cpuid.h
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/*===---- cpuid.h - X86 cpu model detection --------------------------------===
*
* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
* See https://llvm.org/LICENSE.txt for license information.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*
*===-----------------------------------------------------------------------===
*/
#if !(__x86_64__ || __i386__)
#error this header is for x86 only
#endif
/* Responses identification request with %eax 0 */
/* AMD: "AuthenticAMD" */
#define signature_AMD_ebx 0x68747541
#define signature_AMD_edx 0x69746e65
#define signature_AMD_ecx 0x444d4163
/* CENTAUR: "CentaurHauls" */
#define signature_CENTAUR_ebx 0x746e6543
#define signature_CENTAUR_edx 0x48727561
#define signature_CENTAUR_ecx 0x736c7561
/* CYRIX: "CyrixInstead" */
#define signature_CYRIX_ebx 0x69727943
#define signature_CYRIX_edx 0x736e4978
#define signature_CYRIX_ecx 0x64616574
/* HYGON: "HygonGenuine" */
#define signature_HYGON_ebx 0x6f677948
#define signature_HYGON_edx 0x6e65476e
#define signature_HYGON_ecx 0x656e6975
/* INTEL: "GenuineIntel" */
#define signature_INTEL_ebx 0x756e6547
#define signature_INTEL_edx 0x49656e69
#define signature_INTEL_ecx 0x6c65746e
/* TM1: "TransmetaCPU" */
#define signature_TM1_ebx 0x6e617254
#define signature_TM1_edx 0x74656d73
#define signature_TM1_ecx 0x55504361
/* TM2: "GenuineTMx86" */
#define signature_TM2_ebx 0x756e6547
#define signature_TM2_edx 0x54656e69
#define signature_TM2_ecx 0x3638784d
/* NSC: "Geode by NSC" */
#define signature_NSC_ebx 0x646f6547
#define signature_NSC_edx 0x79622065
#define signature_NSC_ecx 0x43534e20
/* NEXGEN: "NexGenDriven" */
#define signature_NEXGEN_ebx 0x4778654e
#define signature_NEXGEN_edx 0x72446e65
#define signature_NEXGEN_ecx 0x6e657669
/* RISE: "RiseRiseRise" */
#define signature_RISE_ebx 0x65736952
#define signature_RISE_edx 0x65736952
#define signature_RISE_ecx 0x65736952
/* SIS: "SiS SiS SiS " */
#define signature_SIS_ebx 0x20536953
#define signature_SIS_edx 0x20536953
#define signature_SIS_ecx 0x20536953
/* UMC: "UMC UMC UMC " */
#define signature_UMC_ebx 0x20434d55
#define signature_UMC_edx 0x20434d55
#define signature_UMC_ecx 0x20434d55
/* VIA: "VIA VIA VIA " */
#define signature_VIA_ebx 0x20414956
#define signature_VIA_edx 0x20414956
#define signature_VIA_ecx 0x20414956
/* VORTEX: "Vortex86 SoC" */
#define signature_VORTEX_ebx 0x74726f56
#define signature_VORTEX_edx 0x36387865
#define signature_VORTEX_ecx 0x436f5320
/* Features in %ecx for leaf 1 */
#define bit_SSE3 0x00000001
#define bit_PCLMULQDQ 0x00000002
#define bit_PCLMUL bit_PCLMULQDQ /* for gcc compat */
#define bit_DTES64 0x00000004
#define bit_MONITOR 0x00000008
#define bit_DSCPL 0x00000010
#define bit_VMX 0x00000020
#define bit_SMX 0x00000040
#define bit_EIST 0x00000080
#define bit_TM2 0x00000100
#define bit_SSSE3 0x00000200
#define bit_CNXTID 0x00000400
#define bit_FMA 0x00001000
#define bit_CMPXCHG16B 0x00002000
#define bit_xTPR 0x00004000
#define bit_PDCM 0x00008000
#define bit_PCID 0x00020000
