/* This file is part of the GNU C Library. Copyright (C) 2008-2017 Free Software Foundation, Inc. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see . */ #ifndef cpu_features_h #define cpu_features_h #define bit_arch_Fast_Rep_String (1 << 0) #define bit_arch_Fast_Copy_Backward (1 << 1) #define bit_arch_Slow_BSF (1 << 2) #define bit_arch_Fast_Unaligned_Load (1 << 4) #define bit_arch_Prefer_PMINUB_for_stringop (1 << 5) #define bit_arch_AVX_Usable (1 << 6) #define bit_arch_FMA_Usable (1 << 7) #define bit_arch_FMA4_Usable (1 << 8) #define bit_arch_Slow_SSE4_2 (1 << 9) #define bit_arch_AVX2_Usable (1 << 10) #define bit_arch_AVX_Fast_Unaligned_Load (1 << 11) #define bit_arch_AVX512F_Usable (1 << 12) #define bit_arch_AVX512DQ_Usable (1 << 13) #define bit_arch_I586 (1 << 14) #define bit_arch_I686 (1 << 15) #define bit_arch_Prefer_MAP_32BIT_EXEC (1 << 16) #define bit_arch_Prefer_No_VZEROUPPER (1 << 17) #define bit_arch_Fast_Unaligned_Copy (1 << 18) #define bit_arch_Prefer_ERMS (1 << 19) #define bit_arch_Prefer_No_AVX512 (1 << 20) #define bit_arch_MathVec_Prefer_No_AVX512 (1 << 21) #define bit_arch_XSAVEC_Usable (1 << 22) /* CPUID Feature flags. */ /* COMMON_CPUID_INDEX_1. */ #define bit_cpu_CX8 (1 << 8) #define bit_cpu_CMOV (1 << 15) #define bit_cpu_SSE (1 << 25) #define bit_cpu_SSE2 (1 << 26) #define bit_cpu_SSSE3 (1 << 9) #define bit_cpu_SSE4_1 (1 << 19) #define bit_cpu_SSE4_2 (1 << 20) #define bit_cpu_OSXSAVE (1 << 27) #define bit_cpu_AVX (1 << 28) #define bit_cpu_POPCOUNT (1 << 23) #define bit_cpu_FMA (1 << 12) #define bit_cpu_FMA4 (1 << 16) #define bit_cpu_HTT (1 << 28) #define bit_cpu_LZCNT (1 << 5) #define bit_cpu_MOVBE (1 << 22) #define bit_cpu_POPCNT (1 << 23) /* COMMON_CPUID_INDEX_7. */ #define bit_cpu_BMI1 (1 << 3) #define bit_cpu_BMI2 (1 << 8) #define bit_cpu_ERMS (1 << 9) #define bit_cpu_RTM (1 << 11) #define bit_cpu_AVX2 (1 << 5) #define bit_cpu_AVX512F (1 << 16) #define bit_cpu_AVX512DQ (1 << 17) #define bit_cpu_AVX512PF (1 << 26) #define bit_cpu_AVX512ER (1 << 27) #define bit_cpu_AVX512CD (1 << 28) #define bit_cpu_AVX512BW (1 << 30) #define bit_cpu_AVX512VL (1u << 31) #define bit_cpu_IBT (1u << 20) #define bit_cpu_SHSTK (1u << 7) /* XCR0 Feature flags. */ #define bit_XMM_state (1 << 1) #define bit_YMM_state (1 << 2) #define bit_Opmask_state (1 << 5) #define bit_ZMM0_15_state (1 << 6) #define bit_ZMM16_31_state (1 << 7) /* The integer bit array index for the first set of internal feature bits. */ #define FEATURE_INDEX_1 0 /* The current maximum size of the feature integer bit array. */ #define FEATURE_INDEX_MAX 1 /* Offset for fxsave/xsave area used by _dl_runtime_resolve. Also need space to preserve RCX, RDX, RSI, RDI, R8, R9 and RAX. It must be aligned to 16 bytes for fxsave and 64 bytes for xsave. */ #define STATE_SAVE_OFFSET (8 * 7 + 8) /* Save SSE, AVX, AVX512, mask and bound registers. */ #define STATE_SAVE_MASK \ ((1 << 1) | (1 << 2) | (1 << 3) | (1 << 5) | (1 << 6) | (1 << 7)) #ifdef __ASSEMBLER__ # include #else /* __ASSEMBLER__ */ enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, /* for