commit 27f8864bd41f0f1b61e8e947d9a030b1a0d23df9 Author: H.J. Lu Date: Thu Jun 18 05:34:15 2020 -0700 x86: Update F16C detection [BZ #26133] Since F16C requires AVX, set F16C usable only when AVX is usable. diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c index 2a801e1856cfe1b3..37619c93f8dbcc5d 100644 --- a/sysdeps/x86/cpu-features.c +++ b/sysdeps/x86/cpu-features.c @@ -146,6 +146,10 @@ get_common_indices (struct cpu_features *cpu_features, if (CPU_FEATURES_CPU_P (cpu_features, XOP)) cpu_features->feature[index_arch_XOP_Usable] |= bit_arch_XOP_Usable; + /* Determine if F16C is usable. */ + if (CPU_FEATURES_CPU_P (cpu_features, F16C)) + cpu_features->feature[index_arch_F16C_Usable] + |= bit_arch_F16C_Usable; } /* Check if OPMASK state, upper 256-bit of ZMM0-ZMM15 and diff --git a/sysdeps/x86/cpu-features.h b/sysdeps/x86/cpu-features.h index 7abfa046c4b8f6ac..f18f7520fcb7714a 100644 --- a/sysdeps/x86/cpu-features.h +++ b/sysdeps/x86/cpu-features.h @@ -142,6 +142,7 @@ extern const struct cpu_features *__get_cpu_features (void) #define bit_arch_VPCLMULQDQ_Usable (1u << 20) #define bit_arch_XOP_Usable (1u << 21) #define bit_arch_XSAVEC_Usable (1u << 22) +#define bit_arch_F16C_Usable (1u << 23) #define index_arch_AVX_Usable FEATURE_INDEX_1 #define index_arch_AVX2_Usable FEATURE_INDEX_1 @@ -166,6 +167,7 @@ extern const struct cpu_features *__get_cpu_features (void) #define index_arch_VPCLMULQDQ_Usable FEATURE_INDEX_1 #define index_arch_XOP_Usable FEATURE_INDEX_1 #define index_arch_XSAVEC_Usable FEATURE_INDEX_1 +#define index_arch_F16C_Usable FEATURE_INDEX_1 /* Unused. Compiler will optimize them out. */ #define bit_arch_SSE3_Usable (1u << 0) @@ -179,7 +181,6 @@ extern const struct cpu_features *__get_cpu_features (void) #define bit_arch_AES_Usable (1u << 0) #define bit_arch_XSAVE_Usable (1u << 0) #define bit_arch_OSXSAVE_Usable (1u << 0) -#define bit_arch_F16C_Usable (1u << 0) #define bit_arch_RDRAND_Usable (1u << 0) #define bit_arch_FPU_Usable (1u << 0) #define bit_arch_TSC_Usable (1u << 0) @@ -236,7 +237,6 @@ extern const struct cpu_features *__get_cpu_features (void) #define index_arch_AES_Usable FEATURE_INDEX_1 #define index_arch_XSAVE_Usable FEATURE_INDEX_1 #define index_arch_OSXSAVE_Usable FEATURE_INDEX_1 -#define index_arch_F16C_Usable FEATURE_INDEX_1 #define index_arch_RDRAND_Usable FEATURE_INDEX_1 #define index_arch_FPU_Usable FEATURE_INDEX_1 #define index_arch_TSC_Usable FEATURE_INDEX_1 @@ -296,7 +296,7 @@ extern const struct cpu_features *__get_cpu_features (void) #define need_arch_feature_XSAVE 0 #define need_arch_feature_OSXSAVE 0 #define need_arch_feature_AVX 1 -#define need_arch_feature_F16C 0 +#define need_arch_feature_F16C 1 #define need_arch_feature_RDRAND 0 /* EDX. */