cpuid.h revision 360784
167754Smsmith/*===---- cpuid.h - X86 cpu model detection --------------------------------=== 267754Smsmith * 367754Smsmith * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 467754Smsmith * See https://llvm.org/LICENSE.txt for license information. 567754Smsmith * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 667754Smsmith * 7217365Sjkim *===-----------------------------------------------------------------------=== 8245582Sjkim */ 970243Smsmith 1067754Smsmith#if !(__x86_64__ || __i386__) 11217365Sjkim#error this header is for x86 only 12217365Sjkim#endif 13217365Sjkim 14217365Sjkim/* Responses identification request with %eax 0 */ 15217365Sjkim/* AMD: "AuthenticAMD" */ 16217365Sjkim#define signature_AMD_ebx 0x68747541 17217365Sjkim#define signature_AMD_edx 0x69746e65 18217365Sjkim#define signature_AMD_ecx 0x444d4163 19217365Sjkim/* CENTAUR: "CentaurHauls" */ 20217365Sjkim#define signature_CENTAUR_ebx 0x746e6543 21217365Sjkim#define signature_CENTAUR_edx 0x48727561 22217365Sjkim#define signature_CENTAUR_ecx 0x736c7561 23217365Sjkim/* CYRIX: "CyrixInstead" */ 24217365Sjkim#define signature_CYRIX_ebx 0x69727943 2567754Smsmith#define signature_CYRIX_edx 0x736e4978 26217365Sjkim#define signature_CYRIX_ecx 0x64616574 27217365Sjkim/* INTEL: "GenuineIntel" */ 28217365Sjkim#define signature_INTEL_ebx 0x756e6547 2967754Smsmith#define signature_INTEL_edx 0x49656e69 30217365Sjkim#define signature_INTEL_ecx 0x6c65746e 31217365Sjkim/* TM1: "TransmetaCPU" */ 32217365Sjkim#define signature_TM1_ebx 0x6e617254 33217365Sjkim#define signature_TM1_edx 0x74656d73 34217365Sjkim#define signature_TM1_ecx 0x55504361 35217365Sjkim/* TM2: "GenuineTMx86" */ 36217365Sjkim#define signature_TM2_ebx 0x756e6547 37217365Sjkim#define signature_TM2_edx 0x54656e69 38217365Sjkim#define signature_TM2_ecx 0x3638784d 39217365Sjkim/* NSC: "Geode by NSC" */ 40217365Sjkim#define signature_NSC_ebx 0x646f6547 41217365Sjkim#define signature_NSC_edx 0x79622065 42217365Sjkim#define signature_NSC_ecx 0x43534e20 4367754Smsmith/* NEXGEN: "NexGenDriven" */ 4467754Smsmith#define signature_NEXGEN_ebx 0x4778654e 4567754Smsmith#define signature_NEXGEN_edx 0x72446e65 4667754Smsmith#define signature_NEXGEN_ecx 0x6e657669 47193341Sjkim/* RISE: "RiseRiseRise" */ 48193341Sjkim#define signature_RISE_ebx 0x65736952 49193341Sjkim#define signature_RISE_edx 0x65736952 50193341Sjkim#define signature_RISE_ecx 0x65736952 5167754Smsmith/* SIS: "SiS SiS SiS " */ 5267754Smsmith#define signature_SIS_ebx 0x20536953 5377424Smsmith#define signature_SIS_edx 0x20536953 5491116Smsmith#define signature_SIS_ecx 0x20536953 5567754Smsmith/* UMC: "UMC UMC UMC " */ 5667754Smsmith#define signature_UMC_ebx 0x20434d55 5767754Smsmith#define signature_UMC_edx 0x20434d55 5867754Smsmith#define signature_UMC_ecx 0x20434d55 59151937Sjkim/* VIA: "VIA VIA VIA " */ 60151937Sjkim#define signature_VIA_ebx 0x20414956 61151937Sjkim#define signature_VIA_edx 0x20414956 62151937Sjkim#define signature_VIA_ecx 0x20414956 63151937Sjkim/* VORTEX: "Vortex86 SoC" */ 64151937Sjkim#define signature_VORTEX_ebx 0x74726f56 65151937Sjkim#define signature_VORTEX_edx 0x36387865 66151937Sjkim#define signature_VORTEX_ecx 0x436f5320 67151937Sjkim 68151937Sjkim/* Features in %ecx for leaf 1 */ 