1/*===---- cpuid.h - X86 cpu model detection --------------------------------=== 2 * 3 * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 * See https://llvm.org/LICENSE.txt for license information. 5 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 * 7 *===-----------------------------------------------------------------------=== 8 */ 9 10#ifndef __CPUID_H 11#define __CPUID_H 12 13#if !(__x86_64__ || __i386__) 14#error this header is for x86 only 15#endif 16 17/* Responses identification request with %eax 0 */ 18/* AMD: "AuthenticAMD" */ 19#define signature_AMD_ebx 0x68747541 20#define signature_AMD_edx 0x69746e65 21#define signature_AMD_ecx 0x444d4163 22/* CENTAUR: "CentaurHauls" */ 23#define signature_CENTAUR_ebx 0x746e6543 24#define signature_CENTAUR_edx 0x48727561 25#define signature_CENTAUR_ecx 0x736c7561 26/* CYRIX: "CyrixInstead" */ 27#define signature_CYRIX_ebx 0x69727943 28#define signature_CYRIX_edx 0x736e4978 29#define signature_CYRIX_ecx 0x64616574 30/* HYGON: "HygonGenuine" */ 31#define signature_HYGON_ebx 0x6f677948 32#define signature_HYGON_edx 0x6e65476e 33#define signature_HYGON_ecx 0x656e6975 34/* INTEL: "GenuineIntel" */ 35#define signature_INTEL_ebx 0x756e6547 36#define signature_INTEL_edx 0x49656e69 37#define signature_INTEL_ecx 0x6c65746e 38/* TM1: "TransmetaCPU" */ 39#define signature_TM1_ebx 0x6e617254 40#define signature_TM1_edx 0x74656d73 41#define signature_TM1_ecx 0x55504361 42/* TM2: "GenuineTMx86" */ 43#define signature_TM2_ebx 0x756e6547 44#define signature_TM2_edx 0x54656e69 45#define signature_TM2_ecx 0x3638784d 46/* NSC: "Geode by NSC" */ 47#define signature_NSC_ebx 0x646f6547 48#define signature_NSC_edx 0x79622065 49#define signature_NSC_ecx 0x43534e20 50/* NEXGEN: "NexGenDriven" */ 51#define signature_NEXGEN_ebx 0x4778654e 52#define signature_NEXGEN_edx 0x72446e65 53#define signature_NEXGEN_ecx 0x6e657669 54/* RISE: "RiseRiseRise" */ 55#define signature_RISE_ebx 0x65736952 56#define signature_RISE_edx 0x65736952 57#define signature_RISE_ecx 0x65736952 58/* SIS: "SiS SiS SiS " */ 59#define signature_SIS_ebx 0x20536953 60#define signature_SIS_edx 0x20536953 61#define signature_SIS_ecx 0x20536953 62/* UMC: "UMC UMC UMC " */ 63#define signature_UMC_ebx 0x20434d55 64#define signature_UMC_edx 0x20434d55 65#define signature_UMC_ecx 0x20434d55 66/* VIA: "VIA VIA VIA " */ 67#define signature_VIA_ebx 0x20414956 68#define signature_VIA_edx 0x20414956 69#define signature_VIA_ecx 0x20414956 70/* VORTEX: "Vortex86 SoC" */ 71#define signature_VORTEX_ebx 0x74726f56 72#define signature_VORTEX_edx 0x36387865 73#define signature_VORTEX_ecx 0x436f5320 74 75/* Features in %ecx for leaf 1 */ 76#define bit_SSE3 0x00000001 77#define bit_PCLMULQDQ 0x00000002 78#define bit_PCLMUL bit_PCLMULQDQ /* for gcc compat */ 79#define bit_DTES64 0x00000004 80#define bit_MONITOR 0x00000008 81#define bit_DSCPL 0x00000010 82#define bit_VMX 0x00000020 83#define bit_SMX 0x00000040 84#define bit_EIST 0x00000080 85#define bit_TM2 0x00000100 86#define bit_SSSE3 0x00000200 87#define bit_CNXTID 0x00000400 88#define bit_FMA 0x00001000 89#define bit_CMPXCHG16B 0x00002000 90#define bit_xTPR 0x00004000 91#define bit_PDCM 0x00008000 92#define bit_PCID 0x00020000 93#define bit_DCA 0x00040000 94#define bit_SSE41 0x00080000 95#define bit_SSE4_1 bit_SSE41 /* for gcc compat */ 96#define bit_SSE42 0x00100000 97#define bit_SSE4_2 bit_SSE42 /* for gcc compat */ 98#define bit_x2APIC 0x00200000 99#define bit_MOVBE 0x00400000 100#define bit_POPCNT 0x00800000 101#define