gcc/config/i386/i386-c.c

   1 /* Subroutines used for macro/preprocessor support on the ia-32.
   2    Copyright (C) 2008-2015 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 3, or (at your option)
   9 any later version.
  10
  11 GCC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #include "config.h"
  21 #include "system.h"
  22 #include "coretypes.h"
  23 #include "target.h"
  24 #include "c-family/c-common.h"
  25 #include "tm_p.h"
  26 #include "c-family/c-pragma.h"
  27
  28 static bool ix86_pragma_target_parse (tree, tree);
  29 static void ix86_target_macros_internal
  30   (HOST_WIDE_INT, enum processor_type, enum processor_type, enum fpmath_unit,
  31    void (*def_or_undef) (cpp_reader *, const char *));
  32
  33 \f
  34 /* Internal function to either define or undef the appropriate system
  35    macros.  */
  36 static void
  37 ix86_target_macros_internal (HOST_WIDE_INT isa_flag,
  38                              enum processor_type arch,
  39                              enum processor_type tune,
  40                              enum fpmath_unit fpmath,
  41                              void (*def_or_undef) (cpp_reader *,
  42                                                    const char *))
  43 {
  44   /* For some of the k6/pentium varients there weren't separate ISA bits to
  45      identify which tune/arch flag was passed, so figure it out here.  */
  46   size_t arch_len = strlen (ix86_arch_string);
  47   size_t tune_len = strlen (ix86_tune_string);
  48   int last_arch_char = ix86_arch_string[arch_len - 1];
  49   int last_tune_char = ix86_tune_string[tune_len - 1];
  50
  51   /* Built-ins based on -march=.  */
  52   switch (arch)
  53     {
  54     case PROCESSOR_I386:
  55       break;
  56     case PROCESSOR_I486:
  57       def_or_undef (parse_in, "__i486");
  58       def_or_undef (parse_in, "__i486__");
  59       break;
  60     case PROCESSOR_LAKEMONT:
  61       /* Intel MCU is based on Intel Pentium CPU.  */
  62     case PROCESSOR_PENTIUM:
  63       def_or_undef (parse_in, "__i586");
  64       def_or_undef (parse_in, "__i586__");
  65       def_or_undef (parse_in, "__pentium");
  66       def_or_undef (parse_in, "__pentium__");
  67       if (isa_flag & OPTION_MASK_ISA_MMX)
  68         def_or_undef (parse_in, "__pentium_mmx__");
  69       break;
  70     case PROCESSOR_PENTIUMPRO:
  71       def_or_undef (parse_in, "__i686");
  72       def_or_undef (parse_in, "__i686__");
  73       def_or_undef (parse_in, "__pentiumpro");
  74       def_or_undef (parse_in, "__pentiumpro__");
  75       break;
  76     case PROCESSOR_GEODE:
  77       def_or_undef (parse_in, "__geode");
  78       def_or_undef (parse_in, "__geode__");
  79       break;
  80     case PROCESSOR_K6:
  81       def_or_undef (parse_in, "__k6");
  82       def_or_undef (parse_in, "__k6__");
  83       if (last_arch_char == '2')
  84         def_or_undef (parse_in, "__k6_2__");
  85       else if (last_arch_char == '3')
  86         def_or_undef (parse_in, "__k6_3__");
  87       else if (isa_flag & OPTION_MASK_ISA_3DNOW)
  88         def_or_undef (parse_in, "__k6_3__");
  89       break;
  90     case PROCESSOR_ATHLON:
  91       def_or_undef (parse_in, "__athlon");
  92       def_or_undef (parse_in, "__athlon__");
  93       if (isa_flag & OPTION_MASK_ISA_SSE)
