gcc/config/nvptx/nvptx.h

   1 /* Target Definitions for NVPTX.
   2    Copyright (C) 2014-2015 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 #define PARM_BOUNDARY 8
  50 #define STACK_BOUNDARY 64
  51 #define FUNCTION_BOUNDARY 32
  52 #define BIGGEST_ALIGNMENT 64
  53 #define STRICT_ALIGNMENT 1
  54
  55 #define MAX_STACK_ALIGNMENT (1024 * 8)
  56
  57 /* Copied from elf.h and other places.  We'd otherwise use
  58    BIGGEST_ALIGNMENT and fail a number of testcases.  */
  59 #define MAX_OFILE_ALIGNMENT (32768 * 8)
  60
  61 /* Type Layout.  */
  62
  63 #define DEFAULT_SIGNED_CHAR 1
  64
  65 #define SHORT_TYPE_SIZE 16
  66 #define INT_TYPE_SIZE 32
  67 #define LONG_TYPE_SIZE (TARGET_ABI64 ? 64 : 32)
  68 #define LONG_LONG_TYPE_SIZE 64
  69 #define FLOAT_TYPE_SIZE 32
  70 #define DOUBLE_TYPE_SIZE 64
  71 #define LONG_DOUBLE_TYPE_SIZE 64
  72
  73 #undef SIZE_TYPE
  74 #define SIZE_TYPE (TARGET_ABI64 ? "long unsigned int" : "unsigned int")
  75 #undef PTRDIFF_TYPE
  76 #define PTRDIFF_TYPE (TARGET_ABI64 ? "long int" : "int")
  77
  78 #define POINTER_SIZE (TARGET_ABI64 ? 64 : 32)
  79
  80 #define Pmode (TARGET_ABI64 ? DImode : SImode)
  81
  82 /* Registers.  Since ptx is a virtual target, we just define a few
  83    hard registers for special purposes and leave pseudos unallocated.  */
  84
  85 #define FIRST_PSEUDO_REGISTER 16
  86 #define FIXED_REGISTERS                                 \
  87   { 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1 }
  88 #define CALL_USED_REGISTERS                             \
  89   { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }
  90
  91 #define HARD_REGNO_NREGS(regno, mode)   1
  92 #define CANNOT_CHANGE_MODE_CLASS(M1, M2, CLS) ((CLS) == RETURN_REG)
  93 #define HARD_REGNO_MODE_OK(REG, MODE) nvptx_hard_regno_mode_ok (REG, MODE)
  94
  95 /* Register Classes.  */
  96
  97 enum reg_class
  98   {
  99     NO_REGS,
 100     RETURN_REG,
 101     ALL_REGS,
 102     LIM_REG_CLASSES
 103   };
 104
 105 #define N_REG_CLASSES (int) LIM_REG_CLASSES
 106
 107 #define REG_CLASS_NAMES {         \
 108     "RETURN_REG",                 \
 109     "NO_REGS",                    \
 110     "ALL_REGS" }
 111
 112 #define REG_CLASS_CONTENTS      \
 113 {                               \
 114   /* NO_REGS.  */               \
 115   { 0x0000 },                   \
 116   /* RETURN_REG.  */            \
 117   { 0x0008 },                   \
 118   /* ALL_REGS.  */              \
 119   { 0xFFFF },                   \
 120 }
 121
 122 #define GENERAL_REGS ALL_REGS
 123
 124 #define REGNO_REG_CLASS(R) ((R) == 4 ? RETURN_REG : ALL_REGS)
 125
 126 #define BASE_REG_CLASS ALL_REGS
 127 #define INDEX_REG_CLASS NO_REGS
 128
 129 #define REGNO_OK_FOR_BASE_P(X) true
 130 #define REGNO_OK_FOR_INDEX_P(X) false
 131
 132 #define CLASS_MAX_NREGS(class, mode) \
 133   ((GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
 134
 135 #define MODES_TIEABLE_P(M1, M2) false
 136
 137 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE)             \
 138   if (GET_MODE_CLASS (MODE) == MODE_INT                 \
 139       && GET_MODE_SIZE (MODE) < GET_MODE_SIZE (SImode)) \
 140     {                                                   \
 141       (MODE) = SImode;                                  \
 142     }
 143
 144 /* Address spaces.  */
 145 #define ADDR_SPACE_GLOBAL 1
 146 #define ADDR_SPACE_SHARED 3
 147 #define ADDR_SPACE_CONST 4
 148 #define ADDR_SPACE_LOCAL 5
 149 #define ADDR_SPACE_PARAM 101
 150
 151 /* Stack and Calling.  */
 152
 153 #define STARTING_FRAME_OFFSET 0
 154 #define FRAME_GROWS_DOWNWARD 0
 155 #define STACK_GROWS_DOWNWARD 1
 156
 157 #define STACK_POINTER_REGNUM 1
 158 #define HARD_FRAME_POINTER_REGNUM 2
 159 #define NVPTX_PUNNING_BUFFER_REGNUM 3
 160 #define NVPTX_RETURN_REGNUM 4
 161 #define FRAME_POINTER_REGNUM 15
 162 #define ARG_POINTER_REGNUM 14
 163 #define RETURN_ADDR_REGNO 13
 164
 165 #define STATIC_CHAIN_REGNUM 12
 166 #define OUTGOING_ARG_POINTER_REGNUM 11
 167 #define OUTGOING_STATIC_CHAIN_REGNUM 10
 168
 169 #define FIRST_PARM_OFFSET(FNDECL) 0
