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PATCH: 32bit memcmp/strcmp/strncmp optimized for SSSE3/SSS4.2

From: "H.J. Lu" <hongjiu dot lu at intel dot com>
To: GNU C Library <libc-alpha at sourceware dot org>
Date: Fri, 12 Feb 2010 16:01:56 -0800
Subject: PATCH: 32bit memcmp/strcmp/strncmp optimized for SSSE3/SSS4.2
Reply-to: "H.J. Lu" <hjl dot tools at gmail dot com>

Hi,

Here is a patch to provide 32bit memcmp/strcmp/strncmp optimized for
SSSE3/SSS4.2.  It can improve memcmp by up to 3X, strcmp by up
to 7X, strncmp by up to 5X.


H.J.
---
2010-02-12  H.J. Lu  <hongjiu.lu@intel.com>

	* sysdeps/i386/i686/multiarch/Makefile (sysdep_routines): Add
	strncmp-c strncmp-ssse3 strncmp-sse4 memcmp-c memcmp-ssse3
	memcmp-sse4.

	* sysdeps/i386/i686/multiarch/memcmp-sse4.S: New.
	* sysdeps/i386/i686/multiarch/memcmp-ssse3.S: Likewise.
	* sysdeps/i386/i686/multiarch/memcmp.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcmp-sse4.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcmp-ssse3.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcmp.S: Likewise.
	* sysdeps/i386/i686/multiarch/strncmp-c.c: Likewise.
	* sysdeps/i386/i686/multiarch/strncmp-sse4.S: Likewise.
	* sysdeps/i386/i686/multiarch/strncmp-ssse3.S: Likewise.
	* sysdeps/i386/i686/multiarch/strncmp.S: Likewise.

Attachment: libc-strcmp-sse4-1.patch.bz2
Description: BZip2 compressed data

Follow-Ups:
- Re: PATCH: 32bit memcmp/strcmp/strncmp optimized for SSSE3/SSS4.2
  - From: Ulrich Drepper

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