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SSSE3 strcpy/stpcpy for x86-64

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This patch adds SSSE3 strcpy/stpcpy. I got up to 4X speed up on Core 2
and Core i7.  I disabled it on Atom since SSSE3 version is slower for
shorter (<64byte) data.
This commit is contained in:
H.J. Lu
2009-07-02 03:39:03 -07:00
committed by Ulrich Drepper
parent 6cbbaa50aa
commit ab6a873fe0
10 changed files with 1982 additions and 12 deletions
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15
string/stpncpy.c
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@ -28,17 +28,19 @@
# include <sys/types.h>
#endif
#ifndef weak_alias
# define __stpncpy stpncpy
#ifndef STPNCPY
# ifdef weak_alias
# define STPNCPY __stpncpy
weak_alias (__stpncpy, stpncpy)
# else
# define STPNCPY stpncpy
# endif
#endif
/* Copy no more than N characters of SRC to DEST, returning the address of
the terminating '\0' in DEST, if any, or else DEST + N. */
char *
__stpncpy (dest, src, n)
char *dest;
const char *src;
size_t n;
STPNCPY (char *dest, const char *src, size_t n)
{
char c;
char *s = dest;
@ -96,5 +98,4 @@ __stpncpy (dest, src, n)
}
#ifdef weak_alias
libc_hidden_def (__stpncpy)
weak_alias (__stpncpy, stpncpy)
#endif