 170 #define PUSH_ARGS_REVERSED 1
 171
 172 #define ACCUMULATE_OUTGOING_ARGS 1
 173
 174 #ifdef HOST_WIDE_INT
 175 struct nvptx_args {
 176   union tree_node *fntype;
 177   /* Number of arguments passed in registers so far.  */
 178   int count;
 179   /* Offset into the stdarg area so far.  */
 180   HOST_WIDE_INT off;
 181 };
 182 #endif
 183
 184 #define CUMULATIVE_ARGS struct nvptx_args
 185
 186 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
 187   do { (CUM).fntype = (FNTYPE); (CUM).count = 0; (CUM).off = 0; } while (0)
 188
 189 #define FUNCTION_ARG_REGNO_P(r) 0
 190
 191 #define DEFAULT_PCC_STRUCT_RETURN 0
 192
 193 #define FUNCTION_PROFILER(file, labelno) \
 194   fatal_error (input_location, \
 195                "profiling is not yet implemented for this architecture")
 196
 197 #define TRAMPOLINE_SIZE 32
 198 #define TRAMPOLINE_ALIGNMENT 256
 199 \f
 200 /* We don't run reload, so this isn't actually used, but it still needs to be
 201    defined.  Showing an argp->fp elimination also stops
 202    expand_builtin_setjmp_receiver from generating invalid insns.  */
 203 #define ELIMINABLE_REGS                                 \
 204   {                                                     \
 205     { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \
 206     { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}    \
 207   }
 208
 209 /* Define the offset between two registers, one to be eliminated, and the other
 210    its replacement, at the start of a routine.  */
 211
 212 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
 213   ((OFFSET) = 0)
 214 \f
 215 /* Addressing Modes.  */
 216
 217 #define MAX_REGS_PER_ADDRESS 1
 218
 219 #define LEGITIMATE_PIC_OPERAND_P(X) 1
 220 \f
 221
 222 #if defined HOST_WIDE_INT
 223 struct GTY(()) machine_function
 224 {
 225   rtx_expr_list *call_args;
 226   rtx start_call;
 227   tree funtype;
 228   bool has_call_with_varargs;
 229   bool has_call_with_sc;
 230   HOST_WIDE_INT outgoing_stdarg_size;
 231   int ret_reg_mode;
 232   int punning_buffer_size;
 233 };
 234 #endif
 235 \f
 236 /* Costs.  */
 237
 238 #define NO_FUNCTION_CSE 1
 239 #define SLOW_BYTE_ACCESS 0
 240 #define BRANCH_COST(speed_p, predictable_p) 6
 241 \f
 242 /* Assembler Format.  */
 243
 244 #undef ASM_DECLARE_FUNCTION_NAME
 245 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 246   nvptx_declare_function_name (FILE, NAME, DECL)
 247
 248 #undef ASM_DECLARE_FUNCTION_SIZE
 249 #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) \
 250   nvptx_function_end (STREAM)
 251
 252 #define DWARF2_ASM_LINE_DEBUG_INFO 1
 253
 254 #undef ASM_APP_ON
 255 #define ASM_APP_ON "\t// #APP \n"
 256 #undef ASM_APP_OFF
 257 #define ASM_APP_OFF "\t// #NO_APP \n"
 258
 259 #define ASM_OUTPUT_COMMON(stream, name, size, rounded)
 260 #define ASM_OUTPUT_LOCAL(stream, name, size, rounded)
 261
 262 #define REGISTER_NAMES                                                  \
 263   {                                                                     \
 264     "%hr0", "%outargs", "%hfp", "%punbuffer", "%retval", "%retval_in", "%hr6", "%hr7",  \
 265     "%hr8", "%hr9", "%hr10", "%hr11", "%hr12", "%hr13", "%argp", "%frame" \
 266   }
 267
 268 #define DBX_REGISTER_NUMBER(N) N
 269
 270 #define TEXT_SECTION_ASM_OP ""
 271 #define DATA_SECTION_ASM_OP ""
 272
 273 #undef  ASM_GENERATE_INTERNAL_LABEL
 274 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM)         \
 275   do                                                            \
 276     {                                                           \
 277       char *__p;                                                \
 278       __p = stpcpy (&(LABEL)[1], PREFIX);                       \
 279       (LABEL)[0] = '$';                                         \
 280       sprint_ul (__p, (unsigned long) (NUM));                   \
 281     }                                                           \
 282   while (0)
 283
 284 #define ASM_OUTPUT_ALIGN(FILE, POWER)           \
 285   do                                            \
