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