gcc-4_8-branch/gcc/common/config/i386/i386-common.c

   1 /* IA-32 common hooks.
   2    Copyright (C) 1988-2013 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 "diagnostic-core.h"
  24 #include "tm.h"
  25 #include "tm_p.h"
  26 #include "common/common-target.h"
  27 #include "common/common-target-def.h"
  28 #include "opts.h"
  29 #include "flags.h"
  30
  31 /* Define a set of ISAs which are available when a given ISA is
  32    enabled.  MMX and SSE ISAs are handled separately.  */
  33
  34 #define OPTION_MASK_ISA_MMX_SET OPTION_MASK_ISA_MMX
  35 #define OPTION_MASK_ISA_3DNOW_SET \
  36   (OPTION_MASK_ISA_3DNOW | OPTION_MASK_ISA_MMX_SET)
  37
  38 #define OPTION_MASK_ISA_SSE_SET OPTION_MASK_ISA_SSE
  39 #define OPTION_MASK_ISA_SSE2_SET \
  40   (OPTION_MASK_ISA_SSE2 | OPTION_MASK_ISA_SSE_SET)
  41 #define OPTION_MASK_ISA_SSE3_SET \
  42   (OPTION_MASK_ISA_SSE3 | OPTION_MASK_ISA_SSE2_SET)
  43 #define OPTION_MASK_ISA_SSSE3_SET \
  44   (OPTION_MASK_ISA_SSSE3 | OPTION_MASK_ISA_SSE3_SET)
  45 #define OPTION_MASK_ISA_SSE4_1_SET \
  46   (OPTION_MASK_ISA_SSE4_1 | OPTION_MASK_ISA_SSSE3_SET)
  47 #define OPTION_MASK_ISA_SSE4_2_SET \
  48   (OPTION_MASK_ISA_SSE4_2 | OPTION_MASK_ISA_SSE4_1_SET)
  49 #define OPTION_MASK_ISA_AVX_SET \
  50   (OPTION_MASK_ISA_AVX | OPTION_MASK_ISA_SSE4_2_SET \
  51    | OPTION_MASK_ISA_XSAVE_SET)
  52 #define OPTION_MASK_ISA_FMA_SET \
  53   (OPTION_MASK_ISA_FMA | OPTION_MASK_ISA_AVX_SET)
  54 #define OPTION_MASK_ISA_AVX2_SET \
  55   (OPTION_MASK_ISA_AVX2 | OPTION_MASK_ISA_AVX_SET)
  56 #define OPTION_MASK_ISA_FXSR_SET OPTION_MASK_ISA_FXSR
  57 #define OPTION_MASK_ISA_XSAVE_SET OPTION_MASK_ISA_XSAVE
  58 #define OPTION_MASK_ISA_XSAVEOPT_SET \
  59   (OPTION_MASK_ISA_XSAVEOPT | OPTION_MASK_ISA_XSAVE)
  60 #define OPTION_MASK_ISA_RTM_SET OPTION_MASK_ISA_RTM
  61 #define OPTION_MASK_ISA_PRFCHW_SET OPTION_MASK_ISA_PRFCHW
  62 #define OPTION_MASK_ISA_RDSEED_SET OPTION_MASK_ISA_RDSEED
  63 #define OPTION_MASK_ISA_ADX_SET OPTION_MASK_ISA_ADX
  64
  65 /* SSE4 includes both SSE4.1 and SSE4.2. -msse4 should be the same
  66    as -msse4.2.  */
  67 #define OPTION_MASK_ISA_SSE4_SET OPTION_MASK_ISA_SSE4_2_SET
  68
  69 #define OPTION_MASK_ISA_SSE4A_SET \
  70   (OPTION_MASK_ISA_SSE4A | OPTION_MASK_ISA_SSE3_SET)
  71 #define OPTION_MASK_ISA_FMA4_SET \
  72   (OPTION_MASK_ISA_FMA4 | OPTION_MASK_ISA_SSE4A_SET \
  73    | OPTION_MASK_ISA_AVX_SET)
  74 #define OPTION_MASK_ISA_XOP_SET \
  75   (OPTION_MASK_ISA_XOP | OPTION_MASK_ISA_FMA4_SET)
  76 #define OPTION_MASK_ISA_LWP_SET \
  77   OPTION_MASK_ISA_LWP
  78
  79 /* AES and PCLMUL need SSE2 because they use xmm registers */
  80 #define OPTION_MASK_ISA_AES_SET \
  81   (OPTION_MASK_ISA_AES | OPTION_MASK_ISA_SSE2_SET)
  82 #define OPTION_MASK_ISA_PCLMUL_SET \
  83   (OPTION_MASK_ISA_PCLMUL | OPTION_MASK_ISA_SSE2_SET)
  84
  85 #define OPTION_MASK_ISA_ABM_SET \
  86   (OPTION_MASK_ISA_ABM | OPTION_MASK_ISA_POPCNT)
  87
  88 #define OPTION_MASK_ISA_BMI_SET OPTION_MASK_ISA_BMI
  89 #define OPTION_MASK_ISA_BMI2_SET OPTION_MASK_ISA_BMI2
  90 #define OPTION_MASK_ISA_TBM_SET OPTION_MASK_ISA_TBM
  91 #define OPTION_MASK_ISA_POPCNT_SET OPTION_MASK_ISA_POPCNT
  92 #define OPTION_MASK_ISA_CX16_SET OPTION_MASK_ISA_CX16
  93 #define OPTION_MASK_ISA_SAHF_SET OPTION_MASK_ISA_SAHF
  94 #define OPTION_MASK_ISA_MOVBE_SET OPTION_MASK_ISA_MOVBE
  95 #define OPTION_MASK_ISA_CRC32_SET OPTION_MASK_ISA_CRC32
  96
  97 #define OPTION_MASK_ISA_FSGSBASE_SET OPTION_MASK_ISA_FSGSBASE
  98 #define OPTION_MASK_ISA_RDRND_SET OPTION_MASK_ISA_RDRND
  99 #define OPTION_MASK_ISA_F16C_SET \
 100   (OPTION_MASK_ISA_F16C | OPTION_MASK_ISA_AVX_SET)
 101
 102 /* Define a set of ISAs which aren't available when a given ISA is
 103    disabled.  MMX and SSE ISAs are handled separately.  */
 104
 105 #define OPTION_MASK_ISA_MMX_UNSET \
 106   (OPTION_MASK_ISA_MMX | OPTION_MASK_ISA_3DNOW_UNSET)
 107 #define OPTION_MASK_ISA_3DNOW_UNSET \
 108   (OPTION_MASK_ISA_3DNOW | OPTION_MASK_ISA_3DNOW_A_UNSET)
 109 #define OPTION_MASK_ISA_3DNOW_A_UNSET OPTION_MASK_ISA_3DNOW_A
 110
 111 #define OPTION_MASK_ISA_SSE_UNSET \
 112   (OPTION_MASK_ISA_SSE | OPTION_MASK_ISA_SSE2_UNSET)
 113 #define OPTION_MASK_ISA_SSE2_UNSET \
