gcc/config/i386/i386-c.c

   1 /* Subroutines used for macro/preprocessor support on the ia-32.
   2    Copyright (C) 2008, 2009, 2010
   3    Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public 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 #include "config.h"
  22 #include "system.h"
  23 #include "coretypes.h"
  24 #include "tm.h"
  25 #include "tree.h"
  26 #include "tm_p.h"
  27 #include "flags.h"
  28 #include "c-family/c-common.h"
  29 #include "ggc.h"
  30 #include "target.h"
  31 #include "target-def.h"
  32 #include "cpplib.h"
  33 #include "c-family/c-pragma.h"
  34
  35 static bool ix86_pragma_target_parse (tree, tree);
  36 static void ix86_target_macros_internal
  37   (HOST_WIDE_INT, enum processor_type, enum processor_type, enum fpmath_unit,
  38    void (*def_or_undef) (cpp_reader *, const char *));
  39
  40 \f
  41 /* Internal function to either define or undef the appropriate system
  42    macros.  */
  43 static void
  44 ix86_target_macros_internal (HOST_WIDE_INT isa_flag,
  45                              enum processor_type arch,
  46                              enum processor_type tune,
  47                              enum fpmath_unit fpmath,
  48                              void (*def_or_undef) (cpp_reader *,
  49                                                    const char *))
  50 {
  51   /* For some of the k6/pentium varients there weren't seperate ISA bits to
  52      identify which tune/arch flag was passed, so figure it out here.  */
  53   size_t arch_len = strlen (ix86_arch_string);
  54   size_t tune_len = strlen (ix86_tune_string);
  55   int last_arch_char = ix86_arch_string[arch_len - 1];
  56   int last_tune_char = ix86_tune_string[tune_len - 1];
  57
  58   /* Built-ins based on -march=.  */
  59   switch (arch)
  60     {
  61     case PROCESSOR_I386:
  62       break;
  63     case PROCESSOR_I486:
  64       def_or_undef (parse_in, "__i486");
  65       def_or_undef (parse_in, "__i486__");
  66       break;
  67     case PROCESSOR_PENTIUM:
  68       def_or_undef (parse_in, "__i586");
  69       def_or_undef (parse_in, "__i586__");
  70       def_or_undef (parse_in, "__pentium");
  71       def_or_undef (parse_in, "__pentium__");
  72       if (isa_flag & OPTION_MASK_ISA_MMX)
  73         def_or_undef (parse_in, "__pentium_mmx__");
  74       break;
  75     case PROCESSOR_PENTIUMPRO:
  76       def_or_undef (parse_in, "__i686");
  77       def_or_undef (parse_in, "__i686__");
  78       def_or_undef (parse_in, "__pentiumpro");
  79       def_or_undef (parse_in, "__pentiumpro__");
  80       break;
  81     case PROCESSOR_GEODE:
  82       def_or_undef (parse_in, "__geode");
  83       def_or_undef (parse_in, "__geode__");
  84       break;
  85     case PROCESSOR_K6:
  86       def_or_undef (parse_in, "__k6");
  87       def_or_undef (parse_in, "__k6__");
  88       if (last_arch_char == '2')
  89         def_or_undef (parse_in, "__k6_2__");
  90       else if (last_arch_char == '3')
  91         def_or_undef (parse_in, "__k6_3__");
  92       else if (isa_flag & OPTION_MASK_ISA_3DNOW)
  93         def_or_undef (parse_in, "__k6_3__");
  94       break;
  95     case PROCESSOR_ATHLON:
  96       def_or_undef (parse_in, "__athlon");
  97       def_or_undef (parse_in, "__athlon__");
  98       if (isa_flag & OPTION_MASK_ISA_SSE)
  99         def_or_undef (parse_in, "__athlon_sse__");
 100       break;
 101     case PROCESSOR_K8:
 102       def_or_undef (parse_in, "__k8");
 103       def_or_undef (parse_in, "__k8__");
 104       break;
 105     case PROCESSOR_AMDFAM10:
 106       def_or_undef (parse_in, "__amdfam10");
 107       def_or_undef (parse_in, "__amdfam10__");
 108       break;
 109     case PROCESSOR_BDVER1:
 110       def_or_undef (parse_in, "__bdver1");
 111       def_or_undef (parse_in, "__bdver1__");
 112       break;
