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| author | H.J. Lu <hjl.tools@gmail.com> | 2016-03-22 07:46:56 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2016-03-22 07:47:20 -0700 |
| commit | f781a9e96138d8839663af5e88649ab1fbed74f8 (patch) | |
| tree | fdb1a9b321a4cae52901cb88e52bff1f1a348a1a /sysdeps/x86/cpu-features.h | |
| parent | b87e41378beca3c98ec3464d64835e66cc788497 (diff) | |
| download | glibc-f781a9e96138d8839663af5e88649ab1fbed74f8.tar.gz glibc-f781a9e96138d8839663af5e88649ab1fbed74f8.tar.xz glibc-f781a9e96138d8839663af5e88649ab1fbed74f8.zip | |
Set index_arch_AVX_Fast_Unaligned_Load only for Intel processors
Since only Intel processors with AVX2 have fast unaligned load, we should set index_arch_AVX_Fast_Unaligned_Load only for Intel processors. Move AVX, AVX2, AVX512, FMA and FMA4 detection into get_common_indeces and call get_common_indeces for other processors. Add CPU_FEATURES_CPU_P and CPU_FEATURES_ARCH_P to aoid loading GLRO(dl_x86_cpu_features) in cpu-features.c. [BZ #19583] * sysdeps/x86/cpu-features.c (get_common_indeces): Remove inline. Check family before setting family, model and extended_model. Set AVX, AVX2, AVX512, FMA and FMA4 usable bits here. (init_cpu_features): Replace HAS_CPU_FEATURE and HAS_ARCH_FEATURE with CPU_FEATURES_CPU_P and CPU_FEATURES_ARCH_P. Set index_arch_AVX_Fast_Unaligned_Load for Intel processors with usable AVX2. Call get_common_indeces for other processors with family == NULL. * sysdeps/x86/cpu-features.h (CPU_FEATURES_CPU_P): New macro. (CPU_FEATURES_ARCH_P): Likewise. (HAS_CPU_FEATURE): Use CPU_FEATURES_CPU_P. (HAS_ARCH_FEATURE): Use CPU_FEATURES_ARCH_P.
Diffstat (limited to 'sysdeps/x86/cpu-features.h')
| -rw-r--r-- | sysdeps/x86/cpu-features.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/sysdeps/x86/cpu-features.h b/sysdeps/x86/cpu-features.h index 0624a92b2f..e06eb7e41b 100644 --- a/sysdeps/x86/cpu-features.h +++ b/sysdeps/x86/cpu-features.h @@ -204,11 +204,17 @@ extern const struct cpu_features *__get_cpu_features (void) # 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) \ - ((__get_cpu_features ()->cpuid[index_cpu_##name].reg_##name & (bit_cpu_##name)) != 0) + CPU_FEATURES_CPU_P (__get_cpu_features (), name) # define HAS_ARCH_FEATURE(name) \ - ((__get_cpu_features ()->feature[index_arch_##name] & (bit_arch_##name)) != 0) + CPU_FEATURES_ARCH_P (__get_cpu_features (), name) # define index_cpu_CX8 COMMON_CPUID_INDEX_1 # define index_cpu_CMOV COMMON_CPUID_INDEX_1 |