diff options
| -rw-r--r-- | sim/pru/pru.isa | 12 | ||||
| -rw-r--r-- | sim/testsuite/pru/carry.s | 416 |
2 files changed, 424 insertions, 4 deletions
diff --git a/sim/pru/pru.isa b/sim/pru/pru.isa index fb2d049..e88522b 100644 --- a/sim/pru/pru.isa +++ b/sim/pru/pru.isa @@ -40,26 +40,30 @@ INSTRUCTION (sub, OP2 = (IO ? IMM8 : RS2); RD = RS1 - OP2; CARRY = (((uint64_t) RS1 - (uint64_t) OP2) >> RD_WIDTH) & 1; + CARRY = !CARRY; PC++) INSTRUCTION (suc, OP2 = (IO ? IMM8 : RS2); - RD = RS1 - OP2 - CARRY; - CARRY = (((uint64_t) RS1 - (uint64_t) OP2 - (uint64_t) CARRY) + RD = RS1 - OP2 - !CARRY; + CARRY = (((uint64_t) RS1 - (uint64_t) OP2 - (uint64_t) !CARRY) >> RD_WIDTH) & 1; + CARRY = !CARRY; PC++) INSTRUCTION (rsb, OP2 = (IO ? IMM8 : RS2); RD = OP2 - RS1; CARRY = (((uint64_t) OP2 - (uint64_t) RS1) >> RD_WIDTH) & 1; + CARRY = !CARRY; PC++) INSTRUCTION (rsc, OP2 = (IO ? IMM8 : RS2); - RD = OP2 - RS1 - CARRY; - CARRY = (((uint64_t) OP2 - (uint64_t) RS1 - (uint64_t) CARRY) + RD = OP2 - RS1 - !CARRY; + CARRY = (((uint64_t) OP2 - (uint64_t) RS1 - (uint64_t) !CARRY) >> RD_WIDTH) & 1; + CARRY = !CARRY; PC++) INSTRUCTION (lsl, diff --git a/sim/testsuite/pru/carry.s b/sim/testsuite/pru/carry.s new file mode 100644 index 0000000..cff75d2 --- /dev/null +++ b/sim/testsuite/pru/carry.s @@ -0,0 +1,416 @@ +# Check that carry for addition and subtraction works. +# mach: pru + +# Copyright (C) 2023 Free Software Foundation, Inc. +# Contributed by Dimitar Dimitrov <dimitar@dinux.eu> +# +# This file is part of the GNU simulators. +# +# This program 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 of the License, or +# (at your option) any later version. +# +# This program 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. If not, see <http://www.gnu.org/licenses/>. + +.include "testutils.inc" + + # Helper macro to exercise three consecutive + # instructions using the carry bit. + .macro test_seq srcmode, dstmode, init0, init1, init2, init3, alu0, alu1, alu2, expected + # In case srcmode>dstmode, "garbage" in the r20 MSB + # bits could falsely be interpreted as carry. + # So start with initialized destination to make tests consistent. + ldi r20, 0 + ldi32 r15, \init0 + ldi32 r16, \init1 + ldi32 r17, \init2 + ldi32 r18, \init3 + ldi32 r0, \expected + \alu0 r20\dstmode, r15\srcmode, r16\srcmode + \alu1 r20\dstmode, r20\srcmode, r17\srcmode + \alu2 r20\dstmode, r20\srcmode, r18\srcmode + qbeq 1f, r0, r20\dstmode + jmp EXIT_FAIL +1: + .endm + + # Helper macro to verify one ALU instruction + # using the carry bit. + .macro test1 alu, dstmode, src0mode, src0init, src1mode, src1init, expected + ldi32 r15, \src0init + ldi32 r16, \src1init + ldi32 r0, \expected + \alu r20\dstmode, r15\src0mode, r16\src1mode + qbeq 1f, r0, r20\dstmode + jmp EXIT_FAIL +1: + .endm + + start + + # ***** ADD 32-bit dst, 32-bit src ***** + # {add, clear carry} + test1 add, " ", " ", 0x00000000, " ", 0x00000000, 0x00000000 + # {add with