 114   (OPTION_MASK_ISA_SSE2 | OPTION_MASK_ISA_SSE3_UNSET)
 115 #define OPTION_MASK_ISA_SSE3_UNSET \
 116   (OPTION_MASK_ISA_SSE3 \
 117    | OPTION_MASK_ISA_SSSE3_UNSET \
 118    | OPTION_MASK_ISA_SSE4A_UNSET )
 119 #define OPTION_MASK_ISA_SSSE3_UNSET \
 120   (OPTION_MASK_ISA_SSSE3 | OPTION_MASK_ISA_SSE4_1_UNSET)
 121 #define OPTION_MASK_ISA_SSE4_1_UNSET \
 122   (OPTION_MASK_ISA_SSE4_1 | OPTION_MASK_ISA_SSE4_2_UNSET)
 123 #define OPTION_MASK_ISA_SSE4_2_UNSET \
 124   (OPTION_MASK_ISA_SSE4_2 | OPTION_MASK_ISA_AVX_UNSET )
 125 #define OPTION_MASK_ISA_AVX_UNSET \
 126   (OPTION_MASK_ISA_AVX | OPTION_MASK_ISA_FMA_UNSET \
 127    | OPTION_MASK_ISA_FMA4_UNSET | OPTION_MASK_ISA_F16C_UNSET \
 128    | OPTION_MASK_ISA_AVX2_UNSET | OPTION_MASK_ISA_XSAVE_UNSET)
 129 #define OPTION_MASK_ISA_FMA_UNSET OPTION_MASK_ISA_FMA
 130 #define OPTION_MASK_ISA_AVX2_UNSET OPTION_MASK_ISA_AVX2
 131 #define OPTION_MASK_ISA_FXSR_UNSET OPTION_MASK_ISA_FXSR
 132 #define OPTION_MASK_ISA_XSAVE_UNSET \
 133   (OPTION_MASK_ISA_XSAVE | OPTION_MASK_ISA_XSAVEOPT_UNSET)
 134 #define OPTION_MASK_ISA_XSAVEOPT_UNSET OPTION_MASK_ISA_XSAVEOPT
 135 #define OPTION_MASK_ISA_RTM_UNSET OPTION_MASK_ISA_RTM
 136 #define OPTION_MASK_ISA_PRFCHW_UNSET OPTION_MASK_ISA_PRFCHW
 137 #define OPTION_MASK_ISA_RDSEED_UNSET OPTION_MASK_ISA_RDSEED
 138 #define OPTION_MASK_ISA_ADX_UNSET OPTION_MASK_ISA_ADX
 139
 140 /* SSE4 includes both SSE4.1 and SSE4.2.  -mno-sse4 should the same
 141    as -mno-sse4.1. */
 142 #define OPTION_MASK_ISA_SSE4_UNSET OPTION_MASK_ISA_SSE4_1_UNSET
 143
 144 #define OPTION_MASK_ISA_SSE4A_UNSET \
 145   (OPTION_MASK_ISA_SSE4A | OPTION_MASK_ISA_FMA4_UNSET)
 146
 147 #define OPTION_MASK_ISA_FMA4_UNSET \
 148   (OPTION_MASK_ISA_FMA4 | OPTION_MASK_ISA_XOP_UNSET)
 149 #define OPTION_MASK_ISA_XOP_UNSET OPTION_MASK_ISA_XOP
 150 #define OPTION_MASK_ISA_LWP_UNSET OPTION_MASK_ISA_LWP
 151
 152 #define OPTION_MASK_ISA_AES_UNSET OPTION_MASK_ISA_AES
 153 #define OPTION_MASK_ISA_PCLMUL_UNSET OPTION_MASK_ISA_PCLMUL
 154 #define OPTION_MASK_ISA_ABM_UNSET OPTION_MASK_ISA_ABM
 155 #define OPTION_MASK_ISA_BMI_UNSET OPTION_MASK_ISA_BMI
 156 #define OPTION_MASK_ISA_BMI2_UNSET OPTION_MASK_ISA_BMI2
 157 #define OPTION_MASK_ISA_TBM_UNSET OPTION_MASK_ISA_TBM
 158 #define OPTION_MASK_ISA_POPCNT_UNSET OPTION_MASK_ISA_POPCNT
 159 #define OPTION_MASK_ISA_CX16_UNSET OPTION_MASK_ISA_CX16
 160 #define OPTION_MASK_ISA_SAHF_UNSET OPTION_MASK_ISA_SAHF
 161 #define OPTION_MASK_ISA_MOVBE_UNSET OPTION_MASK_ISA_MOVBE
 162 #define OPTION_MASK_ISA_CRC32_UNSET OPTION_MASK_ISA_CRC32
 163
 164 #define OPTION_MASK_ISA_FSGSBASE_UNSET OPTION_MASK_ISA_FSGSBASE
 165 #define OPTION_MASK_ISA_RDRND_UNSET OPTION_MASK_ISA_RDRND
 166 #define OPTION_MASK_ISA_F16C_UNSET OPTION_MASK_ISA_F16C
 167
 168 /* Implement TARGET_HANDLE_OPTION.  */
 169
 170 bool
 171 ix86_handle_option (struct gcc_options *opts,
 172                     struct gcc_options *opts_set ATTRIBUTE_UNUSED,
 173                     const struct cl_decoded_option *decoded,
 174                     location_t loc)
 175 {
 176   size_t code = decoded->opt_index;
 177   int value = decoded->value;
 178
 179   switch (code)
 180     {
 181     case OPT_mmmx:
 182       if (value)
 183         {
 184           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_MMX_SET;
 185           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_MMX_SET;
 186         }
 187       else
 188         {
 189           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_MMX_UNSET;
 190           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_MMX_UNSET;
 191         }
 192       return true;
 193
 194     case OPT_m3dnow:
 195       if (value)
 196         {
 197           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_3DNOW_SET;
 198           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_3DNOW_SET;
 199         }
 200       else
 201         {
 202           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_3DNOW_UNSET;
 203           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_3DNOW_UNSET;
 204         }
 205       return true;
 206
 207     case OPT_m3dnowa:
 208       return false;
 209
 210     case OPT_msse:
 211       if (value)
 212         {