  94         def_or_undef (parse_in, "__athlon_sse__");
  95       break;
  96     case PROCESSOR_K8:
  97       def_or_undef (parse_in, "__k8");
  98       def_or_undef (parse_in, "__k8__");
  99       break;
 100     case PROCESSOR_AMDFAM10:
 101       def_or_undef (parse_in, "__amdfam10");
 102       def_or_undef (parse_in, "__amdfam10__");
 103       break;
 104     case PROCESSOR_BDVER1:
 105       def_or_undef (parse_in, "__bdver1");
 106       def_or_undef (parse_in, "__bdver1__");
 107       break;
 108     case PROCESSOR_BDVER2:
 109       def_or_undef (parse_in, "__bdver2");
 110       def_or_undef (parse_in, "__bdver2__");
 111       break;
 112     case PROCESSOR_BDVER3:
 113       def_or_undef (parse_in, "__bdver3");
 114       def_or_undef (parse_in, "__bdver3__");
 115       break;
 116     case PROCESSOR_BDVER4:
 117       def_or_undef (parse_in, "__bdver4");
 118       def_or_undef (parse_in, "__bdver4__");
 119       break;
 120     case PROCESSOR_ZNVER1:
 121       def_or_undef (parse_in, "__znver1");
 122       def_or_undef (parse_in, "__znver1__");
 123       break;
 124     case PROCESSOR_BTVER1:
 125       def_or_undef (parse_in, "__btver1");
 126       def_or_undef (parse_in, "__btver1__");
 127       break;
 128     case PROCESSOR_BTVER2:
 129       def_or_undef (parse_in, "__btver2");
 130       def_or_undef (parse_in, "__btver2__");
 131       break;
 132     case PROCESSOR_PENTIUM4:
 133       def_or_undef (parse_in, "__pentium4");
 134       def_or_undef (parse_in, "__pentium4__");
 135       break;
 136     case PROCESSOR_NOCONA:
 137       def_or_undef (parse_in, "__nocona");
 138       def_or_undef (parse_in, "__nocona__");
 139       break;
 140     case PROCESSOR_CORE2:
 141       def_or_undef (parse_in, "__core2");
 142       def_or_undef (parse_in, "__core2__");
 143       break;
 144     case PROCESSOR_NEHALEM:
 145       def_or_undef (parse_in, "__corei7");
 146       def_or_undef (parse_in, "__corei7__");
 147       def_or_undef (parse_in, "__nehalem");
 148       def_or_undef (parse_in, "__nehalem__");
 149       break;
 150     case PROCESSOR_SANDYBRIDGE:
 151       def_or_undef (parse_in, "__corei7_avx");
 152       def_or_undef (parse_in, "__corei7_avx__");
 153       def_or_undef (parse_in, "__sandybridge");
 154       def_or_undef (parse_in, "__sandybridge__");
 155       break;
 156     case PROCESSOR_HASWELL:
 157       def_or_undef (parse_in, "__core_avx2");
 158       def_or_undef (parse_in, "__core_avx2__");
 159       def_or_undef (parse_in, "__haswell");
 160       def_or_undef (parse_in, "__haswell__");
 161       break;
 162     case PROCESSOR_BONNELL:
 163       def_or_undef (parse_in, "__atom");
 164       def_or_undef (parse_in, "__atom__");
 165       def_or_undef (parse_in, "__bonnell");
 166       def_or_undef (parse_in, "__bonnell__");
 167       break;
 168     case PROCESSOR_SILVERMONT:
 169       def_or_undef (parse_in, "__slm");
 170       def_or_undef (parse_in, "__slm__");
 171       def_or_undef (parse_in, "__silvermont");
 172       def_or_undef (parse_in, "__silvermont__");
 173       break;
 174     case PROCESSOR_KNL:
 175       def_or_undef (parse_in, "__knl");
 176       def_or_undef (parse_in, "__knl__");
 177       break;
 178     case PROCESSOR_SKYLAKE_AVX512:
 179       def_or_undef (parse_in, "__skylake_avx512");