carry=0, clear carry} + test1 adc, " ", " ", 0x00000000, " ", 0x00000000, 0x00000000 + # {add with carry=0, set carry} + test1 adc, " ", " ", 0x00000001, " ", 0xffffffff, 0x00000000 + # {add with carry=1, set carry} + test1 adc, " ", " ", 0x00000010, " ", 0xfffffffe, 0x0000000f + # {add with carry=1, clear carry} + test1 adc, " ", " ", 0x00000010, " ", 0x0ffffffe, 0x1000000f + # {add with carry=0, set carry} + test1 adc, " ", " ", 0x00000001, " ", 0xffffffff, 0x00000000 + # {add, set carry} + test1 add, " ", " ", 0x00000001, " ", 0xffffffff, 0x00000000 + # {add with carry=1, set carry} + test1 adc, " ", " ", 0x00000010, " ", 0xfffffffe, 0x0000000f + + # ***** ADD 32-bit dst, 16-bit src ***** + test1 add, " ", ".w0", 0x00000000, ".w0", 0x00000000, 0x00000000 + test1 adc, " ", ".w0", 0x00000000, ".w0", 0x00000000, 0x00000000 + test1 adc, " ", ".w0", 0x00000003, ".w0", 0xffffffff, 0x00010002 + test1 adc, " ", ".w0", 0x00000010, ".w0", 0x0000fffe, 0x0001000e + + # ***** ADD 32-bit dst, 8-bit src ***** + test1 add, " ", ".b0", 0x00000000, ".b0", 0x00000000, 0x00000000 + test1 adc, " ", ".b0", 0x00000000, ".b0", 0x00000000, 0x00000000 + test1 adc, " ", ".b0", 0x00000003, ".b0", 0xffffffff, 0x00000102 + test1 adc, " ", ".b0", 0x00000010, ".b0", 0x0000f0fe, 0x0000010e + + # ***** ADD 16-bit dst, 32-bit src ***** + test1 add, ".w0", " ", 0x00000000, " ", 0x00000000, 0x00000000 + test1 adc, ".w0", " ", 0x00000000, " ", 0x00000000, 0x00000000 + test1 adc, ".w0", " ", 0x00000001, " ", 0xfff0ffff, 0x00000000 + test1 adc, ".w0", " ", 0x00000010, " ", 0x0000fffe, 0x0000000f + test1 adc, ".w0", " ", 0x00000010, " ", 0x00000ffe, 0x0000100f + test1 adc, ".w0", " ", 0x00000001, " ", 0x0000ffff, 0x00000000 + test1 add, ".w0", " ", 0x00000001, " ", 0x0000ffff, 0x00000000 + test1 adc, ".w0", " ", 0x00000010, " ", 0x0000fffe, 0x0000000f + # Test when intermediate sum sets the carry. + test1 add, ".w0", " ", 0x00010000, " ", 0x00000000, 0x00000000 + test1 adc, ".w0", " ", 0x00000000, " ", 0x00000000, 0x00000001 + test1 add, ".w0", " ", 0x00020000, " ", 0x00000000, 0x00000000 + test1 adc, ".w0", " ", 0x00000000, " ", 0x00000000, 0x00000000 + + # ***** ADD 16-bit dst, 16-bit src ***** + test1 add, ".w0", ".w0", 0x00000210, ".w0", 0x00000130, 0x00000340 + test1 adc, ".w0", ".w0", 0x00000000, ".w0", 0x00000000, 0x00000000 + test1 adc, ".w0", ".w0", 0x00000001, ".w0", 0xffffffff, 0x00000000 + test1 adc, ".w0", ".w0", 0x00000010, ".w0", 0xfffffffe, 0x0000000f + test1 adc, ".w0", ".w0", 0x00000010, ".w0", 0x00000ffe, 0x0000100f + test1 adc, ".w0", ".w0", 0x00000001, ".w0", 0xfff0ffff, 0x00000000 + test1 add, ".w0", ".w0", 0x00000001, ".w0", 0xfff0ffff, 0x00000000 + test1 adc, ".w0", ".w0", 0x00000010, ".w0", 0xfff1fffe, 0x0000000f + + # ***** ADD 16-bit dst, 8-bit src ***** + test1 add, ".w0", ".b0", 0x00000000, ".b0", 0x00000000, 0x00000000 + test1 adc, ".w0", ".b0", 0x00000000, ".b0", 0x00000000, 0x00000000 + test1 adc, ".w0", ".b0", 