gcc/config/nvptx/nvptx.h

   1 /* Target Definitions for NVPTX.
   2    Copyright (C) 2014-2016 Free Software Foundation, Inc.
   3    Contributed by Bernd Schmidt <bernds@codesourcery.com>
   4
   5    This file is part of GCC.
   6
   7    GCC is free software; you can redistribute it and/or modify it
   8    under the terms of the GNU General Public License as published
   9    by the Free Software Foundation; either version 3, or (at your
  10    option) any later version.
  11
  12    GCC is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15    License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GCC; see the file COPYING3.  If not see
  19    <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef GCC_NVPTX_H
  22 #define GCC_NVPTX_H
  23
  24 /* Run-time Target.  */
  25
  26 #define STARTFILE_SPEC "%{mmainkernel:crt0.o}"
  27
  28 #define TARGET_CPU_CPP_BUILTINS()               \
  29   do                                            \
  30     {                                           \
  31       builtin_assert ("machine=nvptx");         \
  32       builtin_assert ("cpu=nvptx");             \
  33       builtin_define ("__nvptx__");             \
  34     } while (0)
  35
  36 /* Avoid the default in ../../gcc.c, which adds "-pthread", which is not
  37    supported for nvptx.  */
  38 #define GOMP_SELF_SPECS ""
  39
  40 /* Storage Layout.  */
  41
  42 #define BITS_BIG_ENDIAN 0
  43 #define BYTES_BIG_ENDIAN 0
  44 #define WORDS_BIG_ENDIAN 0
  45
  46 /* Chosen such that we won't have to deal with multi-word subregs.  */
  47 #define UNITS_PER_WORD 8
  48
  49 /* Alignments in bits.  */
  50 #define PARM_BOUNDARY 32
  51 #define STACK_BOUNDARY 64
  52 #define FUNCTION_BOUNDARY 32
  53 #define BIGGEST_ALIGNMENT 64
  54 #define STRICT_ALIGNMENT 1
  55
  56 #define MAX_STACK_ALIGNMENT (1024 * 8)
  57
  58 /* Copied from elf.h and other places.  We'd otherwise use
  59    BIGGEST_ALIGNMENT and fail a number of testcases.  */
  60 #define MAX_OFILE_ALIGNMENT (32768 * 8)
  61
  62 /* Type Layout.  */
  63
  64 #define DEFAULT_SIGNED_CHAR 1
  65
  66 #define SHORT_TYPE_SIZE 16
  67 #define INT_TYPE_SIZE 32
  68 #define LONG_TYPE_SIZE (TARGET_ABI64 ? 64 : 32)
  69 #define LONG_LONG_TYPE_SIZE 64
  70 #define FLOAT_TYPE_SIZE 32
  71 #define DOUBLE_TYPE_SIZE 64
  72 #define LONG_DOUBLE_TYPE_SIZE 64
  73 #define TARGET_SUPPORTS_WIDE_INT 1
  74
  75 #undef SIZE_TYPE
  76 #define SIZE_TYPE (TARGET_ABI64 ? "long unsigned int" : "unsigned int")
  77 #undef PTRDIFF_TYPE
  78 #define PTRDIFF_TYPE (TARGET_ABI64 ? "long int" : "int")
  79
  80 #define POINTER_SIZE (TARGET_ABI64 ? 64 : 32)
  81 #define Pmode (TARGET_ABI64 ? DImode : SImode)
  82
  83 /* Registers.  Since ptx is a virtual target, we just define a few
  84    hard registers for special purposes and leave pseudos unallocated.