 213           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSE_SET;
 214           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE_SET;
 215         }
 216       else
 217         {
 218           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_SSE_UNSET;
 219           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE_UNSET;
 220         }
 221       return true;
 222
 223     case OPT_msse2:
 224       if (value)
 225         {
 226           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSE2_SET;
 227           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE2_SET;
 228         }
 229       else
 230         {
 231           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_SSE2_UNSET;
 232           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE2_UNSET;
 233         }
 234       return true;
 235
 236     case OPT_msse3:
 237       if (value)
 238         {
 239           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSE3_SET;
 240           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE3_SET;
 241         }
 242       else
 243         {
 244           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_SSE3_UNSET;
 245           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE3_UNSET;
 246         }
 247       return true;
 248
 249     case OPT_mssse3:
 250       if (value)
 251         {
 252           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSSE3_SET;
 253           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSSE3_SET;
 254         }
 255       else
 256         {
 257           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_SSSE3_UNSET;
 258           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSSE3_UNSET;
 259         }
 260       return true;
 261
 262     case OPT_msse4_1:
 263       if (value)
 264         {
 265           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSE4_1_SET;
 266           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE4_1_SET;
 267         }
 268       else
 269         {
 270           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_SSE4_1_UNSET;
 271           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE4_1_UNSET;
 272         }
 273       return true;
 274
 275     case OPT_msse4_2:
 276       if (value)
 277         {
 278           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSE4_2_SET;
 279           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE4_2_SET;
 280         }
 281       else
 282         {
 283           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_SSE4_2_UNSET;
 284           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE4_2_UNSET;
 285         }
 286       return true;
 287
 288     case OPT_mavx:
 289       if (value)
 290         {
 291           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX_SET;
 292           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX_SET;
 293         }
 294       else
 295         {
 296           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_AVX_UNSET;
 297           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX_UNSET;
 298         }
 299       return true;
 300
 301     case OPT_mavx2:
 302       if (value)
 303         {
 304           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX2_SET;
 305           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX2_SET;
 306         }
 307       else
 308         {
 309           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_AVX2_UNSET;
 310           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX2_UNSET;
 311         }
 312       return true;
 313
 314     case OPT_mfma:
 315       if (value)
 316         {
 317           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_FMA_SET;
 318           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_FMA_SET;
 319         }
 320       else
 321         {
 322           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_FMA_UNSET;
 323           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_FMA_UNSET;
 324         }
 325       return true;
 326
 327     case OPT_mrtm:
 328       if (value)
 329         {
 330           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_RTM_SET;