 180       def_or_undef (parse_in, "__skylake_avx512__");
 181       break;
 182     /* use PROCESSOR_max to not set/unset the arch macro.  */
 183     case PROCESSOR_max:
 184       break;
 185     case PROCESSOR_INTEL:
 186     case PROCESSOR_GENERIC:
 187       gcc_unreachable ();
 188     }
 189
 190   /* Built-ins based on -mtune=.  */
 191   switch (tune)
 192     {
 193     case PROCESSOR_I386:
 194       def_or_undef (parse_in, "__tune_i386__");
 195       break;
 196     case PROCESSOR_I486:
 197       def_or_undef (parse_in, "__tune_i486__");
 198       break;
 199     case PROCESSOR_PENTIUM:
 200       def_or_undef (parse_in, "__tune_i586__");
 201       def_or_undef (parse_in, "__tune_pentium__");
 202       if (last_tune_char == 'x')
 203         def_or_undef (parse_in, "__tune_pentium_mmx__");
 204       break;
 205     case PROCESSOR_PENTIUMPRO:
 206       def_or_undef (parse_in, "__tune_i686__");
 207       def_or_undef (parse_in, "__tune_pentiumpro__");
 208       switch (last_tune_char)
 209         {
 210         case '3':
 211           def_or_undef (parse_in, "__tune_pentium3__");
 212           /* FALLTHRU */
 213         case '2':
 214           def_or_undef (parse_in, "__tune_pentium2__");
 215           break;
 216         }
 217       break;
 218     case PROCESSOR_GEODE:
 219       def_or_undef (parse_in, "__tune_geode__");
 220       break;
 221     case PROCESSOR_K6:
 222       def_or_undef (parse_in, "__tune_k6__");
 223       if (last_tune_char == '2')
 224         def_or_undef (parse_in, "__tune_k6_2__");
 225       else if (last_tune_char == '3')
 226         def_or_undef (parse_in, "__tune_k6_3__");
 227       else if (isa_flag & OPTION_MASK_ISA_3DNOW)
 228         def_or_undef (parse_in, "__tune_k6_3__");
 229       break;
 230     case PROCESSOR_ATHLON:
 231       def_or_undef (parse_in, "__tune_athlon__");
 232       if (isa_flag & OPTION_MASK_ISA_SSE)
 233         def_or_undef (parse_in, "__tune_athlon_sse__");
 234       break;
 235     case PROCESSOR_K8:
 236       def_or_undef (parse_in, "__tune_k8__");
 237       break;
 238     case PROCESSOR_AMDFAM10:
 239       def_or_undef (parse_in, "__tune_amdfam10__");
 240       break;
 241     case PROCESSOR_BDVER1:
 242       def_or_undef (parse_in, "__tune_bdver1__");
 243       break;
 244     case PROCESSOR_BDVER2:
 245       def_or_undef (parse_in, "__tune_bdver2__");
 246       break;
 247     case PROCESSOR_BDVER3:
 248       def_or_undef (parse_in, "__tune_bdver3__");
 249       break;
 250     case PROCESSOR_BDVER4:
 251       def_or_undef (parse_in, "__tune_bdver4__");
 252       break;
 253     case PROCESSOR_ZNVER1:
 254       def_or_undef (parse_in, "__tune_znver1__");
 255       break;
 256     case PROCESSOR_BTVER1:
 257       def_or_undef (parse_in, "__tune_btver1__");
 258       break;
 259     case PROCESSOR_BTVER2:
 260       def_or_undef (parse_in, "__tune_btver2__");
 261        break;
 262     case PROCESSOR_PENTIUM4:
 263       def_or_undef (parse_in, "__tune_pentium4__");
 264       break;
 265     case PROCESSOR_NOCONA:
 266       def_or_undef (parse_in, "__tune_nocona__");
 267       break;
 268     case PROCESSOR_CORE2:
 269       def_or_undef (parse_in, "__tune_core2__");
 270       break;
 271     case PROCESSOR_NEHALEM:
