC machine description for picochip +;; Copyright (C) 2008 Free Software Foundation, Inc. +;; Contributed by picoChip Designs Ltd (http://www.picochip.com) +;; Maintained by Daniel Towner (dant@picochip.com) and Hariharan +;; Sandanagobalane (hariharan@picochip.com) +;; +;; This file is part of GCC. +;; +;; GCC is free software; you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation; either version 3, or (at your option) +;; any later version. +;; +;; GCC is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. +;; +;; You should have received a copy of the GNU General Public License +;; along with GCC; see the file COPYING3. If not, see +;; . + +(define_constraint "I" + "4-bits signed value" + (and (match_code "const_int") + (match_test " ival >= -8 && ival< 8"))) + +(define_constraint "J" + "4-bits unsigned value" + (and (match_code "const_int") + (match_test "ival>=0 && ival < 16"))) + +(define_constraint "K" + "8-bits signed value" + (and (match_code "const_int") + (match_test " ival >= -128 && ival < 128"))) + +(define_constraint "M" + "4-bits magnitude" + (and (match_code "const_int") + (match_test " abs(ival) < 16"))) + +(define_constraint "N" + "10-bits signed value" + (and (match_code "const_int") + (match_test "ival >= -512 && ival < 512"))) + +(define_constraint "O" + "16-bits signed value" + (and (match_code "const_int") + (match_test " ival >= -32768 && ival < 32768 "))) + +(define_constraint "a" + "See if this is an absolute address in memory" + (and (match_code "mem") + (match_test "picochip_absolute_memory_operand(op,mode) == 1"))) + +(define_constraint "b" + "See if this is an address in memory, non-strict version" + (match_test "picochip_legitimate_address_p(mode,op,0) == 1")) + +(define_register_constraint "k" "FRAME_REGS" + "Frame regs") +(define_register_constraint "f" "PTR_REGS" + "Pointer regs") +(define_register_constraint "t" "TWIN_REGS" + "Twin regs") + diff --git a/config/picochip/dfa_space.md b/config/picochip/dfa_space.md new file mode 100644 index 0000000..9a6d8c2 --- /dev/null +++ b/config/picochip/dfa_space.md @@ -0,0 +1,43 @@ +;; GCC machine description for picochip +;; Copyright (C) 2008 Free Software Foundation, Inc. +;; Contributed by picoChip Designs Ltd (http://www.picochip.com) +;; Maintained by Daniel Towner (dant@picochip.com) and Hariharan +;; Sandanagobalane (hariharan@picochip.com) +;; +;; This file is part of GCC. +;; +;; GCC is free software; you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation; either version 3, or (at your option) +;; any later version. +;; +;; GCC is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. +;; +;; You should have received a copy of the GNU General Public License +;; along with GCC; see the file COPYING3. If not, see +;; . + +;; The following DFA description schedules instructions for space. The +;; schedule seeks to avoid stall cycles (e.g., memory load), but the +;; instructions are not VLIW packed (whenever instructions are packed +;; together, an additional byte is used to denote this, which +;; increases the code size). + +;; No special handling of the long constants is necessary (as in +;; dfa_speed.md), since VLIW packing is not used. + +;; Memory instructions stall for one cycle. All other instructions +;; complete ready for the next cycle. + +(define_insn_reservation "nonStallInsn" 1 + (and (eq_attr "schedType" "space") + (eq_attr "type" "!mem")) + "slot0+slot1+slot2") + +(define_insn_reservation "stallInsn" 2 + (and (eq_attr "schedType" "space") + (eq_attr "type" "mem")) + "slot0+slot1+slot2") diff --git a/config/picochip/dfa_speed.md b/config/picochip/dfa_speed.md new file mode 100644 index 0000000..6f2f756 --- /dev/null +++ b/config/picochip/dfa_speed.md @@ -0,0 +1,123 @@ +;; GCC machine description for picochip +;; Copyright (C) 2008 Free Software Foundation, Inc. +;; Contributed by picoChip Designs Ltd (http://www.picochip.com) +;; Maintained by Daniel Towner (dant@picochip.com) and Hariharan +;; Sandanagobalane (hariharan@picochip.com). +;; +;; This file is part of GCC. +;; +;; GCC is free software; you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation; either version 3, or (at your option) +;; any later version. +;; +;; GCC is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. +;; +;; You should have received a copy of the GNU General Public License +;; along with GCC; see the file COPYING3. If not, see +;; . + +;; The following DFA description schedules instructions for speed. In +;; addition to the scheduling of instructions to remove stall cycles +;; (e.g., memory load), the scheduler will also pack multiple +;; instructions into a single cycle, using VLIW. + +;; Each instruction comes in forms with and without long +;; constants. The long constant is treated as though it were also an +;; instruction. Thus, an instruction which used slot0, will use slot0 +;; plus one of the other slots for the constant. This mechanism +;; ensures that it is impossible for 3 instructions to be issued, if +;; one of them has a long constant. This is necessary, because the +;; encoding of 3 instructions, plus a constant, will overrun the +;; 64-bit limit. + +; Extended ALU - Slot 0 +(define_insn_reservation "picoAluInsn" 1 + (and (eq_attr "schedType" "speed") + (and (eq_attr "type" "picoAlu") (eq_attr "longConstant" "false"))) + "slot0") +(define_insn_reservation "picoAluInsnWithConst" 1 + (and (eq_attr "schedType" "speed") + (and (eq_attr "type" "picoAlu") (eq_attr "longConstant" "true"))) + "(slot0+slot1)|(slot0+slot2)") + +; Basic ALU - Slot 0 or 1 +(define_insn_reservation "basicAluInsn" 1 + (and (eq_attr "schedType" "speed") + (and (eq_attr "type" "basicAlu") (eq_attr "longConstant" "false"))) + "(slot0|slot1)") +(define_insn_reservation "basicAluInsnWithConst" 1 + (and (eq_attr "schedType" "speed") + (and (eq_attr "type" "basicAlu") (eq_attr "longConstant" "true"))) + "(slot0+slot1) | (slot1+slot2) | (slot0+slot2)") + +; ALU which must not set flags - Slot 1 +(define_insn_reservation "nonCcAluInsn" 1 + (and (eq_attr "schedType" "speed") + (and (eq_attr "type" "nonCcAlu") (eq_attr "longConstant" "false"))) + "slot1") +(define_insn_reservation "nonCcAluInsnWithConst" 1 + (and (eq_attr "schedType" "speed") + (and (eq_attr "type" "nonCcAlu") (eq_attr "longConstant" "true"))) + "(slot1+slot0) | (slot1+slot2)") + +; Memory - Slot 1 +(define_insn_reservation "memInsn" 2 + (and (eq_attr "schedType" "speed") + (and (eq_attr "type" "mem") (eq_attr "longConstant" "false"))) + "slot1,nothing") +(define_insn_reservation "memInsnWithConst" 2 + (and (eq_attr "schedType" "speed") + (and (eq_attr "type" "mem") (eq_attr "longConstant" "true"))) + "slot1+(slot0|slot2),nothing") + +; Multiply - Slot 2 +(define_insn_reservation "mulInsn" 1 + (and (eq_attr "schedType" "speed") + (and (eq_attr "type" "mul") (eq_attr "longConstant" "false"))) + "slot2") +(define_insn_reservation "mulInsnWithConst" 1 + (and (eq_attr "schedType" "speed") + (and (eq_attr "type" "mul") (eq_attr "longConstant" "true"))) + "(slot2+slot0)|(slot2+slot1)") + +; MAC - Slot 2 +(define_insn_reservation "macInsn" 1 + (and (eq_attr "schedType" "speed") + (and (eq_attr "type" "mac") (eq_attr "longConstant" "false"))) + "slot2") +(define_insn_reservation "macInsnWithConst" 1 + (and (eq_attr "schedType" "speed") + (and (eq_attr "type" "mac") (eq_attr "longConstant" "true"))) + "(slot2+slot0)|(slot2+slot1)") + +; Branch - Real branches use slot2, while macro branches use unknown +; resources. +(define_insn_reservation "branchInsn" 1 + (and (eq_attr "schedType" "speed") + (and (eq_attr "type" "realBranch") (eq_attr "longConstant" "false"))) + "slot2") +(define_insn_reservation "branchInsnWithConst" 1 + (and (eq_attr "schedType" "speed") + (and (eq_attr "type" "realBranch") (eq_attr "longConstant" "true"))) + "(slot2+slot0)|(slot2+slot1)") +(define_insn_reservation "branchInsnMacro" 1 + (and (eq_attr "schedType" "speed") + (eq_attr "type" "realBranch")) + "(slot0+slot1+slot2)") + +; Call instructions use all slots to prevent inadvertent scheduling +; alongside instructions which set R12. + +(define_insn_reservation "callInsn" 1 + (and (eq_attr "schedType" "speed") (eq_attr "type" "call")) + "slot0+slot1+slot2") + +; Communications - Slot 1 +(define_insn_reservation "commsInsn" 1 + (and (eq_attr "schedType" "speed") (eq_attr "type" "comms")) + "slot1") + diff --git a/config/picochip/libgccExtras/adddi3.asm b/config/picochip/libgccExtras/adddi3.asm new file mode 100644 index 0000000..99fb693 --- /dev/null +++ b/config/picochip/libgccExtras/adddi3.asm @@ -0,0 +1,199 @@ +// picoChip ASM file +// +// Support for 64-bit addition. +// +// Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. +// Contributed by picoChip Designs Ltd. +// Maintained by Hariharan Sandanagobalane (hariharan@picochip.com) +// +// This file is free software; you can redistribute it and/or modify it +// under the terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) any +// later version. +// +// In addition to the permissions in the GNU General Public License, the +// Free Software Foundation gives you unlimited permission to link the +// compiled version of this file into combinations with other programs, +// and to distribute those combinations without any restriction coming +// from the use of this file. (The General Public License restrictions +// do apply in other respects; for example, they cover modification of +// the file, and distribution when not linked into a combine +// executable.) +// +// This file is distributed in the hope that it will be useful, but +// WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; see the file COPYING. If not, write to +// the Free Software Foundation, 51 Franklin Street, Fifth Floor, +// Boston, MA 02110-1301, USA. + +.section .text + +.align 8 +.global __adddi3 +__adddi3: +_picoMark_FUNCTION_BEGIN= + +// picoChip Function Prologue : &__adddi3 = 12 bytes + + // The first operand of add is completely in registers r[2-5] + // The second operand of sub is in stack FP(0-3) + // and result need to be written pointed to by the register r0. + // All we need to do is to load the appropriate values, add them + // appropriately (with add or addc ) and then store the values back. + + ldw (FP)0, r1 + stl r[7:6], (FP)-1 + add.0 r2, r1, r6 + ldw (FP)1, r1 + addc.0 r3, r1, r7 + ldl (FP)1, r[3:2] + stl r[7:6], (r0)0 + addc.0 r4, r2, r6 + addc.0 r5, r3, r7 + stl r[7:6], (r0)1 + jr (r12) +=-> ldl (FP)-1, r[7:6] + +_picoMark_FUNCTION_END= + +// picoChip Function Epilogue : __adddi3 + + +//============================================================================ +// All DWARF information between this marker, and the END OF DWARF +// marker should be included in the source file. Search for +// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and +// provide the relevent information. Add markers called +// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the +// function in question. +//============================================================================ + +//============================================================================ +// Frame information. +//============================================================================ + +.section .debug_frame +_picoMark_DebugFrame= + +// Common CIE header. +.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin +_picoMark_CieBegin= +.unalignedInitLong 0xffffffff +.initByte 0x1 // CIE Version +.ascii 16#0# // CIE Augmentation +.uleb128 0x1 // CIE Code Alignment Factor +.sleb128 2 // CIE Data Alignment Factor +.initByte 0xc // CIE RA Column +.initByte 0xc // DW_CFA_def_cfa +.uleb128 0xd +.uleb128 0x0 +.align 2 +_picoMark_CieEnd= + +// FDE +_picoMark_LSFDE0I900821033007563= +.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin +_picoMark_FdeBegin= +.unalignedInitLong _picoMark_DebugFrame // FDE CIE offset +.unalignedInitWord _picoMark_FUNCTION_BEGIN // FDE initial location +.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0xe // <-- FUNCTION_STACK_SIZE_GOES_HERE +.initByte 0x4 // DW_CFA_advance_loc4 +.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 +.align 2 +_picoMark_FdeEnd= + +//============================================================================ +// Abbrevation information. +//============================================================================ + +.section .debug_abbrev +_picoMark_ABBREVIATIONS= + +.section .debug_abbrev + .uleb128 0x1 // (abbrev code) + .uleb128 0x11 // (TAG: DW_TAG_compile_unit) + .initByte 0x1 // DW_children_yes + .uleb128 0x10 // (DW_AT_stmt_list) + .uleb128 0x6 // (DW_FORM_data4) + .uleb128 0x12 // (DW_AT_high_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x11 // (DW_AT_low_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x25 // (DW_AT_producer) + .uleb128 0x8 // (DW_FORM_string) + .uleb128 0x13 // (DW_AT_language) + .uleb128 0x5 // (DW_FORM_data2) + .uleb128 0x3 // (DW_AT_name) + .uleb128 0x8 // (DW_FORM_string) +.initByte 0x0 +.initByte 0x0 + + .uleb128 0x2 ;# (abbrev code) + .uleb128 0x2e ;# (TAG: DW_TAG_subprogram) +.initByte 0x0 ;# DW_children_no + .uleb128 0x3 ;# (DW_AT_name) + .uleb128 0x8 ;# (DW_FORM_string) + .uleb128 0x11 ;# (DW_AT_low_pc) + .uleb128 0x1 ;# (DW_FORM_addr) + .uleb128 0x12 ;# (DW_AT_high_pc) + .uleb128 0x1 ;# (DW_FORM_addr) +.initByte 0x0 +.initByte 0x0 + +.initByte 0x0 + +//============================================================================ +// Line information. DwarfLib requires this to be present, but it can +// be empty. +//============================================================================ + +.section .debug_line +_picoMark_LINES= + +//============================================================================ +// Debug Information +//============================================================================ +.section .debug_info + +//Fixed header. +.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN +_picoMark_DEBUG_INFO_BEGIN= +.unalignedInitWord 0x2 +.unalignedInitLong _picoMark_ABBREVIATIONS +.initByte 0x2 + +// Compile unit information. +.uleb128 0x1 // (DIE 0xb) DW_TAG_compile_unit) +.unalignedInitLong _picoMark_LINES +.unalignedInitWord _picoMark_FUNCTION_END +.unalignedInitWord _picoMark_FUNCTION_BEGIN +// Producer is `picoChip' +.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00# +.unalignedInitWord 0xcafe // ASM language +.ascii 16#0# // Name. DwarfLib expects this to be present. + +.uleb128 0x2 ;# (DIE DW_TAG_subprogram) + +// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex +// digit is specified using the format 16#XX# +.ascii 16#5f# 16#61# 16#64# 16#64# 16#63# 16#69# 16#33# 16#0# // Function name `_adddi3' +.unalignedInitWord _picoMark_FUNCTION_BEGIN // DW_AT_low_pc +.unalignedInitWord _picoMark_FUNCTION_END // DW_AT_high_pc + +.initByte 0x0 // end of compile unit children. + +_picoMark_DEBUG_INFO_END= + +//============================================================================ +// END OF DWARF +//============================================================================ + +.section .endFile diff --git a/config/picochip/libgccExtras/ashlsi3.asm b/config/picochip/libgccExtras/ashlsi3.asm new file mode 100644 index 0000000..413ae50 --- /dev/null +++ b/config/picochip/libgccExtras/ashlsi3.asm @@ -0,0 +1,197 @@ +// picoChip ASM file +// picoChip ASM file +// +// Support for 32-bit arithmetic shift left. +// +// Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. +// Contributed by picoChip Designs Ltd. +// Maintained by Hariharan Sandanagobalane (hariharan@picochip.com) +// +// This file is free software; you can redistribute it and/or modify it +// under the terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) any +// later version. +// +// In addition to the permissions in the GNU General Public License, the +// Free Software Foundation gives you unlimited permission to link the +// compiled version of this file into combinations with other programs, +// and to distribute those combinations without any restriction coming +// from the use of this file. (The General Public License restrictions +// do apply in other respects; for example, they cover modification of +// the file, and distribution when not linked into a combine +// executable.) +// +// This file is distributed in the hope that it will be useful, but +// WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; see the file COPYING. If not, write to +// the Free Software Foundation, 51 Franklin Street, Fifth Floor, +// Boston, MA 02110-1301, USA. +.section .text + +.global ___ashlsi3 +___ashlsi3: +_picoMark_FUNCTION_BEGIN= +// picoChip Function Prologue : &___ashlsi3 = 0 bytes + + // if (R2 > 15) goto _L2 + SUB.0 15,R2,r15 + JMPLT _L2 +=-> SUB.0 16,R2,R5 // R5 := R5 - R4 (HI) + + LSL.0 R1,R2,R1 // R3 := R1 << R2 + LSL.0 R0,R2,R4 // R2 := R0 << R2 + + LSR.0 R0,R5,R5 // R5 := R12 >> R5 NEED TO CHECK - HARI + OR.0 R5,R1,R5 // R3 := R5 IOR R0 (HI) + SUB.0 R2,0,r15 + COPYNE R5,R1 + JR (R12) // Return to caller +=-> COPY.0 R4,R0 + +_L2: + LSL.0 R0,R2,R1 // R3 := R0 << R2 + JR (R12) // Return to caller +=-> COPY.0 0,R0 // R2 := 0 (short constant) + +_picoMark_FUNCTION_END= + +// picoChip Function Epilogue : __ashlsi3 + +//============================================================================ +// All DWARF information between this marker, and the END OF DWARF +// marker should be included in the source file. Search for +// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and +// provide the relevent information. Add markers called +// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the +// function in question. +//============================================================================ + +//============================================================================ +// Frame information. +//============================================================================ + +.section .debug_frame +_picoMark_DebugFrame= + +// Common CIE header. +.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin +_picoMark_CieBegin= +.unalignedInitLong 0xffffffff +.initByte 0x1 // CIE Version +.ascii 16#0# // CIE Augmentation +.uleb128 0x1 // CIE Code Alignment Factor +.sleb128 2 // CIE Data Alignment Factor +.initByte 0xc // CIE RA Column +.initByte 0xc // DW_CFA_def_cfa +.uleb128 0xd +.uleb128 0x0 +.align 2 +_picoMark_CieEnd= + +// FDE +_picoMark_LSFDE0I900821033007563= +.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin +_picoMark_FdeBegin= +.unalignedInitLong _picoMark_DebugFrame // FDE CIE offset +.unalignedInitWord _picoMark_FUNCTION_BEGIN // FDE initial location +.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 // <-- FUNCTION_STACK_SIZE_GOES_HERE +.initByte 0x4 // DW_CFA_advance_loc4 +.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 +.align 2 +_picoMark_FdeEnd= + +//============================================================================ +// Abbrevation information. +//============================================================================ + +.section .debug_abbrev +_picoMark_ABBREVIATIONS= + +.section .debug_abbrev + .uleb128 0x1 // (abbrev code) + .uleb128 0x11 // (TAG: DW_TAG_compile_unit) + .initByte 0x1 // DW_children_yes + .uleb128 0x10 // (DW_AT_stmt_list) + .uleb128 0x6 // (DW_FORM_data4) + .uleb128 0x12 // (DW_AT_high_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x11 // (DW_AT_low_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x25 // (DW_AT_producer) + .uleb128 0x8 // (DW_FORM_string) + .uleb128 0x13 // (DW_AT_language) + .uleb128 0x5 // (DW_FORM_data2) + .uleb128 0x3 // (DW_AT_name) + .uleb128 0x8 // (DW_FORM_string) +.initByte 0x0 +.initByte 0x0 + + .uleb128 0x2 ;# (abbrev code) + .uleb128 0x2e ;# (TAG: DW_TAG_subprogram) +.initByte 0x0 ;# DW_children_no + .uleb128 0x3 ;# (DW_AT_name) + .uleb128 0x8 ;# (DW_FORM_string) + .uleb128 0x11 ;# (DW_AT_low_pc) + .uleb128 0x1 ;# (DW_FORM_addr) + .uleb128 0x12 ;# (DW_AT_high_pc) + .uleb128 0x1 ;# (DW_FORM_addr) +.initByte 0x0 +.initByte 0x0 + +.initByte 0x0 + +//============================================================================ +// Line information. DwarfLib requires this to be present, but it can +// be empty. +//============================================================================ + +.section .debug_line +_picoMark_LINES= + +//============================================================================ +// Debug Information +//============================================================================ +.section .debug_info + +//Fixed header. +.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN +_picoMark_DEBUG_INFO_BEGIN= +.unalignedInitWord 0x2 +.unalignedInitLong _picoMark_ABBREVIATIONS +.initByte 0x2 + +// Compile unit information. +.uleb128 0x1 // (DIE 0xb) DW_TAG_compile_unit) +.unalignedInitLong _picoMark_LINES +.unalignedInitWord _picoMark_FUNCTION_END +.unalignedInitWord _picoMark_FUNCTION_BEGIN +// Producer is `picoChip' +.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00# +.unalignedInitWord 0xcafe // ASM language +.ascii 16#0# // Name. DwarfLib expects this to be present. + +.uleb128 0x2 ;# (DIE DW_TAG_subprogram) + +// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex +// digit is specified using the format 16#XX# +.ascii 16#5f# 16#61# 16#73# 16#68# 16#6c# 16#73# 16#69# 16#33# 16#0# // Function name `_ashlsi3' +.unalignedInitWord _picoMark_FUNCTION_BEGIN // DW_AT_low_pc +.unalignedInitWord _picoMark_FUNCTION_END // DW_AT_high_pc + +.initByte 0x0 // end of compile unit children. + +_picoMark_DEBUG_INFO_END= + +//============================================================================ +// END OF DWARF +//============================================================================ + +.section .endFile diff --git a/config/picochip/libgccExtras/ashlsi3.c b/config/picochip/libgccExtras/ashlsi3.c new file mode 100644 index 0000000..7bab0ef --- /dev/null +++ b/config/picochip/libgccExtras/ashlsi3.c @@ -0,0 +1,87 @@ +/* + +picoChip GCC support for 32-bit shift left. + +Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. +Contributed by picoChip Designs Ltd. +Maintained by Daniel Towner (daniel.towner@picochip.com) + +This file is free software; you can redistribute it and/or modify it +under the terms of the GNU General Public License as published by the +Free Software Foundation; either version 2, or (at your option) any +later version. + +In addition to the permissions in the GNU General Public License, the +Free Software Foundation gives you unlimited permission to link the +compiled version of this file into combinations with other programs, +and to distribute those combinations without any restriction coming +from the use of this file. (The General Public License restrictions +do apply in other respects; for example, they cover modification of +the file, and distribution when not linked into a combine +executable.) + +This file is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; see the file COPYING. If not, write to +the Free Software Foundation, 51 Franklin Street, Fifth Floor, +Boston, MA 02110-1301, USA. */ + +#ifndef PICOCHIP +#error "Intended for compilation for PICOCHIP only." +#endif + +typedef int HItype __attribute__ ((mode (HI))); +typedef unsigned int UHItype __attribute__ ((mode (HI))); +typedef unsigned int USItype __attribute__ ((mode (SI))); + +typedef struct USIstruct { + UHItype low, high; +} USIstruct; + +typedef union USIunion { + USItype l; + USIstruct s; +} USIunion; + +USItype __ashlsi3(USIunion value, HItype count) { + USIunion result; + int temp; + + /* Ignore a zero count until we get into the (count < 16) + clause. This is slightly slower when shifting by zero, but faster + and smaller in all other cases (due to the better scheduling + opportunities available by putting the test near computational + instructions. */ + /* if (count == 0) return value.l; */ + + if (count < 16) { + /* Shift low and high words by the count. */ + result.s.low = value.s.low << count; + result.s.high = value.s.high << count; + + /* There is now a hole in the lower `count' bits of the high + word. Shift the upper `count' bits of the low word into the + high word. This is only required when the count is non-zero. */ + if (count != 0) { + temp = 16 - count; + temp = value.s.low >> temp; + result.s.high |= temp; + } + + } else { + /* Shift the lower word of the source into the upper word of the + result, and zero the result's lower word. */ + count -= 16; + result.s.high = value.s.low << count; + result.s.low = 0; + + } + + return result.l; + +} + diff --git a/config/picochip/libgccExtras/ashrsi3.asm b/config/picochip/libgccExtras/ashrsi3.asm new file mode 100644 index 0000000..da540d7 --- /dev/null +++ b/config/picochip/libgccExtras/ashrsi3.asm @@ -0,0 +1,207 @@ +// picoChip ASM file +// +// Support for 32-bit arithmetic shift right. +// +// Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. +// Contributed by picoChip Designs Ltd. +// Maintained by Hariharan Sandanagobalane (hariharan@picochip.com) +// +// This file is free software; you can redistribute it and/or modify it +// under the terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) any +// later version. +// +// In addition to the permissions in the GNU General Public License, the +// Free Software Foundation gives you unlimited permission to link the +// compiled version of this file into combinations with other programs, +// and to distribute those combinations without any restriction coming +// from the use of this file. (The General Public License restrictions +// do apply in other respects; for example, they cover modification of +// the file, and distribution when not linked into a combine +// executable.) +// +// This file is distributed in the hope that it will be useful, but +// WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; see the file COPYING. If not, write to +// the Free Software Foundation, 51 Franklin Street, Fifth Floor, +// Boston, MA 02110-1301, USA. + +.section .text + +.global ___ashrsi3 +___ashrsi3: +_picoMark_FUNCTION_BEGIN= + +// picoChip Function Prologue : &___ashrsi3 = 0 bytes + + // if (R2 > 15) goto _L2 + SUB.0 15,R2,r15 + JMPLT _L2 +=-> COPY.0 R1,R3 + + LSR.0 R1,R2,R1 // R1 := R1 >> R2 + // if (R2 == 0) goto _L4 + SUB.0 R2,0,r15 + JMPEQ _L4 +=-> LSR.0 R0,R2,R0 // R2 := R0 >> R2 + + SUB.0 16,R2,R4 // R4 := R4 - R2 (HI) + ASR.0 R3,15,R5 // R5 = R1 >>{arith} 15 + LSL.0 R5,R4,R5 // R5 := R5 << R4 + LSL.0 R3,R4,R4 // R4 := R1 << R4 + OR.0 R5,R1,R1 // R3 := R5 IOR R3 (HI) + BRA _L4 + =-> OR.0 R4,R0,R0 // R2 := R4 IOR R0 (HI) +_L2: + ASR.0 R1,15,R1 // R4 = R1 >>{arith} 15 + SUB.0 16,R2,R5 // R5 := R5 - R2 (HI) + LSR.0 R3,R2,R0 // R2 := R1 >> R2 + LSL.0 R1,R5,R5 // R5 := R4 << R5 + OR.0 R5,R0,R5 // R2 := R5 IOR R2 (HI) + SUB.0 R2,16,r15 // R5 := R5 - R2 (HI) + COPYNE R5,R0 +_L4: + JR (R12) // Return to caller + +_picoMark_FUNCTION_END= + +// picoChip Function Epilogue : __ashrsi3 +//============================================================================ +// All DWARF information between this marker, and the END OF DWARF +// marker should be included in the source file. Search for +// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and +// provide the relevent information. Add markers called +// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the +// function in question. +//============================================================================ + +//============================================================================ +// Frame information. +//============================================================================ + +.section .debug_frame +_picoMark_DebugFrame= + +// Common CIE header. +.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin +_picoMark_CieBegin= +.unalignedInitLong 0xffffffff +.initByte 0x1 // CIE Version +.ascii 16#0# // CIE Augmentation +.uleb128 0x1 // CIE Code Alignment Factor +.sleb128 2 // CIE Data Alignment Factor +.initByte 0xc // CIE RA Column +.initByte 0xc // DW_CFA_def_cfa +.uleb128 0xd +.uleb128 0x0 +.align 2 +_picoMark_CieEnd= + +// FDE +_picoMark_LSFDE0I900821033007563= +.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin +_picoMark_FdeBegin= +.unalignedInitLong _picoMark_DebugFrame // FDE CIE offset +.unalignedInitWord _picoMark_FUNCTION_BEGIN // FDE initial location +.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 // <-- FUNCTION_STACK_SIZE_GOES_HERE +.initByte 0x4 // DW_CFA_advance_loc4 +.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 +.align 2 +_picoMark_FdeEnd= + +//============================================================================ +// Abbrevation information. +//============================================================================ + +.section .debug_abbrev +_picoMark_ABBREVIATIONS= + +.section .debug_abbrev + .uleb128 0x1 // (abbrev code) + .uleb128 0x11 // (TAG: DW_TAG_compile_unit) + .initByte 0x1 // DW_children_yes + .uleb128 0x10 // (DW_AT_stmt_list) + .uleb128 0x6 // (DW_FORM_data4) + .uleb128 0x12 // (DW_AT_high_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x11 // (DW_AT_low_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x25 // (DW_AT_producer) + .uleb128 0x8 // (DW_FORM_string) + .uleb128 0x13 // (DW_AT_language) + .uleb128 0x5 // (DW_FORM_data2) + .uleb128 0x3 // (DW_AT_name) + .uleb128 0x8 // (DW_FORM_string) +.initByte 0x0 +.initByte 0x0 + + .uleb128 0x2 ;# (abbrev code) + .uleb128 0x2e ;# (TAG: DW_TAG_subprogram) +.initByte 0x0 ;# DW_children_no + .uleb128 0x3 ;# (DW_AT_name) + .uleb128 0x8 ;# (DW_FORM_string) + .uleb128 0x11 ;# (DW_AT_low_pc) + .uleb128 0x1 ;# (DW_FORM_addr) + .uleb128 0x12 ;# (DW_AT_high_pc) + .uleb128 0x1 ;# (DW_FORM_addr) +.initByte 0x0 +.initByte 0x0 + +.initByte 0x0 + +//============================================================================ +// Line information. DwarfLib requires this to be present, but it can +// be empty. +//============================================================================ + +.section .debug_line +_picoMark_LINES= + +//============================================================================ +// Debug Information +//============================================================================ +.section .debug_info + +//Fixed header. +.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN +_picoMark_DEBUG_INFO_BEGIN= +.unalignedInitWord 0x2 +.unalignedInitLong _picoMark_ABBREVIATIONS +.initByte 0x2 + +// Compile unit information. +.uleb128 0x1 // (DIE 0xb) DW_TAG_compile_unit) +.unalignedInitLong _picoMark_LINES +.unalignedInitWord _picoMark_FUNCTION_END +.unalignedInitWord _picoMark_FUNCTION_BEGIN +// Producer is `picoChip' +.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00# +.unalignedInitWord 0xcafe // ASM language +.ascii 16#0# // Name. DwarfLib expects this to be present. + +.uleb128 0x2 ;# (DIE DW_TAG_subprogram) + +// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex +// digit is specified using the format 16#XX# +.ascii 16#5f# 16#61# 16#73# 16#68# 16#72# 16#73# 16#69# 16#33# 16#0# // Function name `_ashrsi3' +.unalignedInitWord _picoMark_FUNCTION_BEGIN // DW_AT_low_pc +.unalignedInitWord _picoMark_FUNCTION_END // DW_AT_high_pc + +.initByte 0x0 // end of compile unit children. + +_picoMark_DEBUG_INFO_END= + +//============================================================================ +// END OF DWARF +//============================================================================ + +.section .endFile +// End of picoChip ASM file diff --git a/config/picochip/libgccExtras/ashrsi3.c b/config/picochip/libgccExtras/ashrsi3.c new file mode 100644 index 0000000..fee3342 --- /dev/null +++ b/config/picochip/libgccExtras/ashrsi3.c @@ -0,0 +1,118 @@ +/* + +picoChip GCC support for 32-bit arithmetic shift right. + +Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. +Contributed by picoChip Designs Ltd. +Maintained by Daniel Towner (daniel.towner@picochip.com) + +This file is free software; you can redistribute it and/or modify it +under the terms of the GNU General Public License as published by the +Free Software Foundation; either version 2, or (at your option) any +later version. + +In addition to the permissions in the GNU General Public License, the +Free Software Foundation gives you unlimited permission to link the +compiled version of this file into combinations with other programs, +and to distribute those combinations without any restriction coming +from the use of this file. (The General Public License restrictions +do apply in other respects; for example, they cover modification of +the file, and distribution when not linked into a combine +executable.) + +This file is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; see the file COPYING. If not, write to +the Free Software Foundation, 51 Franklin Street, Fifth Floor, +Boston, MA 02110-1301, USA. */ + +typedef int HItype __attribute__ ((mode (HI))); +typedef unsigned int UHItype __attribute__ ((mode (HI))); +typedef unsigned int USItype __attribute__ ((mode (SI))); + +typedef struct USIstruct { + UHItype low, high; +} USIstruct; + +typedef union USIunion { + USItype l; + USIstruct s; +} USIunion; + +USItype __ashrsi3(USIunion value, HItype count) { + USIunion result; + int temp; + int wordOfSignBits; + + /* Ignore a zero count until we get into the (count < 16) + clause. This is slightly slower when shifting by zero, but faster + and smaller in all other cases (due to the better scheduling + opportunities available by putting the test near computational + instructions. */ + /* if (count == 0) return value.l; */ + + if (count < 16) { + /* Shift low and high words by the count. The high word must use + an arithmetic shift. There is no arithmetic shift-right by + variable, so synthesise it. */ + int signWord; + int reverseCount; + + /* Shift low and high parts by the count. The upper word now has + invalid signed bits. */ + result.s.low = value.s.low >> count; + result.s.high = value.s.high >> count; + + if (count != 0) { + + reverseCount = 16 - count; + + /* Given a word of sign bits, shift back left to create the + destination sign bits. */ + wordOfSignBits = __builtin_asri(value.s.high, 15); + signWord = wordOfSignBits << reverseCount; + result.s.high |= signWord; + + /* There is now a hole in the upper `count' bits of the low + word. Shift the lower `count' bits of the upper word into the + low word. */ + temp = value.s.high << reverseCount; + result.s.low |= temp; + } + + } else { + int signWord; + + /* Shift is greater than one word, so top word will always be set + to sign bits, and bottom word will be shifted from top word. */ + result.s.low = value.s.high >> count; + result.s.high = __builtin_asri(value.s.high, 15); + + if (count != 16) { + + /* Shift the upper word of the source into the lower word of the + result. Arithmetically shift the upper word as well, to retain + the sign. This shift must be synthesised, as no such shift + exists in the instruction set. */ + int signWord; + + + /* Given a complete word of sign-bits, shift this back left to + create the destination sign bits. */ + signWord = result.s.high << (16 - count); + // signWord = wordOfSignBits << (16 - count); + + /* Insert the sign bits to the result's low word. */ + result.s.low |= signWord; + + } + + } + + return result.l; + +} diff --git a/config/picochip/libgccExtras/clzsi2.asm b/config/picochip/libgccExtras/clzsi2.asm new file mode 100644 index 0000000..c4a0923 --- /dev/null +++ b/config/picochip/libgccExtras/clzsi2.asm @@ -0,0 +1,166 @@ +// picoChip ASM file +//.file "clzsi2.asm" + +.section .text + +.global __clzsi2 +__clzsi2: +_picoMark_FUNCTION_BEGIN= + +// picoChip Function Prologue : &__clzsi2 = 0 bytes + + // What value should be operated on? If the top word is empty + // then count the bits in the bottom word, and add 16. If the + // top word is not empty, then count the bits in the top word. + + // R4 stores the constant 0 + + sub.0 R1,0,r15 \ copy.1 16,r2 + copyeq r0,r1 + copyne 0,r2 + + // R1 now stores value to count, and R2 stores current bit offset. + sbc r1,r0 + asr.0 r1,15,r15 \ add.1 r0,1,r0 + jr (lr) \ copyne 0,r0 +=-> add.0 r0,r2,r0 + +_picoMark_FUNCTION_END= + +// picoChip Function Epilogue : __clzsi2 + +//============================================================================ +// All DWARF information between this marker, and the END OF DWARF +// marker should be included in the source file. Search for +// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and +// provide the relevent information. Add markers called +// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the +// function in question. +//============================================================================ + +//============================================================================ +// Frame information. +//============================================================================ + +.section .debug_frame +_picoMark_DebugFrame= + +// Common CIE header. +.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin +_picoMark_CieBegin= +.unalignedInitLong 0xffffffff +.initByte 0x1 // CIE Version +.ascii 16#0# // CIE Augmentation +.uleb128 0x1 // CIE Code Alignment Factor +.sleb128 2 // CIE Data Alignment Factor +.initByte 0xc // CIE RA Column +.initByte 0xc // DW_CFA_def_cfa +.uleb128 0xd +.uleb128 0x0 +.align 2 +_picoMark_CieEnd= + +// FDE +_picoMark_LSFDE0I900821033007563= +.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin +_picoMark_FdeBegin= +.unalignedInitLong _picoMark_DebugFrame // FDE CIE offset +.unalignedInitWord _picoMark_FUNCTION_BEGIN // FDE initial location +.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 // <-- FUNCTION_STACK_SIZE_GOES_HERE +.initByte 0x4 // DW_CFA_advance_loc4 +.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 +.align 2 +_picoMark_FdeEnd= + +//============================================================================ +// Abbrevation information. +//============================================================================ + +.section .debug_abbrev +_picoMark_ABBREVIATIONS= + +.section .debug_abbrev + .uleb128 0x1 // (abbrev code) + .uleb128 0x11 // (TAG: DW_TAG_compile_unit) + .initByte 0x1 // DW_children_yes + .uleb128 0x10 // (DW_AT_stmt_list) + .uleb128 0x6 // (DW_FORM_data4) + .uleb128 0x12 // (DW_AT_high_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x11 // (DW_AT_low_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x25 // (DW_AT_producer) + .uleb128 0x8 // (DW_FORM_string) + .uleb128 0x13 // (DW_AT_language) + .uleb128 0x5 // (DW_FORM_data2) + .uleb128 0x3 // (DW_AT_name) + .uleb128 0x8 // (DW_FORM_string) +.initByte 0x0 +.initByte 0x0 + + .uleb128 0x2 ;# (abbrev code) + .uleb128 0x2e ;# (TAG: DW_TAG_subprogram) +.initByte 0x0 ;# DW_children_no + .uleb128 0x3 ;# (DW_AT_name) + .uleb128 0x8 ;# (DW_FORM_string) + .uleb128 0x11 ;# (DW_AT_low_pc) + .uleb128 0x1 ;# (DW_FORM_addr) + .uleb128 0x12 ;# (DW_AT_high_pc) + .uleb128 0x1 ;# (DW_FORM_addr) +.initByte 0x0 +.initByte 0x0 + +.initByte 0x0 + +//============================================================================ +// Line information. DwarfLib requires this to be present, but it can +// be empty. +//============================================================================ + +.section .debug_line +_picoMark_LINES= + +//============================================================================ +// Debug Information +//============================================================================ +.section .debug_info + +//Fixed header. +.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN +_picoMark_DEBUG_INFO_BEGIN= +.unalignedInitWord 0x2 +.unalignedInitLong _picoMark_ABBREVIATIONS +.initByte 0x2 + +// Compile unit information. +.uleb128 0x1 // (DIE 0xb) DW_TAG_compile_unit) +.unalignedInitLong _picoMark_LINES +.unalignedInitWord _picoMark_FUNCTION_END +.unalignedInitWord _picoMark_FUNCTION_BEGIN +// Producer is `picoChip' +.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00# +.unalignedInitWord 0xcafe // ASM language +.ascii 16#0# // Name. DwarfLib expects this to be present. + +.uleb128 0x2 ;# (DIE DW_TAG_subprogram) + +// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex +// digit is specified using the format 16#XX# +.ascii 16#5F# 16#63# 16#6C# 16#7A# 16#73# 16#69# 16#32# 16#0# // Function name `_clzsi2' +.unalignedInitWord _picoMark_FUNCTION_BEGIN // DW_AT_low_pc +.unalignedInitWord _picoMark_FUNCTION_END // DW_AT_high_pc + +.initByte 0x0 // end of compile unit children. + +_picoMark_DEBUG_INFO_END= + +//============================================================================ +// END OF DWARF +//============================================================================ + +.section .endFile +// End of picoChip ASM file diff --git a/config/picochip/libgccExtras/cmpsi2.asm b/config/picochip/libgccExtras/cmpsi2.asm new file mode 100644 index 0000000..36a65d0 --- /dev/null +++ b/config/picochip/libgccExtras/cmpsi2.asm @@ -0,0 +1,217 @@ +// picoChip ASM file +//.file "ucmpsi2.c" +// +// Support for 32-bit signed compare. +// +// Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. +// Contributed by picoChip Designs Ltd. +// Maintained by Daniel Towner (daniel.towner@picochip.com) +// +// This file is free software; you can redistribute it and/or modify it +// under the terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) any +// later version. +// +// In addition to the permissions in the GNU General Public License, the +// Free Software Foundation gives you unlimited permission to link the +// compiled version of this file into combinations with other programs, +// and to distribute those combinations without any restriction coming +// from the use of this file. (The General Public License restrictions +// do apply in other respects; for example, they cover modification of +// the file, and distribution when not linked into a combine +// executable.) +// +// This file is distributed in the hope that it will be useful, but +// WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; see the file COPYING. If not, write to +// the Free Software Foundation, 51 Franklin Street, Fifth Floor, +// Boston, MA 02110-1301, USA. +// +// Compiled from the following, and then hand optimised. +// +// int __cmpsi2 (USItype x, USItype y) +// { +// +// SIunion lx; lx.l = x; +// SIunion ly; ly.l = y; +// +// if (lx.s.high < ly.s.high) +// return 0; +// else if (lx.s.high > ly.s.high) +// return 2; +// if (lx.s.low < ly.s.low) +// return 0; +// else if (lx.s.low > ly.s.low) +// return 2; +// return 1; +// } + +.section .text + +.align 8 +.global ___cmpsi2 +___cmpsi2: +_picoMark_FUNCTION_BEGIN= + +// picoChip Function Prologue : &___cmpsi2 = 0 bytes + + SUB.0 R1,R3,r15 + + BLT _L1 +=-> SUB.0 R3,R1,r15 \ COPY.1 0,R5 + + BLT _L1 +=-> SUB.0 R0,R2,r15 \ COPY.1 2,R5 + + BLO _L1 +=-> SUB.0 R2,R0,r15 \ COPY.1 0,R5 + + BLO _L1 +=-> COPY.0 2,R5 + + COPY.0 1,R5 +_L1: + JR (R12) +=-> COPY.0 R5,R0 + +_picoMark_FUNCTION_END= +// picoChip Function Epilogue : __cmpsi2 +//============================================================================ +// All DWARF information between this marker, and the END OF DWARF +// marker should be included in the source file. Search for +// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and +// provide the relevent information. Add markers called +// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the +// function in question. +//============================================================================ + +//============================================================================ +// Frame information. +//============================================================================ + +.section .debug_frame +_picoMark_DebugFrame= + +// Common CIE header. +.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin +_picoMark_CieBegin= +.unalignedInitLong 0xffffffff +.initByte 0x1 // CIE Version +.ascii 16#0# // CIE Augmentation +.uleb128 0x1 // CIE Code Alignment Factor +.sleb128 2 // CIE Data Alignment Factor +.initByte 0xc // CIE RA Column +.initByte 0xc // DW_CFA_def_cfa +.uleb128 0xd +.uleb128 0x0 +.align 2 +_picoMark_CieEnd= + +// FDE +_picoMark_LSFDE0I900821033007563= +.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin +_picoMark_FdeBegin= +.unalignedInitLong _picoMark_DebugFrame // FDE CIE offset +.unalignedInitWord _picoMark_FUNCTION_BEGIN // FDE initial location +.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 // <-- FUNCTION_STACK_SIZE_GOES_HERE +.initByte 0x4 // DW_CFA_advance_loc4 +.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 +.align 2 +_picoMark_FdeEnd= + +//============================================================================ +// Abbrevation information. +//============================================================================ + +.section .debug_abbrev +_picoMark_ABBREVIATIONS= + +.section .debug_abbrev + .uleb128 0x1 // (abbrev code) + .uleb128 0x11 // (TAG: DW_TAG_compile_unit) + .initByte 0x1 // DW_children_yes + .uleb128 0x10 // (DW_AT_stmt_list) + .uleb128 0x6 // (DW_FORM_data4) + .uleb128 0x12 // (DW_AT_high_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x11 // (DW_AT_low_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x25 // (DW_AT_producer) + .uleb128 0x8 // (DW_FORM_string) + .uleb128 0x13 // (DW_AT_language) + .uleb128 0x5 // (DW_FORM_data2) + .uleb128 0x3 // (DW_AT_name) + .uleb128 0x8 // (DW_FORM_string) +.initByte 0x0 +.initByte 0x0 + + .uleb128 0x2 ;# (abbrev code) + .uleb128 0x2e ;# (TAG: DW_TAG_subprogram) +.initByte 0x0 ;# DW_children_no + .uleb128 0x3 ;# (DW_AT_name) + .uleb128 0x8 ;# (DW_FORM_string) + .uleb128 0x11 ;# (DW_AT_low_pc) + .uleb128 0x1 ;# (DW_FORM_addr) + .uleb128 0x12 ;# (DW_AT_high_pc) + .uleb128 0x1 ;# (DW_FORM_addr) +.initByte 0x0 +.initByte 0x0 + +.initByte 0x0 + +//============================================================================ +// Line information. DwarfLib requires this to be present, but it can +// be empty. +//============================================================================ + +.section .debug_line +_picoMark_LINES= + +//============================================================================ +// Debug Information +//============================================================================ +.section .debug_info + +//Fixed header. +.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN +_picoMark_DEBUG_INFO_BEGIN= +.unalignedInitWord 0x2 +.unalignedInitLong _picoMark_ABBREVIATIONS +.initByte 0x2 + +// Compile unit information. +.uleb128 0x1 // (DIE 0xb) DW_TAG_compile_unit) +.unalignedInitLong _picoMark_LINES +.unalignedInitWord _picoMark_FUNCTION_END +.unalignedInitWord _picoMark_FUNCTION_BEGIN +// Producer is `picoChip' +.