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PowerPC: strrchr optimization for POWER7/PPC64

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This patch optimizes strrchr() for ppc64. It uses aligned memory
access along with cmpb instruction and CPU prefetch to avoid
cache misses for speed improvement.
This commit is contained in:
Rajalakshmi Srinivasaraghavan
2014-03-03 08:06:41 -06:00
committed by Adhemerval Zanella
parent 235eed8644
commit c7debbdfac
8 changed files with 389 additions and 2 deletions
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8
sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
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@@ -238,5 +238,13 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
IFUNC_IMPL_ADD (array, i, wcscpy, 1,
__wcscpy_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/strrchr.c. */
IFUNC_IMPL (i, name, strrchr,
IFUNC_IMPL_ADD (array, i, strrchr,
hwcap & PPC_FEATURE_HAS_VSX,
__strrchr_power7)
IFUNC_IMPL_ADD (array, i, strrchr, 1,
__strrchr_ppc))
return i;
}