 272       def_or_undef (parse_in, "__tune_corei7__");
 273       def_or_undef (parse_in, "__tune_nehalem__");
 274       break;
 275     case PROCESSOR_SANDYBRIDGE:
 276       def_or_undef (parse_in, "__tune_corei7_avx__");
 277       def_or_undef (parse_in, "__tune_sandybridge__");
 278       break;
 279     case PROCESSOR_HASWELL:
 280       def_or_undef (parse_in, "__tune_core_avx2__");
 281       def_or_undef (parse_in, "__tune_haswell__");
 282       break;
 283     case PROCESSOR_BONNELL:
 284       def_or_undef (parse_in, "__tune_atom__");
 285       def_or_undef (parse_in, "__tune_bonnell__");
 286       break;
 287     case PROCESSOR_SILVERMONT:
 288       def_or_undef (parse_in, "__tune_slm__");
 289       def_or_undef (parse_in, "__tune_silvermont__");
 290       break;
 291     case PROCESSOR_KNL:
 292       def_or_undef (parse_in, "__tune_knl__");
 293       break;
 294     case PROCESSOR_SKYLAKE_AVX512:
 295       def_or_undef (parse_in, "__tune_skylake_avx512__");
 296       break;
 297     case PROCESSOR_LAKEMONT:
 298       def_or_undef (parse_in, "__tune_lakemont__");
 299       break;
 300     case PROCESSOR_INTEL:
 301     case PROCESSOR_GENERIC:
 302       break;
 303     /* use PROCESSOR_max to not set/unset the tune macro.  */
 304     case PROCESSOR_max:
 305       break;
 306     }
 307
 308   switch (ix86_cmodel)
 309     {
 310     case CM_SMALL:
 311     case CM_SMALL_PIC:
 312       def_or_undef (parse_in, "__code_model_small__");
 313       break;
 314     case CM_MEDIUM:
 315     case CM_MEDIUM_PIC:
 316       def_or_undef (parse_in, "__code_model_medium__");
 317       break;
 318     case CM_LARGE:
 319     case CM_LARGE_PIC:
 320       def_or_undef (parse_in, "__code_model_large__");
 321       break;
 322     case CM_32:
 323       def_or_undef (parse_in, "__code_model_32__");
 324       break;
 325     case CM_KERNEL:
 326       def_or_undef (parse_in, "__code_model_kernel__");
 327       break;
 328     default:
 329       ;
 330     }
 331
 332   if (isa_flag & OPTION_MASK_ISA_MMX)
 333     def_or_undef (parse_in, "__MMX__");
 334   if (isa_flag & OPTION_MASK_ISA_3DNOW)
 335     def_or_undef (parse_in, "__3dNOW__");
 336   if (isa_flag & OPTION_MASK_ISA_3DNOW_A)
 337     def_or_undef (parse_in, "__3dNOW_A__");
 338   if (isa_flag & OPTION_MASK_ISA_SSE)
 339     def_or_undef (parse_in, "__SSE__");
 340   if (isa_flag & OPTION_MASK_ISA_SSE2)
 341     def_or_undef (parse_in, "__SSE2__");
 342   if (isa_flag & OPTION_MASK_ISA_SSE3)
 343     def_or_undef (parse_in, "__SSE3__");
 344   if (isa_flag & OPTION_MASK_ISA_SSSE3)
 345     def_or_undef (parse_in, "__SSSE3__");
 346   if (isa_flag & OPTION_MASK_ISA_SSE4_1)
 347     def_or_undef (parse_in, "__SSE4_1__");
 348   if (isa_flag & OPTION_MASK_ISA_SSE4_2)
 349     def_or_undef (parse_in, "__SSE4_2__");
 350   if (isa_flag & OPTION_MASK_ISA_AES)
 351     def_or_undef (parse_in, "__AES__");
 352   if (isa_flag & OPTION_MASK_ISA_SHA)
 353     def_or_undef (parse_in, "__SHA__");
 354   if (isa_flag & OPTION_MASK_ISA_PCLMUL)
 355     def_or_undef (parse_in, "__PCLMUL__");
 356   if (isa_flag & OPTION_MASK_ISA_AVX)
 357     def_or_undef (parse_in, "__AVX__");
 358   if (isa_flag & OPTION_MASK_ISA_AVX2)
 359     def_or_undef (parse_in, "__AVX2__");
 360   if (isa_flag & OPTION_MASK_ISA_AVX512F)
 361     def_or_undef (parse_in, "__AVX512F__");
