gcc/common/config/i386/i386-common.c

   1 /* IA-32 common hooks.
   2    Copyright (C) 1988-2018 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 "memmodel.h"
  26 #include "tm_p.h"
  27 #include "common/common-target.h"
  28 #include "common/common-target-def.h"
  29 #include "opts.h"
  30 #include "flags.h"
  31
  32 /* Define a set of ISAs which are available when a given ISA is
  33    enabled.  MMX and SSE ISAs are handled separately.  */
  34
  35 #define OPTION_MASK_ISA_MMX_SET OPTION_MASK_ISA_MMX
  36 #define OPTION_MASK_ISA_3DNOW_SET \
  37   (OPTION_MASK_ISA_3DNOW | OPTION_MASK_ISA_MMX_SET)
  38 #define OPTION_MASK_ISA_3DNOW_A_SET \
  39   (OPTION_MASK_ISA_3DNOW_A | OPTION_MASK_ISA_3DNOW_SET)
  40
  41 #define OPTION_MASK_ISA_SSE_SET OPTION_MASK_ISA_SSE
  42 #define OPTION_MASK_ISA_SSE2_SET \
  43   (OPTION_MASK_ISA_SSE2 | OPTION_MASK_ISA_SSE_SET)
  44 #define OPTION_MASK_ISA_SSE3_SET \
  45   (OPTION_MASK_ISA_SSE3 | OPTION_MASK_ISA_SSE2_SET)
  46 #define OPTION_MASK_ISA_SSSE3_SET \
  47   (OPTION_MASK_ISA_SSSE3 | OPTION_MASK_ISA_SSE3_SET)
  48 #define OPTION_MASK_ISA_SSE4_1_SET \
  49   (OPTION_MASK_ISA_SSE4_1 | OPTION_MASK_ISA_SSSE3_SET)
  50 #define OPTION_MASK_ISA_SSE4_2_SET \
  51   (OPTION_MASK_ISA_SSE4_2 | OPTION_MASK_ISA_SSE4_1_SET)
  52 #define OPTION_MASK_ISA_AVX_SET \
  53   (OPTION_MASK_ISA_AVX | OPTION_MASK_ISA_SSE4_2_SET \
  54    | OPTION_MASK_ISA_XSAVE_SET)
  55 #define OPTION_MASK_ISA_FMA_SET \
  56   (OPTION_MASK_ISA_FMA | OPTION_MASK_ISA_AVX_SET)
  57 #define OPTION_MASK_ISA_AVX2_SET \
  58   (OPTION_MASK_ISA_AVX2 | OPTION_MASK_ISA_AVX_SET)
  59 #define OPTION_MASK_ISA_FXSR_SET OPTION_MASK_ISA_FXSR
  60 #define OPTION_MASK_ISA_XSAVE_SET OPTION_MASK_ISA_XSAVE
  61 #define OPTION_MASK_ISA_XSAVEOPT_SET \
  62   (OPTION_MASK_ISA_XSAVEOPT | OPTION_MASK_ISA_XSAVE)
  63 #define OPTION_MASK_ISA_AVX512F_SET \
  64   (OPTION_MASK_ISA_AVX512F | OPTION_MASK_ISA_AVX2_SET)
  65 #define OPTION_MASK_ISA_AVX512CD_SET \
  66   (OPTION_MASK_ISA_AVX512CD | OPTION_MASK_ISA_AVX512F_SET)
  67 #define OPTION_MASK_ISA_AVX512PF_SET \
  68   (OPTION_MASK_ISA_AVX512PF | OPTION_MASK_ISA_AVX512F_SET)
  69 #define OPTION_MASK_ISA_AVX512ER_SET \
  70   (OPTION_MASK_ISA_AVX512ER | OPTION_MASK_ISA_AVX512F_SET)
  71 #define OPTION_MASK_ISA_AVX512DQ_SET \
  72   (OPTION_MASK_ISA_AVX512DQ | OPTION_MASK_ISA_AVX512F_SET)
  73 #define OPTION_MASK_ISA_AVX512BW_SET \
  74   (OPTION_MASK_ISA_AVX512BW | OPTION_MASK_ISA_AVX512F_SET)
  75 #define OPTION_MASK_ISA_AVX512VL_SET \
  76   (OPTION_MASK_ISA_AVX512VL | OPTION_MASK_ISA_AVX512F_SET)
  77 #define OPTION_MASK_ISA_AVX512IFMA_SET \
  78   (OPTION_MASK_ISA_AVX512IFMA | OPTION_MASK_ISA_AVX512F_SET)
  79 #define OPTION_MASK_ISA_AVX512VBMI_SET \
  80   (OPTION_MASK_ISA_AVX512VBMI | OPTION_MASK_ISA_AVX512BW_SET)
  81 #define OPTION_MASK_ISA_AVX5124FMAPS_SET OPTION_MASK_ISA_AVX5124FMAPS
  82 #define OPTION_MASK_ISA_AVX5124VNNIW_SET OPTION_MASK_ISA_AVX5124VNNIW
  83 #define OPTION_MASK_ISA_AVX512VBMI2_SET \
  84   (OPTION_MASK_ISA_AVX512VBMI2 | OPTION_MASK_ISA_AVX512F_SET)
  85 #define OPTION_MASK_ISA_AVX512VNNI_SET \
  86   (OPTION_MASK_ISA_AVX512VNNI | OPTION_MASK_ISA_AVX512F_SET)
  87 #define OPTION_MASK_ISA_AVX512VPOPCNTDQ_SET \
  88   (OPTION_MASK_ISA_AVX512VPOPCNTDQ | OPTION_MASK_ISA_AVX512F_SET)
  89 #define OPTION_MASK_ISA_AVX512BITALG_SET \
  90   (OPTION_MASK_ISA_AVX512BITALG | OPTION_MASK_ISA_AVX512F_SET)
  91 #define OPTION_MASK_ISA_RTM_SET OPTION_MASK_ISA_RTM
  92 #define OPTION_MASK_ISA_PRFCHW_SET OPTION_MASK_ISA_PRFCHW
  93 #define OPTION_MASK_ISA_RDSEED_SET OPTION_MASK_ISA_RDSEED
  94 #define OPTION_MASK_ISA_ADX_SET OPTION_MASK_ISA_ADX
  95 #define OPTION_MASK_ISA_PREFETCHWT1_SET OPTION_MASK_ISA_PREFETCHWT1
  96 #define OPTION_MASK_ISA_CLFLUSHOPT_SET OPTION_MASK_ISA_CLFLUSHOPT
  97 #define OPTION_MASK_ISA_XSAVES_SET \
  98   (OPTION_MASK_ISA_XSAVES | OPTION_MASK_ISA_XSAVE)
  99 #define OPTION_MASK_ISA_XSAVEC_SET \
 100   (OPTION_MASK_ISA_XSAVEC | OPTION_MASK_ISA_XSAVE)
 101 #define OPTION_MASK_ISA_CLWB_SET OPTION_MASK_ISA_CLWB
 102
 103 /* SSE4 includes both SSE4.1 and SSE4.2. -msse4 should be the same
 104    as -msse4.2.  */
 105 #define OPTION_MASK_ISA_SSE4_SET OPTION_MASK_ISA_SSE4_2_SET
 106
 107 #define OPTION_MASK_ISA_SSE4A_SET \
 108   (OPTION_MASK_ISA_SSE4A | OPTION_MASK_ISA_SSE3_SET)
 109 #define OPTION_MASK_ISA_FMA4_SET \
 110   (OPTION_MASK_ISA_FMA4 | OPTION_MASK_ISA_SSE4A_SET \
 111    | OPTION_MASK_ISA_AVX_SET)
 112 #define OPTION_MASK_ISA_XOP_SET \
 113   (OPTION_MASK_ISA_XOP | OPTION_MASK_ISA_FMA4_SET)
 114 #define OPTION_MASK_ISA_LWP_SET \
 115   OPTION_MASK_ISA_LWP
 116
 117 /* AES, SHA and PCLMUL need SSE2 because they use xmm registers.  */
 118 #define OPTION_MASK_ISA_AES_SET \
 119   (OPTION_MASK_ISA_AES | OPTION_MASK_ISA_SSE2_SET)
 120 #define OPTION_MASK_ISA_SHA_SET \
 121   (OPTION_MASK_ISA_SHA | OPTION_MASK_ISA_SSE2_SET)
 122 #define OPTION_MASK_ISA_PCLMUL_SET \
 123   (OPTION_MASK_ISA_PCLMUL | OPTION_MASK_ISA_SSE2_SET)
 124
 125 #define OPTION_MASK_ISA_ABM_SET \
 126   (OPTION_MASK_ISA_ABM | OPTION_MASK_ISA_POPCNT)
 127
 128 #define OPTION_MASK_ISA_PCONFIG_SET OPTION_MASK_ISA_PCONFIG
 129 #define OPTION_MASK_ISA_WBNOINVD_SET OPTION_MASK_ISA_WBNOINVD
 130 #define OPTION_MASK_ISA_SGX_SET OPTION_MASK_ISA_SGX
 131 #define OPTION_MASK_ISA_BMI_SET OPTION_MASK_ISA_BMI
 132 #define OPTION_MASK_ISA_BMI2_SET OPTION_MASK_ISA_BMI2
 133 #define OPTION_MASK_ISA_LZCNT_SET OPTION_MASK_ISA_LZCNT
 134 #define OPTION_MASK_ISA_TBM_SET OPTION_MASK_ISA_TBM
 135 #define OPTION_MASK_ISA_POPCNT_SET OPTION_MASK_ISA_POPCNT
 136 #define OPTION_MASK_ISA_CX16_SET OPTION_MASK_ISA_CX16
 137 #define OPTION_MASK_ISA_SAHF_SET OPTION_MASK_ISA_SAHF
 138 #define OPTION_MASK_ISA_MOVBE_SET OPTION_MASK_ISA_MOVBE
 139 #define OPTION_MASK_ISA_CRC32_SET OPTION_MASK_ISA_CRC32
 140
 141 #define OPTION_MASK_ISA_FSGSBASE_SET OPTION_MASK_ISA_FSGSBASE
 142 #define OPTION_MASK_ISA_RDRND_SET OPTION_MASK_ISA_RDRND
 143 #define OPTION_MASK_ISA_F16C_SET \
 144   (OPTION_MASK_ISA_F16C | OPTION_MASK_ISA_AVX_SET)
 145 #define OPTION_MASK_ISA_MWAITX_SET OPTION_MASK_ISA_MWAITX
 146 #define OPTION_MASK_ISA_CLZERO_SET OPTION_MASK_ISA_CLZERO
 147 #define OPTION_MASK_ISA_PKU_SET OPTION_MASK_ISA_PKU
 148 #define OPTION_MASK_ISA_RDPID_SET OPTION_MASK_ISA_RDPID
 149 #define OPTION_MASK_ISA_GFNI_SET OPTION_MASK_ISA_GFNI
 150 #define OPTION_MASK_ISA_SHSTK_SET OPTION_MASK_ISA_SHSTK
 151 #define OPTION_MASK_ISA_VAES_SET OPTION_MASK_ISA_VAES
 152 #define OPTION_MASK_ISA_VPCLMULQDQ_SET OPTION_MASK_ISA_VPCLMULQDQ
 153 #define OPTION_MASK_ISA_MOVDIRI_SET OPTION_MASK_ISA_MOVDIRI
 154 #define OPTION_MASK_ISA_MOVDIR64B_SET OPTION_MASK_ISA_MOVDIR64B
 155 #define OPTION_MASK_ISA_WAITPKG_SET OPTION_MASK_ISA_WAITPKG
 156
 157 /* Define a set of ISAs which aren't available when a given ISA is
 158    disabled.  MMX and SSE ISAs are handled separately.  */
 159
 160 #define OPTION_MASK_ISA_MMX_UNSET \
 161   (OPTION_MASK_ISA_MMX | OPTION_MASK_ISA_3DNOW_UNSET)
 162 #define OPTION_MASK_ISA_3DNOW_UNSET \
 163   (OPTION_MASK_ISA_3DNOW | OPTION_MASK_ISA_3DNOW_A_UNSET)
 164 #define OPTION_MASK_ISA_3DNOW_A_UNSET OPTION_MASK_ISA_3DNOW_A
