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| author | Anton Blanchard <anton@ozlabs.org> | 2020-05-14 21:49:16 +1000 |
|---|---|---|
| committer | Paul E. Murphy <murphyp@linux.vnet.ibm.com> | 2020-05-18 17:08:54 -0500 |
| commit | 765de945efc5d5602999b2999fe8abdf04881370 (patch) | |
| tree | 8c252731dcf3fc61ae700a5dba120c1eafc8f41f /sysdeps/powerpc/powerpc64/multiarch/rawmemchr.c | |
| parent | 9e38f455a6c602be86b7b5a8d6523cbdcd7ec051 (diff) | |
| download | glibc-765de945efc5d5602999b2999fe8abdf04881370.tar.gz glibc-765de945efc5d5602999b2999fe8abdf04881370.tar.xz glibc-765de945efc5d5602999b2999fe8abdf04881370.zip | |
powerpc: Optimized rawmemchr for POWER9
This version uses vector instructions and is up to 60% faster on medium
matches and up to 90% faster on long matches, compared to the POWER7
version. A few examples:
__rawmemchr_power9 __rawmemchr_power7
Length 32, alignment 0: 2.27566 3.77765
Length 64, alignment 2: 2.46231 3.51064
Length 1024, alignment 0: 17.3059 32.6678
Diffstat (limited to 'sysdeps/powerpc/powerpc64/multiarch/rawmemchr.c')
| -rw-r--r-- | sysdeps/powerpc/powerpc64/multiarch/rawmemchr.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/sysdeps/powerpc/powerpc64/multiarch/rawmemchr.c b/sysdeps/powerpc/powerpc64/multiarch/rawmemchr.c index 847157e5f0..c49c0c51ff 100644 --- a/sysdeps/powerpc/powerpc64/multiarch/rawmemchr.c +++ b/sysdeps/powerpc/powerpc64/multiarch/rawmemchr.c @@ -24,13 +24,21 @@ extern __typeof (__rawmemchr) __rawmemchr_ppc attribute_hidden; extern __typeof (__rawmemchr) __rawmemchr_power7 attribute_hidden; +# ifdef __LITTLE_ENDIAN__ +extern __typeof (__rawmemchr) __rawmemchr_power9 attribute_hidden; +# endif + # undef __rawmemchr /* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle ifunc symbol properly. */ libc_ifunc_redirected (__redirect___rawmemchr, __rawmemchr, - (hwcap & PPC_FEATURE_HAS_VSX) - ? __rawmemchr_power7 +# ifdef __LITTLE_ENDIAN__ + (hwcap2 & PPC_FEATURE2_ARCH_3_00) + ? __rawmemchr_power9 : +# endif + (hwcap & PPC_FEATURE_HAS_VSX) + ? __rawmemchr_power7 : __rawmemchr_ppc); weak_alias (__rawmemchr, rawmemchr) |