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| author | Sunil K Pandey <skpgkp2@gmail.com> | 2022-07-26 13:54:56 -0700 |
|---|---|---|
| committer | Sunil K Pandey <skpgkp2@gmail.com> | 2022-10-25 22:39:35 -0700 |
| commit | 59e501f204fa196d6571b523459ba528bbef7783 (patch) | |
| tree | a28a658c0ff90fcb6295f9629275ab2d33905211 /sysdeps/x86_64/multiarch/ifunc-impl-list.c | |
| parent | 7a6ca82f8007ddbd43e2b8fce806ba7101ee47f5 (diff) | |
| download | glibc-59e501f204fa196d6571b523459ba528bbef7783.tar.gz glibc-59e501f204fa196d6571b523459ba528bbef7783.tar.xz glibc-59e501f204fa196d6571b523459ba528bbef7783.zip | |
x86_64: Implement evex512 version of strchrnul, strchr and wcschr
This patch implements following evex512 version of string functions. evex512 version takes up to 30% less cycle as compared to evex, depending on length and alignment. - strchrnul function using 512 bit vectors. - strchr function using 512 bit vectors. - wcschr function using 512 bit vectors. Code size data: strchrnul-evex.o 599 byte strchrnul-evex512.o 569 byte (-5%) strchr-evex.o 639 byte strchr-evex512.o 595 byte (-7%) wcschr-evex.o 644 byte wcschr-evex512.o 607 byte (-6%) Placeholder function, not used by any processor at the moment. Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
Diffstat (limited to 'sysdeps/x86_64/multiarch/ifunc-impl-list.c')
| -rw-r--r-- | sysdeps/x86_64/multiarch/ifunc-impl-list.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/sysdeps/x86_64/multiarch/ifunc-impl-list.c b/sysdeps/x86_64/multiarch/ifunc-impl-list.c index 529c0b0ef0..c3d75a09f4 100644 --- a/sysdeps/x86_64/multiarch/ifunc-impl-list.c +++ b/sysdeps/x86_64/multiarch/ifunc-impl-list.c @@ -544,6 +544,10 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, && CPU_FEATURE_USABLE (AVX512BW) && CPU_FEATURE_USABLE (BMI2)), __strchr_evex) + X86_IFUNC_IMPL_ADD_V4 (array, i, strchr, + (CPU_FEATURE_USABLE (AVX512VL) + && CPU_FEATURE_USABLE (AVX512BW)), + __strchr_evex512) X86_IFUNC_IMPL_ADD_V3 (array, i, strchr, (CPU_FEATURE_USABLE (AVX2) && CPU_FEATURE_USABLE (BMI2)), @@ -569,6 +573,10 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, && CPU_FEATURE_USABLE (AVX512BW) && CPU_FEATURE_USABLE (BMI2)), __strchrnul_evex) + X86_IFUNC_IMPL_ADD_V4 (array, i, strchrnul, + (CPU_FEATURE_USABLE (AVX512VL) + && CPU_FEATURE_USABLE (AVX512BW)), + __strchrnul_evex512) X86_IFUNC_IMPL_ADD_V3 (array, i, strchrnul, (CPU_FEATURE_USABLE (AVX2) && CPU_FEATURE_USABLE (BMI2)), @@ -793,6 +801,10 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, && CPU_FEATURE_USABLE (AVX512BW) && CPU_FEATURE_USABLE (BMI2)), __wcschr_evex) + X86_IFUNC_IMPL_ADD_V4 (array, i, wcschr, + (CPU_FEATURE_USABLE (AVX512VL) + && CPU_FEATURE_USABLE (AVX512BW)), + __wcschr_evex512) X86_IFUNC_IMPL_ADD_V3 (array, i, wcschr, (CPU_FEATURE_USABLE (AVX2) && CPU_FEATURE_USABLE (BMI2)), |