| /* This file is part of the GNU C Library. |
| Copyright (C) 2008-2018 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 |
| <http://www.gnu.org/licenses/>. */ |
| |
| #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 <cpu-features-offsets.h> |
| #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 */ |