 165
 166 #define OPTION_MASK_ISA_SSE_UNSET \
 167   (OPTION_MASK_ISA_SSE | OPTION_MASK_ISA_SSE2_UNSET)
 168 #define OPTION_MASK_ISA_SSE2_UNSET \
 169   (OPTION_MASK_ISA_SSE2 | OPTION_MASK_ISA_SSE3_UNSET)
 170 #define OPTION_MASK_ISA_SSE3_UNSET \
 171   (OPTION_MASK_ISA_SSE3 \
 172    | OPTION_MASK_ISA_SSSE3_UNSET \
 173    | OPTION_MASK_ISA_SSE4A_UNSET )
 174 #define OPTION_MASK_ISA_SSSE3_UNSET \
 175   (OPTION_MASK_ISA_SSSE3 | OPTION_MASK_ISA_SSE4_1_UNSET)
 176 #define OPTION_MASK_ISA_SSE4_1_UNSET \
 177   (OPTION_MASK_ISA_SSE4_1 | OPTION_MASK_ISA_SSE4_2_UNSET)
 178 #define OPTION_MASK_ISA_SSE4_2_UNSET \
 179   (OPTION_MASK_ISA_SSE4_2 | OPTION_MASK_ISA_AVX_UNSET )
 180 #define OPTION_MASK_ISA_AVX_UNSET \
 181   (OPTION_MASK_ISA_AVX | OPTION_MASK_ISA_FMA_UNSET \
 182    | OPTION_MASK_ISA_FMA4_UNSET | OPTION_MASK_ISA_F16C_UNSET \
 183    | OPTION_MASK_ISA_AVX2_UNSET | OPTION_MASK_ISA_XSAVE_UNSET)
 184 #define OPTION_MASK_ISA_FMA_UNSET OPTION_MASK_ISA_FMA
 185 #define OPTION_MASK_ISA_FXSR_UNSET OPTION_MASK_ISA_FXSR
 186 #define OPTION_MASK_ISA_XSAVE_UNSET \
 187   (OPTION_MASK_ISA_XSAVE | OPTION_MASK_ISA_XSAVEOPT_UNSET)
 188 #define OPTION_MASK_ISA_XSAVEOPT_UNSET OPTION_MASK_ISA_XSAVEOPT
 189 #define OPTION_MASK_ISA_AVX2_UNSET \
 190   (OPTION_MASK_ISA_AVX2 | OPTION_MASK_ISA_AVX512F_UNSET)
 191 #define OPTION_MASK_ISA_AVX512F_UNSET \
 192   (OPTION_MASK_ISA_AVX512F | OPTION_MASK_ISA_AVX512CD_UNSET \
 193    | OPTION_MASK_ISA_AVX512PF_UNSET | OPTION_MASK_ISA_AVX512ER_UNSET \
 194    | OPTION_MASK_ISA_AVX512DQ_UNSET | OPTION_MASK_ISA_AVX512BW_UNSET \
 195    | OPTION_MASK_ISA_AVX512VL_UNSET | OPTION_MASK_ISA_AVX512VBMI2_UNSET \
 196    | OPTION_MASK_ISA_AVX512VNNI_UNSET | OPTION_MASK_ISA_AVX512VPOPCNTDQ_UNSET \
 197    | OPTION_MASK_ISA_AVX512BITALG_UNSET)
 198 #define OPTION_MASK_ISA_AVX512CD_UNSET OPTION_MASK_ISA_AVX512CD
 199 #define OPTION_MASK_ISA_AVX512PF_UNSET OPTION_MASK_ISA_AVX512PF
 200 #define OPTION_MASK_ISA_AVX512ER_UNSET OPTION_MASK_ISA_AVX512ER
 201 #define OPTION_MASK_ISA_AVX512DQ_UNSET OPTION_MASK_ISA_AVX512DQ
 202 #define OPTION_MASK_ISA_AVX512BW_UNSET \
 203   (OPTION_MASK_ISA_AVX512BW | OPTION_MASK_ISA_AVX512VBMI_UNSET)
 204 #define OPTION_MASK_ISA_AVX512VL_UNSET OPTION_MASK_ISA_AVX512VL
 205 #define OPTION_MASK_ISA_AVX512IFMA_UNSET OPTION_MASK_ISA_AVX512IFMA
 206 #define OPTION_MASK_ISA_AVX512VBMI_UNSET OPTION_MASK_ISA_AVX512VBMI
 207 #define OPTION_MASK_ISA_AVX5124FMAPS_UNSET OPTION_MASK_ISA_AVX5124FMAPS
 208 #define OPTION_MASK_ISA_AVX5124VNNIW_UNSET OPTION_MASK_ISA_AVX5124VNNIW
 209 #define OPTION_MASK_ISA_AVX512VBMI2_UNSET OPTION_MASK_ISA_AVX512VBMI2
 210 #define OPTION_MASK_ISA_AVX512VNNI_UNSET OPTION_MASK_ISA_AVX512VNNI
 211 #define OPTION_MASK_ISA_AVX512VPOPCNTDQ_UNSET OPTION_MASK_ISA_AVX512VPOPCNTDQ
 212 #define OPTION_MASK_ISA_AVX512BITALG_UNSET OPTION_MASK_ISA_AVX512BITALG
 213 #define OPTION_MASK_ISA_RTM_UNSET OPTION_MASK_ISA_RTM
 214 #define OPTION_MASK_ISA_PRFCHW_UNSET OPTION_MASK_ISA_PRFCHW
 215 #define OPTION_MASK_ISA_RDSEED_UNSET OPTION_MASK_ISA_RDSEED
 216 #define OPTION_MASK_ISA_ADX_UNSET OPTION_MASK_ISA_ADX
 217 #define OPTION_MASK_ISA_PREFETCHWT1_UNSET OPTION_MASK_ISA_PREFETCHWT1
 218 #define OPTION_MASK_ISA_CLFLUSHOPT_UNSET OPTION_MASK_ISA_CLFLUSHOPT
 219 #define OPTION_MASK_ISA_XSAVEC_UNSET OPTION_MASK_ISA_XSAVEC
 220 #define OPTION_MASK_ISA_XSAVES_UNSET OPTION_MASK_ISA_XSAVES
 221 #define OPTION_MASK_ISA_CLWB_UNSET OPTION_MASK_ISA_CLWB
 222 #define OPTION_MASK_ISA_MWAITX_UNSET OPTION_MASK_ISA_MWAITX
 223 #define OPTION_MASK_ISA_CLZERO_UNSET OPTION_MASK_ISA_CLZERO
 224 #define OPTION_MASK_ISA_PKU_UNSET OPTION_MASK_ISA_PKU
 225 #define OPTION_MASK_ISA_RDPID_UNSET OPTION_MASK_ISA_RDPID
 226 #define OPTION_MASK_ISA_GFNI_UNSET OPTION_MASK_ISA_GFNI
 227 #define OPTION_MASK_ISA_SHSTK_UNSET OPTION_MASK_ISA_SHSTK
 228 #define OPTION_MASK_ISA_VAES_UNSET OPTION_MASK_ISA_VAES
 229 #define OPTION_MASK_ISA_VPCLMULQDQ_UNSET OPTION_MASK_ISA_VPCLMULQDQ
 230 #define OPTION_MASK_ISA_MOVDIRI_UNSET OPTION_MASK_ISA_MOVDIRI
 231 #define OPTION_MASK_ISA_MOVDIR64B_UNSET OPTION_MASK_ISA_MOVDIR64B
 232 #define OPTION_MASK_ISA_WAITPKG_UNSET OPTION_MASK_ISA_WAITPKG
 233
 234 /* SSE4 includes both SSE4.1 and SSE4.2.  -mno-sse4 should the same
 235    as -mno-sse4.1. */
 236 #define OPTION_MASK_ISA_SSE4_UNSET OPTION_MASK_ISA_SSE4_1_UNSET
 237
 238 #define OPTION_MASK_ISA_SSE4A_UNSET \
 239   (OPTION_MASK_ISA_SSE4A | OPTION_MASK_ISA_FMA4_UNSET)
 240
 241 #define OPTION_MASK_ISA_FMA4_UNSET \
 242   (OPTION_MASK_ISA_FMA4 | OPTION_MASK_ISA_XOP_UNSET)
 243 #define OPTION_MASK_ISA_XOP_UNSET OPTION_MASK_ISA_XOP
 244 #define OPTION_MASK_ISA_LWP_UNSET OPTION_MASK_ISA_LWP
 245
 246 #define OPTION_MASK_ISA_AES_UNSET OPTION_MASK_ISA_AES
 247 #define OPTION_MASK_ISA_SHA_UNSET OPTION_MASK_ISA_SHA
 248 #define OPTION_MASK_ISA_PCLMUL_UNSET OPTION_MASK_ISA_PCLMUL
 249 #define OPTION_MASK_ISA_ABM_UNSET OPTION_MASK_ISA_ABM
 250 #define OPTION_MASK_ISA_PCONFIG_UNSET OPTION_MASK_ISA_PCONFIG
 251 #define OPTION_MASK_ISA_WBNOINVD_UNSET OPTION_MASK_ISA_WBNOINVD
 252 #define OPTION_MASK_ISA_SGX_UNSET OPTION_MASK_ISA_SGX
 253 #define OPTION_MASK_ISA_BMI_UNSET OPTION_MASK_ISA_BMI
 254 #define OPTION_MASK_ISA_BMI2_UNSET OPTION_MASK_ISA_BMI2
 255 #define OPTION_MASK_ISA_LZCNT_UNSET OPTION_MASK_ISA_LZCNT
 256 #define OPTION_MASK_ISA_TBM_UNSET OPTION_MASK_ISA_TBM
 257 #define OPTION_MASK_ISA_POPCNT_UNSET OPTION_MASK_ISA_POPCNT
 258 #define OPTION_MASK_ISA_CX16_UNSET OPTION_MASK_ISA_CX16
 259 #define OPTION_MASK_ISA_SAHF_UNSET OPTION_MASK_ISA_SAHF
 260 #define OPTION_MASK_ISA_MOVBE_UNSET OPTION_MASK_ISA_MOVBE
 261 #define OPTION_MASK_ISA_CRC32_UNSET OPTION_MASK_ISA_CRC32
 262
 263 #define OPTION_MASK_ISA_FSGSBASE_UNSET OPTION_MASK_ISA_FSGSBASE
 264 #define OPTION_MASK_ISA_RDRND_UNSET OPTION_MASK_ISA_RDRND
 265 #define OPTION_MASK_ISA_F16C_UNSET OPTION_MASK_ISA_F16C
 266
 267 #define OPTION_MASK_ISA_GENERAL_REGS_ONLY_UNSET \
 268   (OPTION_MASK_ISA_MMX_UNSET \
 269    | OPTION_MASK_ISA_SSE_UNSET)
 270
 271 #define OPTION_MASK_ISA2_AVX512F_UNSET \
 272   (OPTION_MASK_ISA_AVX5124FMAPS_UNSET | OPTION_MASK_ISA_AVX5124VNNIW_UNSET)
 273 #define OPTION_MASK_ISA2_GENERAL_REGS_ONLY_UNSET \
 274   (OPTION_MASK_ISA2_AVX512F_UNSET | OPTION_MASK_ISA_MPX)
 275
 276 /* Implement TARGET_HANDLE_OPTION.  */
 277
 278 bool
 279 ix86_handle_option (struct gcc_options *opts,
 280                     struct gcc_options *opts_set ATTRIBUTE_UNUSED,
 281                     const struct cl_decoded_option *decoded,
 282                     location_t loc)
 283 {
 284   size_t code = decoded->opt_index;
 285   int value = decoded->value;
 286
 287   switch (code)
 288     {
 289     case OPT_mgeneral_regs_only:
 290       if (value)
 291         {
 292           /* Disable MPX, MMX, SSE and x87 instructions if only
 293              general registers are allowed.  */
 294           opts->x_ix86_isa_flags
 295             &= ~OPTION_MASK_ISA_GENERAL_REGS_ONLY_UNSET;
 296           opts->x_ix86_isa_flags2
 297             &= ~OPTION_MASK_ISA2_GENERAL_REGS_ONLY_UNSET;
 298           opts->x_ix86_isa_flags_explicit
 299             |= OPTION_MASK_ISA_GENERAL_REGS_ONLY_UNSET;