0x00000003, ".b0", 0xffffffff, 0x00000102 + test1 adc, ".w0", ".b0", 0x00000010, ".b0", 0x0000f0fe, 0x0000010e + + # ***** ADD 8-bit dst, 32-bit src ***** + test1 add, ".b0", " ", 0x00000000, " ", 0x00000000, 0x00000000 + test1 adc, ".b0", " ", 0x00000000, " ", 0x00000000, 0x00000000 + test1 adc, ".b0", " ", 0x00000001, " ", 0x000000ff, 0x00000000 + test1 adc, ".b0", " ", 0x00000010, " ", 0x000000fe, 0x0000000f + test1 adc, ".b0", " ", 0x00000021, " ", 0x0000001e, 0x00000040 + test1 adc, ".b0", " ", 0x00000001, " ", 0x000000ff, 0x00000000 + test1 add, ".b0", " ", 0x00000001, " ", 0x000000ff, 0x00000000 + test1 adc, ".b0", " ", 0x00000010, " ", 0x000000fe, 0x0000000f + # Test when intermediate sum sets the carry. + test1 add, ".b0", " ", 0x10000100, " ", 0x00000000, 0x00000000 + test1 adc, ".b0", " ", 0x00000000, " ", 0x00000000, 0x00000001 + + # ***** ADD 8-bit dst, 16-bit src ***** + test1 add, ".b0", ".w0", 0x10000000, ".w0", 0x00000000, 0x00000000 + test1 adc, ".b0", ".w0", 0x02000000, ".w0", 0x00000000, 0x00000000 + test1 adc, ".b0", ".w0", 0x00030001, ".w0", 0x000000ff, 0x00000000 + test1 adc, ".b0", ".w0", 0x00004010, ".w0", 0x000000fe, 0x0000000f + test1 adc, ".b0", ".w0", 0x00000021, ".w0", 0x0000001e, 0x00000040 + test1 adc, ".b0", ".w0", 0x00000001, ".w0", 0x000000ff, 0x00000000 + test1 add, ".b0", ".w0", 0x00000001, ".w0", 0x000000ff, 0x00000000 + test1 adc, ".b0", ".w0", 0x00000010, ".w0", 0x000000fe, 0x0000000f + # Test when intermediate sum sets the carry. + test1 add, ".b0", ".w0", 0x10003100, ".w0", 0x00000000, 0x00000000 + test1 adc, ".b0", ".w0", 0x00000000, ".w0", 0x00000000, 0x00000001 + + # ***** ADD 8-bit dst, 8-bit src ***** + test1 add, ".b0", ".b0", 0x00000210, ".b0", 0x00000130, 0x00000040 + test1 adc, ".b0", ".b0", 0x00000000, ".b0", 0x00000000, 0x00000000 + test1 adc, ".b0", ".b0", 0x00000001, ".b0", 0xffffffff, 0x00000000 + test1 adc, ".b0", ".b0", 0x00000010, ".b0", 0xfffffffe, 0x0000000f + test1 adc, ".b0", ".b0", 0x00000010, ".b0", 0x0000000e, 0x0000001f + test1 adc, ".b0", ".b0", 0x00000001, ".b0", 0xfff0ffff, 0x00000000 + test1 add, ".b0", ".b0", 0x00000001, ".b0", 0xfff0ffff, 0x00000000 + test1 adc, ".b0", ".b0", 0x00000010, ".b0", 0xfff1fffe, 0x0000000f + + # ***** SUB 32-bit dst, 32-bit src ***** + # {sub, clear borrow} + test1 sub, " ", " ", 0x00000000, " ", 0x00000000, 0x00000000 + # {sub with borrow=0, clear borrow} + test1 suc, " ", " ", 0x00000010, " ", 0x00000001, 0x0000000f + # {sub with borrow=0, set borrow} + test1 suc, " ", " ", 0x00000008, " ", 0x00000009, 0xffffffff + # {sub with borrow=1, set borrow} + test1 suc, " ", " ", 0x00000008, " ", 0x00000009, 0xfffffffe + # {sub with borrow=1, clear borrow} + test1 suc, " ", " ", 0x00000008, " ", 0x00000001, 0x00000006 + # {sub with borrow=0, set borrow} + test1 suc, " ", " ", 0x80000000, " ", 0x90000000, 0xf0000000 + # {sub, set borrow} + test1 sub, " ", " ", 0x00000000, " ", 0x00000001, 0xffffffff + # {sub with borrow=1, set borrow} + test1 suc, " ", " ", 0x80000000, " ", 0x90000000, 0xefffffff + + # ***** SUB 32-bit dst, 16-bit src ***** + test1 sub, " ", ".w0", 0x00000000, ".w0", 0x00000000, 0x00000000 + test1 suc, " ", ".w0", 0x00000010, ".w0", 0x00000001, 0x0000000f + test1 suc, " ", ".w0", 0x00000008, ".w0", 0x00000009, 0xffffffff + test1 suc, " ", ".w0", 0x00000008, ".w0", 0x00000009, 0xfffffffe + test1 suc, " ", ".w0", 0x00000008, ".w0", 0x00000001, 0x00000006 + test1 suc, " ", ".w0", 0x00108000, ".w0", 0x00009000, 0xfffff000 + test1 sub, " ", ".w0", 0x00000000, ".w0", 0x00000001, 0xffffffff + test1 suc, " ", ".w0", 0x00008000, ".w0", 0x00009000, 0xffffefff + + # ***** SUB 32-bit dst, 8-bit src ***** + test1 sub, " ", ".b0", 0x00000000, ".b0", 0x00000000, 0x00000000 + test1 suc, " ", ".b0", 0x00000010, ".b0", 0x00000001, 0x0000000f + test1 suc, " ", ".b0", 0x00000008, ".b0", 0x00000009, 0xffffffff + test1 suc, " ", ".b0", 0x00000008, ".b0", 0x00000009, 0xfffffffe + test1 suc, " ", ".b0", 0x00000008, ".b0", 0x00000001, 0x00000006 + test1 suc, " ", ".b0", 0x00108080, ".b0", 0x00009090, 0xfffffff0 + test1 sub, " ", ".b0", 0x00000000, ".b0", 0x00000001, 0xffffffff + test1 suc, " ", ".b0", 0x00008080, ".b0", 0x00009090, 0xffffffef + + # ***** SUB 16-bit dst, 32-bit src ***** + test1 sub, ".w0", " ", 0x00000000, " ", 0x00000000, 0x00000000 + test1 suc, ".w0", " ", 0x00000010, " ", 0x00000001, 0x0000000f + test1 suc, ".w0", " ", 0x00000008, " ", 0x00000009, 0x0000ffff + test1 suc, ".w0", " ", 0x00000008, " ", 0x00000009, 0x0000fffe + test1 suc, ".w0", " ", 0x00000008, " ", 0x00000001, 0x00000006 + test1 suc, ".w0", " ", 0x00108000, " ", 0x00009000, 0x0000f000 + test1 sub, ".w0", " ", 0x00000000, " ", 0x00000001, 0x0000ffff + test1 suc, ".w0", " ", 0x00008000, " ", 0x00009000, 0x0000efff + # Test when intermediate value sets the borrow. + test1 sub, ".w0", " ", 0x00010000, " ", 0x00000000, 0x00000000 + test1 suc, ".w0", " ", 0x00000002, " ", 0x00000000, 0x00000001 + + # ***** SUB 16-bit dst, 16-bit src ***** + test1 sub, ".w0", ".w0", 0x00000000, ".w0", 0x00000000, 0x00000000 + test1 suc, ".w0", ".w0", 0x00000010, ".w0", 0x00000001, 0x0000000f + test1 suc, ".w0", ".w0", 0x00000008, ".w0", 0x00000009, 0x0000ffff + test1 suc, ".w0", ".w0", 0x00000008, ".w0", 0x00000009, 0x0000fffe + test1 suc, ".w0", ".w0", 0x00000008, ".w0", 0x00000001, 0x00000006 + test1 suc, ".w0", ".w0", 0x00108000, ".w0", 0x00009000, 0x0000f000 + test1 sub, ".w0", ".w0", 0x00000000, ".w0", 0x00000001, 0x0000ffff + test1 suc, ".w0", ".w0", 0x00008000, ".w0", 0x00009000, 0x0000efff + + # ***** SUB 16-bit dst, 8-bit src ***** + test1 sub, ".w0", ".b0", 0x00000000, ".b0", 0x00000000, 0x00000000 + test1 suc, ".w0", ".b0", 0x00000010, ".b0", 0x00000001, 0x0000000f + test1 suc, ".w0", ".b0", 0x00000008, ".b0", 0x00000009, 0x0000ffff + test1 suc, ".w0", ".b0", 0x00000008, ".b0", 0x00000009, 0x0000fffe + test1 suc, ".w0", ".b0", 