69151937Sjkim#define bit_SSE3 0x00000001 70151937Sjkim#define bit_PCLMULQDQ 0x00000002 71151937Sjkim#define bit_PCLMUL bit_PCLMULQDQ /* for gcc compat */ 72151937Sjkim#define bit_DTES64 0x00000004 73151937Sjkim#define bit_MONITOR 0x00000008 74151937Sjkim#define bit_DSCPL 0x00000010 75193267Sjkim#define bit_VMX 0x00000020 76151937Sjkim#define bit_SMX 0x00000040 77151937Sjkim#define bit_EIST 0x00000080 78151937Sjkim#define bit_TM2 0x00000100 79167802Sjkim#define bit_SSSE3 0x00000200 80167802Sjkim#define bit_CNXTID 0x00000400 81167802Sjkim#define bit_FMA 0x00001000 82151937Sjkim#define bit_CMPXCHG16B 0x00002000 83151937Sjkim#define bit_xTPR 0x00004000 84151937Sjkim#define bit_PDCM 0x00008000 85151937Sjkim#define bit_PCID 0x00020000 86151937Sjkim#define bit_DCA 0x00040000 87151937Sjkim#define bit_SSE41 0x00080000 88193267Sjkim#define bit_SSE4_1 bit_SSE41 /* for gcc compat */ 89151937Sjkim#define bit_SSE42 0x00100000 90151937Sjkim#define bit_SSE4_2 bit_SSE42 /* for gcc compat */ 91151937Sjkim#define bit_x2APIC 0x00200000 92151937Sjkim#define bit_MOVBE 0x00400000 93151937Sjkim#define bit_POPCNT 0x00800000 94151937Sjkim#define bit_TSCDeadline 0x01000000 95151937Sjkim#define bit_AESNI 0x02000000 96151937Sjkim#define bit_AES bit_AESNI /* for gcc compat */ 97151937Sjkim#define bit_XSAVE 0x04000000 98151937Sjkim#define bit_OSXSAVE 0x08000000 99151937Sjkim#define bit_AVX 0x10000000 100151937Sjkim#define bit_F16C 0x20000000 101151937Sjkim#define bit_RDRND 0x40000000 102151937Sjkim 103151937Sjkim/* Features in %edx for leaf 1 */ 104151937Sjkim#define bit_FPU 0x00000001 105151937Sjkim#define bit_VME 0x00000002 106151937Sjkim#define bit_DE 0x00000004 107151937Sjkim#define bit_PSE 0x00000008 108151937Sjkim#define bit_TSC 0x00000010 109151937Sjkim#define bit_MSR 0x00000020 110151937Sjkim#define bit_PAE 0x00000040 111151937Sjkim#define bit_MCE 0x00000080 112151937Sjkim#define bit_CX8 0x00000100 113151937Sjkim#define bit_CMPXCHG8B bit_CX8 /* for gcc compat */ 114151937Sjkim#define bit_APIC 0x00000200 115151937Sjkim#define bit_SEP 0x00000800 116151937Sjkim#define bit_MTRR 0x00001000 117193267Sjkim#define bit_PGE 0x00002000 118151937Sjkim#define bit_MCA 0x00004000 119151937Sjkim#define bit_CMOV 0x00008000 120151937Sjkim#define bit_PAT 0x00010000 121167802Sjkim#define bit_PSE36 0x00020000 122167802Sjkim#define bit_PSN 0x00040000 123167802Sjkim#define bit_CLFSH 0x00080000 124151937Sjkim#define bit_DS 0x00200000 125151937Sjkim#define bit_ACPI 0x00400000 126151937Sjkim#define bit_MMX 0x00800000 127151937Sjkim#define bit_FXSR 0x01000000 128193267Sjkim#define bit_FXSAVE bit_FXSR /* for gcc compat */ 129151937Sjkim#define bit_SSE 0x02000000 130151937Sjkim#define bit_SSE2 0x04000000 131151937Sjkim#define bit_SS 0x08000000 132151937Sjkim#define bit_HTT 0x10000000 133151937Sjkim#define bit_TM 0x20000000 134151937Sjkim#define bit_PBE 0x80000000 135151937Sjkim 136151937Sjkim/* Features in %ebx for leaf 7 sub-leaf 0 */ 137151937Sjkim#define bit_FSGSBASE 0x00000001 138151937Sjkim#define bit_SGX 0x00000004 139151937Sjkim#define bit_BMI 0x00000008 140151937Sjkim#define bit_HLE 0x00000010 141151937Sjkim#define bit_AVX2 0x00000020 142151937Sjkim#define bit_SMEP 0x00000080 143151937Sjkim#define bit_BMI2 0x00000100 144151937Sjkim#define bit_ENH_MOVSB 