#define bit_DCA 0x00040000
#define bit_SSE41 0x00080000
#define bit_SSE4_1 bit_SSE41 /* for gcc compat */
#define bit_SSE42 0x00100000
#define bit_SSE4_2 bit_SSE42 /* for gcc compat */
#define bit_x2APIC 0x00200000
#define bit_MOVBE 0x00400000
#define bit_POPCNT 0x00800000
#define bit_TSCDeadline 0x01000000
#define bit_AESNI 0x02000000
#define bit_AES bit_AESNI /* for gcc compat */
#define bit_XSAVE 0x04000000
#define bit_OSXSAVE 0x08000000
#define bit_AVX 0x10000000
#define bit_F16C 0x20000000
#define bit_RDRND 0x40000000
/* Features in %edx for leaf 1 */
#define bit_FPU 0x00000001
#define bit_VME 0x00000002
#define bit_DE 0x00000004
#define bit_PSE 0x00000008
#define bit_TSC 0x00000010
#define bit_MSR 0x00000020
#define bit_PAE 0x00000040
#define bit_MCE 0x00000080
#define bit_CX8 0x00000100
#define bit_CMPXCHG8B bit_CX8 /* for gcc compat */
#define bit_APIC 0x00000200
#define bit_SEP 0x00000800
#define bit_MTRR 0x00001000
#define bit_PGE 0x00002000
#define bit_MCA 0x00004000
#define bit_CMOV 0x00008000
#define bit_PAT 0x00010000
#define bit_PSE36 0x00020000
#define bit_PSN 0x00040000
#define bit_CLFSH 0x00080000
#define bit_DS 0x00200000
#define bit_ACPI 0x00400000
#define bit_MMX 0x00800000
#define bit_FXSR 0x01000000
#define bit_FXSAVE bit_FXSR /* for gcc compat */
#define bit_SSE 0x02000000
#define bit_SSE2 0x04000000
#define bit_SS 0x08000000
#define bit_HTT 0x10000000
#define bit_TM 0x20000000
#define bit_PBE 0x80000000
/* Features in %ebx for leaf 7 sub-leaf 0 */
#define bit_FSGSBASE 0x00000001
#define bit_SGX 0x00000004
#define bit_BMI 0x00000008
#define bit_HLE 0x00000010
#define bit_AVX2 0x00000020
#define bit_SMEP 0x00000080
#define bit_BMI2 0x00000100
#define bit_ENH_MOVSB 0x00000200
#define bit_INVPCID 0x00000400
#define bit_RTM 0x00000800
#define bit_MPX 0x00004000
#define bit_AVX512F 0x00010000
#define bit_AVX512DQ 0x00020000
#define bit_RDSEED 0x00040000
#define bit_ADX 0x00080000
#define bit_AVX512IFMA 0x00200000
#define bit_CLFLUSHOPT 0x00800000
#define bit_CLWB 0x01000000
#define bit_AVX512PF 0x04000000
#define bit_AVX512ER 0x08000000
#define bit_AVX512CD 0x10000000
#define bit_SHA 0x20000000
#define bit_AVX512BW 0x40000000
#define bit_AVX512VL 0x80000000
/* Features in %ecx for leaf 7 sub-leaf 0 */
#define bit_PREFTCHWT1 0x00000001
#define bit_AVX512VBMI 0x00000002
#define bit_PKU 0x00000004
#define bit_OSPKE 0x00000010
#define bit_WAITPKG 0x00000020
#define bit_AVX512VBMI2 0x00000040
#define bit_SHSTK 0x00000080
#define bit_GFNI 0x00000100
#define bit_VAES 0x00000200
#define bit_VPCLMULQDQ 0x00000400
#define bit_AVX512VNNI 0x00000800
#define bit_AVX512BITALG 0x00001000
#define bit_AVX512VPOPCNTDQ 0x00004000
#define bit_RDPID 0x00400000
#define bit_CLDEMOTE 0x02000000
#define bit_MOVDIRI 0x08000000
#define bit_MOVDIR64B 0x10000000
#define bit_ENQCMD 0x20000000
/* Features in %edx for leaf 7 sub-leaf 0 */
#define bit_AVX5124VNNIW 0x00000004
#define bit_AVX5124FMAPS 0x00000008
#define bit_SERIALIZE 0x00004000
#define bit_TSXLDTRK 0x00010000
#define bit_PCONFIG 0x00040000
