diff options
Diffstat (limited to 'sysdeps/x86_64/multiarch/strcmp.c')
| -rw-r--r-- | sysdeps/x86_64/multiarch/strcmp.c | 37 |
1 files changed, 25 insertions, 12 deletions
diff --git a/sysdeps/x86_64/multiarch/strcmp.c b/sysdeps/x86_64/multiarch/strcmp.c index 9c1677724c..fdd5afe3af 100644 --- a/sysdeps/x86_64/multiarch/strcmp.c +++ b/sysdeps/x86_64/multiarch/strcmp.c @@ -26,37 +26,50 @@ # define SYMBOL_NAME strcmp # include <init-arch.h> -extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden; -extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2_unaligned) attribute_hidden; -extern __typeof (REDIRECT_NAME) OPTIMIZE (sse42) attribute_hidden; +extern __typeof (REDIRECT_NAME) OPTIMIZE (evex) attribute_hidden; + extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2) attribute_hidden; extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2_rtm) attribute_hidden; -extern __typeof (REDIRECT_NAME) OPTIMIZE (evex) attribute_hidden; + +extern __typeof (REDIRECT_NAME) OPTIMIZE (sse42) attribute_hidden; + +extern __typeof (REDIRECT_NAME) + OPTIMIZE (sse2_unaligned) attribute_hidden; +extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden; + + static inline void * IFUNC_SELECTOR (void) { - const struct cpu_features* cpu_features = __get_cpu_features (); + const struct cpu_features *cpu_features = __get_cpu_features (); - if (CPU_FEATURE_USABLE_P (cpu_features, AVX2) - && CPU_FEATURES_ARCH_P (cpu_features, AVX_Fast_Unaligned_Load)) + if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX2) + && X86_ISA_CPU_FEATURES_ARCH_P (cpu_features, + AVX_Fast_Unaligned_Load, )) { - if (CPU_FEATURE_USABLE_P (cpu_features, AVX512VL) - && CPU_FEATURE_USABLE_P (cpu_features, AVX512BW) - && CPU_FEATURE_USABLE_P (cpu_features, BMI2)) + if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX512VL) + && X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX512BW) + && X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, BMI2)) return OPTIMIZE (evex); if (CPU_FEATURE_USABLE_P (cpu_features, RTM)) return OPTIMIZE (avx2_rtm); - if (!CPU_FEATURES_ARCH_P (cpu_features, Prefer_No_VZEROUPPER)) + if (X86_ISA_CPU_FEATURES_ARCH_P (cpu_features, + Prefer_No_VZEROUPPER, !)) return OPTIMIZE (avx2); } - if (CPU_FEATURE_USABLE_P (cpu_features, SSE4_2) + if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, SSE4_2) + /* Keep this as runtime check. Some ISA level >= 2 CPUs such as + Tremont, Silvermont, and more check this. */ && !CPU_FEATURES_ARCH_P (cpu_features, Slow_SSE4_2)) return OPTIMIZE (sse42); + /* Keep this as runtime check. The standard SSE2 version has + meaningful optimizations around keeping all loads aligned in the + main loop which can benefit some ISA level >= 2 CPUs. */ if (CPU_FEATURES_ARCH_P (cpu_features, Fast_Unaligned_Load)) return OPTIMIZE (sse2_unaligned); |