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| author | Noah Goldstein <goldstein.w.n@gmail.com> | 2021-06-23 01:19:34 -0400 |
|---|---|---|
| committer | Noah Goldstein <goldstein.w.n@gmail.com> | 2021-06-23 14:12:36 -0400 |
| commit | 6f573a27b6c8b4236445810a44660612323f5a73 (patch) | |
| tree | 3159bf94549e7e2e0458c05e9b992321b7c67026 /sysdeps/x86_64/multiarch/wcsnlen.c | |
| parent | a0db678071c60b6c47c468d231dd0b3694ba7a98 (diff) | |
| download | glibc-6f573a27b6c8b4236445810a44660612323f5a73.tar.gz glibc-6f573a27b6c8b4236445810a44660612323f5a73.tar.xz glibc-6f573a27b6c8b4236445810a44660612323f5a73.zip | |
x86-64: Add wcslen optimize for sse4.1
No bug. This comment adds the ifunc / build infrastructure necessary for wcslen to prefer the sse4.1 implementation in strlen-vec.S. test-wcslen.c is passing. Signed-off-by: Noah Goldstein <goldstein.w.n@gmail.com> Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
Diffstat (limited to 'sysdeps/x86_64/multiarch/wcsnlen.c')
| -rw-r--r-- | sysdeps/x86_64/multiarch/wcsnlen.c | 34 |
1 files changed, 1 insertions, 33 deletions
diff --git a/sysdeps/x86_64/multiarch/wcsnlen.c b/sysdeps/x86_64/multiarch/wcsnlen.c index 4983f1b222..2963fbe059 100644 --- a/sysdeps/x86_64/multiarch/wcsnlen.c +++ b/sysdeps/x86_64/multiarch/wcsnlen.c @@ -24,39 +24,7 @@ # undef __wcsnlen # define SYMBOL_NAME wcsnlen -# include <init-arch.h> - -extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden; -extern __typeof (REDIRECT_NAME) OPTIMIZE (sse4_1) 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; - -static inline void * -IFUNC_SELECTOR (void) -{ - 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 (CPU_FEATURE_USABLE_P (cpu_features, AVX512VL) - && CPU_FEATURE_USABLE_P (cpu_features, AVX512BW) - && 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)) - return OPTIMIZE (avx2); - } - - if (CPU_FEATURE_USABLE_P (cpu_features, SSE4_1)) - return OPTIMIZE (sse4_1); - - return OPTIMIZE (sse2); -} +# include "ifunc-wcslen.h" libc_ifunc_redirected (__redirect_wcsnlen, __wcsnlen, IFUNC_SELECTOR ()); weak_alias (__wcsnlen, wcsnlen); |