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PowerPC: optimized strpbrk for POWER7

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This patch add an optimized strpbrk for POWER7 by using a different
algorithm than default implementation: it constructs a table based on
the 'accept' argument and use this table to check for any occurance on
the input string. The idea is similar as x86_64 uses.
For PowerPC some tunings were added, such as unroll loops and memory
clear using VSX instructions.
This commit is contained in:
Adhemerval Zanella
2014-03-20 15:28:07 -05:00
parent 8c92dfff41
commit 6f23d0939e
8 changed files with 282 additions and 11 deletions
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16
string/strpbrk.c
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@ -15,21 +15,17 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#if defined _LIBC || defined HAVE_CONFIG_H
# include <string.h>
#endif
#include <string.h>
#undef strpbrk
#ifndef STRPBRK
#define STRPBRK strpbrk
#endif
/* Find the first occurrence in S of any character in ACCEPT. */
char *
strpbrk (s, accept)
const char *s;
const char *accept;
STRPBRK (const char *s, const char *accept)
{
while (*s != '\0')
{