 362   if (isa_flag & OPTION_MASK_ISA_AVX512ER)
 363     def_or_undef (parse_in, "__AVX512ER__");
 364   if (isa_flag & OPTION_MASK_ISA_AVX512CD)
 365     def_or_undef (parse_in, "__AVX512CD__");
 366   if (isa_flag & OPTION_MASK_ISA_AVX512PF)
 367     def_or_undef (parse_in, "__AVX512PF__");
 368   if (isa_flag & OPTION_MASK_ISA_AVX512DQ)
 369     def_or_undef (parse_in, "__AVX512DQ__");
 370   if (isa_flag & OPTION_MASK_ISA_AVX512BW)
 371     def_or_undef (parse_in, "__AVX512BW__");
 372   if (isa_flag & OPTION_MASK_ISA_AVX512VL)
 373     def_or_undef (parse_in, "__AVX512VL__");
 374   if (isa_flag & OPTION_MASK_ISA_AVX512VBMI)
 375     def_or_undef (parse_in, "__AVX512VBMI__");
 376   if (isa_flag & OPTION_MASK_ISA_AVX512IFMA)
 377     def_or_undef (parse_in, "__AVX512IFMA__");
 378   if (isa_flag & OPTION_MASK_ISA_FMA)
 379     def_or_undef (parse_in, "__FMA__");
 380   if (isa_flag & OPTION_MASK_ISA_RTM)
 381     def_or_undef (parse_in, "__RTM__");
 382   if (isa_flag & OPTION_MASK_ISA_SSE4A)
 383     def_or_undef (parse_in, "__SSE4A__");
 384   if (isa_flag & OPTION_MASK_ISA_FMA4)
 385     def_or_undef (parse_in, "__FMA4__");
 386   if (isa_flag & OPTION_MASK_ISA_XOP)
 387     def_or_undef (parse_in, "__XOP__");
 388   if (isa_flag & OPTION_MASK_ISA_LWP)
 389     def_or_undef (parse_in, "__LWP__");
 390   if (isa_flag & OPTION_MASK_ISA_ABM)
 391     def_or_undef (parse_in, "__ABM__");
 392   if (isa_flag & OPTION_MASK_ISA_BMI)
 393     def_or_undef (parse_in, "__BMI__");
 394   if (isa_flag & OPTION_MASK_ISA_BMI2)
 395     def_or_undef (parse_in, "__BMI2__");
 396   if (isa_flag & OPTION_MASK_ISA_LZCNT)
 397     def_or_undef (parse_in, "__LZCNT__");
 398   if (isa_flag & OPTION_MASK_ISA_TBM)
 399     def_or_undef (parse_in, "__TBM__");
 400   if (isa_flag & OPTION_MASK_ISA_POPCNT)
 401     def_or_undef (parse_in, "__POPCNT__");
 402   if (isa_flag & OPTION_MASK_ISA_FSGSBASE)
 403     def_or_undef (parse_in, "__FSGSBASE__");
 404   if (isa_flag & OPTION_MASK_ISA_RDRND)
 405     def_or_undef (parse_in, "__RDRND__");
 406   if (isa_flag & OPTION_MASK_ISA_F16C)
 407     def_or_undef (parse_in, "__F16C__");
 408   if (isa_flag & OPTION_MASK_ISA_RDSEED)
 409     def_or_undef (parse_in, "__RDSEED__");
 410   if (isa_flag & OPTION_MASK_ISA_PRFCHW)
 411     def_or_undef (parse_in, "__PRFCHW__");
 412   if (isa_flag & OPTION_MASK_ISA_ADX)
 413     def_or_undef (parse_in, "__ADX__");
 414   if (isa_flag & OPTION_MASK_ISA_FXSR)
 415     def_or_undef (parse_in, "__FXSR__");
 416   if (isa_flag & OPTION_MASK_ISA_XSAVE)
 417     def_or_undef (parse_in, "__XSAVE__");
 418   if (isa_flag & OPTION_MASK_ISA_XSAVEOPT)
 419     def_or_undef (parse_in, "__XSAVEOPT__");
 420   if (isa_flag & OPTION_MASK_ISA_PREFETCHWT1)
 421     def_or_undef (parse_in, "__PREFETCHWT1__");
 422   if ((fpmath & FPMATH_SSE) && (isa_flag & OPTION_MASK_ISA_SSE))
 423     def_or_undef (parse_in, "__SSE_MATH__");
 424   if ((fpmath & FPMATH_SSE) && (isa_flag & OPTION_MASK_ISA_SSE2))
 425     def_or_undef (parse_in, "__SSE2_MATH__");
 426   if (isa_flag & OPTION_MASK_ISA_CLFLUSHOPT)
 427     def_or_undef (parse_in, "__CLFLUSHOPT__");
 428   if (isa_flag & OPTION_MASK_ISA_CLZERO)
 429     def_or_undef (parse_in, "__CLZERO__");
 430   if (isa_flag & OPTION_MASK_ISA_XSAVEC)
 431     def_or_undef (parse_in, "__XSAVEC__");
