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| author | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2014-07-15 12:19:09 -0400 |
|---|---|---|
| committer | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2014-09-10 07:39:46 -0400 |
| commit | 71ae86478edc7b21872464f43fb29ff650c1681a (patch) | |
| tree | a75679fa464a1d19543020ef0c4f4f982d099d99 /sysdeps/powerpc/powerpc64/multiarch/Makefile | |
| parent | 3b473fecdf4c52989cd915b649bb6d26c042d048 (diff) | |
| download | glibc-71ae86478edc7b21872464f43fb29ff650c1681a.tar.gz glibc-71ae86478edc7b21872464f43fb29ff650c1681a.tar.xz glibc-71ae86478edc7b21872464f43fb29ff650c1681a.zip | |
PowerPC: memset optimization for POWER8/PPC64
This patch adds an optimized memset implementation for POWER8. For sizes from 0 to 255 bytes, a word/doubleword algorithm similar to POWER7 optimized one is used. For size higher than 255 two strategies are used: 1. If the constant is different than 0, the memory is written with altivec vector instruction; 2. If constant is 0, dbcz instructions are used. The loop is unrolled to clear 512 byte at time. Using vector instructions increases throughput considerable, with a double performance for sizes larger than 1024. The dcbz loops unrolls also shows performance improvement, by doubling throughput for sizes larger than 8192 bytes.
Diffstat (limited to 'sysdeps/powerpc/powerpc64/multiarch/Makefile')
| -rw-r--r-- | sysdeps/powerpc/powerpc64/multiarch/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sysdeps/powerpc/powerpc64/multiarch/Makefile b/sysdeps/powerpc/powerpc64/multiarch/Makefile index 0de3804c0c..abc9d2e973 100644 --- a/sysdeps/powerpc/powerpc64/multiarch/Makefile +++ b/sysdeps/powerpc/powerpc64/multiarch/Makefile @@ -2,7 +2,7 @@ ifeq ($(subdir),string) sysdep_routines += memcpy-power7 memcpy-a2 memcpy-power6 memcpy-cell \ memcpy-power4 memcpy-ppc64 memcmp-power7 memcmp-power4 \ memcmp-ppc64 memset-power7 memset-power6 memset-power4 \ - memset-ppc64 \ + memset-ppc64 memset-power8 \ mempcpy-power7 mempcpy-ppc64 memchr-power7 memchr-ppc64 \ memrchr-power7 memrchr-ppc64 rawmemchr-power7 \ rawmemchr-ppc64 strlen-power7 strlen-ppc64 strnlen-power7 \ |