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| author | H.J. Lu <hjl.tools@gmail.com> | 2018-05-21 16:54:46 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2018-05-21 16:54:59 -0700 |
| commit | e28e9b1ec40d5b545d980b0a36cbe41f3d1dbf6a (patch) | |
| tree | 7fe0767441c477a36fe4d7aeb2caf17e7c45c18a /sysdeps/x86_64/multiarch | |
| parent | 1af30adcd59fae929371d3a56b239861b1088a6e (diff) | |
| download | glibc-e28e9b1ec40d5b545d980b0a36cbe41f3d1dbf6a.tar.gz | |
x86-64: Check Prefer_FSRM in ifunc-memmove.h
Although the REP MOVSB implementations of memmove, memcpy and mempcpy
aren't used by the current processors, this patch adds Prefer_FSRM
check in ifunc-memmove.h so that they can be used in the future.
* sysdeps/x86/cpu-features.h (bit_arch_Prefer_FSRM): New.
(index_arch_Prefer_FSRM): Likewise.
* sysdeps/x86/cpu-tunables.c (TUNABLE_CALLBACK (set_hwcaps)):
Also check Prefer_FSRM.
* sysdeps/x86_64/multiarch/ifunc-memmove.h (IFUNC_SELECTOR):
Also return OPTIMIZE (erms) for Prefer_FSRM.
Diffstat (limited to 'sysdeps/x86_64/multiarch')
| -rw-r--r-- | sysdeps/x86_64/multiarch/ifunc-memmove.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sysdeps/x86_64/multiarch/ifunc-memmove.h b/sysdeps/x86_64/multiarch/ifunc-memmove.h index a2ffba0531..5b1eb1c92c 100644 --- a/sysdeps/x86_64/multiarch/ifunc-memmove.h +++ b/sysdeps/x86_64/multiarch/ifunc-memmove.h @@ -41,7 +41,8 @@ IFUNC_SELECTOR (void) { const struct cpu_features* cpu_features = __get_cpu_features (); - if (CPU_FEATURES_ARCH_P (cpu_features, Prefer_ERMS)) + if (CPU_FEATURES_ARCH_P (cpu_features, Prefer_ERMS) + || CPU_FEATURES_ARCH_P (cpu_features, Prefer_FSRM)) return OPTIMIZE (erms); if (CPU_FEATURES_ARCH_P (cpu_features, AVX512F_Usable) |