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00# +.unalignedInitWord 0xcafe // ASM language +.ascii 16#0# // Name. DwarfLib expects this to be present. + +.uleb128 0x2 ;# (DIE DW_TAG_subprogram) + +// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex +// digit is specified using the format 16#XX# +.ascii 16#5f# 16#5f# 16#63# 16#6d# 16#70# 16#73# 16#69# 16#32# 16#0# // Function name `__cmpsi2' +.unalignedInitWord _picoMark_FUNCTION_BEGIN // DW_AT_low_pc +.unalignedInitWord _picoMark_FUNCTION_END // DW_AT_high_pc + +.initByte 0x0 // end of compile unit children. + +_picoMark_DEBUG_INFO_END= + +//============================================================================ +// END OF DWARF +//============================================================================ + +.section .endFile +// End of picoChip ASM file diff --git a/config/picochip/libgccExtras/divmod15.asm b/config/picochip/libgccExtras/divmod15.asm new file mode 100644 index 0000000..da59e09 --- /dev/null +++ b/config/picochip/libgccExtras/divmod15.asm @@ -0,0 +1,268 @@ +// picoChip ASM file +// +// Support for 16-bit unsigned division/modulus. +// +// Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. +// Contributed by picoChip Designs Ltd. +// Maintained by Daniel Towner (daniel.towner@picochip.com) +// +// This file is free software; you can redistribute it and/or modify it +// under the terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) any +// later version. +// +// In addition to the permissions in the GNU General Public License, the +// Free Software Foundation gives you unlimited permission to link the +// compiled version of this file into combinations with other programs, +// and to distribute those combinations without any restriction coming +// from the use of this file. (The General Public License restrictions +// do apply in other respects; for example, they cover modification of +// the file, and distribution when not linked into a combine +// executable.) +// +// This file is distributed in the hope that it will be useful, but +// WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; see the file COPYING. If not, write to +// the Free Software Foundation, 51 Franklin Street, Fifth Floor, +// Boston, MA 02110-1301, USA. + +.section .text + +.global __divmod15 +__divmod15: +_picoMark_FUNCTION_BEGIN= + +// picoChip Function Prologue : &__divmod15 = 0 bytes + +__divmod15: + + // The picoChip instruction set has a divstep instruction which + // is used to perform one iteration of a binary division algorithm. + // The instruction allows 16-bit signed division to be implemented. + // It does not directly allow 16-bit unsigned division to be + // implemented. Thus, this function pulls out the common division + // iteration for 15-bits unsigned, and then special wrappers + // provide the logic to change this into a 16-bit signed or + // unsigned division, as appropriate. This allows the two + // versions of division to share a common implementation, reducing + // code size when the two are used together. It also reduces + // the maintenance overhead. + + // Input: + // r0 - dividend + // r1 - divisor + // Output: + // r0 - quotient + // r1 - remainder + // R5 is unused + + // Check for special cases. The emphasis is on detecting these as + // quickly as possible, so that the main division can be started. If + // the user requests division by one, division by self, and so on + // then they will just have to accept that this won't be particularly + // quick (relatively), whereas a real division (e.g., dividing a + // large value by a small value) will run as fast as possible + // (i.e., special case detection should not slow down the common case) + // + // Special cases to consider: + // + // Division by zero. + // Division of zero. + // Inputs are equal + // Divisor is bigger than dividend + // Division by power of two (can be shifted instead). + // Division by 1 (special case of power of two division) + // + // Division/modulus by zero is undefined (ISO C:6.5.5), so + // don't bother handling this special case. + // + // The special cases of division by a power of 2 are ignored, since + // they cause the general case to slow down. Omitting these + // special cases also reduces code size considerably. + + // Handle divisor >= dividend separately. Note that this also handles + // the case where the dividend is zero. Note that the flags must be + // preserved, since they are also used at the branch destination. + sub.0 r1,r0,r15 + sbc r0,r2 \ bge divisorGeDividend +=-> sbc r1,r4 + + // Compute the shift count. The amount by which the divisor + // must be shifted left to be aligned with the dividend. + sub.0 r4,r2,r3 + + // Align the divisor to the dividend. Execute a divstep (since at + // least one will always be executed). Skip the remaining loop + // if the shift count is zero. + lsl.0 r1,r3,r1 \ beq skipLoop +=-> divstep r0,r1 \ add.1 r3,1,r2 + + // Execute the divstep loop until temp is 0. This assumes that the + // loop count is at least one. + sub.0 r3,1,r4 +divLoop: + divstep r0,r1 \ bne divLoop +=-> sub.0 r4,1,r4 + +skipLoop: + + // The top bits of the result are the remainder. The bottom + // bits are the quotient. + lsr.0 r0,r2,r1 \ sub.1 16,r2,r4 + jr (lr ) \ lsl.0 r0,r4,r0 +=-> lsr.0 r0,r4,r0 + +// Special case. + +divisorGeDividend: + // The divisor is greater than or equal to the dividend. The flags + // indicate which of these alternatives it is. The COPYNE can be used + // to set the result appropriately, without introducing any more + // branches. + copy.0 r0,r1 \ copy.1 0,r0 + jr (lr) \ copyeq r0,r1 +=-> copyeq 1,r0 + +_picoMark_FUNCTION_END= +// picoChip Function Epilogue : __divmod15 + + +//============================================================================ +// All DWARF information between this marker, and the END OF DWARF +// marker should be included in the source file. Search for +// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and +// provide the relevent information. Add markers called +// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the +// function in question. +//============================================================================ + +//============================================================================ +// Frame information. +//============================================================================ + +.section .debug_frame +_picoMark_DebugFrame= + +// Common CIE header. +.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin +_picoMark_CieBegin= +.unalignedInitLong 0xffffffff +.initByte 0x1 // CIE Version +.ascii 16#0# // CIE Augmentation +.uleb128 0x1 // CIE Code Alignment Factor +.sleb128 2 // CIE Data Alignment Factor +.initByte 0xc // CIE RA Column +.initByte 0xc // DW_CFA_def_cfa +.uleb128 0xd +.uleb128 0x0 +.align 2 +_picoMark_CieEnd= + +// FDE +_picoMark_LSFDE0I900821033007563= +.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin +_picoMark_FdeBegin= +.unalignedInitLong _picoMark_DebugFrame // FDE CIE offset +.unalignedInitWord _picoMark_FUNCTION_BEGIN // FDE initial location +.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 // <-- FUNCTION_STACK_SIZE_GOES_HERE +.initByte 0x4 // DW_CFA_advance_loc4 +.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 +.align 2 +_picoMark_FdeEnd= + +//============================================================================ +// Abbrevation information. +//============================================================================ + +.section .debug_abbrev +_picoMark_ABBREVIATIONS= + +.section .debug_abbrev + .uleb128 0x1 // (abbrev code) + .uleb128 0x11 // (TAG: DW_TAG_compile_unit) + .initByte 0x1 // DW_children_yes + .uleb128 0x10 // (DW_AT_stmt_list) + .uleb128 0x6 // (DW_FORM_data4) + .uleb128 0x12 // (DW_AT_high_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x11 // (DW_AT_low_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x25 // (DW_AT_producer) + .uleb128 0x8 // (DW_FORM_string) + .uleb128 0x13 // (DW_AT_language) + .uleb128 0x5 // (DW_FORM_data2) + .uleb128 0x3 // (DW_AT_name) + .uleb128 0x8 // (DW_FORM_string) +.initByte 0x0 +.initByte 0x0 + + .uleb128 0x2 ;# (abbrev code) + .uleb128 0x2e ;# (TAG: DW_TAG_subprogram) +.initByte 0x0 ;# DW_children_no + .uleb128 0x3 ;# (DW_AT_name) + .uleb128 0x8 ;# (DW_FORM_string) + .uleb128 0x11 ;# (DW_AT_low_pc) + .uleb128 0x1 ;# (DW_FORM_addr) + .uleb128 0x12 ;# (DW_AT_high_pc) + .uleb128 0x1 ;# (DW_FORM_addr) +.initByte 0x0 +.initByte 0x0 + +.initByte 0x0 + +//============================================================================ +// Line information. DwarfLib requires this to be present, but it can +// be empty. +//============================================================================ + +.section .debug_line +_picoMark_LINES= + +//============================================================================ +// Debug Information +//============================================================================ +.section .debug_info + +//Fixed header. +.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN +_picoMark_DEBUG_INFO_BEGIN= +.unalignedInitWord 0x2 +.unalignedInitLong _picoMark_ABBREVIATIONS +.initByte 0x2 + +// Compile unit information. +.uleb128 0x1 // (DIE 0xb) DW_TAG_compile_unit) +.unalignedInitLong _picoMark_LINES +.unalignedInitWord _picoMark_FUNCTION_END +.unalignedInitWord _picoMark_FUNCTION_BEGIN +// Producer is `picoChip' +.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00# +.unalignedInitWord 0xcafe // ASM language +.ascii 16#0# // Name. DwarfLib expects this to be present. + +.uleb128 0x2 ;# (DIE DW_TAG_subprogram) + +// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex +// digit is specified using the format 16#XX# +.ascii 16#5f# 16#64# 16#69# 16#76# 16#6d# 16#6f# 16#64# 16#31# 16#35# 16#0# // Function name `_divmod15' +.unalignedInitWord _picoMark_FUNCTION_BEGIN // DW_AT_low_pc +.unalignedInitWord _picoMark_FUNCTION_END // DW_AT_high_pc + +.initByte 0x0 // end of compile unit children. + +_picoMark_DEBUG_INFO_END= + +//============================================================================ +// END OF DWARF +//============================================================================ + +.section .endFile +// End of picoChip ASM file diff --git a/config/picochip/libgccExtras/divmodhi4.asm b/config/picochip/libgccExtras/divmodhi4.asm new file mode 100644 index 0000000..78a0673 --- /dev/null +++ b/config/picochip/libgccExtras/divmodhi4.asm @@ -0,0 +1,251 @@ +// picoChip ASM file +// +// Support for 16-bit signed division/modulus. +// +// Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. +// Contributed by picoChip Designs Ltd. +// Maintained by Daniel Towner (daniel.towner@picochip.com) +// +// This file is free software; you can redistribute it and/or modify it +// under the terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) any +// later version. +// +// In addition to the permissions in the GNU General Public License, the +// Free Software Foundation gives you unlimited permission to link the +// compiled version of this file into combinations with other programs, +// and to distribute those combinations without any restriction coming +// from the use of this file. (The General Public License restrictions +// do apply in other respects; for example, they cover modification of +// the file, and distribution when not linked into a combine +// executable.) +// +// This file is distributed in the hope that it will be useful, but +// WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; see the file COPYING. If not, write to +// the Free Software Foundation, 51 Franklin Street, Fifth Floor, +// Boston, MA 02110-1301, USA. + +.section .text + +.align 8 +.global __divmodhi4 +__divmodhi4: +_picoMark_FUNCTION_BEGIN= + +// picoChip Function Prologue : &__divmodhi4 = 4 bytes + + // 16-bit signed division. Most of the special cases are dealt + // with by the 15-bit signed division library (e.g., division by + // zero, division by 1, and so on). This wrapper simply inverts + // any negative inputs, calls the 15-bit library, and flips any + // results as necessary. The + // only special cases to be handled here are where either the + // divisor or the dividend are the maximum negative values. + + // Encode r5 with a bit pattern which indicates whether the + // outputs of the division must be negated. The MSB will be set + // to the sign of the dividend (which controls the remainder's + // sign), while the LSB will store the XOR of the two signs, + // which indicates the quotient's sign. R5 is not modified by the + // 15-bit divmod routine. + sub.0 r1,16#8000#,r15 \ asr.1 r0,15,r4 + beq divisorIsLargestNegative \ lsr.0 r1,15,r3 +=-> sub.0 r0,16#8000#,r15 \ xor.1 r3,r4,r5 + + // Handle least negative dividend with a special case. Note that the + // absolute value of the divisor is also computed here. + add.0 [asr r1,15],r1,r3 \ beq dividendIsLargestNegative +=-> xor.0 [asr r1,15],r3,r1 \ stw lr,(fp)-1 + + // Compute the absolute value of the dividend, and call the main + // divide routine. + add.0 r4,r0,r2 \ jl (&__divmod15) // fn_call &__divmod15 +=-> xor.0 r4,r2,r0 + +handleNegatedResults: + // Speculatively store the negation of the results. + sub.0 0,r0,r2 \ sub.1 0,r1,r3 + + // Does the quotient need negating? The LSB indicates this. + and.0 r5,1,r15 \ ldw (fp)-1,lr + copyne r2,r0 + + asr.0 r5,15,r15 \ jr (lr) +=-> copyne r3,r1 + +dividendIsLargestNegative: + + // Divide the constant -32768. Use the Hacker's Delight + // algorithm (i.e., ((dividend / 2) / divisor) * 2) gives + // approximate answer). This code is a special case, so no + // great effort is made to make it fast, only to make it + // small. + + lsr.0 r0,1,r0 \ jl (&__divmod15) // fn_call &__divmod15 +=-> stw r1,(fp)-2 + + // Load the original divisor, and compute the new quotient and + // remainder. + lsl.0 r0,1,r0 \ ldw (fp)-2,r3 + lsl.0 r1,1,r1 // Fill stall slot + + // The error in the quotient is 0 or 1. The error can be determined + // by comparing the remainder to the original divisor. If the + // remainder is bigger, then an error of 1 has been introduced, + // which must be fixed. + sub.0 r1,r3,r15 + blo noCompensationForError +=-> nop + add.0 r0,1,r0 \ sub.1 r1,r3,r1 +noCompensationForError: + bra handleNegatedResults +=-> nop + +divisorIsLargestNegative: + // The flags indicate whether the dividend is also the maximum negative + copy.0 r0,r1 \ copy.1 0,r0 + copyeq r0,r1 \ jr (lr) +=-> copyeq 1,r0 + +_picoMark_FUNCTION_END= +// picoChip Function Epilogue : __divmodhi4 + + +//============================================================================ +// All DWARF information between this marker, and the END OF DWARF +// marker should be included in the source file. Search for +// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and +// provide the relevent information. Add markers called +// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the +// function in question. +//============================================================================ + +//============================================================================ +// Frame information. +//============================================================================ + +.section .debug_frame +_picoMark_DebugFrame= + +// Common CIE header. +.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin +_picoMark_CieBegin= +.unalignedInitLong 0xffffffff +.initByte 0x1 // CIE Version +.ascii 16#0# // CIE Augmentation +.uleb128 0x1 // CIE Code Alignment Factor +.sleb128 2 // CIE Data Alignment Factor +.initByte 0xc // CIE RA Column +.initByte 0xc // DW_CFA_def_cfa +.uleb128 0xd +.uleb128 0x0 +.align 2 +_picoMark_CieEnd= + +// FDE +_picoMark_LSFDE0I900821033007563= +.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin +_picoMark_FdeBegin= +.unalignedInitLong _picoMark_DebugFrame // FDE CIE offset +.unalignedInitWord _picoMark_FUNCTION_BEGIN // FDE initial location +.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x4 // <-- FUNCTION_STACK_SIZE_GOES_HERE +.initByte 0x4 // DW_CFA_advance_loc4 +.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 +.align 2 +_picoMark_FdeEnd= + +//============================================================================ +// Abbrevation information. +//============================================================================ + +.section .debug_abbrev +_picoMark_ABBREVIATIONS= + +.section .debug_abbrev + .uleb128 0x1 // (abbrev code) + .uleb128 0x11 // (TAG: DW_TAG_compile_unit) + .initByte 0x1 // DW_children_yes + .uleb128 0x10 // (DW_AT_stmt_list) + .uleb128 0x6 // (DW_FORM_data4) + .uleb128 0x12 // (DW_AT_high_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x11 // (DW_AT_low_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x25 // (DW_AT_producer) + .uleb128 0x8 // (DW_FORM_string) + .uleb128 0x13 // (DW_AT_language) + .uleb128 0x5 // (DW_FORM_data2) + .uleb128 0x3 // (DW_AT_name) + .uleb128 0x8 // (DW_FORM_string) +.initByte 0x0 +.initByte 0x0 + + .uleb128 0x2 ;# (abbrev code) + .uleb128 0x2e ;# (TAG: DW_TAG_subprogram) +.initByte 0x0 ;# DW_children_no + .uleb128 0x3 ;# (DW_AT_name) + .uleb128 0x8 ;# (DW_FORM_string) + .uleb128 0x11 ;# (DW_AT_low_pc) + .uleb128 0x1 ;# (DW_FORM_addr) + .uleb128 0x12 ;# (DW_AT_high_pc) + .uleb128 0x1 ;# (DW_FORM_addr) +.initByte 0x0 +.initByte 0x0 + +.initByte 0x0 + +//============================================================================ +// Line information. DwarfLib requires this to be present, but it can +// be empty. +//============================================================================ + +.section .debug_line +_picoMark_LINES= + +//============================================================================ +// Debug Information +//============================================================================ +.section .debug_info + +//Fixed header. +.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN +_picoMark_DEBUG_INFO_BEGIN= +.unalignedInitWord 0x2 +.unalignedInitLong _picoMark_ABBREVIATIONS +.initByte 0x2 + +// Compile unit information. +.uleb128 0x1 // (DIE 0xb) DW_TAG_compile_unit) +.unalignedInitLong _picoMark_LINES +.unalignedInitWord _picoMark_FUNCTION_END +.unalignedInitWord _picoMark_FUNCTION_BEGIN +// Producer is `picoChip' +.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00# +.unalignedInitWord 0xcafe // ASM language +.ascii 16#0# // Name. DwarfLib expects this to be present. + +.uleb128 0x2 ;# (DIE DW_TAG_subprogram) + +// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex +// digit is specified using the format 16#XX# +.ascii 16#5f# 16#64# 16#69# 16#76# 16#6d# 16#6f# 16#64# 16#68# 16#69# 16#34# 16#0# // Function name `_divmodhi4' +.unalignedInitWord _picoMark_FUNCTION_BEGIN // DW_AT_low_pc +.unalignedInitWord _picoMark_FUNCTION_END // DW_AT_high_pc + +.initByte 0x0 // end of compile unit children. + +_picoMark_DEBUG_INFO_END= + +//============================================================================ +// END OF DWARF +//============================================================================ +.section .endFile diff --git a/config/picochip/libgccExtras/divmodsi4.asm b/config/picochip/libgccExtras/divmodsi4.asm new file mode 100644 index 0000000..5cc59bd --- /dev/null +++ b/config/picochip/libgccExtras/divmodsi4.asm @@ -0,0 +1,239 @@ +// picoChip ASM file +// +// Support for 32-bit signed division/modulus. +// +// Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. +// Contributed by picoChip Designs Ltd. +// Maintained by Daniel Towner (daniel.towner@picochip.com) +// +// This file is free software; you can redistribute it and/or modify it +// under the terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) any +// later version. +// +// In addition to the permissions in the GNU General Public License, the +// Free Software Foundation gives you unlimited permission to link the +// compiled version of this file into combinations with other programs, +// and to distribute those combinations without any restriction coming +// from the use of this file. (The General Public License restrictions +// do apply in other respects; for example, they cover modification of +// the file, and distribution when not linked into a combine +// executable.) +// +// This file is distributed in the hope that it will be useful, but +// WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; see the file COPYING. If not, write to +// the Free Software Foundation, 51 Franklin Street, Fifth Floor, +// Boston, MA 02110-1301, USA. + +// +.section .text + +.align 8 +.global __divmodsi4 +__divmodsi4: +_picoMark_FUNCTION_BEGIN= +// picoChip Function Prologue : &__divmodsi4 = 8 bytes + + // Note: optimising for size is preferred over optimising for speed. + + // Note: the frame is setup throughout the following instructions, + // and is complete at the point the udivmodsi4 function is called. + + // Note that R9 is encoded with a pattern which indicates + // whether the remainder and quotient should be negated on + // completion. The MSB is set to the sign of the dividend + // (i.e., the sign of the remainder), while the LSB encodes + // the XOR of the two input's signs (i.e., the sign of the + // quotient. + + // If dividend is negative, invert the dividend and flag. + ASR.0 r1,15,r4 + BEQ dividendNotNegative +=-> STL R[9:8],(FP)-2 + + // Dividend is negative - negate dividend. + SUB.0 0,R0,R0 + SUBB.0 0,R1,R1 + +dividendNotNegative: + + // If divisor is negative, invert the divisor. + AND.0 [lsr r3,15],1,r5 + SUB.0 R3,0, r15 + BGE divisorNotNegative +=-> XOR.0 r4,r5,r9 + + // Divisor is negative - negate divisor. + SUB.0 0,R2,R2 + SUBB.0 0,R3,R3 + +divisorNotNegative: + + STL R[13:12],(FP)-1 \ JL (&__udivmodsi4) +=-> SUB.0 FP,8,FP // udivmodsi expects the frame to be valid still. + + // The LSB of R9 indicates whether the quotient should be negated. + AND.0 r9,1,r15 + BEQ skipQuotientNegation +=-> LDL (FP)1,R[13:12] // Convenient point to restore link/fp + + SUB.0 0,R4,R4 + SUBB.0 0,R5,R5 + +skipQuotientNegation: + + // The MSB of R9 indicates whether the remainder should be negated. + ASR.0 R9,15,r15 + BEQ epilogue + + SUB.0 0,R6,R6 + SUBB.0 0,R7,R7 + +epilogue: + + JR (R12) +=-> LDL (FP)-2,R[9:8] + +_picoMark_FUNCTION_END= +// picoChip Function Epilogue : __divmodsi4 + +//============================================================================ +// All DWARF information between this marker, and the END OF DWARF +// marker should be included in the source file. Search for +// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and +// provide the relevent information. Add markers called +// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the +// function in question. +//============================================================================ + +//============================================================================ +// Frame information. +//============================================================================ + +.section .debug_frame +_picoMark_DebugFrame= + +// Common CIE header. +.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin +_picoMark_CieBegin= +.unalignedInitLong 0xffffffff +.initByte 0x1 // CIE Version +.ascii 16#0# // CIE Augmentation +.uleb128 0x1 // CIE Code Alignment Factor +.sleb128 2 // CIE Data Alignment Factor +.initByte 0xc // CIE RA Column +.initByte 0xc // DW_CFA_def_cfa +.uleb128 0xd +.uleb128 0x0 +.align 2 +_picoMark_CieEnd= + +// FDE +_picoMark_LSFDE0I900821033007563= +.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin +_picoMark_FdeBegin= +.unalignedInitLong _picoMark_DebugFrame // FDE CIE offset +.unalignedInitWord _picoMark_FUNCTION_BEGIN // FDE initial location +.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x8 // <-- FUNCTION_STACK_SIZE_GOES_HERE +.initByte 0x4 // DW_CFA_advance_loc4 +.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 +.align 2 +_picoMark_FdeEnd= + +//============================================================================ +// Abbrevation information. +//============================================================================ + +.section .debug_abbrev +_picoMark_ABBREVIATIONS= + +.section .debug_abbrev + .uleb128 0x1 // (abbrev code) + .uleb128 0x11 // (TAG: DW_TAG_compile_unit) + .initByte 0x1 // DW_children_yes + .uleb128 0x10 // (DW_AT_stmt_list) + .uleb128 0x6 // (DW_FORM_data4) + .uleb128 0x12 // (DW_AT_high_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x11 // (DW_AT_low_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x25 // (DW_AT_producer) + .uleb128 0x8 // (DW_FORM_string) + .uleb128 0x13 // (DW_AT_language) + .uleb128 0x5 // (DW_FORM_data2) + .uleb128 0x3 // (DW_AT_name) + .uleb128 0x8 // (DW_FORM_string) +.initByte 0x0 +.initByte 0x0 + + .uleb128 0x2 ;# (abbrev code) + .uleb128 0x2e ;# (TAG: DW_TAG_subprogram) +.initByte 0x0 ;# DW_children_no + .uleb128 0x3 ;# (DW_AT_name) + .uleb128 0x8 ;# (DW_FORM_string) + .uleb128 0x11 ;# (DW_AT_low_pc) + .uleb128 0x1 ;# (DW_FORM_addr) + .uleb128 0x12 ;# (DW_AT_high_pc) + .uleb128 0x1 ;# (DW_FORM_addr) +.initByte 0x0 +.initByte 0x0 + +.initByte 0x0 + +//============================================================================ +// Line information. DwarfLib requires this to be present, but it can +// be empty. +//============================================================================ + +.section .debug_line +_picoMark_LINES= + +//============================================================================ +// Debug Information +//============================================================================ +.section .debug_info + +//Fixed header. +.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN +_picoMark_DEBUG_INFO_BEGIN= +.unalignedInitWord 0x2 +.unalignedInitLong _picoMark_ABBREVIATIONS +.initByte 0x2 + +// Compile unit information. +.uleb128 0x1 // (DIE 0xb) DW_TAG_compile_unit) +.unalignedInitLong _picoMark_LINES +.unalignedInitWord _picoMark_FUNCTION_END +.unalignedInitWord _picoMark_FUNCTION_BEGIN +// Producer is `picoChip' +.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00# +.unalignedInitWord 0xcafe // ASM language +.ascii 16#0# // Name. DwarfLib expects this to be present. + +.uleb128 0x2 ;# (DIE DW_TAG_subprogram) + +// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex +// digit is specified using the format 16#XX# +.ascii 16#5f# 16#64# 16#69# 16#76# 16#6d# 16#6f# 16#64# 16#73# 16#69# 16#34# 16#0# // Function name `_divmodsi4' +.unalignedInitWord _picoMark_FUNCTION_BEGIN // DW_AT_low_pc +.unalignedInitWord _picoMark_FUNCTION_END // DW_AT_high_pc + +.initByte 0x0 // end of compile unit children. + +_picoMark_DEBUG_INFO_END= + +//============================================================================ +// END OF DWARF +//============================================================================ + +.section .endFile +// End of picoChip ASM file diff --git a/config/picochip/libgccExtras/fake_libgcc.asm b/config/picochip/libgccExtras/fake_libgcc.asm new file mode 100644 index 0000000..e4b78f1 --- /dev/null +++ b/config/picochip/libgccExtras/fake_libgcc.asm @@ -0,0 +1,6 @@ +// picoChip ASM file +// Fake libgcc asm file. This contains nothing, but is used to prevent gcc +// getting upset about the lack of a libgcc.S file when LIB1ASMFUNCS is defined +// to switch off the compilation of parts of libgcc. + + diff --git a/config/picochip/libgccExtras/longjmp.asm b/config/picochip/libgccExtras/longjmp.asm new file mode 100644 index 0000000..d8e12b4 --- /dev/null +++ b/config/picochip/libgccExtras/longjmp.asm @@ -0,0 +1,187 @@ +// picoChip ASM file +// +// Support for 32-bit arithmetic shift right. +// +// Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. +// Contributed by picoChip Designs Ltd. +// Maintained by Hariharan Sandanagobalane (hariharan@picochip.com) +// +// This file is free software; you can redistribute it and/or modify it +// under the terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) any +// later version. +// +// In addition to the permissions in the GNU General Public License, the +// Free Software Foundation gives you unlimited permission to link the +// compiled version of this file into combinations with other programs, +// and to distribute those combinations without any restriction coming +// from the use of this file. (The General Public License restrictions +// do apply in other respects; for example, they cover modification of +// the file, and distribution when not linked into a combine +// executable.) +// +// This file is distributed in the hope that it will be useful, but +// WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; see the file COPYING. If not, write to +// the Free Software Foundation, 51 Franklin Street, Fifth Floor, +// Boston, MA 02110-1301, USA. + +.section .text + +.global _longjmp +_longjmp: +_picoMark_FUNCTION_BEGIN= + +// picoChip Function Prologue : &_longjmp = 0 bytes + + LDL (R0)0, R[3:2] + LDL (R0)1, R[5:4] + LDL (R0)2, R[7:6] + LDL (R0)3, R[9:8] + LDL (R0)4, R[11:10] + LDL (R0)5, R[13:12] + LDW (R0)12, R14 + LDW (R0)13, R1 + JR (R12) +=-> COPY.0 1,R0 + +// picoChip Function Epilogue : longjmp +//============================================================================ +// All DWARF information between this marker, and the END OF DWARF +// marker should be included in the source file. Search for +// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and +// provide the relevent information. Add markers called +// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the +// function in question. +//============================================================================ + +//============================================================================ +// Frame information. +//============================================================================ + +.section .debug_frame +_picoMark_DebugFrame= + +// Common CIE header. +.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin +_picoMark_CieBegin= +.unalignedInitLong 0xffffffff +.initByte 0x1 // CIE Version +.ascii 16#0# // CIE Augmentation +.uleb128 0x1 // CIE Code Alignment Factor +.sleb128 2 // CIE Data Alignment Factor +.initByte 0xc // CIE RA Column +.initByte 0xc // DW_CFA_def_cfa +.uleb128 0xd +.uleb128 0x0 +.align 2 +_picoMark_CieEnd= + +// FDE +_picoMark_LSFDE0I900821033007563= +.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin +_picoMark_FdeBegin= +.unalignedInitLong _picoMark_DebugFrame // FDE CIE offset +.unalignedInitWord _picoMark_FUNCTION_BEGIN // FDE initial location +.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 // <-- FUNCTION_STACK_SIZE_GOES_HERE +.initByte 0x4 // DW_CFA_advance_loc4 +.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 +.align 2 +_picoMark_FdeEnd= + +//============================================================================ +// Abbrevation information. +//============================================================================ + +.section .debug_abbrev +_picoMark_ABBREVIATIONS= + +.section .debug_abbrev + .uleb128 0x1 // (abbrev code) + .uleb128 0x11 // (TAG: DW_TAG_compile_unit) + .initByte 0x1 // DW_children_yes + .uleb128 0x10 // (DW_AT_stmt_list) + .uleb128 0x6 // (DW_FORM_data4) + .uleb128 0x12 // (DW_AT_high_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x11 // (DW_AT_low_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x25 // (DW_AT_producer) + .uleb128 0x8 // (DW_FORM_string) + .uleb128 0x13 // (DW_AT_language) + .uleb128 0x5 // (DW_FORM_data2) + .uleb128 0x3 // (DW_AT_name) + .uleb128 0x8 // (DW_FORM_string) +.initByte 0x0 +.initByte 0x0 + + .uleb128 0x2 ;# (abbrev code) + .uleb128 0x2e ;# (TAG: DW_TAG_subprogram) +.initByte 0x0 ;# DW_children_no + .uleb128 0x3 ;# (DW_AT_name) + .uleb128 0x8 ;# (DW_FORM_string) + .uleb128 0x11 ;# (DW_AT_low_pc) + .uleb128 0x1 ;# (DW_FORM_addr) + .uleb128 0x12 ;# (DW_AT_high_pc) + .uleb128 0x1 ;# (DW_FORM_addr) +.initByte 0x0 +.initByte 0x0 + +.initByte 0x0 + +//============================================================================ +// Line information. DwarfLib requires this to be present, but it can +// be empty. +//============================================================================ + +.section .debug_line +_picoMark_LINES= + +//============================================================================ +// Debug Information +//============================================================================ +.section .debug_info + +//Fixed header. +.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN +_picoMark_DEBUG_INFO_BEGIN= +.unalignedInitWord 0x2 +.unalignedInitLong _picoMark_ABBREVIATIONS +.initByte 0x2 + +// Compile unit information. +.uleb128 0x1 // (DIE 0xb) DW_TAG_compile_unit) +.unalignedInitLong _picoMark_LINES +.unalignedInitWord _picoMark_FUNCTION_END +.unalignedInitWord _picoMark_FUNCTION_BEGIN +// Producer is `picoChip' +.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00# +.unalignedInitWord 0xcafe // ASM language +.ascii 16#0# // Name. DwarfLib expects this to be present. + +.uleb128 0x2 ;# (DIE DW_TAG_subprogram) + +// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex +// digit is specified using the format 16#XX# +.ascii 16#6c# 16#6f# 16#6e# 16#67# 16#6a# 16#6d# 16#70# 16#0# // Function name `longjmp' +.unalignedInitWord _picoMark_FUNCTION_BEGIN // DW_AT_low_pc +.unalignedInitWord _picoMark_FUNCTION_END // DW_AT_high_pc + +.initByte 0x0 // end of compile unit children. + +_picoMark_DEBUG_INFO_END= + +//============================================================================ +// END OF DWARF +//============================================================================ + +.section .endFile +// End of picoChip ASM file diff --git a/config/picochip/libgccExtras/lshrsi3.asm b/config/picochip/libgccExtras/lshrsi3.asm new file mode 100644 index 0000000..aada293 --- /dev/null +++ b/config/picochip/libgccExtras/lshrsi3.asm @@ -0,0 +1,195 @@ +// picoChip ASM file +// +// Support for 32-bit logical shift right. +// +// Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. +// Contributed by picoChip Designs Ltd. +// Maintained by Hariharan Sandanagobalane (hariharan@picochip.com) +// +// This file is free software; you can redistribute it and/or modify it +// under the terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) any +// later version. +// +// In addition to the permissions in the GNU General Public License, the +// Free Software Foundation gives you unlimited permission to link the +// compiled version of this file into combinations with other programs, +// and to distribute those combinations without any restriction coming +// from the use of this file. (The General Public License restrictions +// do apply in other respects; for example, they cover modification of +// the file, and distribution when not linked into a combine +// executable.) +// +// This file is distributed in the hope that it will be useful, but +// WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; see the file COPYING. If not, write to +// the Free Software Foundation, 51 Franklin Street, Fifth Floor, +// Boston, MA 02110-1301, USA. +.section .text + +.global ___lshrsi3 +___lshrsi3: +_picoMark_FUNCTION_BEGIN= + +// picoChip Function Prologue : &___lshrsi3 = 4 bytes + + // if (R2 > 15) goto _L2 + SUB.0 15,R2,r15 + JMPLT _L2 +=-> SUB.0 16,R2,R5 // R5 := R5 - R2 (HI) + + LSR.0 R0,R2,R0 // R4 := R0 >> R2 + LSR.0 R1,R2,R3 // R3 := R1 >> R2 + // if (R2 == 0) goto _L4 + LSL.0 R1,R5,R5 // R5 := R1 << R5 + OR.0 R5,R0,R4 // R2 := R5 IOR R2 (HI) + SUB.0 R2,0,r15 + COPYNE R4,R0 // R0 := R2 + JR (R12) // Return to caller +=-> COPY.0 R3,R1 // R1 := R3 + +_L2: + LSR.0 R1,R2,R0 // R2 := R1 >> R2 + JR (R12) // Return to caller +=-> COPY.0 0,R1 // R3 := 0 (short constant) + +_picoMark_FUNCTION_END= +// picoChip Function Epilogue : __lshrsi3 + +//============================================================================ +// All DWARF information between this marker, and the END OF DWARF +// marker should be included in the source file. Search for +// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and +// provide the relevent information. Add markers called +// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the +// function in question. +//============================================================================ + +//============================================================================ +// Frame information. +//============================================================================ + +.section .debug_frame +_picoMark_DebugFrame= + +// Common CIE header. +.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin +_picoMark_CieBegin= +.unalignedInitLong 0xffffffff +.initByte 0x1 // CIE Version +.ascii 16#0# // CIE Augmentation +.uleb128 0x1 // CIE Code Alignment Factor +.sleb128 2 // CIE Data Alignment Factor +.initByte 0xc // CIE RA Column +.initByte 0xc // DW_CFA_def_cfa +.uleb128 0xd +.uleb128 0x0 +.align 2 +_picoMark_CieEnd= + +// FDE +_picoMark_LSFDE0I900821033007563= +.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin +_picoMark_FdeBegin= +.unalignedInitLong _picoMark_DebugFrame // FDE CIE offset +.unalignedInitWord _picoMark_FUNCTION_BEGIN // FDE initial location +.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x4 // <-- FUNCTION_STACK_SIZE_GOES_HERE +.initByte 0x4 // DW_CFA_advance_loc4 +.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 +.align 2 +_picoMark_FdeEnd= + +//============================================================================ +// Abbrevation information. +//============================================================================ + +.section .debug_abbrev +_picoMark_ABBREVIATIONS= + +.section .debug_abbrev + .uleb128 0x1 // (abbrev code) + .uleb128 0x11 // (TAG: DW_TAG_compile_unit) + .initByte 0x1 // DW_children_yes + .uleb128 0x10 // (DW_AT_stmt_list) + .uleb128 0x6 // (DW_FORM_data4) + .uleb128 0x12 // (DW_AT_high_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x11 // (DW_AT_low_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x25 // (DW_AT_producer) + .uleb128 0x8 // (DW_FORM_string) + .uleb128 0x13 // (DW_AT_language) + .uleb128 0x5 // (DW_FORM_data2) + .uleb128 0x3 // (DW_AT_name) + .uleb128 0x8 // (DW_FORM_string) +.initByte 0x0 +.initByte 0x0 + + .uleb128 0x2 ;# (abbrev code) + .uleb128 0x2e ;# (TAG: DW_TAG_subprogram) +.initByte 0x0 ;# DW_children_no + .uleb128 0x3 ;# (DW_AT_name) + .uleb128 0x8 ;# (DW_FORM_string) + .uleb128 0x11 ;# (DW_AT_low_pc) + .uleb128 0x1 ;# (DW_FORM_addr) + .uleb128 0x12 ;# (DW_AT_high_pc) + .uleb128 0x1 ;# (DW_FORM_addr) +.initByte 0x0 +.initByte 0x0 + +.initByte 0x0 + +//============================================================================ +// Line information. DwarfLib requires this to be present, but it can +// be empty. +//============================================================================ + +.section .debug_line +_picoMark_LINES= + +//============================================================================ +// Debug Information +//============================================================================ +.section .debug_info + +//Fixed header. +.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN +_picoMark_DEBUG_INFO_BEGIN= +.unalignedInitWord 0x2 +.unalignedInitLong _picoMark_ABBREVIATIONS +.initByte 0x2 + +// Compile unit information. +.uleb128 0x1 // (DIE 0xb) DW_TAG_compile_unit) +.unalignedInitLong _picoMark_LINES +.unalignedInitWord _picoMark_FUNCTION_END +.unalignedInitWord _picoMark_FUNCTION_BEGIN +// Producer is `picoChip' +.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00# +.unalignedInitWord 0xcafe // ASM language +.ascii 16#0# // Name. DwarfLib expects this to be present. + +.uleb128 0x2 ;# (DIE DW_TAG_subprogram) + +// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex +// digit is specified using the format 16#XX# +.ascii 16#5f# 16#5f# 16#6c# 16#73# 16#68# 16#72# 16#72# 16#73# 16#69# 16#33# 16#0# // Function name `__lshrsi3' +.unalignedInitWord _picoMark_FUNCTION_BEGIN // DW_AT_low_pc +.unalignedInitWord _picoMark_FUNCTION_END // DW_AT_high_pc + +.initByte 0x0 // end of compile unit children. + +_picoMark_DEBUG_INFO_END= + +//============================================================================ +// END OF DWARF +//============================================================================ +.section .endFile diff --git a/config/picochip/libgccExtras/lshrsi3.c b/config/picochip/libgccExtras/lshrsi3.c new file mode 100644 index 0000000..e9b8524 --- /dev/null +++ b/config/picochip/libgccExtras/lshrsi3.c @@ -0,0 +1,81 @@ +/* + +picoChip GCC support for 32-bit logical shift right. + +Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. +Contributed by picoChip Designs Ltd. +Maintained by Daniel Towner (daniel.towner@picochip.com) + +This file is free software; you can redistribute it and/or modify it +under the terms of the GNU General Public License as published by the +Free Software Foundation; either version 2, or (at your option) any +later version. + +In addition to the permissions in the GNU General Public License, the +Free Software Foundation gives you unlimited permission to link the +compiled version of this file into combinations with other programs, +and to distribute those combinations without any restriction coming +from the use of this file. (The General Public License restrictions +do apply in other respects; for example, they cover modification of +the file, and distribution when not linked into a combine +executable.) + +This file is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; see the file COPYING. If not, write to +the Free Software Foundation, 51 Franklin Street, Fifth Floor, +Boston, MA 02110-1301, USA. */ + +typedef int HItype __attribute__ ((mode (HI))); +typedef unsigned int UHItype __attribute__ ((mode (HI))); +typedef unsigned int USItype __attribute__ ((mode (SI))); + +typedef struct USIstruct { + UHItype low, high; +} USIstruct; + +typedef union USIunion { + USItype l; + USIstruct s; +} USIunion; + +USItype __lshrsi3(USIunion value, HItype count) { + USIunion result; + int temp; + + /* Ignore a zero count until we get into the (count < 16) + clause. This is slightly slower when shifting by zero, but faster + and smaller in all other cases (due to the better scheduling + opportunities available by putting the test near computational + instructions. */ + + if (count < 16) { + /* Shift low and high words by the count. */ + result.s.low = value.s.low >> count; + result.s.high = value.s.high >> count; + + /* There is now a hole in the upper `count' bits of the low + word. Shift the lower `count' bits of the upper word into the + low word. This only works when count isn't zero. */ + if (count != 0) { + temp = value.s.high << (16 - count); + result.s.low |= temp; + } + + } else { + /* Shift the upper word of the source into the lower word of the + result, and zero the result's upper word. Note that we actually + ned to shift by (count - 16), but as we are only using the + bottom 4 bits, this is equivalent to shifting by count. */ + result.s.low = value.s.high >> count; + result.s.high = 0; + + } + + return result.l; + +} diff --git a/config/picochip/libgccExtras/parityhi2.asm b/config/picochip/libgccExtras/parityhi2.asm new file mode 100644 index 0000000..1ef87bf --- /dev/null +++ b/config/picochip/libgccExtras/parityhi2.asm @@ -0,0 +1,184 @@ +// picoChip ASM file +//.file "ucmpsi2.c" +// +// Support for parity checks. +// +// Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. +// Contributed by picoChip Designs Ltd. +// Maintained by Daniel Towner (daniel.towner@picochip.com) +// +// This file is free software; you can redistribute it and/or modify it +// under the terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) any +// later version. +// +// In addition to the permissions in the GNU General Public License, the +// Free Software Foundation gives you unlimited permission to link the +// compiled version of this file into combinations with other programs, +// and to distribute those combinations without any restriction coming +// from the use of this file. (The General Public License restrictions +// do apply in other respects; for example, they cover modification of +// the file, and distribution when not linked into a combine +// executable.) +// +// This file is distributed in the hope that it will be useful, but +// WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; see the file COPYING. If not, write to +// the Free Software Foundation, 51 Franklin Street, Fifth Floor, +// Boston, MA 02110-1301, USA. + +.section .text + +.align 8 +.global ___parityhi2 +___parityhi2: +_picoMark_FUNCTION_BEGIN= + +// picoChip Function Prologue : &___parityhi2 = 0 bytes + XOR.0 [LSR R0,8],R0,R0 + XOR.0 [LSR R0,4],R0,R0 + XOR.0 [LSR R0,2],R0,R0 + JR (R12) \ XOR.0 [LSR R0,1],R0,R0 +=-> AND.0 R0,1,R0 + +_picoMark_FUNCTION_END= +// picoChip Function Epilogue : __parityhi2 +//============================================================================ +// All DWARF information between this marker, and the END OF DWARF +// marker should be included in the source file. Search for +// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and +// provide the relevent information. Add markers called +// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the +// function in question. +//============================================================================ + +//============================================================================ +// Frame information. +//============================================================================ + +.section .debug_frame +_picoMark_DebugFrame= + +// Common CIE header. +.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin +_picoMark_CieBegin= +.unalignedInitLong 0xffffffff +.initByte 0x1 // CIE Version +.ascii 16#0# // CIE Augmentation +.uleb128 0x1 // CIE Code Alignment Factor +.sleb128 2 // CIE Data Alignment Factor +.initByte 0xc // CIE RA Column +.initByte 0xc // DW_CFA_def_cfa +.uleb128 0xd +.uleb128 0x0 +.align 2 +_picoMark_CieEnd= + +// FDE +_picoMark_LSFDE0I900821033007563= +.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin +_picoMark_FdeBegin= +.unalignedInitLong _picoMark_DebugFrame // FDE CIE offset +.unalignedInitWord _picoMark_FUNCTION_BEGIN // FDE initial location +.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 // <-- FUNCTION_STACK_SIZE_GOES_HERE +.initByte 0x4 // DW_CFA_advance_loc4 +.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 +.align 2 +_picoMark_FdeEnd= + +//============================================================================ +// Abbrevation information. +//============================================================================ + +.section .debug_abbrev +_picoMark_ABBREVIATIONS= + +.section .debug_abbrev + .uleb128 0x1 // (abbrev code) + .uleb128 0x11 // (TAG: DW_TAG_compile_unit) + .initByte 0x1 // DW_children_yes + .uleb128 0x10 // (DW_AT_stmt_list) + .uleb128 0x6 // (DW_FORM_data4) + .uleb128 0x12 // (DW_AT_high_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x11 // (DW_AT_low_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x25 // (DW_AT_producer) + .uleb128 0x8 // (DW_FORM_string) + .uleb128 0x13 // (DW_AT_language) + .uleb128 0x5 // (DW_FORM_data2) + .uleb128 0x3 // (DW_AT_name) + .uleb128 0x8 // (DW_FORM_string) +.initByte 0x0 +.initByte 0x0 + + .uleb128 0x2 ;# (abbrev code) + .uleb128 0x2e ;# (TAG: DW_TAG_subprogram) +.initByte 0x0 ;# DW_children_no + .uleb128 0x3 ;# (DW_AT_name) + .uleb128 0x8 ;# (DW_FORM_string) + .uleb128 0x11 ;# (DW_AT_low_pc) + .uleb128 0x1 ;# (DW_FORM_addr) + .uleb128 0x12 ;# (DW_AT_high_pc) + .uleb128 0x1 ;# (DW_FORM_addr) +.initByte 0x0 +.initByte 0x0 + +.initByte 0x0 + +//============================================================================ +// Line information. DwarfLib requires this to be present, but it can +// be empty. +//============================================================================ + +.section .debug_line +_picoMark_LINES= + +//============================================================================ +// Debug Information +//============================================================================ +.section .debug_info + +//Fixed header. +.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN +_picoMark_DEBUG_INFO_BEGIN= +.unalignedInitWord 0x2 +.unalignedInitLong _picoMark_ABBREVIATIONS +.initByte 0x2 + +// Compile unit information. +.uleb128 0x1 // (DIE 0xb) DW_TAG_compile_unit) +.unalignedInitLong _picoMark_LINES +.unalignedInitWord _picoMark_FUNCTION_END +.unalignedInitWord _picoMark_FUNCTION_BEGIN +// Producer is `picoChip' +.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00# +.unalignedInitWord 0xcafe // ASM language +.ascii 16#0# // Name. DwarfLib expects this to be present. + +.uleb128 0x2 ;# (DIE DW_TAG_subprogram) + +// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex +// digit is specified using the format 16#XX# +.ascii 16#5f# 16#5f# 16#70# 16#61# 16#72# 16#69# 16#74# 16#79# 16#68# 16#69# 16#32# 16#0# // Function name `__parityhi2' +.unalignedInitWord _picoMark_FUNCTION_BEGIN // DW_AT_low_pc +.unalignedInitWord _picoMark_FUNCTION_END // DW_AT_high_pc + +.initByte 0x0 // end of compile unit children. + +_picoMark_DEBUG_INFO_END= + +//============================================================================ +// END OF DWARF +//============================================================================ + +.section .endFile +// End of picoChip ASM file diff --git a/config/picochip/libgccExtras/popcounthi2.asm b/config/picochip/libgccExtras/popcounthi2.asm new file mode 100644 index 0000000..79f2f4c --- /dev/null +++ b/config/picochip/libgccExtras/popcounthi2.asm @@ -0,0 +1,206 @@ +// picoChip ASM file +//.file "popcounthi2.S" +// +// Support for 16-bit population count. +// +// Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. +// Contributed by picoChip Designs Ltd. +// Maintained by Daniel Towner (daniel.towner@picochip.com) +// +// This file is free software; you can redistribute it and/or modify it +// under the terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) any +// later version. +// +// In addition to the permissions in the GNU General Public License, the +// Free Software Foundation gives you unlimited permission to link the +// compiled version of this file into combinations with other programs, +// and to distribute those combinations without any restriction coming +// from the use of this file. (The General Public License restrictions +// do apply in other respects; for example, they cover modification of +// the file, and distribution when not linked into a combine +// executable.) +// +// This file is distributed in the hope that it will be useful, but +// WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; see the file COPYING. If not, write to +// the Free Software Foundation, 51 Franklin Street, Fifth Floor, +// Boston, MA 02110-1301, USA. + +.section .text + +// The following code (taken from a newsgroup posting) was compiled, and then +// hand assembled (a similar version is given in the Hacker's Delight +// book, chapter 5). +// +// int +// popcount (int value) +// { +// value = ((value & 0xAAAA) >> 1) + (value & 0x5555); +// value = ((value & 0xCCCC) >> 2) + (value & 0x3333); +// value = ((value & 0xF0F0) >> 4) + (value & 0x0F0F); +// return ((value & 0xFF00) >> 8) + (value & 0x00FF); +// } +// +// This assembly function is approx. 20x faster than a naive loop +// implementation of the population count, but about 30% bigger +// (45 bytes v. 34 bytes). + +.align 8 +.global ___popcounthi2 +___popcounthi2: + +_picoMark_FUNCTION_BEGIN= + +// picoChip Function Prologue : &___popcounthi2 = 0 bytes + + AND.0 [LSR R0,1],21845,R0 \ AND.1 R0,21845,R5 + ADD.0 R0,R5,R0 + AND.0 [LSR R0,2],13107,R0 \ AND.1 R0,13107,R5 + ADD.0 R0,R5,R0 \ COPY.1 1807,R2 + AND.0 [LSR R0,4],R2,R0 \ AND.1 R0,3855,R5 + ADD.0 R0,R5,R0 + JR (R12) \ AND.0 R0, 255, R5 +=-> ADD.0 [LSR R0,8],R5,R0 + +_picoMark_FUNCTION_END= +// picoChip Function Epilogue : ___popcounthi2 +//============================================================================ +// All DWARF information between this marker, and the END OF DWARF +// marker should be included in the source file. Search for +// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and +// provide the relevent information. Add markers called +// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the +// function in question. +//============================================================================ + +//============================================================================ +// Frame information. +//============================================================================ + +.section .debug_frame +_picoMark_DebugFrame= + +// Common CIE header. +.