0x00000200 145151937Sjkim#define bit_INVPCID 0x00000400 146151937Sjkim#define bit_RTM 0x00000800 147151937Sjkim#define bit_MPX 0x00004000 148151937Sjkim#define bit_AVX512F 0x00010000 149151937Sjkim#define bit_AVX512DQ 0x00020000 150151937Sjkim#define bit_RDSEED 0x00040000 151151937Sjkim#define bit_ADX 0x00080000 152151937Sjkim#define bit_AVX512IFMA 0x00200000 153151937Sjkim#define bit_CLFLUSHOPT 0x00800000 154151937Sjkim#define bit_CLWB 0x01000000 155151937Sjkim#define bit_AVX512PF 0x04000000 156151937Sjkim#define bit_AVX512ER 0x08000000 157151937Sjkim#define bit_AVX512CD 0x10000000 158151937Sjkim#define bit_SHA 0x20000000 159193267Sjkim#define bit_AVX512BW 0x40000000 160151937Sjkim#define bit_AVX512VL 0x80000000 161151937Sjkim 162167802Sjkim/* Features in %ecx for leaf 7 sub-leaf 0 */ 163167802Sjkim#define bit_PREFTCHWT1 0x00000001 164167802Sjkim#define bit_AVX512VBMI 0x00000002 165151937Sjkim#define bit_PKU 0x00000004 166151937Sjkim#define bit_OSPKE 0x00000010 167151937Sjkim#define bit_WAITPKG 0x00000020 168151937Sjkim#define bit_AVX512VBMI2 0x00000040 169151937Sjkim#define bit_SHSTK 0x00000080 170151937Sjkim#define bit_GFNI 0x00000100 171151937Sjkim#define bit_VAES 0x00000200 172151937Sjkim#define bit_VPCLMULQDQ 0x00000400 173151937Sjkim#define bit_AVX512VNNI 0x00000800 174151937Sjkim#define bit_AVX512BITALG 0x00001000 175151937Sjkim#define bit_AVX512VPOPCNTDQ 0x00004000 176228110Sjkim#define bit_RDPID 0x00400000 177228110Sjkim#define bit_CLDEMOTE 0x02000000 178228110Sjkim#define bit_MOVDIRI 0x08000000 179250838Sjkim#define bit_MOVDIR64B 0x10000000 180151937Sjkim#define bit_ENQCMD 0x20000000 181151937Sjkim 182151937Sjkim/* Features in %edx for leaf 7 sub-leaf 0 */ 183151937Sjkim#define bit_AVX5124VNNIW 0x00000004 184151937Sjkim#define bit_AVX5124FMAPS 0x00000008 185238381Sjkim#define bit_PCONFIG 0x00040000 186151937Sjkim#define bit_IBT 0x00100000 187151937Sjkim 188151937Sjkim/* Features in %eax for leaf 7 sub-leaf 1 */ 189228110Sjkim#define bit_AVX512BF16 0x00000020 190250838Sjkim 191167802Sjkim/* Features in %eax for leaf 13 sub-leaf 1 */ 192167802Sjkim#define bit_XSAVEOPT 0x00000001 193151937Sjkim#define bit_XSAVEC 0x00000002 194151937Sjkim#define bit_XSAVES 0x00000008 195151937Sjkim 196252279Sjkim/* Features in %eax for leaf 0x14 sub-leaf 0 */ 197167802Sjkim#define bit_PTWRITE 0x00000010 198167802Sjkim 199151937Sjkim/* Features in %ecx for leaf 0x80000001 */ 200151937Sjkim#define bit_LAHF_LM 0x00000001 201151937Sjkim#define bit_ABM 0x00000020 202250838Sjkim#define bit_LZCNT bit_ABM /* for gcc compat */ 203167802Sjkim#define bit_SSE4a 0x00000040 204167802Sjkim#define bit_PRFCHW 0x00000100 205151937Sjkim#define bit_XOP 0x00000800 206151937Sjkim#define bit_LWP 0x00008000 207151937Sjkim#define bit_FMA4 0x00010000 208250838Sjkim#define bit_TBM 0x00200000 209151937Sjkim#define bit_MWAITX 0x20000000 210151937Sjkim 211151937Sjkim/* Features in %edx for leaf 0x80000001 */ 212151937Sjkim#define bit_MMXEXT 0x00400000 213151937Sjkim#define bit_LM 0x20000000 214151937Sjkim#define bit_3DNOWP 0x40000000 215151937Sjkim#define bit_3DNOW 0x80000000 216151937Sjkim 217151937Sjkim/* Features in %ebx for leaf 0x80000008 */ 218151937Sjkim#define bit_CLZERO 0x00000001 219151937Sjkim#define bit_WBNOINVD 0x00000200 