 331           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_RTM_SET;
 332         }
 333       else
 334         {
 335           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_RTM_UNSET;
 336           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_RTM_UNSET;
 337         }
 338       return true;
 339
 340     case OPT_msse4:
 341       opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSE4_SET;
 342       opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE4_SET;
 343       return true;
 344
 345     case OPT_mno_sse4:
 346       opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_SSE4_UNSET;
 347       opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE4_UNSET;
 348       return true;
 349
 350     case OPT_msse4a:
 351       if (value)
 352         {
 353           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSE4A_SET;
 354           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE4A_SET;
 355         }
 356       else
 357         {
 358           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_SSE4A_UNSET;
 359           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE4A_UNSET;
 360         }
 361       return true;
 362
 363     case OPT_mfma4:
 364       if (value)
 365         {
 366           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_FMA4_SET;
 367           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_FMA4_SET;
 368         }
 369       else
 370         {
 371           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_FMA4_UNSET;
 372           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_FMA4_UNSET;
 373         }
 374       return true;
 375
 376    case OPT_mxop:
 377       if (value)
 378         {
 379           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_XOP_SET;
 380           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_XOP_SET;
 381         }
 382       else
 383         {
 384           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_XOP_UNSET;
 385           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_XOP_UNSET;
 386         }
 387       return true;
 388
 389    case OPT_mlwp:
 390       if (value)
 391         {
 392           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_LWP_SET;
 393           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_LWP_SET;
 394         }
 395       else
 396         {
 397           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_LWP_UNSET;
 398           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_LWP_UNSET;
 399         }
 400       return true;
 401
 402     case OPT_mabm:
 403       if (value)
 404         {
 405           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_ABM_SET;
 406           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_ABM_SET;
 407         }
 408       else
 409         {
 410           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_ABM_UNSET;
 411           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_ABM_UNSET;
 412         }
 413       return true;
 414
 415     case OPT_mbmi:
 416       if (value)
 417         {
 418           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_BMI_SET;
 419           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_BMI_SET;
 420         }
 421       else
 422         {
 423           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_BMI_UNSET;
 424           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_BMI_UNSET;
 425         }
 426       return true;
 427
 428     case OPT_mbmi2:
 429       if (value)
 430         {
 431           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_BMI2_SET;
 432           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_BMI2_SET;
 433         }
 434       else
 435         {
 436           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_BMI2_UNSET;
 437           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_BMI2_UNSET;
 438         }
 439       return true;
 440
 441     case OPT_mtbm:
 442       if (value)
 443         {
 444           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_TBM_SET;
 445           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_TBM_SET;