 300           opts->x_ix86_isa_flags2_explicit
 301             |= OPTION_MASK_ISA2_GENERAL_REGS_ONLY_UNSET;
 302
 303           opts->x_target_flags &= ~MASK_80387;
 304         }
 305       else
 306         gcc_unreachable ();
 307       return true;
 308
 309     case OPT_mmmx:
 310       if (value)
 311         {
 312           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_MMX_SET;
 313           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_MMX_SET;
 314         }
 315       else
 316         {
 317           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_MMX_UNSET;
 318           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_MMX_UNSET;
 319         }
 320       return true;
 321
 322     case OPT_m3dnow:
 323       if (value)
 324         {
 325           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_3DNOW_SET;
 326           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_3DNOW_SET;
 327         }
 328       else
 329         {
 330           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_3DNOW_UNSET;
 331           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_3DNOW_UNSET;
 332         }
 333       return true;
 334
 335     case OPT_m3dnowa:
 336       if (value)
 337         {
 338           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_3DNOW_A_SET;
 339           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_3DNOW_A_SET;
 340         }
 341       else
 342         {
 343           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_3DNOW_A_UNSET;
 344           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_3DNOW_A_UNSET;
 345         }
 346       return true;
 347
 348     case OPT_msse:
 349       if (value)
 350         {
 351           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSE_SET;
 352           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE_SET;
 353         }
 354       else
 355         {
 356           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_SSE_UNSET;
 357           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE_UNSET;
 358           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA2_AVX512F_UNSET;
 359           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA2_AVX512F_UNSET;
 360         }
 361       return true;
 362
 363     case OPT_msse2:
 364       if (value)
 365         {
 366           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSE2_SET;
 367           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE2_SET;
 368         }
 369       else
 370         {
 371           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_SSE2_UNSET;
 372           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE2_UNSET;
 373           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA2_AVX512F_UNSET;
 374           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA2_AVX512F_UNSET;
 375         }
 376       return true;
 377
 378     case OPT_msse3:
 379       if (value)
 380         {
 381           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSE3_SET;
 382           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE3_SET;
 383         }
 384       else
 385         {
 386           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_SSE3_UNSET;
 387           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE3_UNSET;
 388           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA2_AVX512F_UNSET;
 389           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA2_AVX512F_UNSET;
 390         }
 391       return true;
 392
 393     case OPT_mssse3:
 394       if (value)
 395         {
 396           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSSE3_SET;
 397           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSSE3_SET;
 398         }
 399       else
 400         {
 401           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_SSSE3_UNSET;
 402           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSSE3_UNSET;
 403           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA2_AVX512F_UNSET;
 404           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA2_AVX512F_UNSET;
 405         }
 406       return true;
 407
 408     case OPT_msse4_1:
 409       if (value)
 410         {
 411           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSE4_1_SET;
 412           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE4_1_SET;
 413         }
 414       else
 415         {
 416           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_SSE4_1_UNSET;
 417           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE4_1_UNSET;
 418           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA2_AVX512F_UNSET;
 419           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA2_AVX512F_UNSET;
 420         }
 421       return true;
 422
 423     case OPT_msse4_2:
 424       if (value)
 425         {
 426           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSE4_2_SET;
 427           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE4_2_SET;
 428         }
 429       else
 430         {
 431           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_SSE4_2_UNSET;
 432           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE4_2_UNSET;
 433           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA2_AVX512F_UNSET;
 434           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA2_AVX512F_UNSET;
 435         }
 436       return true;
 437
 438     case OPT_mavx:
 439       if (value)
 440         {
 441           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX_SET;
 442           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX_SET;
 443         }
 444       else
 445         {
 446           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_AVX_UNSET;
 447           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX_UNSET;
 448           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA2_AVX512F_UNSET;
 449           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA2_AVX512F_UNSET;
 450         }
 451       return true;
 452
 453     case OPT_mavx2:
 454       if (value)
 455         {
 456           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX2_SET;
 457           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX2_SET;
 458         }
 459       else
 460         {
 461           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_AVX2_UNSET;
 462           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX2_UNSET;
 463           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA2_AVX512F_UNSET;
 464           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA2_AVX512F_UNSET;
 465         }
 466       return true;
 467
 468     case OPT_mavx512f:
 469       if (value)
 470         {
 471           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512F_SET;
 472           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512F_SET;
 473         }
 474       else
 475         {
 476           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_AVX512F_UNSET;