0x00000008, ".b0", 0x00000001, 0x00000006 + test1 suc, ".w0", ".b0", 0x00108080, ".b0", 0x00009090, 0x0000fff0 + test1 sub, ".w0", ".b0", 0x00000000, ".b0", 0x00000001, 0x0000ffff + test1 suc, ".w0", ".b0", 0x0000a080, ".b0", 0x0000c090, 0x0000ffef + + # ***** SUB 8-bit dst, 32-bit src ***** + test1 sub, ".b0", " ", 0x00000000, " ", 0x00000000, 0x00000000 + test1 suc, ".b0", " ", 0x00000010, " ", 0x00000001, 0x0000000f + test1 suc, ".b0", " ", 0x00000008, " ", 0x00000009, 0x000000ff + test1 suc, ".b0", " ", 0x00000008, " ", 0x00000009, 0x000000fe + test1 suc, ".b0", " ", 0x00000008, " ", 0x00000001, 0x00000006 + test1 suc, ".b0", " ", 0x00000080, " ", 0x00000090, 0x000000f0 + test1 sub, ".b0", " ", 0x00000000, " ", 0x00000001, 0x000000ff + test1 suc, ".b0", " ", 0x00000080, " ", 0x00000090, 0x000000ef + # Test when intermediate value sets the borrow. + test1 sub, ".b0", " ", 0x00000100, " ", 0x00000000, 0x00000000 + test1 suc, ".b0", " ", 0x00000002, " ", 0x00000000, 0x00000001 + test1 sub, ".b0", " ", 0x00000100, " ", 0x00000000, 0x00000000 + test1 rsc, ".b0", " ", 0x00000000, " ", 0x00000002, 0x00000001 + + # ***** SUB 8-bit dst, 16-bit src ***** + test1 sub, ".b0", ".w0", 0x00000000, ".w0", 0x00000000, 0x00000000 + test1 suc, ".b0", ".w0", 0x00000010, ".w0", 0x00000001, 0x0000000f + test1 suc, ".b0", ".w0", 0x00000008, ".w0", 0x00000009, 0x000000ff + test1 suc, ".b0", ".w0", 0x00000008, ".w0", 0x00000009, 0x000000fe + test1 suc, ".b0", ".w0", 0x00000008, ".w0", 0x00000001, 0x00000006 + test1 suc, ".b0", ".w0", 0x00000080, ".w0", 0x00000090, 0x000000f0 + test1 sub, ".b0", ".w0", 0x00000000, ".w0", 0x00000001, 0x000000ff + test1 suc, ".b0", ".w0", 0x00000080, ".w0", 0x00000090, 0x000000ef + # Test when intermediate value sets the borrow. + test1 sub, ".b0", ".w0", 0x00000100, ".w0", 0x00000000, 0x00000000 + test1 suc, ".b0", ".w0", 0x00000002, ".w0", 0x00000000, 0x00000001 + test1 sub, ".b0", ".w0", 0x00000100, ".w0", 0x00000000, 0x00000000 + test1 rsc, ".b0", ".w0", 0x00000000, ".w0", 0x00000002, 0x00000001 + + # ***** SUB 8-bit dst, 8-bit src ***** + test1 sub, ".b0", ".w0", 0x00000000, ".w0", 0x00000000, 0x00000000 + test1 suc, ".b0", ".w0", 0x00000010, ".w0", 0x00000001, 0x0000000f + test1 suc, ".b0", ".w0", 0x00000008, ".w0", 0x00000009, 0x000000ff + test1 suc, ".b0", ".w0", 0x00000008, ".w0", 0x00000009, 0x000000fe + test1 suc, ".b0", ".w0", 0x00000008, ".w0", 0x00000001, 0x00000006 + test1 suc, ".b0", ".w0", 0x00000080, ".w0", 0x00000090, 0x000000f0 + test1 sub, ".b0", ".w0", 0x00000000, ".w0", 0x00000001, 0x000000ff + test1 suc, ".b0", ".w0", 0x00000080, ".w0", 0x00000090, 0x000000ef + + # ***** Reverse SUB 32-bit dst, 32-bit src ***** + # {rsb, clear borrow} + test1 rsb, " ", " ", 0x00000000, " ", 0x00000000, 0x00000000 + # {rsb with borrow=0, clear borrow} + test1 rsc, " ", " ", 0x00000001, " ", 0x00000010, 0x0000000f + # {rsb with borrow=0, set borrow} + test1 rsc, " ", " ", 