 113     case PROCESSOR_BDVER2:
 114       def_or_undef (parse_in, "__bdver2");
 115       def_or_undef (parse_in, "__bdver2__");
 116       break;
 117     case PROCESSOR_BTVER1:
 118       def_or_undef (parse_in, "__btver1");
 119       def_or_undef (parse_in, "__btver1__");
 120       break;
 121     case PROCESSOR_PENTIUM4:
 122       def_or_undef (parse_in, "__pentium4");
 123       def_or_undef (parse_in, "__pentium4__");
 124       break;
 125     case PROCESSOR_NOCONA:
 126       def_or_undef (parse_in, "__nocona");
 127       def_or_undef (parse_in, "__nocona__");
 128       break;
 129     case PROCESSOR_CORE2_32:
 130     case PROCESSOR_CORE2_64:
 131       def_or_undef (parse_in, "__core2");
 132       def_or_undef (parse_in, "__core2__");
 133       break;
 134     case PROCESSOR_COREI7_32:
 135     case PROCESSOR_COREI7_64:
 136       def_or_undef (parse_in, "__corei7");
 137       def_or_undef (parse_in, "__corei7__");
 138       break;
 139     case PROCESSOR_ATOM:
 140       def_or_undef (parse_in, "__atom");
 141       def_or_undef (parse_in, "__atom__");
 142       break;
 143     /* use PROCESSOR_max to not set/unset the arch macro.  */
 144     case PROCESSOR_max:
 145       break;
 146     case PROCESSOR_GENERIC32:
 147     case PROCESSOR_GENERIC64:
 148       gcc_unreachable ();
 149     }
 150
 151   /* Built-ins based on -mtune=.  */
 152   switch (tune)
 153     {
 154     case PROCESSOR_I386:
 155       def_or_undef (parse_in, "__tune_i386__");
 156       break;
 157     case PROCESSOR_I486:
 158       def_or_undef (parse_in, "__tune_i486__");
 159       break;
 160     case PROCESSOR_PENTIUM:
 161       def_or_undef (parse_in, "__tune_i586__");
 162       def_or_undef (parse_in, "__tune_pentium__");
 163       if (last_tune_char == 'x')
 164         def_or_undef (parse_in, "__tune_pentium_mmx__");
 165       break;
 166     case PROCESSOR_PENTIUMPRO:
 167       def_or_undef (parse_in, "__tune_i686__");
 168       def_or_undef (parse_in, "__tune_pentiumpro__");
 169       switch (last_tune_char)
 170         {
 171         case '3':
 172           def_or_undef (parse_in, "__tune_pentium3__");
 173           /* FALLTHRU */
 174         case '2':
 175           def_or_undef (parse_in, "__tune_pentium2__");
 176           break;
 177         }
 178       break;
 179     case PROCESSOR_GEODE:
 180       def_or_undef (parse_in, "__tune_geode__");
 181       break;
 182     case PROCESSOR_K6:
 183       def_or_undef (parse_in, "__tune_k6__");
 184       if (last_tune_char == '2')
 185         def_or_undef (parse_in, "__tune_k6_2__");
 186       else if (last_tune_char == '3')
 187         def_or_undef (parse_in, "__tune_k6_3__");
 188       else if (isa_flag & OPTION_MASK_ISA_3DNOW)
 189         def_or_undef (parse_in, "__tune_k6_3__");
 190       break;
 191     case PROCESSOR_ATHLON:
 192       def_or_undef (parse_in, "__tune_athlon__");
 193       if (isa_flag & OPTION_MASK_ISA_SSE)
 194         def_or_undef (parse_in, "__tune_athlon_sse__");
 195       break;
 196     case PROCESSOR_K8:
 197       def_or_undef (parse_in, "__tune_k8__");
 198       break;
 199     case PROCESSOR_AMDFAM10:
 200       def_or_undef (parse_in, "__tune_amdfam10__");
 201       break;
 202     case PROCESSOR_BDVER1:
 203       def_or_undef (parse_in, "__tune_bdver1__");
 204       break;
 205     case PROCESSOR_BDVER2:
 206       def_or_undef (parse_in, "__tune_bdver2__");
 207       break;
 208    case PROCESSOR_BTVER1:
 209       def_or_undef (parse_in, "__tune_btver1__");
 210       break;
 211     case PROCESSOR_PENTIUM4:
 212       def_or_undef (parse_in, "__tune_pentium4__");
 213       break;
 214     case PROCESSOR_NOCONA:
 215       def_or_undef (parse_in, "__tune_nocona__");
 216       break;
 217     case PROCESSOR_CORE2_32:
 218     case PROCESSOR_CORE2_64:
