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| author | Amrita H S <amritahs@linux.ibm.com> | 2024-05-06 09:01:29 -0500 |
|---|---|---|
| committer | Peter Bergner <bergner@linux.ibm.com> | 2024-05-06 09:01:29 -0500 |
| commit | 23f0d81608d0ca6379894ef81670cf30af7fd081 (patch) | |
| tree | 2c6ec46bf4d7bfb00c46f215a5735cb49db65e31 /sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c | |
| parent | ea73eb5f581ef5931fd67005aa0c526ba43366c9 (diff) | |
| download | glibc-23f0d81608d0ca6379894ef81670cf30af7fd081.tar.gz glibc-23f0d81608d0ca6379894ef81670cf30af7fd081.tar.xz glibc-23f0d81608d0ca6379894ef81670cf30af7fd081.zip | |
powerpc: Optimized strncmp for power10
This patch is based on __strcmp_power10.
Improvements from __strncmp_power9:
1. Uses new POWER10 instructions
- This code uses lxvp to decrease contention on load
by loading 32 bytes per instruction.
2. Performance implication
- This version has around 38% better performance on average.
- Minor performance regression is seen for few small sizes
and specific combination of alignments.
Signed-off-by: Amrita H S <amritahs@linux.ibm.com>
Reviewed-by: Peter Bergner <bergner@linux.ibm.com>
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 30fd89e109..2bb47d3527 100644 --- a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c +++ b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c @@ -164,6 +164,9 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, /* Support sysdeps/powerpc/powerpc64/multiarch/strncmp.c. */ IFUNC_IMPL (i, name, strncmp, #ifdef __LITTLE_ENDIAN__ + IFUNC_IMPL_ADD (array, i, strncmp, hwcap2 & PPC_FEATURE2_ARCH_3_1 + && hwcap & PPC_FEATURE_HAS_VSX, + __strncmp_power10) IFUNC_IMPL_ADD (array, i, strncmp, hwcap2 & PPC_FEATURE2_ARCH_3_00 && hwcap & PPC_FEATURE_HAS_ALTIVEC, __strncmp_power9) |