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin +_picoMark_CieBegin= +.unalignedInitLong 0xffffffff +.initByte 0x1 // CIE Version +.ascii 16#0# // CIE Augmentation +.uleb128 0x1 // CIE Code Alignment Factor +.sleb128 2 // CIE Data Alignment Factor +.initByte 0xc // CIE RA Column +.initByte 0xc // DW_CFA_def_cfa +.uleb128 0xd +.uleb128 0x0 +.align 2 +_picoMark_CieEnd= + +// FDE +_picoMark_LSFDE0I900821033007563= +.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin +_picoMark_FdeBegin= +.unalignedInitLong _picoMark_DebugFrame // FDE CIE offset +.unalignedInitWord _picoMark_FUNCTION_BEGIN // FDE initial location +.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 // <-- FUNCTION_STACK_SIZE_GOES_HERE +.initByte 0x4 // DW_CFA_advance_loc4 +.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 +.align 2 +_picoMark_FdeEnd= + +//============================================================================ +// Abbrevation information. +//============================================================================ + +.section .debug_abbrev +_picoMark_ABBREVIATIONS= + +.section .debug_abbrev + .uleb128 0x1 // (abbrev code) + .uleb128 0x11 // (TAG: DW_TAG_compile_unit) + .initByte 0x1 // DW_children_yes + .uleb128 0x10 // (DW_AT_stmt_list) + .uleb128 0x6 // (DW_FORM_data4) + .uleb128 0x12 // (DW_AT_high_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x11 // (DW_AT_low_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x25 // (DW_AT_producer) + .uleb128 0x8 // (DW_FORM_string) + .uleb128 0x13 // (DW_AT_language) + .uleb128 0x5 // (DW_FORM_data2) + .uleb128 0x3 // (DW_AT_name) + .uleb128 0x8 // (DW_FORM_string) +.initByte 0x0 +.initByte 0x0 + + .uleb128 0x2 ;# (abbrev code) + .uleb128 0x2e ;# (TAG: DW_TAG_subprogram) +.initByte 0x0 ;# DW_children_no + .uleb128 0x3 ;# (DW_AT_name) + .uleb128 0x8 ;# (DW_FORM_string) + .uleb128 0x11 ;# (DW_AT_low_pc) + .uleb128 0x1 ;# (DW_FORM_addr) + .uleb128 0x12 ;# (DW_AT_high_pc) + .uleb128 0x1 ;# (DW_FORM_addr) +.initByte 0x0 +.initByte 0x0 + +.initByte 0x0 + +//============================================================================ +// Line information. DwarfLib requires this to be present, but it can +// be empty. +//============================================================================ + +.section .debug_line +_picoMark_LINES= + +//============================================================================ +// Debug Information +//============================================================================ +.section .debug_info + +//Fixed header. +.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN +_picoMark_DEBUG_INFO_BEGIN= +.unalignedInitWord 0x2 +.unalignedInitLong _picoMark_ABBREVIATIONS +.initByte 0x2 + +// Compile unit information. +.uleb128 0x1 // (DIE 0xb) DW_TAG_compile_unit) +.unalignedInitLong _picoMark_LINES +.unalignedInitWord _picoMark_FUNCTION_END +.unalignedInitWord _picoMark_FUNCTION_BEGIN +// Producer is `picoChip' +.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00# +.unalignedInitWord 0xcafe // ASM language +.ascii 16#0# // Name. DwarfLib expects this to be present. + +.uleb128 0x2 ;# (DIE DW_TAG_subprogram) + +// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex +// digit is specified using the format 16#XX# +.ascii 16#5f# 16#5f# 16#70# 16#6f# 16#70# 16#63# 16#6f# 16#75# 16#6e# 16#74# 16#68# 16#69# 16#32# 16#0# // Function name `__popcounthi2' +.unalignedInitWord _picoMark_FUNCTION_BEGIN // DW_AT_low_pc +.unalignedInitWord _picoMark_FUNCTION_END // DW_AT_high_pc + +.initByte 0x0 // end of compile unit children. + +_picoMark_DEBUG_INFO_END= + +//============================================================================ +// END OF DWARF +//============================================================================ + +.section .endFile +// End of picoChip ASM file diff --git a/config/picochip/libgccExtras/setjmp.asm b/config/picochip/libgccExtras/setjmp.asm new file mode 100644 index 0000000..77f89d7 --- /dev/null +++ b/config/picochip/libgccExtras/setjmp.asm @@ -0,0 +1,187 @@ +// picoChip ASM file +// +// Support for 32-bit arithmetic shift right. +// +// Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. +// Contributed by picoChip Designs Ltd. +// Maintained by Hariharan Sandanagobalane (hariharan@picochip.com) +// +// This file is free software; you can redistribute it and/or modify it +// under the terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) any +// later version. +// +// In addition to the permissions in the GNU General Public License, the +// Free Software Foundation gives you unlimited permission to link the +// compiled version of this file into combinations with other programs, +// and to distribute those combinations without any restriction coming +// from the use of this file. (The General Public License restrictions +// do apply in other respects; for example, they cover modification of +// the file, and distribution when not linked into a combine +// executable.) +// +// This file is distributed in the hope that it will be useful, but +// WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; see the file COPYING. If not, write to +// the Free Software Foundation, 51 Franklin Street, Fifth Floor, +// Boston, MA 02110-1301, USA. + +.section .text + +.global _setjmp +_setjmp: +_picoMark_FUNCTION_BEGIN= + +// picoChip Function Prologue : &_setjmp = 0 bytes + + STL R[3:2],(R0)0 + STL R[5:4],(R0)1 + STL R[7:6],(R0)2 + STL R[9:8],(R0)3 + STL R[11:10],(R0)4 + STL R[13:12],(R0)5 + STW R14,(R0)12 + STW R1,(R0)13 + JR (R12) +=-> COPY.0 0,R0 + +// picoChip Function Epilogue : setjmp +//============================================================================ +// All DWARF information between this marker, and the END OF DWARF +// marker should be included in the source file. Search for +// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and +// provide the relevent information. Add markers called +// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the +// function in question. +//============================================================================ + +//============================================================================ +// Frame information. +//============================================================================ + +.section .debug_frame +_picoMark_DebugFrame= + +// Common CIE header. +.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin +_picoMark_CieBegin= +.unalignedInitLong 0xffffffff +.initByte 0x1 // CIE Version +.ascii 16#0# // CIE Augmentation +.uleb128 0x1 // CIE Code Alignment Factor +.sleb128 2 // CIE Data Alignment Factor +.initByte 0xc // CIE RA Column +.initByte 0xc // DW_CFA_def_cfa +.uleb128 0xd +.uleb128 0x0 +.align 2 +_picoMark_CieEnd= + +// FDE +_picoMark_LSFDE0I900821033007563= +.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin +_picoMark_FdeBegin= +.unalignedInitLong _picoMark_DebugFrame // FDE CIE offset +.unalignedInitWord _picoMark_FUNCTION_BEGIN // FDE initial location +.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 // <-- FUNCTION_STACK_SIZE_GOES_HERE +.initByte 0x4 // DW_CFA_advance_loc4 +.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 +.align 2 +_picoMark_FdeEnd= + +//============================================================================ +// Abbrevation information. +//============================================================================ + +.section .debug_abbrev +_picoMark_ABBREVIATIONS= + +.section .debug_abbrev + .uleb128 0x1 // (abbrev code) + .uleb128 0x11 // (TAG: DW_TAG_compile_unit) + .initByte 0x1 // DW_children_yes + .uleb128 0x10 // (DW_AT_stmt_list) + .uleb128 0x6 // (DW_FORM_data4) + .uleb128 0x12 // (DW_AT_high_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x11 // (DW_AT_low_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x25 // (DW_AT_producer) + .uleb128 0x8 // (DW_FORM_string) + .uleb128 0x13 // (DW_AT_language) + .uleb128 0x5 // (DW_FORM_data2) + .uleb128 0x3 // (DW_AT_name) + .uleb128 0x8 // (DW_FORM_string) +.initByte 0x0 +.initByte 0x0 + + .uleb128 0x2 ;# (abbrev code) + .uleb128 0x2e ;# (TAG: DW_TAG_subprogram) +.initByte 0x0 ;# DW_children_no + .uleb128 0x3 ;# (DW_AT_name) + .uleb128 0x8 ;# (DW_FORM_string) + .uleb128 0x11 ;# (DW_AT_low_pc) + .uleb128 0x1 ;# (DW_FORM_addr) + .uleb128 0x12 ;# (DW_AT_high_pc) + .uleb128 0x1 ;# (DW_FORM_addr) +.initByte 0x0 +.initByte 0x0 + +.initByte 0x0 + +//============================================================================ +// Line information. DwarfLib requires this to be present, but it can +// be empty. +//============================================================================ + +.section .debug_line +_picoMark_LINES= + +//============================================================================ +// Debug Information +//============================================================================ +.section .debug_info + +//Fixed header. +.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN +_picoMark_DEBUG_INFO_BEGIN= +.unalignedInitWord 0x2 +.unalignedInitLong _picoMark_ABBREVIATIONS +.initByte 0x2 + +// Compile unit information. +.uleb128 0x1 // (DIE 0xb) DW_TAG_compile_unit) +.unalignedInitLong _picoMark_LINES +.unalignedInitWord _picoMark_FUNCTION_END +.unalignedInitWord _picoMark_FUNCTION_BEGIN +// Producer is `picoChip' +.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00# +.unalignedInitWord 0xcafe // ASM language +.ascii 16#0# // Name. DwarfLib expects this to be present. + +.uleb128 0x2 ;# (DIE DW_TAG_subprogram) + +// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex +// digit is specified using the format 16#XX# +.ascii 16#73# 16#65# 16#74# 16#6a# 16#6d# 16#70# 16#0# // Function name `setjmp' +.unalignedInitWord _picoMark_FUNCTION_BEGIN // DW_AT_low_pc +.unalignedInitWord _picoMark_FUNCTION_END // DW_AT_high_pc + +.initByte 0x0 // end of compile unit children. + +_picoMark_DEBUG_INFO_END= + +//============================================================================ +// END OF DWARF +//============================================================================ + +.section .endFile +// End of picoChip ASM file diff --git a/config/picochip/libgccExtras/subdi3.asm b/config/picochip/libgccExtras/subdi3.asm new file mode 100644 index 0000000..4175d05 --- /dev/null +++ b/config/picochip/libgccExtras/subdi3.asm @@ -0,0 +1,196 @@ +// picoChip ASM file +// +// Support for 64-bit subtraction. +// +// Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. +// Contributed by picoChip Designs Ltd. +// Maintained by Hariharan Sandanagobalane (hariharan@picochip.com) +// +// This file is free software; you can redistribute it and/or modify it +// under the terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) any +// later version. +// +// In addition to the permissions in the GNU General Public License, the +// Free Software Foundation gives you unlimited permission to link the +// compiled version of this file into combinations with other programs, +// and to distribute those combinations without any restriction coming +// from the use of this file. (The General Public License restrictions +// do apply in other respects; for example, they cover modification of +// the file, and distribution when not linked into a combine +// executable.) +// +// This file is distributed in the hope that it will be useful, but +// WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; see the file COPYING. If not, write to +// the Free Software Foundation, 51 Franklin Street, Fifth Floor, +// Boston, MA 02110-1301, USA..global __divmodhi4 + +.section .text + +.align 8 +.global __subdi3 +__subdi3: + +_picoMark_FUNCTION_BEGIN= +// picoChip Function Prologue : &__subdi3 = 4 bytes + + // The first operand of sub is completely in registers r[2-5] + // The second operand of sub is in stack FP(0-3) + // and result need to be written pointed to by the register r0. + // All we need to do is to load the appropriate values, sub them + // appropriately (with sub or subb) and then store the values back. + ldw (FP)0, r1 + stl r[7:6], (FP)-1 + sub.0 r2, r1, r6 + ldw (FP)1, r1 + subb.0 r3, r1, r7 + ldl (FP)1, r[3:2] + stl r[7:6], (r0)0 + subb.0 r4, r2, r6 + subb.0 r5, r3, r7 + stl r[7:6], (r0)1 + jr (r12) +=-> ldl (FP)2, r[7:6] + +_picoMark_FUNCTION_END= +// picoChip Function Epilogue : __subdi3 + +//============================================================================ +// All DWARF information between this marker, and the END OF DWARF +// marker should be included in the source file. Search for +// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and +// provide the relevent information. Add markers called +// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the +// function in question. +//============================================================================ + +//============================================================================ +// Frame information. +//============================================================================ + +.section .debug_frame +_picoMark_DebugFrame= + +// Common CIE header. +.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin +_picoMark_CieBegin= +.unalignedInitLong 0xffffffff +.initByte 0x1 // CIE Version +.ascii 16#0# // CIE Augmentation +.uleb128 0x1 // CIE Code Alignment Factor +.sleb128 2 // CIE Data Alignment Factor +.initByte 0xc // CIE RA Column +.initByte 0xc // DW_CFA_def_cfa +.uleb128 0xd +.uleb128 0x0 +.align 2 +_picoMark_CieEnd= + +// FDE +_picoMark_LSFDE0I900821033007563= +.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin +_picoMark_FdeBegin= +.unalignedInitLong _picoMark_DebugFrame // FDE CIE offset +.unalignedInitWord _picoMark_FUNCTION_BEGIN // FDE initial location +.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x4 // <-- FUNCTION_STACK_SIZE_GOES_HERE +.initByte 0x4 // DW_CFA_advance_loc4 +.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 +.align 2 +_picoMark_FdeEnd= + +//============================================================================ +// Abbrevation information. +//============================================================================ + +.section .debug_abbrev +_picoMark_ABBREVIATIONS= + +.section .debug_abbrev + .uleb128 0x1 // (abbrev code) + .uleb128 0x11 // (TAG: DW_TAG_compile_unit) + .initByte 0x1 // DW_children_yes + .uleb128 0x10 // (DW_AT_stmt_list) + .uleb128 0x6 // (DW_FORM_data4) + .uleb128 0x12 // (DW_AT_high_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x11 // (DW_AT_low_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x25 // (DW_AT_producer) + .uleb128 0x8 // (DW_FORM_string) + .uleb128 0x13 // (DW_AT_language) + .uleb128 0x5 // (DW_FORM_data2) + .uleb128 0x3 // (DW_AT_name) + .uleb128 0x8 // (DW_FORM_string) +.initByte 0x0 +.initByte 0x0 + + .uleb128 0x2 ;# (abbrev code) + .uleb128 0x2e ;# (TAG: DW_TAG_subprogram) +.initByte 0x0 ;# DW_children_no + .uleb128 0x3 ;# (DW_AT_name) + .uleb128 0x8 ;# (DW_FORM_string) + .uleb128 0x11 ;# (DW_AT_low_pc) + .uleb128 0x1 ;# (DW_FORM_addr) + .uleb128 0x12 ;# (DW_AT_high_pc) + .uleb128 0x1 ;# (DW_FORM_addr) +.initByte 0x0 +.initByte 0x0 + +.initByte 0x0 + +//============================================================================ +// Line information. DwarfLib requires this to be present, but it can +// be empty. +//============================================================================ + +.section .debug_line +_picoMark_LINES= + +//============================================================================ +// Debug Information +//============================================================================ +.section .debug_info + +//Fixed header. +.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN +_picoMark_DEBUG_INFO_BEGIN= +.unalignedInitWord 0x2 +.unalignedInitLong _picoMark_ABBREVIATIONS +.initByte 0x2 + +// Compile unit information. +.uleb128 0x1 // (DIE 0xb) DW_TAG_compile_unit) +.unalignedInitLong _picoMark_LINES +.unalignedInitWord _picoMark_FUNCTION_END +.unalignedInitWord _picoMark_FUNCTION_BEGIN +// Producer is `picoChip' +.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00# +.unalignedInitWord 0xcafe // ASM language +.ascii 16#0# // Name. DwarfLib expects this to be present. + +.uleb128 0x2 ;# (DIE DW_TAG_subprogram) + +// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex +// digit is specified using the format 16#XX# +.ascii 16#5f# 16#73# 16#75# 16#62# 16#64# 16#69# 16#33# 16#0# // Function name `_subdi3' +.unalignedInitWord _picoMark_FUNCTION_BEGIN // DW_AT_low_pc +.unalignedInitWord _picoMark_FUNCTION_END // DW_AT_high_pc + +.initByte 0x0 // end of compile unit children. + +_picoMark_DEBUG_INFO_END= + +//============================================================================ +// END OF DWARF +//============================================================================ +.section .endFile + diff --git a/config/picochip/libgccExtras/ucmpsi2.asm b/config/picochip/libgccExtras/ucmpsi2.asm new file mode 100644 index 0000000..7a62362 --- /dev/null +++ b/config/picochip/libgccExtras/ucmpsi2.asm @@ -0,0 +1,214 @@ +// picoChip ASM file +//.file "ucmpsi2.c" +// +// Support for 32-bit unsigned compare. +// +// Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. +// Contributed by picoChip Designs Ltd. +// Maintained by Daniel Towner (daniel.towner@picochip.com) +// +// This file is free software; you can redistribute it and/or modify it +// under the terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) any +// later version. +// +// In addition to the permissions in the GNU General Public License, the +// Free Software Foundation gives you unlimited permission to link the +// compiled version of this file into combinations with other programs, +// and to distribute those combinations without any restriction coming +// from the use of this file. (The General Public License restrictions +// do apply in other respects; for example, they cover modification of +// the file, and distribution when not linked into a combine +// executable.) +// +// This file is distributed in the hope that it will be useful, but +// WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; see the file COPYING. If not, write to +// the Free Software Foundation, 51 Franklin Street, Fifth Floor, +// Boston, MA 02110-1301, USA. +// +// Compiled from the following, and then hand optimised. +// +// int __ucmpsi2 (USItype x, USItype y) +// { +// +// USIunion lx; lx.l = x; +// USIunion ly; ly.l = y; +// +// if (lx.s.high < ly.s.high) +// return 0; +// else if (lx.s.high > ly.s.high) +// return 2; +// if (lx.s.low < ly.s.low) +// return 0; +// else if (lx.s.low > ly.s.low) +// return 2; +// return 1; +// } + +.section .text + +.align 8 +.global ___ucmpsi2 +___ucmpsi2: +_picoMark_FUNCTION_BEGIN= +// picoChip Function Prologue : &___ucmpsi2 = 0 bytes + SUB.0 R1,R3,r15 + + BLO _L1 +=-> SUB.0 R3,R1,r15 \ COPY.1 0,R5 + + BLO _L1 +=-> SUB.0 R0,R2,r15 \ COPY.1 2,R5 + + BLO _L1 +=-> SUB.0 R2,R0,r15 \ COPY.1 0,R5 + + BLO _L1 +=-> COPY.0 2,R5 + + COPY.0 1,R5 +_L1: + JR (R12) +=-> COPY.0 R5,R0 // R0 := R5 + +_picoMark_FUNCTION_END= +// picoChip Function Epilogue : __ucmpsi2 +//============================================================================ +// All DWARF information between this marker, and the END OF DWARF +// marker should be included in the source file. Search for +// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and +// provide the relevent information. Add markers called +// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the +// function in question. +//============================================================================ + +//============================================================================ +// Frame information. +//============================================================================ + +.section .debug_frame +_picoMark_DebugFrame= + +// Common CIE header. +.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin +_picoMark_CieBegin= +.unalignedInitLong 0xffffffff +.initByte 0x1 // CIE Version +.ascii 16#0# // CIE Augmentation +.uleb128 0x1 // CIE Code Alignment Factor +.sleb128 2 // CIE Data Alignment Factor +.initByte 0xc // CIE RA Column +.initByte 0xc // DW_CFA_def_cfa +.uleb128 0xd +.uleb128 0x0 +.align 2 +_picoMark_CieEnd= + +// FDE +_picoMark_LSFDE0I900821033007563= +.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin +_picoMark_FdeBegin= +.unalignedInitLong _picoMark_DebugFrame // FDE CIE offset +.unalignedInitWord _picoMark_FUNCTION_BEGIN // FDE initial location +.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 // <-- FUNCTION_STACK_SIZE_GOES_HERE +.initByte 0x4 // DW_CFA_advance_loc4 +.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 +.align 2 +_picoMark_FdeEnd= + +//============================================================================ +// Abbrevation information. +//============================================================================ + +.section .debug_abbrev +_picoMark_ABBREVIATIONS= + +.section .debug_abbrev + .uleb128 0x1 // (abbrev code) + .uleb128 0x11 // (TAG: DW_TAG_compile_unit) + .initByte 0x1 // DW_children_yes + .uleb128 0x10 // (DW_AT_stmt_list) + .uleb128 0x6 // (DW_FORM_data4) + .uleb128 0x12 // (DW_AT_high_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x11 // (DW_AT_low_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x25 // (DW_AT_producer) + .uleb128 0x8 // (DW_FORM_string) + .uleb128 0x13 // (DW_AT_language) + .uleb128 0x5 // (DW_FORM_data2) + .uleb128 0x3 // (DW_AT_name) + .uleb128 0x8 // (DW_FORM_string) +.initByte 0x0 +.initByte 0x0 + + .uleb128 0x2 ;# (abbrev code) + .uleb128 0x2e ;# (TAG: DW_TAG_subprogram) +.initByte 0x0 ;# DW_children_no + .uleb128 0x3 ;# (DW_AT_name) + .uleb128 0x8 ;# (DW_FORM_string) + .uleb128 0x11 ;# (DW_AT_low_pc) + .uleb128 0x1 ;# (DW_FORM_addr) + .uleb128 0x12 ;# (DW_AT_high_pc) + .uleb128 0x1 ;# (DW_FORM_addr) +.initByte 0x0 +.initByte 0x0 + +.initByte 0x0 + +//============================================================================ +// Line information. DwarfLib requires this to be present, but it can +// be empty. +//============================================================================ + +.section .debug_line +_picoMark_LINES= + +//============================================================================ +// Debug Information +//============================================================================ +.section .debug_info + +//Fixed header. +.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN +_picoMark_DEBUG_INFO_BEGIN= +.unalignedInitWord 0x2 +.unalignedInitLong _picoMark_ABBREVIATIONS +.initByte 0x2 + +// Compile unit information. +.uleb128 0x1 // (DIE 0xb) DW_TAG_compile_unit) +.unalignedInitLong _picoMark_LINES +.unalignedInitWord _picoMark_FUNCTION_END +.unalignedInitWord _picoMark_FUNCTION_BEGIN +// Producer is `picoChip' +.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00# +.unalignedInitWord 0xcafe // ASM language +.ascii 16#0# // Name. DwarfLib expects this to be present. + +.uleb128 0x2 ;# (DIE DW_TAG_subprogram) + +// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex +// digit is specified using the format 16#XX# +.ascii 16#5f# 16#5f# 16#75# 16#63# 16#6d# 16#70# 16#73# 16#69# 16#32# 16#0# // Function name `__ucmpsi2' +.unalignedInitWord _picoMark_FUNCTION_BEGIN // DW_AT_low_pc +.unalignedInitWord _picoMark_FUNCTION_END // DW_AT_high_pc + +.initByte 0x0 // end of compile unit children. + +_picoMark_DEBUG_INFO_END= + +//============================================================================ +// END OF DWARF +//============================================================================ +.section .endFile +// End of picoChip ASM file diff --git a/config/picochip/libgccExtras/udivmodhi4.asm b/config/picochip/libgccExtras/udivmodhi4.asm new file mode 100644 index 0000000..9eb6224 --- /dev/null +++ b/config/picochip/libgccExtras/udivmodhi4.asm @@ -0,0 +1,243 @@ +// picoChip ASM file +// +// Support for 16-bit unsigned division/modulus. +// +// Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. +// Contributed by picoChip Designs Ltd. +// Maintained by Daniel Towner (daniel.towner@picochip.com) +// +// This file is free software; you can redistribute it and/or modify it +// under the terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) any +// later version. +// +// In addition to the permissions in the GNU General Public License, the +// Free Software Foundation gives you unlimited permission to link the +// compiled version of this file into combinations with other programs, +// and to distribute those combinations without any restriction coming +// from the use of this file. (The General Public License restrictions +// do apply in other respects; for example, they cover modification of +// the file, and distribution when not linked into a combine +// executable.) +// +// This file is distributed in the hope that it will be useful, but +// WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; see the file COPYING. If not, write to +// the Free Software Foundation, 51 Franklin Street, Fifth Floor, +// Boston, MA 02110-1301, USA. + +.section .text + +.global __udivmodhi4 +__udivmodhi4: +_picoMark_FUNCTION_BEGIN= + +// picoChip Function Prologue : &__udivmodhi4 = 6 bytes + + // 16-bit unsigned division. The divstep function is only capable of + // handling 15-bit division (plus a sign to give 16-bits). It is not + // capable of handling unsigned division directly. Instead, take + // advantage of the special property that + // ((divisor / 2) / dividend) * 2 will be almost good enough. The + // error in the result is only 0 or 1, and this can be easily + // tested and corrected. A full description of the algorithm can + // be found in `Hacker's Delight', by Henry Warren, page 146. + + // Input: + // r0 - dividend + // r1 - divisor + // Output: + // r0 - quotient + // r1 - remainder + + // Note that the lr, and original inputs are speculatively saved. They + // will only be restored if the 15-bit division function is called. + + sub.0 r1,0,r15 \ stl r[0:1],(fp)-1 + bge divisorIs15bit +=-> sub.0 r0,r1,r2 \ stw lr,(fp)-3 + + // The divisor is >= 2^15. + bhs quotientIs1 + + // The dividend < divisor. The quotient is thus 0, and the + // remainder is the dividend. + copy.0 r0,r1 \ jr (lr) +=-> copy.0 0,r0 + +quotientIs1: + // The dividend >= divisor. The quotient is thus 1, and the + // remainder can be computed directly by subtraction (i.e., the + // result of the comparison already performed to branch here). + jr (lr) \ copy.0 r2,r1 +=-> copy.0 1,r0 + +divisorIs15bit: + // The divisor is < 2^15. + + // Divide the original dividend by 2, and call the 15-bit division. + // Note that the original dividend is stored in r5, which is + // known to be unused by the called function, so that + // a memory stall isn't introduced immediately after the + // function returns, to reload this value from memory. + + jl (&__divmod15) \ copy.0 r0,r5 // fn_call &__divmod15 +=-> lsr.0 r0,1,r0 + + // Compute the new quotient and remainder by multiplying them by 2. + // The remainder will be 1 out, if the original dividend was odd. + and.0 r5,1,r5 \ ldl (fp)-1,r[2:3] + add.0 [lsl r1,1],r5,r1 \ lsl.1 r0,1,r0 + + // The error in the quotient is 0 or 1. The error can be determined + // by comparing the remainder to the original divisor. If the + // remainder is bigger, then an error of 1 has been introduced. + sub.0 r1,r3,r15 \ ldw (fp)-3,lr + blo noCompensation +=-> nop + add.0 r0,1,r0 \ sub.1 r1,r3,r1 +noCompensation: + jr (lr) + +_picoMark_FUNCTION_END= +// picoChip Function Epilogue : udivmodhi4 + + +//============================================================================ +// All DWARF information between this marker, and the END OF DWARF +// marker should be included in the source file. Search for +// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and +// provide the relevent information. Add markers called +// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the +// function in question. +//============================================================================ + +//============================================================================ +// Frame information. +//============================================================================ + +.section .debug_frame +_picoMark_DebugFrame= + +// Common CIE header. +.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin +_picoMark_CieBegin= +.unalignedInitLong 0xffffffff +.initByte 0x1 // CIE Version +.ascii 16#0# // CIE Augmentation +.uleb128 0x1 // CIE Code Alignment Factor +.sleb128 2 // CIE Data Alignment Factor +.initByte 0xc // CIE RA Column +.initByte 0xc // DW_CFA_def_cfa +.uleb128 0xd +.uleb128 0x0 +.align 2 +_picoMark_CieEnd= + +// FDE +_picoMark_LSFDE0I900821033007563= +.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin +_picoMark_FdeBegin= +.unalignedInitLong _picoMark_DebugFrame // FDE CIE offset +.unalignedInitWord _picoMark_FUNCTION_BEGIN // FDE initial location +.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x6 // <-- FUNCTION_STACK_SIZE_GOES_HERE +.initByte 0x4 // DW_CFA_advance_loc4 +.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 +.align 2 +_picoMark_FdeEnd= + +//============================================================================ +// Abbrevation information. +//============================================================================ + +.section .debug_abbrev +_picoMark_ABBREVIATIONS= + +.section .debug_abbrev + .uleb128 0x1 // (abbrev code) + .uleb128 0x11 // (TAG: DW_TAG_compile_unit) + .initByte 0x1 // DW_children_yes + .uleb128 0x10 // (DW_AT_stmt_list) + .uleb128 0x6 // (DW_FORM_data4) + .uleb128 0x12 // (DW_AT_high_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x11 // (DW_AT_low_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x25 // (DW_AT_producer) + .uleb128 0x8 // (DW_FORM_string) + .uleb128 0x13 // (DW_AT_language) + .uleb128 0x5 // (DW_FORM_data2) + .uleb128 0x3 // (DW_AT_name) + .uleb128 0x8 // (DW_FORM_string) +.initByte 0x0 +.initByte 0x0 + + .uleb128 0x2 ;# (abbrev code) + .uleb128 0x2e ;# (TAG: DW_TAG_subprogram) +.initByte 0x0 ;# DW_children_no + .uleb128 0x3 ;# (DW_AT_name) + .uleb128 0x8 ;# (DW_FORM_string) + .uleb128 0x11 ;# (DW_AT_low_pc) + .uleb128 0x1 ;# (DW_FORM_addr) + .uleb128 0x12 ;# (DW_AT_high_pc) + .uleb128 0x1 ;# (DW_FORM_addr) +.initByte 0x0 +.initByte 0x0 + +.initByte 0x0 + +//============================================================================ +// Line information. DwarfLib requires this to be present, but it can +// be empty. +//============================================================================ + +.section .debug_line +_picoMark_LINES= + +//============================================================================ +// Debug Information +//============================================================================ +.section .debug_info + +//Fixed header. +.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN +_picoMark_DEBUG_INFO_BEGIN= +.unalignedInitWord 0x2 +.unalignedInitLong _picoMark_ABBREVIATIONS +.initByte 0x2 + +// Compile unit information. +.uleb128 0x1 // (DIE 0xb) DW_TAG_compile_unit) +.unalignedInitLong _picoMark_LINES +.unalignedInitWord _picoMark_FUNCTION_END +.unalignedInitWord _picoMark_FUNCTION_BEGIN +// Producer is `picoChip' +.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00# +.unalignedInitWord 0xcafe // ASM language +.ascii 16#0# // Name. DwarfLib expects this to be present. + +.uleb128 0x2 ;# (DIE DW_TAG_subprogram) + +// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex +// digit is specified using the format 16#XX# +.ascii 16#5f# 16#75# 16#64# 16#69# 16#76# 16#6d# 16#6f# 16#64# 16#68# 16#69# 16#34# 16#0# // Function name `_udivmodhi4' +.unalignedInitWord _picoMark_FUNCTION_BEGIN // DW_AT_low_pc +.unalignedInitWord _picoMark_FUNCTION_END // DW_AT_high_pc + +.initByte 0x0 // end of compile unit children. + +_picoMark_DEBUG_INFO_END= + +//============================================================================ +// END OF DWARF +//============================================================================ +.section .endFile +// End of picoChip ASM file diff --git a/config/picochip/libgccExtras/udivmodsi4.asm b/config/picochip/libgccExtras/udivmodsi4.asm new file mode 100644 index 0000000..b992206 --- /dev/null +++ b/config/picochip/libgccExtras/udivmodsi4.asm @@ -0,0 +1,323 @@ +// picoChip ASM file +// +// Support for 32-bit unsigned division/modulus. +// +// Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. +// Contributed by picoChip Designs Ltd. +// Maintained by Daniel Towner (daniel.towner@picochip.com) +// +// This file is free software; you can redistribute it and/or modify it +// under the terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) any +// later version. +// +// In addition to the permissions in the GNU General Public License, the +// Free Software Foundation gives you unlimited permission to link the +// compiled version of this file into combinations with other programs, +// and to distribute those combinations without any restriction coming +// from the use of this file. (The General Public License restrictions +// do apply in other respects; for example, they cover modification of +// the file, and distribution when not linked into a combine +// executable.) +// +// This file is distributed in the hope that it will be useful, but +// WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; see the file COPYING. If not, write to +// the Free Software Foundation, 51 Franklin Street, Fifth Floor, +// Boston, MA 02110-1301, USA. + +.section .text + +.align 8 +.global __udivmodsi4 +__udivmodsi4: +_picoMark_FUNCTION_BEGIN= +// picoChip Function Prologue : &__udivmodsi4 = 24 bytes + + // Schedule the register saves alongside the special cases, so that + // if the special cases fail, the registers will have already + // been stored onto the stack. + SUB.0 R3,R1,r15 \ STL R[13:12],(FP)-1 + BHS skipCommonCase \ STL R[9:8],(FP)-4 +=-> SUB.0 R2,1,r15 \ STL R[11:10],(FP)-3 + +_L2: + // Flags set above, and in _L2 caller. + BNE restOfCode +=-> SUB.0 R3,0,r15 + BNE restOfCode +=-> COPY.0 R0,R4 \ COPY.1 R1,R5 + JR (R12) // Return to caller +=-> COPY.0 0,R6 \ COPY.1 0,R7 + // Never reach here + +skipCommonCase: + SUB.0 R3,R1,r15 + BNE _L3 // (Reversed branch) +=-> SUB.0 R2,R0,r15 // Must be set in delay slot, so ready by _L9 + +_L9: + BLO _L2 // (Reversed branch) +=-> SUB.0 R2,1,r15 + +_L3: + SUB.0 R2,R0,r15 + BEQ _L10 // (Reversed branch) +=-> SUB.0 R1,R3,r15 // Set flags for branch at _L10 + +_L4: + // greater than + COPY.0 0,R4 \ COPY.1 0,R5 \ JR (R12) // Return to caller +=-> COPY.0 R0,R6 \ COPY.1 R1,R7 + // Doesn't reach here. + +_L10: + // Flags set in _L10 call delay slot. + BNE _L4 +=-> COPY.0 1,R4 \ COPY.1 0,R5 + JR (R12) // Return to caller +=-> COPY.0 0,R6 \ COPY.1 0,R7 + +restOfCode: + +// Prologue + + // Register saves scheduled alongside special cases above. + ADD.0 FP,-20,FP \ STW R14,(FP)-4 + + // The following can be scheduled together. + // dividend in R[9:8] (from R[1:0]) + // divisor in R[7:6] (from R[3:2]) + // R14 := clzsi2 (dividend) + // R0 := clzsi2 (divisor) + JL (&__clzsi2) \ COPY.0 R0,R8 \ COPY.1 R1,R9 +=-> COPY.0 R2,R6 \ COPY.1 R3,R7 + COPY.0 R0,R14 \ JL (&__clzsi2) +=-> COPY.0 R6,R0 \ COPY.1 R7,R1 + + // R14 := R0 - R14 + SUB.0 R0,R14,R14 + + ADD.0 R14,1,R0 // R0 := R14 + 1 (HI) + + // R[11:10] = R[7,6] << R14 + SUB.0 15,R14,r15 + LSL.0 R6,R14,R11 \ BLT setupDivstepLoop +=-> SUB.0 0,R14,R4 \ COPY.1 0,R10 + + // Zero shift is a special case. Shifting by zero within a 16-bit + // source object is fine, but don't execute the OR of the right-shift + // into the final result. + LSL.0 R7,R14,R11 \ BEQ setupDivstepLoop +=-> LSL.0 R6,R14,R10 + + LSR.0 R6,R4,R4 + OR.0 R11,R4,R11 + +setupDivstepLoop: + + // R[5:4] := R[9:8] (SI) + COPY.0 R8,R4 \ COPY.1 R9,R5 + COPY.0 0,R6 \ COPY.1 R0,R8 + + // Store original value of loopCount for use after the loop. + // The Subtraction is handled in the tail of the loop iteration + // after this point. + SUB.0 R4,R10,R0 \ COPY.1 R8,R14 + + // workingResult in R4,5,6 + // temps in r0,1,2 and r7 + // alignedDivisor in R10,11 + // loopCount in r8 + // r3, r9 scratch, used for renaming. + +loopStart: + // R0 := R4 - zeroExtend (R10) - only need 33-bits (i.e., 48-bits) + SUBB.0 R5,R11,R1 \ LSR.1 R0,15,R3 + SUBB.0 R6,0,R2 \ LSR.1 R1,15,R6 + + // if (carry) goto shiftOnly + SUB.0 R8,1,R8 \ BNE shiftOnly +=-> LSR.0 R4,15,R7 \ LSL.1 R1,1,R9 + + OR.0 [LSL R0,1],1,R4 \ BNE loopStart +=-> SUB.0 R4,R10,R0 \ OR.1 R9,R3,R5 + + BRA loopEnd + +shiftOnly: + + OR.0 [LSL R5,1],R7,R5 \ BNE loopStart \ LSR.1 R5,15,R6 +=-> SUB.0 [LSL R4,1],R10,R0 \LSL.1 R4,1,R4 + +// End of loop +loopEnd: + + // Schedule the computation of the upper word after shifting + // alongside the decision over whether to branch, and the register + // restores. + // R10 is filled with a useful constant. + SUB.0 15,r14,r15 \ LDL (FP)4,R[13:12] + SUB.1 0,R14,R1 // Don't set flags! + LSL.0 R6,R1,R3 \ LDL (FP)-4,R[9:8] + + BLT remainderHasMoreThan16Bits \ LSR.0 R5,R14,R7 \ COPY.1 -1,R10 +=-> LSL.0 R5,R1,R2 \ OR.1 R7,R3,R3 + + LSR.0 R4,R14,R3 \ COPY.1 R3,R7 + BRA epilogue \ LSR.0 -1,R1,R0 \ COPY.1 0,R5 +=-> OR.0 R3,R2,R6 \ AND.1 R0,R4,R4 + +remainderHasMoreThan16Bits: + + LSL.0 R10,R14,R1 \ COPY.1 R3,R6 + XOR.0 R10,R1,R1 \ COPY.1 0,R7 + AND.0 R1,R5,R5 + +epilogue: + + JR (R12) \ LDW (FP)-4,R14 +=-> LDL (FP)-3,R[11:10] + +_picoMark_FUNCTION_END= + +// picoChip Function Epilogue : udivmodsi4 + +//============================================================================ +// All DWARF information between this marker, and the END OF DWARF +// marker should be included in the source file. Search for +// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and +// provide the relevent information. Add markers called +// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the +// function in question. +//============================================================================ + +//============================================================================ +// Frame information. +//============================================================================ + +.section .debug_frame +_picoMark_DebugFrame= + +// Common CIE header. +.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin +_picoMark_CieBegin= +.unalignedInitLong 0xffffffff +.initByte 0x1 // CIE Version +.ascii 16#0# // CIE Augmentation +.uleb128 0x1 // CIE Code Alignment Factor +.sleb128 2 // CIE Data Alignment Factor +.initByte 0xc // CIE RA Column +.initByte 0xc // DW_CFA_def_cfa +.uleb128 0xd +.uleb128 0x0 +.align 2 +_picoMark_CieEnd= + +// FDE +_picoMark_LSFDE0I900821033007563= +.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin +_picoMark_FdeBegin= +.unalignedInitLong _picoMark_DebugFrame // FDE CIE offset +.unalignedInitWord _picoMark_FUNCTION_BEGIN // FDE initial location +.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x18 // <-- FUNCTION_STACK_SIZE_GOES_HERE +.initByte 0x4 // DW_CFA_advance_loc4 +.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN +.initByte 0xe // DW_CFA_def_cfa_offset +.uleb128 0x0 +.align 2 +_picoMark_FdeEnd= + +//============================================================================ +// Abbrevation information. +//============================================================================ + +.section .debug_abbrev +_picoMark_ABBREVIATIONS= + +.section .debug_abbrev + .uleb128 0x1 // (abbrev code) + .uleb128 0x11 // (TAG: DW_TAG_compile_unit) + .initByte 0x1 // DW_children_yes + .uleb128 0x10 // (DW_AT_stmt_list) + .uleb128 0x6 // (DW_FORM_data4) + .uleb128 0x12 // (DW_AT_high_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x11 // (DW_AT_low_pc) + .uleb128 0x1 // (DW_FORM_addr) + .uleb128 0x25 // (DW_AT_producer) + .uleb128 0x8 // (DW_FORM_string) + .uleb128 0x13 // (DW_AT_language) + .uleb128 0x5 // (DW_FORM_data2) + .uleb128 0x3 // (DW_AT_name) + .uleb128 0x8 // (DW_FORM_string) +.initByte 0x0 +.initByte 0x0 + + .uleb128 0x2 ;# (abbrev code) + .uleb128 0x2e ;# (TAG: DW_TAG_subprogram) +.initByte 0x0 ;# DW_children_no + .uleb128 0x3 ;# (DW_AT_name) + .uleb128 0x8 ;# (DW_FORM_string) + .uleb128 0x11 ;# (DW_AT_low_pc) + .uleb128 0x1 ;# (DW_FORM_addr) + .uleb128 0x12 ;# (DW_AT_high_pc) + .uleb128 0x1 ;# (DW_FORM_addr) +.initByte 0x0 +.initByte 0x0 + +.initByte 0x0 + +//============================================================================ +// Line information. DwarfLib requires this to be present, but it can +// be empty. +//============================================================================ + +.section .debug_line +_picoMark_LINES= + +//============================================================================ +// Debug Information +//============================================================================ +.section .debug_info + +//Fixed header. +.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN +_picoMark_DEBUG_INFO_BEGIN= +.unalignedInitWord 0x2 +.unalignedInitLong _picoMark_ABBREVIATIONS +.initByte 0x2 + +// Compile unit information. +.uleb128 0x1 // (DIE 0xb) DW_TAG_compile_unit) +.unalignedInitLong _picoMark_LINES +.unalignedInitWord _picoMark_FUNCTION_END +.unalignedInitWord _picoMark_FUNCTION_BEGIN +// Producer is `picoChip' +.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00# +.unalignedInitWord 0xcafe // ASM language +.ascii 16#0# // Name. DwarfLib expects this to be present. + +.uleb128 0x2 ;# (DIE DW_TAG_subprogram) + +// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex +// digit is specified using the format 16#XX# +.ascii 16#5f# 16#75# 16#64# 16#69# 16#76# 16#6d# 16#6f# 16#64# 16#73# 16#69# 16#34# 16#0# // Function name `_udivmodsi4' +.unalignedInitWord _picoMark_FUNCTION_BEGIN // DW_AT_low_pc +.unalignedInitWord _picoMark_FUNCTION_END // DW_AT_high_pc + +.initByte 0x0 // end of compile unit children. + +_picoMark_DEBUG_INFO_END= + +//============================================================================ +// END OF DWARF +//============================================================================ +.section .endFile +// End of picoChip ASM file diff --git a/config/picochip/picochip-protos.h b/config/picochip/picochip-protos.h new file mode 100644 index 0000000..9b2c824 --- /dev/null +++ b/config/picochip/picochip-protos.h @@ -0,0 +1,140 @@ +/* Prototypes for exported functions defined in picochip.c + + Copyright (C) 2000, 2001, 2008 Free Software Foundation, Inc. + Contributed by picoChip Designs Ltd. (http://www.picochip.com) + Maintained by Daniel Towner (daniel.towner@picochip.com) and + Hariharan Sandanagobalane (hariharan@picochip.com). + + This file is part of GCC. + + GCC is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3, or (at your option) + any later version. + + GCC is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with GCC; see the file COPYING3. If not, see + . */ + +#include "target.h" +extern void picochip_function_prologue (FILE *, HOST_WIDE_INT); +extern void picochip_function_epilogue (FILE *, HOST_WIDE_INT); + +extern enum reg_class picochip_reg_class_from_letter (unsigned); +extern int picochip_legitimate_address_p (int, struct rtx_def *, unsigned); +extern int picochip_const_ok_for_letter_p (unsigned HOST_WIDE_INT value, unsigned c); + +#ifdef RTX_CODE /* inside TREE_CODE */ + +extern int picochip_reg_mode_ok_for_base_p (int mode, rtx x, unsigned strict); +extern void picochip_print_operand (FILE * file, rtx op, int letter); +extern void picochip_print_operand_address (FILE * file, rtx operand); + +extern const char *picochip_output_cbranch (rtx operands[]); +extern const char *picochip_output_branch (rtx operands[], rtx insn); +extern const char *picochip_output_compare (rtx operands[]); +extern const char *picochip_output_jump (rtx insn); + +extern const char *picochip_output_put_array (int alternative, + rtx operands[]); +extern const char *picochip_output_get_array (int alternative, + rtx operands[]); +extern const char *picochip_output_testport_array (int alternative, + rtx operands[]); + +extern rtx gen_SImode_mem(rtx opnd1,rtx opnd2); +extern bool ok_to_peephole_stw(rtx opnd0, rtx opnd1, rtx opnd2, rtx opnd3); +extern bool ok_to_peephole_ldw(rtx opnd0, rtx opnd1, rtx opnd2, rtx opnd3); + +extern rtx gen_min_reg(rtx opnd1,rtx opnd2); + +extern rtx picochip_function_arg (CUMULATIVE_ARGS cum, int mode, tree type, + int named); + +extern rtx picochip_incoming_function_arg (CUMULATIVE_ARGS, int, tree, int); +extern CUMULATIVE_ARGS picochip_arg_advance (CUMULATIVE_ARGS cum, int mode, + tree type, int named); + +extern int picochip_regno_nregs (int regno, int mode); +extern int picochip_class_max_nregs (int class, int mode); + +extern void picochip_order_regs_for_local_alloc (void); + +extern int picochip_word_aligned_memory_reference (rtx operand); +extern int picochip_alignable_memory_operand (rtx operand, enum machine_mode mode); +extern int picochip_absolute_memory_operand (rtx op, enum machine_mode mode); + +extern rtx picochip_function_value (const_tree valtype, const_tree func, bool outgoing); +extern int picochip_symbol_offset (rtx operand); + +extern int picochip_get_function_arg_boundary (enum machine_mode mode); + +extern enum reg_class picochip_secondary_reload(bool in_p, + rtx x, + enum reg_class cla, + enum machine_mode mode, + secondary_reload_info *sri); + +extern void picochip_get_hi_aligned_mem (rtx ref, rtx * paligned_mem, rtx * pbitnum); + +extern rtx picochip_get_low_const (rtx value); +extern rtx picochip_get_high_const (rtx value); + +extern void picochip_expand_prologue (void); +extern void picochip_expand_epilogue (int is_sibling_call); + +extern void picochip_final_prescan_insn (rtx insn, rtx * operand, int num_operands); +extern const char *picochip_asm_output_opcode (FILE * f, const char *ptr); +extern void picochip_override_options (void); + +extern int picochip_check_conditional_copy (rtx * operands); + +extern rtx picochip_return_addr_rtx(int count, rtx frameaddr); +extern rtx picochip_struct_value_rtx(tree fntype ATTRIBUTE_UNUSED, + int incoming ATTRIBUTE_UNUSED); + +#endif /* RTX_CODE inside TREE_CODE */ + +void picochip_output_ascii (FILE * file, const char *str, int length); + +extern int picochip_hard_regno_mode_ok (int regno, enum machine_mode mode); +extern void picochip_generate_internal_label (char *str, const char *prefix, + long num); + +extern bool picochip_return_in_memory(const_tree type, + const_tree fntype ATTRIBUTE_UNUSED); + +extern int initial_elimination_offset (int from, int to); + +extern void picochip_output_aligned_common (FILE * stream, const char *name, + unsigned size, unsigned align); + +extern void picochip_output_global (FILE * stream, const char *name); + +extern void picochip_output_aligned_local (FILE * stream, const char *name, + unsigned size, unsigned alignment); + +extern void picochip_output_label (FILE * stream, const char name[]); +extern void picochip_output_labelref (FILE * stream, const char name[]); +extern void picochip_weaken_label (FILE * stream, const char name[]); +extern void picochip_output_internal_label (FILE * stream, const char *prefix, + unsigned long num); + +extern void warn_of_byte_access (void); + +/* True if VLIW scheduling is enabled (i.e., second scheduling pass). */ +extern int picochip_flag_schedule_insns2; + +extern void picochip_asm_output_anchor (rtx symbol); + +/* Instruction set capability flags. These are initialised to the + appropriate values by picochip_override_options, once the user has + selected a CPU type. */ +extern bool picochip_has_mul_unit; +extern bool picochip_has_mac_unit; + diff --git a/config/picochip/picochip.c b/config/picochip/picochip.c new file mode 100644 index 0000000..48f877c --- /dev/null +++ b/config/picochip/picochip.c @@ -0,0 +1,4421 @@ +/* Subroutines used for code generation on picoChip processors. + Copyright (C) 2001,2008 Free Software Foundation, Inc. + Contributed by picoChip Designs Ltd. (http://www.picochip.com) + Maintained by Daniel Towner (daniel.towner@picochip.com) and + Hariharan Sandanagobalane (hariharan@picochip.com) + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 3, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING3. If not, see +. */ + +#include "config.h" +#include "system.h" +#include "coretypes.h" +#include "tm.h" +#include "rtl.h" +#include "regs.h" +#include "hard-reg-set.h" +#include "real.h" +#include "insn-config.h" +#include "conditions.h" +#include "insn-attr.h" +#include "flags.h" +#include "recog.h" +#include "obstack.h" +#include "tree.h" +#include "expr.h" +#include "optabs.h" +#include "except.h" +#include "function.h" +#include "output.h" +#include "basic-block.h" +#include "integrate.h" +#include "toplev.h" +#include "ggc.h" +#include "hashtab.h" +#include "tm_p.h" +#include "target.h" +#include "target-def.h" +#include "langhooks.h" +#include "reload.h" +#include "tree-gimple.h" + +#include "picochip-protos.h" + +#include "insn-attr.h" /* For DFA state_t. */ +#include "insn-config.h" /* Required by recog.h */ +#include "insn-codes.h" /* For CODE_FOR_? */ +#include "optabs.h" /* For GEN_FCN */ +#include "basic-block.h" /* UPDATE_LIFE_GLOBAL* for picochip_reorg. */ +#include "timevar.h" /* For TV_SCHED2, in picochip_reorg. */ +#include "libfuncs.h" /* For memcpy_libfuncs, etc. */ +#include "df.h" /* For df_regs_ever_live_df_regs_ever_live_pp, etc. */ + + +/* Target AE ISA information. */ +enum picochip_dfa_type picochip_schedule_type; + +bool picochip_has_mul_unit = false; +bool picochip_has_mac_unit = false; + +/* targetm hook function prototypes. */ + +void picochip_asm_file_start (void); +void picochip_asm_file_end (void); + +void picochip_init_libfuncs (void); +void picochip_reorg (void); + +int picochip_arg_partial_bytes (CUMULATIVE_ARGS * p_cum, + enum machine_mode mode, + tree type, bool named); + +int picochip_sched_lookahead (void); +int picochip_sched_issue_rate (void); +int picochip_sched_adjust_cost (rtx insn, rtx