 477           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512F_UNSET;
 478           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA2_AVX512F_UNSET;
 479           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA2_AVX512F_UNSET;
 480         }
 481       return true;
 482
 483     case OPT_mavx512cd:
 484       if (value)
 485         {
 486           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512CD_SET;
 487           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512CD_SET;
 488         }
 489       else
 490         {
 491           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_AVX512CD_UNSET;
 492           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512CD_UNSET;
 493         }
 494       return true;
 495
 496     case OPT_mavx512pf:
 497       if (value)
 498         {
 499           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512PF_SET;
 500           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512PF_SET;
 501         }
 502       else
 503         {
 504           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_AVX512PF_UNSET;
 505           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512PF_UNSET;
 506         }
 507       return true;
 508
 509     case OPT_mavx512er:
 510       if (value)
 511         {
 512           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512ER_SET;
 513           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512ER_SET;
 514         }
 515       else
 516         {
 517           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_AVX512ER_UNSET;
 518           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512ER_UNSET;
 519         }
 520       return true;
 521
 522     case OPT_mrdpid:
 523       if (value)
 524         {
 525           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA_RDPID_SET;
 526           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_RDPID_SET;
 527         }
 528       else
 529         {
 530           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA_RDPID_UNSET;
 531           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_RDPID_UNSET;
 532         }
 533       return true;
 534
 535     case OPT_mgfni:
 536       if (value)
 537         {
 538           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_GFNI_SET;
 539           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_GFNI_SET;
 540         }
 541       else
 542         {
 543           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_GFNI_UNSET;
 544           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_GFNI_UNSET;
 545         }
 546       return true;
 547
 548     case OPT_mshstk:
 549       if (value)
 550         {
 551           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SHSTK_SET;
 552           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SHSTK_SET;
 553         }
 554       else
 555         {
 556           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_SHSTK_UNSET;
 557           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SHSTK_UNSET;
 558         }
 559       return true;
 560
 561     case OPT_mvaes:
 562       if (value)
 563         {
 564           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA_VAES_SET;
 565           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_VAES_SET;
 566         }
 567       else
 568         {
 569           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA_VAES_UNSET;
 570           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_VAES_UNSET;
 571         }
 572       return true;
 573
 574     case OPT_mvpclmulqdq:
 575       if (value)
 576         {
 577           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_VPCLMULQDQ_SET;
 578           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_VPCLMULQDQ_SET;
 579         }
 580       else
 581         {
 582           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_VPCLMULQDQ_UNSET;
 583           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_VPCLMULQDQ_UNSET;
 584         }
 585       return true;
 586
 587     case OPT_mmovdiri:
 588       if (value)
 589         {
 590           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_MOVDIRI_SET;
 591           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_MOVDIRI_SET;
 592         }
 593       else
 594         {
 595           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_MOVDIRI_UNSET;
 596           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_MOVDIRI_UNSET;
 597         }
 598       return true;
 599
 600     case OPT_mmovdir64b:
 601       if (value)
 602         {
 603           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA_MOVDIR64B_SET;
 604           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_MOVDIR64B_SET;
 605         }
 606       else
 607         {
 608           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA_MOVDIR64B_UNSET;
 609           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_MOVDIR64B_UNSET;
 610         }
 611       return true;
 612
 613     case OPT_mwaitpkg:
 614       if (value)
 615         {
 616           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA_WAITPKG_SET;
 617           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_WAITPKG_SET;
 618         }
 619       else
 620         {
 621           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA_WAITPKG_UNSET;
 622           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_WAITPKG_UNSET;
 623         }
 624       return true;
 625
 626     case OPT_mavx5124fmaps:
 627       if (value)
 628         {
 629           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA_AVX5124FMAPS_SET;
 630           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_AVX5124FMAPS_SET;
 631           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512F_SET;
 632           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512F_SET;
 633         }
 634       else
 635         {
 636           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA_AVX5124FMAPS_UNSET;
 637           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_AVX5124FMAPS_UNSET;
 638         }
 639       return true;
 640
 641     case OPT_mavx5124vnniw:
 642       if (value)
 643         {
 644           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA_AVX5124VNNIW_SET;
 645           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_AVX5124VNNIW_SET;
 646           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512F_SET;
 647           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512F_SET;
 648         }
 649       else
 650         {
 651           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA_AVX5124VNNIW_UNSET;
 652           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_AVX5124VNNIW_UNSET;
 653         }
 654       return true;
 655
 656     case OPT_mavx512vbmi2:
 657       if (value)
 658         {
 659           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512VBMI2_SET;