bit_TSCDeadline 0x01000000 102#define bit_AESNI 0x02000000 103#define bit_AES bit_AESNI /* for gcc compat */ 104#define bit_XSAVE 0x04000000 105#define bit_OSXSAVE 0x08000000 106#define bit_AVX 0x10000000 107#define bit_F16C 0x20000000 108#define bit_RDRND 0x40000000 109 110/* Features in %edx for leaf 1 */ 111#define bit_FPU 0x00000001 112#define bit_VME 0x00000002 113#define bit_DE 0x00000004 114#define bit_PSE 0x00000008 115#define bit_TSC 0x00000010 116#define bit_MSR 0x00000020 117#define bit_PAE 0x00000040 118#define bit_MCE 0x00000080 119#define bit_CX8 0x00000100 120#define bit_CMPXCHG8B bit_CX8 /* for gcc compat */ 121#define bit_APIC 0x00000200 122#define bit_SEP 0x00000800 123#define bit_MTRR 0x00001000 124#define bit_PGE 0x00002000 125#define bit_MCA 0x00004000 126#define bit_CMOV 0x00008000 127#define bit_PAT 0x00010000 128#define bit_PSE36 0x00020000 129#define bit_PSN 0x00040000 130#define bit_CLFSH 0x00080000 131#define bit_DS 0x00200000 132#define bit_ACPI 0x00400000 133#define bit_MMX 0x00800000 134#define bit_FXSR 0x01000000 135#define bit_FXSAVE bit_FXSR /* for gcc compat */ 136#define bit_SSE 0x02000000 137#define bit_SSE2 0x04000000 138#define bit_SS 0x08000000 139#define bit_HTT 0x10000000 140#define bit_TM 0x20000000 141#define bit_PBE 0x80000000 142 143/* Features in %ebx for leaf 7 sub-leaf 0 */ 144#define bit_FSGSBASE 0x00000001 145#define bit_SGX 0x00000004 146#define bit_BMI 0x00000008 147#define bit_HLE 0x00000010 148#define bit_AVX2 0x00000020 149#define bit_SMEP 0x00000080 150#define bit_BMI2 0x00000100 151#define bit_ENH_MOVSB 0x00000200 152#define bit_INVPCID 0x00000400 153#define bit_RTM 0x00000800 154#define bit_MPX 0x00004000 155#define bit_AVX512F 0x00010000 156#define bit_AVX512DQ 0x00020000 157#define bit_RDSEED 0x00040000 158#define bit_ADX 0x00080000 159#define bit_AVX512IFMA 0x00200000 160#define bit_CLFLUSHOPT 0x00800000 161#define bit_CLWB 0x01000000 162#define bit_AVX512PF 0x04000000 163#define bit_AVX512ER 0x08000000 164#define bit_AVX512CD 0x10000000 165#define bit_SHA 0x20000000 166#define bit_AVX512BW 0x40000000 167#define bit_AVX512VL 0x80000000 168 169/* Features in %ecx for leaf 7 sub-leaf 0 */ 170#define bit_PREFTCHWT1 0x00000001 171#define bit_AVX512VBMI 0x00000002 172#define bit_PKU 0x00000004 173#define bit_OSPKE 0x00000010 174#define bit_WAITPKG 0x00000020 175#define bit_AVX512VBMI2 0x00000040 176#define bit_SHSTK 0x00000080 177#define bit_GFNI 0x00000100 178#define bit_VAES 0x00000200 179#define bit_VPCLMULQDQ 0x00000400 180#define bit_AVX512VNNI 0x00000800 181#define bit_AVX512BITALG 0x00001000 182#define bit_AVX512VPOPCNTDQ 0x00004000 183#define bit_RDPID 0x00400000 184#define bit_CLDEMOTE 0x02000000 185#define bit_MOVDIRI 0x08000000 186#define bit_MOVDIR64B 0x10000000 187#define bit_ENQCMD 0x20000000 188 189/* Features in %edx for leaf 7 sub-leaf 0 */ 190#define bit_AVX5124VNNIW 0x00000004 191#define bit_AVX5124FMAPS 0x00000008 192#define bit_UINTR 0x00000020 193#define bit_SERIALIZE 0x00004000 194#define bit_TSXLDTRK 0x00010000 195#define bit_PCONFIG 0x00040000 196#define bit_IBT 0x00100000 197#define bit_AMXBF16 0x00400000 198#define bit_AVX512FP16 0x00800000 199#define bit_AMXTILE 0x01000000 200#define bit_AMXINT8 0x02000000 201 202/* Features in %eax for leaf 7 sub-leaf 1 */ 203#define bit_RAOINT 0x00000008 204#define bit_AVXVNNI 0x00000010 205#define bit_AVX512BF16 0x00000020 206#define bit_CMPCCXADD 0x00000080 207#define bit_AMXFP16 0x00200000 208#define bit_HRESET 0x00400000 209#define bit_AVXIFMA 