 286     {                                           \
 287       (void) (FILE);                            \
 288       (void) (POWER);                           \
 289     }                                           \
 290   while (0)
 291
 292 #define ASM_OUTPUT_SKIP(FILE, N)                \
 293   nvptx_output_skip (FILE, N)
 294
 295 #undef  ASM_OUTPUT_ASCII
 296 #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH)                     \
 297   nvptx_output_ascii (FILE, STR, LENGTH);
 298
 299 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)       \
 300   nvptx_declare_object_name (FILE, NAME, DECL)
 301
 302 #undef  ASM_OUTPUT_ALIGNED_DECL_COMMON
 303 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN)   \
 304   do                                                                    \
 305     {                                                                   \
 306       fprintf (FILE, "// BEGIN%s VAR DEF: ",                            \
 307                TREE_PUBLIC (DECL) ? " GLOBAL" : "");                    \
 308       assemble_name_raw (FILE, NAME);                                   \
 309       fputc ('\n', FILE);                                               \
 310       const char *sec = nvptx_section_for_decl (DECL);                  \
 311       fprintf (FILE, ".visible%s.align %d .b8 ", sec,                   \
 312                (ALIGN) / BITS_PER_UNIT);                                \
 313       assemble_name ((FILE), (NAME));                                   \
 314       if ((SIZE) > 0)                                                   \
 315         fprintf (FILE, "[" HOST_WIDE_INT_PRINT_DEC"]", (SIZE));         \
 316       fprintf (FILE, ";\n");                                            \
 317     }                                                                   \
 318   while (0)
 319
 320 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 321 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 322   do                                                                    \
 323     {                                                                   \
 324       fprintf (FILE, "// BEGIN VAR DEF: ");                             \
 325       assemble_name_raw (FILE, NAME);                                   \
 326       fputc ('\n', FILE);                                               \
 327       const char *sec = nvptx_section_for_decl (DECL);                  \
 328       fprintf (FILE, ".visible%s.align %d .b8 ", sec,                   \
 329                (ALIGN) / BITS_PER_UNIT);                                \
 330       assemble_name ((FILE), (NAME));                                   \
 331       if ((SIZE) > 0)                                                   \
 332         fprintf (FILE, "[" HOST_WIDE_INT_PRINT_DEC"]", (SIZE));         \
 333       fprintf (FILE, ";\n");                                            \
 334     }                                                                   \
 335   while (0)
 336
 337 #define CASE_VECTOR_PC_RELATIVE flag_pic
 338 #define JUMP_TABLES_IN_TEXT_SECTION flag_pic
 339
 340 #define ADDR_VEC_ALIGN(VEC) (JUMP_TABLES_IN_TEXT_SECTION ? 5 : 2)
 341
 342 /* Misc.  */
 343
 344 #define DWARF2_LINENO_DEBUGGING_INFO 1
 345
 346 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \
 347   ((VALUE) = GET_MODE_BITSIZE ((MODE)), 2)
 348 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \
 349   ((VALUE) = GET_MODE_BITSIZE ((MODE)), 2)
 350
 351 #define NO_DOT_IN_LABEL
 352 #define ASM_COMMENT_START "//"
 353
 354 #define STORE_FLAG_VALUE -1
 355 #define FLOAT_STORE_FLAG_VALUE(MODE) REAL_VALUE_ATOF("1.0", (MODE))
 356
 357 #define CASE_VECTOR_MODE SImode
 358 #define MOVE_MAX 4
 359 #define MOVE_RATIO(SPEED) 4
 360 #define TRULY_NOOP_TRUNCATION(outprec, inprec) 1
 361 #define FUNCTION_MODE QImode
 362 #define HAS_INIT_SECTION 1
 363
 364 /* The C++ front end insists to link against libstdc++ -- which we don't build.
 365    Tell it to instead link against the innocuous libgcc.  */
 366 #define LIBSTDCXX "gcc"
 367
 368 #endif /* GCC_NVPTX_H */