0x00000009, " ", 0x00000008, 0xffffffff + # {rsb with borrow=1, set borrow} + test1 rsc, " ", " ", 0x00000009, " ", 0x00000008, 0xfffffffe + # {rsb with borrow=1, clear borrow} + test1 rsc, " ", " ", 0x00000001, " ", 0x00000008, 0x00000006 + # {rsb with borrow=0, set borrow} + test1 rsc, " ", " ", 0x90000000, " ", 0x80000000, 0xf0000000 + # {rsb, set borrow} + test1 rsb, " ", " ", 0x00000001, " ", 0x00000000, 0xffffffff + # {rsb with borrow=1, set borrow} + test1 rsc, " ", " ", 0x90000000, " ", 0x80000000, 0xefffffff + + # ***** Reverse SUB 32-bit dst, 16-bit src ***** + test1 rsb, " ", ".w0", 0x00000000, ".w0", 0x00000000, 0x00000000 + test1 rsc, " ", ".w0", 0x00000001, ".w0", 0x00000010, 0x0000000f + test1 rsc, " ", ".w0", 0x00000009, ".w0", 0x00000008, 0xffffffff + test1 rsc, " ", ".w0", 0x00000009, ".w0", 0x00000008, 0xfffffffe + test1 rsc, " ", ".w0", 0x00000001, ".w0", 0x00000008, 0x00000006 + test1 rsc, " ", ".w0", 0x00109000, ".w0", 0x00008000, 0xfffff000 + test1 rsb, " ", ".w0", 0x00000001, ".w0", 0x00000000, 0xffffffff + test1 rsc, " ", ".w0", 0x00009000, ".w0", 0x00008000, 0xffffefff + + # ***** Reverse SUB 32-bit dst, 8-bit src ***** + test1 rsb, " ", ".b0", 0x00000000, ".b0", 0x00000000, 0x00000000 + test1 rsc, " ", ".b0", 0x00000001, ".b0", 0x00000010, 0x0000000f + test1 rsc, " ", ".b0", 0x00000009, ".b0", 0x00000008, 0xffffffff + test1 rsc, " ", ".b0", 0x00000009, ".b0", 0x00000008, 0xfffffffe + test1 rsc, " ", ".b0", 0x00000001, ".b0", 0x00000008, 0x00000006 + test1 rsc, " ", ".b0", 0x00108090, ".b0", 0x00009080, 0xfffffff0 + test1 rsb, " ", ".b0", 0x00000001, ".b0", 0x00000000, 0xffffffff + test1 rsc, " ", ".b0", 0x00008090, ".b0", 0x00009080, 0xffffffef + + # ***** Reverse SUB 16-bit dst, 32-bit src ***** + test1 rsb, ".w0", " ", 0x00000000, " ", 0x00000000, 0x00000000 + test1 rsc, ".w0", " ", 0x00000001, " ", 0x00000010, 0x0000000f + test1 rsc, ".w0", " ", 0x00000009, " ", 0x00000008, 0x0000ffff + test1 rsc, ".w0", " ", 0x00000009, " ", 0x00000008, 0x0000fffe + test1 rsc, ".w0", " ", 0x00000001, " ", 0x00000008, 0x00000006 + test1 rsc, ".w0", " ", 0x00109000, " ", 0x00008000, 0x0000f000 + test1 rsb, ".w0", " ", 0x00000001, " ", 0x00000000, 0x0000ffff + test1 rsc, ".w0", " ", 0x00009000, " ", 0x00008000, 0x0000efff + # Test when intermediate value sets the borrow. + test1 rsb, ".w0", " ", 0x00000000, " ", 0x00010000, 0x00000000 + test1 rsc, ".w0", " ", 0x00000000, " ", 0x00000002, 0x00000001 + + # ***** Reverse SUB 16-bit dst, 16-bit src ***** + test1 rsb, ".w0", ".w0", 0x00000000, ".w0", 0x00000000, 0x00000000 + test1 rsc, ".w0", ".w0", 0x00000001, ".w0", 0x00000010, 0x0000000f + test1 rsc, ".w0", ".w0", 0x00000009, ".w0", 0x00000008, 0x0000ffff + test1 rsc, ".w0", ".w0", 0x00000009, ".w0", 0x00000008, 0x0000fffe + test1 rsc, ".w0", ".w0", 0x00000001, ".w0", 0x00000008, 0x00000006 + test1 rsc, ".w0", ".w0", 0x00109000, ".w0", 0x00008000, 0x0000f000 + test1 rsb, ".w0", ".w0", 