0x00800000 210 211/* Features in %edx for leaf 7 sub-leaf 1 */ 212#define bit_AVXVNNIINT8 0x00000010 213#define bit_AVXNECONVERT 0x00000020 214#define bit_PREFETCHI 0x00004000 215 216/* Features in %eax for leaf 13 sub-leaf 1 */ 217#define bit_XSAVEOPT 0x00000001 218#define bit_XSAVEC 0x00000002 219#define bit_XSAVES 0x00000008 220 221/* Features in %eax for leaf 0x14 sub-leaf 0 */ 222#define bit_PTWRITE 0x00000010 223 224/* Features in %ecx for leaf 0x80000001 */ 225#define bit_LAHF_LM 0x00000001 226#define bit_ABM 0x00000020 227#define bit_LZCNT bit_ABM /* for gcc compat */ 228#define bit_SSE4a 0x00000040 229#define bit_PRFCHW 0x00000100 230#define bit_XOP 0x00000800 231#define bit_LWP 0x00008000 232#define bit_FMA4 0x00010000 233#define bit_TBM 0x00200000 234#define bit_MWAITX 0x20000000 235 236/* Features in %edx for leaf 0x80000001 */ 237#define bit_MMXEXT 0x00400000 238#define bit_LM 0x20000000 239#define bit_3DNOWP 0x40000000 240#define bit_3DNOW 0x80000000 241 242/* Features in %ebx for leaf 0x80000008 */ 243#define bit_CLZERO 0x00000001 244#define bit_RDPRU 0x00000010 245#define bit_WBNOINVD 0x00000200 246 247 248#if __i386__ 249#define __cpuid(__leaf, __eax, __ebx, __ecx, __edx) \ 250 __asm("cpuid" : "=a"(__eax), "=b" (__ebx), "=c"(__ecx), "=d"(__edx) \ 251 : "0"(__leaf)) 252 253#define __cpuid_count(__leaf, __count, __eax, __ebx, __ecx, __edx) \ 254 __asm("cpuid" : "=a"(__eax), "=b" (__ebx), "=c"(__ecx), "=d"(__edx) \ 255 : "0"(__leaf), "2"(__count)) 256#else 257/* x86-64 uses %rbx as the base register, so preserve it. */ 258#define __cpuid(__leaf, __eax, __ebx, __ecx, __edx) \ 259 __asm(" xchgq %%rbx,%q1\n" \ 260 " cpuid\n" \ 261 " xchgq %%rbx,%q1" \ 262 : "=a"(__eax), "=r" (__ebx), "=c"(__ecx), "=d"(__edx) \ 263 : "0"(__leaf)) 264 265#define __cpuid_count(__leaf, __count, __eax, __ebx, __ecx, __edx) \ 266 __asm(" xchgq %%rbx,%q1\n" \ 267 " cpuid\n" \ 268 " xchgq %%rbx,%q1" \ 269 : "=a"(__eax), "=r" (__ebx), "=c"(__ecx), "=d"(__edx) \ 270 : "0"(__leaf), "2"(__count)) 271#endif 272 273static __inline unsigned int __get_cpuid_max (unsigned int __leaf, 274 unsigned int *__sig) 275{ 276 unsigned int __eax, __ebx, __ecx, __edx; 277#if __i386__ 278 int __cpuid_supported; 279 280 __asm(" pushfl\n" 281 " popl %%eax\n" 282 " movl %%eax,%%ecx\n" 283 " xorl $0x00200000,%%eax\n" 284 " pushl %%eax\n" 285 " popfl\n" 286 " pushfl\n" 287 " popl %%eax\n" 288 " movl $0,%0\n" 289 " cmpl %%eax,%%ecx\n" 290 " je 1f\n" 291 " movl $1,%0\n" 292 "1:" 293 : "=r" (__cpuid_supported) : : "eax", "ecx"); 294 if (!__cpuid_supported) 295 return 0; 296#endif 297 298 __cpuid(__leaf, __eax, __ebx, __ecx, __edx); 299 if (__sig) 300 *__sig = __ebx; 301 return __eax; 302} 303 304static __inline int __get_cpuid (unsigned int __leaf, unsigned int *__eax, 305 unsigned int *__ebx, unsigned int *__ecx, 306 unsigned int *__edx) 307{ 308 unsigned int __max_leaf = __get_cpuid_max(__leaf & 0x80000000, 0); 309 310 if (__max_leaf == 0 || __max_leaf < __leaf) 311 return 0; 312 313 __cpuid(__leaf, *__eax, *__ebx, *__ecx, *__edx); 314 return 1; 315} 316 317static __inline int __get_cpuid_count (unsigned int __leaf, 318 unsigned int __subleaf, 319 unsigned int *__eax, unsigned int *__ebx, 320 unsigned int *__ecx, unsigned int *__edx) 321{ 322 unsigned int __max_leaf = __get_cpuid_max(__leaf & 0x80000000, 0); 323 324 if (__max_leaf == 0 || __max_leaf < __leaf) 325 return 0; 326 327 __cpuid_count(__leaf, __subleaf, *__eax, *__ebx, *__ecx, *__edx); 328 return 1; 329} 330 331#endif /* __CPUID_H */ 332