 432   if (isa_flag & OPTION_MASK_ISA_XSAVES)
 433     def_or_undef (parse_in, "__XSAVES__");
 434   if (isa_flag & OPTION_MASK_ISA_MPX)
 435     def_or_undef (parse_in, "__MPX__");
 436   if (isa_flag & OPTION_MASK_ISA_PCOMMIT)
 437     def_or_undef (parse_in, "__PCOMMIT__");
 438   if (isa_flag & OPTION_MASK_ISA_CLWB)
 439     def_or_undef (parse_in, "__CLWB__");
 440   if (isa_flag & OPTION_MASK_ISA_MWAITX)
 441     def_or_undef (parse_in, "__MWAITX__");
 442   if (TARGET_IAMCU)
 443     {
 444       def_or_undef (parse_in, "__iamcu");
 445       def_or_undef (parse_in, "__iamcu__");
 446     }
 447 }
 448
 449 \f
 450 /* Hook to validate the current #pragma GCC target and set the state, and
 451    update the macros based on what was changed.  If ARGS is NULL, then
 452    POP_TARGET is used to reset the options.  */
 453
 454 static bool
 455 ix86_pragma_target_parse (tree args, tree pop_target)
 456 {
 457   tree prev_tree = build_target_option_node (&global_options);
 458   tree cur_tree;
 459   struct cl_target_option *prev_opt;
 460   struct cl_target_option *cur_opt;
 461   HOST_WIDE_INT prev_isa;
 462   HOST_WIDE_INT cur_isa;
 463   HOST_WIDE_INT diff_isa;
 464   enum processor_type prev_arch;
 465   enum processor_type prev_tune;
 466   enum processor_type cur_arch;
 467   enum processor_type cur_tune;
 468
 469   if (! args)
 470     {
 471       cur_tree = (pop_target ? pop_target : target_option_default_node);
 472       cl_target_option_restore (&global_options,
 473                                 TREE_TARGET_OPTION (cur_tree));
 474     }
 475   else
 476     {
 477       cur_tree = ix86_valid_target_attribute_tree (args, &global_options,
 478                                                    &global_options_set);
 479       if (!cur_tree || cur_tree == error_mark_node)
 480        {
 481          cl_target_option_restore (&global_options,
 482                                    TREE_TARGET_OPTION (prev_tree));
 483          return false;
 484        }
 485     }
 486
 487   target_option_current_node = cur_tree;
 488   ix86_reset_previous_fndecl ();
 489
 490   /* Figure out the previous/current isa, arch, tune and the differences.  */
 491   prev_opt  = TREE_TARGET_OPTION (prev_tree);
 492   cur_opt   = TREE_TARGET_OPTION (cur_tree);
 493   prev_isa  = prev_opt->x_ix86_isa_flags;
 494   cur_isa   = cur_opt->x_ix86_isa_flags;
 495   diff_isa  = (prev_isa ^ cur_isa);
 496   prev_arch = (enum processor_type) prev_opt->arch;
 497   prev_tune = (enum processor_type) prev_opt->tune;
 498   cur_arch  = (enum processor_type) cur_opt->arch;
 499   cur_tune  = (enum processor_type) cur_opt->tune;
 500
 501   /* If the same processor is used for both previous and current options, don't
 502      change the macros.  */
 503   if (cur_arch == prev_arch)
 504     cur_arch = prev_arch = PROCESSOR_max;
 505
 506   if (cur_tune == prev_tune)
 507     cur_tune = prev_tune = PROCESSOR_max;
 508
 509   /* Undef all of the macros for that are no longer current.  */
 510   ix86_target_macros_internal (prev_isa & diff_isa,
 511                                prev_arch,
 512                                prev_tune,
 513                                (enum fpmath_unit) prev_opt->x_ix86_fpmath,
 514                                cpp_undef);
 515