  85    We have to have some available hard registers, to keep gcc setup
  86    happy.  */
  87 #define FIRST_PSEUDO_REGISTER 16
  88 #define FIXED_REGISTERS     { 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
  89 #define CALL_USED_REGISTERS { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }
  90
  91 #define HARD_REGNO_NREGS(REG, MODE)             \
  92   ((void)(REG), (void)(MODE), 1)
  93 #define CANNOT_CHANGE_MODE_CLASS(M1, M2, CLS)   \
  94   ((void)(M1), (void)(M2), (void)(CLS), true)
  95 #define HARD_REGNO_MODE_OK(REG, MODE)           \
  96      ((void)(REG), (void)(MODE), true)
  97
  98 /* Register Classes.  */
  99 enum reg_class             {  NO_REGS,    ALL_REGS,     LIM_REG_CLASSES };
 100 #define REG_CLASS_NAMES    { "NO_REGS",  "ALL_REGS" }
 101 #define REG_CLASS_CONTENTS { { 0x0000 }, { 0xFFFF } }
 102 #define N_REG_CLASSES (int) LIM_REG_CLASSES
 103
 104 #define GENERAL_REGS ALL_REGS
 105 #define REGNO_REG_CLASS(R) ((void)(R), ALL_REGS)
 106 #define BASE_REG_CLASS ALL_REGS
 107 #define INDEX_REG_CLASS NO_REGS
 108
 109 #define REGNO_OK_FOR_BASE_P(X) true
 110 #define REGNO_OK_FOR_INDEX_P(X) false
 111
 112 #define CLASS_MAX_NREGS(class, mode) \
 113   ((GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
 114
 115 #define MODES_TIEABLE_P(M1, M2) false
 116
 117 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE)             \
 118   if ((MODE) == QImode || (MODE) == HImode)             \
 119     {                                                   \
 120       (MODE) = SImode;                                  \
 121       (void)(UNSIGNEDP);                                \
 122       (void)(TYPE);                                     \
 123     }
 124
 125 /* Stack and Calling.  */
 126
 127 #define STARTING_FRAME_OFFSET 0
 128 #define FRAME_GROWS_DOWNWARD 0
 129 #define STACK_GROWS_DOWNWARD 1
 130
 131 #define NVPTX_RETURN_REGNUM 0
 132 #define STACK_POINTER_REGNUM 1
 133 #define FRAME_POINTER_REGNUM 2
 134 #define ARG_POINTER_REGNUM 3
 135 #define STATIC_CHAIN_REGNUM 4
 136
 137 #define REGISTER_NAMES                                                  \
 138   {                                                                     \
 139     "%value", "%stack", "%frame", "%args", "%chain", "%hr5", "%hr6", "%hr7", \
 140     "%hr8", "%hr9", "%hr10", "%hr11", "%hr12", "%hr13", "%hr14", "%hr15" \
 141   }
 142
 143 #define FIRST_PARM_OFFSET(FNDECL) ((void)(FNDECL), 0)
 144 #define PUSH_ARGS_REVERSED 1
 145 #define ACCUMULATE_OUTGOING_ARGS 1
 146
 147 /* Avoid using the argument pointer for frame-related things.  */
 148 #define FRAME_POINTER_CFA_OFFSET(FNDECL) ((void)(FNDECL), 0)
 149
 150 #ifdef HOST_WIDE_INT
 151 struct nvptx_args {
 152   tree fntype;
 153   /* Number of arguments passed in registers so far.  */
 154   int count;
 155 };
 156 #endif
 157
 158 #define CUMULATIVE_ARGS struct nvptx_args
 159
 160 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
 161   ((CUM).fntype = (FNTYPE), (CUM).count = 0, (void)0)
 162
 163 #define FUNCTION_ARG_REGNO_P(r) 0
 164
 165 #define DEFAULT_PCC_STRUCT_RETURN 0
 166
 167 #define FUNCTION_PROFILER(file, labelno) \
 168   fatal_error (input_location, \
 169                "profiling is not yet implemented for this architecture")
 170
 171 #define TRAMPOLINE_SIZE 32
 172 #define TRAMPOLINE_ALIGNMENT 256
 173 \f
 174 /* We don't run reload, so this isn't actually used, but it still needs to be
 175    defined.  Showing an argp->fp elimination also stops
 176    expand_builtin_setjmp_receiver from generating invalid insns.  */
 177 #define ELIMINABLE_REGS                                 \
 178   {                                                     \
 179     { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM} \
 180   }
 181
 182 /* Define the offset between two registers, one to be eliminated, and the other
 183    its replacement, at the start of a routine.  */
 184
 185 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
 186   ((OFFSET) = 0)
 187 \f
 188 /* Addressing Modes.  */
 189
 190 #define MAX_REGS_PER_ADDRESS 1
 191
 192 #define LEGITIMATE_PIC_OPERAND_P(X) 1
 193 \f
 194
 195 #if defined HOST_WIDE_INT
 196 struct GTY(()) machine_function
 197 {
 198   rtx_expr_list *call_args;  /* Arg list for the current call.  */
 199   bool doing_call; /* Within a CALL_ARGS ... CALL_ARGS_END sequence.  */
 200   bool is_varadic;  /* This call is varadic  */
 201   bool has_varadic;  /* Current function has a varadic call.  */
 202   bool has_chain; /* Current function has outgoing static chain.  */
 203   int num_args; /* Number of args of current call.  */
 204   int return_mode; /* Return mode of current fn.
