gcc/config/i386/cpuid.h

   1 /*
   2  * Copyright (C) 2007-2023 Free Software Foundation, Inc.
   3  *
   4  * This file is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License as published by the
   6  * Free Software Foundation; either version 3, or (at your option) any
   7  * later version.
   8  *
   9  * This file is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * Under Section 7 of GPL version 3, you are granted additional
  15  * permissions described in the GCC Runtime Library Exception, version
  16  * 3.1, as published by the Free Software Foundation.
  17  *
  18  * You should have received a copy of the GNU General Public License and
  19  * a copy of the GCC Runtime Library Exception along with this program;
  20  * see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  21  * <http://www.gnu.org/licenses/>.
  22  */
  23
  24 #ifndef _CPUID_H_INCLUDED
  25 #define _CPUID_H_INCLUDED
  26
  27 /* %ecx */
  28 #define bit_SSE3        (1 << 0)
  29 #define bit_PCLMUL      (1 << 1)
  30 #define bit_LZCNT       (1 << 5)
  31 #define bit_SSSE3       (1 << 9)
  32 #define bit_FMA         (1 << 12)
  33 #define bit_CMPXCHG16B  (1 << 13)
  34 #define bit_SSE4_1      (1 << 19)
  35 #define bit_SSE4_2      (1 << 20)
  36 #define bit_MOVBE       (1 << 22)
  37 #define bit_POPCNT      (1 << 23)
  38 #define bit_AES         (1 << 25)
  39 #define bit_XSAVE       (1 << 26)
  40 #define bit_OSXSAVE     (1 << 27)
  41 #define bit_AVX         (1 << 28)
  42 #define bit_F16C        (1 << 29)
  43 #define bit_RDRND       (1 << 30)
  44
  45 /* %edx */
  46 #define bit_CMPXCHG8B   (1 << 8)
  47 #define bit_CMOV        (1 << 15)
  48 #define bit_MMX         (1 << 23)
  49 #define bit_FXSAVE      (1 << 24)
  50 #define bit_SSE         (1 << 25)
  51 #define bit_SSE2        (1 << 26)
  52
  53 /* Extended Features (%eax == 0x80000001) */
  54 /* %ecx */
  55 #define bit_LAHF_LM     (1 << 0)
  56 #define bit_ABM         (1 << 5)
  57 #define bit_SSE4a       (1 << 6)
  58 #define bit_PRFCHW      (1 << 8)
  59 #define bit_XOP         (1 << 11)
  60 #define bit_LWP         (1 << 15)
  61 #define bit_FMA4        (1 << 16)
  62 #define bit_TBM         (1 << 21)
  63 #define bit_MWAITX      (1 << 29)
  64
  65 /* %edx */
  66 #define bit_MMXEXT      (1 << 22)
  67 #define bit_LM          (1 << 29)
  68 #define bit_3DNOWP      (1 << 30)
  69 #define bit_3DNOW       (1u << 31)
  70
  71 /* %ebx  */
  72 #define bit_CLZERO      (1 << 0)
  73 #define bit_WBNOINVD    (1 << 9)
  74
  75 /* Extended Features Leaf (%eax == 7, %ecx == 0) */
  76 /* %ebx */
  77 #define bit_FSGSBASE    (1 << 0)
  78 #define bit_SGX         (1 << 2)
  79 #define bit_BMI         (1 << 3)
  80 #define bit_HLE         (1 << 4)
  81 #define bit_AVX2        (1 << 5)
  82 #define bit_BMI2        (1 << 8)
  83 #define bit_RTM         (1 << 11)
  84 #define bit_AVX512F     (1 << 16)
  85 #define bit_AVX512DQ    (1 << 17)
  86 #define bit_RDSEED      (1 << 18)
  87 #define bit_ADX         (1 << 19)
  88 #define bit_AVX512IFMA  (1 << 21)
  89 #define bit_CLFLUSHOPT  (1 << 23)
  90 #define bit_CLWB        (1 << 24)
  91 #define bit_AVX512PF    (1 << 26)
  92 #define bit_AVX512ER    (1 << 27)
  93 #define bit_AVX512CD    (1 << 28)
  94 #define bit_SHA         (1 << 29)
  95 #define bit_AVX512BW    (1 << 30)
