From b42f8cad52ebfbfd43ebf6e42e606b489ffbd466 Mon Sep 17 00:00:00 2001 From: Rajalakshmi Srinivasaraghavan Date: Wed, 24 Jun 2015 02:08:21 -0400 Subject: powerpc: strstr optimization This patch optimizes strstr function for power >= 7 systems. Performance gain is obtained using aligned memory access and usage of cmpb instruction for quicker comparison. The average improvement of this optimization is ~40%. Tested on ppc64 and ppc64le. 2015-07-16 Rajalakshmi Srinivasaraghavan * sysdeps/powerpc/powerpc64/multiarch/Makefile: Add strstr(). * sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c: Likewise. * sysdeps/powerpc/powerpc64/power7/strstr.S: New File. * sysdeps/powerpc/powerpc64/multiarch/strstr-power7.S: New File. * sysdeps/powerpc/powerpc64/multiarch/strstr-ppc64.c: New File. * sysdeps/powerpc/powerpc64/multiarch/strstr.c: New File. --- ChangeLog | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'ChangeLog') diff --git a/ChangeLog b/ChangeLog index 1630c1d582..809fe1807a 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,13 @@ +2015-07-16 Rajalakshmi Srinivasaraghavan + + * sysdeps/powerpc/powerpc64/multiarch/Makefile: Add strstr-power7 + and strstr-ppc64.. + * sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c: Likewise. + * sysdeps/powerpc/powerpc64/power7/strstr.S: New File. + * sysdeps/powerpc/powerpc64/multiarch/strstr-power7.S: New File. + * sysdeps/powerpc/powerpc64/multiarch/strstr-ppc64.c: New File. + * sysdeps/powerpc/powerpc64/multiarch/strstr.c: New File. + 2015-07-16 Mike Frysinger * sysdeps/hppa/Versions (GLIBC_PRIVATE): Delete _dl_unmap. -- cgit v1.2.3