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| author | Wainer dos Santos Moschetta <wainersm@linux.vnet.ibm.com> | 2017-04-05 10:24:24 -0300 |
|---|---|---|
| committer | Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com> | 2017-04-05 10:26:58 -0300 |
| commit | 18b6e2c86ce03c9be8ee0a53840fe5d533de22b3 (patch) | |
| tree | 1e58ed4cc0d2886d01223510f11ccf2889a719dd /sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c | |
| parent | b2b1ea8b777c2f1362d41ee34089104f535e9903 (diff) | |
| download | glibc-18b6e2c86ce03c9be8ee0a53840fe5d533de22b3.tar.gz glibc-18b6e2c86ce03c9be8ee0a53840fe5d533de22b3.tar.xz glibc-18b6e2c86ce03c9be8ee0a53840fe5d533de22b3.zip | |
powerpc64: Add POWER8 strnlen
Added strnlen POWER8 otimized for long strings. It delivers same performance as POWER7 implementation for short strings. This takes advantage of reasonably performing unaligned loads and bit permutes to check the first 1-16 bytes until quadword aligned, then checks in 64 bytes strides until unsafe, then 16 bytes, truncating the count if need be. Likewise, the POWER7 code is recycled for less than 32 bytes strings. Tested on ppc64 and ppc64le. * sysdeps/powerpc/powerpc64/multiarch/Makefile (sysdep_routines): Add strnlen-power8. * sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c (strnlen): Add __strnlen_power8 to list of strnlen functions. * sysdeps/powerpc/powerpc64/multiarch/strnlen-power8.S: New file. * sysdeps/powerpc/powerpc64/multiarch/strnlen.c (__strnlen): Add __strnlen_power8 to ifunc list. * sysdeps/powerpc/powerpc64/power8/strnlen.S: New file.
Diffstat (limited to 'sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c')
| -rw-r--r-- | sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c index 209aec5340..30a013320b 100644 --- a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c +++ b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c @@ -204,6 +204,9 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, /* Support sysdeps/powerpc/powerpc64/multiarch/strnlen.c. */ IFUNC_IMPL (i, name, strnlen, + IFUNC_IMPL_ADD (array, i, strnlen, + hwcap2 & PPC_FEATURE2_ARCH_2_07, + __strnlen_power8) IFUNC_IMPL_ADD (array, i, strnlen, hwcap & PPC_FEATURE_HAS_VSX, __strnlen_power7) IFUNC_IMPL_ADD (array, i, strnlen, 1, |