/* Target Definitions for NVPTX. Copyright (C) 2014-2015 Free Software Foundation, Inc. Contributed by Bernd Schmidt 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_NVPTX_H #define GCC_NVPTX_H /* Run-time Target. */ #define STARTFILE_SPEC "%{mmainkernel:crt0.o}" #define TARGET_CPU_CPP_BUILTINS() \ do \ { \ builtin_assert ("machine=nvptx"); \ builtin_assert ("cpu=nvptx"); \ builtin_define ("__nvptx__"); \ } while (0) /* Storage Layout. */ #define BITS_BIG_ENDIAN 0 #define BYTES_BIG_ENDIAN 0 #define WORDS_BIG_ENDIAN 0 /* Chosen such that we won't have to deal with multi-word subregs. */ #define UNITS_PER_WORD 8 #define PARM_BOUNDARY 8 #define STACK_BOUNDARY 64 #define FUNCTION_BOUNDARY 32 #define BIGGEST_ALIGNMENT 64 #define STRICT_ALIGNMENT 1 /* Copied from elf.h and other places. We'd otherwise use BIGGEST_ALIGNMENT and fail a number of testcases. */ #define MAX_OFILE_ALIGNMENT (32768 * 8) /* Type Layout. */ #define DEFAULT_SIGNED_CHAR 1 #define SHORT_TYPE_SIZE 16 #define INT_TYPE_SIZE 32 #define LONG_TYPE_SIZE (TARGET_ABI64 ? 64 : 32) #define LONG_LONG_TYPE_SIZE 64 #define FLOAT_TYPE_SIZE 32 #define DOUBLE_TYPE_SIZE 64 #define LONG_DOUBLE_TYPE_SIZE 64 #undef SIZE_TYPE #define SIZE_TYPE (TARGET_ABI64 ? "long unsigned int" : "unsigned int") #undef PTRDIFF_TYPE #define PTRDIFF_TYPE (TARGET_ABI64 ? "long int" : "int") #define POINTER_SIZE (TARGET_ABI64 ? 64 : 32) #define Pmode (TARGET_ABI64 ? DImode : SImode) /* Registers. Since ptx is a virtual target, we just define a few hard registers for special purposes and leave pseudos unallocated. */ #define FIRST_PSEUDO_REGISTER 16 #define FIXED_REGISTERS \ { 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1 } #define CALL_USED_REGISTERS \ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 } #define HARD_REGNO_NREGS(regno, mode) 1 #define CANNOT_CHANGE_MODE_CLASS(M1, M2, CLS) ((CLS) == RETURN_REG) #define HARD_REGNO_MODE_OK(REG, MODE) nvptx_hard_regno_mode_ok (REG, MODE) /* Register Classes. */ enum reg_class { NO_REGS, RETURN_REG, ALL_REGS, LIM_REG_CLASSES }; #define N_REG_CLASSES (int) LIM_REG_CLASSES #define REG_CLASS_NAMES { \ "RETURN_REG", \ "NO_REGS", \ "ALL_REGS" } #define REG_CLASS_CONTENTS \ { \ /* NO_REGS. */ \ { 0x0000 }, \ /* RETURN_REG. */ \ { 0x0008 }, \ /* ALL_REGS. */ \ { 0xFFFF }, \ } #define GENERAL_REGS ALL_REGS #define REGNO_REG_CLASS(R) ((R) == 4 ? RETURN_REG : ALL_REGS) #define BASE_REG_CLASS ALL_REGS #define INDEX_REG_CLASS NO_REGS #define REGNO_OK_FOR_BASE_P(X) true #define REGNO_OK_FOR_INDEX_P(X) false #define CLASS_MAX_NREGS(class, mode) \ ((GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) #define MODES_TIEABLE_P(M1, M2) false #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \ if (GET_MODE_CLASS (MODE) == MODE_INT \ && GET_MODE_SIZE (MODE) < GET_MODE_SIZE (SImode)) \ { \ (MODE) = SImode; \ } /* Address spaces. */ #define ADDR_SPACE_GLOBAL 1 #define ADDR_SPACE_SHARED 3 #define ADDR_SPACE_CONST 4 #define ADDR_SPACE_LOCAL 5 #define ADDR_SPACE_PARAM 101 /* Stack and Calling. */ #define STARTING_FRAME_OFFSET 0 #define FRAME_GROWS_DOWNWARD 0 #define STACK_GROWS_DOWNWARD #define STACK_POINTER_REGNUM 1 #define HARD_FRAME_POINTER_REGNUM 2 #define NVPTX_PUNNING_BUFFER_REGNUM 3 #define NVPTX_RETURN_REGNUM 4 #define FRAME_POINTER_REGNUM 15 #define ARG_POINTER_REGNUM 14 #define RETURN_ADDR_REGNO 13 #define STATIC_CHAIN_REGNUM 12 #define OUTGOING_ARG_POINTER_REGNUM 11 #define OUTGOING_STATIC_CHAIN_REGNUM 10 #define FIRST_PARM_OFFSET(FNDECL) 0 #define PUSH_ARGS_REVERSED 1 #define ACCUMULATE_OUTGOING_ARGS 1 #ifdef HOST_WIDE_INT struct nvptx_args { union tree_node *fntype; /* Number of arguments passed in registers so far. */ int count; /* Offset into the stdarg area so far. */ HOST_WIDE_INT off; }; #endif #define CUMULATIVE_ARGS struct nvptx_args #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \ do { (CUM).fntype = (FNTYPE); (CUM).count = 0; (CUM).off = 0; } while (0) #define FUNCTION_ARG_REGNO_P(r) 0 #define DEFAULT_PCC_STRUCT_RETURN 0 #define FUNCTION_PROFILER(file, labelno) \ fatal_error ("profiling is not yet implemented for this architecture") #define TRAMPOLINE_SIZE 32 #define TRAMPOLINE_ALIGNMENT 256 /* We don't run reload, so this