 219       def_or_undef (parse_in, "__tune_core2__");
 220       break;
 221     case PROCESSOR_COREI7_32:
 222     case PROCESSOR_COREI7_64:
 223       def_or_undef (parse_in, "__tune_corei7__");
 224       break;
 225     case PROCESSOR_ATOM:
 226       def_or_undef (parse_in, "__tune_atom__");
 227       break;
 228     case PROCESSOR_GENERIC32:
 229     case PROCESSOR_GENERIC64:
 230       break;
 231     /* use PROCESSOR_max to not set/unset the tune macro.  */
 232     case PROCESSOR_max:
 233       break;
 234     }
 235
 236   if (isa_flag & OPTION_MASK_ISA_MMX)
 237     def_or_undef (parse_in, "__MMX__");
 238   if (isa_flag & OPTION_MASK_ISA_3DNOW)
 239     def_or_undef (parse_in, "__3dNOW__");
 240   if (isa_flag & OPTION_MASK_ISA_3DNOW_A)
 241     def_or_undef (parse_in, "__3dNOW_A__");
 242   if (isa_flag & OPTION_MASK_ISA_SSE)
 243     def_or_undef (parse_in, "__SSE__");
 244   if (isa_flag & OPTION_MASK_ISA_SSE2)
 245     def_or_undef (parse_in, "__SSE2__");
 246   if (isa_flag & OPTION_MASK_ISA_SSE3)
 247     def_or_undef (parse_in, "__SSE3__");
 248   if (isa_flag & OPTION_MASK_ISA_SSSE3)
 249     def_or_undef (parse_in, "__SSSE3__");
 250   if (isa_flag & OPTION_MASK_ISA_SSE4_1)
 251     def_or_undef (parse_in, "__SSE4_1__");
 252   if (isa_flag & OPTION_MASK_ISA_SSE4_2)
 253     def_or_undef (parse_in, "__SSE4_2__");
 254   if (isa_flag & OPTION_MASK_ISA_AES)
 255     def_or_undef (parse_in, "__AES__");
 256   if (isa_flag & OPTION_MASK_ISA_PCLMUL)
 257     def_or_undef (parse_in, "__PCLMUL__");
 258   if (isa_flag & OPTION_MASK_ISA_AVX)
 259     def_or_undef (parse_in, "__AVX__");
 260   if (isa_flag & OPTION_MASK_ISA_AVX2)
 261     def_or_undef (parse_in, "__AVX2__");
 262   if (isa_flag & OPTION_MASK_ISA_FMA)
 263     def_or_undef (parse_in, "__FMA__");
 264   if (isa_flag & OPTION_MASK_ISA_RTM)
 265     def_or_undef (parse_in, "__RTM__");
 266   if (isa_flag & OPTION_MASK_ISA_SSE4A)
 267     def_or_undef (parse_in, "__SSE4A__");
 268   if (isa_flag & OPTION_MASK_ISA_FMA4)
 269     def_or_undef (parse_in, "__FMA4__");
 270   if (isa_flag & OPTION_MASK_ISA_XOP)
 271     def_or_undef (parse_in, "__XOP__");
 272   if (isa_flag & OPTION_MASK_ISA_LWP)
 273     def_or_undef (parse_in, "__LWP__");
 274   if (isa_flag & OPTION_MASK_ISA_ABM)
 275     def_or_undef (parse_in, "__ABM__");
 276   if (isa_flag & OPTION_MASK_ISA_BMI)
 277     def_or_undef (parse_in, "__BMI__");
 278   if (isa_flag & OPTION_MASK_ISA_BMI2)
 279     def_or_undef (parse_in, "__BMI2__");
 280   if (isa_flag & OPTION_MASK_ISA_LZCNT)
 281     def_or_undef (parse_in, "__LZCNT__");
 282   if (isa_flag & OPTION_MASK_ISA_TBM)
 283     def_or_undef (parse_in, "__TBM__");
 284   if (isa_flag & OPTION_MASK_ISA_POPCNT)
 285     def_or_undef (parse_in, "__POPCNT__");
 286   if (isa_flag & OPTION_MASK_ISA_FSGSBASE)
 287     def_or_undef (parse_in, "__FSGSBASE__");
 288   if (isa_flag & OPTION_MASK_ISA_RDRND)
 289     def_or_undef (parse_in, "__RDRND__");
 290   if (isa_flag & OPTION_MASK_ISA_F16C)
 291     def_or_undef (parse_in, "__F16C__");
 292   if ((fpmath & FPMATH_SSE) && (isa_flag & OPTION_MASK_ISA_SSE))
 293     def_or_undef (parse_in, "__SSE_MATH__");
 294   if ((fpmath & FPMATH_SSE) && (isa_flag & OPTION_MASK_ISA_SSE2))
 295     def_or_undef (parse_in, "__SSE2_MATH__");
 296 }
 297
 298 \f
 299 /* Hook to validate the current #pragma GCC target and set the state, and
 300    update the macros based on what was changed.  If ARGS is NULL, then
 301    POP_TARGET is used to reset the options.  */
 302
 303 static bool
 304 ix86_pragma_target_parse (tree args, tree pop_target)
 305 {
 306   tree prev_tree = build_target_option_node ();
 307   tree cur_tree;
 308   struct cl_target_option *prev_opt;
 309   struct cl_target_option *cur_opt;
 310   HOST_WIDE_INT prev_isa;
 311   HOST_WIDE_INT cur_isa;
 312   HOST_WIDE_INT diff_isa;
