summary refs log tree commit diff
path: root/sysdeps/powerpc/powerpc64/multiarch/Makefile
diff options
context:
space:
mode:
authorAdhemerval Zanella <azanella@linux.vnet.ibm.com>2014-12-23 05:59:44 -0600
committerAdhemerval Zanella <azanella@linux.vnet.ibm.com>2015-01-13 11:28:30 -0500
commit96d6fd6c4060d739abb1822e7ad633af749532b2 (patch)
tree3958c551f6b4e375b62cf08e3e30fd472a94acf7 /sysdeps/powerpc/powerpc64/multiarch/Makefile
parent0f9e585480edcdf1e30dc3d79e24b84aeee516fa (diff)
downloadglibc-96d6fd6c4060d739abb1822e7ad633af749532b2.tar.gz
glibc-96d6fd6c4060d739abb1822e7ad633af749532b2.tar.xz
glibc-96d6fd6c4060d739abb1822e7ad633af749532b2.zip
powerpc: Optimized st{r,p}cpy for POWER8/PPC64
This patch adds an optimized POWER8 strcpy using unaligned accesses.
For strings up to 16 bytes the implementation first calculate the
string size, like strlen, and issues a memcpy.  For larger strings,
source is first aligned to 16 bytes and then tested over a loop that
reads 16 bytes am combine the cmpb results for speedup.  Special case is
added for page cross reads.

It shows 30%-60% improvement over the optimized POWER7 one that uses
only aligned accesses.
Diffstat (limited to 'sysdeps/powerpc/powerpc64/multiarch/Makefile')
-rw-r--r--sysdeps/powerpc/powerpc64/multiarch/Makefile3
1 files changed, 2 insertions, 1 deletions
diff --git a/sysdeps/powerpc/powerpc64/multiarch/Makefile b/sysdeps/powerpc/powerpc64/multiarch/Makefile
index 39e441b9a0..f170551b44 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc64/multiarch/Makefile
@@ -13,7 +13,8 @@ sysdep_routines += memcpy-power7 memcpy-a2 memcpy-power6 memcpy-cell \
 		   wcschr-power6 wcschr-ppc64 wcsrchr-power7 wcsrchr-power6 \
 		   wcsrchr-ppc64 wcscpy-power7 wcscpy-power6 wcscpy-ppc64 \
 		   wordcopy-power7 wordcopy-power6 wordcopy-ppc64 \
-		   strcpy-power7 strcpy-ppc64 stpcpy-power7 stpcpy-ppc64 \
+		   strcpy-power8 strcpy-power7 strcpy-ppc64 stpcpy-power8 \
+		   stpcpy-power7 stpcpy-ppc64 \
 		   strrchr-power7 strrchr-ppc64 strncat-power7 strncat-ppc64 \
 		   strncpy-power7 strncpy-ppc64 \
 		   stpncpy-power7 stpncpy-ppc64 strcmp-power7 strcmp-ppc64 \