 660           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512VBMI2_SET;
 661         }
 662       else
 663         {
 664           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_AVX512VBMI2_UNSET;
 665           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512VBMI2_UNSET;
 666         }
 667       return true;
 668
 669     case OPT_mavx512vnni:
 670       if (value)
 671         {
 672           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512VNNI_SET;
 673           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512VNNI_SET;
 674         }
 675       else
 676         {
 677           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_AVX512VNNI_UNSET;
 678           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512VNNI_UNSET;
 679         }
 680       return true;
 681
 682     case OPT_mavx512vpopcntdq:
 683       if (value)
 684         {
 685           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512VPOPCNTDQ_SET;
 686           opts->x_ix86_isa_flags_explicit
 687             |= OPTION_MASK_ISA_AVX512VPOPCNTDQ_SET;
 688         }
 689       else
 690         {
 691           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_AVX512VPOPCNTDQ_UNSET;
 692           opts->x_ix86_isa_flags_explicit
 693             |= OPTION_MASK_ISA_AVX512VPOPCNTDQ_UNSET;
 694         }
 695       return true;
 696
 697     case OPT_mavx512bitalg:
 698       if (value)
 699         {
 700           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512BITALG_SET;
 701           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512BITALG_SET;
 702         }
 703       else
 704         {
 705           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_AVX512BITALG_UNSET;
 706           opts->x_ix86_isa_flags_explicit
 707                 |= OPTION_MASK_ISA_AVX512BITALG_UNSET;
 708         }
 709       return true;
 710
 711     case OPT_msgx:
 712       if (value)
 713         {
 714           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA_SGX_SET;
 715           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_SGX_SET;
 716         }
 717       else
 718         {
 719           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA_SGX_UNSET;
 720           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_SGX_UNSET;
 721         }
 722       return true;
 723
 724     case OPT_mpconfig:
 725       if (value)
 726         {
 727           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA_PCONFIG_SET;
 728           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_PCONFIG_SET;
 729         }
 730       else
 731         {
 732           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA_PCONFIG_UNSET;
 733           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_PCONFIG_UNSET;
 734         }
 735       return true;
 736
 737     case OPT_mwbnoinvd:
 738       if (value)
 739         {
 740           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA_WBNOINVD_SET;
 741           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_WBNOINVD_SET;
 742         }
 743       else
 744         {
 745           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA_WBNOINVD_UNSET;
 746           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_WBNOINVD_UNSET;
 747         }
 748       return true;
 749
 750     case OPT_mavx512dq:
 751       if (value)
 752         {
 753           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512DQ_SET;
 754           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512DQ_SET;
 755         }
 756       else
 757         {
 758           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_AVX512DQ_UNSET;
 759           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512DQ_UNSET;
 760         }
 761       return true;
 762
 763     case OPT_mavx512bw:
 764       if (value)
 765         {
 766           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512BW_SET;
 767           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512BW_SET;
 768         }
 769       else
 770         {
 771           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_AVX512BW_UNSET;
 772           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512BW_UNSET;
 773         }
 774       return true;
 775
 776     case OPT_mavx512vl:
 777       if (value)
 778         {
 779           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512VL_SET;
 780           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512VL_SET;
 781         }
 782       else
 783         {
 784           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_AVX512VL_UNSET;
 785           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512VL_UNSET;
 786         }
 787       return true;
 788
 789     case OPT_mavx512ifma:
 790       if (value)
 791         {
 792           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512IFMA_SET;
 793           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512IFMA_SET;
 794         }
 795       else
 796         {
 797           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_AVX512IFMA_UNSET;
 798           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512IFMA_UNSET;
 799         }
 800       return true;
 801
 802     case OPT_mavx512vbmi:
 803       if (value)
 804         {
 805           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512VBMI_SET;
 806           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512VBMI_SET;
 807         }
 808       else
 809         {
 810           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_AVX512VBMI_UNSET;
 811           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AVX512VBMI_UNSET;
 812         }
 813       return true;
 814
 815     case OPT_mfma:
 816       if (value)
 817         {
 818           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_FMA_SET;
 819           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_FMA_SET;
 820         }
 821       else
 822         {
 823           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_FMA_UNSET;
 824           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_FMA_UNSET;
 825         }
 826       return true;
 827
 828     case OPT_mrtm:
 829       if (value)
 830         {
 831           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_RTM_SET;
 832           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_RTM_SET;
 833         }
 834       else
 835         {
 836           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_RTM_UNSET;
 837           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_RTM_UNSET;
 838         }
 839       return true;
 840
 841     case OPT_msse4:
 842       opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSE4_SET;
 843       opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE4_SET;
 844       return true;
 845
 846     case OPT_mno_sse4:
 847       opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_SSE4_UNSET;
 848       opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE4_UNSET;
 849       opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA2_AVX512F_UNSET;