220151937Sjkim 221151937Sjkim 222151937Sjkim#if __i386__ 223151937Sjkim#define __cpuid(__leaf, __eax, __ebx, __ecx, __edx) \ 224151937Sjkim __asm("cpuid" : "=a"(__eax), "=b" (__ebx), "=c"(__ecx), "=d"(__edx) \ 225151937Sjkim : "0"(__leaf)) 226151937Sjkim 227151937Sjkim#define __cpuid_count(__leaf, __count, __eax, __ebx, __ecx, __edx) \ 228151937Sjkim __asm("cpuid" : "=a"(__eax), "=b" (__ebx), "=c"(__ecx), "=d"(__edx) \ 229151937Sjkim : "0"(__leaf), "2"(__count)) 230151937Sjkim#else 231151937Sjkim/* x86-64 uses %rbx as the base register, so preserve it. */ 232151937Sjkim#define __cpuid(__leaf, __eax, __ebx, __ecx, __edx) \ 233151937Sjkim __asm(" xchgq %%rbx,%q1\n" \ 234151937Sjkim " cpuid\n" \ 235151937Sjkim " xchgq %%rbx,%q1" \ 236151937Sjkim : "=a"(__eax), "=r" (__ebx), "=c"(__ecx), "=d"(__edx) \ 237151937Sjkim : "0"(__leaf)) 238151937Sjkim 239151937Sjkim#define __cpuid_count(__leaf, __count, __eax, __ebx, __ecx, __edx) \ 240151937Sjkim __asm(" xchgq %%rbx,%q1\n" \ 241151937Sjkim " cpuid\n" \ 242151937Sjkim " xchgq %%rbx,%q1" \ 243167802Sjkim : "=a"(__eax), "=r" (__ebx), "=c"(__ecx), "=d"(__edx) \ 244151937Sjkim : "0"(__leaf), "2"(__count)) 245167802Sjkim#endif 246167802Sjkim 247167802Sjkimstatic __inline int __get_cpuid_max (unsigned int __leaf, unsigned int *__sig) 248167802Sjkim{ 249167802Sjkim unsigned int __eax, __ebx, __ecx, __edx; 250151937Sjkim#if __i386__ 251151937Sjkim int __cpuid_supported; 252167802Sjkim 253151937Sjkim __asm(" pushfl\n" 254151937Sjkim " popl %%eax\n" 255151937Sjkim " movl %%eax,%%ecx\n" 256151937Sjkim " xorl $0x00200000,%%eax\n" 257151937Sjkim " pushl %%eax\n" 258167802Sjkim " popfl\n" 259151937Sjkim " pushfl\n" 260151937Sjkim " popl %%eax\n" 261151937Sjkim " movl $0,%0\n" 262151937Sjkim " cmpl %%eax,%%ecx\n" 263151937Sjkim " je 1f\n" 264151937Sjkim " movl $1,%0\n" 265151937Sjkim "1:" 266151937Sjkim : "=r" (__cpuid_supported) : : "eax", "ecx"); 267151937Sjkim if (!__cpuid_supported) 268151937Sjkim return 0; 269151937Sjkim#endif 270151937Sjkim 271151937Sjkim __cpuid(__leaf, __eax, __ebx, __ecx, __edx); 272151937Sjkim if (__sig) 273151937Sjkim *__sig = __ebx; 274151937Sjkim return __eax; 275151937Sjkim} 276151937Sjkim 277151937Sjkimstatic __inline int __get_cpuid (unsigned int __leaf, unsigned int *__eax, 278151937Sjkim unsigned int *__ebx, unsigned int *__ecx, 279151937Sjkim unsigned int *__edx) 280151937Sjkim{ 281151937Sjkim unsigned int __max_leaf = __get_cpuid_max(__leaf & 0x80000000, 0); 282151937Sjkim 283151937Sjkim if (__max_leaf == 0 || __max_leaf < __leaf) 284151937Sjkim return 0; 285151937Sjkim 286151937Sjkim __cpuid(__leaf, *__eax, *__ebx, *__ecx, *__edx); 287151937Sjkim return 1; 288151937Sjkim} 289151937Sjkim 290151937Sjkimstatic __inline int __get_cpuid_count (unsigned int __leaf, 291151937Sjkim unsigned int __subleaf, 292151937Sjkim unsigned int *__eax, unsigned int *__ebx, 293151937Sjkim unsigned int *__ecx, unsigned int *__edx) 294151937Sjkim{ 295151937Sjkim unsigned int __max_leaf = __get_cpuid_max(__leaf & 0x80000000, 0); 296151937Sjkim 297167802Sjkim if (__max_leaf == 0 || __max_leaf < __leaf) 298151937Sjkim return 0; 299151937Sjkim 300151937Sjkim __cpuid_count(__leaf, __subleaf, *__eax, *__ebx, *__ecx, *__edx); 301151937Sjkim return 1; 302151937Sjkim} 303151937Sjkim