gcc/config/i386/i386-c.c

   1 /* Subroutines used for macro/preprocessor support on the ia-32.
   2    Copyright (C) 2008, 2009
   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   (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 (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_PENTIUM4:
 114       def_or_undef (parse_in, "__pentium4");
 115       def_or_undef (parse_in, "__pentium4__");
 116       break;
 117     case PROCESSOR_NOCONA:
 118       def_or_undef (parse_in, "__nocona");
 119       def_or_undef (parse_in, "__nocona__");
 120       break;
 121     case PROCESSOR_CORE2:
 122       def_or_undef (parse_in, "__core2");
 123       def_or_undef (parse_in, "__core2__");
 124       break;
 125     case PROCESSOR_ATOM:
 126       def_or_undef (parse_in, "__atom");
 127       def_or_undef (parse_in, "__atom__");
 128       break;
 129     /* use PROCESSOR_max to not set/unset the arch macro.  */
 130     case PROCESSOR_max:
 131       break;
 132     case PROCESSOR_GENERIC32:
 133     case PROCESSOR_GENERIC64:
 134       gcc_unreachable ();
 135     }
 136
 137   /* Built-ins based on -mtune=.  */
 138   switch (tune)
 139     {
 140     case PROCESSOR_I386:
 141       def_or_undef (parse_in, "__tune_i386__");
 142       break;
 143     case PROCESSOR_I486:
 144       def_or_undef (parse_in, "__tune_i486__");
 145       break;
 146     case PROCESSOR_PENTIUM:
 147       def_or_undef (parse_in, "__tune_i586__");
 148       def_or_undef (parse_in, "__tune_pentium__");
 149       if (last_tune_char == 'x')
 150         def_or_undef (parse_in, "__tune_pentium_mmx__");
 151       break;
 152     case PROCESSOR_PENTIUMPRO:
 153       def_or_undef (parse_in, "__tune_i686__");
 154       def_or_undef (parse_in, "__tune_pentiumpro__");
 155       switch (last_tune_char)
 156         {
 157         case '3':
 158           def_or_undef (parse_in, "__tune_pentium3__");
 159           /* FALLTHRU */
 160         case '2':
 161           def_or_undef (parse_in, "__tune_pentium2__");
 162           break;
 163         }
 164       break;
 165     case PROCESSOR_GEODE:
 166       def_or_undef (parse_in, "__tune_geode__");
 167       break;
 168     case PROCESSOR_K6:
 169       def_or_undef (parse_in, "__tune_k6__");
 170       if (last_tune_char == '2')
 171         def_or_undef (parse_in, "__tune_k6_2__");
 172       else if (last_tune_char == '3')
 173         def_or_undef (parse_in, "__tune_k6_3__");
 174       else if (isa_flag & OPTION_MASK_ISA_3DNOW)
 175         def_or_undef (parse_in, "__tune_k6_3__");
 176       break;
 177     case PROCESSOR_ATHLON:
 178       def_or_undef (parse_in, "__tune_athlon__");
 179       if (isa_flag & OPTION_MASK_ISA_SSE)
 180         def_or_undef (parse_in, "__tune_athlon_sse__");
 181       break;
 182     case PROCESSOR_K8:
 183       def_or_undef (parse_in, "__tune_k8__");
 184       break;
 185     case PROCESSOR_AMDFAM10:
 186       def_or_undef (parse_in, "__tune_amdfam10__");
 187       break;
 188     case PROCESSOR_BDVER1:
 189       def_or_undef (parse_in, "__tune_bdver1__");
 190       break;
 191     case PROCESSOR_PENTIUM4:
 192       def_or_undef (parse_in, "__tune_pentium4__");
 193       break;
 194     case PROCESSOR_NOCONA:
 195       def_or_undef (parse_in, "__tune_nocona__");
 196       break;
 197     case PROCESSOR_CORE2:
 198       def_or_undef (parse_in, "__tune_core2__");
 199       break;
 200     case PROCESSOR_ATOM:
 201       def_or_undef (parse_in, "__tune_atom__");
 202       break;
 203     case PROCESSOR_GENERIC32:
 204     case PROCESSOR_GENERIC64:
 205       break;
 206     /* use PROCESSOR_max to not set/unset the tune macro.  */
 207     case PROCESSOR_max:
 208       break;
 209     }
 210
 211   if (isa_flag & OPTION_MASK_ISA_MMX)
 212     def_or_undef (parse_in, "__MMX__");
 213   if (isa_flag & OPTION_MASK_ISA_3DNOW)
 214     def_or_undef (parse_in, "__3dNOW__");
 215   if (isa_flag & OPTION_MASK_ISA_3DNOW_A)
 216     def_or_undef (parse_in, "__3dNOW_A__");
 217   if (isa_flag & OPTION_MASK_ISA_SSE)
 218     def_or_undef (parse_in, "__SSE__");
 219   if (isa_flag & OPTION_MASK_ISA_SSE2)
 220     def_or_undef (parse_in, "__SSE2__");
 221   if (isa_flag & OPTION_MASK_ISA_SSE3)
 222     def_or_undef (parse_in, "__SSE3__");
 223   if (isa_flag & OPTION_MASK_ISA_SSSE3)
 224     def_or_undef (parse_in, "__SSSE3__");
 225   if (isa_flag & OPTION_MASK_ISA_SSE4_1)
 226     def_or_undef (parse_in, "__SSE4_1__");
 227   if (isa_flag & OPTION_MASK_ISA_SSE4_2)
 228     def_or_undef (parse_in, "__SSE4_2__");
 229   if (isa_flag & OPTION_MASK_ISA_AES)
 230     def_or_undef (parse_in, "__AES__");
 231   if (isa_flag & OPTION_MASK_ISA_PCLMUL)
 232     def_or_undef (parse_in, "__PCLMUL__");
 233   if (isa_flag & OPTION_MASK_ISA_AVX)
 234     def_or_undef (parse_in, "__AVX__");
 235   if (isa_flag & OPTION_MASK_ISA_FMA)
 236     def_or_undef (parse_in, "__FMA__");
 237   if (isa_flag & OPTION_MASK_ISA_SSE4A)
 238     def_or_undef (parse_in, "__SSE4A__");
 239   if (isa_flag & OPTION_MASK_ISA_FMA4)
 240     def_or_undef (parse_in, "__FMA4__");
 241   if (isa_flag & OPTION_MASK_ISA_XOP)
 242     def_or_undef (parse_in, "__XOP__");
 243   if (isa_flag & OPTION_MASK_ISA_LWP)
 244     def_or_undef (parse_in, "__LWP__");
 245   if (isa_flag & OPTION_MASK_ISA_ABM)
 246     def_or_undef (parse_in, "__ABM__");
 247   if (isa_flag & OPTION_MASK_ISA_POPCNT)
 248     def_or_undef (parse_in, "__POPCNT__");
 249   if ((fpmath & FPMATH_SSE) && (isa_flag & OPTION_MASK_ISA_SSE))
 250     def_or_undef (parse_in, "__SSE_MATH__");
 251   if ((fpmath & FPMATH_SSE) && (isa_flag & OPTION_MASK_ISA_SSE2))
 252     def_or_undef (parse_in, "__SSE2_MATH__");
 253 }
 254
 255 \f
 256 /* Hook to validate the current #pragma GCC target and set the state, and
 257    update the macros based on what was changed.  If ARGS is NULL, then
 258    POP_TARGET is used to reset the options.  */
 259
 260 static bool
 261 ix86_pragma_target_parse (tree args, tree pop_target)
 262 {
 263   tree prev_tree = build_target_option_node ();
 264   tree cur_tree;
 265   struct cl_target_option *prev_opt;
 266   struct cl_target_option *cur_opt;
 267   int prev_isa;
 268   int cur_isa;
 269   int diff_isa;
 270   enum processor_type prev_arch;
 271   enum processor_type prev_tune;
 272   enum processor_type cur_arch;
 273   enum processor_type cur_tune;
 274
 275   if (! args)
 276     {
 277       cur_tree = ((pop_target)
 278                   ? pop_target
 279                   : target_option_default_node);
 280       cl_target_option_restore (TREE_TARGET_OPTION (cur_tree));
 281     }
 282   else
 283     {