link, + rtx dep_insn, int cost); +int picochip_sched_reorder (FILE * file, int verbose, rtx * ready, + int *n_readyp, int clock); + +void picochip_init_builtins (void); +rtx picochip_expand_builtin (tree, rtx, rtx, enum machine_mode, int); + +bool picochip_rtx_costs (rtx x, int code, int outer_code, int* total); +bool picochip_return_in_memory(const_tree type, + const_tree fntype ATTRIBUTE_UNUSED); + +rtx picochip_struct_value_rtx(tree fntype ATTRIBUTE_UNUSED, int incoming ATTRIBUTE_UNUSED); +rtx picochip_function_value (const_tree valtype, const_tree func ATTRIBUTE_UNUSED, + bool outgoing ATTRIBUTE_UNUSED); +enum reg_class +picochip_secondary_reload (bool in_p, + rtx x ATTRIBUTE_UNUSED, + enum reg_class cla ATTRIBUTE_UNUSED, + enum machine_mode mode, + secondary_reload_info *sri); +void +picochip_asm_named_section (const char *name, + unsigned int flags ATTRIBUTE_UNUSED, + tree decl ATTRIBUTE_UNUSED); + +/* Lookup table mapping a register number to the earliest containing + class. Used by REGNO_REG_CLASS. */ +const enum reg_class picochip_regno_reg_class[FIRST_PSEUDO_REGISTER] = +{ + TWIN_REGS, TWIN_REGS, TWIN_REGS, TWIN_REGS, + TWIN_REGS, TWIN_REGS, TWIN_REGS, TWIN_REGS, + TWIN_REGS, TWIN_REGS, TWIN_REGS, TWIN_REGS, + GR_REGS, FRAME_REGS, PTR_REGS, CONST_REGS, + ACC_REGS, CC_REGS, GR_REGS, GR_REGS +}; + +/* picoChip register names. */ +const char *picochip_regnames[] = REGISTER_NAMES; + +/* Define the maximum number of registers which may be used to pass + * parameters to functions. */ +#define MAX_CALL_PARAMETER_REGS 6 + + +/* Target scheduling information. */ + +/* Determine whether we run our final scheduling pass or not. We always + avoid the normal second scheduling pass. */ +int picochip_flag_schedule_insns2; + +/* Check if variable tracking needs to be run. */ +int picochip_flag_var_tracking; + +/* This flag indicates whether the next instruction to be output is a + VLIW continuation instruction. It is used to communicate between + final_prescan_insn and asm_output_opcode. */ +static int picochip_vliw_continuation = 0; + +/* This variable is used to communicate the current instruction + between final_prescan_insn and functions such as asm_output_opcode, + and picochip_get_vliw_alu_id (which are otherwise unable to determine the + current instruction. */ +static rtx picochip_current_prescan_insn; + +static bool picochip_is_delay_slot_pending = 0; + +/* When final_prescan_insn is called, it computes information about + the current VLIW packet, and stores it in this structure. When + instructions are output, this state is used to make sure that the + instructions are output in the correct way (e.g., which ALU to use, + whether a macro branch was ever previously a real branch, etc.). */ +struct vliw_state +{ + int contains_pico_alu_insn; + int contains_non_cc_alu_insn; + int num_alu_insns_so_far; + + /* Record how many instructions are contained in the packet. */ + int num_insns_in_packet; + + /* There was a case for this to be more than 1 */ + int num_cfi_labels_deferred; + char cfi_label_name[2][256]; /* Used to record the name of a CFI label + emitted inside a VLIW packet. */ + char lm_label_name[256]; /* Used to record the name of an LM label. */ +}; + +struct vliw_state picochip_current_vliw_state; + +/* Save/restore recog_data. */ +static int picochip_saved_which_alternative; +static struct recog_data picochip_saved_recog_data; + +/* Determine which ALU to use for the instruction in + picochip_current_prescan_insn. */ +static char picochip_get_vliw_alu_id (void); + +/* Initialize the GCC target structure. */ + +#undef TARGET_ASM_FUNCTION_PROLOGUE +#define TARGET_ASM_FUNCTION_PROLOGUE picochip_function_prologue + +#undef TARGET_ASM_FUNCTION_EPILOGUE +#define TARGET_ASM_FUNCTION_EPILOGUE picochip_function_epilogue + +#undef TARGET_ASM_INTERNAL_LABEL +#define TARGET_ASM_INTERNAL_LABEL picochip_output_internal_label + +#undef TARGET_ASM_GLOBALIZE_LABEL +#define TARGET_ASM_GLOBALIZE_LABEL picochip_output_global + +#undef TARGET_ASM_BYTE_OP +#define TARGET_ASM_BYTE_OP ".initByte " +#undef TARGET_ASM_ALIGNED_HI_OP +#define TARGET_ASM_ALIGNED_HI_OP ".initWord " +#undef TARGET_ASM_UNALIGNED_HI_OP +#define TARGET_ASM_UNALIGNED_HI_OP ".unalignedInitWord " +#undef TARGET_ASM_ALIGNED_SI_OP +#define TARGET_ASM_ALIGNED_SI_OP ".initLong " +#undef TARGET_ASM_UNALIGNED_SI_OP +#define TARGET_ASM_UNALIGNED_SI_OP ".unalignedInitLong " + +#undef TARGET_INIT_BUILTINS +#define TARGET_INIT_BUILTINS picochip_init_builtins + +#undef TARGET_EXPAND_BUILTIN +#define TARGET_EXPAND_BUILTIN picochip_expand_builtin + +#undef TARGET_RTX_COSTS +#define TARGET_RTX_COSTS picochip_rtx_costs + +#undef TARGET_SCHED_ISSUE_RATE +#define TARGET_SCHED_ISSUE_RATE picochip_sched_issue_rate + +#undef TARGET_SCHED_REORDER +#define TARGET_SCHED_REORDER picochip_sched_reorder + +#undef TARGET_SCHED_FIRST_CYCLE_MULTIPASS_DFA_LOOKAHEAD +#define TARGET_SCHED_FIRST_CYCLE_MULTIPASS_DFA_LOOKAHEAD \ + picochip_sched_lookahead + +#undef TARGET_SCHED_ADJUST_COST +#define TARGET_SCHED_ADJUST_COST picochip_sched_adjust_cost + +#undef TARGET_ASM_NAMED_SECTION +#define TARGET_ASM_NAMED_SECTION picochip_asm_named_section + +#undef TARGET_HAVE_NAMED_SECTIONS +#define TARGET_HAVE_NAMED_SECTIONS 1 + +#undef TARGET_HAVE_SWITCHABLE_BSS_SECTIONS +#define TARGET_HAVE_SWITCHABLE_BSS_SECTIONS 1 + +#undef TARGET_INIT_LIBFUNCS +#define TARGET_INIT_LIBFUNCS picochip_init_libfuncs + +#undef TARGET_ASM_FILE_START +#define TARGET_ASM_FILE_START picochip_asm_file_start + +#undef TARGET_ASM_FILE_END +#define TARGET_ASM_FILE_END picochip_asm_file_end + +#undef TARGET_MACHINE_DEPENDENT_REORG +#define TARGET_MACHINE_DEPENDENT_REORG picochip_reorg + +#undef TARGET_ARG_PARTIAL_BYTES +#define TARGET_ARG_PARTIAL_BYTES picochip_arg_partial_bytes + +#undef TARGET_PROMOTE_FUNCTION_ARGS +#define TARGET_PROMOTE_FUNCTION_ARGS hook_bool_const_tree_true +#undef TARGET_PROMOTE_FUNCTION_RETURN +#define TARGET_PROMOTE_FUNCTION_RETURN hook_bool_const_tree_true +#undef TARGET_PROMOTE_PROTOTYPES +#define TARGET_PROMOTE_PROTOTYPES hook_bool_const_tree_true + +/* Target support for Anchored Addresses optimization */ +#undef TARGET_MIN_ANCHOR_OFFSET +#define TARGET_MIN_ANCHOR_OFFSET 0 +#undef TARGET_MAX_ANCHOR_OFFSET +#define TARGET_MAX_ANCHOR_OFFSET 7 +#undef TARGET_ASM_OUTPUT_ANCHOR +#define TARGET_ASM_OUTPUT_ANCHOR picochip_asm_output_anchor + +#undef TARGET_FUNCTION_VALUE +#define TARGET_FUNCTION_VALUE picochip_function_value +/* +#undef TARGET_LIBGCC_CMP_RETURN_MODE +#define TARGET_LIBGCC_CMP_RETURN_MODE picochip_libgcc_cmp_return_mode +*/ + +/* Loading and storing QImode values to and from memory + usually requires a scratch register. */ +#undef TARGET_SECONDARY_RELOAD +#define TARGET_SECONDARY_RELOAD picochip_secondary_reload +#undef DONT_USE_BUILTIN_SETJMP +#define DONT_USE_BUILTIN_SETJMP 1 + +/* How Large Values are Returned */ + +#undef TARGET_RETURN_IN_MEMORY +#define TARGET_RETURN_IN_MEMORY picochip_return_in_memory + +struct gcc_target targetm = TARGET_INITIALIZER; + + +/* Only return a value in memory if it is greater than 4 bytes. + int_size_in_bytes returns -1 for variable size objects, which go in + memory always. The cast to unsigned makes -1 > 8. */ + +bool +picochip_return_in_memory(const_tree type, const_tree fntype ATTRIBUTE_UNUSED) +{ + return ((unsigned HOST_WIDE_INT) int_size_in_bytes (type) > 4); +} + +/* Allow certain command options to be overriden. */ +void +picochip_override_options (void) +{ + + /* Turn off the elimination of unused types. The elaborator + generates various interesting types to represent constants, + generics, and so on, and it is useful to retain this information + in the debug output. The increased size of the debug information + is not really an issue for us. */ + flag_eliminate_unused_debug_types = 0; + + /* Even if the user specifies a -fno-omit-frame-pointer on the + command line, we still want to go ahead and omit frame pointer + usages, since we dont really have a frame pointer register. + So, all accesses to FP need to be converted to accesses off + stack pointer.*/ + flag_omit_frame_pointer = 1; + + /* Turning on anchored addresses by default. This is an optimization + that could decrease the code size by placing anchors in data and + accessing offsets from the anchor for file local data variables. + This isnt the default at O2 as yet. */ + flag_section_anchors = 1; + + /* Turn off the second scheduling pass, and move it to + picochip_reorg, to avoid having the second jump optimisation + trash the instruction modes (e.g., instructions are changed to + TImode to mark the beginning of cycles). Two types of DFA + scheduling are possible: space and speed. In both cases, + instructions are reordered to avoid stalls (e.g., memory loads + stall for one cycle). Speed scheduling will also enable VLIW + instruction packing. VLIW instructions use more code space, so + VLIW scheduling is disabled when scheduling for size. */ + picochip_flag_schedule_insns2 = flag_schedule_insns_after_reload; + flag_schedule_insns_after_reload = 0; + if (picochip_flag_schedule_insns2) + { + + if (optimize_size) + picochip_schedule_type = DFA_TYPE_SPACE; + else + { + picochip_schedule_type = DFA_TYPE_SPEED; + flag_delayed_branch = 0; + } + + } + else + picochip_schedule_type = DFA_TYPE_NONE; + + /* Ensure that the debug level is always at least -g2. The flow + analyser works at its best if it always has debug + information. DWARF is non-intrusive, so it makes no difference to + code quality if debug is always enabled. */ + if (debug_info_level < DINFO_LEVEL_NORMAL) + { + debug_info_level = DINFO_LEVEL_NORMAL; + write_symbols = DWARF2_DEBUG; + } + + /* Options of the form -mae=mac, and so on will be substituted by + the compiler driver for the appropriate byte access and multiply + unit ISA options. Any unrecognised AE types will end up being + passed to the compiler, which should reject them as invalid. */ + if (picochip_ae_type_string != NULL) + error ("invalid AE type specified (%s)\n", picochip_ae_type_string); + + /* Override any specific capabilities of the instruction set. These + take precedence over any capabilities inferred from the AE type, + regardless of where the options appear on the command line. */ + if (picochip_mul_type_string == NULL) + { + /* Default to MEM-type multiply, for historical compatibility. */ + picochip_has_mac_unit = false; + picochip_has_mul_unit = true; + } + else + { + picochip_has_mac_unit = false; + picochip_has_mul_unit = false; + + if (strcmp (picochip_mul_type_string, "mul") == 0) + picochip_has_mul_unit = true; + else if (strcmp (picochip_mul_type_string, "mac") == 0) + picochip_has_mac_unit = true; + else if (strcmp (picochip_mul_type_string, "none") == 0) + { /* Do nothing. Unit types already set to false. */ } + else + error ("Invalid mul type specified (%s) - expected mac, mul or none", + picochip_mul_type_string); + } + +} + + +/* Initialise the library functions to handle arithmetic on some of + the larger modes. */ +void +picochip_init_libfuncs (void) +{ + /* 64-bit shifts */ + set_optab_libfunc (ashr_optab, DImode, "__ashrdi3"); + set_optab_libfunc (ashl_optab, DImode, "__ashldi3"); + set_optab_libfunc (lshr_optab, DImode, "__lshrdi3"); + + /* 64-bit signed multiplication. */ + set_optab_libfunc (smul_optab, DImode, "__muldi3"); + + /* Signed division */ + set_optab_libfunc (sdiv_optab, HImode, "__divhi3"); + set_optab_libfunc (sdiv_optab, DImode, "__divdi3"); + + /* Signed modulus */ + set_optab_libfunc (smod_optab, HImode, "__modhi3"); + set_optab_libfunc (smod_optab, DImode, "__moddi3"); + + /* 32-bit count leading Zeros*/ + set_optab_libfunc (clz_optab, SImode, "_clzsi2"); + + /* 64-bit comparison */ + set_optab_libfunc (ucmp_optab, DImode, "__ucmpdi2"); + set_optab_libfunc (cmp_optab, DImode, "__cmpdi2"); + + /* 64-bit addition and subtraction*/ + set_optab_libfunc (add_optab, DImode, "_adddi3"); + set_optab_libfunc (sub_optab, DImode, "_subdi3"); +} + +/* Return the register class for letter C. */ +enum reg_class +picochip_reg_class_from_letter (unsigned c) +{ + switch (c) + { + case 'k': + return FRAME_REGS; + case 'f': + return PTR_REGS; + case 't': + return TWIN_REGS; + case 'r': + return GR_REGS; + default: + return NO_REGS; + } +} + +static const int +pico_leaf_reg_alloc_order[] = LEAF_REG_ALLOC_ORDER; +static const int +pico_nonleaf_reg_alloc_order[] = REG_ALLOC_ORDER; + +void +picochip_order_regs_for_local_alloc (void) +{ + /* We change the order for leaf functions alone. We put r12 at + the end since using it will prevent us to combine stw/ldws to + stl/ldl and it gives no benefit. In non-leaf functions, we + would anyway saveup/restore r12, so it makes sense to use it.*/ + + if (leaf_function_p()) + { + memcpy ((char *)reg_alloc_order, (const char *) pico_leaf_reg_alloc_order, + FIRST_PSEUDO_REGISTER * sizeof (int)); + } + else + { + memcpy ((char *)reg_alloc_order, (const char *) pico_nonleaf_reg_alloc_order, + FIRST_PSEUDO_REGISTER * sizeof (int)); + } +} + +/* Check that VALUE (an INT_CST) is ok as a constant of type C. */ +int +picochip_const_ok_for_letter_p (unsigned HOST_WIDE_INT value, unsigned c) +{ + + switch (c) + { + case 'I': /* 4 bits signed. */ + return value + 8 < 16; + case 'J': /* 4 bits unsigned. */ + return value < 16; + case 'K': /* 8 bits signed. */ + return value + 128 < 256; + case 'M': /* 4-bit magnitude. */ + return abs (value) < 16; + case 'N': /* 10 bits signed. */ + return value + 512 > 1024; + case 'O': /* 16 bits signed. */ + return value + 32768 < 65536; + default: /* Unknown letter. */ + return 0; + } +} + +/* Stack utility functions. */ +rtx +picochip_return_addr_rtx(int count, rtx frameaddr ATTRIBUTE_UNUSED) +{ + if (count==0) + return gen_rtx_REG (Pmode, LINK_REGNUM); + else + return NULL_RTX; +} + + +/* Emit a set of parallel register expressions used to store + blockmode values to pass to functions. */ +static rtx +picochip_emit_register_parallel (int size_in_units, int offset) +{ + int num_regs = 0; + rtx result; + rtx vector[MAX_CALL_PARAMETER_REGS]; + int base_reg = 0; + int i = 0; + + /* Compute the base register, and number of required registers. */ + base_reg = offset / 2; + num_regs = size_in_units / 2; + if (size_in_units % 2 == 1) + num_regs++; + + /* Emit a register for each part of the block mode value to be + passed in a register. */ + for (i = 0; i < num_regs; i++) + vector[i] = gen_rtx_EXPR_LIST (VOIDmode, + gen_rtx_REG (HImode, base_reg + i), + GEN_INT (i * 2)); + result = gen_rtx_PARALLEL (BLKmode, gen_rtvec_v (num_regs, vector)); + + return result; + +} + +/* Emit an instruction to allocate a suitable amount of space on the + stack, by decrementing the stack pointer. */ +static void +picochip_emit_stack_allocate (int adjustment) +{ + rtx insn; + rtx stack_pointer_reg = gen_rtx_REG (Pmode, STACK_POINTER_REGNUM); + + /* Use an addition of a negative value. */ + insn = emit_insn (gen_addhi3 (stack_pointer_reg, stack_pointer_reg, + GEN_INT (-adjustment))); + + /* Make the instruction frame related. Also add an expression note, + so that the correct Dwarf information is generated (see documention + for RTX_FRAME_RELATED_P for more details). */ + RTX_FRAME_RELATED_P (insn) = 1; + REG_NOTES (insn) = + gen_rtx_EXPR_LIST (REG_FRAME_RELATED_EXPR, + gen_rtx_SET (VOIDmode, stack_pointer_reg, + gen_rtx_PLUS (Pmode, stack_pointer_reg, + GEN_INT (-adjustment))), + REG_NOTES (insn)); + +} + +/* Emit an instruction to save a register of the given mode. The + offset at which to save the register is given relative to the stack + pointer. */ +static void +picochip_emit_save_register (rtx reg, int offset) +{ + rtx stack_pointer, address, mem, insn; + + stack_pointer = gen_rtx_REG (Pmode, STACK_POINTER_REGNUM); + + address = gen_rtx_PLUS (Pmode, stack_pointer, GEN_INT (offset)); + + mem = gen_rtx_MEM (GET_MODE (reg), address); + + insn = emit_move_insn (mem, reg); + RTX_FRAME_RELATED_P (insn) = 1; + + /* For modes other than HImode, create a note explaining that + multiple registers have been saved. This allows the correct DWARF + call frame information to be generated. */ + switch (GET_MODE (reg)) + { + case HImode: + /* The RTL is sufficient to explain HImode register saves. */ + break; + + case SImode: + /* SImode must be broken down into parallel HImode register saves. */ + { + rtvec p; + p = rtvec_alloc (2); + + RTVEC_ELT (p, 0) = + gen_rtx_SET (HImode, + gen_rtx_MEM (HImode, + gen_rtx_PLUS (Pmode, stack_pointer, + GEN_INT (offset))), + gen_rtx_REG (HImode, REGNO (reg))); + RTX_FRAME_RELATED_P (RTVEC_ELT (p, 0)) = 1; + + RTVEC_ELT (p, 1) = + gen_rtx_SET (HImode, gen_rtx_MEM (HImode, + gen_rtx_PLUS (Pmode, + stack_pointer, + GEN_INT (offset + + 2))), + gen_rtx_REG (HImode, REGNO (reg) + 1)); + RTX_FRAME_RELATED_P (RTVEC_ELT (p, 1)) = 1; + + REG_NOTES (insn) = + gen_rtx_EXPR_LIST (REG_FRAME_RELATED_EXPR, + gen_rtx_PARALLEL (VOIDmode, p), + REG_NOTES (insn)); + + } + break; + + default: + internal_error + ("unexpected mode %s encountered in picochip_emit_save_register\n", + GET_MODE_NAME (GET_MODE (reg))); + } + +} + +/* Emit an instruction to restore a register of the given mode. The + offset from which to restore the register is given relative to the + stack pointer. */ +static void +picochip_emit_restore_register (rtx reg, int offset) +{ + rtx stack_pointer, address, mem, insn; + + stack_pointer = gen_rtx_REG (Pmode, STACK_POINTER_REGNUM); + + address = gen_rtx_PLUS (Pmode, stack_pointer, GEN_INT (offset)); + + mem = gen_rtx_MEM (GET_MODE (reg), address); + + insn = emit_move_insn (reg, mem); + +} + +/* Check that the given byte offset is aligned to the given number of + bits. */ +static int +picochip_is_aligned (int byte_offset, int bit_alignment) +{ + int byte_alignment = bit_alignment / BITS_PER_UNIT; + return (byte_offset % byte_alignment) == 0; +} + +/***************************************************************************** + * Stack layout. + * + * The following section contains code which controls how the stack is + * laid out. + * + * The stack is laid out as follows (high addresses first): + * + * Incoming arguments + * Pretend arguments (ARG PTR) + * Special registers + * General registers + * Frame (FP) + * Outgoing arguments (SP) + * + * The (constant) offsets of the different areas must be calculated + * relative to the stack area immediately below, and aligned + * appropriately. For example, the frame offset is computed by + * determining the offset of the special register area, adding the + * size of the special register area, and then aligning the resulting + * offset correctly. In turn, the special register offset is computed + * from the general register offset, and so on. This enables the + * different offsets to change size and alignment, without requiring + * the code for other offset calculations to be rewritten. + * + * The argument pointer, and the frame pointer are eliminated wherever + * possible, by replacing them with a constant offset from the stack + * pointer. In the rare cases where constant offsets from the stack + * pointer cannot be computed, another register will be allocated to + * serve as the argument pointer, or the frame pointer. + * + * The save registers are stored at small offsets from the caller, to + * enable the more efficient SP-based ISA instructions to be used. + * + ****************************************************************************/ + +/* Compute the size of an argument in units. */ +static int +picochip_compute_arg_size (tree type, enum machine_mode mode) +{ + int type_size_in_units = 0; + + if (type) + type_size_in_units = tree_low_cst (TYPE_SIZE_UNIT (type), 1); + else + type_size_in_units = GET_MODE_SIZE (mode); + + return type_size_in_units; + +} + +/* Determine where the next outgoing arg should be placed. */ +rtx +picochip_function_arg (CUMULATIVE_ARGS cum, int mode, tree type, + int named ATTRIBUTE_UNUSED) +{ + int reg = 0; + int type_align_in_units = 0; + int type_size_in_units; + int new_offset = 0; + int offset_overflow = 0; + + /* VOIDmode is passed when computing the second argument to a `call' + pattern. This can be ignored. */ + if (mode == VOIDmode) + return 0; + + /* Compute the alignment and size of the parameter. */ + type_align_in_units = + picochip_get_function_arg_boundary (mode) / BITS_PER_UNIT; + type_size_in_units = picochip_compute_arg_size (type, mode); + + /* Compute the correct offset (i.e., ensure that the offset meets + the alignment requirements). */ + offset_overflow = cum % type_align_in_units; + if (offset_overflow == 0) + new_offset = cum; + else + new_offset = (cum - offset_overflow) + type_align_in_units; + + if (TARGET_DEBUG) + { + printf ("Function arg:\n"); + printf (" Type valid: %s\n", (type ? "yes" : "no")); + printf (" Cumulative Value: %d\n", cum); + printf (" Mode: %s\n", GET_MODE_NAME (mode)); + printf (" Type size: %i units\n", type_size_in_units); + printf (" Alignment: %i units\n", type_align_in_units); + printf (" New offset: %i\n", new_offset); + printf ("\n"); + } + + /* If the new offset is outside the register space, return. */ + if (new_offset >= MAX_CALL_PARAMETER_REGS * 2) + return 0; + + /* If the end of the argument is outside the register space, then + the argument must overlap the register space. Return the first + available register. */ + if ((new_offset + type_size_in_units) > (MAX_CALL_PARAMETER_REGS * 2)) + return gen_rtx_REG (HImode, new_offset / 2); + + /* Create a register of the required mode to hold the parameter. */ + reg = new_offset / 2; + switch (mode) + { + case QImode: + case HImode: + case SImode: + case SFmode: + case DImode: + case DFmode: + case SDmode: + case DDmode: + case CHImode: + case CSImode: + case SCmode: + case CQImode: + return gen_rtx_REG ((enum machine_mode) mode, reg); + + case BLKmode: + { + /* Empty blockmode values can be passed as arguments (e.g., + * empty structs). These require no registers + * whatsoever. Non-empty blockmode values are passed in a set + * of parallel registers. */ + if (type_size_in_units == 0) + return 0; + else + return picochip_emit_register_parallel (type_size_in_units, new_offset); + } + + default: + warning + (0, "Defaulting to stack for %s register creation\n", + GET_MODE_NAME (mode)); + break; + } + + return 0; + +} + +/* Determine where the next incoming function argument will + appear. Normally, this works in exactly the same way as + picochip_function_arg, except when the function in question is a + varadic function. In this case, the incoming arguments all appear + to be passed on the stack (actually, some of the arguments are + passed in registers, which are then pushed onto the stack by the + function prologue). */ +rtx +picochip_incoming_function_arg (CUMULATIVE_ARGS cum, int mode, + tree type, int named) +{ + + if (cfun->stdarg) + return 0; + else + return picochip_function_arg (cum, mode, type, named); + +} + +/* Gives the alignment boundary, in bits, of an argument with the + specified mode. */ +int +picochip_get_function_arg_boundary (enum machine_mode mode) +{ + int align; + + if (mode == BLKmode) + align = STACK_BOUNDARY; + else + align = GET_MODE_ALIGNMENT (mode); + + if (align < PARM_BOUNDARY) + align = PARM_BOUNDARY; + + return align; + +} + +/* Compute partial registers. */ +int +picochip_arg_partial_bytes (CUMULATIVE_ARGS * p_cum, enum machine_mode mode, + tree type, bool named ATTRIBUTE_UNUSED) +{ + int type_align_in_units = 0; + int type_size_in_units; + int new_offset = 0; + int offset_overflow = 0; + + unsigned cum = *((unsigned *) p_cum); + + /* VOIDmode is passed when computing the second argument to a `call' + pattern. This can be ignored. */ + if (mode == VOIDmode) + return 0; + + /* Compute the alignment and size of the parameter. */ + type_align_in_units = + picochip_get_function_arg_boundary (mode) / BITS_PER_UNIT; + type_size_in_units = picochip_compute_arg_size (type, mode); + + /* Compute the correct offset (i.e., ensure that the offset meets + the alignment requirements). */ + offset_overflow = cum % type_align_in_units; + if (offset_overflow == 0) + new_offset = cum; + else + new_offset = (cum - offset_overflow) + type_align_in_units; + + if (TARGET_DEBUG) + { + printf ("Partial function arg nregs:\n"); + printf (" Type valid: %s\n", (type ? "yes" : "no")); + printf (" Cumulative Value: %d\n", cum); + printf (" Mode: %s\n", GET_MODE_NAME (mode)); + printf (" Type size: %i units\n", type_size_in_units); + printf (" Alignment: %i units\n", type_align_in_units); + printf (" New offset: %i\n", new_offset); + printf ("\n"); + } + + /* If the new offset is outside the register space, return. */ + if (new_offset >= (MAX_CALL_PARAMETER_REGS * 2)) + return 0; + + /* If the end of the argument is outside the register space, then + the argument must overlap the register space. Return the number + of bytes which are passed in registers. */ + if ((new_offset + type_size_in_units) > (MAX_CALL_PARAMETER_REGS * 2)) + return ((MAX_CALL_PARAMETER_REGS * 2) - new_offset); + + return 0; + +} + +/* Advance the cumulative args counter, returning the new counter. */ +CUMULATIVE_ARGS +picochip_arg_advance (const CUMULATIVE_ARGS cum, int mode, + tree type, int named ATTRIBUTE_UNUSED) +{ + int type_align_in_units = 0; + int type_size_in_units; + int new_offset = 0; + int offset_overflow = 0; + + /* VOIDmode is passed when computing the second argument to a `call' + pattern. This can be ignored. */ + if (mode == VOIDmode) + return 0; + + /* Compute the alignment and size of the parameter. */ + type_align_in_units = + picochip_get_function_arg_boundary (mode) / BITS_PER_UNIT; + type_size_in_units = picochip_compute_arg_size (type, mode); + + /* Compute the correct offset (i.e., ensure that the offset meets + the alignment requirements). */ + offset_overflow = cum % type_align_in_units; + if (offset_overflow == 0) + new_offset = cum; + else + new_offset = (cum - offset_overflow) + type_align_in_units; + + /* Advance past the last argument. */ + new_offset += type_size_in_units; + + return new_offset; + +} + +/* Determine whether a register needs saving/restoring. It does if it + is live in a function, and isn't a call-used register. */ +static int +picochip_reg_needs_saving (int reg_num) +{ + return df_regs_ever_live_p(reg_num) && !call_used_regs[reg_num]; +} + +/* Compute and return offset of the main frame. */ +static int +picochip_frame_byte_offset (void) +{ + gcc_assert(picochip_is_aligned + (crtl->outgoing_args_size, BITS_PER_WORD)); + + return crtl->outgoing_args_size; +} + +/* Return the size of the main frame. */ +static int +picochip_frame_size_in_bytes (void) +{ + int frame_size = get_frame_size(); + int stack_align = STACK_BOUNDARY/BITS_PER_UNIT; + if (!picochip_is_aligned (frame_size, STACK_BOUNDARY)) + frame_size = frame_size + (stack_align - frame_size%stack_align); + gcc_assert(picochip_is_aligned (frame_size, STACK_BOUNDARY)); + return frame_size; +} + +/* Compute and return the size (in bytes) of the register save/restore + area for the current function. This only includes the general + purpose registers - the special purpose stack pointer and link + registers are not included in this area. */ +static int +picochip_save_area_size_in_bytes (void) +{ + int num_regs_to_save = 0; + int i = 0; + + /* Read through all the registers, determining which need to be saved. */ + for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) + { + if (picochip_reg_needs_saving (i)) + num_regs_to_save += 1; + } + + return num_regs_to_save * UNITS_PER_WORD; + +} + +/* Compute and return offset of the save area base. */ +static int +picochip_save_area_byte_offset (void) +{ + int base_offset = (picochip_frame_byte_offset () + + picochip_frame_size_in_bytes ()); + + gcc_assert(picochip_is_aligned (base_offset, BITS_PER_WORD)); + + return base_offset; + +} + +/* Compute and return offset of the special register save area. This + area can be found immediately above the normal save area. It must + be aligned, to allow the registers to be saved and restored as a + pair. */ +static int +picochip_special_save_area_byte_offset (void) +{ + int byte_alignment = STACK_BOUNDARY / BITS_PER_UNIT; + int offset = (picochip_save_area_byte_offset () + + picochip_save_area_size_in_bytes ()); + + if ((offset % byte_alignment) != 0) + offset = ((offset / byte_alignment) + 1) * byte_alignment; + + return offset; + +} + +/* Determine whether the LNK/SP register save/restores can be eliminated. */ +static int +picochip_can_eliminate_link_sp_save (void) +{ + /* This deserves some reasoning. The df_regs_ever_live_p call keeps + changing during optimizations phases. So, this function returns different + values when called from initial_elimination_offset and then again when it + is called from prologue/epilogue generation. This means that argument + accesses become wrong. This wouldnt happen only if we were not using the + stack at all. The following conditions ensures that.*/ + + return (current_function_is_leaf && + !df_regs_ever_live_p(LINK_REGNUM) && + !df_regs_ever_live_p(STACK_POINTER_REGNUM) && + (picochip_special_save_area_byte_offset() == 0) && + (crtl->args.size == 0) && + (crtl->args.pretend_args_size == 0)); +} + +/* Compute the size of the special reg save area (SP and LNK). If the + SP/LNK registers don't need to be saved, this area can shrink to + nothing. */ +static int +picochip_special_save_area_size_in_bytes (void) +{ + + + if (picochip_can_eliminate_link_sp_save ()) + return 0; + else + return 2 * UNITS_PER_WORD; +} + +/* Return the number of pretend arguments. If this function is + varadic, all the incoming arguments are effectively passed on the + stack. If this function has real pretend arguments (caused by a + value being passed partially on the stack and partially in + registers), then return the number of registers used. */ +static int +picochip_pretend_arg_area_size (void) +{ + + if (crtl->args.pretend_args_size != 0) + { + gcc_assert(crtl->args.pretend_args_size % 4 == 0); + + return crtl->args.pretend_args_size; + } + else if (cfun->stdarg) + return 12; + else + return 0; + +} + +/* Compute and return the offset of the pretend arguments. The pretend + arguments are contiguous with the incoming arguments, and must be + correctly aligned. */ +static int +picochip_pretend_arg_area_byte_offset (void) +{ + int base_offset = 0; + + base_offset = (picochip_special_save_area_byte_offset () + + picochip_special_save_area_size_in_bytes ()); + + gcc_assert(picochip_is_aligned (base_offset, STACK_BOUNDARY)); + gcc_assert(picochip_is_aligned + (base_offset + picochip_pretend_arg_area_size (), STACK_BOUNDARY)); + + return base_offset; + +} + +/* Compute and return the offset of the incoming arguments. If a + static chain is in use, this will be passed just before the other + arguments. This means that the pretend argument mechanism, used in + variadic functions, doesn't work properly. Thus, static chains work + on their own, as do variadic functions, but not the combination of + the two. This isn't really a problem. */ +static int +picochip_arg_area_byte_offset (void) +{ + int base_offset = (picochip_pretend_arg_area_byte_offset () + + picochip_pretend_arg_area_size ()); + + /* Add an extra 4 bytes - only an extra 16-bits are required, but + the alignment on a 32-bit boundary must be maintained. */ + if (cfun->static_chain_decl != NULL) + { + gcc_assert (!cfun->stdarg); + base_offset += 4; + } + + gcc_assert(picochip_is_aligned (base_offset, STACK_BOUNDARY)); + + return base_offset; + +} + +int +picochip_regno_nregs (int regno ATTRIBUTE_UNUSED, int mode) +{ + + /* Special case - only one register needed. */ + if (GET_MODE_CLASS (mode) == MODE_CC) + return 1; + + /* We actually do not allocate acc0 ever. But, it seems like we need to + make it look like a allocatable register for the dataflow checks to work + properly. Note that hard_regno_mode_ok will always return 0 for acc0*/ + + if (regno == 16) + return 1; + + /* General case - compute how much space in terms of units. */ + return ((GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1) / UNITS_PER_WORD); + +} + +int +picochip_class_max_nregs (int class, int mode) +{ + int size = ((GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1) / UNITS_PER_WORD); + + if (class == ACC_REGS) + return 1; + + if (GET_MODE_CLASS (mode) == MODE_CC) + return 1; + else + return size; + +} + +/* Eliminate a register that addresses the stack (e.g., frame pointer, + argument pointer) by replacing it with a constant offset from the + main stack register. */ +int +initial_elimination_offset (int from, int to) +{ + int offset_from_sp = 0; + + if (FRAME_POINTER_REGNUM == from && STACK_POINTER_REGNUM == to) + offset_from_sp = picochip_frame_byte_offset (); + else if (ARG_POINTER_REGNUM == from && STACK_POINTER_REGNUM == to) + offset_from_sp = picochip_pretend_arg_area_byte_offset (); + else + gcc_unreachable(); + + return offset_from_sp; + +} + +/* Compute and return the size of the incoming argument area. */ +static int +picochip_arg_area_size_in_bytes (void) +{ + return crtl->args.size; +} + +/* Determine whether the given register is valid. When the strict mode + is used, only hard registers are valid, otherwise any register is + valid. */ +static int +picochip_legitimate_address_register (rtx x, unsigned strict) +{ + + /* Sanity check - non-registers shouldn't make it here, but... */ + if (REG != GET_CODE (x)) + return 0; + + if (strict) + return REGNO (x) < FIRST_NONHARD_REGISTER; + else + return 1; + +} + +/* Determine whether the given constant is in the range required for + the given base register. */ +static int +picochip_const_ok_for_base (enum machine_mode mode, int regno, int offset, + int strict) +{ + HOST_WIDE_INT corrected_offset; + + if (GET_MODE_SIZE (mode) != 0) + { + if (GET_MODE_SIZE(mode) <= 4) + { + /* We can allow incorrect offsets if strict is 0. If strict is 1, + we are in reload and these memory accesses need to be changed. */ + if (offset % GET_MODE_SIZE (mode) != 0 && strict == 1) + return 0; + corrected_offset = offset / GET_MODE_SIZE (mode); + } + else + { + /* We can allow incorrect offsets if strict is 0. If strict is 1, + we are in reload and these memory accesses need to be changed. */ + if (offset % 4 != 0 && strict == 1) + return 0; + corrected_offset = offset / 4; + } + } + else + { + /* Default to the byte offset as supplied. */ + corrected_offset = offset; + } + + /* The offset from the base register can be different depending upon + the base register. The stack/frame/argument pointer offsets can + all be greater than a simple register-based offset. Note that the + frame/argument pointer registers are actually eliminations of the + stack pointer, so a value which is valid for an offset to, for + example, the frame pointer, might be invalid for the stack + pointer once the elimination has occurred. However, there is no + need to handle this special case here, as the stack offset is + always checked after elimination anyway, and the generated code + seems to have identical performance. */ + if (regno == STACK_POINTER_REGNUM || + regno == FRAME_POINTER_REGNUM || regno == ARG_POINTER_REGNUM) + return picochip_const_ok_for_letter_p (corrected_offset, 'K'); + else + return picochip_const_ok_for_letter_p (corrected_offset, 'J'); + +} + +/* Determine whether a given rtx is a legitimate address for machine_mode + MODE. STRICT is non-zero if we're being strict - any pseudo that + is not a hard register must be a memory reference. */ +int +picochip_legitimate_address_p (int mode, rtx x, unsigned strict) +{ + int valid = 0; + + switch (GET_CODE (x)) + { + case REG: + valid = picochip_legitimate_address_register (x, strict); + break; + + case PLUS: + { + rtx base = XEXP (x, 0); + rtx offset = XEXP (x, 1); + + valid = (REG == GET_CODE (base) && + REGNO_OK_FOR_BASE_P (REGNO(base)) && + picochip_legitimate_address_register (base, strict) && + CONST_INT == GET_CODE (offset) && + picochip_const_ok_for_base (mode, REGNO (base), + INTVAL (offset),strict)); + break; + } + + case SYMBOL_REF: + /* The user can select whether a symbol can be used as a memory + address. Typically, this will decrease execution time (no + register load is required first), but will increase code size + (because the symbol will be used several times, rather than + loaded once into a register.*/ + valid = TARGET_SYMBOL_AS_ADDRESS; + break; + + case CONST: + { + /* A constant memory address must be a (plus (symbol_ref) + (const_int)), and is only allowed when the symbols are + permitted addresses. */ + rtx inner = XEXP (x, 0); + + valid = (TARGET_SYMBOL_AS_ADDRESS && + PLUS == GET_CODE (inner) && + SYMBOL_REF == GET_CODE (XEXP (inner, 0)) && + CONST_INT == GET_CODE (XEXP (inner, 1))); + + break; + + } + + default: + valid = 0; + } + + return valid; + +} + +/* Detect an rtx which matches (plus (symbol_ref) (const_int)). */ +int +picochip_symbol_offset (rtx operand) +{ + + return (PLUS == GET_CODE (operand) && + SYMBOL_REF == GET_CODE (XEXP (operand, 0)) && + CONST_INT == GET_CODE (XEXP (operand, 1))); + +} + +/* Assembly output. */ + +/* The format here should match the format used in the output of + symbol_ref's elsewhere in this file. */ +void +picochip_output_label (FILE * stream, const char name[]) +{ + int is_cfi_label = (strncmp (name, "picoMark_LCFI", 13) == 0); + + /* If VLIW scheduling is in use, any Call Frame Information labels + generated inside a packet must have their output deferred until + the end of the packet. */ + if (picochip_schedule_type == DFA_TYPE_SPEED && + is_cfi_label && picochip_vliw_continuation) + { + if (picochip_current_vliw_state.num_cfi_labels_deferred == 2) + { + internal_error ("LCFI labels have already been deferred."); + } + strcpy (picochip_current_vliw_state.cfi_label_name[ + picochip_current_vliw_state.num_cfi_labels_deferred], name); + picochip_current_vliw_state.num_cfi_labels_deferred++; + } + else + { + assemble_name (stream, name); + + if (strncmp (name, "picoMark_", 9) == 0) + fprintf (stream, "=\n"); + else + fprintf (stream, ":\n"); + + } + +} + +/* The format here should match the format used in the output of + symbol_ref's elsewhere in this file. */ +void +picochip_output_labelref (FILE * stream, const char name[]) +{ + fprintf (stream, "_%s", name); +} + +void +picochip_weaken_label (FILE * stream, const char name[]) +{ + fprintf (stream, ".weak "); + assemble_name (stream, name); + fprintf (stream, "\n"); +} + +/* Return true if the given label (or label prefix) denotes a marker + label which should be emitted in the form LABEL= */ +static int +picochip_is_marker_prefix (const char *prefix) +{ + return (strcmp (prefix, "L") != 0 && strcmp (prefix, "LC") != 0 + && strcmp (prefix, "LP") != 0); +} + +void +picochip_output_internal_label (FILE * stream, const char *prefix, + unsigned long num) +{ + + /* Emit different types of label, based upon their prefix. They + are handled differently to allow the assembler to ensure that + branch target labels are properly aligned, while other labels + will only serve as code markers, not branch targets. Aligning + labels unnecessarily can result in much code wastage. */ + if (picochip_is_marker_prefix (prefix)) + { + /* Special label marker. If it appears in the middle of a VLIW + packet, defer it until the end of the packet. There has + never been a need to handle more than one lm label at a time. */ + if (picochip_schedule_type == DFA_TYPE_SPEED && + (strcmp (prefix, "LM")) == 0 && picochip_vliw_continuation) + { + if (strlen (picochip_current_vliw_state.lm_label_name) != 0) + internal_error ("LM label has already been deferred."); + + sprintf (picochip_current_vliw_state.lm_label_name, + "picoMark_%s%ld", prefix, num); + } + else + { + /* Marker label. */ + fprintf (stream, "_picoMark_%s%ld=\n", prefix, num); + } + + } + else + { + /* Normal label. */ + fprintf (stream, "_%s%ld:\n", prefix, num); + } + +} + +void +picochip_generate_internal_label (char *str, const char *prefix, long num) +{ + /* Two types of internal label can be generated: branch target + labels and code marker labels. Branch target labels must always + be aligned (since code will execute at these + points). Differentiate between the two by prepending markers with + a unique prefix, which can later be used in output_label to + figure out which label syntax to use. */ + if (picochip_is_marker_prefix (prefix)) + sprintf (str, "picoMark_%s%ld", prefix, num); + else + sprintf (str, "%s%ld", prefix, num); + +} + +void +picochip_asm_output_anchor (rtx symbol) +{ + fprintf (asm_out_file, ".offsetData _%s, ",XSTR (symbol, 0)); + fprintf (asm_out_file, "+ " HOST_WIDE_INT_PRINT_DEC"\n",SYMBOL_REF_BLOCK_OFFSET(symbol)); +} + +void +picochip_output_aligned_common (FILE * stream, const char *name, + unsigned size, unsigned alignment) +{ + + fprintf (stream, ".commonData "); + assemble_name (stream, name); + fprintf (stream, ", %u, %u\n", size, alignment / 8); + picochip_output_global (stream, name); + +} + +void +picochip_output_aligned_local (FILE * stream, const char *name, + unsigned size, unsigned alignment) +{ + + fprintf (stream, ".commonData "); + assemble_name (stream, name); + fprintf (stream, ", %u, %u\n", size, alignment / 8); + +} + +void +picochip_output_global (FILE * stream, const char *name) +{ + fprintf (stream, ".global "); + assemble_name (stream, name); + fprintf (stream, "\n"); +} + +/* Output an assembly language string. Output as a sequence of decimal + numbers, followed by the literal string to make it obvious what the + numbers represent. */ +void +picochip_output_ascii (FILE * file, const char *str, int length) +{ + int i = 0; + + fprintf (file, ".ascii "); + + for (i = 0; i < length; ++i) + { + fprintf (file, "16#%hhx# ", (char) (str[i])); + } + + fprintf (file, " ; "); + + for (i = 0; i < length; ++i) + { + char c = str[i]; + + switch (c) + { + case '\n': + fprintf (file, "\\n"); + break; + case '\t': + fprintf (file, "\\t"); + break; + case '\0': + fprintf (file, "\\0"); + break; + default: + fprintf (file, "%c", c); + } + + } + + fprintf (file, "\n"); + +} + +/* Output the beginning of an ASM file. */ +void +picochip_asm_file_start (void) +{ + default_file_start (); + + fprintf (asm_out_file, "// picoChip ASM file\n"); + fprintf (asm_out_file, "//.file \"%s\"\n", main_input_filename); + + fprintf (asm_out_file, "// Has byte access: %s\n", + (TARGET_HAS_BYTE_ACCESS ? "Yes" : "No")); + + if (TARGET_HAS_MUL_UNIT) + fprintf (asm_out_file, "// Has multiply: Yes (Multiply unit)\n"); + else if (TARGET_HAS_MAC_UNIT) + fprintf (asm_out_file, "// Has multiply: Yes (Mac unit)\n"); + else + fprintf (asm_out_file, "// Has multiply: No\n"); + + /* Variable tracking should be run after all optimizations which change order + of insns. It also needs a valid CFG. This can't be done in + picochip_override_options, because flag_var_tracking is finalized after + that. */ + picochip_flag_var_tracking = flag_var_tracking; + flag_var_tracking = 0; +} + +/* Output the end of an ASM file. */ +void +picochip_asm_file_end (void) +{ + /* Include a segment end to make it easy for PERL scripts to grab + segments. This is now done by assembler*/ + + fprintf (asm_out_file, "// End of picoChip ASM file\n"); + +} + +/* Output frame debug information to the given stream. */ +static void +picochip_output_frame_debug (FILE * file) +{ + int i = 0; + + if (current_function_is_leaf) + fprintf (file, "\t\t// Leaf function\n"); + else + fprintf (file, "\t\t// Non-leaf function\n"); + + if (picochip_can_eliminate_link_sp_save ()) + fprintf (file, "\t\t// Link/fp save/restore can be eliminated\n"); + + if (cfun->static_chain_decl != NULL) + fprintf (file, "\t\t// Static chain in use\n"); + + fprintf (file, "\t\t// Incoming argument size: %d bytes\n", + picochip_arg_area_size_in_bytes ()); + fprintf (file, "\t\t// Incoming arg offset: %d\n", + picochip_arg_area_byte_offset ()); + fprintf (file, "\t\t// Pretend arg size: %d\n", + picochip_pretend_arg_area_size ()); + fprintf (file, "\t\t// Pretend arg offset (ARGP): %d\n", + picochip_pretend_arg_area_byte_offset ()); + fprintf (file, "\t\t// Special reg area size: %d bytes\n", + picochip_special_save_area_size_in_bytes ()); + fprintf (file, "\t\t// Special reg area offset: %d\n", + picochip_special_save_area_byte_offset ()); + + /* Output which registers are saved. */ + fprintf (file, "\t\t// Saved regs: "); + for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) + { + if (picochip_reg_needs_saving (i)) + fprintf (file, "%s ", picochip_regnames[i]); + } + fprintf (file, "\t\t\n"); + + fprintf (file, "\t\t// Save area size: %d bytes\n", + picochip_save_area_size_in_bytes ()); + fprintf (file, "\t\t// Save area offset: %d\n", + picochip_save_area_byte_offset ()); + + fprintf (file, "\t\t// Frame size: %ld bytes\n", get_frame_size ()); + fprintf (file, "\t\t// Frame offset (FP): %d\n", + picochip_frame_byte_offset ()); + + fprintf (file, "\t\t// Outgoing argument area size: %d bytes\n", + crtl->outgoing_args_size); + +} + +/* Output picoChip function prologue. This contains human-readable + information about the function. */ +void +picochip_function_prologue (FILE * file, HOST_WIDE_INT size ATTRIBUTE_UNUSED) +{ + /* Get the function's name, as described by its RTL. This may be + different from the DECL_NAME name used in the source file. The + real declaration name must be used, to ensure that the prologue + emits the right information for the linker. */ + rtx x; + const char *fnname; + x = DECL_RTL (current_function_decl); + gcc_assert (MEM_P (x)); + x = XEXP (x, 0); + gcc_assert (GET_CODE (x) == SYMBOL_REF); + fnname = XSTR (x, 0); + + /* Note that the name of the function is given in the &_%s + form. This matches the name of the function as used in labels, + and function calls, and enables processCallGraph to match + function calls to the name of the function, as defined here. */ + fprintf (file, "// picoChip Function Prologue : &_%s = %d bytes\n", + fnname, picochip_arg_area_byte_offset ()); + + picochip_output_frame_debug (file); + fprintf (file, "\n"); + +} + +/* Output picoChip function epilogue. */ +void +picochip_function_epilogue (FILE * file, HOST_WIDE_INT size ATTRIBUTE_UNUSED) +{ + + rtx x; + const char *fnname; + x = DECL_RTL (current_function_decl); + gcc_assert (MEM_P (x)); + x = XEXP (x, 0); + gcc_assert (GET_CODE (x) == SYMBOL_REF); + fnname = XSTR (x, 0); + fprintf (file, "\n// picoChip Function Epilogue : %s\n\n", + fnname); +} + +/* Manipulate the asm output. Some machines only execute the code when + there is actually a chance of needing it (e.g., FRV doesn't execute + it if the scheduling pass wasn't used). We always execute it, + simple to ensure that it is exercised more often, and bugs are more + likely to be found. + + This function's prime reason for existence is to insert the VLIW + separators where appropriate. The separators must be inserted + before any comments which appear at the end of the file. + +*/ +const char * +picochip_asm_output_opcode (FILE * f, const char *ptr) +{ + int c; + + /* Flag to specify when a VLIW continuation has been inserted onto + the line. Continuations are either inserted before any comments, + or before the end of the line is reached. The flag ensures that + we don't insert continuations twice (i.e., at the comment and the + end of line). */ + int continuation_inserted = 0; + + /* If the instruction uses multiple lines (i.e., a new line + character appears in the opcode), then ensure that no attempt is + made to pack it into a VLIW. */ + if (strchr (ptr, '\n') != NULL && picochip_vliw_continuation) + internal_error + ("picochip_asm_output_opcode - Found multiple lines in VLIW packet %s\n", + ptr); + + + /* If a delay slot is pending, output the directive to the assembler + before the instruction. */ + if (picochip_is_delay_slot_pending) + { + picochip_is_delay_slot_pending = 0; + fputs ("=->\t", f); + } + + /* Keep going for entire opcode. All substitution performed ourselves. */ + while (*ptr) + { + c = *ptr++; + + /* Determine whether a VLIW continuation must be inserted before + any comments, or the end of the opcode. A flag is set to show + that we have inserted a continuation on this line, so that we + don't try to insert another continuation when the end of the + opcode is reached. The only other case for a continuation + might have been a newline, but these aren't allowed in + conjunction with VLIW continuations (see above code). */ + if (picochip_vliw_continuation && + !continuation_inserted && + ((c == '/' && (*ptr == '/')) || *ptr == '\0')) + { + fprintf (f, "\\ "); + continuation_inserted = 1; + } + + /* Detect an explicit VLIW separator. */ + if (c == '%' && (*ptr == '|')) + { + fprintf (f, "\\"); + ptr++; + } + /* Detect the need for an ALU id operand. */ + else if (c == '%' && (*ptr == '#')) + { + fputc (picochip_get_vliw_alu_id (), f); + + if (TARGET_DEBUG) + printf ("Generated ALU char at %s for insn %d\n", ptr, + INSN_UID (picochip_current_prescan_insn)); + + /* Skip past unwanted # */ + ptr++; + } + /* Detect the need for branch delay slot. */ + else if (c == '%' && (*ptr == '>')) + { + /* Only emit delay slots (NOP's, or otherwise) when delay + * slot scheduling has actually been enabled, otherwise VLIW + * scheduling and delay slot scheduling output combine to + * produce nasty effects. */ + if (flag_delayed_branch) + { + if (dbr_sequence_length () == 0) + fputs ("\n=->\tNOP", f); + else + picochip_is_delay_slot_pending = 1; + } + + /* Skip past unwanted > */ + ptr++; + } + /* Detect any %digit specifiers. */ + else if (c == '%' && (*ptr >= '0' && *ptr <= '9')) + { + c = atoi (ptr); + picochip_print_operand (f, recog_data.operand[c], 0); + while ((c = *ptr) >= '0' && c <= '9') + ptr++; + } + /* Detect any %letterdigit specifiers. */ + else if (c == '%' && ((*ptr >= 'a' && *ptr <= 'z') + || (*ptr >= 'A' && *ptr <= 'Z'))) + { + int letter = *ptr++; + + c = atoi (ptr); + + switch (letter) + { + case 'l': + output_asm_label (recog_data.operand[c]); + break; + + case 'a': + output_address (recog_data.operand[c]); + break; + + default: + picochip_print_operand (f, recog_data.operand[c], letter); + } + + while ((c = *ptr) >= '0' && c <= '9') + ptr++; + } + else if (c == '%') + internal_error + ("picochip_asm_output_opcode - can't output unknown operator %c\n", + *ptr); + else + fputc (c, f); + } + + /* Reached the end of the packet. If any labels were deferred + during output, emit them now. */ + if (!picochip_vliw_continuation) + { + if (picochip_current_vliw_state.num_cfi_labels_deferred != 0) + { + fprintf (f, "\n"); + assemble_name (f, picochip_current_vliw_state.cfi_label_name[0]); + fprintf (f, "="); + if (picochip_current_vliw_state.num_cfi_labels_deferred == 2) + { + fprintf (f, "\n"); + assemble_name (f, picochip_current_vliw_state.cfi_label_name[1]); + fprintf (f, "="); + } + } + + if (strlen (picochip_current_vliw_state.lm_label_name) != 0) + { + fprintf (f, "\n"); + assemble_name (f, picochip_current_vliw_state.lm_label_name); + fprintf (f, "="); + } + } + + /* Output an end-of-packet marker if requested. */ + if (!picochip_vliw_continuation && + TARGET_DEBUG && picochip_schedule_type == DFA_TYPE_SPEED) + fprintf (f, "\n\t//-------------- End of VLIW packet -----------------"); + + return ptr; +} + +/* Function RTL expansion. */ + +/* Expand the prologue into RTL. */ +void +picochip_expand_prologue (void) +{ + int stack_adjustment = 0; + int special_save_offset = 0; + int general_save_offset = 0; + int reg_save_offset = 0; + int i = 0; + + stack_adjustment = picochip_arg_area_byte_offset (); + general_save_offset = + -(stack_adjustment - picochip_save_area_byte_offset ()); + special_save_offset = + -(stack_adjustment - picochip_special_save_area_byte_offset ()); + + /* Save the link registers. We could try to save just one register + here. This would reduce the amount of stack space required. + There hasnt been a good reason to do that so far. */ + if (!picochip_can_eliminate_link_sp_save ()) + picochip_emit_save_register (gen_rtx_REG (SImode, LINK_REGNUM), + special_save_offset); + + /* Save callee-save registers. */ + reg_save_offset = 0; + for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) + { + if (picochip_reg_needs_saving (i)) + { + + /* If this register is an even numbered register, and the + next register also needs to be saved, use a SImode save, + which does both in one instruction. Note that a special + check is performed to ensure that the double word aligned + store is valid (e.g., it is possible that r6, r8, r9 need + to be saved, in which case once r6 has been saved, the + stored offset is no longer aligned, and an STL/LDL + instruction becomes invalid). Alternately, we could store all + aligned registers first and then save the single one(s). */ + if ((i % 2 == 0) && + picochip_reg_needs_saving (i + 1) && + picochip_is_aligned (reg_save_offset, LONG_TYPE_SIZE)) + { + picochip_emit_save_register (gen_rtx_REG (SImode, i), + general_save_offset + + reg_save_offset); + reg_save_offset += 2 * UNITS_PER_WORD; + i++; + } + else + { + picochip_emit_save_register (gen_rtx_REG (HImode, i), + general_save_offset + + reg_save_offset); + reg_save_offset += UNITS_PER_WORD; + } + } + + } + + /* Emit a stack adjustment where required. */ + if (stack_adjustment != 0) + picochip_emit_stack_allocate (stack_adjustment); + + /* If this function uses varadic arguments, write any unnamed + registers to the stack. */ + if (cfun->stdarg) + { + int stdarg_offset = picochip_pretend_arg_area_byte_offset (); + + /* Sanity check. The pretend argument offset should be 32-bit aligned. */ + gcc_assert(picochip_pretend_arg_area_byte_offset () % 4 == 0); + + picochip_emit_save_register (gen_rtx_REG (SImode, 0), stdarg_offset); + picochip_emit_save_register (gen_rtx_REG (SImode, 2), + stdarg_offset + 4); + picochip_emit_save_register (gen_rtx_REG (SImode, 4), + stdarg_offset + 8); + + } + +} + +/* Expand the epilogue into RTL. */ +void +picochip_expand_epilogue (int is_sibling_call ATTRIBUTE_UNUSED) +{ + int stack_adjustment = 0; + int special_save_offset = 0; + int general_save_offset = 0; + int reg_save_offset = 0; + int i = 0; + int use_link_fp_restore_stack_adjust = 0; /* Default to using an explicit + stack restore. */ + + stack_adjustment = picochip_arg_area_byte_offset (); + general_save_offset = + -(stack_adjustment - picochip_save_area_byte_offset ()); + special_save_offset = + -(stack_adjustment - picochip_special_save_area_byte_offset ()); + + /* Emit a stack adjustment where required. */ + if (stack_adjustment != 0) + { + /* If the link/fp is already being restored, and the offset to + their save location is small enough, don't bother adjusting + the stack explicitly. */ + if (picochip_special_save_area_byte_offset () < 512 && + !picochip_can_eliminate_link_sp_save ()) + use_link_fp_restore_stack_adjust = 1; + else + /* Explicitly restore the stack. */ + picochip_emit_stack_allocate (-stack_adjustment); + } + + /* Restore the Link/FP registers. Only save the link register? */ + if (!picochip_can_eliminate_link_sp_save ()) + { + if (use_link_fp_restore_stack_adjust) + picochip_emit_restore_register (gen_rtx_REG (SImode, LINK_REGNUM), + picochip_special_save_area_byte_offset + ()); + else + picochip_emit_restore_register (gen_rtx_REG (SImode, LINK_REGNUM), + special_save_offset); + } + + /* Restore callee-save registers. */ + reg_save_offset = 0; + for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) + { + if (picochip_reg_needs_saving (i)) + { + + /* If this register is an even numbered register, and the + next register also needs to be saved, use a SImode save, + which does both in one instruction. Note that a special + check is performed to ensure that the double word aligned + store is valid (e.g., it is possible that r6, r8, r9 need + to be saved, in which case once r6 has been saved, the + stored offset is no longer aligned, and an STL/LDL + instruction becomes invalid). We could store all aligned + registers first, and then save the single one(s). */ + if ((i % 2 == 0) && + picochip_reg_needs_saving (i + 1) && + picochip_is_aligned (reg_save_offset, LONG_TYPE_SIZE)) + { + picochip_emit_restore_register (gen_rtx_REG (SImode, i), + general_save_offset + + reg_save_offset); + reg_save_offset += 2 * UNITS_PER_WORD; + i++; + } + else + { + picochip_emit_restore_register (gen_rtx_REG (HImode, i), + general_save_offset + + reg_save_offset); + reg_save_offset += UNITS_PER_WORD; + } + } + + } + + /* Emit a return instruction, which matches a (parallel + [(return) (use r12)]) */ + { + rtvec p; + p = rtvec_alloc (2); + + RTVEC_ELT (p, 0) = gen_rtx_RETURN (VOIDmode); + RTVEC_ELT (p, 1) = gen_rtx_USE (VOIDmode, + gen_rtx_REG (Pmode, LINK_REGNUM)); + emit_jump_insn (gen_rtx_PARALLEL (VOIDmode, p)); + } + +} + +/* Assembly instruction output. */ + +/* Test whether the given branch instruction is short, or long. Short + * branches are equivalent to real branches, and may be DFA + * scheduled. Long branches expand to a macro which is handled by the + * elaborator, and cannot be scheduled. Occasionally, the branch + * shortening pass, which is run after DFA scheduling, will change the + * code layout and cause the short branch to be reverted into a long + * branch. Instead of having to fix this up by emitting new assembly, + * the short branch is emitted anyway. There is plenty of slack in the + * calculation of long and short branches (10-bit offset, but only + * 9-bits used in computation), so there is enough slack for this to + * be safe. */ +static int +picochip_is_short_branch (rtx insn) +{ + int isRealShortBranch = (get_attr_length(insn) == SHORT_BRANCH_LENGTH); + + return (isRealShortBranch || + (!isRealShortBranch && + picochip_current_vliw_state.num_insns_in_packet > 1)); +} + +/* Output a compare-and-branch instruction (matching the cbranch + pattern). */ +const char * +picochip_output_cbranch (rtx operands[]) +{ + + if (HImode != GET_MODE (operands[1]) || + (HImode != GET_MODE (operands[2]) && + GET_CODE (operands[2]) != CONST_INT)) + { + internal_error ("%s: At least one operand can't be handled", + __FUNCTION__); + } + + /* Use the type of comparison to output the appropriate condition + test. */ + switch (GET_CODE (operands[0])) + { + case NE: + return ("// if (%1 != %2) goto %l3\n\tSUB.%# %1,%2,r15\n\tJMPNE %l3"); + + case EQ: + return ("// if (%1 == %2) goto %l3\n\tSUB.%# %1,%2,r15\n\tJMPEQ %l3"); + + case LE: + /* Reverse the operand order to be GE */ + return ("// if (%1 <= %2) goto %l3\n\tSUB.%# %2,%1,r15\n\tJMPGE %l3"); + + case LEU: + /* Reverse operand order of GEU. */ + return ("// if (%1 <= %2) goto %l3\n\tSUB.%# %2,%1,r15\n\tJMPHS %l3"); + + case GE: + return ("// if (%1 >= %2) goto %l3\n\tSUB.%# %1,%2,r15\n\tJMPGE %l3"); + + case GEU: + return ("// if (%1 >= %2) goto %l3\n\tSUB.%# %1,%2,r15\n\tJMPHS %l3"); + + case LT: + return ("// if (%1 < %2) goto %l3\n\tSUB.%# %1,%2,r15\n\tJMPLT %l3"); + + case LTU: + return ("// if (%1 <{U} %2) goto %l3\n\tSUB.%# %1,%2,r15\n\tJMPLO %l3"); + + case GT: + /* Reversed operand version of LT. */ + return ("// if (%1 > %2) goto %l3\n\tSUB.%# %2,%1,r15\n\tJMPLT %l3"); + + case GTU: + /* Reverse an LTU. */ + return ("// if (%1 >{U} %2) goto %l3\n\tSUB.%# %2,%1,r15\n\tJMPLO %l3"); + + default: + gcc_unreachable(); + } +} + +/* Output a compare-and-branch instruction (matching the cbranch + pattern). This function is current unused since the cbranch + split is disabled. The function is kept around so we can use + it when we understand how to do cbranch split safely. */ +const char * +picochip_output_compare (rtx operands[]) +{ + + if (HImode != GET_MODE (operands[1]) || + (HImode != GET_MODE (operands[2]) && + GET_CODE (operands[2]) != CONST_INT)) + { + internal_error ("%s: At least one operand can't be handled", + __FUNCTION__); + } + + /* Use the type of comparison to output the appropriate condition + test. */ + int code = GET_CODE (operands[0]); + switch (code) + { + case NE: + return ("SUB.%# %1,%2,r15\t// CC := (%0)"); + + case EQ: + return ("SUB.%# %1,%2,r15\t// CC := (%0)"); + + case LE: + /* Reverse the operand order to be GE */ + return ("SUB.%# %2,%1,r15\t// CC := (%0)"); + + case LEU: + /* Reverse operand order of GEU. */ + return ("SUB.%# %2,%1,r15\t// CC := (%0)"); + + case GE: + return ("SUB.%# %1,%2,r15\t// CC := (%0)"); + + case GEU: + return ("SUB.%# %1,%2,r15\t// CC := (%0)"); + + case LT: + return ("SUB.%# %1,%2,r15\t// CC := (%0)"); + + case LTU: + return ("SUB.%# %1,%2,r15\t// CC := (%0)"); + + case GT: + /* Reversed operand version of LT. */ + return ("SUB.%# %2,%1,r15\t// CC := (%0)"); + + case GTU: + /* Reverse an LTU. */ + return ("SUB.%# %2,%1,r15\t// CC := (%0)"); + + default: + gcc_unreachable(); + } +} + +/* Output the branch insn part of a compare-and-branch split. */ +const char * +picochip_output_branch (rtx operands[], rtx insn) +{ + + int code = GET_CODE(operands[2]); + if (picochip_is_short_branch (insn)) + { + /* Short branches can be output directly using the + appropriate instruction. */ + switch (code) + { + case NE: + return ("BNE %l0 %>"); + case EQ: + return ("BEQ %l0 %>"); + case LE: + return ("BGE %l0 %>"); + case LEU: + return ("BHS %l0 %>"); + case GE: + return ("BGE %l0 %>"); + case GEU: + return ("BHS %l0 %>"); + case LT: + return ("BLT %l0 %>"); + case LTU: + return ("BLO %l0 %>"); + case GT: + return ("BLT %l0 %>"); + case GTU: + return ("BLO %l0 %>"); + default: + internal_error ("Unknown short branch in %s (type %d)\n", + __FUNCTION__, (int) INTVAL (operands[1])); + return "UNKNOWN_BRANCH"; + } + } + else + { + /* Long branches result in the emission of a special + instruction, which the assembler expands into a suitable long + branch. */ + + /* Use the type of comparison to output the appropriate condition + test. */ + switch (code) + { + case NE: + return ("JMPNE %l0 %>"); + case EQ: + return ("JMPEQ %l0 %>"); + case LE: + return ("JMPGE %l0 %>"); + case LEU: + return ("JMPHS %l0 %>"); + case GE: + return ("JMPGE %l0 %>"); + case GEU: + return ("JMPHS %l0 %>"); + case LT: + return ("JMPLT %l0 %>"); + case LTU: + return ("JMPLO %l0 %>"); + case GT: + return ("JMPLT %l0 %>"); + case GTU: + return ("JMPLO %l0 %>"); + + default: + internal_error ("Unknown long branch in %s (type %d)\n", + __FUNCTION__, (int) INTVAL (operands[1])); + return "UNKNOWN_BRANCH"; + } + + } +} + +/* Output a jump instruction. */ +const char * +picochip_output_jump (rtx insn) +{ + if (picochip_is_short_branch (insn)) + return "BRA %l0%>"; + else + return "JMPRA %l0%>"; +} + +const char * +picochip_output_put_array (int alternative, rtx operands[]) +{ + /* Local output buffer. */ + char buf[256]; + + int portArraySize = INTVAL(operands[1]); + int portBaseIndex = INTVAL(operands[2]); + + if (alternative == 0) + { + sprintf (buf, "// Array put\n\tadd.0 [lsl %%0,2],&__commTable_put_%d_%d,lr\n\tjl (lr)", + portArraySize, portBaseIndex); + output_asm_insn (buf, operands); + } + else if (alternative == 1) + { + /* Constant port id. Emit a real instruction. */ + int portIndex = INTVAL(operands[0]) + portBaseIndex; + if (portIndex < portBaseIndex || + portIndex >= (portBaseIndex + portArraySize)) + { + error ("PUT uses port array index %d, which is out of range [%d..%d)", + portIndex, portBaseIndex, portBaseIndex + portArraySize); + } + sprintf(buf, "PUT R[0:1],%d", portIndex); + output_asm_insn (buf, operands); + } + else + gcc_unreachable(); + + /* Both alternatives output the insn directly. */ + return ""; +} + +const char *picochip_output_get_array (int alternative, rtx operands[]) +{ + /* Local output buffer. */ + char buf[256]; + + int portArraySize = INTVAL(operands[1]); + int portBaseIndex = INTVAL(operands[2]); + + if (alternative == 0) + { + sprintf (buf, "// Array get\n\tadd.0 [lsl %%0,2],&__commTable_get_%d_%d,lr\n\tjl (lr)", + portArraySize, portBaseIndex); + output_asm_insn (buf, operands); + } + else if (alternative == 1) + { + /* Constant port id. Emit a real instruction. */ + int portIndex = INTVAL(operands[0]) + portBaseIndex; + if (portIndex < portBaseIndex || + portIndex >= (portBaseIndex + portArraySize)) + { + error ("GET uses port array index %d, which is out of range [%d..%d)", + portIndex, portBaseIndex, portBaseIndex + portArraySize); + } + sprintf(buf, "GET %d,R[0:1]", portIndex); + output_asm_insn (buf, operands); + } + else + gcc_unreachable(); + + /* Both alternatives output the insn directly. */ + return ""; +} + +const char *picochip_output_testport_array (int alternative, rtx operands[]) +{ + /* Local output buffer. */ + char buf[256]; + + int portArraySize = INTVAL(operands[2]); + int portBaseIndex = INTVAL(operands[3]); + + if (alternative == 0) + { + sprintf (buf, "// Array tstport\n\tadd.0 [lsl %%1,2],&__commTable_tstport_%d_%d,lr\n\tjl (lr)\n=->\tcopy.0 0,%%0\n\tcopyeq 1,%%0", + portArraySize, portBaseIndex); + output_asm_insn (buf, operands); + } + else if (alternative == 1) + { + /* Constant port id. Emit a real instruction. */ + int portIndex = INTVAL(operands[1]) + portBaseIndex; + if (portIndex < portBaseIndex || + portIndex >= (portBaseIndex + portArraySize)) + { + error ("PUT uses port array index %d, which is out of range [%d..%d)", + portIndex, portBaseIndex, portBaseIndex + portArraySize); + } + sprintf(buf, "copy.1 0,%%0 %%| TSTPORT %d\n\tcopyeq 1,%%0", portIndex); + output_asm_insn (buf, operands); + } + else + gcc_unreachable(); + + /* Both alternatives output the insn directly. */ + return ""; +} + +/* Output a comparison operand as a symbol (e.g., >). */ +static void +picochip_print_comparison (FILE * file, rtx operand, int letter) +{ + + if (letter == 'i') + { + /* Output just the comparison symbol. */ + switch (GET_CODE (operand)) + { + case NE: + fprintf (file, "!="); + break; + case EQ: + fprintf (file, "=="); + break; + case GE: + fprintf (file, ">="); + break; + case GEU: + fprintf (file, ">={U}"); + break; + case LT: + fprintf (file, "<"); + break; + case LTU: + fprintf (file, "<{U}"); + break; + case LE: + fprintf (file, "<="); + break; + case LEU: + fprintf (file, "<={U}"); + break; + case GT: + fprintf (file, ">"); + break; + case GTU: + fprintf (file, ">{U}"); + break; + default: + gcc_unreachable(); + } + } + else + { + /* Output the comparison formatted as operand,symbol,operand */ + rtx op0 = XEXP (operand, 0); + rtx op1 = XEXP (operand, 1); + + picochip_print_operand (file, op0, 0); + picochip_print_comparison (file, operand, 'i'); + picochip_print_operand (file, op1, 0); + } +} + +/* This function generates a memory address operand in the given + mode. That is, if the address contains a constant offset, then the + offset is divided by the required mode size to compute the + mode specific offset. By default, picochip_print_operand_address calls + this function using the natural mode of the operand, but special + operand codes can be used to invoke the computation using an + unnatural mode (e.g., compute the HI aligned address of an SI mode + address). */ +static void +picochip_print_memory_address (FILE * file, rtx operand, + enum machine_mode mode) +{ + rtx address = XEXP (operand, 0); + + /* Sanity check. */ + if (MEM != GET_CODE (operand)) + fatal_insn ("picochip_print_memory_address - Operand isn't memory based", + operand); + + if (TARGET_DEBUG) + { + printf ("picochip_print_memory_address: "); + print_rtl (stdout, operand); + printf ("\n"); + } + + switch (GET_CODE (address)) + { + case PLUS: + { + /* Grab the address components. */ + rtx base = XEXP (address, 0); + rtx offset = XEXP (address, 1); + + /* Only handle reg+const addresses */ + if (REG == GET_CODE (base) && CONST_INT == GET_CODE (offset)) + { + /* Sanity check. If an FP+offset address is given, ensure + that the offset lies within the given frame, or a lower + frame. */ + if (REGNO (base) == STACK_POINTER_REGNUM ) + gcc_assert (INTVAL (offset) <= (picochip_arg_area_byte_offset () + + crtl->args.size)); + + /* Print the base register - identical for all modes. */ + fprintf (file, "("); + picochip_print_operand (file, base, 'r'); + fprintf (file, ")"); + + /* Print the constant offset with compensation for the mode. */ + switch (mode) + { + case QImode: + picochip_print_operand (file, offset, 'Q'); + break; + + case HImode: + picochip_print_operand (file, offset, 'H'); + break; + + case SImode: + case SFmode: + picochip_print_operand (file, offset, 'S'); + break; + + case DImode: + picochip_print_operand (file, offset, 'D'); + break; + + default: + gcc_unreachable(); + } + + } + + } + + break; + + case SYMBOL_REF: + picochip_print_operand (file, address, 's'); + break; + + case CONST: + { + rtx inner; + rtx base; + rtx offset; + + inner = XEXP (address, 0); + + /* Sanity check - the CONST memory address must be a base+offset. */ + gcc_assert (PLUS == GET_CODE (inner)); + + base = XEXP (inner, 0); + offset = XEXP (inner, 1); + + fprintf (file, "&_%s%+d", XSTR (base, 0), XINT (offset, 0)); + + break; + } + + case REG: + /* Register operand. Provide a zero offset. */ + fprintf (file, "("); + picochip_print_operand (file, address, 'r'); + fprintf (file, ")0"); + break; + + default: + gcc_unreachable(); + } + +} + +/* Output an operand. Formatting letters allow particular parts of + the operand to be output. */ +void +picochip_print_operand (FILE * file, rtx operand, int letter) +{ + + /* Handle special cases. */ + switch (letter) + { + /* VLIW continuation, for explicit VLIW sequences. */ + case '|': + fprintf (file, "\\"); + return; + + /* ALU selector. */ + case '#': + fputc (picochip_get_vliw_alu_id (), file); + return; + + /* Delay slot specifier. */ + case '>': + /* This should be handled in asm_output_opcode. */ + gcc_unreachable(); + + /* Instruction mnemonics (e.g., lshift becomes LSL). */ + case 'I': + switch (GET_CODE (operand)) + { + case AND: + fprintf (file, "AND"); + break; + case IOR: + fprintf (file, "OR"); + break; + case XOR: + fprintf (file, "XOR"); + break; + case PLUS: + fprintf (file, "ADD"); + break; + case MINUS: + fprintf (file, "SUB"); + break; + default: + gcc_unreachable(); + } + return; + + /* Symbolic instructions (e.g., lshift becomes <<). */ + case 'i': + switch (GET_CODE (operand)) + { + case AND: + fprintf (file, "&"); + break; + case IOR: + fprintf (file, "|"); + break; + case XOR: + fprintf (file, "^"); + break; + case PLUS: + fprintf (file, "+"); + break; + case MINUS: + fprintf (file, "-"); + break; + default: + fprintf (file, "UNKNOWN_INSN"); + break; + } + return; + + default: /* Not a punctuation character - process as normal. */ + break; + } + + switch (GET_CODE (operand)) + { + case REG: + switch (letter) + { + case 'R': + /* Write a range of registers. */ + fprintf (file, "R[%d:%d]", REGNO (operand) + 1, REGNO (operand)); + break; + + case 'U': + /* The upper register of a pair is requested. */ + fprintf (file, "%s", picochip_regnames[REGNO (operand) + 1]); + break; + + case 'L': + /* The lower register of a pair is requested. Equivalent to the + default, but included for completeness. */ + fprintf (file, "%s", picochip_regnames[REGNO (operand)]); + break; + + case 'X': + /* The 3rd register of a DI mode register. */ + fprintf (file, "%s", picochip_regnames[REGNO (operand) + 2]); + break; + + case 'Y': + /* The 4th register of a DI mode register. */ + fprintf (file, "%s", picochip_regnames[REGNO (operand) + 3]); + break; + + default: + fprintf (file, "%s", picochip_regnames[REGNO (operand)]); + } + break; + + case CONST_INT: + /* A range of letters can be used to format integers. The + letters Q/H/S are used to divide the constant by the width of + QI/HI/SI mode integers in bytes. The U/L modifiers are used + to obtain the upper and lower 16-bits of a 32-bit + constant. Where possible, signed numbers are used, since + signed representations of numbers may be more compact (e.g., + 65535 can be represented as -1, which fits into a small + constant, whereas 65535 requires a large constant). */ + switch (letter) + { + case 'Q': + fprintf (file, "%ld", INTVAL (operand)); + break; + + case 'H': + fprintf (file, "%ld", INTVAL (operand) / 2); + break; + + case 'S': + fprintf (file, "%ld", INTVAL (operand) / 4); + break; + + case 'P': + fprintf (file, "%d", exact_log2 (INTVAL(operand))); + break; + + case 'U': + fprintf (file, "%hi", (short) ((INTVAL (operand) >> 16) & 0xFFFF)); + break; + + case 'L': + fprintf (file, "%hi", (short) (INTVAL (operand) & 0xFFFF)); + break; + + default: + fprintf (file, "%ld", INTVAL (operand)); + break; + } + break; + + case CONST_DOUBLE: + { + long val; + REAL_VALUE_TYPE rv; + + if (GET_MODE (operand) != SFmode) + fatal_insn ("Unknown mode in print_operand (CONST_DOUBLE) :", + operand); + REAL_VALUE_FROM_CONST_DOUBLE (rv, operand); + REAL_VALUE_TO_TARGET_SINGLE (rv, val); + + switch (letter) + { + case 'U': + fprintf (file, "%hi", (short) ((val >> 16) & 0xFFFF)); + break; + + case 'L': + fprintf (file, "%hi", (short) (val & 0xFFFF)); + break; + } + + break; + + } + + /* Output a symbol. The output format must match that of + picochip_output_label. */ + case SYMBOL_REF: + /* Ensure that the symbol is marked as referenced. Gcc can + occasionally omit the function bodies when it believes them + to be unreferenced. */ + if (SYMBOL_REF_DECL (operand)) + mark_decl_referenced (SYMBOL_REF_DECL (operand)); + fprintf (file, "&"); + assemble_name (file, XSTR (operand, 0)); + break; + + case LABEL_REF: + /* This format must match that of picochip_output_label. */ + fprintf (file, "&"); + output_asm_label (operand); + break; + + case MEM: + { + rtx addr = XEXP (operand, 0); + + switch (letter) + { + case 'o': + if (PLUS != GET_CODE (addr)) + fatal_insn ("Bad address, not (reg+disp):", addr); + else + picochip_print_operand (file, XEXP (addr, 1), 0); + break; + + case 'M': + /* Output a memory address in byte mode notation (i.e., the + constant address (if any) is the actual byte address. */ + picochip_print_memory_address (file, operand, QImode); + break; + + /* Output a constant offset of the given mode (i.e., divide + the constant by the number of units in the mode to get the + constant). */ + case 'Q': + picochip_print_memory_address (file, operand, QImode); + break; + + case 'H': + picochip_print_memory_address (file, operand, HImode); + break; + + case 'S': + picochip_print_memory_address (file, operand, SImode); + break; + + case 'F': + picochip_print_memory_address (file, operand, SFmode); + break; + + case 'b': + if (PLUS != GET_CODE (addr)) + fatal_insn ("Bad address, not (reg+disp):", addr); + else + picochip_print_operand (file, XEXP (addr, 0), 0); + break; + + /* When the mem operand is (reg + big offset) which cannot + be represented in an instruction as operand, the compiler + automatically generates the instruction to put in (reg + + big offset) into another register. In such cases, it + returns '0' as the character. This needs to be handled + as well. */ + case 0: + case 'r': + if (REG != GET_CODE (addr)) + fatal_insn ("Bad address, not register:", addr); + else + picochip_print_operand (file, addr, 0); + break; + + default: + fprintf (file, "Unknown mem operand - letter %c ", + (char) (letter)); + print_rtl (file, operand); + } + + break; + } + + case CONST: + { + rtx const_exp = XEXP (operand, 0); + + /* Handle constant offsets to symbol references. */ + if (PLUS == GET_CODE (const_exp) && + SYMBOL_REF == GET_CODE (XEXP (const_exp, 0)) && + CONST_INT == GET_CODE (XEXP (const_exp, 1))) + { + + picochip_print_operand (file, XEXP (const_exp, 0), 0); + if (INTVAL (XEXP (const_exp, 1)) >= 0) + fprintf (file, "+"); + /* else use the - from the operand (i.e., AP-2)) */ + + picochip_print_operand (file, XEXP (const_exp, 1), letter); + + } + } + break; + + + case PLUS: + { + /* PLUS expressions are of the form (base + offset). Different + options (analagous to those of memory PLUS expressions) are used + to extract the base and offset components. */ + + switch (letter) + { + case 'b': + picochip_print_operand (file, XEXP (operand, 0), 0); + break; + + case 'o': + picochip_print_operand (file, XEXP (operand, 1), 0); + break; + + default: + + /* If the expression is composed entirely of constants, + evaluate the result. This should only occur with the + picoChip specific comms instructions, which are emitted as + base+offset expressions. */ + if (CONST_INT == GET_CODE (XEXP (operand, 0)) && + CONST_INT == GET_CODE (XEXP (operand, 1))) + { + HOST_WIDE_INT result = (XINT (XEXP (operand, 0), 0) + + XINT (XEXP (operand, 1), 0)); + fprintf (file, "%ld", result); + } + else + { + fprintf (file, "("); + picochip_print_operand (file, XEXP (operand, 0), 0); + fprintf (file, "+"); + picochip_print_operand (file, XEXP (operand, 1), 0); + fprintf (file, ")"); + } + } + + break; + } + + /* Comparison operations. */ + case NE: + case EQ: + case GE: + case GEU: + case LT: + case LTU: + case LE: + case LEU: + case GT: + case GTU: + picochip_print_comparison (file, operand, letter); + return; + + default: + fprintf (stderr, "Unknown operand encountered in %s\n", __FUNCTION__); + print_rtl (file, operand); + break; + + } + +} + +/* Output an operand address */ +void +picochip_print_operand_address (FILE * file, rtx operand) +{ + + switch (GET_CODE (operand)) + { + + case SYMBOL_REF: + /* This format must match that of picochip_output_label. */ + assemble_name (file, XSTR (operand, 0)); + break; + + case CODE_LABEL: + /* Note this format must match that of picochip_output_label. */ + fprintf (file, "_L%d", XINT (operand, 5)); + break; + + case MEM: + /* Pass on to a specialised memory address generator. */ + picochip_print_memory_address (file, operand, GET_MODE (operand)); + break; + + default: + gcc_unreachable(); + + } + +} + + +/* Scheduling functions. */ + +/* Save some of the contents of recog_data. */ +static void +picochip_save_recog_data (void) +{ + picochip_saved_which_alternative = which_alternative; + memcpy (&picochip_saved_recog_data, &recog_data, + sizeof (struct recog_data)); +} + +/* Restore some of the contents of global variable recog_data. */ +static void +picochip_restore_recog_data (void) +{ + which_alternative = picochip_saved_which_alternative; + memcpy (&recog_data, &picochip_saved_recog_data, + sizeof (struct recog_data)); +} + +/* Ensure that no var tracking notes are emitted in the middle of a + three-instruction bundle. */ +static void +reorder_var_tracking_notes (void) +{ + basic_block bb; + FOR_EACH_BB (bb) + { + rtx insn, next; + rtx queue = NULL_RTX; + + for (insn = BB_HEAD (bb); insn != BB_END (bb); insn = next) + { + next = NEXT_INSN (insn); + + if (INSN_P (insn)) + { + /* Emit queued up notes before the first instruction of a bundle. */ + if (GET_MODE (insn) == TImode) + { + while (queue) + { + rtx next_queue = PREV_INSN (queue); + NEXT_INSN (PREV_INSN(insn)) = queue; + PREV_INSN (queue) = PREV_INSN(insn); + PREV_INSN (insn) = queue; + NEXT_INSN (queue) = insn; + queue = next_queue; + } + } + } + else if (NOTE_P (insn) && NOTE_KIND (insn) == NOTE_INSN_VAR_LOCATION) + { + rtx prev = PREV_INSN (insn); + PREV_INSN (next) = prev; + NEXT_INSN (prev) = next; + PREV_INSN (insn) = queue; + queue = insn; + } + } + } +} + +/* Perform machine dependent operations on the rtl chain INSNS. */ +void +picochip_reorg (void) +{ + rtx insn, insn1, vliw_start; + int vliw_insn_location = 0; + + /* We are freeing block_for_insn in the toplev to keep compatibility + with old MDEP_REORGS that are not CFG based. Recompute it now. */ + compute_bb_for_insn (); + + if (optimize == 0) + split_all_insns (); + + if (picochip_schedule_type != DFA_TYPE_NONE) + { + timevar_push (TV_SCHED2); + + /* Process the instruction list, computing the sizes of each + instruction, and consequently branch distances. This can + result in some branches becoming short enough to be treated + as a real branch instruction, rather than an assembly branch + macro which may expand into multiple instructions. The + benefit of shortening branches is that real branch + instructions can be properly DFA scheduled, whereas macro + branches cannot. */ + shorten_branches (get_insns ()); + + /* Do control and data sched analysis again, + and write some more of the results to dump file. */ + + split_all_insns (); + + schedule_ebbs (); + + timevar_pop (TV_SCHED2); + + ggc_collect (); + + if (picochip_schedule_type == DFA_TYPE_SPEED) + { + /* Whenever a VLIW packet is generated, all instructions in + that packet must appear to come from the same source + location. The following code finds all the VLIW packets, + and tags their instructions with the location of the first + instruction from the packet. Clearly this will result in + strange behaviour when debugging the code, but since + debugging and optimisation are being used in conjunction, + strange behaviour is certain to occur anyway. */ + /* Slight bit of change. If the vliw set contains a branch + or call instruction, we pick its location.*/ + for (insn = get_insns (); insn; insn = next_insn (insn)) + { + + /* If this is the first instruction in the VLIW packet, + extract its location. */ + if (GET_MODE (insn) == TImode) + { + vliw_start = insn; + vliw_insn_location = INSN_LOCATOR (insn); + } + if (JUMP_P (insn) || CALL_P(insn)) + { + vliw_insn_location = INSN_LOCATOR (insn); + for (insn1 = vliw_start; insn1 != insn ; insn1 = next_insn (insn1)) + INSN_LOCATOR (insn1) = vliw_insn_location; + } + /* Tag subsequent instructions with the same location. */ + if (INSN_P (insn)) + INSN_LOCATOR (insn) = vliw_insn_location; + } + } + + } + + /* Locate the note marking the end of the function's prologue. If + the note appears in the middle of a VLIW packet, move the note to + the end. This avoids unpleasant consequences such as trying to + emit prologue markers (e.g., .loc/.file directives) in the middle + of VLIW packets. */ + if (picochip_schedule_type == DFA_TYPE_SPEED) + { + rtx prologue_end_note = NULL; + rtx last_insn_in_packet = NULL; + + for (insn = get_insns (); insn; insn = next_insn (insn)) + { + /* The prologue end must be moved to the end of the VLIW packet. */ + if (NOTE_KIND (insn) == NOTE_INSN_PROLOGUE_END) + { + prologue_end_note = insn; + break; + } + } + + /* Find the last instruction in this packet. */ + for (insn = prologue_end_note; insn; insn = next_real_insn (insn)) + { + if (GET_MODE (insn) == TImode) + break; + else + last_insn_in_packet = insn; + } + + if (last_insn_in_packet != NULL) + { + rtx tmp_note = emit_note_after (NOTE_KIND(prologue_end_note), last_insn_in_packet); + memcpy(&NOTE_DATA (tmp_note), &NOTE_DATA(prologue_end_note), sizeof(NOTE_DATA(prologue_end_note))); + delete_insn (prologue_end_note); + } + } + if (picochip_flag_var_tracking) + { + timevar_push (TV_VAR_TRACKING); + variable_tracking_main (); + /* We also have to deal with variable tracking notes in the middle + of VLIW packets. */ + reorder_var_tracking_notes(); + timevar_pop (TV_VAR_TRACKING); + } +} + +/* Return the ALU character identifier for the current + instruction. This will be 0 or 1. */ +static char +picochip_get_vliw_alu_id (void) +{ + int attr_type = 0; + + /* Always use ALU 0 if VLIW scheduling is disabled. */ + if (picochip_schedule_type != DFA_TYPE_SPEED) + return '0'; + + /* Get the attribute type of the instruction. Note that this can + ruin the contents of recog_data, so save/restore around the + call. */ + picochip_save_recog_data (); + attr_type = get_attr_type (picochip_current_prescan_insn); + picochip_restore_recog_data (); + + if (picochip_current_vliw_state.contains_pico_alu_insn) + { + + /* If this a picoAlu insn? If it is, then stuff it into ALU 0, + else it must be the other ALU (either basic or nonCc) + instruction which goes into 1. */ + if (attr_type == TYPE_PICOALU) + return '0'; + else + return '1'; + + } + else if (picochip_current_vliw_state.contains_non_cc_alu_insn) + { + /* Is this the non CC instruction? If it is, then stuff it into + ALU 1, else it must be a picoAlu or basicAlu, in which case + it goes into ALU 0. */ + if (attr_type == TYPE_NONCCALU) + return '1'; + else + return '0'; + } + else + { + /* No picoAlu/nonCc instructions in use, so purely dependent upon + whether an ALU instruction has already been scheduled in this + cycle. */ + switch (picochip_current_vliw_state.num_alu_insns_so_far) + { + case 0: + picochip_current_vliw_state.num_alu_insns_so_far++; + return '0'; + + case 1: + picochip_current_vliw_state.num_alu_insns_so_far++; + return '1'; + + default: + internal_error ("Too many ALU instructions emitted (%d)\n", + picochip_current_vliw_state.num_alu_insns_so_far); + return 'X'; + } + } + +} + +/* Reset any information about the current VLIW packing status. */ +static void +picochip_reset_vliw (rtx insn) +{ + rtx local_insn = insn; + + /* Nothing to do if VLIW scheduling isn't being used. */ + if (picochip_schedule_type != DFA_TYPE_SPEED) + return; + + if (TARGET_DEBUG) + printf ("%s on insn %d\n", __FUNCTION__, INSN_UID (insn)); + + /* Reset. */ + picochip_current_vliw_state.contains_pico_alu_insn = 0; + picochip_current_vliw_state.contains_non_cc_alu_insn = 0; + picochip_current_vliw_state.num_alu_insns_so_far = 0; + picochip_current_vliw_state.num_cfi_labels_deferred = 0; + picochip_current_vliw_state.lm_label_name[0] = 0; + picochip_current_vliw_state.num_insns_in_packet = 0; + + /* Read through the VLIW packet, classifying the instructions where + appropriate. */ + local_insn = insn; + do + { + if (NOTE_P (local_insn)) + { + local_insn = NEXT_INSN (local_insn); + continue; + } + else if (!INSN_P (local_insn)) + break; + else + { + /* It is an instruction, but is it ours? */ + if (INSN_CODE (local_insn) != -1) + { + int attr_type = 0; + + picochip_current_vliw_state.num_insns_in_packet += 1; + + /* Is it a picoAlu or nonCcAlu instruction? Note that the + get_attr_type function can overwrite the values in + the recog_data global, hence this is saved and + restored around the call. Not doing so results in + asm_output_opcode being called with a different + instruction to final_prescan_insn, which is fatal. */ + picochip_save_recog_data (); + attr_type = get_attr_type (local_insn); + picochip_restore_recog_data (); + + if (attr_type == TYPE_PICOALU) + picochip_current_vliw_state.contains_pico_alu_insn = 1; + if (attr_type == TYPE_NONCCALU) + picochip_current_vliw_state.contains_non_cc_alu_insn = 1; + + } + } + + /* Get the next instruction. */ + local_insn = NEXT_INSN (local_insn); + + /* Keep going while the next instruction is part of the same + VLIW packet (i.e., its a valid instruction and doesn't mark + the start of a new VLIW packet. */ + } + while (local_insn && + (GET_MODE (local_insn) != TImode) && (INSN_CODE (local_insn) != -1)); + +} + +int +picochip_sched_reorder (FILE * file, int verbose, + rtx * ready ATTRIBUTE_UNUSED, + int *n_readyp ATTRIBUTE_UNUSED, int clock) +{ + + if (verbose > 0) + fprintf (file, ";;\tClock %d\n", clock); + + return picochip_sched_issue_rate (); + +} + +int +picochip_sched_lookahead (void) +{ + /* It should always be enough to lookahead by 2 insns. Only slot0/1 could + have a conflict. */ + return 2; +} + +int +picochip_sched_issue_rate (void) +{ + return 3; +} + +/* Adjust the scheduling cost between the two given instructions, + which have the given dependency. */ +int +picochip_sched_adjust_cost (rtx insn, rtx link, rtx dep_insn, int cost) +{ + + if (TARGET_DEBUG) + { + printf ("Sched Adjust Cost: %d->%d is %d\n", + INSN_UID (insn), INSN_UID (dep_insn), cost); + + printf (" Dependency type:"); + switch (REG_NOTE_KIND (link)) + { + case 0: + printf ("Data\n"); + break; + case REG_DEP_ANTI: + printf ("ANTI\n"); + break; + case REG_DEP_OUTPUT: + printf ("OUTPUT\n"); + break; + default: + printf ("Unknown (%d)\n", REG_NOTE_KIND (link)); + } + } + + /* Anti-dependencies are used to enforce the ordering between a + * branch, and any subsequent instructions. For example: + * + * BNE someLabel + * ADD.0 r0,r1,r2 + * + * The ADD instruction must execute after the branch, and this is + * enforced using an anti-dependency. Unfortunately, VLIW machines + * are happy to execute anti-dependent instructions in the same + * cycle, which then results in a schedule like the following being + * created: + * + * BNE someLabel \ ADD.0 r0,r1,r2 + * + * The instruction which would normally be conditionally executed + * depending upon the outcome of the branch, is now unconditionally + * executed every time. To prevent this happening, any + * anti-dependencies between a branch and another instruction are + * promoted to become real dependencies. + */ + if ((JUMP_P (dep_insn) || CALL_P(dep_insn)) && REG_NOTE_KIND (link) == REG_DEP_ANTI) + { + + if (TARGET_DEBUG) + printf ("Promoting anti-dependency %d->%d to a true-dependency\n", + INSN_UID (insn), INSN_UID (dep_insn)); + + return 1; + } + + return cost; + +} + +/* Return the minimum of the two values */ +static int +minimum (int a, int b) +{ + if (a < b) + return a; + if (b < a) + return b; + /* I dont expect to get to this function with a==b.*/ + gcc_unreachable(); +} + + +/* This function checks if the memory of the two stores are just off by 2 bytes. + It returns the lower memory operand's index.*/ + +static int +memory_just_off (rtx opnd1, rtx opnd2) +{ + int offset1 = 0, offset2 = 0; + int reg1, reg2; + + if (GET_CODE(XEXP(opnd1, 0)) == PLUS && GET_CODE(XEXP(XEXP(opnd1, 0),1)) == CONST_INT) + { + offset1 = INTVAL(XEXP(XEXP(opnd1, 0), 1)); + reg1 = REGNO(XEXP(XEXP(opnd1, 0), 0)); + } + else + { + reg1 = REGNO(XEXP(opnd1, 0)); + } + if (GET_CODE(XEXP(opnd2, 0)) == PLUS && GET_CODE(XEXP(XEXP(opnd2, 0), 1)) == CONST_INT) + { + offset2 = INTVAL(XEXP(XEXP(opnd2, 0), 1)); + reg2 = REGNO(XEXP(XEXP(opnd2, 0), 0)); + } + else + { + reg2 = REGNO(XEXP(opnd2, 0)); + } + + /* Peepholing 2 STW/LDWs has the restriction that the resulting STL/LDL's address + should be 4 byte aligned. We can currently guarentee that only if the base + address is FP(R13) and the offset is aligned. */ + + if (reg1 == reg2 && reg1 == 13 && abs(offset1-offset2) == 2 && minimum(offset1, offset2) % 4 == 0) + return (minimum(offset1, offset2) == offset1) ? 1:2; + + return 0; +} + +static int +registers_just_off (rtx opnd1, rtx opnd2) +{ + int reg1, reg2; + reg1 = REGNO(opnd1); + reg2 = REGNO(opnd2); + if (abs(reg1-reg2) == 1 && minimum(reg1, reg2) % 2 == 0) + return (minimum(reg1, reg2) == reg1)?1:2; + return 0; +} + +/* Check to see if the two LDWs can be peepholed together into a LDL + They can be if the registers getting loaded into are contiguous + and the memory addresses are contiguous as well. + for eg. + LDW r2,[r11]x + LDW r3,[r11]x+1 + can be merged together into + LDL r[3:2],[r11] + + NOTE: + 1. The LDWs themselves only guarentee that r11 will be a 2-byte + aligned address. Only FP can be assumed to be 4 byte aligned. + 2. The progression of addresses and the register numbers should + be similar. For eg., if you swap r2 and r3 in the above instructions, + the resultant pair cannot be merged. + +*/ +bool +ok_to_peephole_ldw(rtx opnd0, rtx opnd1, rtx opnd2, rtx opnd3) +{ + int memtest=0,regtest=0; + regtest = registers_just_off(opnd1,opnd3); + if (regtest == 0) + return false; + + memtest = memory_just_off(opnd0,opnd2); + if (memtest == 0) + return false; + + if (regtest == memtest) + { + return true; + } + return false; +} + +/* Similar to LDW peephole */ +bool +ok_to_peephole_stw(rtx opnd0, rtx opnd1, rtx opnd2, rtx opnd3) +{ + int memtest=0,regtest=0; + regtest = registers_just_off(opnd1,opnd3); + if (regtest == 0) + return false; + + memtest = memory_just_off(opnd0,opnd2); + if (memtest == 0) + return false; + + if (regtest == memtest) + { + return true; + } + return false; +} + + +/* Generate a SImode register with the register number that is the smaller of the two */ +rtx +gen_min_reg(rtx opnd1,rtx opnd2) +{ + return gen_rtx_REG (SImode, minimum(REGNO(opnd1),REGNO(opnd2))); +} + +/* Generate a SImode memory with the address that is the smaller of the two */ +rtx +gen_SImode_mem(rtx opnd1,rtx opnd2) +{ + int offset1=0,offset2=0; + rtx reg; + if (GET_CODE(XEXP(opnd1,0)) == PLUS && GET_CODE(XEXP(XEXP(opnd1,0),1)) == CONST_INT) + { + offset1 = INTVAL(XEXP(XEXP(opnd1,0),1)); + reg = XEXP(XEXP(opnd1,0),0); + } + else + { + reg = XEXP(opnd1,0); + } + if (GET_CODE(XEXP(opnd2,0)) == PLUS && GET_CODE(XEXP(XEXP(opnd2,0),1)) == CONST_INT) + { + offset2 = INTVAL(XEXP(XEXP(opnd2,0),1)); + } + rtx address = gen_rtx_PLUS (HImode, reg, GEN_INT(minimum(offset1,offset2))); + return gen_rtx_MEM(SImode,address); +} + +bool +picochip_rtx_costs (rtx x, int code, int outer_code ATTRIBUTE_UNUSED, int* total) +{ + + int localTotal = 0; + + if (optimize_size) + { + /* Need to penalize immediates that need to be encoded as long constants.*/ + if (code == CONST_INT && !(INTVAL (x) >= 0 && INTVAL (x) < 16)) + { + *total = COSTS_N_INSNS(1); + return true; + } + } + switch (code) + { + case SYMBOL_REF: + case LABEL_REF: + *total = COSTS_N_INSNS (outer_code != MEM); + return true; + break; + + case IF_THEN_ELSE: + /* if_then_else come out of cbranch instructions. It will get split into + a condition code generating subtraction and a branch */ + *total = COSTS_N_INSNS (2); + return true; + break; + + case AND: + case IOR: + case XOR: + if (GET_MODE(x) == SImode) + *total = COSTS_N_INSNS (2); + if (GET_MODE(x) == DImode) + *total = COSTS_N_INSNS (4); + return false; + + case MEM: + /* Byte Memory access on a NO_BYTE_ACCESS machine would be expensive */ + if (GET_MODE(x) == QImode && !TARGET_HAS_BYTE_ACCESS) + *total = COSTS_N_INSNS (10); + + /* 64-bit accesses have to be done through 2 32-bit access */ + if (GET_MODE(x) == DImode) + *total = COSTS_N_INSNS (2); + return false; + break; + + case ASHIFTRT: + + /* SImode shifts are expensive */ + if (GET_MODE(x) == SImode) + *total = COSTS_N_INSNS (10); + + /* Register shift by constant is cheap. */ + if ((GET_MODE(x) == QImode || GET_MODE(x) == HImode) + && GET_CODE(XEXP(x, 0)) == REG + && GET_CODE(XEXP(x, 1)) == CONST_INT) + *total = COSTS_N_INSNS (1); + else + *total = COSTS_N_INSNS (4); + return false; + break; + + case DIV: + case MOD: + + /* Divisions are more expensive than the default 7*/ + if (GET_MODE(x) == SImode) + *total = COSTS_N_INSNS (20); + else + *total = COSTS_N_INSNS (12); + return false; + break; + + case MULT: + /* Look for the simple cases of multiplying register*register or + register*constant. */ + if ((GET_MODE(x) == QImode || GET_MODE(x) == HImode) + && ((GET_CODE(XEXP(x, 0)) == REG + && (GET_CODE(XEXP(x, 1)) == REG || GET_CODE(XEXP(x,1)) == CONST_INT)) + || (GET_CODE(XEXP(x, 0)) == ZERO_EXTEND + && GET_CODE(XEXP(XEXP(x, 0),0)) == REG + && GET_CODE(XEXP(x, 1)) == ZERO_EXTEND + && GET_CODE(XEXP(XEXP(x, 1),0)) == REG))) + { + + /* When optimising for size, multiplication by constant + should be discouraged slightly over multiplication by a + register. */ + if (picochip_has_mac_unit) + { + /* Single cycle multiplication, but the result must be + loaded back into a general register afterwards. */ + *total = COSTS_N_INSNS(2); + return true; + } + else if (picochip_has_mul_unit) + { + /* Single cycle multiplication. */ + *total = COSTS_N_INSNS(1); + return true; + } + /* Else no multiply available. Use default cost. */ + + } + break; + + default: + /* Do nothing. */ + break; + } + + if (localTotal != 0) + { + *total = localTotal; + return true; + } + else + { + return false; + } + +} + +void +picochip_final_prescan_insn (rtx insn, rtx * opvec ATTRIBUTE_UNUSED, + int num_operands ATTRIBUTE_UNUSED) +{ + rtx local_insn; + + picochip_current_prescan_insn = insn; + + if (TARGET_DEBUG) + printf ("Final prescan on INSN %d with mode %s\n", + INSN_UID (insn), GET_MODE_NAME (GET_MODE (insn))); + + /* If this is the start of a new instruction cycle, or no scheduling + is used, then reset the VLIW status. */ + if (GET_MODE (insn) == TImode || !picochip_schedule_type == DFA_TYPE_SPEED) + picochip_reset_vliw (insn); + + /* No VLIW scheduling occured, so don't go any further. */ + if (picochip_schedule_type != DFA_TYPE_SPEED) + return; + + /* Look for the next printable instruction. This loop terminates on + any recognisable instruction, and on any unrecognisable + instruction with TImode. */ + local_insn = insn; + for (local_insn = NEXT_INSN (local_insn); local_insn; + local_insn = NEXT_INSN (local_insn)) + { + if (NOTE_P (local_insn)) + continue; + else if (!INSN_P (local_insn)) + break; + else if (GET_MODE (local_insn) == TImode + || INSN_CODE (local_insn) != -1) + break; + } + + /* Set the continuation flag if the next instruction can be packed + with the current instruction (i.e., the next instruction is + valid, and isn't the start of a new cycle). */ + picochip_vliw_continuation = (local_insn && INSN_P (local_insn) && + (GET_MODE (local_insn) != TImode)); + +} + +/* Builtin functions. */ +/* Given a builtin function taking 2 operands (i.e., target + source), + emit the RTL for the underlying instruction. */ +static rtx +picochip_expand_builtin_2op (enum insn_code icode, tree arglist, rtx target) +{ + tree arg0; + rtx op0, pat; + enum machine_mode tmode, mode0; + + /* Grab the incoming argument and emit its RTL. */ + arg0 = TREE_VALUE (arglist); + op0 = expand_expr (arg0, NULL_RTX, VOIDmode, 0); + + /* Determine the modes of the instruction operands. */ + tmode = insn_data[icode].operand[0].mode; + mode0 = insn_data[icode].operand[1].mode; + + /* Ensure that the incoming argument RTL is in a register of the + correct mode. */ + if (!(*insn_data[icode].operand[1].predicate) (op0, mode0)) + op0 = copy_to_mode_reg (mode0, op0); + + /* If there isn't a suitable target, emit a target register. */ + if (target == 0 + || GET_MODE (target) != tmode + || !(*insn_data[icode].operand[0].predicate) (target, tmode)) + target = gen_reg_rtx (tmode); + + /* Emit and return the new instruction. */ + pat = GEN_FCN (icode) (target, op0); + if (!pat) + return 0; + emit_insn (pat); + + return target; + +} + +/* Given a builtin function taking 3 operands (i.e., target + two + source), emit the RTL for the underlying instruction. */ +static rtx +picochip_expand_builtin_3op (enum insn_code icode, tree arglist, rtx target) +{ + tree arg0, arg1; + rtx op0, op1, pat; + enum machine_mode tmode, mode0, mode1; + + /* Grab the function's arguments. */ + arg0 = TREE_VALUE (arglist); + arg1 = TREE_VALUE (TREE_CHAIN (arglist)); + + /* Emit rtl sequences for the function arguments. */ + op0 = expand_expr (arg0, NULL_RTX, VOIDmode, 0); + op1 = expand_expr (arg1, NULL_RTX, VOIDmode, 0); + + /* Get the mode's of each of the instruction operands. */ + tmode = insn_data[icode].operand[0].mode; + mode0 = insn_data[icode].operand[1].mode; + mode1 = insn_data[icode].operand[2].mode; + + /* Ensure that each of the function argument rtl sequences are in a + register of the correct mode. */ + if (!(*insn_data[icode].operand[1].predicate) (op0, mode0)) + op0 = copy_to_mode_reg (mode0, op0); + if (!(*insn_data[icode].operand[2].predicate) (op1, mode1)) + op1 = copy_to_mode_reg (mode1, op1); + + /* If no target has been given, create a register to use as the target. */ + if (target == 0 + || GET_MODE (target) != tmode + || !