 850       opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA2_AVX512F_UNSET;
 851       return true;
 852
 853     case OPT_msse4a:
 854       if (value)
 855         {
 856           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSE4A_SET;
 857           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE4A_SET;
 858         }
 859       else
 860         {
 861           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_SSE4A_UNSET;
 862           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SSE4A_UNSET;
 863         }
 864       return true;
 865
 866     case OPT_mfma4:
 867       if (value)
 868         {
 869           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_FMA4_SET;
 870           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_FMA4_SET;
 871         }
 872       else
 873         {
 874           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_FMA4_UNSET;
 875           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_FMA4_UNSET;
 876         }
 877       return true;
 878
 879    case OPT_mxop:
 880       if (value)
 881         {
 882           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_XOP_SET;
 883           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_XOP_SET;
 884         }
 885       else
 886         {
 887           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_XOP_UNSET;
 888           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_XOP_UNSET;
 889         }
 890       return true;
 891
 892    case OPT_mlwp:
 893       if (value)
 894         {
 895           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_LWP_SET;
 896           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_LWP_SET;
 897         }
 898       else
 899         {
 900           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_LWP_UNSET;
 901           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_LWP_UNSET;
 902         }
 903       return true;
 904
 905     case OPT_mabm:
 906       if (value)
 907         {
 908           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_ABM_SET;
 909           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_ABM_SET;
 910         }
 911       else
 912         {
 913           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_ABM_UNSET;
 914           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_ABM_UNSET;
 915         }
 916       return true;
 917
 918     case OPT_mbmi:
 919       if (value)
 920         {
 921           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_BMI_SET;
 922           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_BMI_SET;
 923         }
 924       else
 925         {
 926           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_BMI_UNSET;
 927           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_BMI_UNSET;
 928         }
 929       return true;
 930
 931     case OPT_mbmi2:
 932       if (value)
 933         {
 934           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_BMI2_SET;
 935           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_BMI2_SET;
 936         }
 937       else
 938         {
 939           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_BMI2_UNSET;
 940           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_BMI2_UNSET;
 941         }
 942       return true;
 943
 944     case OPT_mlzcnt:
 945       if (value)
 946         {
 947           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_LZCNT_SET;
 948           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_LZCNT_SET;
 949         }
 950       else
 951         {
 952           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_LZCNT_UNSET;
 953           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_LZCNT_UNSET;
 954         }
 955       return true;
 956
 957     case OPT_mtbm:
 958       if (value)
 959         {
 960           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_TBM_SET;
 961           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_TBM_SET;
 962         }
 963       else
 964         {
 965           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_TBM_UNSET;
 966           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_TBM_UNSET;
 967         }
 968       return true;
 969
 970     case OPT_mpopcnt:
 971       if (value)
 972         {
 973           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_POPCNT_SET;
 974           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_POPCNT_SET;
 975         }
 976       else
 977         {
 978           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_POPCNT_UNSET;
 979           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_POPCNT_UNSET;
 980         }
 981       return true;
 982
 983     case OPT_msahf:
 984       if (value)
 985         {
 986           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SAHF_SET;
 987           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SAHF_SET;
 988         }
 989       else
 990         {
 991           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_SAHF_UNSET;
 992           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SAHF_UNSET;
 993         }
 994       return true;
 995
 996     case OPT_mcx16:
 997       if (value)
 998         {
 999           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA_CX16_SET;
1000           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_CX16_SET;
1001         }
1002       else
1003         {
1004           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA_CX16_UNSET;
1005           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_CX16_UNSET;
1006         }
1007       return true;
1008
1009     case OPT_mmovbe:
1010       if (value)
1011         {
1012           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA_MOVBE_SET;
1013           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_MOVBE_SET;
1014         }
1015       else
1016         {
1017           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA_MOVBE_UNSET;
1018           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_MOVBE_UNSET;
1019         }
1020       return true;
1021
1022     case OPT_mcrc32:
1023       if (value)
1024         {
1025           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_CRC32_SET;
1026           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_CRC32_SET;
1027         }
1028       else
1029         {
1030           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_CRC32_UNSET;
1031           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_CRC32_UNSET;
1032         }
1033       return true;
1034
1035     case OPT_maes:
1036       if (value)
1037         {
1038           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AES_SET;
1039           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AES_SET;
1040         }
1041       else
1042         {
1043           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_AES_UNSET;
1044           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_AES_UNSET;
1045         }