 284       cur_tree = ix86_valid_target_attribute_tree (args);
 285       if (!cur_tree)
 286         return false;
 287     }
 288
 289   target_option_current_node = cur_tree;
 290
 291   /* Figure out the previous/current isa, arch, tune and the differences.  */
 292   prev_opt  = TREE_TARGET_OPTION (prev_tree);
 293   cur_opt   = TREE_TARGET_OPTION (cur_tree);
 294   prev_isa  = prev_opt->ix86_isa_flags;
 295   cur_isa   = cur_opt->ix86_isa_flags;
 296   diff_isa  = (prev_isa ^ cur_isa);
 297   prev_arch = (enum processor_type) prev_opt->arch;
 298   prev_tune = (enum processor_type) prev_opt->tune;
 299   cur_arch  = (enum processor_type) cur_opt->arch;
 300   cur_tune  = (enum processor_type) cur_opt->tune;
 301
 302   /* If the same processor is used for both previous and current options, don't
 303      change the macros.  */
 304   if (cur_arch == prev_arch)
 305     cur_arch = prev_arch = PROCESSOR_max;
 306
 307   if (cur_tune == prev_tune)
 308     cur_tune = prev_tune = PROCESSOR_max;
 309
 310   /* Undef all of the macros for that are no longer current.  */
 311   ix86_target_macros_internal (prev_isa & diff_isa,
 312                                prev_arch,
 313                                prev_tune,
 314                                (enum fpmath_unit) prev_opt->fpmath,
 315                                cpp_undef);
 316
 317   /* Define all of the macros for new options that were just turned on.  */
 318   ix86_target_macros_internal (cur_isa & diff_isa,
 319                                cur_arch,
 320                                cur_tune,
 321                                (enum fpmath_unit) cur_opt->fpmath,
 322                                cpp_define);
 323
 324   return true;
 325 }
 326 \f
 327 /* Function to tell the preprocessor about the defines for the current target.  */
 328
 329 void
 330 ix86_target_macros (void)
 331 {
 332   /* 32/64-bit won't change with target specific options, so do the assert and
 333      builtin_define_std calls here.  */
 334   if (TARGET_64BIT)
 335     {
 336       cpp_assert (parse_in, "cpu=x86_64");
 337       cpp_assert (parse_in, "machine=x86_64");
 338       cpp_define (parse_in, "__amd64");
 339       cpp_define (parse_in, "__amd64__");
 340       cpp_define (parse_in, "__x86_64");
 341       cpp_define (parse_in, "__x86_64__");
 342     }
 343   else
 344     {
 345       cpp_assert (parse_in, "cpu=i386");
 346       cpp_assert (parse_in, "machine=i386");
 347       builtin_define_std ("i386");
 348     }
 349
 350   ix86_target_macros_internal (ix86_isa_flags,
 351                                ix86_arch,
 352                                ix86_tune,
 353                                ix86_fpmath,
 354                                cpp_define);
 355 }
 356
 357 \f
 358 /* Register target pragmas.  We need to add the hook for parsing #pragma GCC
 359    option here rather than in i386.c since it will pull in various preprocessor
 360    functions, and those are not present in languages like fortran without a
 361    preprocessor.  */
 362
 363 void
 364 ix86_register_pragmas (void)
 365 {
 366   /* Update pragma hook to allow parsing #pragma GCC target.  */
 367   targetm.target_option.pragma_parse = ix86_pragma_target_parse;
 368
 369 #ifdef REGISTER_SUBTARGET_PRAGMAS
 370   REGISTER_SUBTARGET_PRAGMAS ();
 371 #endif
 372 }