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SSE4.2 strstr/strcasestr for x86-64.

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This patch implements SSE4.2 strstr/strcasestr, using Knuth-Morris-Pratt
string searching algorithm.
This commit is contained in:
H.J. Lu
2009-07-20 21:06:50 -07:00
committed by Ulrich Drepper
parent 63fbc91bec
commit 2b7a8664fa
8 changed files with 551 additions and 5 deletions
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9
string/strstr.c
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@ -1,5 +1,6 @@
/* Return the offset of one string within another.
Copyright (C) 1994,1996,1997,2000,2001,2003,2008 Free Software Foundation, Inc.
Copyright (C) 1994,1996,1997,2000,2001,2003,2008,2009
Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -40,11 +41,15 @@
#undef strstr
#ifndef STRSTR
#define STRSTR strstr
#endif
/* Return the first occurrence of NEEDLE in HAYSTACK. Return HAYSTACK
if NEEDLE is empty, otherwise NULL if NEEDLE is not found in
HAYSTACK. */
char *
strstr (const char *haystack_start, const char *needle_start)
STRSTR (const char *haystack_start, const char *needle_start)
{
const char *haystack = haystack_start;
const char *needle = needle_start;