isn't actually used, but it still needs to be defined. Showing an argp->fp elimination also stops expand_builtin_setjmp_receiver from generating invalid insns. */ #define ELIMINABLE_REGS \ { \ { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \ { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM} \ } /* Define the offset between two registers, one to be eliminated, and the other its replacement, at the start of a routine. */ #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ ((OFFSET) = 0) /* Addressing Modes. */ #define MAX_REGS_PER_ADDRESS 1 #define LEGITIMATE_PIC_OPERAND_P(X) 1 struct nvptx_pseudo_info { int true_size; int renumber; }; #if defined HOST_WIDE_INT struct GTY(()) machine_function { rtx_expr_list *call_args; rtx start_call; tree funtype; bool has_call_with_varargs; bool has_call_with_sc; struct GTY((skip)) nvptx_pseudo_info *pseudos; HOST_WIDE_INT outgoing_stdarg_size; int ret_reg_mode; int punning_buffer_size; }; #endif /* Costs. */ #define NO_FUNCTION_CSE 1 #define SLOW_BYTE_ACCESS 0 #define BRANCH_COST(speed_p, predictable_p) 6 /* Assembler Format. */ #undef ASM_DECLARE_FUNCTION_NAME #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ nvptx_declare_function_name (FILE, NAME, DECL) #undef ASM_DECLARE_FUNCTION_SIZE #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) \ nvptx_function_end (STREAM) #define DWARF2_ASM_LINE_DEBUG_INFO 1 #undef ASM_APP_ON #define ASM_APP_ON "\t// #APP \n" #undef ASM_APP_OFF #define ASM_APP_OFF "\t// #NO_APP \n" #define ASM_OUTPUT_COMMON(stream, name, size, rounded) #define ASM_OUTPUT_LOCAL(stream, name, size, rounded) #define REGISTER_NAMES \ { \ "%hr0", "%outargs", "%hfp", "%punbuffer", "%retval", "%retval_in", "%hr6", "%hr7", \ "%hr8", "%hr9", "%hr10", "%hr11", "%hr12", "%hr13", "%argp", "%frame" \ } #define DBX_REGISTER_NUMBER(N) N #define TEXT_SECTION_ASM_OP "" #define DATA_SECTION_ASM_OP "" #undef ASM_GENERATE_INTERNAL_LABEL #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \ do \ { \ char *__p; \ __p = stpcpy (&(LABEL)[1], PREFIX); \ (LABEL)[0] = '$'; \ sprint_ul (__p, (unsigned long) (NUM)); \ } \ while (0) #define ASM_OUTPUT_ALIGN(FILE, POWER) \ do \ { \ (void) (FILE); \ (void) (POWER); \ } \ while (0) #define ASM_OUTPUT_SKIP(FILE, N) \ nvptx_output_skip (FILE, N) #undef ASM_OUTPUT_ASCII #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \ nvptx_output_ascii (FILE, STR, LENGTH); #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \ nvptx_declare_object_name (FILE, NAME, DECL) #undef ASM_OUTPUT_ALIGNED_DECL_COMMON #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \ do \ { \ fprintf (FILE, "// BEGIN%s VAR DEF: ", \ TREE_PUBLIC (DECL) ? " GLOBAL" : ""); \ assemble_name_raw (FILE, NAME); \ fputc ('\n', FILE); \ const char *sec = nvptx_section_for_decl (DECL); \ fprintf (FILE, ".visible%s.align %d .b8 ", sec, \ (ALIGN) / BITS_PER_UNIT); \ assemble_name ((FILE), (NAME)); \ if ((SIZE) > 0) \ fprintf (FILE, "["HOST_WIDE_INT_PRINT_DEC"]", (SIZE)); \ fprintf (FILE, ";\n"); \ } \ while (0) #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \ do \ { \ fprintf (FILE, "// BEGIN VAR DEF: "); \ assemble_name_raw (FILE, NAME); \ fputc ('\n', FILE); \ const char *sec = nvptx_section_for_decl (DECL); \ fprintf (FILE, ".visible%s.align %d .b8 ", sec, \ (ALIGN) / BITS_PER_UNIT); \ assemble_name ((FILE), (NAME)); \ if ((SIZE) > 0) \ fprintf (FILE, "["HOST_WIDE_INT_PRINT_DEC"]", (SIZE)); \ fprintf (FILE, ";\n"); \ } \ while (0) #define CASE_VECTOR_PC_RELATIVE flag_pic #define JUMP_TABLES_IN_TEXT_SECTION flag_pic #define ADDR_VEC_ALIGN(VEC) (JUMP_TABLES_IN_TEXT_SECTION ? 5 : 2) /* Misc. */ #define DWARF2_DEBUGGING_INFO 1 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \ ((VALUE) = GET_MODE_BITSIZE ((MODE)), 2) #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \ ((VALUE) = GET_MODE_BITSIZE ((MODE)), 2) #define NO_DOT_IN_LABEL #define ASM_COMMENT_START "//" #define STORE_FLAG_VALUE -1 #define FLOAT_STORE_FLAG_VALUE(MODE) REAL_VALUE_ATOF("1.0", (MODE)) #define CASE_VECTOR_MODE SImode #define MOVE_MAX 4 #define MOVE_RATIO(SPEED) 4 #define TRULY_NOOP_TRUNCATION(outprec, inprec) 1 #define FUNCTION_MODE QImode #define HAS_INIT_SECTION 1 #endif /* GCC_NVPTX_H */