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| author | Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com> | 2015-06-24 02:08:21 -0400 |
|---|---|---|
| committer | Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com> | 2015-07-16 13:43:51 -0300 |
| commit | b42f8cad52ebfbfd43ebf6e42e606b489ffbd466 (patch) | |
| tree | ec8f4655557211a79429140e55b12d100a2745d7 /login | |
| parent | 6b96d6de8ccd1c04f172a43d3785960e0a76be3f (diff) | |
| download | glibc-b42f8cad52ebfbfd43ebf6e42e606b489ffbd466.tar.gz glibc-b42f8cad52ebfbfd43ebf6e42e606b489ffbd466.tar.xz glibc-b42f8cad52ebfbfd43ebf6e42e606b489ffbd466.zip | |
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 <raji@linux.vnet.ibm.com> * 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.
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