AMD */ /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpu_features { enum cpu_features_kind { arch_kind_unknown = 0, arch_kind_intel, arch_kind_amd, arch_kind_other } kind; int max_cpuid; struct cpuid_registers { unsigned int eax; unsigned int ebx; unsigned int ecx; unsigned int edx; } cpuid[COMMON_CPUID_INDEX_MAX]; unsigned int family; unsigned int model; /* The state size for XSAVEC or XSAVE. The type must be unsigned long int so that we use sub xsave_state_size_offset(%rip) %RSP_LP in _dl_runtime_resolve. */ unsigned long int xsave_state_size; /* The full state size for XSAVE when XSAVEC is disabled by GLIBC_TUNABLES=glibc.tune.hwcaps=-XSAVEC_Usable */ unsigned int xsave_state_full_size; unsigned int feature[FEATURE_INDEX_MAX]; /* Data cache size for use in memory and string routines, typically L1 size. */ unsigned long int data_cache_size; /* Shared cache size for use in memory and string routines, typically L2 or L3 size. */ unsigned long int shared_cache_size; /* Threshold to use non temporal store. */ unsigned long int non_temporal_threshold; }; /* Used from outside of glibc to get access to the CPU features structure. */ extern const struct cpu_features *__get_cpu_features (void) __attribute__ ((const)); # if defined (_LIBC) && !IS_IN (nonlib) /* Unused for x86. */ # define INIT_ARCH() # define __get_cpu_features() (&GLRO(dl_x86_cpu_features)) # endif /* Only used directly in cpu-features.c. */ # define CPU_FEATURES_CPU_P(ptr, name) \ ((ptr->cpuid[index_cpu_##name].reg_##name & (bit_cpu_##name)) != 0) # define CPU_FEATURES_ARCH_P(ptr, name) \ ((ptr->feature[index_arch_##name] & (bit_arch_##name)) != 0) /* HAS_* evaluates to true if we may use the feature at runtime. */ # define HAS_CPU_FEATURE(name) \ CPU_FEATURES_CPU_P (__get_cpu_features (), name) # define HAS_ARCH_FEATURE(name) \ CPU_FEATURES_ARCH_P (__get_cpu_features (), name) # define index_cpu_CX8 COMMON_CPUID_INDEX_1 # define index_cpu_CMOV COMMON_CPUID_INDEX_1 # define index_cpu_SSE COMMON_CPUID_INDEX_1 # define index_cpu_SSE2 COMMON_CPUID_INDEX_1 # define index_cpu_SSSE3 COMMON_CPUID_INDEX_1 # define index_cpu_SSE4_1 COMMON_CPUID_INDEX_1 # define index_cpu_SSE4_2 COMMON_CPUID_INDEX_1 # define index_cpu_AVX COMMON_CPUID_INDEX_1 # define index_cpu_AVX2 COMMON_CPUID_INDEX_7 # define index_cpu_AVX512F COMMON_CPUID_INDEX_7 # define index_cpu_AVX512DQ COMMON_CPUID_INDEX_7 # define index_cpu_AVX512PF COMMON_CPUID_INDEX_7 # define index_cpu_AVX512ER COMMON_CPUID_INDEX_7 # define index_cpu_AVX512CD COMMON_CPUID_INDEX_7 # define index_cpu_AVX512BW COMMON_CPUID_INDEX_7 # define index_cpu_AVX512VL COMMON_CPUID_INDEX_7 # define index_cpu_ERMS COMMON_CPUID_INDEX_7 # define index_cpu_RTM COMMON_CPUID_INDEX_7 # define index_cpu_FMA COMMON_CPUID_INDEX_1 # define index_cpu_FMA4 COMMON_CPUID_INDEX_80000001 # define index_cpu_POPCOUNT COMMON_CPUID_INDEX_1 # define index_cpu_OSXSAVE COMMON_CPUID_INDEX_1 # define index_cpu_HTT COMMON_CPUID_INDEX_1 # define index_cpu_BMI1 COMMON_CPUID_INDEX_7 # define index_cpu_BMI2 COMMON_CPUID_INDEX_7 # define index_cpu_LZCNT COMMON_CPUID_INDEX_1 # define index_cpu_MOVBE COMMON_CPUID_INDEX_1 # define index_cpu_POPCNT COMMON_CPUID_INDEX_1 # define index_cpu_IBT COMMON_CPUID_INDEX_7 # define index_cpu_SHSTK COMMON_CPUID_INDEX_7 # define reg_CX8 edx # define reg_CMOV edx # define reg_SSE edx # define reg_SSE2 edx # define reg_SSSE3 ecx # define reg_SSE4_1 ecx # define reg_SSE4_2 ecx # define reg_AVX ecx # define reg_AVX2 ebx # define reg_AVX512F ebx # define reg_AVX512DQ ebx # define reg_AVX512PF ebx # define reg_AVX512ER ebx # define reg_AVX512CD ebx # define reg_AVX512BW ebx # define reg_AVX512VL ebx # define reg_ERMS ebx # define reg_RTM ebx # define reg_FMA ecx # define reg_FMA4 ecx # define reg_POPCOUNT ecx # define reg_OSXSAVE ecx # define reg_HTT edx # define reg_BMI1 ebx # define reg_BMI2 ebx # define reg_LZCNT ecx # define reg_MOVBE ecx # define reg_POPCNT ecx # define reg_IBT edx # define reg_SHSTK ecx # define index_arch_Fast_Rep_String FEATURE_INDEX_1 # define index_arch_Fast_Copy_Backward FEATURE_INDEX_1 # define index_arch_Slow_BSF FEATURE_INDEX_1 # define index_arch_Fast_Unaligned_Load FEATURE_INDEX_1 # define index_arch_Prefer_PMINUB_for_stringop FEATURE_INDEX_1 # define index_arch_AVX_Usable FEATURE_INDEX_1 # define index_arch_FMA_Usable FEATURE_INDEX_1 # define index_arch_FMA4_Usable FEATURE_INDEX_1 # define index_arch_Slow_SSE4_2 FEATURE_INDEX_1 # define index_arch_AVX2_Usable FEATURE_INDEX_1 # define index_arch_AVX_Fast_Unaligned_Load FEATURE_INDEX_1 # define index_arch_AVX512F_Usable FEATURE_INDEX_1 # define index_arch_AVX512DQ_Usable FEATURE_INDEX_1 # define index_arch_I586 FEATURE_INDEX_1 # define index_arch_I686 FEATURE_INDEX_1 # define index_arch_Prefer_MAP_32BIT_EXEC FEATURE_INDEX_1 # define index_arch_Prefer_No_VZEROUPPER FEATURE_INDEX_1 # define index_arch_Fast_Unaligned_Copy FEATURE_INDEX_1 # define index_arch_Prefer_ERMS FEATURE_INDEX_1 # define index_arch_Prefer_No_AVX512 FEATURE_INDEX_1 # define index_arch_MathVec_Prefer_No_AVX512 FEATURE_INDEX_1 # define index_arch_XSAVEC_Usable FEATURE_INDEX_1 #endif /* !__ASSEMBLER__ */ #ifdef __x86_64__ # define HAS_CPUID 1 #elif defined __i586__ || defined __pentium__ # define HAS_CPUID 1 # define HAS_I586 1 # define HAS_I686 HAS_ARCH_FEATURE (I686) #elif (defined __i686__ || defined __pentiumpro__ \ || defined __pentium4__ || defined __nocona__ \ || defined __atom__ || defined __core2__ \ || defined __corei7__ || defined __corei7_avx__ \ || defined __core_avx2__ || defined __nehalem__ \ || defined __sandybridge__ || defined __haswell__ \ || defined __knl__ || defined __bonnell__ \ || defined __silvermont__ \ || defined __k6__ || defined __k8__ \ || defined __athlon__ || defined __amdfam10__ \ || defined __bdver1__ || defined __bdver2__ \ || defined __bdver3__ || defined __bdver4__ \ || defined __btver1__ || defined __btver2__) # define HAS_CPUID 1 # define HAS_I586 1 # define HAS_I686 1 #else # define HAS_CPUID 0 # define HAS_I586 HAS_ARCH_FEATURE (I586) # define HAS_I686 HAS_ARCH_FEATURE (I686) #endif #endif /* cpu_features_h */