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authorRajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com>2015-06-24 02:08:21 -0400
committerTulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>2015-07-16 13:43:51 -0300
commitb42f8cad52ebfbfd43ebf6e42e606b489ffbd466 (patch)
treeec8f4655557211a79429140e55b12d100a2745d7 /stdio-common
parent6b96d6de8ccd1c04f172a43d3785960e0a76be3f (diff)
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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.
Diffstat (limited to 'stdio-common')
0 files changed, 0 insertions, 0 deletions