(*insn_data[icode].operand[0].predicate) (target, tmode)) + target = gen_reg_rtx (tmode); + + /* Emit and return the new instruction. */ + pat = GEN_FCN (icode) (target, op0, op1); + if (!pat) + return 0; + emit_insn (pat); + + return target; + +} + +/* Expand a builtin function which takes two arguments, and returns a void. */ +static rtx +picochip_expand_builtin_2opvoid (enum insn_code icode, tree arglist) +{ + tree arg0, arg1; + rtx op0, op1, pat; + enum machine_mode mode0, mode1; + + /* Grab the function's arguments. */ + arg0 = TREE_VALUE (arglist); + arg1 = TREE_VALUE (TREE_CHAIN (arglist)); + + /* Emit rtl sequences for the function arguments. */ + op0 = expand_expr (arg0, NULL_RTX, VOIDmode, 0); + op1 = expand_expr (arg1, NULL_RTX, VOIDmode, 0); + + /* Get the mode's of each of the instruction operands. */ + mode0 = insn_data[icode].operand[0].mode; + mode1 = insn_data[icode].operand[1].mode; + + /* Ensure that each of the function argument rtl sequences are in a + register of the correct mode. */ + if (!(*insn_data[icode].operand[0].predicate) (op0, mode0)) + op0 = copy_to_mode_reg (mode0, op0); + if (!(*insn_data[icode].operand[1].predicate) (op1, mode1)) + op1 = copy_to_mode_reg (mode1, op1); + + /* Emit and return the new instruction. */ + pat = GEN_FCN (icode) (op0, op1); + if (!pat) + return 0; + emit_insn (pat); + + return NULL_RTX; + +} + +/* Expand an array get into the corresponding RTL. */ +static rtx +picochip_expand_array_get (tree arglist, rtx target) +{ + tree arg0, arg1, arg2; + rtx op0, op1, op2, pat; + + /* Grab the function's arguments. */ + arg0 = TREE_VALUE (arglist); + arg1 = TREE_VALUE (TREE_CHAIN (arglist)); + arg2 = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))); + + /* Emit rtl sequences for the function arguments. */ + op0 = expand_expr (arg0, NULL_RTX, VOIDmode, 0); + op1 = expand_expr (arg1, NULL_RTX, VOIDmode, 0); + op2 = expand_expr (arg2, NULL_RTX, VOIDmode, 0); + + /* The second and third operands must be constant. Nothing else will + do. */ + if (CONST_INT != GET_CODE (op1)) + internal_error ("%s: Second source operand is not a constant", + __FUNCTION__); + if (CONST_INT != GET_CODE (op2)) + internal_error ("%s: Third source operand is not a constant", + __FUNCTION__); + + /* If no target has been given, create a register to use as the target. */ + if (target == 0 || GET_MODE (target) != SImode) + target = gen_reg_rtx (SImode); + + /* The first operand must be a HImode register or a constant. If it + isn't, force it into a HImode register. */ + if (GET_MODE (op0) != HImode || REG != GET_CODE (op0)) + op0 = copy_to_mode_reg (HImode, op0); + + + /* Emit and return the new instruction. */ + pat = gen_commsArrayGet (target, op0, op1, op2); + emit_insn (pat); + + return target; + +} + +/* Expand an array put into the corresponding RTL. */ +static rtx +picochip_expand_array_put (tree arglist, rtx target) +{ + tree arg0, arg1, arg2, arg3; + rtx op0, op1, op2, op3, pat; + + /* Grab the function's arguments. */ + arg0 = TREE_VALUE (arglist); + arg1 = TREE_VALUE (arglist->common.chain); + arg2 = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))); + arg3 = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (TREE_CHAIN (arglist)))); + + /* Emit rtl sequences for the function arguments. */ + op0 = expand_expr (arg0, NULL_RTX, VOIDmode, 0); + op1 = expand_expr (arg1, NULL_RTX, VOIDmode, 0); + op2 = expand_expr (arg2, NULL_RTX, VOIDmode, 0); + op3 = expand_expr (arg3, NULL_RTX, VOIDmode, 0); + + /* The first operand must be an SImode register. */ + if (GET_MODE (op0) != SImode || REG != GET_CODE (op0)) + op0 = copy_to_mode_reg (SImode, op0); + + /* The second (index) operand must be a HImode register, or a + constant. If it isn't, force it into a HImode register. */ + if (GET_MODE (op1) != HImode || REG != GET_CODE (op1)) + op1 = copy_to_mode_reg (HImode, op1); + + /* The remaining operands must be constant. Nothing else will do. */ + if (CONST_INT != GET_CODE (op2)) + internal_error ("%s: Third source operand is not a constant", + __FUNCTION__); + if (CONST_INT != GET_CODE (op3)) + internal_error ("%s: Fourth source operand is not a constant", + __FUNCTION__); + + /* Emit and return the new instruction. */ + pat = gen_commsArrayPut (op0, op1, op2, op3); + emit_insn (pat); + + return target; + +} + +/* Expand an array testport into the corresponding RTL. */ +static rtx +picochip_expand_array_testport (tree arglist, rtx target) +{ + tree arg0, arg1, arg2; + rtx op0, op1, op2, pat; + + /* Grab the function's arguments. */ + arg0 = TREE_VALUE (arglist); + arg1 = TREE_VALUE (TREE_CHAIN (arglist)); + arg2 = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))); + + /* Emit rtl sequences for the function arguments. */ + op0 = expand_expr (arg0, NULL_RTX, VOIDmode, 0); + op1 = expand_expr (arg1, NULL_RTX, VOIDmode, 0); + op2 = expand_expr (arg2, NULL_RTX, VOIDmode, 0); + + /* The first operand must be a HImode register, or a constant. If it + isn't, force it into a HImode register. */ + if (GET_MODE (op0) != HImode || REG != GET_CODE (op0)) + op0 = copy_to_mode_reg (HImode, op0); + + /* The second and third operands must be constant. Nothing else will + do. */ + if (CONST_INT != GET_CODE (op1)) + internal_error ("%s: Second source operand is not a constant", + __FUNCTION__); + if (CONST_INT != GET_CODE (op2)) + internal_error ("%s: Third source operand is not a constant", + __FUNCTION__); + + /* If no target has been given, create a HImode register to use as + the target. */ + if (target == 0 || GET_MODE (target) != HImode) + target = gen_reg_rtx (HImode); + + /* Emit and return the new instruction. */ + pat = gen_commsArrayTestPort (target, op0, op1, op2); + emit_insn (pat); + + return target; + +} + +/* Generate a unique HALT instruction by giving the instruction a + unique integer. This integer makes no difference to the assembly + output (other than a comment indicating the supplied id), but the + presence of the unique integer prevents the compiler from combining + several different halt instructions into one instruction. This + means that each use of the halt instruction is unique, which in + turn means that assertions work as expected. */ +static rtx +picochip_generate_halt (void) +{ + static int currentId = 0; + rtx id = GEN_INT (currentId); + currentId += 1; + + start_sequence(); + emit_insn (gen_halt (id)); + + /* A barrier is inserted to prevent the compiler from thinking that + it has to continue execution after the HALT.*/ + emit_barrier (); + + rtx insns = get_insns(); + end_sequence(); + emit_insn (insns); + + return const0_rtx; +} + +static rtx +picochip_generate_profile (tree arglist) +{ + tree arg0 = TREE_VALUE (arglist); + rtx op0 = expand_expr (arg0, NULL_RTX, VOIDmode, 0); + + start_sequence(); + emit_insn (gen_profile (op0)); + + rtx insns = get_insns(); + end_sequence(); + emit_insn (insns); + + return const0_rtx; +} + + +/* Initialise the builtin functions. Start by initialising + descriptions of different types of functions (e.g., void fn(int), + int fn(void)), and then use these to define the builtins. */ +void +picochip_init_builtins (void) +{ + tree endlink = void_list_node; + tree int_endlink = tree_cons (NULL_TREE, integer_type_node, endlink); + tree long_endlink = tree_cons (NULL_TREE, long_integer_type_node, endlink); + tree int_int_endlink = + tree_cons (NULL_TREE, integer_type_node, int_endlink); + tree int_int_int_endlink = + tree_cons (NULL_TREE, integer_type_node, int_int_endlink); + tree int_long_endlink = + tree_cons (NULL_TREE, integer_type_node, long_endlink); + tree pchar_type_node = build_pointer_type (char_type_node); + tree long_int_int_int_endlink = + tree_cons (NULL_TREE, long_integer_type_node, int_int_int_endlink); + + tree int_ftype_void, int_ftype_int, int_ftype_int_int, void_ftype_pchar; + tree long_ftype_int, long_ftype_int_int, long_ftype_int_int_int; + tree void_ftype_int_long, int_ftype_int_int_int, + void_ftype_long_int_int_int; + tree void_ftype_void, void_ftype_int; + + /* void func (void) */ + void_ftype_void = build_function_type (void_type_node, endlink); + + /* void func (void *) */ + void_ftype_pchar + = build_function_type (void_type_node, + tree_cons (NULL_TREE, pchar_type_node, endlink)); + + /* int func (void) */ + int_ftype_void = build_function_type (integer_type_node, endlink); + + /* void func (int) */ + void_ftype_int = build_function_type (void_type_node, int_endlink); + + /* int func (int) */ + int_ftype_int = build_function_type (integer_type_node, int_endlink); + + /* int func(int, int) */ + int_ftype_int_int + = build_function_type (integer_type_node, int_int_endlink); + + /* long func(int) */ + long_ftype_int = build_function_type (long_integer_type_node, int_endlink); + + /* long func(int, int) */ + long_ftype_int_int + = build_function_type (long_integer_type_node, int_int_endlink); + + /* long func(int, int, int) */ + long_ftype_int_int_int + = build_function_type (long_integer_type_node, int_int_int_endlink); + + /* int func(int, int, int) */ + int_ftype_int_int_int + = build_function_type (integer_type_node, int_int_int_endlink); + + /* void func(int, long) */ + void_ftype_int_long + = build_function_type (void_type_node, int_long_endlink); + + /* void func(long, int, int, int) */ + void_ftype_long_int_int_int + = build_function_type (void_type_node, long_int_int_int_endlink); + + /* Initialise the sign-bit-count function. */ + add_builtin_function ("__builtin_sbc", int_ftype_int, + PICOCHIP_BUILTIN_SBC, BUILT_IN_MD, NULL, + NULL_TREE); + add_builtin_function ("picoSbc", int_ftype_int, PICOCHIP_BUILTIN_SBC, + BUILT_IN_MD, NULL, NULL_TREE); + + /* Initialise the bit reverse function. */ + add_builtin_function ("__builtin_profile", void_ftype_int, + PICOCHIP_BUILTIN_PROFILE, BUILT_IN_MD, NULL, + NULL_TREE); + add_builtin_function ("picoProfile", void_ftype_int, + PICOCHIP_BUILTIN_PROFILE, BUILT_IN_MD, NULL, + NULL_TREE); + + /* Initialise the bit reverse function. */ + add_builtin_function ("__builtin_brev", int_ftype_int, + PICOCHIP_BUILTIN_BREV, BUILT_IN_MD, NULL, + NULL_TREE); + add_builtin_function ("picoBrev", int_ftype_int, + PICOCHIP_BUILTIN_BREV, BUILT_IN_MD, NULL, + NULL_TREE); + + /* Initialise the byte swap function. */ + add_builtin_function ("__builtin_byteswap", int_ftype_int, + PICOCHIP_BUILTIN_BYTESWAP, BUILT_IN_MD, NULL, + NULL_TREE); + add_builtin_function ("picoByteSwap", int_ftype_int, + PICOCHIP_BUILTIN_BYTESWAP, BUILT_IN_MD, NULL, + NULL_TREE); + + /* Initialise the ASRI function (note that while this can be coded + using a signed shift in C, extra scratch registers are required, + which we avoid by having a direct builtin to map to the + instruction). */ + add_builtin_function ("__builtin_asri", int_ftype_int_int, + PICOCHIP_BUILTIN_ASRI, BUILT_IN_MD, NULL, + NULL_TREE); + + /* Initialise saturating addition. */ + add_builtin_function ("__builtin_adds", int_ftype_int_int, + PICOCHIP_BUILTIN_ADDS, BUILT_IN_MD, NULL, + NULL_TREE); + add_builtin_function ("picoAdds", int_ftype_int_int, + PICOCHIP_BUILTIN_ADDS, BUILT_IN_MD, NULL, + NULL_TREE); + + /* Initialise saturating subtraction. */ + add_builtin_function ("__builtin_subs", int_ftype_int_int, + PICOCHIP_BUILTIN_SUBS, BUILT_IN_MD, NULL, + NULL_TREE); + add_builtin_function ("picoSubs", int_ftype_int_int, + PICOCHIP_BUILTIN_SUBS, BUILT_IN_MD, NULL, + NULL_TREE); + + /* Scalar comms builtins. */ + add_builtin_function ("__builtin_get", long_ftype_int, + PICOCHIP_BUILTIN_GET, BUILT_IN_MD, NULL, + NULL_TREE); + add_builtin_function ("__builtin_put", void_ftype_int_long, + PICOCHIP_BUILTIN_PUT, BUILT_IN_MD, NULL, + NULL_TREE); + add_builtin_function ("__builtin_testport", int_ftype_int, + PICOCHIP_BUILTIN_TESTPORT, BUILT_IN_MD, NULL, + NULL_TREE); + + /* Array comms builtins. */ + add_builtin_function ("__builtin_put_array", + void_ftype_long_int_int_int, + PICOCHIP_BUILTIN_PUT_ARRAY, BUILT_IN_MD, NULL, + NULL_TREE); + add_builtin_function ("__builtin_get_array", long_ftype_int_int_int, + PICOCHIP_BUILTIN_GET_ARRAY, BUILT_IN_MD, NULL, + NULL_TREE); + add_builtin_function ("__builtin_testport_array", + int_ftype_int_int_int, + PICOCHIP_BUILTIN_TESTPORT_ARRAY, BUILT_IN_MD, + NULL, NULL_TREE); + + /* Halt instruction. Note that the builtin function is marked as + having the attribute `noreturn' so that the compiler realises + that the halt stops the program dead. */ + tree noreturn = tree_cons (get_identifier ("noreturn"), NULL, NULL); + add_builtin_function ("__builtin_halt", void_ftype_void, + PICOCHIP_BUILTIN_HALT, BUILT_IN_MD, NULL, + noreturn); + add_builtin_function ("picoHalt", void_ftype_void, + PICOCHIP_BUILTIN_HALT, BUILT_IN_MD, NULL, + noreturn); + +} + +/* Expand a call to a builtin function. */ +rtx +picochip_expand_builtin (tree exp, rtx target, rtx subtarget ATTRIBUTE_UNUSED, + enum machine_mode mode ATTRIBUTE_UNUSED, + int ignore ATTRIBUTE_UNUSED) +{ + tree fndecl = TREE_OPERAND (CALL_EXPR_FN (exp), 0); + tree arglist = CALL_EXPR_ARGS(exp); + int fcode = DECL_FUNCTION_CODE (fndecl); + + switch (fcode) + { + case PICOCHIP_BUILTIN_ASRI: + return picochip_expand_builtin_3op (CODE_FOR_builtin_asri, arglist, + target); + + case PICOCHIP_BUILTIN_ADDS: + return picochip_expand_builtin_3op (CODE_FOR_sataddhi3, arglist, + target); + + case PICOCHIP_BUILTIN_SUBS: + return picochip_expand_builtin_3op (CODE_FOR_satsubhi3, arglist, + target); + + case PICOCHIP_BUILTIN_SBC: + return picochip_expand_builtin_2op (CODE_FOR_sbc, arglist, target); + + case PICOCHIP_BUILTIN_BREV: + return picochip_expand_builtin_2op (CODE_FOR_brev, arglist, target); + + case PICOCHIP_BUILTIN_BYTESWAP: + return picochip_expand_builtin_2op (CODE_FOR_bswaphi2, arglist, target); + + case PICOCHIP_BUILTIN_GET: + return picochip_expand_builtin_2op (CODE_FOR_commsGet, arglist, target); + + case PICOCHIP_BUILTIN_PUT: + return picochip_expand_builtin_2opvoid (CODE_FOR_commsPut, arglist); + + case PICOCHIP_BUILTIN_TESTPORT: + return picochip_expand_builtin_2op (CODE_FOR_commsTestPort, arglist, + target); + + case PICOCHIP_BUILTIN_PUT_ARRAY: + return picochip_expand_array_put (arglist, target); + + case PICOCHIP_BUILTIN_GET_ARRAY: + return picochip_expand_array_get (arglist, target); + + case PICOCHIP_BUILTIN_TESTPORT_ARRAY: + return picochip_expand_array_testport (arglist, target); + + case PICOCHIP_BUILTIN_HALT: + return picochip_generate_halt (); + + case PICOCHIP_BUILTIN_PROFILE: + return picochip_generate_profile (arglist); + + default: + gcc_unreachable(); + + } + + /* Should really do something sensible here. */ + return NULL_RTX; +} + +/* Emit warnings. */ +static void +picochip_warn_inefficient (const char *msg) +{ + if (TARGET_INEFFICIENT_WARNINGS) + warning (OPT_minefficient_warnings, + "%s (disable warning using -mno-inefficient-warnings)", msg); +} + +void +warn_of_byte_access (void) +{ + static int warned = 0; + + if (!warned) + { + picochip_warn_inefficient + ("byte access is synthesised - consider using MUL AE"); + warned = 1; + } + +} + +rtx +picochip_function_value (const_tree valtype, const_tree func ATTRIBUTE_UNUSED, + bool outgoing ATTRIBUTE_UNUSED) +{ + enum machine_mode mode = TYPE_MODE (valtype); + int unsignedp = TYPE_UNSIGNED (valtype); + + /* Since we define PROMOTE_FUNCTION_RETURN, we must promote the mode + just as PROMOTE_MODE does. */ + mode = promote_mode (valtype, mode, &unsignedp, 1); + + return gen_rtx_REG (mode, 0); + +} + +/* Check that the value of the given mode will fit in the register of + the given mode. */ +int +picochip_hard_regno_mode_ok (int regno, enum machine_mode mode) +{ + + if (GET_MODE_CLASS (mode) == MODE_CC) + return regno == CC_REGNUM; + + /* If the CC register is being used, then only CC mode values are + allowed (which have already been tested). */ + if (regno == CC_REGNUM || regno == ACC_REGNUM) + return 0; + + /* Must be a valid register. */ + if (regno > 16) + return 0; + + /* Modes QI and HI may be placed in any register except the CC. */ + if (mode == QImode || mode == HImode) + return 1; + + /* DI must be in a quad register. */ + if (mode == DImode) + return (regno % 4 == 0); + + /* All other modes must be placed in a even numbered register. */ + return !(regno & 1); + +} + +/* Extract the lower and upper components of a constant value. */ + +rtx +picochip_get_low_const (rtx value) +{ + return gen_int_mode (INTVAL (value) & 0xFFFF, HImode); +} + +rtx +picochip_get_high_const (rtx value) +{ + /*return GEN_INT ((((INTVAL (value) >> 16) & 0xFFFF) ^ 0x8000) - 0x8000); */ + return gen_int_mode ((INTVAL (value) >> 16) & 0xFFFF, HImode); +} + + +/* Loading and storing QImode values to and from memory in a machine + without byte access requires might require a scratch + register. However, the scratch register might correspond to the + register in which the value is being loaded. To ensure that a + scratch register is supplied which is definitely different to the + output register, request a register pair. This effectively gives a + choice of two registers to choose from, so that we a guaranteed to + get at least one register which is different to the output + register. This trick is taken from the alpha implementation. */ +enum reg_class +picochip_secondary_reload (bool in_p, + rtx x ATTRIBUTE_UNUSED, + enum reg_class cla ATTRIBUTE_UNUSED, + enum machine_mode mode, + secondary_reload_info *sri) +{ + if (mode == QImode && !TARGET_HAS_BYTE_ACCESS) + { + if (in_p == 0) + sri->icode = CODE_FOR_reload_outqi; + else + sri->icode = CODE_FOR_reload_inqi; + } + + /* We dont need to return a register class type when we need only a + scratch register. It realizes the scratch register type by looking + at the instruction definition for sri->icode. We only need to + return the register type when we need intermediaries for copies.*/ + return NO_REGS; +} + +/* Return true if the given memory operand can be aligned to a + word+offset memory reference (e.g., FP+3 can be converted into the + memory operand FP+2, with the offset 1). */ +int +picochip_alignable_memory_operand (rtx mem_operand, + enum machine_mode mode ATTRIBUTE_UNUSED) +{ + rtx address; + + /* Not a mem operand. Refuse immediately. */ + if (MEM != GET_CODE (mem_operand)) + return 0; + + address = XEXP (mem_operand, 0); + + /* Return true if a PLUS of the SP and a (valid) constant, or SP itself. */ + return ((PLUS == GET_CODE (address) && + REGNO (XEXP (address, 0)) == STACK_POINTER_REGNUM && + CONST_INT == GET_CODE (XEXP (address, 1)) && + picochip_const_ok_for_letter_p (INTVAL (XEXP (address, 1)), 'K')) + || (REG == GET_CODE (address) + && REGNO (address) == STACK_POINTER_REGNUM)); + +} + +/* Return true if the given memory reference is to a word aligned + address. Currently this means it must be either SP, or + SP+offset. We could replace this function with alignable + memory references in the above function?. */ +int +picochip_word_aligned_memory_reference (rtx operand) +{ + + + /* The address must be the SP register, or a constant, aligned + offset from SP which doesn't exceed the FP+offset + restrictions. */ + return ((PLUS == GET_CODE (operand) + && REGNO (XEXP (operand, 0)) == STACK_POINTER_REGNUM + && picochip_is_aligned (INTVAL (XEXP (operand, 1)), 16) + && picochip_const_ok_for_letter_p (INTVAL (XEXP (operand, 1)), + 'K')) + || (REG == GET_CODE (operand) + && REGNO (operand) == STACK_POINTER_REGNUM)); + +} + +/* Given an alignable memory location, convert the memory location + into a HI mode access, storing the new memory reference in + paligned_mem, and the number of bits by which to shift in pbitnum + (i.e., given a reference to FP+3, this creates an aligned reference + of FP+2, with an 8-bit shift). This code is a modification of that + found in the Alpha port. */ +void +picochip_get_hi_aligned_mem (rtx ref, rtx * paligned_mem, rtx * pbitnum) +{ + rtx base; + HOST_WIDE_INT offset = 0; + + gcc_assert (GET_CODE (ref) == MEM); + + if (reload_in_progress && !memory_address_p (GET_MODE (ref), XEXP (ref, 0))) + { + base = find_replacement (&XEXP (ref, 0)); + + gcc_assert(memory_address_p (GET_MODE (ref), base)); + } + else + { + base = XEXP (ref, 0); + } + + if (GET_CODE (base) == PLUS) + { + offset += INTVAL (XEXP (base, 1)); + base = XEXP (base, 0); + } + + *paligned_mem = widen_memory_access (ref, HImode, (offset & ~1) - offset); + + if (offset > 0) + { + if (TARGET_DEBUG) + { + printf + ("Found non-zero offset in get_hi_aligned_mem - check that the correct value is being used (as this functionality hasn't been exploited yet).\n"); + } + } + + *pbitnum = GEN_INT ((offset & 1) * 8); + +} + +/* Return true if the given operand is an absolute address in memory + (i.e., a symbolic offset). */ +int +picochip_absolute_memory_operand (rtx op, + enum machine_mode mode ATTRIBUTE_UNUSED) +{ + + if (MEM == GET_CODE (op)) + { + rtx address = XEXP (op, 0); + + /* Symbols are valid absolute addresses. */ + if (SYMBOL_REF == GET_CODE (address)) + return 1; + + /* Constant offsets to symbols are valid absolute addresses. */ + if (CONST == GET_CODE (address) && + PLUS == GET_CODE (XEXP (address, 0)) && + SYMBOL_REF == GET_CODE (XEXP (XEXP (address, 0), 0)) && + CONST_INT == GET_CODE (XEXP (XEXP (address, 0), 1))) + return 1; + + } + else + return 0; + + /* Symbols are valid absolute addresses. */ + if (SYMBOL_REF == GET_CODE (XEXP (op, 0))) + return 1; + + + return 0; + +} + +void +picochip_asm_named_section (const char *name, + unsigned int flags ATTRIBUTE_UNUSED, + tree decl ATTRIBUTE_UNUSED) +{ + fprintf (asm_out_file, ".section %s\n", name); +} + + +/* Check if we can make a conditional copy instruction. This is emitted as an + instruction to set the condition register, followed by an instruction which + uses the condition registers to perform the conditional move. */ +int +picochip_check_conditional_copy (rtx * operands) +{ + + rtx branch_op_0 = XEXP (operands[1], 0); + rtx branch_op_1 = XEXP (operands[1], 1); + + /* Only HI mode conditional moves are currently allowed. Can we add + SI mode moves? */ + if (GET_CODE (operands[1]) != EQ && GET_CODE (operands[1]) != NE) + return 0; + + /* Is the comparison valid? Only allow operands which are registers + if they are HImode. SI mode comparisons against 0 could be + handled using logical operations (e.g., SIreg != 0 when low || + high). Need to find test cases to provoke this though (fixunssfdi + in libgcc does, but is complicated). */ + if (GET_MODE (branch_op_0) != HImode || + !(register_operand (branch_op_0, GET_MODE (branch_op_0)))) + return 0; + if (GET_MODE (branch_op_1) != HImode || + !(picochip_comparison_operand (branch_op_1, GET_MODE (branch_op_1)))) + return 0; + + return 1; + +} + diff --git a/config/picochip/picochip.h b/config/picochip/picochip.h new file mode 100644 index 0000000..6c92fb4 --- /dev/null +++ b/config/picochip/picochip.h @@ -0,0 +1,749 @@ +/* Definitions of target machine for GNU compiler for picoChip + Copyright (C) 2001, 2008 Free Software Foundation, Inc. + + Contributed by picoChip Designs Ltd. (http://www.picochip.com) + Maintained by Daniel Towner (daniel.towner@picochip.com) and + Hariharan Sandanagobalane (hariharan@picochip.com). + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 3, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING3. If not, see +. */ + +/* Which type of DFA scheduling to use - schedule for speed (VLIW), or + schedule for space. When scheduling for space, attempt to schedule + into stall cycles, but don't pack instructions. */ + +enum picochip_dfa_type +{ + DFA_TYPE_NONE, + DFA_TYPE_SPACE, + DFA_TYPE_SPEED +}; + +extern enum picochip_dfa_type picochip_schedule_type; + +/* Controlling the Compilation Driver */ + +/* Pass through the save-temps command option. */ +#define LINK_SPEC " %{save-temps:--save-temps}" + +/* This is an embedded processor, and only supports a cut-down version of + * the standard C library. */ +#define LIB_SPEC "-lpicoC" + +/* The start file is automatically provided by the linker. */ +#define STARTFILE_SPEC "" + +/* Run-time Target Specification */ + +/* Define some additional pre-processor macros. */ +#define TARGET_CPU_CPP_BUILTINS() \ + do \ + { \ + builtin_define ("NO_TRAMPOLINES"); \ + builtin_define ("PICOCHIP"); \ + builtin_define ("__PICOCHIP__"); \ + } \ + while (0) + +/* Translate requests for particular AEs into their respective ISA + options. Note that byte access is enabled by default. */ +#define TARGET_OPTION_TRANSLATE_TABLE \ + { "-mae=ANY", "-mmul-type=none -mno-byte-access" }, \ + { "-mae=ANY2", "-mmul-type=none -mno-byte-access" }, \ + { "-mae=ANY3", "-mmul-type=none" }, \ + { "-mae=STAN", "-mmul-type=none -mno-byte-access" }, \ + { "-mae=STAN2", "-mmul-type=mac -mno-byte-access" }, \ + { "-mae=STAN3", "-mmul-type=mac " }, \ + { "-mae=MAC", "-mmul-type=mac -mno-byte-access" }, \ + { "-mae=MUL", "-mmul-type=mul" }, \ + { "-mae=MEM", "-mmul-type=mul" }, \ + { "-mae=MEM2", "-mmul-type=mul" }, \ + { "-mae=CTRL", "-mmul-type=mul" }, \ + { "-mae=CTRL2", "-mmul-type=mul" } + +/* Specify the default options, so that the multilib build doesn't + need to provide special cases for the defaults. */ +#define MULTILIB_DEFAULTS \ + { "mmul-type=mul", "mbyte-access"} + +#define TARGET_HAS_BYTE_ACCESS (picochip_has_byte_access) +#define TARGET_HAS_MUL_UNIT (picochip_has_mul_unit) +#define TARGET_HAS_MAC_UNIT (picochip_has_mac_unit) +#define TARGET_HAS_MULTIPLY (picochip_has_mac_unit || picochip_has_mul_unit) + +/* Allow some options to be overriden. In particular, the 2nd + scheduling pass option is switched off, and a machine dependent + reorganisation ensures that it is run later on, after the second + jump optimisation. */ +#define OVERRIDE_OPTIONS picochip_override_options() + +#define CAN_DEBUG_WITHOUT_FP 1 + +#define TARGET_VERSION fprintf(stderr, "(picoChip)"); + +/* Storage Layout */ + +/* picoChip processors are 16-bit machines, little endian. */ + +#define BITS_BIG_ENDIAN 0 +#define BYTES_BIG_ENDIAN 0 +#define WORDS_BIG_ENDIAN 0 + +#define BITS_PER_UNIT 8 + +#define BITS_PER_WORD 16 +#define UNITS_PER_WORD (BITS_PER_WORD / BITS_PER_UNIT) + +#define POINTER_SIZE BITS_PER_WORD + +/* Promote those modes that are smaller than an int, to int mode. */ +#define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \ + ((GET_MODE_CLASS (MODE) == MODE_INT \ + && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \ + ? (MODE) = HImode : 0) + +/* All parameters are at least this aligned. Parameters are passed + one-per-register. */ +#define PARM_BOUNDARY BITS_PER_WORD + +/* The main stack pointer is guaranteed to be aligned to the most + strict data alignment. */ +#define STACK_BOUNDARY 32 + +/* Function entry point is byte aligned. */ +#define FUNCTION_BOUNDARY 8 + +/* This is the biggest alignment that can be allowed on this machine. + Since the STANs have only 256 byte memory, it doesnt make sense + to have alignments greater than 32 bytes. Hence the value */ +#define MAX_OFILE_ALIGNMENT 32*8 + +/* The strictest data object alignment, which repesents a register pair. */ +#define BIGGEST_ALIGNMENT 32 + +/* The hardware doesn't allow unaligned memory access. */ +#define STRICT_ALIGNMENT 1 + +/* We want the 'unix' style bitfield packing algorithm. */ +#define PCC_BITFIELD_TYPE_MATTERS 1 + +/* Support up to 64-bit integers. */ +#define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode) + +/* We don't support floating point, but give it a sensible definition. */ +#define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT + +/* Layout of Source Language Data Types. */ + +#define INT_TYPE_SIZE BITS_PER_WORD + +/* The normal sizes for C scalar data. */ +#define CHAR_TYPE_SIZE 8 +#define SHORT_TYPE_SIZE 16 +#define LONG_TYPE_SIZE 32 +#define LONG_LONG_TYPE_SIZE 64 + +/* We don't support the following data types, but still give them + sensible values. */ +#define FLOAT_TYPE_SIZE 32 +#define DOUBLE_TYPE_SIZE 32 +#define LONG_DOUBLE_TYPE_SIZE 32 + +/* Plain `char' is a signed type, since the hardware sign-extends + bytes when loading them from memory into a register. */ +#define DEFAULT_SIGNED_CHAR 1 + +/* Note that the names of the types used in the following macros must + be precisely the same as those defined internally in gcc. For + example, `unsigned short' wouldn't work as a type string, since gcc + doesn't define any type with this exact string. The correct string + to use is `short unsigned int'. */ + +#define SIZE_TYPE "unsigned int" + +#define PTRDIFF_TYPE "int" + +#define WCHAR_TYPE "short unsigned int" +#define WCHAR_TYPE_SIZE 16 + +#define WINT_TYPE "unsigned int" + +/* Register Usage */ + +/* Picochip has 16 16-bit registers, a condition code register and an + (inaccessible) instruction pointer. One of these registers (r15) is + special, and is either used to load a constant anywhere a register + can normally be used, or is used to specify a dummy destination + (e.g., when setting condition flags). We also define some pseudo + registers to represent condition codes, the frame pointer and the + argument pointer. The latter two are eliminated wherever possible. + + Pairs of general registers may be combined to form 32-bit registers. + + The picoChip registers are as follows: + + 0..1 - function return value + 0..5 - first 6 function parameters + 6..11 - General purpose + 12 - link register + 13 - stack pointer + 14 - specialized pointer + 15 - long constant or /dev/null + (16) acc0 + (17) pseudo condition code + (18) pseudo frame pointer + (19) pseudo arg pointer + + Registers 0..6, 12, 13, 14, 15 are caller save + Registers 0..12, 14 are available to the register allocator. + + In addition, the DSP variant of the ISA allows extra accumulator + registers to be accessed. These are special purpose registers, + which are not currently used by the compiler. + + */ + +/* Basic Characteristics of Registers */ + +/* We have 16 hard registers plus 3 pseudo hard registers and an accumulator. */ +#define FIRST_PSEUDO_REGISTER 20 + +/* The first non-hard register. Only used internally by the picoChip port. */ +#define FIRST_NONHARD_REGISTER 18 + +/* Cannot use SP, CST, CC, FP, AP */ +#define FIXED_REGISTERS {0,0,0,0,0,0,0,0, 0,0,0,0,0,1,0,1, 1,1,1,1} + +/* Those that are clobbered by a function call (includes pseudo-regs) */ +#define CALL_USED_REGISTERS {1,1,1,1,1,1,0,0, 0,0,0,0,1,1,0,1, 1,1,1,1} +#define CALL_REALLY_USED_REGISTERS {1,1,1,1,1,1,0,0, 0,0,0,0,1,1,0,0, 0,1,0,0} + +/* Define the number of the picoChip link and condition psuedo registers. */ +#define LINK_REGNUM 12 +#define CC_REGNUM 17 +#define ACC_REGNUM 16 + +/* Order of Allocation of Registers */ + +/* The registers are allocated starting with the caller-clobbered + registers, in reverse order. The registers are then listed in an + order which means that they are efficiently saved in pairs (i.e., + one 32-bit store can be used instead of two 16-bit stores to save + the registers into the stack). The exception to this is the use of + r14 (AP) register, which also appears early on. This is because the + AP register can be used to encode memory operations more + efficiently than other registers. Some code can be made more + compact as a result. */ + /* My current feeling is that r14 should go to the end and maybe even r12. + It seems like the overhead of store/load that will occur since we cant + pair anything up with r14 will be higher than the advantage of smaller + encoding. + Also r12 is put towards the end for leaf functions. Since leaf functions + do not have any calls, the prologue/epilogue for them wouldnt save up/ + restore its value. So, it doesnt make sense for us to use it in the middle, + if we can avoid it. */ +#define REG_ALLOC_ORDER {5,4,3,2,1,0,12,6,7,8,9,10,11,14,16,0,0,0,0,0} +#define LEAF_REG_ALLOC_ORDER {5,4,3,2,1,0,6,7,8,9,10,11,14,12,16,0,0,0,0,0} + +/* We can dynamically change the REG_ALLOC_ORDER using the following hook. + It would be desirable to change it for leaf functions so we can put + r12 at the end of this list.*/ +#define ORDER_REGS_FOR_LOCAL_ALLOC picochip_order_regs_for_local_alloc () + +/* How Values Fit in Registers */ + +/* Number of consecutive hard regs needed starting at reg REGNO + to hold something of mode MODE. */ +#define HARD_REGNO_NREGS(REGNO, MODE) picochip_regno_nregs((REGNO), (MODE)) + +/* Is it ok to place MODE in REGNO? Require that the register number + be aligned. */ +#define HARD_REGNO_MODE_OK(REGNO, MODE) picochip_hard_regno_mode_ok(REGNO, MODE) + +#define MODES_TIEABLE_P(MODE1,MODE2) 1 + +/* Don't copy the cc register ('cos you can't put it back). */ +#define AVOID_CCMODE_COPIES 1 + +/* Register Classes */ + +enum reg_class +{ + NO_REGS, /* no registers in set */ + FRAME_REGS, /* registers with a long offset */ + PTR_REGS, /* registers without an offset */ + CONST_REGS, /* registers for long constants */ + NULL_REGS, /* registers which ignore writes */ + CC_REGS, /* condition code registers */ + ACC_REGS, /* Accumulator registers */ + TWIN_REGS, /* registers which can be paired */ + GR_REGS, /* general purpose registers */ + ALL_REGS, /* all registers */ + LIM_REG_CLASSES, /* max value + 1 */ + + /* Some aliases */ + GENERAL_REGS = GR_REGS +}; + +#define N_REG_CLASSES (int) LIM_REG_CLASSES + +/* The following macro defines cover classes for Integrated Register + Allocator. Cover classes is a set of non-intersected register + classes covering all hard registers used for register allocation + purpose. Any move between two registers of a cover class should be + cheaper than load or store of the registers. The macro value is + array of register classes with LIM_REG_CLASSES used as the end + marker. */ + +#define IRA_COVER_CLASSES \ +{ \ + GR_REGS, LIM_REG_CLASSES \ +} + + +/* The names of the register classes */ +#define REG_CLASS_NAMES \ +{ \ + "NO_REGS", \ + "FRAME_REGS", \ + "PTR_REGS", \ + "CONST_REGS", \ + "NULL_REGS", \ + "CC_REGS", \ + "ACC_REGS", \ + "TWIN_REGS", \ + "GR_REGS", \ + "ALL_REGS" \ +} + +/* Each reg class is an array of 32-bit integers. Each array must be + long enough to store one bit for every pseudo register. Thus in the + following code, each array only stores one 32-bit value. */ +#define REG_CLASS_CONTENTS \ +{ \ + {0x00000000}, /* no registers */ \ + {0x00002000}, /* frame */ \ + {0x00004000}, /* pointer */ \ + {0x00008000}, /* const */ \ + {0x00008000}, /* null */ \ + {0x00020000}, /* cc */ \ + {0x00010000}, /* acc0 */ \ + {0x00000FFF}, /* twin */ \ + {0x000CFFFF}, /* general registers - includes pseudo-arg */ \ + {0x000FFFFF} /* all registers - includes pseudo-arg */ \ +} + +/* The earliest register class containing the given register. */ +extern const enum reg_class picochip_regno_reg_class[FIRST_PSEUDO_REGISTER]; +#define REGNO_REG_CLASS(REGNO) picochip_regno_reg_class[REGNO] + +/* Any register can be a base pointer. */ +#define BASE_REG_CLASS GR_REGS + +/* Any register can be an index. */ +#define INDEX_REG_CLASS GR_REGS + +#define REGNO_OK_FOR_BASE_P(REGNO) \ + (REGNO_REG_CLASS (REGNO) != CC_REGS && REGNO_REG_CLASS (REGNO) != ACC_REGS) + +#define REGNO_OK_FOR_INDEX_P(REGNO) 0 + +#define PREFERRED_RELOAD_CLASS(X, CLASS) CLASS + +#define CLASS_MAX_NREGS(CLASS, MODE) picochip_class_max_nregs(CLASS, MODE) + + +/* Stack Layout and Calling Conventions */ + +#define STACK_GROWS_DOWNWARD 1 + +/* The frame pointer points to the outgoing argument area, so the + locals are above that. */ +#define STARTING_FRAME_OFFSET 0 + +#define FIRST_PARM_OFFSET(FNDECL) 0 + +/* Specify where the return address lives before entry to the + prologue. This is required to enable DWARF debug information to be + generated. */ +#define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, LINK_REGNUM) + +#define RETURN_ADDR_RTX(count,frameaddr) picochip_return_addr_rtx(count,frameaddr) + +#define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (LINK_REGNUM) + +/* Registers that Address the Stack Frame */ + +#define STACK_POINTER_REGNUM 13 +#define FRAME_POINTER_REGNUM 18 +#define ARG_POINTER_REGNUM 19 + +/* Static chain is used to pass the local variables of the enclosing function. + The static chain is passed in memory. The first long-word location + beneath the stack pointer is used. In the presence of pretend + arguments, which are written into that location, this mechanism + complicates matters. */ + +/* Location seen by the caller. */ +#define STATIC_CHAIN \ + gen_rtx_MEM (Pmode, plus_constant (stack_pointer_rtx, -2 * UNITS_PER_WORD)) + +/* Location seen by the callee. */ +#define STATIC_CHAIN_INCOMING \ + gen_rtx_MEM (Pmode, plus_constant (arg_pointer_rtx, 0)) + +/* Eliminating Frame Pointer and Arg Pointer. The frame and argument + pointers are eliminated wherever possible, by replacing them with + offsets from the stack pointer. */ + +/* We want to get rid of the frame pointer. */ +#define FRAME_POINTER_REQUIRED 0 + +#define ELIMINABLE_REGS \ + {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ + {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}} + +#define CAN_ELIMINATE(FROM, TO) 1 + +#define INITIAL_ELIMINATION_OFFSET(FROM,TO,OFFSET) \ + OFFSET = initial_elimination_offset(FROM, TO); + +#define ACCUMULATE_OUTGOING_ARGS 1 + +#define PUSH_ARGS 0 + +/* Functions don't pop their args. */ +#define RETURN_POPS_ARGS(FNDECL, FNTYPE, STACK) 0 + +/* Passing Arguments in Registers */ + +/* Store the offset of the next argument. */ +#define CUMULATIVE_ARGS unsigned + +/* Decide how function arguments are handled. */ +#define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \ + picochip_function_arg (CUM, MODE, TYPE, NAMED) + +/* Incoming arguments are always the same as normal arguments, except + for a function which uses variadic arguments, in which case all + arguments are effectively passed on the stack. */ +#define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \ + picochip_incoming_function_arg(CUM, MODE, TYPE, NAMED) + +#define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT,N_NAMED_ARGS) \ + ((CUM) = 0) + +#define FUNCTION_ARG_ADVANCE(CUM,MODE,TYPE,NAMED) \ + (CUM) = picochip_arg_advance (CUM, MODE, TYPE, NAMED) + +/* Originally this used TYPE_ALIGN to determine the + alignment. Unfortunately, this fails in some cases, because the + type is unknown (e.g., libcall's). Instead, use GET_MODE_ALIGNMENT + since the mode is always present. */ +#define FUNCTION_ARG_BOUNDARY(MODE,TYPE) \ + picochip_get_function_arg_boundary(MODE) + +/* The first 6 registers can hold parameters. */ +#define FUNCTION_ARG_REGNO_P(REGNO) ((REGNO) < 6) + +/* How Scalar Function Values are Returned + Do we need this?? */ +#define FUNCTION_VALUE(VALTYPE,FUNC) picochip_function_value(VALTYPE, FUNC, 0) + +#define LIBCALL_VALUE(MODE) (gen_rtx_REG (MODE, 0)) + +/* Results are in register zero. If an SImode register is returned, + reg0 will suffice to mean R[0:1]. */ +#define FUNCTION_VALUE_REGNO_P(REGNO) ((REGNO) == 0) + +/* Don't automatically pass struct's in memory - use the + * RETURN_IN_MEMORY macro to determine when structs are returned in + * memory, and when in registers. */ +#define DEFAULT_PCC_STRUCT_RETURN 0 + +/* Function Entry and Exit */ + +/* The epilogue doesn't clobber anything. */ +#define EPILOGUE_USES(REGNO) 0 + +/* Generating Code for Profiling. No profiling implemented */ + +#define FUNCTION_PROFILER(FILE,LABELNO) + +/* Trampolines for Nested Functions */ + +/* No trampolines. */ +#define TRAMPOLINE_SIZE 0 +#define INITIALIZE_TRAMPOLINE(ADDR,FNADDR,CHAIN) + +/* Addressing Modes */ + +#define CONSTANT_ADDRESS_P(X) CONSTANT_P(X) + +#define MAX_REGS_PER_ADDRESS 1 + +#ifdef REG_OK_STRICT + +#define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \ + if (picochip_legitimate_address_p (MODE, X, 1)) goto LABEL; + +#else /* REG_OK_STRICT */ + +#define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \ + if (picochip_legitimate_address_p (MODE, X, 0)) goto LABEL; + +#endif /* !REG_OK_STRICT */ + +/* extern struct rtx_def *picochip_legitimize_address */ +/* PARAMS ((struct rtx_def *, struct rtx_def *, int)); */ +#define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN); + +/* Legitimize reload address tries machine dependent means of + reloading addresses. There seems to be a strange error in gcc, + which necessitates this macro. Consider: + + set (reg A) (symbol_ref) + set (reg B) (plus (reg A) (const_int)) + + A symbol_ref is a valid constant, so the symbol_ref is propagated + into the second instruction to generate the instruction: + + set (reg B) (plus (symbol_ref) (const_int)) + + This is an invalid address, and find_reloads_address correctly + determines this. However, that function doesn't generate a valid + replacement for the now invalid address, and the invalid address is + output into the assembly language. To fix the problem without + changing gcc itself, the following macro tests when such an invalid + address has been computed, and wraps it up inside a constant rtx. A + constant rtx can be correctly reloaded by the function, and hence + correct code is generated. */ + +#define LEGITIMIZE_RELOAD_ADDRESS(X,MODE,OPNUM,TYPE,IND_LEVELS,WIN) \ +if (picochip_symbol_offset(X)) { X = gen_rtx_CONST(MODE, X); } + +/* There are no mode dependent addresses. */ +#define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) do {} while (0) + +/* Nonzero if the constant rtx X is a legitimate general operand. X + satisfies CONSTANT_P. */ + +#define LEGITIMATE_CONSTANT_P(X) 1 + + +/* Condition Code Status */ + +#define CC_STATUS_MDEP unsigned +#define CC_STATUS_MDEP_INIT (cc_status.mdep = 0) + +/* Describing Relative Costs of Operations */ + +/* Bytes are no faster than words. */ +#define SLOW_BYTE_ACCESS 1 + +/* The assembler is often able to optimise function call branches, so + don't try to CSE them in the compiler. This was the thinking before. + But now, we realise that the benefits from CSE would mostly outweigh + the disadvantages. */ +#define NO_FUNCTION_CSE + + +/* Dividing the Output into Sections */ + +#define TEXT_SECTION_ASM_OP ".section .text\n" +#define DATA_SECTION_ASM_OP ".section .data\n" +#define BSS_SECTION_ASM_OP ".section .bss\n" +/* picoChip is Harvard (separate data/instruction memories), so + read-only data must go into the data section. */ +#define READONLY_DATA_SECTION_ASM_OP ".section .data\n" + +/* Defining the Output Assembler Language */ + +/* The Overall Framework of an Assembler File */ + +#define ASM_FILE_COMMENT "// " + +#define ASM_APP_ON "// High-level ASM start\n" +#define ASM_APP_OFF "// High-level ASM end\n" + +#define ASM_OUTPUT_IDENT(STREAM,STRING) fprintf(STREAM, ".ident %s\n", STRING) + +/* Output of Data */ + +#define ASM_OUTPUT_ASCII(FILE, PTR, LEN) picochip_output_ascii(FILE, PTR, LEN); + +/* Output of Uninitialized Variables */ +#define ASM_OUTPUT_ALIGNED_COMMON(FILE,NAME,SIZE,ALIGN) \ + picochip_output_aligned_common(FILE, NAME, SIZE, ALIGN) + +#define ASM_OUTPUT_ALIGNED_LOCAL(FILE,NAME,SIZE,ALIGN) \ + picochip_output_aligned_local(FILE, NAME, SIZE, ALIGN) + +/* Output and Generation of Labels */ + +#define ASM_OUTPUT_LABEL(STREAM,NAME) \ + do { picochip_output_label(STREAM, NAME); } while (0); + +#define ASM_OUTPUT_LABELREF(STREAM, NAME) \ + { picochip_output_labelref(STREAM, NAME); } + +/* Format must match that of picochip_output_label. */ +#define ASM_GENERATE_INTERNAL_LABEL(STRING,PREFIX,NUM) \ + picochip_generate_internal_label(STRING,PREFIX,(long)NUM) + +#define ASM_WEAKEN_LABEL(STREAM,NAME) picochip_weaken_label(STREAM,NAME); + +/* Store in OUTPUT a string (made with alloca) containing an + assembler-name for a local static variable named NAME. LABELNO is + an integer which is different for each call. The assembler can't + use periods to generate the name, so we use a ___ separator + instead. */ + +#define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \ +( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 15), \ + sprintf ((OUTPUT), "%s___%d", (NAME), (LABELNO))) + +/* Macros Controlling Initialization Routines */ + +/* By defining this, the main function won't try to call `__main'. */ +#define HAS_INIT_SECTION + +/* Output of Assembler Instructions */ + +#define REGISTER_NAMES \ +{"R0", "R1", "R2", "R3", \ + "R4", "R5", "R6", "R7", \ + "R8", "R9", "R10", "R11", \ + "R12", "FP", "R14", "R15", \ + "acc0", "pseudoCC", "pseudoFP", "pseudoAP"} + +#define ADDITIONAL_REGISTER_NAMES \ +{ \ + { "R0", 0}, \ + { "R1", 1}, \ + { "R2", 2}, \ + { "R3", 3}, \ + { "R4", 4}, \ + { "R5", 5}, \ + { "R6", 6}, \ + { "R7", 7}, \ + { "R8", 8}, \ + { "R9", 9}, \ + { "R10", 10}, \ + { "R11", 11}, \ + { "R12", 12}, \ + { "FP", 13}, \ + { "R14", 14}, \ + { "R15", 15}, \ + { "acc0", 16}, \ + { "sp", 12}, /* ABI stack pointer */ \ + { "ln", 13}, /* arch link register */ \ + { "ptr", 14}, /* arch constant pointer */ \ + { "rc", 15}, /* arch constant register */ \ + { "rz", 15}, /* arch zero */ \ +} + +/* Final prescan insn is called just before an instruction is + output. In our case, we use this to detect the VLIW slot to which + the instruction has been assigned, preparatory to generating the + VLIW output in ASM_OUTPUT_OPCODE. */ +#define FINAL_PRESCAN_INSN(insn, operand, nop) \ + picochip_final_prescan_insn (insn, operand,nop) + +#define ASM_OUTPUT_OPCODE(FILE,PTR) \ + { PTR = picochip_asm_output_opcode(FILE, PTR); } + +#define PRINT_OPERAND(STREAM,X,CODE) \ + picochip_print_operand(STREAM, X, CODE) + +#define PRINT_OPERAND_PUNCT_VALID_P(code) \ + (((code) == '|') || ((code) == '#') || ((code) == '>')) + +#define PRINT_OPERAND_ADDRESS(STREAM,X) \ + picochip_print_operand_address(STREAM,X) + +/* Output of Dispatch Tables */ + +/* Initialise a data memory location to an absolute code label. Used + for building switch statement jump tables. Note - the format of the + label must match that of the function picochip_output_label. */ +#define ASM_OUTPUT_ADDR_VEC_ELT(stream, value) \ + fprintf (stream, ".initWord _L%d\n", value); + +/* Assembler Commands for Alignment */ + +#define ASM_OUTPUT_SKIP(STREAM,BYTES) \ + fprintf(STREAM, ".skip %u\n", BYTES); +#define ASM_OUTPUT_ALIGN(STREAM,POWER) \ + fprintf(STREAM, ".align %u\n", 1 << POWER); + +/* The elaborator doesn't output zero bytes in the text section. */ +#define ASM_NO_SKIP_IN_TEXT 1 + +/* Controlling Debugging Information Format */ + +/* Macros Affecting All Debugging Formats */ + +#define DBX_REGISTER_NUMBER(REGNO) (REGNO) + +#define DWARF2_DEBUGGING_INFO +#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG +#define DWARF2_FRAME_INFO 1 + +/* Generate .file/.loc directives, so that the assembler generates the + line table. */ +#define DWARF2_ASM_LINE_DEBUG_INFO 1 + +/* Miscellaneous Parameters */ + +#define CASE_VECTOR_MODE HImode +#define WORD_REGISTER_OPERATIONS +#define LOAD_EXTEND_OP(MODE) ((MODE) == QImode ? SIGN_EXTEND : ZERO_EXTEND) +#define MOVE_MAX 4 +#define SHIFT_COUNT_TRUNCATED 1 +#define Pmode HImode +#define FUNCTION_MODE QImode +#define TRULY_NOOP_TRUNCATION(OUTPREC,INPREC) 1 + +#define ASM_LONG ":TODO:.word\t" + +/* Define builtins for selected special-purpose instructions. */ +enum picochip_builtins +{ + PICOCHIP_BUILTIN_SBC, + PICOCHIP_BUILTIN_PUT, + PICOCHIP_BUILTIN_GET, + PICOCHIP_BUILTIN_TESTPORT, + PICOCHIP_BUILTIN_COPYSW, + PICOCHIP_BUILTIN_ADDS, + PICOCHIP_BUILTIN_SUBS, + PICOCHIP_BUILTIN_BREV, + PICOCHIP_BUILTIN_BYTESWAP, + PICOCHIP_BUILTIN_GET_ARRAY, + PICOCHIP_BUILTIN_PUT_ARRAY, + PICOCHIP_BUILTIN_TESTPORT_ARRAY, + PICOCHIP_BUILTIN_ASRI, + PICOCHIP_BUILTIN_PROFILE, + PICOCHIP_BUILTIN_HALT +}; + +#define NO_DOT_IN_LABEL 1 + +/* The assembler does support LEB128, despite the auto-configure test + not detecting this. */ +#define HAVE_AS_LEB128 1 + +/* The End */ diff --git a/config/picochip/picochip.md b/config/picochip/picochip.md new file mode 100644 index 0000000..3fe6652 --- /dev/null +++ b/config/picochip/picochip.md @@ -0,0 +1,2699 @@ +;; GCC machine description for picochip +;; Copyright (C) 2008 Free Software Foundation, Inc. +;; Contributed by picoChip Designs Ltd (http://www.picochip.com) +;; Maintained by Daniel Towner (dant@picochip.com) and Hariharan +;; Sandanagobalane (hariharan@picochip.com) +;; +;; This file is part of GCC. +;; +;; GCC is free software; you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation; either version 3, or (at your option) +;; any later version. +;; +;; GCC is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. +;; +;; You should have received a copy of the GNU General Public License +;; along with GCC; see the file COPYING3. If not, see +;; . + +;; ------------------------------------------------------------------------- + +;; In addition to the normal output operand formats, the following +;; letter formats are also available: +;; +;; The following can be used for constants, or the constant part of a +;; memory offset. +;; Q - Output constant unaltered (byte mode). +;; M - Alias for Q, which only works with memory operands. +;; H - Divide constant by 2 (i.e., HImode is 2 bytes) +;; S - Divide constant by 4 (i.e., SImode is 4 bytes) +;; +;; The following can be used for two part addresses (i.e., base + +;; offset or base[offset]). +;; o - Output offset only. +;; b - Output base only. +;; +;; The following are used on SI registers and constants +;; R - Output register pair (i.e., R[n:m]) +;; L - Output lower word/register +;; U - Output upper word/register +;; +;; The following are used on DI mode registers. +;; X - Output 3rd register +;; Y - Output 4th register +;; +;; Miscellaneous +;; | - Output VLIW separator +;; r - Output register value of memory operand. +;; I - Output an opcode (e.g., ADD for plus, LSL for lshift) +;; i - Output an opcode in symbolic notation (e.g., + for plus) + +;; Define the length of an instruction. Used to allow different types +;; of branches to be used for different branch offsets. Default to 6 +;; bytes, which is the longest possible single instruction. +(define_attr "length" "" (const_int 6)) + +;; Define some constants which are used in conjuction with branch +;; scheduling. Branches must be 10-bit signed, which equates to +;; [-512,511]. However, to compensate for the lack of branch alignment +;; these offsets are reduced by a factor of 2. + +(define_constants + [ + (MIN_BRANCH_OFFSET -256) + (MAX_BRANCH_OFFSET 255) + (SHORT_BRANCH_LENGTH 6) ; The size of a schedulable short branch. + (LONG_BRANCH_LENGTH 16) ; The size of an expanded JMP?? macro. + ] +) + +;; Define identifiers for various special