#define bit_IBT 0x00100000
#define bit_AMXBF16 0x00400000
#define bit_AMXTILE 0x01000000
#define bit_AMXINT8 0x02000000
/* Features in %eax for leaf 7 sub-leaf 1 */
#define bit_AVX512BF16 0x00000020
/* Features in %eax for leaf 13 sub-leaf 1 */
#define bit_XSAVEOPT 0x00000001
#define bit_XSAVEC 0x00000002
#define bit_XSAVES 0x00000008
/* Features in %eax for leaf 0x14 sub-leaf 0 */
#define bit_PTWRITE 0x00000010
/* Features in %ecx for leaf 0x80000001 */
#define bit_LAHF_LM 0x00000001
#define bit_ABM 0x00000020
#define bit_LZCNT bit_ABM /* for gcc compat */
#define bit_SSE4a 0x00000040
#define bit_PRFCHW 0x00000100
#define bit_XOP 0x00000800
#define bit_LWP 0x00008000
#define bit_FMA4 0x00010000
#define bit_TBM 0x00200000
#define bit_MWAITX 0x20000000
/* Features in %edx for leaf 0x80000001 */
#define bit_MMXEXT 0x00400000
#define bit_LM 0x20000000
#define bit_3DNOWP 0x40000000
#define bit_3DNOW 0x80000000
/* Features in %ebx for leaf 0x80000008 */
#define bit_CLZERO 0x00000001
#define bit_WBNOINVD 0x00000200
#if __i386__
#define __cpuid(__leaf, __eax, __ebx, __ecx, __edx) \
__asm("cpuid" : "=a"(__eax), "=b" (__ebx), "=c"(__ecx), "=d"(__edx) \
: "0"(__leaf))
#define __cpuid_count(__leaf, __count, __eax, __ebx, __ecx, __edx) \
__asm("cpuid" : "=a"(__eax), "=b" (__ebx), "=c"(__ecx), "=d"(__edx) \
: "0"(__leaf), "2"(__count))
#else
/* x86-64 uses %rbx as the base register, so preserve it. */
#define __cpuid(__leaf, __eax, __ebx, __ecx, __edx) \
__asm(" xchgq %%rbx,%q1\n" \
" cpuid\n" \
" xchgq %%rbx,%q1" \
: "=a"(__eax), "=r" (__ebx), "=c"(__ecx), "=d"(__edx) \
: "0"(__leaf))
#define __cpuid_count(__leaf, __count, __eax, __ebx, __ecx, __edx) \
__asm(" xchgq %%rbx,%q1\n" \
" cpuid\n" \
" xchgq %%rbx,%q1" \
: "=a"(__eax), "=r" (__ebx), "=c"(__ecx), "=d"(__edx) \
: "0"(__leaf), "2"(__count))
#endif
static __inline int __get_cpuid_max (unsigned int __leaf, unsigned int *__sig)
{
unsigned int __eax, __ebx, __ecx, __edx;
#if __i386__
int __cpuid_supported;
__asm(" pushfl\n"
" popl %%eax\n"
" movl %%eax,%%ecx\n"
" xorl $0x00200000,%%eax\n"
" pushl %%eax\n"
" popfl\n"
" pushfl\n"
" popl %%eax\n"
" movl $0,%0\n"
" cmpl %%eax,%%ecx\n"
" je 1f\n"
" movl $1,%0\n"
"1:"
: "=r" (__cpuid_supported) : : "eax", "ecx");
if (!__cpuid_supported)
return 0;
#endif
__cpuid(__leaf, __eax, __ebx, __ecx, __edx);
if (__sig)
*__sig = __ebx;
return __eax;
}
static __inline int __get_cpuid (unsigned int __leaf, unsigned int *__eax,
unsigned int *__ebx, unsigned int *__ecx,
unsigned int *__edx)
{
unsigned int __max_leaf = __get_cpuid_max(__leaf & 0x80000000, 0);
if (__max_leaf == 0 || __max_leaf < __leaf)
return 0;
__cpuid(__leaf, *__eax, *__ebx, *__ecx, *__edx);
return 1;
}
static __inline int __get_cpuid_count (unsigned int __leaf,
unsigned int __subleaf,
unsigned int *__eax, unsigned int *__ebx,
unsigned int *__ecx, unsigned int *__edx)
{
unsigned int __max_leaf = __get_cpuid_max(__leaf & 0x80000000, 0);
if (__max_leaf == 0 || __max_leaf < __leaf)
return 0;
__cpuid_count(__leaf, __subleaf, *__eax, *__ebx, *__ecx, *__edx);
return 1;
}