1046       return true;
1047
1048     case OPT_msha:
1049       if (value)
1050         {
1051           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SHA_SET;
1052           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SHA_SET;
1053         }
1054       else
1055         {
1056           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_SHA_UNSET;
1057           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_SHA_UNSET;
1058         }
1059       return true;
1060
1061     case OPT_mpclmul:
1062       if (value)
1063         {
1064           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_PCLMUL_SET;
1065           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_PCLMUL_SET;
1066         }
1067       else
1068         {
1069           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_PCLMUL_UNSET;
1070           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_PCLMUL_UNSET;
1071         }
1072       return true;
1073
1074     case OPT_mfsgsbase:
1075       if (value)
1076         {
1077           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_FSGSBASE_SET;
1078           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_FSGSBASE_SET;
1079         }
1080       else
1081         {
1082           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_FSGSBASE_UNSET;
1083           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_FSGSBASE_UNSET;
1084         }
1085       return true;
1086
1087     case OPT_mrdrnd:
1088       if (value)
1089         {
1090           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_RDRND_SET;
1091           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_RDRND_SET;
1092         }
1093       else
1094         {
1095           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_RDRND_UNSET;
1096           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_RDRND_UNSET;
1097         }
1098       return true;
1099
1100     case OPT_mf16c:
1101       if (value)
1102         {
1103           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_F16C_SET;
1104           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_F16C_SET;
1105         }
1106       else
1107         {
1108           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_F16C_UNSET;
1109           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_F16C_UNSET;
1110         }
1111       return true;
1112
1113     case OPT_mfxsr:
1114       if (value)
1115         {
1116           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_FXSR_SET;
1117           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_FXSR_SET;
1118         }
1119       else
1120         {
1121           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_FXSR_UNSET;
1122           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_FXSR_UNSET;
1123         }
1124       return true;
1125
1126     case OPT_mxsave:
1127       if (value)
1128         {
1129           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_XSAVE_SET;
1130           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_XSAVE_SET;
1131         }
1132       else
1133         {
1134           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_XSAVE_UNSET;
1135           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_XSAVE_UNSET;
1136         }
1137       return true;
1138
1139     case OPT_mxsaveopt:
1140       if (value)
1141         {
1142           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_XSAVEOPT_SET;
1143           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_XSAVEOPT_SET;
1144         }
1145       else
1146         {
1147           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_XSAVEOPT_UNSET;
1148           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_XSAVEOPT_UNSET;
1149         }
1150       return true;
1151
1152     case OPT_mxsavec:
1153       if (value)
1154         {
1155           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_XSAVEC_SET;
1156           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_XSAVEC_SET;
1157         }
1158       else
1159         {
1160           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_XSAVEC_UNSET;
1161           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_XSAVEC_UNSET;
1162         }
1163       return true;
1164
1165     case OPT_mxsaves:
1166       if (value)
1167         {
1168           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_XSAVES_SET;
1169           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_XSAVES_SET;
1170         }
1171       else
1172         {
1173           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_XSAVES_UNSET;
1174           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_XSAVES_UNSET;
1175         }
1176       return true;
1177
1178     case OPT_mrdseed:
1179       if (value)
1180         {
1181           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_RDSEED_SET;
1182           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_RDSEED_SET;
1183         }
1184       else
1185         {
1186           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_RDSEED_UNSET;
1187           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_RDSEED_UNSET;
1188         }
1189       return true;
1190
1191     case OPT_mprfchw:
1192       if (value)
1193         {
1194           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_PRFCHW_SET;
1195           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_PRFCHW_SET;
1196         }
1197       else
1198         {
1199           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_PRFCHW_UNSET;
1200           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_PRFCHW_UNSET;
1201         }
1202       return true;
1203
1204     case OPT_madx:
1205       if (value)
1206         {
1207           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_ADX_SET;
1208           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_ADX_SET;
1209         }
1210       else
1211         {
1212           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_ADX_UNSET;
1213           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_ADX_UNSET;
1214         }
1215       return true;
1216
1217     case OPT_mprefetchwt1:
1218       if (value)
1219         {
1220           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_PREFETCHWT1_SET;
1221           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_PREFETCHWT1_SET;
1222         }
1223       else
1224         {
1225           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_PREFETCHWT1_UNSET;
1226           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_PREFETCHWT1_UNSET;
1227         }
1228       return true;
1229
1230     case OPT_mclflushopt:
1231       if (value)
1232         {
1233           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_CLFLUSHOPT_SET;
1234           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_CLFLUSHOPT_SET;
1235         }
1236       else
1237         {
1238           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_CLFLUSHOPT_UNSET;