instructions. These +;; instructions may then be used in RTL expansions, or builtins. +(define_constants + [ + ; Special instruction builtins. + (UNSPEC_SBC 0) ; Sign-bit count + (UNSPEC_ADDS 1) ; Saturating addition + (UNSPEC_SUBS 2) ; Saturating subtraction + (UNSPEC_BREV 3) ; Bit reversal + + ; Special internal instructions (only used by compiler) + (UNSPEC_COPYSW 5) ; Get status word + (UNSPEC_ADDC 6) ; Add with carry. + + ; Scalar port communication builtins + (UNSPEC_PUT 7) ; Communication (put): port[op0] := op1 + (UNSPEC_GET 8) ; Communication (get): op0 := get_port[op1] + (UNSPEC_TESTPORT 9) ; Communication (test): op0 := testport[op1] + + ; Array port communication builtins. These all take extra + ; arguments giving information about the array access being used. + (UNSPEC_PUT_ARRAY 10) ; Array put + (UNSPEC_GET_ARRAY 11) ; Array get + (UNSPEC_TESTPORT_ARRAY 12) ; Array test port + + ;; Array port expansions + (UNSPEC_CALL_GET_ARRAY 13) ; + (UNSPEC_CALL_PUT_ARRAY 14) ; + (UNSPEC_CALL_TESTPORT_ARRAY 15) ; + + ; Array port low-level fn calls + (UNSPEC_CALL_GET_FN 16) + (UNSPEC_CALL_TESTPORT_FN 17) + + ; Halt instruction. + (UNSPEC_HALT 18) + + ; Internal TSTPORT instruction, used to generate a single TSTPORT + ; instruction for use in the testport branch split. + (UNSPEC_INTERNAL_TESTPORT 19) + + ; instruction for use in the profile based optimizations. + (UNSPEC_INTERNAL_PROFILE 20) + ] +) + +;; Register ID's +(define_constants + [ + (LINK_REGNUM 12) ; Function link register. + (CC_REGNUM 17) ; Condition flags. + (ACC_REGNUM 16) ; Condition flags. + ] +) + +;;============================================================================ +;; Predicates and constraints +;;============================================================================ + +(include "predicates.md") +(include "constraints.md") + +;;============================================================================ +;; First operand shifting patterns. These allow certain instructions +;; (e.g., add, and, or, xor, sub) to apply a shift-by-constant to +;; their first operand. +;; +;; Note that only the first operand is matched by the shift, to ensure +;; that non-commutative instructions (like subtract) work +;; properly. When a commutative instruction, with a shift in the +;; second operand is found, the compiler will reorder the operands to +;; match. +;;============================================================================ + +(define_insn "*firstOpGenericAshift" + [(set (match_operand:HI 0 "register_operand" "=r") + (match_operator:HI 1 "picochip_first_op_shift_operator" + [(ashift:HI + (match_operand:HI 2 "register_operand" "r") + (match_operand:HI 3 "picochip_J_operand" "J")) + (match_operand:HI 4 "picochip_register_or_immediate_operand" "ri")])) + (clobber (reg:CC CC_REGNUM))] + "" + "%I1.0 [LSL %2,%3],%4,%0\t// %0 := (%2 << %3) %i1 %4" + [(set_attr "type" "picoAlu") + ;; A long constant must be used if the operator instruction doesn't + ;; accept immediates, or if the constant is too big to fit the + ;; immediate. Note that the following condition is written in the + ;; way which uses the least number of predicates. + (set (attr "longConstant") + (cond [(ior (match_operand 4 "register_operand") + (and (match_operand 1 "picochip_first_op_shift_operator_imm") + (match_operand 1 "picochip_J_operand"))) + (const_string "false")] + (const_string "true")))]) + +;; During combine, ashift gets converted into a multiply, necessitating the following pattern. +;; Note that we do a log_2(imm) to get the actual LSL operand. + +(define_insn "*firstOpGenericAshift" + [(set (match_operand:HI 0 "register_operand" "=r") + (match_operator:HI 1 "picochip_first_op_shift_operator" + [(mult:HI + (match_operand:HI 2 "register_operand" "r") + (match_operand:HI 3 "power_of_2_imm_operand" "n")) + (match_operand:HI 4 "picochip_register_or_immediate_operand" "ri")])) + (clobber (reg:CC CC_REGNUM))] + "" + "%I1.0 [LSL %2,%P3],%4,%0\t// %0 := (%2 << %3) %i1 %4" + [(set_attr "type" "picoAlu") + ;; A long constant must be used if the operator instruction doesn't + ;; accept immediates, or if the constant is too big to fit the + ;; immediate. Note that the following condition is written in the + ;; way which uses the least number of predicates. + (set (attr "longConstant") + (cond [(ior (match_operand 4 "register_operand") + (and (match_operand 1 "picochip_first_op_shift_operator_imm") + (match_operand 1 "picochip_J_operand"))) + (const_string "false")] + (const_string "true")))]) + +(define_insn "*firstOpGenericAshiftrt" + [(set (match_operand:HI 0 "register_operand" "=r") + (match_operator:HI 1 "picochip_first_op_shift_operator" + [(ashiftrt:HI + (match_operand:HI 2 "register_operand" "r") + (match_operand:HI 3 "picochip_J_operand" "J")) + (match_operand:HI 4 "picochip_register_or_immediate_operand" "ri")])) + (clobber (reg:CC CC_REGNUM))] + "" + "%I1.0 [ASR %2,%3],%4,%0\t// %0 := (%2 >>{arith} %3) %i1 %4" + [(set_attr "type" "picoAlu") + ;; A long constant must be used if the operator instruction doesn't + ;; accept immediates, or if the constant is too big to fit the + ;; immediate. Note that the following condition is written in the + ;; way which uses the least number of predicates. + (set (attr "longConstant") + (cond [(ior (match_operand 4 "register_operand") + (and (match_operand 1 "picochip_first_op_shift_operator_imm") + (match_operand 1 "picochip_J_operand"))) + (const_string "false")] + (const_string "true")))]) + +(define_insn "*firstOpGenericLshiftrt" + [(set (match_operand:HI 0 "register_operand" "=r") + (match_operator:HI 1 "picochip_first_op_shift_operator" + [(lshiftrt:HI + (match_operand:HI 2 "register_operand" "r") + (match_operand:HI 3 "picochip_J_operand" "J")) + (match_operand:HI 4 "picochip_register_or_immediate_operand" "ri")])) + (clobber (reg:CC CC_REGNUM))] + "" + "%I1.0 [LSR %2,%3],%4,%0\t// %0 := (%2 >> %3) %i1 %4" + [(set_attr "type" "picoAlu") + ;; A long constant must be used if the operator instruction doesn't + ;; accept immediates, or if the constant is too big to fit the + ;; immediate. Note that the following condition is written in the + ;; way which uses the least number of predicates. + (set (attr "longConstant") + (cond [(ior (match_operand 4 "register_operand") + (and (match_operand 1 "picochip_first_op_shift_operator_imm") + (match_operand 1 "picochip_J_operand"))) + (const_string "false")] + (const_string "true")))]) + +;;=========================================================================== +;; Jump instructions. +;;=========================================================================== + +(define_insn "indirect_jump" + [(set (pc) (match_operand:HI 0 "register_operand" "r"))] + "" + "JR (%0)\t// Indirect_jump to %0 %>" + [(set_attr "type" "realBranch") + (set_attr "length" "3")]) + +(define_insn "jump" + [(set (pc) + (label_ref (match_operand 0 "" "")))] + "" + "* return picochip_output_jump(insn);" + [(set (attr "length") + (if_then_else + (and (ge (minus (match_dup 0) (pc)) (const_int MIN_BRANCH_OFFSET)) + (le (minus (match_dup 0) (pc)) (const_int MAX_BRANCH_OFFSET))) + (const_int SHORT_BRANCH_LENGTH) + (const_int LONG_BRANCH_LENGTH))) + (set (attr "type") + (if_then_else + (eq_attr "length" "6") + (const_string "realBranch") + (const_string "unknown")))]) + +(define_insn "*fn_return" + [(return) + (use (reg:HI LINK_REGNUM))] + "" + "JR (R12)\t// Return to caller %>" + [(set_attr "length" "2") + (set_attr "type" "realBranch") + (set_attr "longConstant" "false")]) + +;; Peephole either 2 LDWs or STWs into LDL/STL. +(define_peephole2 + [(set (match_operand:HI 0 "register_operand" "") + (match_operand:HI 1 "memory_operand" "")) + (set (match_operand:HI 2 "register_operand" "") + (match_operand:HI 3 "memory_operand" ""))] + "ok_to_peephole_ldw(operands[0],operands[1],operands[2],operands[3])" + [(set (match_dup 4) (match_dup 5))] + "{ + operands[4] = gen_min_reg(operands[0],operands[2]); + operands[5] = gen_SImode_mem(operands[1],operands[3]); + }") + +(define_peephole2 + [(set (match_operand:HI 0 "memory_operand" "") + (match_operand:HI 1 "register_operand" "")) + (set (match_operand:HI 2 "memory_operand" "") + (match_operand:HI 3 "register_operand" ""))] + "ok_to_peephole_stw(operands[0],operands[1],operands[2],operands[3])" + [(set (match_dup 4) (match_dup 5))] + "{ + operands[4] = gen_SImode_mem(operands[0],operands[2]); + operands[5] = gen_min_reg(operands[1],operands[3]); + }") + + +;; We have instructions like add,subtract,ior,and that set condition +;; codes if they are executed on slot 0. If we have +;; add a = b + c +;; if (a!=0) +;; {} +;; We would have RTL sequence like +;; add.# rb,rc,ra # will be replaced by slot no, after scheduling +;; sub.0 ra,0,r15 +;; bnz +;; Instead, we can just do +;; add.0 rb,rc,ra +;; bnz + +(define_peephole2 + [(parallel [(set (match_operand:HI 0 "register_operand" "") + (plus:HI (match_operand:HI 1 "register_operand" "") + (match_operand:HI 2 "general_operand" ""))) + (clobber (reg:CC CC_REGNUM))]) + (parallel [(set (pc) + (if_then_else + (match_operator:CC 3 "picochip_peephole_comparison_operator" + [(match_dup 0) (const_int 0)]) + (label_ref (match_operand 6 "" "")) + (pc))) + (clobber (reg:CC CC_REGNUM))])] + "" + [(parallel [(set (match_dup 0) + (plus:HI (match_dup 1) (match_dup 2))) + (set (reg:CC CC_REGNUM) + (match_op_dup 3 [(const_int 0) (const_int 0)]))]) + (parallel [(set (pc) + (if_then_else + (match_op_dup:HI 3 [(reg:CC CC_REGNUM) (const_int 0)]) + (label_ref (match_dup 6)) + (pc))) + (use (match_dup 7))])] + "{ + operands[7] = GEN_INT(0); + }") + +(define_peephole2 + [(parallel [(set (match_operand:HI 0 "register_operand" "") + (plus:HI (match_operand:HI 1 "register_operand" "") + (match_operand:HI 2 "general_operand" ""))) + (clobber (reg:CC CC_REGNUM))]) + (set (reg:CC CC_REGNUM) + (match_operator:CC 3 "picochip_peephole_comparison_operator" + [(match_dup 0) (const_int 0)])) + (parallel [(set (pc) + (if_then_else + (match_operator 4 "comparison_operator" + [(reg:CC CC_REGNUM) (const_int 0)]) + (label_ref (match_operand 5 "" "")) + (pc))) + (use (match_operand:HI 6 "const_int_operand" ""))])] + "" + [(parallel [(set (match_dup 0) + (plus:HI (match_dup 1) (match_dup 2))) + (set (reg:CC CC_REGNUM) + (match_op_dup 3 [(const_int 0) (const_int 0)]))]) + (parallel [(set (pc) + (if_then_else (match_op_dup:HI 4 [(reg:CC CC_REGNUM) (const_int 0)]) + (label_ref (match_dup 5)) + (pc))) + (use (match_dup 6))])] + "{ + operands[7] = GEN_INT(0); + }") + + +;; If peephole happens before the cbranch split + +(define_peephole2 + [(parallel [(set (match_operand:HI 0 "register_operand" "") + (minus:HI (match_operand:HI 1 "general_operand" "") + (match_operand:HI 2 "register_operand" ""))) + (clobber (reg:CC CC_REGNUM))]) + (parallel [(set (pc) + (if_then_else + (match_operator:CC 3 "picochip_peephole_comparison_operator" + [(match_dup 0) (const_int 0)]) + (label_ref (match_operand 6 "" "")) + (pc))) + (clobber (reg:CC CC_REGNUM))])] + "" + [(parallel [(set (match_dup 0) + (minus:HI (match_dup 1) (match_dup 2))) + (set (reg:CC CC_REGNUM) + (match_op_dup 3 [(const_int 0) (const_int 0)]))]) + (parallel [(set (pc) + (if_then_else + (match_op_dup:HI 3 [(reg:CC CC_REGNUM) (const_int 0)]) + (label_ref (match_dup 6)) + (pc))) + (use (match_dup 7))])] + "{ + operands[7] = GEN_INT(0); + }") + + +;; If peephole happens after the cbranch split + +(define_peephole2 + [(parallel [(set (match_operand:HI 0 "register_operand" "") + (minus:HI (match_operand:HI 1 "general_operand" "") + (match_operand:HI 2 "register_operand" ""))) + (clobber (reg:CC CC_REGNUM))]) + (set (reg:CC CC_REGNUM) + (match_operator:CC 3 "picochip_peephole_comparison_operator" + [(match_dup 0) (const_int 0)])) + (parallel [(set (pc) + (if_then_else + (match_operator 4 "comparison_operator" + [(reg:CC CC_REGNUM) (const_int 0)]) + (label_ref (match_operand 5 "" "")) + (pc))) + (use (match_operand:HI 6 "const_int_operand" ""))])] + "" + [(parallel [(set (match_dup 0) + (minus:HI (match_dup 1) (match_dup 2))) + (set (reg:CC CC_REGNUM) + (match_op_dup 3 [(const_int 0) (const_int 0)]))]) + (parallel [(set (pc) + (if_then_else (match_op_dup:HI 4 [(reg:CC CC_REGNUM) (const_int 0)]) + (label_ref (match_dup 5)) + (pc))) + (use (match_dup 6))])] + "{ + operands[7] = GEN_INT(0); + }") + +;; If peephole happens before the cbranch split + +(define_peephole2 + [(parallel[(set (match_operand:HI 0 "register_operand" "") + (and:HI (match_operand:HI 1 "register_operand" "") + (match_operand:HI 2 "general_operand" ""))) + (clobber (reg:CC CC_REGNUM))]) + (parallel [(set (pc) + (if_then_else + (match_operator:CC 3 "picochip_peephole_comparison_operator" + [(match_dup 0) (const_int 0)]) + (label_ref (match_operand 6 "" "")) + (pc))) + (clobber (reg:CC CC_REGNUM))])] + "" + [(parallel [(set (match_dup 0) + (and:HI (match_dup 1) (match_dup 2))) + (set (reg:CC CC_REGNUM) + (match_op_dup 3 [(const_int 0) (const_int 0)]))]) + (parallel [(set (pc) + (if_then_else + (match_op_dup:HI 3 [(reg:CC CC_REGNUM) (const_int 0)]) + (label_ref (match_dup 6)) + (pc))) + (use (match_dup 7))])] + "{ + operands[7] = GEN_INT(0); + }") + +(define_peephole2 + [(parallel[(set (match_operand:HI 0 "register_operand" "") + (and:HI (match_operand:HI 1 "register_operand" "") + (match_operand:HI 2 "general_operand" ""))) + (clobber (reg:CC CC_REGNUM))]) + (set (reg:CC CC_REGNUM) + (match_operator:CC 3 "picochip_peephole_comparison_operator" + [(match_dup 0) (const_int 0)])) + (parallel [(set (pc) + (if_then_else + (match_operator 4 "comparison_operator" + [(reg:CC CC_REGNUM) (const_int 0)]) + (label_ref (match_operand 5 "" "")) + (pc))) + (use (match_operand:HI 6 "const_int_operand" ""))])] + "" + [(parallel [(set (match_dup 0) + (and:HI (match_dup 1) (match_dup 2))) + (set (reg:CC CC_REGNUM) + (match_op_dup 3 [(const_int 0) (const_int 0)]))]) + (parallel [(set (pc) + (if_then_else (match_op_dup:HI 4 [(reg:CC CC_REGNUM) (const_int 0)]) + (label_ref (match_dup 5)) + (pc))) + (use (match_dup 6))])] + "{ + operands[7] = GEN_INT(0); + }") + +;; If peephole happens before the cbranch split + +(define_peephole2 + [(parallel[(set (match_operand:HI 0 "register_operand" "") + (ior:HI (match_operand:HI 1 "register_operand" "") + (match_operand:HI 2 "general_operand" ""))) + (clobber (reg:CC CC_REGNUM))]) + (parallel [(set (pc) + (if_then_else + (match_operator:CC 3 "picochip_peephole_comparison_operator" + [(match_dup 0) (const_int 0)]) + (label_ref (match_operand 6 "" "")) + (pc))) + (clobber (reg:CC CC_REGNUM))])] + "" + [(parallel [(set (match_dup 0) + (ior:HI (match_dup 1) (match_dup 2))) + (set (reg:CC CC_REGNUM) + (match_op_dup 3 [(const_int 0) (const_int 0)]))]) + (parallel [(set (pc) + (if_then_else + (match_op_dup:HI 3 [(reg:CC CC_REGNUM) (const_int 0)]) + (label_ref (match_dup 6)) + (pc))) + (use (match_dup 7))])] + "{ + operands[7] = GEN_INT(0); + }") + +(define_peephole2 + [(parallel[(set (match_operand:HI 0 "register_operand" "") + (ior:HI (match_operand:HI 1 "register_operand" "") + (match_operand:HI 2 "general_operand" ""))) + (clobber (reg:CC CC_REGNUM))]) + (set (reg:CC CC_REGNUM) + (match_operator:CC 3 "picochip_peephole_comparison_operator" + [(match_dup 0) (const_int 0)])) + (parallel [(set (pc) + (if_then_else + (match_operator 4 "comparison_operator" + [(reg:CC CC_REGNUM) (const_int 0)]) + (label_ref (match_operand 5 "" "")) + (pc))) + (use (match_operand:HI 6 "const_int_operand" ""))])] + "" + [(parallel [(set (match_dup 0) + (ior:HI (match_dup 1) (match_dup 2))) + (set (reg:CC CC_REGNUM) + (match_op_dup 3 [(const_int 0) (const_int 0)]))]) + (parallel [(set (pc) + (if_then_else (match_op_dup:HI 4 [(reg:CC CC_REGNUM) (const_int 0)]) + (label_ref (match_dup 5)) + (pc))) + (use (match_dup 6))])] + "{ + operands[7] = GEN_INT(0); + }") + +;; Conditional branch (HI). This is split into separate compare and +;; branch instructions if scheduling is enabled. The branch +;; instruction is supplied with the type of comparison on which the +;; branch should occur. + +(define_insn_and_split "cbranchhi4" + [(set (pc) + (if_then_else + (match_operator:CC 0 "comparison_operator" + [(match_operand:HI 1 "register_operand" "r") + (match_operand:HI 2 "picochip_comparison_operand" "ri")]) + (label_ref (match_operand 3 "" "")) + (pc))) + (clobber (reg:CC CC_REGNUM))] + "" + "* return picochip_output_cbranch(operands);" + "reload_completed + && (picochip_schedule_type != DFA_TYPE_NONE || flag_delayed_branch)" + [(set (reg:CC CC_REGNUM) (match_dup 0)) + (parallel [(set (pc) + (if_then_else (match_op_dup:HI 0 [(reg:CC CC_REGNUM) (const_int 0)]) + (label_ref (match_dup 3)) + (pc))) + (use (match_dup 4))])] + "{ + operands[4] = GEN_INT(GET_CODE(operands[0])); + }") + +;; The only difference between this and the next pattern is that the next pattern +;; might introduce subtracts whose first operand is a constant. This would have to +;; be a longConstant. But, we know that such a situation wouldnt arise for supported +;; comparison operator and hence this pattern assumes that the second constraint combo +;; would still generate a normal instruction. + +(define_insn "*supported_compare" + [(set (reg:CC CC_REGNUM) + (match_operator:CC 0 "picochip_supported_comparison_operator" + [(match_operand:HI 1 "register_operand" "r,r,r") + (match_operand:HI 2 "picochip_comparison_operand" "r,J,i")]))] + "" + "* return picochip_output_compare(operands);" + [; Must be picoAlu because it sets the condition flags. + (set_attr "type" "picoAlu,picoAlu,picoAlu") + (set_attr "longConstant" "false,false,true") + (set_attr "length" "2,2,4") + ]) + +(define_insn "*compare" + [(set (reg:CC CC_REGNUM) + (match_operator:CC 0 "comparison_operator" + [(match_operand:HI 1 "register_operand" "r,r,r") + (match_operand:HI 2 "picochip_comparison_operand" "r,M,i")]))] + "" + "* return picochip_output_compare(operands);" + [; Must be picoAlu because it sets the condition flags. + (set_attr "type" "picoAlu,picoAlu,picoAlu") + (set_attr "longConstant" "false,true,true") + (set_attr "length" "2,4,4") + ]) + +; Match a branch instruction, created from a tstport/cbranch split. +; We use a "use" clause so GCC doesnt try to use this pattern generally. +(define_insn "*branch" + [(set (pc) + (if_then_else + (match_operator 2 "comparison_operator" + [(reg:CC CC_REGNUM) (const_int 0)]) + (label_ref (match_operand 0 "" "")) + (pc))) + (use (match_operand:HI 1 "const_int_operand" ""))] + "" + "* return picochip_output_branch(operands, insn);" + [(set (attr "length") + (if_then_else + (and (ge (minus (match_dup 0) (pc)) (const_int MIN_BRANCH_OFFSET)) + (le (minus (match_dup 0) (pc)) (const_int MAX_BRANCH_OFFSET))) + (const_int SHORT_BRANCH_LENGTH) + (const_int LONG_BRANCH_LENGTH))) + (set (attr "type") + (if_then_else + (eq_attr "length" "6") + (const_string "realBranch") + (const_string "unknown")))]) + +;; If a movqi is used which accesses memory on a machine which doesn't +;; have byte addressing, synthesise the instruction using word load/store +;; operations. The movqi's that are required during reload phase are +;; handled using reload_inqi/reload_outqi. + +(define_expand "movqi" + [(set (match_operand:QI 0 "nonimmediate_operand" "") + (match_operand:QI 1 "general_operand" ""))] + "" +{ + + if (!reload_completed && + !TARGET_HAS_BYTE_ACCESS && + (MEM == GET_CODE(operands[0]) || MEM == GET_CODE(operands[1]))) + { + rtx address; + rtx wordAddress; + rtx const1; + rtx shiftVal; + rtx loadedValue; + rtx addressMask; + + warn_of_byte_access(); + + /* Load the constant 1 into a register. */ + const1 = gen_reg_rtx(HImode); + emit_insn(gen_rtx_SET(HImode, const1, GEN_INT(1))); + + /* Load the address mask with the bitwise complement of 1. */ + addressMask = gen_reg_rtx(HImode); + emit_insn(gen_rtx_SET(HImode, addressMask, GEN_INT(-2))); + + /* Handle loads first, in case we are dealing with a mem := mem + * instruction. */ + if (MEM == GET_CODE(operands[1])) + { + /* Loads work as follows. The entire word containing the desired byte + * is loaded. The bottom bit of the address indicates which + * byte is required. The desired byte is moved into the most + * significant byte, and then an arithmetic shift right + * invoked to achieve sign extension. The desired byte is + * moved to the MSB by XOR'ing the bottom address bit by 1, + * multiplying the result by 8, and then shifting left by + * that amount. Note that shifts only operate on the bottom + * 4-bits of the source offset, so although the XOR may + * produce a value which has its upper bits set, only bit 4 + * (i.e., the inverted, shifted bottom address bit) actually + * gets used. + */ + + /* Ensure the address is in a register. */ + address = gen_reg_rtx(HImode); + emit_insn(gen_rtx_SET(HImode, address, XEXP(operands[1], 0))); + + /* Compute the word address by masking out the bottom bit. */ + wordAddress = gen_reg_rtx(HImode); + emit_insn(gen_andhi3(wordAddress, address, addressMask)); + + /* Compute the shift value. This is the bottom address bit, + * inverted, and multiplied by 8. */ + shiftVal = gen_reg_rtx(HImode); + emit_insn(gen_xorhi3(shiftVal, address, const1)); + emit_insn(gen_ashlhi3(shiftVal, shiftVal, GEN_INT(3))); + + /* Emit the memory load. */ + loadedValue = gen_reg_rtx(HImode); + emit_insn(gen_rtx_SET(HImode, loadedValue, gen_rtx_MEM(HImode, wordAddress))); + + /* Shift the desired byte to the most significant byte. */ + rtx topByteValue = gen_reg_rtx (HImode); + emit_insn (gen_ashlhi3 (topByteValue, loadedValue, shiftVal)); + + /* Sign extend the top-byte back into the bottom byte. */ + rtx signExtendedValue = gen_reg_rtx(HImode); + emit_insn(gen_ashrhi3(signExtendedValue, topByteValue, GEN_INT(8))); + + /* Final extraction of QI mode register. */ + operands[1] = gen_rtx_SUBREG(QImode, signExtendedValue, 0); + + } + + if (MEM == GET_CODE(operands[0]) && GET_CODE(operands[1]) != MEM) + { + rtx zeroingByteMask; + rtx temp; + rtx tempQiMode; + rtx tempHiMode; + + /* Get the address. */ + address = gen_reg_rtx(HImode); + emit_insn(gen_rtx_SET(HImode, address, XEXP(operands[0], 0))); + + /* Compute the word aligned address. */ + wordAddress = gen_reg_rtx(HImode); + emit_insn(gen_andhi3(wordAddress, address, addressMask)); + + /* Compute the shift value. */ + shiftVal = gen_reg_rtx(HImode); + emit_insn(gen_andhi3(shiftVal, address, const1)); + emit_insn(gen_ashlhi3(shiftVal, shiftVal, GEN_INT(3))); + + /* Emit the memory load. */ + loadedValue = gen_reg_rtx(HImode); + emit_insn(gen_rtx_SET(HImode, loadedValue, gen_rtx_MEM(HImode, wordAddress))); + + /* Zero out the destination bits by AND'ing with 0xFF00 + * shifted appropriately. */ + zeroingByteMask = gen_reg_rtx(HImode); + emit_insn(gen_rtx_SET(HImode, zeroingByteMask, GEN_INT(-256))); + emit_insn(gen_lshrhi3(zeroingByteMask, zeroingByteMask, shiftVal)); + emit_insn(gen_andhi3(loadedValue, loadedValue, zeroingByteMask)); + + /* Grab the incoming QI register, and ensure that the top bits + * are zeroed out. This is because the register may be + * storing a signed value, in which case the top-bits will be + * sign bits. These must be removed to ensure that the + * read-modify-write (which uses an OR) doesn't pick up those + * bits, instead of the original memory value which is being + * modified. + */ + /*if (register_operand(operands[1],QImode)) + { + tempHiMode = XEXP(operands[1], 0); + } + else + { + tempHiMode = operands[1]; + }*/ + //tempHiMode = force_reg(QImode, operands[1]); + tempHiMode = simplify_gen_subreg(HImode, operands[1], QImode, 0); + temp = gen_reg_rtx(HImode); + emit_insn(gen_rtx_SET(HImode, temp, tempHiMode)); + rtx lsbByteMask = gen_reg_rtx (HImode); + emit_insn (gen_rtx_SET (HImode, lsbByteMask, GEN_INT (0xFF))); + emit_insn (gen_andhi3 (temp, temp, lsbByteMask)); + + /* Shift the incoming byte value by the appropriate amount, + * and OR into the load value. */ + emit_insn(gen_ashlhi3(temp, temp, shiftVal)); + emit_insn(gen_iorhi3(loadedValue, loadedValue, temp)); + + /* Rewrite the original assignment, to assign the new value + * to the word address. */ + operands[0] = gen_rtx_MEM(HImode, wordAddress); + operands[1] = loadedValue; + + } + + } +}) + +(define_insn "*movqi_sign_extend" + [(set (match_operand:HI 0 "register_operand" "=r,r") + (sign_extend:HI (match_operand:QI 1 "memory_operand" "a,m")))] + "TARGET_HAS_BYTE_ACCESS" + "@ + LDB (%a1),%0\t\t// %0 = Mem(%a1) + LDB %a1,%0\t\t// %0 = Mem(%M1{byte})" + [(set_attr "type" "mem,mem") + (set_attr "longConstant" "true,false") + (set_attr "length" "4,4")]) + +;; movqi instructions for machines with and without byte access. +(define_insn "*movqi_byte" + [(set (match_operand:QI 0 "nonimmediate_operand" "=r,r,r,r,r,a,m") + (match_operand:QI 1 "general_operand" "r,a,m,I,i,r,r"))] + "TARGET_HAS_BYTE_ACCESS" + "@ + COPY.%# %1, %0\t// %0 := %1 + LDB (%a1),%0\t\t// %0 = Mem(%a1) + LDB %a1,%0\t\t// %0 = Mem(%M1{byte}) + COPY.%# %1,%0\t\t// %0 := #%1 (QI) (short constant) + COPY.%# %1,%0\t\t// %0 := #%1 (QI) (long constant) + STB %1,(%a0)\t\t// Mem(%a0) := %1 + STB %1,%a0\t\t// Mem(%M0{byte}) := %1" + [(set_attr "type" "basicAlu,mem,mem,basicAlu,basicAlu,mem,mem") + (set_attr "longConstant" "false,true,false,false,true,true,false") + (set_attr "length" "2,4,4,2,4,4,4")]) + +;; Machines which don't have byte access can copy registers, and load +;; constants, but can't access memory. The define_expand for movqi +;; should already have rewritten memory accesses using word +;; operations. The exception is qi reloads, which are handled using +;; the reload_? patterns. +(define_insn "*movqi_nobyte" + [(set (match_operand:QI 0 "register_operand" "=r,r") + (match_operand:QI 1 "picochip_register_or_immediate_operand" "r,i"))] + "!TARGET_HAS_BYTE_ACCESS" + "@ + COPY.%# %1,%0\t// %0 := %1 + COPY.%# %1,%0\t\t// %0 := #%1 (QI)") + +(define_insn "movhi" + [(set (match_operand:HI 0 "nonimmediate_operand" "=r,r,r,a,m,r,r") + (match_operand:HI 1 "general_operand" "r,a,m,r,r,I,i"))] + "" + "@ + COPY.%# %1,%0\t\t// %0 := %1 + LDW (%a1),%0\t\t// %0 := Mem(%a1) + LDW %a1,%0\t\t// %0 = Mem(%M1{byte}) + STW %1,(%a0)\t\t// Mem(%a0) := %1 + STW %1,%a0\t\t// Mem(%M0{byte}) := %1 + COPY.%# %1,%0\t// %0 := %1 (short constant) + COPY.%# %1,%0\t// %0 := %1 (long constant)" + [(set_attr "type" "basicAlu,mem,mem,mem,mem,basicAlu,basicAlu") + (set_attr "longConstant" "false,true,false,true,false,false,true") + (set_attr "length" "2,4,4,4,4,2,4")]) + +(define_insn "movsi" + [(set (match_operand:SI 0 "nonimmediate_operand" "=r,r,r,r,a,m") + (match_operand:SI 1 "general_operand" "r,a,m,i,r,r"))] + "" + "@ + // %R0 := %R1 (SI)\n\tCOPY.%# %L1,%L0 %| COPY.1 %U1,%U0 + LDL (%a1),%R0\t\t// %R0 = Mem(%a1) + LDL %a1,%R0\t\t// %R0 = Mem(%M1{byte}) + // %R0 := #%1 (SI)\n\tCOPY.%# %L1,%L0 %| COPY.%# %U1,%U0 + STL %R1,(%a0)\t\t// Mem(%a0) := %R1 + STL %R1,%a0\t\t// Mem(%M0{byte}) := %R1" + [(set_attr "type" "unknown,mem,mem,unknown,mem,mem") + (set_attr "longConstant" "false,true,false,true,false,false") + (set_attr "length" "4,4,4,6,4,4")]) + +; Split an SI mode register copy into separate HI mode copies, which +; can be VLIW'd with other instructions. Only split the instruction +; when VLIW scheduling is enabled. Splitting the instruction saves +; some code space. +; +; This is predicated in reload_completed. This ensures that the +; instructions aren't broken up too early which can result in the +; SImode code being converted into inefficient HI mode code. + +(define_split + [(set (match_operand:SI 0 "register_operand" "") + (match_operand:SI 1 "register_operand" ""))] + "reload_completed && picochip_schedule_type == DFA_TYPE_SPEED" + [(set (match_dup 2) (match_dup 3)) + (set (match_dup 4) (match_dup 5))] + "{ + operands[2] = gen_lowpart (HImode, operands[0]); + operands[3] = gen_lowpart (HImode, operands[1]); + operands[4] = gen_highpart (HImode, operands[0]); + operands[5] = gen_highpart (HImode, operands[1]); + }") + +; SI Mode split for load constant. +(define_split + [(set (match_operand:SI 0 "register_operand" "") + (match_operand:SI 1 "const_int_operand" ""))] + "" + [(set (match_dup 2) (match_dup 3)) + (set (match_dup 4) (match_dup 5))] + "{ + operands[2] = gen_lowpart (HImode, operands[0]); + operands[3] = picochip_get_low_const(operands[1]); + operands[4] = gen_highpart (HImode, operands[0]); + operands[5] = picochip_get_high_const(operands[1]); + }") + +(define_insn "movsf" + [(set (match_operand:SF 0 "nonimmediate_operand" "=r,r,r,m") + (match_operand:SF 1 "general_operand" "r,m,i,r"))] + "" + "@ + // %R0 := %R1 (SF)\n\tCOPY.%# %L1,%L0 %| COPY.1 %U1,%U0 + LDL %a1,%R0\t\t// %R0 :={SF} Mem(%M1{byte}) + // %R0 := #%1 (SF)\n\tCOPY.%# %L1,%L0\n\tCOPY.%# %U1,%U0 + STL %R1,%a0\t\t// Mem(%M0{byte}) :={SF} %R1") + +;;=========================================================================== +;; NOP +;;=========================================================================== + +;; No-operation (NOP) +(define_insn "nop" + [(const_int 0)] + "" + "NOP\t// nop" + [(set_attr "length" "1")]) + +;;=========================================================================== +;; Function Calls. Define expands are used to ensure that the correct +;; type of pattern is emitted, and then the define_insn's match the +;; pattern using the correct types. +;; +;; Note: The comments output as part of these instructions are detected by +;; the linker. Don't change the comments! +;;=========================================================================== + +(define_expand "call" + [(parallel [(call (match_operand:QI 0 "memory_operand" "") + (match_operand 1 "const_int_operand" "")) + (clobber (reg:HI LINK_REGNUM))])] + "" + "") + +(define_insn "call_for_divmod" + [(call (match_operand:QI 0 "memory_operand" "") + (match_operand 1 "const_int_operand" ""))] + "" + "JL (%M0)\t// fn_call %M0%>" + [(set_attr "length" "4") + (set_attr "type" "realBranch") + (set_attr "longConstant" "true")]) + +(define_insn "*call_using_symbol" + [(call (mem:QI (match_operand:HI 0 "immediate_operand" "i")) + (match_operand 1 "const_int_operand" "")) + (clobber (reg:HI LINK_REGNUM))] + "" + "JL (%M0)\t// fn_call %M0%>" + [(set_attr "length" "4") + (set_attr "type" "realBranch") + (set_attr "longConstant" "true")]) + +(define_insn "*call_using_register" + [(call (mem:QI (match_operand:HI 0 "register_operand" "r")) + (match_operand 1 "const_int_operand" "")) + (clobber (reg:HI LINK_REGNUM))] + "" + "JL (%r0)\t// fn_call_unknown %r0%>" + [(set_attr "length" "2") + (set_attr "type" "realBranch") + (set_attr "longConstant" "false")]) + +(define_expand "call_value" + [(parallel [(set (match_operand:HI 0 "" "") + (call:HI (match_operand:QI 1 "memory_operand" "g") + (match_operand 2 "const_int_operand" ""))) + (clobber (reg:HI LINK_REGNUM))])] + "" + "") + +(define_insn "*call_value_using_symbol" + [(set (match_operand:HI 0 "" "") + (call:HI (mem:QI (match_operand:HI 1 "immediate_operand" "i")) + (match_operand 2 "const_int_operand" ""))) + (clobber (reg:HI LINK_REGNUM))] + "" + "JL (%M1)\t// fn_call %M1 (value return)%>" + [(set_attr "length" "4") + (set_attr "type" "realBranch") + (set_attr "longConstant" "true")]) + +(define_insn "*call_value_using_register" + [(set (match_operand:HI 0 "" "") + (call:HI (mem:QI (match_operand:HI 1 "register_operand" "r")) + (match_operand 2 "const_int_operand" ""))) + (clobber (reg:HI LINK_REGNUM))] + "" + "JL (%r1)// fn_call_unknown %r1 (value return)%>" + [(set_attr "length" "2") + (set_attr "type" "realBranch") + (set_attr "longConstant" "false")]) + +;;=========================================================================== +;; Addition +;;=========================================================================== + +;; Note that the addition of a negative value is transformed into the +;; subtraction of a positive value, so that the add/sub immediate slot +;; can make better use of the 4-bit range. + +(define_insn "addhi3" + [(set (match_operand:HI 0 "register_operand" "=r,r,r,r") + (plus:HI (match_operand:HI 1 "register_operand" "r,r,r,r") + (match_operand:HI 2 "general_operand" "r,M,n,i"))) + (clobber (reg:CC CC_REGNUM))] + "" + { if (CONST_INT == GET_CODE(operands[2]) && + INTVAL(operands[2]) > -16 && + INTVAL(operands[2]) < 0) + return "SUB.%# %1,-(%2),%0\t// %0 := %1 + %2 (HI)"; + else + return "ADD.%# %1,%2,%0\t// %0 := %1 + %2 (HI)"; + } + [(set_attr "type" "basicAlu,basicAlu,basicAlu,basicAlu") + (set_attr "longConstant" "false,false,true,true") + (set_attr "length" "2,2,4,4")] + ) + + +;; If we peepholed the compare instruction out, we need to make sure the add +;; goes in slot 0. This pattern is just to accomplish that. + +(define_insn "addhi3_with_use_clause" + [(set (match_operand:HI 0 "register_operand" "=r,r,r,r") + (plus:HI (match_operand:HI 1 "register_operand" "r,r,r,r") + (match_operand:HI 2 "general_operand" "r,M,n,i"))) + (set (reg:CC CC_REGNUM) + (match_operator:CC 3 "picochip_peephole_comparison_operator" + [(const_int 0) + (const_int 0)]))] + "" + { if (CONST_INT == GET_CODE(operands[2]) && + INTVAL(operands[2]) > -16 && + INTVAL(operands[2]) < 0) + return "SUB.0 %1,-(%2),%0\t// %0 := %1 + %2 (HI)"; + else + return "ADD.0 %1,%2,%0\t// %0 := %1 + %2 (HI)"; + } + [(set_attr "type" "picoAlu,picoAlu,picoAlu,picoAlu") + (set_attr "longConstant" "false,false,true,true") + (set_attr "length" "2,2,4,4")] + ) + +;; Match an addition in which the first operand has been shifted +;; (e.g., the comms array functions can emit such instructions). +(define_insn "*addWith1stOpShift" + [(set (match_operand:HI 0 "register_operand" "=r,r") + (plus:HI (ashift:HI (match_operand:HI 1 "register_operand" "r,r") + (match_operand:HI 2 "const_int_operand" "")) + (match_operand:HI 3 "immediate_operand" "I,i"))) + (clobber (reg:CC CC_REGNUM))] + "" + "ADD.0 [LSL %1,%2],%3,%0\t// %0 := (%1 << %2) + %3" + [(set_attr "type" "picoAlu,picoAlu") + (set_attr "longConstant" "false,true")]) + +(define_insn_and_split "addsi3" + [(set (match_operand:SI 0 "register_operand" "=r,r") + (plus:SI (match_operand:SI 1 "register_operand" "r,r") + (match_operand:SI 2 "general_operand" "r,i"))) + (clobber (reg:CC CC_REGNUM))] + "" + "// %0 := %1 + %2 (SI)\n\tADD.0 %L1,%L2,%L0\n\tADDC.0 %U1,%U2,%U0" + "reload_completed && picochip_schedule_type != DFA_TYPE_NONE" + [(match_dup 4) + (match_dup 5)] + " +{ + rtx op0_high = gen_highpart (HImode, operands[0]); + rtx op1_high = gen_highpart (HImode, operands[1]); + rtx op0_low = gen_lowpart (HImode, operands[0]); + rtx op1_low = gen_lowpart (HImode, operands[1]); + rtx op2_high, op2_low; + + if (CONST_INT == GET_CODE(operands[2])) + { + op2_high = picochip_get_high_const(operands[2]); + op2_low = picochip_get_low_const(operands[2]); + } else { + op2_high = gen_highpart (HImode, operands[2]); + op2_low = gen_lowpart (HImode, operands[2]); + } + + operands[4] = gen_add_multi_lower (op0_low, op1_low, op2_low); + operands[5] = gen_add_multi_upper (op0_high, op1_high, op2_high); + +}") + +;; Perform the lowest part of a multi-part addition (SI/DI). This sets +;; the flags, so is an picoAlu instruction (we could use a +;; conventional addhi, but the addhi is better off being a treated as +;; a basicAlu instruction, rather than a picoAlu instruction). +(define_insn "add_multi_lower" + [(set (match_operand:HI 0 "register_operand" "=r,r,r") + (plus:HI (match_operand:HI 1 "register_operand" "r,r,r") + (match_operand:HI 2 "general_operand" "r,M,i"))) + (set (reg:CC CC_REGNUM) + (compare:CC (plus:HI (match_dup 1) + (match_dup 2)) + (const_int 0)))] + "" + { if (CONST_INT == GET_CODE(operands[2]) && + INTVAL(operands[2]) > -16 && + INTVAL(operands[2]) < 0) + return "SUB.%# %1,-(%2),%0\t// %0+carry := %1 + %2 (low multi-part)"; + else + return "ADD.%# %1,%2,%0\t// %0+carry := %1 + %2 (low multi-part)"; + } + [(set_attr "type" "picoAlu,picoAlu,picoAlu") + (set_attr "longConstant" "false,false,true") + (set_attr "length" "2,2,4")]) + +;; Perform the central part of a multi-part addition (DI). This uses +;; the CC register, and also sets the CC register, so needs to be +;; placed in the first ALU slot. Note that the ADDC must +;; use the long constant to represent immediates. +(define_insn "add_multi_mid" + [(set (match_operand:HI 0 "register_operand" "=r,r") + (plus:HI (match_operand:HI 1 "register_operand" "r,r") + (plus:HI (match_operand:HI 2 "general_operand" "r,i") + (reg:CC CC_REGNUM)))) + (set (reg:CC CC_REGNUM) + (compare:CC (plus:HI (match_dup 1) + (match_dup 2)) + (const_int 0)))] + "" + "ADDC.%# %1,%2,%0\t// %0+carry := carry + %1 + %2 (mid multi-part)" + [(set_attr "type" "picoAlu,picoAlu") + (set_attr "longConstant" "false,true") + (set_attr "length" "2,4")]) + +;; Perform the highest part of a multi-part addition (SI/DI). This +;; uses the CC register, but doesn't require any registers to be set, +;; so may be scheduled in either of the ALU's. Note that the ADDC must +;; use the long constant to represent immediates. +(define_insn "add_multi_upper" + [(set (match_operand:HI 0 "register_operand" "=r,r") + (plus:HI (match_operand:HI 1 "register_operand" "r,r") + (plus:HI (match_operand:HI 2 "general_operand" "r,i") + (reg:CC CC_REGNUM)))) + (clobber (reg:CC CC_REGNUM))] + "" + "ADDC.%# %1,%2,%0\t// %0 := carry + %1 + %2 (high multi-part)" + [(set_attr "type" "basicAlu,basicAlu") + (set_attr "longConstant" "false,true") + (set_attr "length" "2,4")]) + +;; The lea instruction is a special type of add operation, which looks +;; like a movhi (reg := address). It expands into reg := fp + +;; offset. Ideally there should be two variants, which take different +;; sized offsets (i.e., using the long constant, or not, as +;; appropriate). However, the address operand may have arbitrary +;; values added to it later (i.e., the AP will be eliminated, possibly +;; converting a small offset into a long offset), so a long offset is +;; always assumed. + +;; Note that the lea can use an addition, and hence may modify the CC +;; register. This upsets scheduling, so instead the lea is placed in +;; ALU 1 where it cannot modify CC. + +(define_insn "*lea_add" + [(set (match_operand:HI 0 "register_operand" "=r") + (plus:HI (match_operand:HI 1 "register_operand" "r") + (match_operand:HI 2 "immediate_operand" "i")))] + "" + "ADD.1 %1,%2,%0\t// lea (add)") + +;; Note that, though this instruction looks similar to movhi pattern, +;; "p" constraint cannot be specified for operands other than +;; address_operand, hence the extra pattern below. +(define_insn "*lea_move" + [(set (match_operand:HI 0 "nonimmediate_operand" "=r,r") + (match_operand:HI 1 "address_operand" "p,b"))] + "" + { + if (REG == GET_CODE(operands[1])) + return "COPY.1 %1,%0\t// %0 := %1 (lea)"; + else + return "ADD.1 %b1,%o1,%0\t\t// %0 := %b1 + %o1 (lea)"; + } + [(set_attr "type" "nonCcAlu") + (set_attr "longConstant" "true") + (set_attr "length" "4")]) + + +;;=========================================================================== +;; Subtraction. Note that these patterns never take immediate second +;; operands, since those cases are handled by canonicalising the +;; instruction into the addition of a negative costant. +;; But, if the first operand needs to be a negative constant, it +;; is supported here. +;;=========================================================================== + +(define_insn "subhi3" + [(set (match_operand:HI 0 "register_operand" "=r,r,r") + (minus:HI (match_operand:HI 1 "general_operand" "r,I,i") + (match_operand:HI 2 "register_operand" "r,r,r"))) + (clobber (reg:CC CC_REGNUM))] + "" + "SUB.%# %1,%2,%0 // %0 := %1 - %2 (HI)" + [(set_attr "type" "basicAlu,basicAlu,basicAlu") + (set_attr "longConstant" "false,true,true") + (set_attr "length" "2,4,4")]) + +;; If we peepholed the compare instruction out, we need to make sure the +;; sub goes in slot 0. This pattern is just to accomplish that. + +(define_insn "subhi3_with_use_clause" + [(set (match_operand:HI 0 "register_operand" "=r,r,r") + (minus:HI (match_operand:HI 1 "general_operand" "r,I,i") + (match_operand:HI 2 "register_operand" "r,r,r"))) + (set (reg:CC CC_REGNUM) + (match_operator:CC 3 "picochip_peephole_comparison_operator" + [(const_int 0) + (const_int 0)]))] + "" + "SUB.0 %1,%2,%0 // %0 := %1 - %2 (HI)" + [(set_attr "type" "picoAlu,picoAlu,picoAlu") + (set_attr "longConstant" "false,true,true") + (set_attr "length" "2,4,4")]) + +(define_insn_and_split "subsi3" + [(set (match_operand:SI 0 "register_operand" "=r,r") + (minus:SI (match_operand:SI 1 "general_operand" "r,i") + (match_operand:SI 2 "register_operand" "r,r"))) + (clobber (reg:CC CC_REGNUM))] + "" + "// %0 := %1 - %2 (SI)\n\tSUB.%# %L1,%L2,%L0\n\tSUBB.%# %U1,%U2,%U0" + "reload_completed && picochip_schedule_type != DFA_TYPE_NONE" + [(match_dup 4) + (match_dup 5)] + " +{ + rtx op0_high = gen_highpart (HImode, operands[0]); + rtx op0_low = gen_lowpart (HImode, operands[0]); + rtx op2_high = gen_highpart (HImode, operands[2]); + rtx op2_low = gen_lowpart (HImode, operands[2]); + rtx op1_high,op1_low; + + if (CONST_INT == GET_CODE(operands[1])) + { + op1_high = picochip_get_high_const(operands[1]); + op1_low = picochip_get_low_const(operands[1]); + } else { + op1_high = gen_highpart (HImode, operands[1]); + op1_low = gen_lowpart (HImode, operands[1]); + } + + + operands[4] = gen_sub_multi_lower (op0_low, op1_low, op2_low); + operands[5] = gen_sub_multi_upper (op0_high, op1_high, op2_high); + +}") + +;; Match the patterns emitted by the multi-part subtraction splitting. +;; This sets the CC register, so it needs to go into slot 0. +(define_insn "sub_multi_lower" + [(set (match_operand:HI 0 "register_operand" "=r,r") + (minus:HI (match_operand:HI 1 "general_operand" "r,i") + (match_operand:HI 2 "register_operand" "r,r"))) + (set (reg:CC CC_REGNUM) + (compare:CC (minus:HI (match_dup 1) (match_dup 2)) + (const_int 0)))] + "" + "SUB.%# %1,%2,%0\t// %0+carry := %1 - %2 (lower SI)" + [(set_attr "type" "picoAlu,picoAlu") + (set_attr "longConstant" "false,true") + (set_attr "length" "2,4")]) + +;; Perform the central part of a multi-part addition (DI). This uses +;; the CC register, and also sets the CC register, so needs to be +;; placed in the first ALU. +(define_insn "sub_multi_mid" + [(set (match_operand:HI 0 "register_operand" "=r,r") + (minus:HI (match_operand:HI 1 "general_operand" "r,i") + (minus:HI (match_operand:HI 2 "register_operand" "r,r") + (reg:CC CC_REGNUM)))) + (set (reg:CC CC_REGNUM) + (compare:CC (minus:HI (match_dup 1) + (match_dup 2)) + (const_int 0)))] + "" + "SUBB.%# %1,%2,%0\t// %0+carry := carry - %1 - %2 (mid multi-part)" + [(set_attr "type" "picoAlu,picoAlu") + (set_attr "longConstant" "false,true") + (set_attr "length" "2,4")]) + +(define_insn "sub_multi_upper" + [(set (match_operand:HI 0 "register_operand" "=r,r") + (minus:HI (match_operand:HI 1 "general_operand" "r,i") + (minus:HI (match_operand:HI 2 "register_operand" "r,r") + (reg:CC CC_REGNUM)))) + (clobber (reg:CC CC_REGNUM))] + "" + "SUBB.