  96 #define bit_AVX512VL    (1u << 31)
  97
  98 /* %ecx */
  99 #define bit_PREFETCHWT1 (1 << 0)
 100 #define bit_AVX512VBMI  (1 << 1)
 101 #define bit_PKU         (1 << 3)
 102 #define bit_OSPKE       (1 << 4)
 103 #define bit_WAITPKG     (1 << 5)
 104 #define bit_AVX512VBMI2 (1 << 6)
 105 #define bit_SHSTK       (1 << 7)
 106 #define bit_GFNI        (1 << 8)
 107 #define bit_VAES        (1 << 9)
 108 #define bit_VPCLMULQDQ  (1 << 10)
 109 #define bit_AVX512VNNI  (1 << 11)
 110 #define bit_AVX512BITALG        (1 << 12)
 111 #define bit_AVX512VPOPCNTDQ     (1 << 14)
 112 #define bit_RDPID       (1 << 22)
 113 #define bit_KL          (1 << 23)
 114 #define bit_CLDEMOTE    (1 << 25)
 115 #define bit_MOVDIRI     (1 << 27)
 116 #define bit_MOVDIR64B   (1 << 28)
 117 #define bit_ENQCMD      (1 << 29)
 118
 119 /* %edx */
 120 #define bit_AVX5124VNNIW        (1 << 2)
 121 #define bit_AVX5124FMAPS        (1 << 3)
 122 #define bit_UINTR       (1 << 5)
 123 #define bit_AVX512VP2INTERSECT  (1 << 8)
 124 #define bit_SERIALIZE   (1 << 14)
 125 #define bit_TSXLDTRK    (1 << 16)
 126 #define bit_PCONFIG     (1 << 18)
 127 #define bit_IBT         (1 << 20)
 128 #define bit_AMX_BF16    (1 << 22)
 129 #define bit_AVX512FP16  (1 << 23)
 130 #define bit_AMX_TILE    (1 << 24)
 131 #define bit_AMX_INT8    (1 << 25)
 132
 133 /* Extended Features Sub-leaf (%eax == 7, %ecx == 1) */
 134 /* %eax */
 135 #define bit_SHA512      (1 << 0)
 136 #define bit_SM3         (1 << 1)
 137 #define bit_SM4         (1 << 2)
 138 #define bit_RAOINT      (1 << 3)
 139 #define bit_AVXVNNI     (1 << 4)
 140 #define bit_AVX512BF16  (1 << 5)
 141 #define bit_CMPCCXADD   (1 << 7)
 142 #define bit_AMX_COMPLEX (1 << 8)
 143 #define bit_AMX_FP16    (1 << 21)
 144 #define bit_HRESET      (1 << 22)
 145 #define bit_AVXIFMA     (1 << 23)
 146
 147 /* %edx */
 148 #define bit_AVXVNNIINT8 (1 << 4)
 149 #define bit_AVXNECONVERT        (1 << 5)
 150 #define bit_AVXVNNIINT16        (1 << 10)
 151 #define bit_PREFETCHI   (1 << 14)
 152
 153 /* Extended State Enumeration Sub-leaf (%eax == 0xd, %ecx == 1) */
 154 #define bit_XSAVEOPT    (1 << 0)
 155 #define bit_XSAVEC      (1 << 1)
 156 #define bit_XSAVES      (1 << 3)
 157
 158 /* PT sub leaf (%eax == 0x14, %ecx == 0) */
 159 /* %ebx */
 160 #define bit_PTWRITE     (1 << 4)
 161
 162 /* Keylocker leaf (%eax == 0x19) */
 163 /* %ebx */
 164 #define bit_AESKLE      ( 1<<0 )
 165 #define bit_WIDEKL      ( 1<<2 )
 166
 167
 168 /* Signatures for different CPU implementations as returned in uses
 169    of cpuid with level 0.  */
 170 #define signature_AMD_ebx       0x68747541
 171 #define signature_AMD_ecx       0x444d4163
 172 #define signature_AMD_edx       0x69746e65
 173
 174 #define signature_CENTAUR_ebx   0x746e6543
 175 #define signature_CENTAUR_ecx   0x736c7561
 176 #define signature_CENTAUR_edx   0x48727561
 177
 178 #define signature_CYRIX_ebx     0x69727943
 179 #define signature_CYRIX_ecx     0x64616574
 180 #define signature_CYRIX_edx     0x736e4978
 181
 182 #define signature_INTEL_ebx     0x756e6547
 183 #define signature_INTEL_ecx     0x6c65746e
 184 #define signature_INTEL_edx     0x49656e69
 185
 186 #define signature_TM1_ebx       0x6e617254
 187 #define signature_TM1_ecx       0x55504361
 188 #define signature_TM1_edx       0x74656d73
