/* Definitions of target machine for TI PRU. Copyright (C) 2014-2021 Free Software Foundation, Inc. Contributed by Dimitar Dimitrov 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 . */ #ifndef GCC_PRU_H #define GCC_PRU_H #include "config/pru/pru-opts.h" /* Define built-in preprocessor macros. */ #define TARGET_CPU_CPP_BUILTINS() \ do \ { \ builtin_define_std ("__PRU__"); \ builtin_define_std ("__pru__"); \ builtin_define_std ("__PRU_V3__"); \ builtin_define_std ("__LITTLE_ENDIAN__"); \ builtin_define_std ("__little_endian__"); \ /* Trampolines are disabled for now. */ \ builtin_define_std ("NO_TRAMPOLINES"); \ } \ while (0) /* TI ABI implementation is not feature-complete enough (e.g. function pointers are not supported), so we cannot list it as a multilib variant. To prevent misuse from users, do not link any of the standard libraries. */ #define DRIVER_SELF_SPECS \ "%{mabi=ti:-nodefaultlibs} " \ "%{mmcu=*:-specs=device-specs/%*%s %= FIRST_ARG_REGNUM \ && (REGNO) <= LAST_ARG_REGNUM ? SIB_REGS \ : (REGNO) == STATIC_CHAIN_REGNUM ? SIB_REGS \ : (REGNO) == LOOPCNTR_REGNUM ? LOOPCNTR_REGS \ : (REGNO) <= LAST_NONIO_GP_REGNUM ? GP_REGS \ : ALL_REGS) #define CLASS_MAX_NREGS(CLASS, MODE) \ ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) /* Arbitrarily set to a non-argument register. Not defined by TI ABI. */ #define STATIC_CHAIN_REGNUM 0 /* r0 */ /* Tests for various kinds of constants used in the PRU port. */ #define SHIFT_INT(X) (IN_RANGE ((X), 0, 31)) #define UHWORD_INT(X) (IN_RANGE ((X), 0, 0xffff)) #define SHWORD_INT(X) (IN_RANGE ((X), -32768, 32767)) #define UBYTE_INT(X) (IN_RANGE ((X), 0, 0xff)) #define SBYTE_INT(X) (IN_RANGE ((X), -128, 127)) /* Say that the epilogue uses the return address register. Note that in the case of sibcalls, the values "used by the epilogue" are considered live at the start of the called function. */ #define EPILOGUE_USES(REGNO) (epilogue_completed \ && (((REGNO) == RA_REGNUM) \ || (REGNO) == (RA_REGNUM + 1))) /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, the stack pointer does not matter. The value is tested only in functions that have frame pointers. No definition is equivalent to always zero. */ #define EXIT_IGNORE_STACK 1 /* Trampolines are not supported, but put a define to keep the build. */ #define TRAMPOLINE_SIZE 4 /* Stack layout. */ #define STACK_GROWS_DOWNWARD 1 #undef FRAME_GROWS_DOWNWARD #define FIRST_PARM_OFFSET(FUNDECL) 0 /* Before the prologue, RA lives in r3.w2. */ #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (HImode, RA_REGNUM) #define RETURN_ADDR_RTX(C,F) pru_get_return_address (C) #define DWARF_FRAME_RETURN_COLUMN RA_REGNUM /* The CFA includes the pretend args. */ #define ARG_POINTER_CFA_OFFSET(FNDECL) \ (gcc_assert ((FNDECL) == current_function_decl), \ FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size) /* Frame/arg pointer elimination settings. */ #define ELIMINABLE_REGS \ {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \ { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}} #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ (OFFSET) = pru_initial_elimination_offset ((FROM), (TO)) #define HARD_REGNO_RENAME_OK(OLD_REG, NEW_REG) \ pru_hard_regno_rename_ok (OLD_REG, NEW_REG) /* Calling convention definitions. */ #if !defined(IN_LIBGCC2) #define NUM_ARG_REGS (LAST_ARG_REGNUM - FIRST_ARG_REGNUM + 1) typedef struct pru_args { bool regs_used[NUM_ARG_REGS]; } CUMULATIVE_ARGS; #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \ do { \ memset ((CUM).regs_used, 0, sizeof ((CUM).regs_used)); \ } while (0) #define FUNCTION_ARG_REGNO_P(REGNO) \ ((REGNO) >= FIRST_ARG_REGNUM && (REGNO) <= LAST_ARG_REGNUM) /* Passing function arguments on stack. */ #define ACCUMULATE_OUTGOING_ARGS 1 /* We define TARGET_RETURN_IN_MEMORY, so set to zero. */ #define DEFAULT_PCC_STRUCT_RETURN 0 /* Profiling. */ #define PROFILE_BEFORE_PROLOGUE #define NO_PROFILE_COUNTERS 1 #define FUNCTION_PROFILER(FILE, LABELNO) \ pru_function_profiler ((FILE), (LABELNO)) #endif /* IN_LIBGCC2 */ /* Addressing modes. */ #define CONSTANT_ADDRESS_P(X) \ (CONSTANT_P (X) && memory_address_p (SImode, X)) #define MAX_REGS_PER_ADDRESS 2 #define BASE_REG_CLASS ALL_REGS #define INDEX_REG_CLASS ALL_REGS #define REGNO_OK_FOR_BASE_P(REGNO) pru_regno_ok_for_base_p ((REGNO), true) #define REGNO_OK_FOR_INDEX_P(REGNO) pru_regno_ok_for_index_p ((REGNO), true) /* Limited by the insns in pru-ldst-multiple.md. */ #define MOVE_MAX 8 #define SLOW_BYTE_ACCESS 1 /* It is as good to call a constant function address as to call an address kept in a register. */ #define NO_FUNCTION_CSE 1 /* Define output assembler language. */ #define ASM_APP_ON "#APP\n" #define ASM_APP_OFF "#NO_APP\n" #define ASM_COMMENT_START "# " #define GLOBAL_ASM_OP "\t.global\t" #define PRU_NAME_R(X) X".b0", X".b1", X".b2", X".b3" #define REGISTER_NAMES \ { \ PRU_NAME_R ("r0"), \ PRU_NAME_R ("r1"), \ PRU_NAME_R ("r2"), \ PRU_NAME_R ("r3"), \ PRU_NAME_R ("r4"), \ PRU_NAME_R ("r5"), \ PRU_NAME_R ("r6"), \ PRU_NAME_R ("r7"), \ PRU_NAME_R ("r8"), \ PRU_NAME_R ("r9"), \ PRU_NAME_R ("r10"), \ PRU_NAME_R ("r11"), \ PRU_NAME_R ("r12"), \ PRU_NAME_R ("r13"), \ PRU_NAME_R ("r14"), \ PRU_NAME_R ("r15"), \ PRU_NAME_R ("r16"), \ PRU_NAME_R ("r17"), \ PRU_NAME_R ("r18"), \ PRU_NAME_R ("r19"), \ PRU_NAME_R ("r20"), \ PRU_NAME_R ("r21"), \ PRU_NAME_R ("r22"), \ PRU_NAME_R ("r23"), \ PRU_NAME_R ("r24"), \ PRU_NAME_R ("r25"), \ PRU_NAME_R ("r26"), \ PRU_NAME_R ("r27"), \ PRU_NAME_R ("r28"), \ PRU_NAME_R ("r29"), \ PRU_NAME_R ("r30"), \ PRU_NAME_R ("r31"), \ PRU_NAME_R ("loopcntr_reg"), \ PRU_NAME_R ("pc"), \ PRU_NAME_R ("fake_fp"), \ PRU_NAME_R ("fake_ap"), \ } #define PRU_OVERLAP_R(X) \ { "r" #X , X * 4 , 4 }, \ { "r" #X ".w0", X * 4 + 0 , 2 }, \ { "r" #X ".w1", X * 4 + 1 , 2 }, \ { "r" #X ".w2", X * 4 + 2 , 2 } #define OVERLAPPING_REGISTER_NAMES \ { \ /* Aliases. */ \ { "sp", 2 * 4, 4 }, \ { "ra", 3 * 4, 2 }, \ { "fp", 4 * 4, 4 }, \ PRU_OVERLAP_R (0), \ PRU_OVERLAP_R (1), \ PRU_OVERLAP_R (2), \ PRU_OVERLAP_R (3), \ PRU_OVERLAP_R (4), \ PRU_OVERLAP_R (5), \ PRU_OVERLAP_R (6), \ PRU_OVERLAP_R (7), \ PRU_OVERLAP_R (8), \ PRU_OVERLAP_R (9), \ PRU_OVERLAP_R (10), \ PRU_OVERLAP_R (11), \ PRU_OVERLAP_R (12), \ PRU_OVERLAP_R (13), \ PRU_OVERLAP_R (14), \ PRU_OVERLAP_R (15), \ PRU_OVERLAP_R (16), \ PRU_OVERLAP_R (17), \ PRU_OVERLAP_R (18), \ PRU_OVERLAP_R (19), \ PRU_OVERLAP_R (20), \ PRU_OVERLAP_R (21), \ PRU_OVERLAP_R (22), \ PRU_OVERLAP_R (23), \ PRU_OVERLAP_R (24), \ PRU_OVERLAP_R (25), \ PRU_OVERLAP_R (26), \ PRU_OVERLAP_R (27), \ PRU_OVERLAP_R (28), \ PRU_OVERLAP_R (29), \ PRU_OVERLAP_R (30), \ PRU_OVERLAP_R (31), \ } #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ do \ { \ fputs (integer_asm_op (POINTER_SIZE / BITS_PER_UNIT, TRUE), FILE); \ fprintf (FILE, "%%pmem(.L%u)\n", (unsigned) (VALUE)); \ } \ while (0) #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \ do \ { \ fputs (integer_asm_op (POINTER_SIZE / BITS_PER_UNIT, TRUE), STREAM); \ fprintf (STREAM, "%%pmem(.L%u-.L%u)\n", (unsigned) (VALUE), \ (unsigned) (REL)); \ } \ while (0) /* Section directives. */ /* Output before read-only data. */ #define TEXT_SECTION_ASM_OP "\t.section\t.text" /* Output before writable data. */ #define DATA_SECTION_ASM_OP "\t.section\t.data" /* Output before uninitialized data. */ #define BSS_SECTION_ASM_OP "\t.section\t.bss" #define CTORS_SECTION_ASM_OP "\t.section\t.init_array,\"aw\",%init_array" #define DTORS_SECTION_ASM_OP "\t.section\t.fini_array,\"aw\",%fini_array" #undef INIT_SECTION_ASM_OP #undef FINI_SECTION_ASM_OP #define INIT_ARRAY_SECTION_ASM_OP CTORS_SECTION_ASM_OP #define FINI_ARRAY_SECTION_ASM_OP DTORS_SECTION_ASM_OP /* Since we use .init_array/.fini_array we don't need the markers at the start and end of the ctors/dtors arrays. */ #define CTOR_LIST_BEGIN asm (CTORS_SECTION_ASM_OP) #define CTOR_LIST_END /* empty */ #define DTOR_LIST_BEGIN asm (DTORS_SECTION_ASM_OP) #define DTOR_LIST_END /* empty */ #undef TARGET_ASM_CONSTRUCTOR #define TARGET_ASM_CONSTRUCTOR pru_elf_asm_constructor #undef TARGET_ASM_DESTRUCTOR #define TARGET_ASM_DESTRUCTOR pru_elf_asm_destructor #define ASM_OUTPUT_ALIGN(FILE, LOG) \ do { \ fprintf ((FILE), "%s%d\n", ALIGN_ASM_OP, (LOG)); \ } while (0) #undef ASM_OUTPUT_ALIGNED_COMMON #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \ do \ { \ fprintf ((FILE), "%s", COMMON_ASM_OP); \ assemble_name ((FILE), (NAME)); \ fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED ",%u\n", (SIZE), \ (ALIGN) / BITS_PER_UNIT); \ } \ while (0) /* This says how to output assembler code to declare an uninitialized internal linkage data object. Under SVR4, the linker seems to want the alignment of data objects to depend on their types. We do exactly that here. */ #undef ASM_OUTPUT_ALIGNED_LOCAL #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \ do { \ switch_to_section (bss_section); \ ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \ if (!flag_inhibit_size_directive) \ ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE); \ ASM_OUTPUT_ALIGN ((FILE), exact_log2 ((ALIGN) / BITS_PER_UNIT)); \ ASM_OUTPUT_LABEL (FILE, NAME); \ ASM_OUTPUT_SKIP ((FILE), (SIZE) ? (SIZE) : 1); \ } while (0) /* Misc parameters. */ #define TARGET_SUPPORTS_WIDE_INT 1 #define STORE_FLAG_VALUE 1 #define Pmode SImode #define FUNCTION_MODE Pmode #define CASE_VECTOR_MODE Pmode /* See definition of clz pattern for rationale of value -1. */ #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = -1, 2) /* Jumps are cheap on PRU. */ #define LOGICAL_OP_NON_SHORT_CIRCUIT 0 /* Unfortunately the LBBO instruction does not zero-extend data. */ #undef LOAD_EXTEND_OP #undef WORD_REGISTER_OPERATIONS #define HAS_LONG_UNCOND_BRANCH 1 #define HAS_LONG_COND_BRANCH 1 #define REGISTER_TARGET_PRAGMAS() pru_register_pragmas () #endif /* GCC_PRU_H */