1239           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_CLFLUSHOPT_UNSET;
1240         }
1241       return true;
1242
1243     case OPT_mclwb:
1244       if (value)
1245         {
1246           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_CLWB_SET;
1247           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_CLWB_SET;
1248         }
1249       else
1250         {
1251           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_CLWB_UNSET;
1252           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_CLWB_UNSET;
1253         }
1254       return true;
1255
1256     case OPT_mmwaitx:
1257       if (value)
1258         {
1259           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA_MWAITX_SET;
1260           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_MWAITX_SET;
1261         }
1262       else
1263         {
1264           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA_MWAITX_UNSET;
1265           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_MWAITX_UNSET;
1266         }
1267       return true;
1268
1269     case OPT_mclzero:
1270       if (value)
1271         {
1272           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA_CLZERO_SET;
1273           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_CLZERO_SET;
1274         }
1275       else
1276         {
1277           opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA_CLZERO_UNSET;
1278           opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA_CLZERO_UNSET;
1279         }
1280       return true;
1281
1282     case OPT_mpku:
1283       if (value)
1284         {
1285           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_PKU_SET;
1286           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_PKU_SET;
1287         }
1288       else
1289         {
1290           opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_PKU_UNSET;
1291           opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_PKU_UNSET;
1292         }
1293       return true;
1294
1295
1296   /* Comes from final.c -- no real reason to change it.  */
1297 #define MAX_CODE_ALIGN 16
1298
1299     case OPT_malign_loops_:
1300       warning_at (loc, 0, "-malign-loops is obsolete, use -falign-loops");
1301       if (value > MAX_CODE_ALIGN)
1302         error_at (loc, "-malign-loops=%d is not between 0 and %d",
1303                   value, MAX_CODE_ALIGN);
1304       else
1305         opts->x_align_loops = 1 << value;
1306       return true;
1307
1308     case OPT_malign_jumps_:
1309       warning_at (loc, 0, "-malign-jumps is obsolete, use -falign-jumps");
1310       if (value > MAX_CODE_ALIGN)
1311         error_at (loc, "-malign-jumps=%d is not between 0 and %d",
1312                   value, MAX_CODE_ALIGN);
1313       else
1314         opts->x_align_jumps = 1 << value;
1315       return true;
1316
1317     case OPT_malign_functions_:
1318       warning_at (loc, 0,
1319                   "-malign-functions is obsolete, use -falign-functions");
1320       if (value > MAX_CODE_ALIGN)
1321         error_at (loc, "-malign-functions=%d is not between 0 and %d",
1322                   value, MAX_CODE_ALIGN);
1323       else
1324         opts->x_align_functions = 1 << value;
1325       return true;
1326
1327     case OPT_mbranch_cost_:
1328       if (value > 5)
1329         {
1330           error_at (loc, "-mbranch-cost=%d is not between 0 and 5", value);
1331           opts->x_ix86_branch_cost = 5;
1332         }
1333       return true;
1334
1335     default:
1336       return true;
1337     }
1338 }
1339
1340 static const struct default_options ix86_option_optimization_table[] =
1341   {
1342     /* Enable redundant extension instructions removal at -O2 and higher.  */
1343     { OPT_LEVELS_2_PLUS, OPT_free, NULL, 1 },
1344     /* Enable function splitting at -O2 and higher.  */
1345     { OPT_LEVELS_2_PLUS, OPT_freorder_blocks_and_partition, NULL, 1 },
1346     /* The STC algorithm produces the smallest code at -Os, for x86.  */
1347     { OPT_LEVELS_2_PLUS, OPT_freorder_blocks_algorithm_, NULL,
1348       REORDER_BLOCKS_ALGORITHM_STC },
1349     /* Turn off -fschedule-insns by default.  It tends to make the
1350        problem with not enough registers even worse.  */
1351     { OPT_LEVELS_ALL, OPT_fschedule_insns, NULL, 0 },
1352
1353 #ifdef SUBTARGET_OPTIMIZATION_OPTIONS
1354     SUBTARGET_OPTIMIZATION_OPTIONS,
1355 #endif
1356     { OPT_LEVELS_NONE, 0, NULL, 0 }
1357   };
1358
1359 /* Implement TARGET_OPTION_INIT_STRUCT.  */
1360
1361 static void
1362 ix86_option_init_struct (struct gcc_options *opts)
1363 {
1364   if (TARGET_MACHO)
1365     /* The Darwin libraries never set errno, so we might as well
1366        avoid calling them when that's the only reason we would.  */
1367     opts->x_flag_errno_math = 0;
1368
1369   opts->x_flag_pcc_struct_return = 2;
1370   opts->x_flag_asynchronous_unwind_tables = 2;
1371 }
1372
1373 /* On the x86 -fsplit-stack and -fstack-protector both use the same
1374    field in the TCB, so they can not be used together.  */
1375
1376 static bool
1377 ix86_supports_split_stack (bool report ATTRIBUTE_UNUSED,
1378                            struct gcc_options *opts ATTRIBUTE_UNUSED)
1379 {
1380   bool ret = true;
1381
1382 #ifndef TARGET_THREAD_SPLIT_STACK_OFFSET
1383   if (report)
1384     error ("%<-fsplit-stack%> currently only supported on GNU/Linux");
1385   ret = false;
1386 #else
1387   if (!HAVE_GAS_CFI_PERSONALITY_DIRECTIVE)
1388     {
1389       if (report)
1390         error ("%<-fsplit-stack%> requires "
1391                "assembler support for CFI directives");
1392       ret = false;
1393     }
1394 #endif
1395
1396   return ret;
1397 }
1398
1399 /* Implement TARGET_EXCEPT_UNWIND_INFO.  */
1400
1401 static enum unwind_info_type
1402 i386_except_unwind_info (struct gcc_options *opts)
1403 {
1404   /* Honor the --enable-sjlj-exceptions configure switch.  */
1405 #ifdef CONFIG_SJLJ_EXCEPTIONS
1406   if (CONFIG_SJLJ_EXCEPTIONS)
1407     return UI_SJLJ;
1408 #endif
1409
1410   /* On windows 64, prefer SEH exceptions over anything else.  */
1411   if (TARGET_64BIT && DEFAULT_ABI == MS_ABI && opts->x_flag_unwind_tables)
1412     return UI_SEH;
1413
1414   if (DWARF2_UNWIND_INFO)
1415     return UI_DWARF2;
1416
1417   return UI_SJLJ;
1418 }
1419
1420 #undef  TARGET_EXCEPT_UNWIND_INFO
1421 #define TARGET_EXCEPT_UNWIND_INFO  i386_except_unwind_info
1422
1423 #undef TARGET_DEFAULT_TARGET_FLAGS
1424 #define TARGET_DEFAULT_TARGET_FLAGS     \
1425   (TARGET_DEFAULT                       \
1426    | TARGET_SUBTARGET_DEFAULT           \
1427    | TARGET_TLS_DIRECT_SEG_REFS_DEFAULT)
1428
1429 #undef TARGET_HANDLE_OPTION
1430 #define TARGET_HANDLE_OPTION ix86_handle_option
1431
1432 #undef TARGET_OPTION_OPTIMIZATION_TABLE
1433 #define TARGET_OPTION_OPTIMIZATION_TABLE ix86_option_optimization_table
1434 #undef TARGET_OPTION_INIT_STRUCT
1435 #define TARGET_OPTION_INIT_STRUCT ix86_option_init_struct
1436
1437 #undef TARGET_SUPPORTS_SPLIT_STACK
1438 #define TARGET_SUPPORTS_SPLIT_STACK ix86_supports_split_stack
1439
1440 struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;