 189
 190 #define signature_TM2_ebx       0x756e6547
 191 #define signature_TM2_ecx       0x3638784d
 192 #define signature_TM2_edx       0x54656e69
 193
 194 #define signature_NSC_ebx       0x646f6547
 195 #define signature_NSC_ecx       0x43534e20
 196 #define signature_NSC_edx       0x79622065
 197
 198 #define signature_NEXGEN_ebx    0x4778654e
 199 #define signature_NEXGEN_ecx    0x6e657669
 200 #define signature_NEXGEN_edx    0x72446e65
 201
 202 #define signature_RISE_ebx      0x65736952
 203 #define signature_RISE_ecx      0x65736952
 204 #define signature_RISE_edx      0x65736952
 205
 206 #define signature_SIS_ebx       0x20536953
 207 #define signature_SIS_ecx       0x20536953
 208 #define signature_SIS_edx       0x20536953
 209
 210 #define signature_UMC_ebx       0x20434d55
 211 #define signature_UMC_ecx       0x20434d55
 212 #define signature_UMC_edx       0x20434d55
 213
 214 #define signature_VIA_ebx       0x20414956
 215 #define signature_VIA_ecx       0x20414956
 216 #define signature_VIA_edx       0x20414956
 217
 218 #define signature_VORTEX_ebx    0x74726f56
 219 #define signature_VORTEX_ecx    0x436f5320
 220 #define signature_VORTEX_edx    0x36387865
 221
 222 #define signature_SHANGHAI_ebx  0x68532020
 223 #define signature_SHANGHAI_ecx  0x20206961
 224 #define signature_SHANGHAI_edx  0x68676e61
 225
 226 #ifndef __x86_64__
 227 /* At least one cpu (Winchip 2) does not set %ebx and %ecx
 228    for cpuid leaf 1. Forcibly zero the two registers before
 229    calling cpuid as a precaution.  */
 230 #define __cpuid(level, a, b, c, d)                                      \
 231   do {                                                                  \
 232     if (__builtin_constant_p (level) && (level) != 1)                   \
 233       __asm__ __volatile__ ("cpuid\n\t"                                 \
 234                             : "=a" (a), "=b" (b), "=c" (c), "=d" (d)    \
 235                             : "0" (level));                             \
 236     else                                                                \
 237       __asm__ __volatile__ ("cpuid\n\t"                                 \
 238                             : "=a" (a), "=b" (b), "=c" (c), "=d" (d)    \
 239                             : "0" (level), "1" (0), "2" (0));           \
 240   } while (0)
 241 #else
 242 #define __cpuid(level, a, b, c, d)                                      \
 243   __asm__ __volatile__ ("cpuid\n\t"                                     \
 244                         : "=a" (a), "=b" (b), "=c" (c), "=d" (d)        \
 245                         : "0" (level))
 246 #endif
 247
 248 #define __cpuid_count(level, count, a, b, c, d)                         \
 249   __asm__ __volatile__ ("cpuid\n\t"                                     \
 250                         : "=a" (a), "=b" (b), "=c" (c), "=d" (d)        \
 251                         : "0" (level), "2" (count))
 252
 253
 254 /* Return highest supported input value for cpuid instruction.  ext can
 255    be either 0x0 or 0x80000000 to return highest supported value for
 256    basic or extended cpuid information.  Function returns 0 if cpuid
 257    is not supported or whatever cpuid returns in eax register.  If sig
 258    pointer is non-null, then first four bytes of the signature