 516   /* For the definitions, ensure all newly defined macros are considered
 517      as used for -Wunused-macros.  There is no point warning about the
 518      compiler predefined macros.  */
 519   cpp_options *cpp_opts = cpp_get_options (parse_in);
 520   unsigned char saved_warn_unused_macros = cpp_opts->warn_unused_macros;
 521   cpp_opts->warn_unused_macros = 0;
 522
 523   /* Define all of the macros for new options that were just turned on.  */
 524   ix86_target_macros_internal (cur_isa & diff_isa,
 525                                cur_arch,
 526                                cur_tune,
 527                                (enum fpmath_unit) cur_opt->x_ix86_fpmath,
 528                                cpp_define);
 529
 530   cpp_opts->warn_unused_macros = saved_warn_unused_macros;
 531
 532   return true;
 533 }
 534 \f
 535 /* Function to tell the preprocessor about the defines for the current target.  */
 536
 537 void
 538 ix86_target_macros (void)
 539 {
 540   /* 32/64-bit won't change with target specific options, so do the assert and
 541      builtin_define_std calls here.  */
 542   if (TARGET_64BIT)
 543     {
 544       cpp_assert (parse_in, "cpu=x86_64");
 545       cpp_assert (parse_in, "machine=x86_64");
 546       cpp_define (parse_in, "__amd64");
 547       cpp_define (parse_in, "__amd64__");
 548       cpp_define (parse_in, "__x86_64");
 549       cpp_define (parse_in, "__x86_64__");
 550       if (TARGET_X32)
 551         {
 552           cpp_define (parse_in, "_ILP32");
 553           cpp_define (parse_in, "__ILP32__");
 554         }
 555     }
 556   else
 557     {
 558       cpp_assert (parse_in, "cpu=i386");
 559       cpp_assert (parse_in, "machine=i386");
 560       builtin_define_std ("i386");
 561     }
 562
 563   if (!TARGET_80387)
 564     cpp_define (parse_in, "_SOFT_FLOAT");
 565
 566   if (TARGET_LONG_DOUBLE_64)
 567     cpp_define (parse_in, "__LONG_DOUBLE_64__");
 568
 569   if (TARGET_LONG_DOUBLE_128)
 570     cpp_define (parse_in, "__LONG_DOUBLE_128__");
 571
 572   if (TARGET_128BIT_LONG_DOUBLE)
 573     cpp_define (parse_in, "__SIZEOF_FLOAT80__=16");
 574   else
 575     cpp_define (parse_in, "__SIZEOF_FLOAT80__=12");
 576
 577   cpp_define (parse_in, "__SIZEOF_FLOAT128__=16");
 578
 579   cpp_define_formatted (parse_in, "__ATOMIC_HLE_ACQUIRE=%d", IX86_HLE_ACQUIRE);
 580   cpp_define_formatted (parse_in, "__ATOMIC_HLE_RELEASE=%d", IX86_HLE_RELEASE);
 581
 582   cpp_define (parse_in, "__GCC_ASM_FLAG_OUTPUTS__");
 583
 584   ix86_target_macros_internal (ix86_isa_flags,
 585                                ix86_arch,
 586                                ix86_tune,
 587                                ix86_fpmath,
 588                                cpp_define);
 589 }
 590
 591 \f
 592 /* Register target pragmas.  We need to add the hook for parsing #pragma GCC
 593    option here rather than in i386.c since it will pull in various preprocessor
 594    functions, and those are not present in languages like fortran without a
 595    preprocessor.  */
 596
 597 void
 598 ix86_register_pragmas (void)
 599 {
 600   /* Update pragma hook to allow parsing #pragma GCC target.  */
 601   targetm.target_option.pragma_parse = ix86_pragma_target_parse;
 602
 603 #ifdef REGISTER_SUBTARGET_PRAGMAS
 604   REGISTER_SUBTARGET_PRAGMAS ();
 605 #endif
 606 }