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| author | H.J. Lu <hjl.tools@gmail.com> | 2021-04-19 10:45:07 -0700 |
|---|---|---|
| committer | Sunil K Pandey <skpgkp2@gmail.com> | 2022-09-28 18:05:48 -0700 |
| commit | f9e29095fcc11f79a3afcb4b5dd3ce070e3d4084 (patch) | |
| tree | 928d473010962c7cd64d4ae47ee7b69bc9dfcddf | |
| parent | 51b72ac04bc23dd5e82a5e9fbdbc86820dd26d98 (diff) | |
| download | glibc-f9e29095fcc11f79a3afcb4b5dd3ce070e3d4084.tar.gz glibc-f9e29095fcc11f79a3afcb4b5dd3ce070e3d4084.tar.xz glibc-f9e29095fcc11f79a3afcb4b5dd3ce070e3d4084.zip | |
x86-64: Require BMI2 for strchr-avx2.S [BZ #29611]
Since strchr-avx2.S updated by
commit 1f745ecc2109890886b161d4791e1406fdfc29b8
Author: noah <goldstein.w.n@gmail.com>
Date: Wed Feb 3 00:38:59 2021 -0500
x86-64: Refactor and improve performance of strchr-avx2.S
uses sarx:
c4 e2 72 f7 c0 sarx %ecx,%eax,%eax
for strchr-avx2 family functions, require BMI2 in ifunc-impl-list.c and
ifunc-avx2.h.
This fixes BZ #29611.
(cherry picked from commit 83c5b368226c34a2f0a5287df40fc290b2b34359)
| -rw-r--r-- | sysdeps/x86_64/multiarch/ifunc-avx2.h | 4 | ||||
| -rw-r--r-- | sysdeps/x86_64/multiarch/ifunc-impl-list.c | 12 |
2 files changed, 11 insertions, 5 deletions
diff --git a/sysdeps/x86_64/multiarch/ifunc-avx2.h b/sysdeps/x86_64/multiarch/ifunc-avx2.h index f450c786f0..0d9d837488 100644 --- a/sysdeps/x86_64/multiarch/ifunc-avx2.h +++ b/sysdeps/x86_64/multiarch/ifunc-avx2.h @@ -30,11 +30,11 @@ IFUNC_SELECTOR (void) const struct cpu_features* cpu_features = __get_cpu_features (); if (CPU_FEATURE_USABLE_P (cpu_features, AVX2) + && CPU_FEATURE_USABLE_P (cpu_features, BMI2) && 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)) + && CPU_FEATURE_USABLE_P (cpu_features, AVX512BW)) return OPTIMIZE (evex); if (CPU_FEATURE_USABLE_P (cpu_features, RTM)) diff --git a/sysdeps/x86_64/multiarch/ifunc-impl-list.c b/sysdeps/x86_64/multiarch/ifunc-impl-list.c index 920e64241e..d4bbf61030 100644 --- a/sysdeps/x86_64/multiarch/ifunc-impl-list.c +++ b/sysdeps/x86_64/multiarch/ifunc-impl-list.c @@ -400,10 +400,12 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, /* Support sysdeps/x86_64/multiarch/strchr.c. */ IFUNC_IMPL (i, name, strchr, IFUNC_IMPL_ADD (array, i, strchr, - CPU_FEATURE_USABLE (AVX2), + (CPU_FEATURE_USABLE (AVX2) + && CPU_FEATURE_USABLE (BMI2)), __strchr_avx2) IFUNC_IMPL_ADD (array, i, strchr, (CPU_FEATURE_USABLE (AVX2) + && CPU_FEATURE_USABLE (BMI2) && CPU_FEATURE_USABLE (RTM)), __strchr_avx2_rtm) IFUNC_IMPL_ADD (array, i, strchr, @@ -417,10 +419,12 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, /* Support sysdeps/x86_64/multiarch/strchrnul.c. */ IFUNC_IMPL (i, name, strchrnul, IFUNC_IMPL_ADD (array, i, strchrnul, - CPU_FEATURE_USABLE (AVX2), + (CPU_FEATURE_USABLE (AVX2) + && CPU_FEATURE_USABLE (BMI2)), __strchrnul_avx2) IFUNC_IMPL_ADD (array, i, strchrnul, (CPU_FEATURE_USABLE (AVX2) + && CPU_FEATURE_USABLE (BMI2) && CPU_FEATURE_USABLE (RTM)), __strchrnul_avx2_rtm) IFUNC_IMPL_ADD (array, i, strchrnul, @@ -574,10 +578,12 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, /* Support sysdeps/x86_64/multiarch/wcschr.c. */ IFUNC_IMPL (i, name, wcschr, IFUNC_IMPL_ADD (array, i, wcschr, - CPU_FEATURE_USABLE (AVX2), + (CPU_FEATURE_USABLE (AVX2) + && CPU_FEATURE_USABLE (BMI2)), __wcschr_avx2) IFUNC_IMPL_ADD (array, i, wcschr, (CPU_FEATURE_USABLE (AVX2) + && CPU_FEATURE_USABLE (BMI2) && CPU_FEATURE_USABLE (RTM)), __wcschr_avx2_rtm) IFUNC_IMPL_ADD (array, i, wcschr, |