0x00000001, ".w0", 0x00000000, 0x0000ffff + test1 rsc, ".w0", ".w0", 0x00009000, ".w0", 0x00008000, 0x0000efff + + # ***** Reverse SUB 16-bit dst, 8-bit src ***** + test1 rsb, ".w0", ".b0", 0x00000000, ".b0", 0x00000000, 0x00000000 + test1 rsc, ".w0", ".b0", 0x00000001, ".b0", 0x00000010, 0x0000000f + test1 rsc, ".w0", ".b0", 0x00000009, ".b0", 0x00000008, 0x0000ffff + test1 rsc, ".w0", ".b0", 0x00000009, ".b0", 0x00000008, 0x0000fffe + test1 rsc, ".w0", ".b0", 0x00000001, ".b0", 0x00000008, 0x00000006 + test1 rsc, ".w0", ".b0", 0x00108090, ".b0", 0x00009080, 0x0000fff0 + test1 rsb, ".w0", ".b0", 0x00000001, ".b0", 0x00000000, 0x0000ffff + test1 rsc, ".w0", ".b0", 0x0000a090, ".b0", 0x0000c080, 0x0000ffef + + # ***** Reverse SUB 8-bit dst, 32-bit src ***** + test1 rsb, ".b0", " ", 0x00000000, " ", 0x00000000, 0x00000000 + test1 rsc, ".b0", " ", 0x00000001, " ", 0x00000010, 0x0000000f + test1 rsc, ".b0", " ", 0x00000009, " ", 0x00000008, 0x000000ff + test1 rsc, ".b0", " ", 0x00000009, " ", 0x00000008, 0x000000fe + test1 rsc, ".b0", " ", 0x00000001, " ", 0x00000008, 0x00000006 + test1 rsc, ".b0", " ", 0x00000090, " ", 0x00000080, 0x000000f0 + test1 rsb, ".b0", " ", 0x00000001, " ", 0x00000000, 0x000000ff + test1 rsc, ".b0", " ", 0x00000090, " ", 0x00000080, 0x000000ef + # Test when intermediate value sets the borrow. + test1 rsb, ".b0", " ", 0x00000000, " ", 0x00000100, 0x00000000 + test1 rsc, ".b0", " ", 0x00000000, " ", 0x00000002, 0x00000001 + test1 rsb, ".b0", " ", 0x00000000, " ", 0x00000100, 0x00000000 + test1 suc, ".b0", " ", 0x00000002, " ", 0x00000000, 0x00000001 + + # ***** Reverse SUB 8-bit dst, 16-bit src ***** + test1 rsb, ".b0", ".w0", 0x00000000, ".w0", 0x00000000, 0x00000000 + test1 rsc, ".b0", ".w0", 0x00000001, ".w0", 0x00000010, 0x0000000f + test1 rsc, ".b0", ".w0", 0x00000009, ".w0", 0x00000008, 0x000000ff + test1 rsc, ".b0", ".w0", 0x00000009, ".w0", 0x00000008, 0x000000fe + test1 rsc, ".b0", ".w0", 0x00000001, ".w0", 0x00000008, 0x00000006 + test1 rsc, ".b0", ".w0", 0x00000090, ".w0", 0x00000080, 0x000000f0 + test1 rsb, ".b0", ".w0", 0x00000001, ".w0", 0x00000000, 0x000000ff + test1 rsc, ".b0", ".w0", 0x00000090, ".w0", 0x00000080, 0x000000ef + # Test when intermediate value sets the borrow. + test1 rsb, ".b0", ".w0", 0x00000000, ".w0", 0x00000100, 0x00000000 + test1 rsc, ".b0", ".w0", 0x00000000, ".w0", 0x00000002, 0x00000001 + test1 rsb, ".b0", ".w0", 0x00000000, ".w0", 0x00000100, 0x00000000 + test1 suc, ".b0", ".w0", 0x00000002, ".w0", 0x00000000, 0x00000001 + + # ***** Reverse SUB 8-bit dst, 8-bit src ***** + test1 rsb, ".b0", ".w0", 0x00000000, ".w0", 0x00000000, 0x00000000 + test1 rsc, ".b0", ".w0", 0x00000001, ".w0", 0x00000010, 0x0000000f + test1 rsc, ".b0", ".w0", 0x00000009, ".w0", 0x00000008, 0x000000ff + test1 rsc, ".b0", ".w0", 0x00000009, ".w0", 0x00000008, 0x000000fe + test1 rsc, ".b0", ".w0", 0x00000001, ".w0", 0x00000008, 0x00000006 + test1 rsc, ".b0", ".w0", 