 313   enum processor_type prev_arch;
 314   enum processor_type prev_tune;
 315   enum processor_type cur_arch;
 316   enum processor_type cur_tune;
 317
 318   if (! args)
 319     {
 320       cur_tree = ((pop_target)
 321                   ? pop_target
 322                   : target_option_default_node);
 323       cl_target_option_restore (&global_options,
 324                                 TREE_TARGET_OPTION (cur_tree));
 325     }
 326   else
 327     {
 328       cur_tree = ix86_valid_target_attribute_tree (args);
 329       if (!cur_tree)
 330         return false;
 331     }
 332
 333   target_option_current_node = cur_tree;
 334
 335   /* Figure out the previous/current isa, arch, tune and the differences.  */
 336   prev_opt  = TREE_TARGET_OPTION (prev_tree);
 337   cur_opt   = TREE_TARGET_OPTION (cur_tree);
 338   prev_isa  = prev_opt->x_ix86_isa_flags;
 339   cur_isa   = cur_opt->x_ix86_isa_flags;
 340   diff_isa  = (prev_isa ^ cur_isa);
 341   prev_arch = (enum processor_type) prev_opt->arch;
 342   prev_tune = (enum processor_type) prev_opt->tune;
 343   cur_arch  = (enum processor_type) cur_opt->arch;
 344   cur_tune  = (enum processor_type) cur_opt->tune;
 345
 346   /* If the same processor is used for both previous and current options, don't
 347      change the macros.  */
 348   if (cur_arch == prev_arch)
 349     cur_arch = prev_arch = PROCESSOR_max;
 350
 351   if (cur_tune == prev_tune)
 352     cur_tune = prev_tune = PROCESSOR_max;
 353
 354   /* Undef all of the macros for that are no longer current.  */
 355   ix86_target_macros_internal (prev_isa & diff_isa,
 356                                prev_arch,
 357                                prev_tune,
 358                                (enum fpmath_unit) prev_opt->x_ix86_fpmath,
 359                                cpp_undef);
 360
 361   /* Define all of the macros for new options that were just turned on.  */
 362   ix86_target_macros_internal (cur_isa & diff_isa,
 363                                cur_arch,
 364                                cur_tune,
 365                                (enum fpmath_unit) cur_opt->x_ix86_fpmath,
 366                                cpp_define);
 367
 368   return true;
 369 }
 370 \f
 371 /* Function to tell the preprocessor about the defines for the current target.  */
 372
 373 void
 374 ix86_target_macros (void)
 375 {
 376   /* 32/64-bit won't change with target specific options, so do the assert and
 377      builtin_define_std calls here.  */
 378   if (TARGET_64BIT)
 379     {
 380       cpp_assert (parse_in, "cpu=x86_64");
 381       cpp_assert (parse_in, "machine=x86_64");
 382       cpp_define (parse_in, "__amd64");
 383       cpp_define (parse_in, "__amd64__");
 384       cpp_define (parse_in, "__x86_64");
 385       cpp_define (parse_in, "__x86_64__");
 386     }
 387   else
 388     {
 389       cpp_assert (parse_in, "cpu=i386");
 390       cpp_assert (parse_in, "machine=i386");
 391       builtin_define_std ("i386");
 392     }
 393
 394   ix86_target_macros_internal (ix86_isa_flags,
 395                                ix86_arch,
 396                                ix86_tune,
 397                                ix86_fpmath,
 398                                cpp_define);
 399 }
 400
 401 \f
 402 /* Register target pragmas.  We need to add the hook for parsing #pragma GCC
 403    option here rather than in i386.c since it will pull in various preprocessor
 404    functions, and those are not present in languages like fortran without a
 405    preprocessor.  */
 406
 407 void
 408 ix86_register_pragmas (void)
 409 {
 410   /* Update pragma hook to allow parsing #pragma GCC target.  */
 411   targetm.target_option.pragma_parse = ix86_pragma_target_parse;
 412
 413 #ifdef REGISTER_SUBTARGET_PRAGMAS
 414   REGISTER_SUBTARGET_PRAGMAS ();
 415 #endif
 416 }