%# %1,%2,%0\t// %0 := carry - %1 - %2 (upper SI)" + [(set_attr "type" "basicAlu,basicAlu") + (set_attr "longConstant" "false,true") + (set_attr "length" "2,4")]) + +;;=========================================================================== +;; Multiplication (signed) +;;=========================================================================== + +(define_insn "multiply_machi" + [(set (reg:HI ACC_REGNUM) + (mult:HI (match_operand:HI 0 "register_operand" "r,r") + (match_operand:HI 1 + "picochip_register_or_immediate_operand" "r,i")))] + "TARGET_HAS_MAC_UNIT" + "MUL %0,%1,acc0\t// acc0 := %0 * %1 (signed)" + [(set_attr "length" "3,5") + (set_attr "type" "mac,mac") + (set_attr "longConstant" "false,true")]) + +(define_expand "mulhi3" + [(set (match_operand:HI 0 "register_operand" "") + (mult:HI (match_operand:HI 1 "register_operand" "") + (match_operand:HI 2 "picochip_register_or_immediate_operand" "")))] + "TARGET_HAS_MULTIPLY" + "") + +;; Different types of mulhi, depending on the AE type. If the AE has MUL unit, +;; use the following pattern. +(define_insn "*mulhi3_mul" + [(set (match_operand:HI 0 "register_operand" "=r,r") + (mult:HI (match_operand:HI 1 "register_operand" "r,r") + (match_operand:HI 2 + "picochip_register_or_immediate_operand" "r,i")))] + "TARGET_HAS_MUL_UNIT" + "MULL %1,%2,%0 // %0 := %1 * %2 (HI)" + [(set_attr "length" "3,5") + (set_attr "type" "mul,mul") + (set_attr "longConstant" "false,true")]) + +;; If the AE has MAC unit, instead, use the following pattern. +(define_insn_and_split "*mulhi3_mac" + [(set (match_operand:HI 0 "register_operand" "=r,r") + (mult:HI (match_operand:HI 1 "register_operand" "r,r") + (match_operand:HI 2 + "picochip_register_or_immediate_operand" "r,i")))] + "TARGET_HAS_MAC_UNIT" + "// %0 := %1 * %2\n\tMUL %1,%2,acc0\n\tREADACC acc0,frac,%0" + "TARGET_HAS_MAC_UNIT && reload_completed" + [(match_dup 3) + (match_dup 4)] + " +{ + rtx const_rtx = GEN_INT(0); + operands[3] = (gen_multiply_machi(operands[1], operands[2])); + operands[4] = (gen_movhi_mac(operands[0],const_rtx)); +} " +) + +(define_insn "umultiply_machisi" + [(set (reg:SI ACC_REGNUM) + (mult:SI (zero_extend:SI (match_operand:HI 0 "register_operand" "r")) + (zero_extend:SI (match_operand:HI 1 "register_operand" "r"))))] + "TARGET_HAS_MAC_UNIT" + "MULUU %0,%1,acc0\t// acc0 := %0 * %1 (unsigned)" + [(set_attr "length" "3") + (set_attr "type" "mac") + (set_attr "longConstant" "false")]) + +(define_insn "multiply_machisi" + [(set (reg:SI ACC_REGNUM) + (mult:SI (sign_extend:SI (match_operand:HI 0 "register_operand" "r,r")) + (sign_extend:SI (match_operand:HI 1 + "picochip_register_or_immediate_operand" "r,i"))))] + "TARGET_HAS_MAC_UNIT" + "MUL %0,%1,acc0\t// acc0 := %0 * %1 (signed)" + [(set_attr "length" "3,5") + (set_attr "type" "mac,mac") + (set_attr "longConstant" "false,true")]) + +;; We want to prevent GCC from thinking ACC is a normal register and using +;; this pattern. We want it to be used only when you use MAC unit +;; multiplication. Added a "use" clause for that sake. +(define_insn "movsi_mac" + [(set (match_operand:SI 0 "register_operand" "=r") + (reg:SI ACC_REGNUM)) + (use (match_operand:SI 1 "const_int_operand" ""))] + "TARGET_HAS_MAC_UNIT" + "READACC32 acc0,%R0 \t// %0 := acc0 " + [(set_attr "length" "3") + (set_attr "type" "mac") + (set_attr "longConstant" "false")]) + +;; We want to prevent GCC from thinking ACC is a normal register and using +;; this pattern. We want it to be used only when you use MAC unit +;; multiplication. Added a "use" clause for that sake. +(define_insn "movhi_mac" + [(set (match_operand:HI 0 "register_operand" "=r") + (reg:HI ACC_REGNUM) ) + (use (match_operand:HI 1 "const_int_operand" ""))] + "TARGET_HAS_MAC_UNIT" + "READACC acc0,frac,%0 \t// %0 := acc0 " + [(set_attr "length" "3") + (set_attr "type" "mac") + (set_attr "longConstant" "false")]) + +;; 16-bit to 32-bit widening signed multiplication. +(define_expand "mulhisi3" + [(set (match_operand:SI 0 "register_operand" "=&r") + (mult:SI (sign_extend:SI (match_operand:HI 1 "register_operand" "r")) + (sign_extend:SI (match_operand:HI 2 "register_operand" "r"))))] + "TARGET_HAS_MULTIPLY" + "" +) + +(define_insn_and_split "*mulhisi3_mul" + [(set (match_operand:SI 0 "register_operand" "=&r") + (mult:SI (sign_extend:SI (match_operand:HI 1 "register_operand" "r")) + (sign_extend:SI (match_operand:HI 2 "register_operand" "r"))))] + "TARGET_HAS_MUL_UNIT" + "// %0 := %1 * %2 (HI->SI)\;MULL %1,%2,%L0\;MULH %1,%2,%U0"; + "TARGET_HAS_MUL_UNIT && reload_completed && picochip_schedule_type != DFA_TYPE_NONE" + [(match_dup 3) + (match_dup 4)] + " +{ + rtx op0_high = gen_highpart (HImode, operands[0]); + rtx op0_low = gen_lowpart (HImode, operands[0]); + operands[3] = gen_mulhisi3_mul_lower(op0_low,operands[1],operands[2]); + operands[4] = gen_mulhisi3_mul_higher(op0_high,operands[1],operands[2]); +} + " +) + +(define_insn "mulhisi3_mul_lower" + [(set (match_operand:HI 0 "register_operand" "=&r") + (subreg:HI + (mult:SI + (sign_extend:SI (match_operand:HI 1 "register_operand" "r")) + (sign_extend:SI (match_operand:HI 2 "register_operand" "r"))) 0))] + "TARGET_HAS_MUL_UNIT" + "MULL %1,%2,%0" + [(set_attr "length" "3") + (set_attr "type" "mul") + (set_attr "longConstant" "false")]) + +(define_insn "mulhisi3_mul_higher" + [(set (match_operand:HI 0 "register_operand" "=&r") + (subreg:HI + (mult:SI + (sign_extend:SI (match_operand:HI 1 "register_operand" "r")) + (sign_extend:SI (match_operand:HI 2 "register_operand" "r"))) 2))] + "TARGET_HAS_MUL_UNIT" + "MULH %1,%2,%0" + [(set_attr "length" "3") + (set_attr "type" "mul") + (set_attr "longConstant" "false")]) + +(define_insn_and_split "*mulhisi3_mac" + [(set (match_operand:SI 0 "register_operand" "=&r") + (mult:SI (sign_extend:SI (match_operand:HI 1 "register_operand" "r")) + (sign_extend:SI (match_operand:HI 2 "register_operand" "r"))))] + "TARGET_HAS_MAC_UNIT" + "// %0 := %1 * %2 (HI->SI) STAN2\;MUL %1,%2,acc0\;READACC32 acc0,%R0"; + "TARGET_HAS_MAC_UNIT && reload_completed" + [(match_dup 3) + (match_dup 4)] + " +{ + rtx const_rtx = gen_int_mode(0,SImode); + operands[3] = (gen_multiply_machisi(operands[1], operands[2])); + operands[4] = (gen_movsi_mac(operands[0],const_rtx)); +} " +) + +;;=========================================================================== +;; Widening multiplication (unsigned) +;;=========================================================================== + +(define_expand "umulhisi3" + [(set (match_operand:SI 0 "register_operand" "=&r") + (mult:SI (zero_extend:SI (match_operand:HI 1 "register_operand" "r")) + (zero_extend:SI (match_operand:HI 2 "register_operand" "r"))))] + "TARGET_HAS_MULTIPLY" + "" +) + +(define_insn_and_split "*umulhisi3_mul" + [(set (match_operand:SI 0 "register_operand" "=&r") + (mult:SI (zero_extend:SI (match_operand:HI 1 "register_operand" "r")) + (zero_extend:SI (match_operand:HI 2 "register_operand" "r"))))] + "TARGET_HAS_MUL_UNIT" + "// %0 := %1 * %2 (uHI->uSI Type 1)\;MULUL %1,%2,%L0\n\tMULUH %1,%2,%U0"; + "TARGET_HAS_MUL_UNIT && reload_completed && picochip_schedule_type != DFA_TYPE_NONE" + [(match_dup 3) + (match_dup 4)] + " +{ + rtx op0_high = gen_highpart (HImode, operands[0]); + rtx op0_low = gen_lowpart (HImode, operands[0]); + operands[3] = gen_umulhisi3_mul_lower(op0_low,operands[1],operands[2]); + operands[4] = gen_umulhisi3_mul_higher(op0_high,operands[1],operands[2]); +} + " + ) + +(define_insn "umulhisi3_mul_lower" + [(set (match_operand:HI 0 "register_operand" "=&r") + (subreg:HI + (mult:SI + (zero_extend:SI (match_operand:HI 1 "register_operand" "r")) + (zero_extend:SI (match_operand:HI 2 "register_operand" "r"))) 0))] + "TARGET_HAS_MUL_UNIT" + "MULUL %1,%2,%0" + [(set_attr "length" "3") + (set_attr "type" "mul") + (set_attr "longConstant" "false")]) + +(define_insn "umulhisi3_mul_higher" + [(set (match_operand:HI 0 "register_operand" "=&r") + (subreg:HI + (mult:SI + (zero_extend:SI (match_operand:HI 1 "register_operand" "r")) + (zero_extend:SI (match_operand:HI 2 "register_operand" "r"))) 2))] + "TARGET_HAS_MUL_UNIT" + "MULUH %1,%2,%0" + [(set_attr "length" "3") + (set_attr "type" "mul") + (set_attr "longConstant" "false")]) + +(define_insn_and_split "*umulhisi3_mac" + [(set (match_operand:SI 0 "register_operand" "=&r") + (mult:SI (zero_extend:SI (match_operand:HI 1 "register_operand" "r")) + (zero_extend:SI (match_operand:HI 2 "register_operand" "r"))))] + "TARGET_HAS_MAC_UNIT" + "// %0 := %1 * %2 (uHI->uSI Type 3)\;MULUU %1,%2,acc0\;READACC32 acc0,%R0"; + "TARGET_HAS_MAC_UNIT && reload_completed" + [(match_dup 3) + (match_dup 4)] + " +{ + rtx const_rtx = gen_int_mode(0,SImode); + operands[3] = (gen_umultiply_machisi(operands[1], operands[2])); + operands[4] = (gen_movsi_mac(operands[0],const_rtx)); +} " +) + +;;=========================================================================== +;; Division (signed) +;;=========================================================================== + +;; Perform a divmod operation as a function call. This results in some +;; registers being clobbered (r0-6, r12 - ignore r13,14 as these are +;; known not to be affected). +(define_expand "divmodhi4" + [ + ; Copy the inputs to r0 and r1. + (set (reg:HI 0) (match_operand:HI 1 "register_operand" "")) + (set (reg:HI 1) (match_operand:HI 2 "register_operand" "")) + ; Make the function call - note that r12 (link) is clobbered. Note also + ; that an explicit call is generated. This ensures that gcc notices that + ; any function containing a div/mod is not a leaf function. + (parallel [(match_dup 4) + (set (reg:HI 0) (div:HI (reg:HI 0) (reg:HI 1))) + (set (reg:HI 1) (mod:HI (reg:HI 0) (reg:HI 1))) + (clobber (reg:HI 2)) + (clobber (reg:HI 3)) + (clobber (reg:HI 4)) + (clobber (reg:HI 5)) + (clobber (reg:HI 12)) + (clobber (reg:CC CC_REGNUM)) + ]) + ; Set the quotient (returned in register 0) + (set (match_operand:HI 0 "register_operand" "") (reg:HI 0)) + ; Set the remainder (returned in register 1) + (set (match_operand:HI 3 "register_operand" "") (reg:HI 1))] + "" +{ + rtx fnName = gen_rtx_SYMBOL_REF (HImode, "_divmodhi4"); + operands[4] = gen_call_for_divmod (gen_rtx_MEM (QImode, fnName), GEN_INT(0)); +}) + +; Match a call to divmodhi4. As this is a call, the link register +; (r12), and registers r0-5 must be clobbered. Ignore clobbering of +; r13/4 as these aren't used by the divide function). +(define_insn "*divmodhi4_call" + [(call (mem:QI (match_operand:HI 0 "immediate_operand" "i")) + (match_operand 1 "const_int_operand" "")) + (set (reg:HI 0) (div:HI (reg:HI 0) (reg:HI 1))) + (set (reg:HI 1) (mod:HI (reg:HI 0) (reg:HI 1))) + (clobber (reg:HI 2)) + (clobber (reg:HI 3)) + (clobber (reg:HI 4)) + (clobber (reg:HI 5)) + (clobber (reg:HI 12)) + (clobber (reg:CC CC_REGNUM)) +] + "" + "JL (%0)\t// call %0%>" + [(set_attr "length" "4") + (set_attr "longConstant" "true") + (set_attr "type" "call")]) + +;; Perform a udivmod operation as a function call. This results in some +;; registers being clobbered (r0-6, r12 - ignore r13,14 as these are +;; known not to be affected). +(define_expand "udivmodhi4" + [ + ; Copy the inputs to r0 and r1. + (set (reg:HI 0) (match_operand:HI 1 "register_operand" "")) + (set (reg:HI 1) (match_operand:HI 2 "register_operand" "")) + ; Make the function call - note that r12 (link) is clobbered. Note also + ; that an explicit call is generated. This ensures that gcc notices that + ; any function containing a div/mod is not a leaf function. + (parallel [(match_dup 4) + (set (reg:HI 0) (udiv:HI (reg:HI 0) (reg:HI 1))) + (set (reg:HI 1) (umod:HI (reg:HI 0) (reg:HI 1))) + (clobber (reg:HI 2)) + (clobber (reg:HI 3)) + (clobber (reg:HI 4)) + (clobber (reg:HI 5)) + (clobber (reg:HI 12)) + (clobber (reg:CC CC_REGNUM)) + ]) + ; Set the quotient (returned in register 0) + (set (match_operand:HI 0 "register_operand" "") (reg:HI 0)) + ; Set the remainder (returned in register 1) + (set (match_operand:HI 3 "register_operand" "") (reg:HI 1))] + "" +{ + rtx fnName = gen_rtx_SYMBOL_REF (HImode, "_udivmodhi4"); + operands[4] = gen_call_for_divmod (gen_rtx_MEM (QImode, fnName), GEN_INT(0)); +}) + +; Match a call to udivmodhi4. As this is a call, the link register +; (r12), and registers r0-5 must be clobbered. Ignore clobbering of +; r13/4 as these aren't used by the divide function). +(define_insn "*udivmodhi4_call" + [(call (mem:QI (match_operand:HI 0 "immediate_operand" "i")) + (match_operand 1 "const_int_operand" "")) + (set (reg:HI 0) (udiv:HI (reg:HI 0) (reg:HI 1))) + (set (reg:HI 1) (umod:HI (reg:HI 0) (reg:HI 1))) + (clobber (reg:HI 2)) + (clobber (reg:HI 3)) + (clobber (reg:HI 4)) + (clobber (reg:HI 5)) + (clobber (reg:HI 12)) + (clobber (reg:CC CC_REGNUM))] + "" + "JL (%0)\t// call %0%>" + [(set_attr "length" "4") + (set_attr "longConstant" "true") + (set_attr "type" "call")]) + +(define_expand "udivmodsi4" + [ + ; Make the function call + (set (reg:SI 0) (match_operand:SI 1 "register_operand" "")) + (set (reg:SI 2) (match_operand:SI 2 "register_operand" "")) + (parallel [ + (match_dup 4) + (set (reg:SI 4) (udiv:SI (reg:SI 0) (reg:SI 2))) + (set (reg:SI 6) (umod:SI (reg:SI 0) (reg:SI 2))) + (clobber (reg:SI 0)) + (clobber (reg:SI 2)) + (clobber (reg:HI 12)) + (clobber (reg:CC CC_REGNUM))]) + (set (match_operand:SI 0 "register_operand" "") (reg:SI 4)) + (set (match_operand:SI 3 "register_operand" "") (reg:SI 6))] + "" +{ + rtx fnName = gen_rtx_SYMBOL_REF (HImode, "_udivmodsi4"); + operands[4] = gen_call_for_divmod (gen_rtx_MEM (QImode, fnName), GEN_INT(0)); +}) + +(define_insn "*udivmodsi4_call" + [(call (mem:QI (match_operand:HI 0 "immediate_operand" "i")) + (match_operand 1 "const_int_operand" "")) + (set (reg:SI 4) (udiv:SI (reg:SI 0) (reg:SI 2))) + (set (reg:SI 6) (umod:SI (reg:SI 0) (reg:SI 2))) + (clobber (reg:SI 0)) + (clobber (reg:SI 2)) + (clobber (reg:HI 12)) + (clobber (reg:CC CC_REGNUM))] + "" + "JL (%0)\t// call %0%>" + [(set_attr "length" "4") + (set_attr "longConstant" "true") + (set_attr "type" "call")]) + +(define_expand "divmodsi4" + [ + ; Make the function call + (set (reg:SI 0) (match_operand:SI 1 "register_operand" "")) + (set (reg:SI 2) (match_operand:SI 2 "register_operand" "")) + (parallel [ + (match_dup 4) + (set (reg:SI 4) (div:SI (reg:SI 0) (reg:SI 2))) + (set (reg:SI 6) (mod:SI (reg:SI 0) (reg:SI 2))) + (clobber (reg:SI 0)) + (clobber (reg:SI 2)) + (clobber (reg:HI 12)) + (clobber (reg:CC CC_REGNUM))]) + (set (match_operand:SI 0 "register_operand" "") (reg:SI 4)) + (set (match_operand:SI 3 "register_operand" "") (reg:SI 6))] + "" +{ + rtx fnName = gen_rtx_SYMBOL_REF (HImode, "_divmodsi4"); + operands[4] = gen_call_for_divmod (gen_rtx_MEM (QImode, fnName), GEN_INT(0)); +}) + +(define_insn "*divmodsi4_call" + [(call (mem:QI (match_operand:HI 0 "immediate_operand" "i")) + (match_operand 1 "const_int_operand" "")) + (set (reg:SI 4) (div:SI (reg:SI 0) (reg:SI 2))) + (set (reg:SI 6) (mod:SI (reg:SI 0) (reg:SI 2))) + (clobber (reg:SI 0)) + (clobber (reg:SI 2)) + (clobber (reg:HI 12)) + (clobber (reg:CC CC_REGNUM))] + "" + "JL (%0)\t// call %0%>" + [(set_attr "length" "4") + (set_attr "longConstant" "true") + (set_attr "type" "call")]) + +;;=========================================================================== +;; Bitwise AND. The QI/SI mode instructions are automatically +;; synthesised from the HI mode instruction. +;;=========================================================================== + +(define_insn "andhi3" + [(set (match_operand:HI 0 "register_operand" "=r,r") + (and:HI (match_operand:HI 1 "register_operand" "r,r") + (match_operand:HI 2 "general_operand" "r,n"))) + (clobber (reg:CC CC_REGNUM))] + "" + "AND.%# %1,%2,%0 // %0 := %1 AND %2 (HI)" + [(set_attr "type" "basicAlu,basicAlu") + (set_attr "longConstant" "false,true") + (set_attr "length" "3,5")]) + +;; If we peepholed the compare instruction out, we need to make sure the +;; "and" goes in slot 0. This pattern is just to accomplish that. + +(define_insn "andhi3_with_use_clause" + [(set (match_operand:HI 0 "register_operand" "=r,r") + (and:HI (match_operand:HI 1 "register_operand" "r,r") + (match_operand:HI 2 "general_operand" "r,n"))) + (set (reg:CC CC_REGNUM) + (match_operator:CC 3 "picochip_peephole_comparison_operator" + [(const_int 0) + (const_int 0)]))] + "" + "AND.0 %1,%2,%0 // %0 := %1 AND %2 (HI)" + [(set_attr "type" "picoAlu,picoAlu") + (set_attr "longConstant" "false,true") + (set_attr "length" "3,5")]) + +;;=========================================================================== +;; Bitwise inclusive-OR. The QI mode instruction is automatically +;; synthesised from the HI mode instruction. +;;=========================================================================== + +(define_insn "iorhi3" + [(set (match_operand:HI 0 "register_operand" "=r,r") + (ior:HI (match_operand:HI 1 "register_operand" "r,r") + (match_operand:HI 2 "register_operand" "r,n"))) + (clobber (reg:CC CC_REGNUM))] + "" + "OR.%# %1,%2,%0 // %0 := %1 IOR %2 (HI)" + [(set_attr "type" "basicAlu,basicAlu") + (set_attr "longConstant" "false,true") + (set_attr "length" "3,5")]) + +(define_insn "iorhi3_with_use_clause" + [(set (match_operand:HI 0 "register_operand" "=r,r") + (ior:HI (match_operand:HI 1 "register_operand" "r,r") + (match_operand:HI 2 "general_operand" "r,n"))) + (set (reg:CC CC_REGNUM) + (match_operator:CC 3 "picochip_peephole_comparison_operator" + [(const_int 0) + (const_int 0)]))] + "" + "OR.0 %1,%2,%0 // %0 := %1 IOR %2 (HI)" + [(set_attr "type" "picoAlu,picoAlu") + (set_attr "longConstant" "false,true") + (set_attr "length" "3,5")]) + +;;=========================================================================== +;; Bitwise exclusive-OR. The QI/SI mode instructions are automatically +;; synthesised from the HI mode instruction. +;;=========================================================================== + +(define_insn "xorhi3" + [(set (match_operand:HI 0 "register_operand" "=r,r") + (xor:HI (match_operand:HI 1 "register_operand" "r,r") + (match_operand:HI 2 "picochip_register_or_immediate_operand" "r,n"))) + (clobber (reg:CC CC_REGNUM))] + "" + "XOR.%# %1,%2,%0 // %0 := %1 XOR %2 (HI)" + [(set_attr "type" "basicAlu,basicAlu") + (set_attr "longConstant" "false,true") + (set_attr "length" "3,5")]) + +;;=========================================================================== +;; Arithmetic shift left. +;;=========================================================================== + +(define_insn "ashlhi3" + [(set (match_operand:HI 0 "register_operand" "=r,r") + (ashift:HI (match_operand:HI 1 "register_operand" "r,r") + (match_operand:HI 2 "general_operand" "r,J")))] + "" + "LSL.%# %1,%2,%0 // %0 := %1 << %2" + [(set_attr "type" "picoAlu,basicAlu") + (set_attr "length" "3,3")]) + +;;=========================================================================== +;; Arithmetic shift right. +;;=========================================================================== + +(define_insn "builtin_asri" + [(set (match_operand:HI 0 "register_operand" "=r") + (ashiftrt:HI (match_operand:HI 1 "register_operand" "r") + (match_operand:HI 2 "immediate_operand" ""))) + (clobber (reg:CC CC_REGNUM))] + "" + "ASR.%# %1,%2,%0\t// %0 = %1 >>{arith} %2" + [(set_attr "type" "basicAlu") + (set_attr "length" "3")]) + +;; The picoChip ISA doesn't have a variable arithmetic shift right, so +;; synthesise it. Shifts by constants are directly supported. + +(define_expand "ashrhi3" + [(match_operand:HI 0 "register_operand" "") + (match_operand:HI 1 "register_operand" "") + (match_operand:HI 2 "picochip_register_or_immediate_operand" "")] + "" +{ + if (GET_CODE(operands[2]) == CONST_INT) + /* Shift by constant is easy. */ + emit_insn (gen_builtin_asri (operands[0], operands[1], operands[2])); + else + { + /* Synthesise a variable shift. */ + + /* Fill a temporary with the sign bits. */ + rtx tmp1 = gen_reg_rtx (HImode); + emit_insn (gen_builtin_asri (tmp1, operands[1], GEN_INT(15))); + + /* Shift the unsigned value. */ + rtx tmp2 = gen_reg_rtx (HImode); + emit_insn (gen_lshrhi3 (tmp2, operands[1], operands[2])); + + /* The word of sign bits must be shifted back to the left, to zero + * out the unwanted lower bits. The amount to shift left by is (15 - + * count). Since the shifts are computed modulo 16 (i.e., only the + * lower 4 bits of the count are used), the shift amount (15 - count) + * is equivalent to !count. */ + rtx tmp3 = gen_reg_rtx (HImode); + rtx tmp3_1 = GEN_INT (-1); + emit_insn (gen_xorhi3 (tmp3, operands[2], tmp3_1)); + rtx tmp4 = gen_reg_rtx (HImode); + emit_insn (gen_ashlhi3 (tmp4, tmp1, tmp3)); + + /* Combine the sign bits with the shifted value. */ + emit_insn (gen_iorhi3 (operands[0], tmp2, tmp4)); + + } + DONE; +}) + +;;=========================================================================== +;; Logical shift right. +;;=========================================================================== + +(define_insn "lshrhi3" + [(set (match_operand:HI 0 "register_operand" "=r,r") + (lshiftrt:HI (match_operand:HI 1 "register_operand" "r,r") + (match_operand:HI 2 "general_operand" "r,J")))] + "" + "LSR.%# %1,%2,%0 // %0 := %1 >> %2" + [(set_attr "type" "picoAlu,basicAlu") + (set_attr "length" "3,3")]) + +;;=========================================================================== +;; Negate. +;;=========================================================================== + +;; Negations are performed by subtracting from the constant 0, which +;; is loaded into a register. By using a register containing 0, the +;; chances of being able to CSE with another 0 value are increased. + +(define_expand "neghi2" + [(set (match_dup 2) (match_dup 3)) + (parallel [(set (match_operand:HI 0 "register_operand" "=r") + (minus:HI (match_dup 2) + (match_operand:HI 1 "register_operand" "r"))) + (clobber (reg:CC CC_REGNUM))])] + "" + "operands[2] = gen_reg_rtx(HImode); + operands[3] = GEN_INT(0x00000000);") + +(define_expand "negsi2" + [(set (match_dup 2) (match_dup 3)) + (parallel [(set (match_operand:SI 0 "register_operand" "=r") + (minus:SI (match_dup 2) + (match_operand:SI 1 "register_operand" "r"))) + (clobber (reg:CC CC_REGNUM))])] + "" + "operands[2] = gen_reg_rtx(SImode); + operands[3] = GEN_INT(0x00000000);") + +;;=========================================================================== +;; Absolute value. Taken from the Hacker's Delight, page 17. The second of the +;; four options given there produces the smallest, fastest code. +;;=========================================================================== + +(define_insn_and_split "abshi2" + [(set (match_operand:HI 0 "register_operand" "") + (abs:HI (match_operand:HI 1 "register_operand" "")))] + "" + "#" + "" + [(parallel [(set (match_dup 2) + (plus:HI (ashiftrt:HI (match_dup 1) (const_int 15)) + (match_dup 1))) + (clobber (reg:CC CC_REGNUM))]) + (parallel [(set (match_dup 0) + (xor:HI (ashiftrt:HI (match_dup 1) (const_int 15)) + (match_dup 2))) + (clobber (reg:CC CC_REGNUM))])] +{ + operands[2] = gen_reg_rtx (HImode); +}) + +;;=========================================================================== +;; Bitwise complement. Use auto-synthesised variant for SI mode. Though this +;; internally uses xor, the compiler doesnt automatically synthesize it using +;; xor, if this pattern was removed. +;;=========================================================================== + +(define_insn "one_cmplhi2" + [(set (match_operand:HI 0 "register_operand" "=r") + (not:HI (match_operand:HI 1 "register_operand" "0"))) + (clobber (reg:CC CC_REGNUM))] + "" + "XOR.%# %1,-1,%0 // %0 := ~%1" + [(set_attr "type" "basicAlu") + (set_attr "longConstant" "true") + (set_attr "length" "5")]) + +;;=========================================================================== +;; Count leading zeros. The special sign-bit-count instruction can be used +;; to help us here. +;; op1:=clz(op1) +;; The code works by checking to see if the top bit is set. If it is, +;; then there are no leading zeros. If the top bit is cleared, then +;; the SBC instruction is used to determine how many more leading +;; zeros are present, and adding one more for the initial zero. +;;=========================================================================== + +(define_insn "clzhi2" + [(set (match_operand:HI 0 "register_operand" "=&r") + (clz:HI (match_operand:HI 1 "register_operand" "r")))] + "" + "// Count leading zeros\;SBC %1,%0\;ASR.0 %1,15,r15 %| ADD.1 %0,1,%0\;COPYNE 0,%0" + [(set_attr "length" "11")]) + +;;=========================================================================== +;; Count trailing zeros. This can be achieved efficiently by reversing +;; using the bitrev instruction, and then counting the leading zeros as +;; described above. +;;=========================================================================== + +(define_insn "ctzhi2" + [(set (match_operand:HI 0 "register_operand" "=&r") + (ctz:HI (match_operand:HI 1 "register_operand" "r")))] + "" + "// Count trailing zeros\;BREV %1,%0\;SBC %0,%0\;AND.0 %1,0x0001,r15 %| ADD.1 %0,1,%0\;COPYNE 0,%0" + [(set_attr "length" "15")]) + +;;=========================================================================== +;; Find the first set bit, starting from the least significant bit position. +;; This is very similar to the ctz function, except that the bit index is one +;; greater than the number of trailing zeros (i.e., SBC + 2), and the +;; result of ffs on the zero value is defined. +;;=========================================================================== + +(define_insn "ffshi2" + [(set (match_operand:HI 0 "register_operand" "=&r") + (ffs:HI (match_operand:HI 1 "register_operand" "r")))] + "" + "// First first bit\;BREV %1,%0\;SBC %0,%0\;AND.0 %1,0x0001,r15 %| ADD.1 %0,2,%0\;COPYNE 1,%0\;SUB.0 %1,0x0000,r15\;COPYEQ 0,%0" + [(set_attr "length" "20")]) + +;;=========================================================================== +;; Tablejump Instruction. Jump to an absolute address. +;;=========================================================================== + +(define_insn "tablejump" + [(set (pc) (unspec:HI [(match_operand:HI 0 "register_operand" "r")] 1)) + (use (label_ref (match_operand 1 "" ""))) + (clobber (match_dup 0))] + "" + "JR (%0)\t // Table jump to %0 %>" + [(set_attr "length" "2") + (set_attr "type" "realBranch")]) + +;; Given the memory address of a QImode value, and a scratch register, +;; store the memory operand into the given output operand. The scratch +;; operand will not conflict with either of the operands. The other +;; two operands may conflict with each other. + +(define_insn "synthesised_loadqi_unaligned" + [(set (match_operand:QI 0 "register_operand" "=r") + (match_operand:QI 1 "memory_operand" "m")) + (clobber (match_operand:HI 2 "register_operand" "=&r")) + (clobber (reg:CC CC_REGNUM))] + "" + "// Synthesised loadqi %0 = Mem(%1) (Scratch %2)\n\tAND.0 %1,-2,%2\n\tLDW (%2)0,%0 %| AND.0 %1,1,%2\n\tLSL.0 %2,3,%2\n\tSUB.0 8,%2,%2\n\tLSL.0 %0,%2,%0\n\tASR.0 %0,8,%0" + ; Approximate length only. Probably a little shorter than this. + [(set_attr "length" "40")]) + +;; Given a memory operand whose alignment is known (the HImode aligned +;; base is operand 0, and the number of bits by which to shift is in +;; operand 5), +(define_expand "synthesised_storeqi_aligned" + [; s1 = mem_op + (set (match_operand:HI 2 "register_operand" "") + (match_operand:HI 0 "memory_operand" "")) + ; s1 = s1 and mask + (parallel [(set (match_dup 2) (and:HI (match_dup 2) (match_dup 5))) + (clobber (reg:CC CC_REGNUM))]) + ; s2 = source << bitShift + (set (match_dup 3) + (ashift:HI (subreg:HI (match_operand:QI 1 "register_operand" "") 0) + (match_operand:HI 4 "const_int_operand" ""))) + ; s1 = s1 or s2 + (parallel [(set (match_dup 2) (ior:HI (match_dup 2) (match_dup 3))) + (clobber (reg:CC CC_REGNUM))]) + ; mem_op = s1 + (set (match_dup 0) (match_dup 2))] + "!TARGET_HAS_BYTE_ACCESS" +{ + /* Create the byte mask 0xFF00. */ + operands[5] = gen_int_mode(((~0xFF) >> INTVAL (operands[4])), HImode); +}) + +;; Reload instructions. See picochip_secondary_reload for an +;; explanation of why an SI mode register is used as a scratch. The +;; memory operand must be stored in a register (i.e., it can't be an +;; offset to another register - this would require another scratch +;; register into which the address of the offset could be computed). + +(define_expand "reload_inqi" + [(parallel [(match_operand:QI 0 "register_operand" "=&r") + (match_operand:QI 1 "memory_operand" "m") + (match_operand:SI 2 "register_operand" "=&r")])] + "!TARGET_HAS_BYTE_ACCESS" +{ + rtx scratch, seq; + + /* Get the scratch register. Given an SI mode value, we have a + choice of two HI mode scratch registers, so we can be sure that at + least one of the scratch registers will be different to the output + register, operand[0]. */ + + if (REGNO (operands[0]) == REGNO (operands[2])) + scratch = gen_rtx_REG (HImode, REGNO (operands[2]) + 1); + else + scratch = gen_rtx_REG (HImode, REGNO (operands[2])); + + /* Ensure that the scratch doesn't overlap either of the other + two operands - however, the other two may overlap each + other. */ + gcc_assert (REGNO(scratch) != REGNO(operands[0])); + gcc_assert (REGNO(scratch) != REGNO(operands[1])); + + gcc_assert (GET_CODE (operands[1]) == MEM); + + if (picochip_word_aligned_memory_reference(XEXP(operands[1], 0))) + { + /* Aligned reloads are easy, since they can use word-loads. */ + seq = gen_synthesised_loadqi_aligned(operands[0], operands[1], scratch); + } + else + { + /* Emit the instruction using a define_insn. */ + seq = gen_synthesised_loadqi_unaligned(operands[0], operands[1], scratch); + } + emit_insn (seq); + + DONE; + +}) + +(define_expand "reload_outqi" + [(parallel [(match_operand 0 "memory_operand" "=m") + (match_operand:QI 1 "register_operand" "r") + (match_operand:SI 2 "register_operand" "=&r")])] + "!TARGET_HAS_BYTE_ACCESS" +{ + rtx scratch1 = gen_rtx_REG(HImode, REGNO(operands[2])); + rtx scratch2 = gen_rtx_REG(HImode, REGNO(operands[2]) + 1); + rtx seq; + + gcc_assert (GET_CODE (operands[0]) == MEM); + + if (picochip_word_aligned_memory_reference(XEXP(operands[0], 0))) + { + rtx alignedAddr, bitShift; + + /* Convert the address of the known alignment into two operands + * representing the aligned base address, and the number of shift bits + * required to access the required value. */ + picochip_get_hi_aligned_mem(operands[0], &alignedAddr, &bitShift); + + /* Emit an aligned store of the source, with the given bit offset. */ + seq = gen_synthesised_storeqi_aligned(alignedAddr, operands[1], scratch1, scratch2, bitShift); + + } + else + { + /* This isnt exercised at all. Moreover, with new devices, byte access + is available in all variants. */ + gcc_unreachable(); + } + + emit_insn (seq); + DONE; + +}) + +;; Perform a byte load of an alignable memory operand. +; op0 = register to load. op1 = memory operand from which to load +; op2 = op1, aligned to HI, op3 = const bit shift required to extract byte, +; op4 = INTVAL(8 - op3) +(define_expand "synthesised_loadqi_aligned" + [; Load memory operand into register + (set (match_operand:HI 2 "register_operand" "=r") + (match_dup 3)) + ; Shift required byte into top byte of word. + (set (match_dup 2) + (ashift:HI (match_dup 2) + (match_dup 4))) + ; Arithmetic shift of byte to sign extend, and move to lowest register. + (parallel[(set (subreg:HI (match_dup 0) 0) + (ashiftrt:HI (match_dup 2) + (const_int 8))) + (clobber (reg:CC CC_REGNUM))]) + (use (match_operand:QI 1 "picochip_alignable_memory_operand" "g"))] + "!TARGET_HAS_BYTE_ACCESS" +{ + rtx alignedAddr, bitShift; + + /* Convert the address of the known alignment into two operands + * representing the aligned base address, and the number of shift bits + * required to access the required value. */ + picochip_get_hi_aligned_mem(operands[1], &alignedAddr, &bitShift); + + operands[3] = alignedAddr; + operands[4] = GEN_INT(8 - INTVAL(bitShift)); +}) + +;;============================================================================ +;; Special instructions. +;;============================================================================ + +; Count sign-bits. +(define_insn "sbc" + [(set (match_operand:HI 0 "register_operand" "=r") + (unspec:HI [(match_operand:HI 1 "register_operand" "r")] + UNSPEC_SBC))] + "" + "SBC %1,%0\t\t// %0 := SBC(%1)" + [(set_attr "type" "picoAlu") + (set_attr "length" "2")]) + +; Bit reversal. +(define_insn "brev" + [(set (match_operand:HI 0 "register_operand" "=r") + (unspec:HI [(match_operand:HI 1 "register_operand" "r")] + UNSPEC_BREV))] + "" + "BREV %1,%0\t\t// %0 := BREV(%1)" + [(set_attr "length" "2") + (set_attr "type" "picoAlu")]) + +; Byte swap. +(define_insn "bswaphi2" + [(set (match_operand:HI 0 "register_operand" "=r") + (bswap:HI (match_operand:HI 1 "register_operand" "r")))] + "" + "BYTESWAP %1,%0\t\t// %0 := ByteSwap(%1)" + [(set_attr "length" "2") + (set_attr "type" "picoAlu")]) + +; Read status word. +(define_insn "copysw" + [(set (match_operand:HI 0 "register_operand" "=r") + (unspec_volatile:HI [(reg:CC CC_REGNUM)] UNSPEC_COPYSW))] + "" + "COPYSW.%# %0\t// %0 := Flags" + [(set_attr "type" "basicAlu") + (set_attr "length" "2")]) + +; Saturating addition. +(define_insn "sataddhi3" + [(set (match_operand:HI 0 "register_operand" "=r") + (unspec:HI [(match_operand:HI 1 "register_operand" "r") + (match_operand:HI 2 "register_operand" "r")] + UNSPEC_ADDS)) + (clobber (reg:CC CC_REGNUM))] + "" + "ADDS %1,%2,%0\t// %0 := sat(%1 + %2)" + [(set_attr "type" "picoAlu") + (set_attr "length" "3")]) + +; Saturating subtraction. +(define_insn "satsubhi3" + [(set (match_operand:HI 0 "register_operand" "=r") + (unspec:HI [(match_operand:HI 1 "register_operand" "r") + (match_operand:HI 2 "register_operand" "r")] + UNSPEC_SUBS)) + (clobber (reg:CC CC_REGNUM))] + "" + "SUBS %1,%2,%0\t// %0 := sat(%1 - %2)" + [(set_attr "type" "picoAlu") + (set_attr "length" "3")]) + +(define_insn "halt" + [(unspec_volatile [(match_operand:HI 0 "const_int_operand" "i")] + UNSPEC_HALT)] + "" + "HALT\t// (id %0)" + [(set_attr "length" "1") + (set_attr "type" "unknown")]) + +(define_insn "profile" + [(unspec_volatile [(match_operand:HI 0 "const_int_operand" "i")] + UNSPEC_INTERNAL_PROFILE)] + "" + "PROFILE_DUMMY %0 \t// (profile instruction %0)" + [(set_attr "length" "1") + (set_attr "type" "unknown")]) + +(define_insn "internal_testport" + [(set (reg:CC CC_REGNUM) + (unspec_volatile:CC [(match_operand:HI 0 "const_int_operand" "i")] + UNSPEC_INTERNAL_TESTPORT))] + "" + "TSTPORT %0" + [(set_attr "length" "2") + (set_attr "longConstant" "false") + (set_attr "type" "picoAlu")]) + +;;============================================================================ +;; Communications builtins. +;; +;; Each builtin comes in two forms: a single port version, which maps +;; to a single instruction, and an array port version. The array port +;; version is treated as a special type of instruction, which is then +;; split into a number of smaller instructions, if the index of the +;; port can't be converted into a constant. When the RTL split is +;; performed, a function call is emitted, in which the index of the +;; port to use is used to compute the address of the function to call +;; (i.e., each array port is a function in its own right, and the +;; functions are stored as an array which is then indexed to determine +;; the correct function). The communication function port array is +;; created by the linker if and only if it is required (in a +;; collect2-like manner). +;;============================================================================ + +; Simple scalar get. +(define_insn "commsGet" + [(set (match_operand:SI 0 "register_operand" "=r") + (unspec_volatile:SI + [(match_operand:HI 1 "immediate_operand" "n")] + UNSPEC_GET))] + "" + "GET %1,%R0\t// %R0 := PORT(%1)" + [(set_attr "type" "comms") + (set_attr "length" "2")]) + +; Entry point for array get (the actual port index is computed as the +; sum of the index, and the base). +; +; op0 - Destination +; op1 - Requested port index +; op2 - size of port array (constant) +; op3 - base index of port array (constant) + +(define_expand "commsArrayGet" + [(parallel + [(set (reg:SI 0) + (unspec_volatile:SI [(match_operand:HI 1 "general_operand" "") + (match_operand:HI 2 "immediate_operand" "") + (match_operand:HI 3 "immediate_operand" "")] + UNSPEC_CALL_GET_ARRAY)) + (clobber (reg:HI LINK_REGNUM))]) + (set (match_operand:SI 0 "register_operand" "") (reg:SI 0))] + "" + "") + +;; The actual array get instruction. When the array index is a constant, +;; an exact instruction may be generated. When the index is variable, +;; a call to a special function is generated. This code could be +;; split into individual RTL instructions, but it is so rarely +;; used, that we won't bother. +(define_insn "*commsArrayGetInstruction" + [(set (reg:SI 0) + (unspec_volatile:SI [(match_operand:HI 0 "general_operand" "r,i") + (match_operand:HI 1 "immediate_operand" "") + (match_operand:HI 2 "immediate_operand" "")] + UNSPEC_CALL_GET_ARRAY)) + (clobber (reg:HI LINK_REGNUM))] + "" +{ + return picochip_output_get_array (which_alternative, operands); +}) + +; Scalar Put instruction. +(define_insn "commsPut" + [(unspec_volatile [(match_operand:HI 0 "const_int_operand" "") + (match_operand:SI 1 "register_operand" "r")] + UNSPEC_PUT)] + "" + "PUT %R1,%0\t// PORT(%0) := %R1" + [(set_attr "type" "comms") + (set_attr "length" "2")]) + +; Entry point for array put. The operands accepted are: +; op0 - Value to put +; op1 - Requested port index +; op2 - size of port array +; op3 - base index of port array +; The arguments are marshalled into the fixed registers, so that +; the actual put instruction can expand into a call if necessary +; (e.g., if the index is variable at run-time). + +(define_expand "commsArrayPut" + [(set (reg:SI 0) (match_operand:SI 0 "general_operand" "")) + (parallel + [(unspec_volatile [(match_operand:HI 1 "general_operand" "") + (match_operand:HI 2 "immediate_operand" "") + (match_operand:HI 3 "immediate_operand" "")] + UNSPEC_CALL_PUT_ARRAY) + (use (reg:SI 0)) + (clobber (reg:HI LINK_REGNUM))])] + "" + "") + +;; The actual array put instruction. When the array index is a constant, +;; an exact instruction may be generated. When the index is variable, +;; a call to a special function is generated. This code could be +;; split into individual RTL instructions, but it is so rarely +;; used, that we won't bother. +(define_insn "*commsArrayPutInstruction" + [(unspec_volatile [(match_operand:HI 0 "general_operand" "r,i") + (match_operand:HI 1 "immediate_operand" "") + (match_operand:HI 2 "immediate_operand" "")] + UNSPEC_CALL_PUT_ARRAY) + (use (reg:SI 0)) + (clobber (reg:HI LINK_REGNUM))] + "" +{ + return picochip_output_put_array (which_alternative, operands); +}) + +;; Scalar test port instruction. +(define_insn "commsTestPort" + [(set (match_operand:HI 0 "register_operand" "=r") + (unspec_volatile:HI [(match_operand:HI 1 "const_int_operand" "")] + UNSPEC_TESTPORT)) + (clobber (reg:CC CC_REGNUM))] + "" + "// %0 := TestPort(%1)\;TSTPORT %1\;COPYSW.0 %0\;AND.0 %0,8,%0" + [(set_attr "length" "9") + (set_attr "type" "picoAlu")]) + +; Entry point for array tstport (the actual port index is computed as the +; sum of the index, and the base). +; +; op0 - Test value. +; op1 - Requested port index +; op2 - size of port array (constant) +; op3 - base index of port array (constant) + +(define_expand "commsArrayTestPort" + [(parallel + [(set (match_operand:HI 0 "register_operand" "") + (unspec_volatile:HI [(match_operand:HI 1 "general_operand" "") + (match_operand:HI 2 "immediate_operand" "") + (match_operand:HI 3 "immediate_operand" "")] + UNSPEC_CALL_TESTPORT_ARRAY)) + (clobber (reg:HI LINK_REGNUM))])] + "" + "") + +;; The actual array testport instruction. When the array index is a constant, +;; an exact instruction may be generated. When the index is variable, +;; a call to a special function is generated. This code could be +;; split into individual RTL instructions, but it is so rarely +;; used, that we won't bother. +(define_insn "*commsArrayTestportInstruction" + [(set (match_operand:HI 0 "register_operand" "=r,r") + (unspec_volatile:HI [(match_operand:HI 1 "general_operand" "r,i") + (match_operand:HI 2 "immediate_operand" "") + (match_operand:HI 3 "immediate_operand" "")] + UNSPEC_CALL_TESTPORT_ARRAY)) + (clobber (reg:HI LINK_REGNUM))] + "" +{ + return picochip_output_testport_array (which_alternative, operands); +}) + +;; Merge a TSTPORT instruction with the branch to which it +;; relates. Often the TSTPORT function (generated by a built-in), is +;; used to control conditional execution. The normal sequence of +;; instructions would be: +;; TSTPORT p +;; COPYSW temp +;; AND temp, 0x0008, temp +;; SUB temp,0,discard +;; BEQ label +;; This can be made more efficient by detecting the special case where +;; the result of a TSTPORT is used to branch, to allow the following +;; RTL sequence to be generated instead: +;; TSTPORT p +;; BEQ label +;; A big saving in cycles and bytes! + +(define_insn_and_split "tstport_branch" + [(set (pc) + (if_then_else + (match_operator 0 "comparison_operator" + [(unspec_volatile:HI + [(match_operand:HI 1 "const_int_operand" "")] + UNSPEC_TESTPORT) + (const_int 0)]) + (label_ref (match_operand 2 "" "")) + (pc))) + (clobber (reg:CC CC_REGNUM))] + "" + "#" + "" + [(set (reg:CC CC_REGNUM) + (unspec_volatile:CC [(match_dup 1)] UNSPEC_INTERNAL_TESTPORT)) + (parallel [(set (pc) + (if_then_else + (match_op_dup:HI 4 [(reg:CC CC_REGNUM) (const_int 0)]) + (label_ref (match_dup 2)) + (pc))) + (use (match_dup 3))])] + "{ + /* Note that the sense of the branch is reversed, since we are + * comparing flag != 0. */ + gcc_assert (GET_CODE(operands[0]) == NE || GET_CODE(operands[0]) == EQ); + operands[4] = gen_rtx_fmt_ee(reverse_condition(GET_CODE(operands[0])), + GET_MODE(operands[0]), XEXP(operands[0], 0), XEXP(operands[0], 1)); + operands[3] = GEN_INT (0); + }") + +;;============================================================================ +;; Epilogue/Epilogue expansion. +;;============================================================================ + +(define_expand "prologue" + [(clobber (const_int 0))] + "" +{ + picochip_expand_prologue (); + DONE; +}) + +(define_expand "epilogue" + [(use (const_int 0))] + "" +{ + picochip_expand_epilogue (FALSE); + DONE; +}) + +;;============================================================================ +;; Trap instruction. This is used to indicate an error. For the +;; picoChip processors this is handled by calling a HALT instruction, +;; which stops the processor. +;;============================================================================ + +(define_insn "trap" + [(trap_if (const_int 1) (const_int 6))] + "" + "HALT\t// (Trap)" + [(set_attr "length" "2")]) + +;;============================================================================ +;; Conditional copy instructions. Only equal/not-equal comparisons are +;; supported. All other types of comparison remain as branch +;; sequences. +;;============================================================================ + +;; Define expand seems to consider the resulting two instructions to be +;; independent. It was moving the actual copy instruction further down +;; with a call instruction in between. The call was clobbering the CC +;; and hence the cond_copy was wrong. With a split, it works correctly. +(define_expand "movhicc" + [(set (reg:CC CC_REGNUM) (match_operand 1 "comparison_operator" "")) + (parallel [(set (match_operand:HI 0 "register_operand" "=r,r") + (if_then_else:HI (match_op_dup:HI 1 [(reg:CC CC_REGNUM) (const_int 0)]) + (match_operand:HI 2 "picochip_register_or_immediate_operand" "0,0") + (match_operand:HI 3 "picochip_register_or_immediate_operand" "r,i"))) + (use (match_dup 4))])] + "" + {if (!picochip_check_conditional_copy (operands)) + FAIL; + operands[4] = GEN_INT(GET_CODE(operands[1])); + }) + +;; We dont do any checks here. But this pattern is used only when movhicc +;; was checked. Put a "use" clause to make sure. +(define_insn "*conditional_copy" + [(set (match_operand:HI 0 "register_operand" "=r,r") + (if_then_else:HI + (match_operator:HI 4 "picochip_peephole_comparison_operator" + [(reg:CC CC_REGNUM) (const_int 0)]) + (match_operand:HI 1 "picochip_register_or_immediate_operand" "0,0") + (match_operand:HI 2 "picochip_register_or_immediate_operand" "r,i"))) + (use (match_operand:HI 3 "const_int_operand" ""))] + "" +{ + + gcc_assert (GET_CODE(operands[4]) == EQ || GET_CODE(operands[4]) == NE); + /* Note that the comparison is reversed as the pattern matches + the *else* part of the if_then_else */ + switch (GET_CODE(operands[4])) + { + case EQ: return "COPYNE %2,%0\t// if (NE) %0 := %2"; + case NE: return "COPYEQ %2,%0\t// if (EQ) %0 := %2"; + default: + gcc_unreachable(); + } +} + [(set_attr "length" "2") + (set_attr "type" "picoAlu,picoAlu") + (set_attr "longConstant" "false,true")]) + +;; cmphi - This needs to be defined, to ensure that the conditional +;; move works properly (because the if-cvt code uses this pattern to +;; build the conditional move, even though normally we use cbranch to +;; directly generate the instructions). + +(define_expand "cmphi" + [(match_operand:HI 0 "general_operand" "g") + (match_operand:HI 1 "general_operand" "g")] + "" + "DONE;") + +;;============================================================================ +;; Branch patterns - needed for conditional moves. This is because +;; they result in the bcc_gen_fctn array being initialised with the +;; code to define_expand the following, and this in turn means that +;; when noce_emit_cmove is called, the correct pattern can be +;; generated, based upon the assumed presence of the following. The +;; following are never actually used, because the earlier cbranch +;; patterns take precendence. +;;============================================================================ + +(define_expand "bne" + [(set (pc) + (if_then_else + (ne (reg:CC CC_REGNUM) (const_int 0)) + (label_ref (match_operand 0 "" "")) + (pc)))] + "" + "gcc_unreachable();") + +(define_expand "beq" + [(set (pc) + (if_then_else + (eq (reg:CC CC_REGNUM) (const_int 0)) + (label_ref (match_operand 0 "" "")) + (pc)))] + "" + "gcc_unreachable();") + +(define_expand "blt" + [(set (pc) + (if_then_else + (lt (reg:CC CC_REGNUM) (const_int 0)) + (label_ref (match_operand 0 "" "")) + (pc)))] + "" + "gcc_unreachable();") + +(define_expand "bge" + [(set (pc) + (if_then_else + (ge (reg:CC CC_REGNUM) (const_int 0)) + (label_ref (match_operand 0 "" "")) + (pc)))] + "" + "gcc_unreachable();") + +(define_expand "bgeu" + [(set (pc) + (if_then_else + (geu (reg:CC CC_REGNUM) (const_int 0)) + (label_ref (match_operand 0 "" "")) + (pc)))] + "" + "gcc_unreachable();") + +(define_expand "bltu" + [(set (pc) + (if_then_else + (ltu (reg:CC CC_REGNUM) (const_int 0)) + (label_ref (match_operand 0 "" "")) + (pc)))] + "" + "gcc_unreachable();") + +(define_expand "ble" + [(set (pc) + (if_then_else + (le (reg:CC CC_REGNUM) (const_int 0)) + (label_ref (match_operand 0 "" "")) + (pc)))] + "" + "gcc_unreachable();") + +(define_expand "bgt" + [(set (pc) + (if_then_else + (gt (reg:CC CC_REGNUM) (const_int 0)) + (label_ref (match_operand 0 "" "")) + (pc)))] + "" + "gcc_unreachable();") + +(define_expand "bleu" + [(set (pc) + (if_then_else + (leu (reg:CC CC_REGNUM) (const_int 0)) + (label_ref (match_operand 0 "" "")) + (pc)))] + "" + "gcc_unreachable();") + +(define_expand "bgtu" + [(set (pc) + (if_then_else + (gtu (reg:CC CC_REGNUM) (const_int 0)) + (label_ref (match_operand 0 "" "")) + (pc)))] + "" + "gcc_unreachable();") + +;;============================================================================ +;; Scheduling, including delay slot scheduling. +;;============================================================================ + +(automata_option "v") +(automata_option "ndfa") + +;; Define each VLIW slot as a CPU resource. Note the three flavours of +;; branch. `realBranch' is an actual branch instruction. `macroBranch' +;; is a directive to the assembler, which may expand into multiple +;; instructions. `call' is an actual branch instruction, but one which +;; sets the link register, and hence can't be scheduled alongside +;; other instructions which set the link register. When the DFA +;; scheduler is fixed to prevent it scheduling a JL with an R12 +;; setting register, the call type branches can be replaced by +;; realBranch types instead. + +(define_attr "type" + "picoAlu,basicAlu,nonCcAlu,mem,call,realBranch,macroBranch,mul,mac,app,comms,unknown" + (const_string "unknown")) + +(define_attr "schedType" "none,space,speed" + (const (symbol_ref "picochip_schedule_type"))) + +;; Define whether an instruction uses a long constant. + +(define_attr "longConstant" + "true,false" (const_string "false")) + +;; Define three EU slots. +(define_query_cpu_unit "slot0,slot1,slot2") + +;; Pull in the pipeline descriptions for speed or space scheduling. +(include "dfa_speed.md") +(include "dfa_space.md") + +; Unknown instructions are assumed to take a single cycle, and use all +; slots. This enables them to actually output a sequence of +; instructions without any limitation. For the purposes of +; scheduling, unknown instructions are a pain, and should be removed +; completely. This means that RTL patterns should always be used to +; reduce complex sequences of instructions to individual instructions. +(define_insn_reservation "unknownInsn" 1 + (eq_attr "type" "unknown") + "(slot0+slot1+slot2)") + +; Allow any non-branch instructions to be placed in the branch +; slot. Branch slots are always executed. +(define_delay (eq_attr "type" "realBranch,call") + [(eq_attr "type" "!realBranch,macroBranch,call,unknown") (nil) (nil)]) diff --git a/config/picochip/picochip.opt b/config/picochip/picochip.opt new file mode 100644 index 0000000..0e4bc4e --- /dev/null +++ b/config/picochip/picochip.opt @@ -0,0 +1,48 @@ +; Options for the picoChip port of the compiler. + +; Copyright (C) 2008 Free Software Foundation, Inc. +; +; This file is part of GCC. +; +; GCC is free software; you can redistribute it and/or modify it under +; the terms of the GNU General Public License as published by the Free +; Software Foundation; either version 3, or (at your option) any later +; version. +; +; GCC is distributed in the hope that it will be useful, but WITHOUT ANY +; WARRANTY; without even the implied warranty of MERCHANTABILITY or +; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +; for more details. +; +; You should have received a copy of the GNU General Public License +; along with GCC; see the file COPYING3. If not, see +; . + +mae= +Target RejectNegative Joined Var(picochip_ae_type_string) +Specify which type of AE to target. This option sets the mul-type +and byte-access. + +mmul-type= +Target RejectNegative Undocumented Joined Var(picochip_mul_type_string) +Specify which type of multiplication to use. Can be mem, mac or none. + +mbyte-access +Target Undocumented Var(picochip_has_byte_access,1) Init(1) +Specify whether the byte access instructions should be used. Enabled by default. + +mdebug +Target RejectNegative Undocumented Mask(DEBUG) +Enable debug output to be generated. + +msymbol-as-address +Target Mask(SYMBOL_AS_ADDRESS) +Allow a symbol value to be used as an immediate value in an +instruction. + +minefficient-warnings +Target Mask(INEFFICIENT_WARNINGS) +Generate warnings when inefficient code is known to be generated. + +minefficient +Target Mask(INEFFICIENT_WARNINGS) MaskExists Undocumented diff --git a/config/picochip/predicates.md b/config/picochip/predicates.md new file mode 100644 index 0000000..b69439d --- /dev/null +++ b/config/picochip/predicates.md @@ -0,0 +1,72 @@ +;; GCC machine description for picochip +;; Copyright (C) 2008 Free Software Foundation, Inc. +;; Contributed by picoChip Designs Ltd (http://www.picochip.com) +;; Maintained by Daniel Towner (dant@picochip.com) and Hariharan +;; Sandanagobalane (hariharan@picochip.com) +;; +;; This file is part of GCC. +;; +;; GCC is free software; you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation; either version 3, or (at your option) +;; any later version. +;; +;; GCC is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. +;; +;; You should have received a copy of the GNU General Public License +;; along with GCC; see the file COPYING3. If not, see +;; . + +(define_predicate "picochip_register_or_immediate_operand" + (ior (match_operand 0 "register_operand") + (match_operand 0 "immediate_operand"))) + +(define_predicate "power_of_2_imm_operand" + (match_code "const_int") +{ + if (GET_CODE (op) == CONST_INT) + { + if (exact_log2 (INTVAL (op)) <= 16 && exact_log2 (INTVAL (op)) > 0) + return 1; + } + + return 0; +}) + +;; Limit the comparison operators to a selected subset. +(define_predicate "picochip_supported_comparison_operator" + (and (match_operand 0 "comparison_operator") + (match_code "ne,eq,ge,geu,lt,ltu"))) +(define_predicate "picochip_peephole_comparison_operator" + (and (match_operand 0 "comparison_operator") + (match_code "ne,eq"))) + +;; Allow selected arithmetic operators to apply a shift to their first +;; operands + +(define_predicate "picochip_first_op_shift_operator" + (match_code "and,plus,minus,ior,xor")) + +;; The same as the previous predicate, but only allowing those +;; operators which can accept an immediate. +(define_predicate "picochip_first_op_shift_operator_imm" + (match_code "plus,minus")) + +;; Predicate on a J type integer. +(define_predicate "picochip_J_operand" + (match_operand 0 "immediate_operand") + { + return (CONST_INT == GET_CODE(op) && + picochip_const_ok_for_letter_p (INTVAL(op), 'J')); + }) + +;; Is the operand suitable for use in a compare? + +(define_predicate "picochip_comparison_operand" + (ior (match_operand 0 "register_operand") + (and (match_operand 0 "immediate_operand") + (match_test "picochip_const_ok_for_letter_p(INTVAL(op), 'O')")))) + diff --git a/config/picochip/t-picochip b/config/picochip/t-picochip new file mode 100644 index 0000000..db96a6e --- /dev/null +++ b/config/picochip/t-picochip @@ -0,0 +1,62 @@ +# Compile the extra library functions. + +LIB2FUNCS_EXTRA = \ + $(srcdir)/config/picochip/libgccExtras/ashrsi3.asm \ + $(srcdir)/config/picochip/libgccExtras/ashlsi3.asm \ + $(srcdir)/config/picochip/libgccExtras/divmodhi4.asm \ + $(srcdir)/config/picochip/libgccExtras/udivmodhi4.asm \ + $(srcdir)/config/picochip/libgccExtras/divmodsi4.asm \ + $(srcdir)/config/picochip/libgccExtras/udivmodsi4.asm \ + $(srcdir)/config/picochip/libgccExtras/divmod15.asm \ + $(srcdir)/config/picochip/libgccExtras/ucmpsi2.asm \ + $(srcdir)/config/picochip/libgccExtras/cmpsi2.asm \ + $(srcdir)/config/picochip/libgccExtras/clzsi2.asm \ + $(srcdir)/config/picochip/libgccExtras/adddi3.asm \ + $(srcdir)/config/picochip/libgccExtras/subdi3.asm \ + $(srcdir)/config/picochip/libgccExtras/lshrsi3.asm \ + $(srcdir)/config/picochip/libgccExtras/parityhi2.asm \ + $(srcdir)/config/picochip/libgccExtras/popcounthi2.asm + +# Prevent some of the more complicated libgcc functions from being +# compiled. This is because they are generally too big to fit into an +# AE anyway, so there is no point in having them. Also, some don't +# compile properly so we'll ignore them for the moment. + +LIB1ASMFUNCS = _mulsc3 _divsc3 +LIB1ASMSRC = picochip/libgccExtras/fake_libgcc.asm + +# Turn off the building of exception handling libraries. +LIB2ADDEH = +LIB2ADDEHDEP = + +# Turn off ranlib on target libraries. +RANLIB_FOR_TARGET = cat + +# Special libgcc setup. Make single/double floating point the same, +# and use our own include files. +TARGET_LIBGCC2_CFLAGS = -DDF=SF -I../../includes/ + +# Switch off all debugging for the embedded libraries. +# (embedded processors need small libraries by default). +# NOTE: If the debug level is increased, turn off instruction scheduling. +LIBGCC2_DEBUG_CFLAGS = -g0 + +# Build all combinations of library for different multiply units, and +# presence/absence of byte access. +MULTILIB_OPTIONS = mmul-type=none/mmul-type=mac/mmul-type=mul mno-byte-access/mbyte-access + +# Using a mul unit (currently) implies that byte access is available. +MULTILIB_EXCEPTIONS = mmul-type=mul/mno-byte-access + +# We want fine grained libraries, so use the new code +# to build the floating point emulation libraries. +FPBIT = fp-bit.c + +# Software floating point support. Floating point is not properly +# supported, but is existence can be useful for some types of testing. +fp-bit.c: $(srcdir)/config/fp-bit.c + echo '#define FLOAT' > fp-bit.c + echo '#define FLOAT_ONLY' >> fp-bit.c + echo '#define SMALL_MACHINE' >> fp-bit.c + cat $(srcdir)/config/fp-bit.c >> fp-bit.c + -- cgit v1.1