0x00000090, ".w0", 0x00000080, 0x000000f0 + test1 rsb, ".b0", ".w0", 0x00000001, ".w0", 0x00000000, 0x000000ff + test1 rsc, ".b0", ".w0", 0x00000090, ".w0", 0x00000080, 0x000000ef + + # ***** Mixed 32-bit ***** + test1 sub, " ", " ", 0x00000000, " ", 0x00000000, 0x00000000 + test1 adc, " ", " ", 0x00000000, " ", 0x00000000, 0x00000001 + test1 suc, " ", " ", 0x00000001, " ", 0x00000001, 0xffffffff + test1 adc, " ", " ", 0x00000001, " ", 0x00000000, 0x00000001 + + test_seq "", "", 0xffffffff, 0x00000001, 0x00000000, 0x00000000 add, suc, add, 0x00000000 + test_seq "", "", 0xffffffff, 0x00000001, 0x00000000, 0x00000000 add, rsc, add, 0x00000000 + test_seq "", "", 0xfffffffe, 0x00000001, 0x00000000, 0x00000000 add, suc, add, 0xfffffffe + test_seq "", "", 0xffffffff, 0x00000001, 0x00000000, 0x00000000 add, suc, adc, 0x00000001 + test_seq "", "", 0xfffffffe, 0x00000001, 0x00000000, 0x00000000 add, suc, adc, 0xffffffff + + test_seq "", "", 0xffffffff, 0x00000010, 0x00000000, 0x00000000 sub, adc, add, 0xfffffff0 + test_seq "", "", 0x0fffffff, 0x00000010, 0x00000000, 0x00000000 sub, adc, add, 0x0ffffff0 + test_seq "", "", 0x00000000, 0x00000010, 0x00000000, 0x00000000 sub, adc, add, 0xfffffff0 + test_seq "", "", 0x00000000, 0x00000010, 0x00000000, 0x00000000 sub, adc, adc, 0xfffffff0 + test_seq "", "", 0x00000000, 0x00000010, 0x00000000, 0x00000000 sub, adc, suc, 0xffffffef + + + # For coverage, also test sequences of ALU instructions + # (i.e. no other instructions in between). + test_seq "", "", 0x00000000, 0x00000000, 0x00000000, 0x00000000 add, adc, adc, 0x00000000 + test_seq "", "", 0x80000000, 0xfffffff0, 0xc0000000, 0x0000001a add, adc, adc, 0x4000000c + test_seq "", ".b0", 0x00000000, 0x00000001, 0x000000ff, 0x00000000 add, adc, adc, 0x00000001 + test_seq "", ".b0", 0x00000000, 0x00000001, 0x000000ff, 0x00000000 add, adc, adc, 0x00000001 + test_seq ".b0", ".b0", 0x00000000, 0x00000001, 0x00000000, 0x0000ffff add, adc, adc, 0x00000000 + test_seq ".b0", ".w0", 0x00000001, 0x00000020, 0x00000400, 0x00008000 add, adc, adc, 0x00000021 + test_seq "", "", 0x00000010, 0x0000000f, 0x00000002, 0x00000020 sub, suc, suc, 0xffffffde + test_seq "", ".b0", 0x00000202, 0x00000000, 0x00000000, 0x00000000 sub, suc, suc, 0x00000002 + test_seq ".w0", ".b0", 0x00000008, 0x00000000, 0x00000000, 0x00000000, sub, suc, suc, 0x00000008 + test_seq ".w0", ".b0", 0x00000008, 0x000000ff, 0x000000ff, 0x000000ff, sub, suc, suc, 0x00000009 + test_seq ".w0", ".b0", 0x00000008, 0x00000fff, 0x00000fff, 0x00000fff, sub, suc, suc, 0x0000000b + test_seq "", "", 0x0000000f, 0x00000010, 0x00000002, 0x00000020 rsb, suc, suc, 0xffffffde + test_seq "", "", 0xffffffff, 0x00000001, 0x00000000, 0x00000000 add, suc, adc, 0x00000001 + test_seq "", "", 0x00000000, 0x00000010, 0x00000000, 0x00000000 sub, adc, adc, 0xfffffff0 + test_seq "", "", 0x00000000, 0x00000010, 0x00000000, 0x00000000 sub, adc, suc, 0xffffffef + + pass +EXIT_FAIL: + fail |