 446         }
 447       else
 448         {
 449           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_TBM_UNSET;
 450           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_TBM_UNSET;
 451         }
 452       return true;
 453
 454     case OPT_mpopcnt:
 455       if (value)
 456         {
 457           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_POPCNT_SET;
 458           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_POPCNT_SET;
 459         }
 460       else
 461         {
 462           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_POPCNT_UNSET;
 463           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_POPCNT_UNSET;
 464         }
 465       return true;
 466
 467     case OPT_msahf:
 468       if (value)
 469         {
 470           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SAHF_SET;
 471           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SAHF_SET;
 472         }
 473       else
 474         {
 475           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_SAHF_UNSET;
 476           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SAHF_UNSET;
 477         }
 478       return true;
 479
 480     case OPT_mcx16:
 481       if (value)
 482         {
 483           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_CX16_SET;
 484           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_CX16_SET;
 485         }
 486       else
 487         {
 488           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_CX16_UNSET;
 489           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_CX16_UNSET;
 490         }
 491       return true;
 492
 493     case OPT_mmovbe:
 494       if (value)
 495         {
 496           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_MOVBE_SET;
 497           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_MOVBE_SET;
 498         }
 499       else
 500         {
 501           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_MOVBE_UNSET;
 502           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_MOVBE_UNSET;
 503         }
 504       return true;
 505
 506     case OPT_mcrc32:
 507       if (value)
 508         {
 509           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_CRC32_SET;
 510           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_CRC32_SET;
 511         }
 512       else
 513         {
 514           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_CRC32_UNSET;
 515           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_CRC32_UNSET;
 516         }
 517       return true;
 518
 519     case OPT_maes:
 520       if (value)
 521         {
 522           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AES_SET;
 523           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AES_SET;
 524         }
 525       else
 526         {
 527           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_AES_UNSET;
 528           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AES_UNSET;
 529         }
 530       return true;
 531
 532     case OPT_mpclmul:
 533       if (value)
 534         {
 535           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_PCLMUL_SET;
 536           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_PCLMUL_SET;
 537         }
 538       else
 539         {
 540           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_PCLMUL_UNSET;
 541           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_PCLMUL_UNSET;
 542         }
 543       return true;
 544
 545     case OPT_mfsgsbase:
 546       if (value)
 547         {
 548           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_FSGSBASE_SET;
 549           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_FSGSBASE_SET;
 550         }
 551       else
 552         {
 553           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_FSGSBASE_UNSET;
 554           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_FSGSBASE_UNSET;
 555         }
 556       return true;
 557
 558     case OPT_mrdrnd:
 559       if (value)
 560         {
 561           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_RDRND_SET;
