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x86: Update F16C detection [BZ #26133]

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Since F16C requires AVX, set F16C usable only when AVX is usable.
This commit is contained in:
H.J. Lu 2020-06-18 05:34:15 -07:00
parent 75870237ff
commit 27f8864bd4
2 changed files with 7 additions and 3 deletions
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4
sysdeps/x86/cpu-features.c
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@ -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

6
sysdeps/x86/cpu-features.h
View File

@ -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. */