 259    (as found in ebx register) are returned in location pointed by sig.  */
 260
 261 static __inline unsigned int
 262 __get_cpuid_max (unsigned int __ext, unsigned int *__sig)
 263 {
 264   unsigned int __eax, __ebx, __ecx, __edx;
 265
 266 #ifndef __x86_64__
 267   /* See if we can use cpuid.  On AMD64 we always can.  */
 268 #if __GNUC__ >= 3
 269   __asm__ ("pushf{l|d}\n\t"
 270            "pushf{l|d}\n\t"
 271            "pop{l}\t%0\n\t"
 272            "mov{l}\t{%0, %1|%1, %0}\n\t"
 273            "xor{l}\t{%2, %0|%0, %2}\n\t"
 274            "push{l}\t%0\n\t"
 275            "popf{l|d}\n\t"
 276            "pushf{l|d}\n\t"
 277            "pop{l}\t%0\n\t"
 278            "popf{l|d}\n\t"
 279            : "=&r" (__eax), "=&r" (__ebx)
 280            : "i" (0x00200000));
 281 #else
 282 /* Host GCCs older than 3.0 weren't supporting Intel asm syntax
 283    nor alternatives in i386 code.  */
 284   __asm__ ("pushfl\n\t"
 285            "pushfl\n\t"
 286            "popl\t%0\n\t"
 287            "movl\t%0, %1\n\t"
 288            "xorl\t%2, %0\n\t"
 289            "pushl\t%0\n\t"
 290            "popfl\n\t"
 291            "pushfl\n\t"
 292            "popl\t%0\n\t"
 293            "popfl\n\t"
 294            : "=&r" (__eax), "=&r" (__ebx)
 295            : "i" (0x00200000));
 296 #endif
 297
 298   if (__builtin_expect (!((__eax ^ __ebx) & 0x00200000), 0))
 299     return 0;
 300 #endif
 301
 302   /* Host supports cpuid.  Return highest supported cpuid input value.  */
 303   __cpuid (__ext, __eax, __ebx, __ecx, __edx);
 304
 305   if (__sig)
 306     *__sig = __ebx;
 307
 308   return __eax;
 309 }
 310
 311 /* Return cpuid data for requested cpuid leaf, as found in returned
 312    eax, ebx, ecx and edx registers.  The function checks if cpuid is
 313    supported and returns 1 for valid cpuid information or 0 for
 314    unsupported cpuid leaf.  All pointers are required to be non-null.  */
 315
 316 static __inline int
 317 __get_cpuid (unsigned int __leaf,
 318              unsigned int *__eax, unsigned int *__ebx,
 319              unsigned int *__ecx, unsigned int *__edx)
 320 {
 321   unsigned int __ext = __leaf & 0x80000000;
 322   unsigned int __maxlevel = __get_cpuid_max (__ext, 0);
 323
 324   if (__maxlevel == 0 || __maxlevel < __leaf)
 325     return 0;
 326
 327   __cpuid (__leaf, *__eax, *__ebx, *__ecx, *__edx);
 328   return 1;
 329 }
 330
 331 /* Same as above, but sub-leaf can be specified.  */
 332
 333 static __inline int
 334 __get_cpuid_count (unsigned int __leaf, unsigned int __subleaf,
 335                    unsigned int *__eax, unsigned int *__ebx,
 336                    unsigned int *__ecx, unsigned int *__edx)
 337 {
 338   unsigned int __ext = __leaf & 0x80000000;
 339   unsigned int __maxlevel = __get_cpuid_max (__ext, 0);
 340
 341   if (__builtin_expect (__maxlevel == 0, 0) || __maxlevel < __leaf)
 342     return 0;
 343
 344   __cpuid_count (__leaf, __subleaf, *__eax, *__ebx, *__ecx, *__edx);
 345   return 1;
 346 }
 347
 348 static __inline void
 349 __cpuidex (int __cpuid_info[4], int __leaf, int __subleaf)
 350 {
 351   __cpuid_count (__leaf, __subleaf, __cpuid_info[0], __cpuid_info[1],
 352                  __cpuid_info[2], __cpuid_info[3]);
 353 }
 354
 355 #endif /* _CPUID_H_INCLUDED */