 562           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_RDRND_SET;
 563         }
 564       else
 565         {
 566           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_RDRND_UNSET;
 567           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_RDRND_UNSET;
 568         }
 569       return true;
 570
 571     case OPT_mf16c:
 572       if (value)
 573         {
 574           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_F16C_SET;
 575           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_F16C_SET;
 576         }
 577       else
 578         {
 579           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_F16C_UNSET;
 580           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_F16C_UNSET;
 581         }
 582       return true;
 583
 584     case OPT_mfxsr:
 585       if (value)
 586         {
 587           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_FXSR_SET;
 588           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_FXSR_SET;
 589         }
 590       else
 591         {
 592           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_FXSR_UNSET;
 593           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_FXSR_UNSET;
 594         }
 595       return true;
 596
 597     case OPT_mxsave:
 598       if (value)
 599         {
 600           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_XSAVE_SET;
 601           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_XSAVE_SET;
 602         }
 603       else
 604         {
 605           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_XSAVE_UNSET;
 606           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_XSAVE_UNSET;
 607         }
 608       return true;
 609
 610     case OPT_mxsaveopt:
 611       if (value)
 612         {
 613           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_XSAVEOPT_SET;
 614           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_XSAVEOPT_SET;
 615         }
 616       else
 617         {
 618           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_XSAVEOPT_UNSET;
 619           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_XSAVEOPT_UNSET;
 620         }
 621       return true;
 622
 623     case OPT_mrdseed:
 624       if (value)
 625         {
 626           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_RDSEED_SET;
 627           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_RDSEED_SET;
 628         }
 629       else
 630         {
 631           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_RDSEED_UNSET;
 632           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_RDSEED_UNSET;
 633         }
 634       return true;
 635
 636     case OPT_mprfchw:
 637       if (value)
 638         {
 639           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_PRFCHW_SET;
 640           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_PRFCHW_SET;
 641         }
 642       else
 643         {
 644           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_PRFCHW_UNSET;
 645           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_PRFCHW_UNSET;
 646         }
 647       return true;
 648
 649     case OPT_madx:
 650       if (value)
 651         {
 652           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_ADX_SET;
 653           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_ADX_SET;
 654         }
 655       else
 656         {
 657           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_ADX_UNSET;
 658           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_ADX_UNSET;
 659         }
 660       return true;
 661
 662   /* Comes from final.c -- no real reason to change it.  */
 663 #define MAX_CODE_ALIGN 16
 664
 665     case OPT_malign_loops_:
 666       warning_at (loc, 0, "-malign-loops is obsolete, use -falign-loops");
 667       if (value > MAX_CODE_ALIGN)
 668         error_at (loc, "-malign-loops=%d is not between 0 and %d",
 669                   value, MAX_CODE_ALIGN);
 670       else
 671         opts->x_align_loops = 1 << value;
 672       return true;
 673
 674     case OPT_malign_jumps_:
 675       warning_at (loc, 0, "-malign-jumps is obsolete, use -falign-jumps");