 205                       (machine_mode not defined yet.) */
 206   rtx axis_predicate[2]; /* Neutering predicates.  */
 207 };
 208 #endif
 209 \f
 210 /* Costs.  */
 211
 212 #define NO_FUNCTION_CSE 1
 213 #define SLOW_BYTE_ACCESS 0
 214 #define BRANCH_COST(speed_p, predictable_p) 6
 215 \f
 216 /* Assembler Format.  */
 217
 218 #undef ASM_DECLARE_FUNCTION_NAME
 219 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 220   nvptx_declare_function_name (FILE, NAME, DECL)
 221
 222 #undef ASM_DECLARE_FUNCTION_SIZE
 223 #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) \
 224   nvptx_function_end (STREAM)
 225
 226 #define DWARF2_ASM_LINE_DEBUG_INFO 1
 227
 228 #undef ASM_APP_ON
 229 #define ASM_APP_ON "\t// #APP \n"
 230 #undef ASM_APP_OFF
 231 #define ASM_APP_OFF "\t// #NO_APP \n"
 232
 233 #define DBX_REGISTER_NUMBER(N) N
 234
 235 #define TEXT_SECTION_ASM_OP ""
 236 #define DATA_SECTION_ASM_OP ""
 237
 238 #undef  ASM_GENERATE_INTERNAL_LABEL
 239 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM)         \
 240   do                                                            \
 241     {                                                           \
 242       char *__p;                                                \
 243       __p = stpcpy (&(LABEL)[1], PREFIX);                       \
 244       (LABEL)[0] = '$';                                         \
 245       sprint_ul (__p, (unsigned long) (NUM));                   \
 246     }                                                           \
 247   while (0)
 248
 249 #define ASM_OUTPUT_ALIGN(FILE, POWER)           \
 250   do                                            \
 251     {                                           \
 252       (void) (FILE);                            \
 253       (void) (POWER);                           \
 254     }                                           \
 255   while (0)
 256
 257 #define ASM_OUTPUT_SKIP(FILE, N)                \
 258   nvptx_output_skip (FILE, N)
 259
 260 #undef  ASM_OUTPUT_ASCII
 261 #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH)                     \
 262   nvptx_output_ascii (FILE, STR, LENGTH);
 263
 264 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)       \
 265   nvptx_declare_object_name (FILE, NAME, DECL)
 266
 267 #undef  ASM_OUTPUT_ALIGNED_DECL_COMMON
 268 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN)   \
 269   nvptx_output_aligned_decl (FILE, NAME, DECL, SIZE, ALIGN)
 270
 271 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 272 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 273   nvptx_output_aligned_decl (FILE, NAME, DECL, SIZE, ALIGN)
 274
 275 #define CASE_VECTOR_PC_RELATIVE flag_pic
 276 #define JUMP_TABLES_IN_TEXT_SECTION flag_pic
 277
 278 #define ADDR_VEC_ALIGN(VEC) (JUMP_TABLES_IN_TEXT_SECTION ? 5 : 2)
 279
 280 /* Misc.  */
 281
 282 #define DWARF2_LINENO_DEBUGGING_INFO 1
 283
 284 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \
 285   ((VALUE) = GET_MODE_BITSIZE ((MODE)), 2)
 286 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \
 287   ((VALUE) = GET_MODE_BITSIZE ((MODE)), 2)
 288
 289 #define SUPPORTS_WEAK 1
 290 #define NO_DOT_IN_LABEL
 291 #define ASM_COMMENT_START "//"
 292
 293 #define STORE_FLAG_VALUE -1
 294 #define FLOAT_STORE_FLAG_VALUE(MODE) REAL_VALUE_ATOF("1.0", (MODE))
 295
 296 #define CASE_VECTOR_MODE SImode
 297 #define MOVE_MAX 8
 298 #define MOVE_RATIO(SPEED) 4
 299 #define TRULY_NOOP_TRUNCATION(outprec, inprec) 1
 300 #define FUNCTION_MODE QImode
 301 #define HAS_INIT_SECTION 1
 302
 303 /* The C++ front end insists to link against libstdc++ -- which we don't build.
 304    Tell it to instead link against the innocuous libgcc.  */
 305 #define LIBSTDCXX "gcc"
 306
 307 #endif /* GCC_NVPTX_H */