 676       if (value > MAX_CODE_ALIGN)
 677         error_at (loc, "-malign-jumps=%d is not between 0 and %d",
 678                   value, MAX_CODE_ALIGN);
 679       else
 680         opts->x_align_jumps = 1 << value;
 681       return true;
 682
 683     case OPT_malign_functions_:
 684       warning_at (loc, 0,
 685                   "-malign-functions is obsolete, use -falign-functions");
 686       if (value > MAX_CODE_ALIGN)
 687         error_at (loc, "-malign-functions=%d is not between 0 and %d",
 688                   value, MAX_CODE_ALIGN);
 689       else
 690         opts->x_align_functions = 1 << value;
 691       return true;
 692
 693     case OPT_mbranch_cost_:
 694       if (value > 5)
 695         {
 696           error_at (loc, "-mbranch-cost=%d is not between 0 and 5", value);
 697           opts->x_ix86_branch_cost = 5;
 698         }
 699       return true;
 700
 701     default:
 702       return true;
 703     }
 704 }
 705
 706 static const struct default_options ix86_option_optimization_table[] =
 707   {
 708     /* Enable redundant extension instructions removal at -O2 and higher.  */
 709     { OPT_LEVELS_2_PLUS, OPT_free, NULL, 1 },
 710     /* Turn off -fschedule-insns by default.  It tends to make the
 711        problem with not enough registers even worse.  */
 712     { OPT_LEVELS_ALL, OPT_fschedule_insns, NULL, 0 },
 713
 714 #ifdef SUBTARGET_OPTIMIZATION_OPTIONS
 715     SUBTARGET_OPTIMIZATION_OPTIONS,
 716 #endif
 717     { OPT_LEVELS_NONE, 0, NULL, 0 }
 718   };
 719
 720 /* Implement TARGET_OPTION_INIT_STRUCT.  */
 721
 722 static void
 723 ix86_option_init_struct (struct gcc_options *opts)
 724 {
 725   if (TARGET_MACHO)
 726     /* The Darwin libraries never set errno, so we might as well
 727        avoid calling them when that's the only reason we would.  */
 728     opts->x_flag_errno_math = 0;
 729
 730   opts->x_flag_pcc_struct_return = 2;
 731   opts->x_flag_asynchronous_unwind_tables = 2;
 732 }
 733
 734 /* On the x86 -fsplit-stack and -fstack-protector both use the same
 735    field in the TCB, so they can not be used together.  */
 736
 737 static bool
 738 ix86_supports_split_stack (bool report ATTRIBUTE_UNUSED,
 739                            struct gcc_options *opts ATTRIBUTE_UNUSED)
 740 {
 741   bool ret = true;
 742
 743 #ifndef TARGET_THREAD_SPLIT_STACK_OFFSET
 744   if (report)
 745     error ("%<-fsplit-stack%> currently only supported on GNU/Linux");
 746   ret = false;
 747 #else
 748   if (!HAVE_GAS_CFI_PERSONALITY_DIRECTIVE)
 749     {
 750       if (report)
 751         error ("%<-fsplit-stack%> requires "
 752                "assembler support for CFI directives");
 753       ret = false;
 754     }
 755 #endif
 756
 757   return ret;
 758 }
 759
 760 /* Implement TARGET_EXCEPT_UNWIND_INFO.  */
 761
 762 static enum unwind_info_type
 763 i386_except_unwind_info (struct gcc_options *opts)
 764 {
 765   /* Honor the --enable-sjlj-exceptions configure switch.  */
 766 #ifdef CONFIG_SJLJ_EXCEPTIONS
 767   if (CONFIG_SJLJ_EXCEPTIONS)
 768     return UI_SJLJ;
 769 #endif
 770
 771   /* On windows 64, prefer SEH exceptions over anything else.  */
 772   if (TARGET_64BIT && DEFAULT_ABI == MS_ABI && opts->x_flag_unwind_tables)
 773     return UI_SEH;
 774
 775   if (DWARF2_UNWIND_INFO)
 776     return UI_DWARF2;
 777
 778   return UI_SJLJ;
 779 }
 780
 781 #undef  TARGET_EXCEPT_UNWIND_INFO
 782 #define TARGET_EXCEPT_UNWIND_INFO  i386_except_unwind_info
 783
 784 #undef TARGET_DEFAULT_TARGET_FLAGS
 785 #define TARGET_DEFAULT_TARGET_FLAGS     \
 786   (TARGET_DEFAULT                       \
 787    | TARGET_SUBTARGET_DEFAULT           \
 788    | TARGET_TLS_DIRECT_SEG_REFS_DEFAULT)
 789
 790 #undef TARGET_HANDLE_OPTION
 791 #define TARGET_HANDLE_OPTION ix86_handle_option
 792
 793 #undef TARGET_OPTION_OPTIMIZATION_TABLE
 794 #define TARGET_OPTION_OPTIMIZATION_TABLE ix86_option_optimization_table
 795 #undef TARGET_OPTION_INIT_STRUCT
 796 #define TARGET_OPTION_INIT_STRUCT ix86_option_init_struct
 797
 798 #undef TARGET_SUPPORTS_SPLIT_STACK
 799 #define TARGET_SUPPORTS_SPLIT_STACK ix86_supports_split_stack
 800
 801 struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;