mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-21 01:12:26 +08:00
88eefd344b
This patch provides optimized versions of memchr, rawmemchr and wmemchr with the z13 vector instructions. ChangeLog: * sysdeps/s390/multiarch/memchr-vx.S: New File. * sysdeps/s390/multiarch/memchr.c: Likewise. * sysdeps/s390/multiarch/rawmemchr-c.c: Likewise. * sysdeps/s390/multiarch/rawmemchr-vx.S: Likewise. * sysdeps/s390/multiarch/rawmemchr.c: Likewise. * sysdeps/s390/multiarch/wmemchr-c.c: Likewise. * sysdeps/s390/multiarch/wmemchr-vx.S: Likewise. * sysdeps/s390/multiarch/wmemchr.c: Likewise. * sysdeps/s390/s390-32/multiarch/memchr.c: Likewise. * sysdeps/s390/s390-64/multiarch/memchr.c: Likewise. * sysdeps/s390/multiarch/Makefile (sysdep_routines): Add memchr, wmemchr and rawmemchr functions. * sysdeps/s390/multiarch/ifunc-impl-list-common.c (__libc_ifunc_impl_list_common): Add ifunc test for memchr, rawmemchr and wmemchr. * wcsmbs/wmemchr.c: Use WMEMCHR if defined. * string/test-memchr.c: Add wmemchr support. * wcsmbs/test-wmemchr.c: New File. * wcsmbs/Makefile (strop-tests): Add wmemchr. * benchtests/bench-memchr.c: Add wmemchr support. * benchtests/bench-wmemchr.c: New File. * benchtests/Makefile (wcsmbs-bench): wmemchr.
69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
/* Copyright (C) 1996-2015 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@gnu.org>, 1996.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <wchar.h>
|
|
|
|
#ifdef WMEMCHR
|
|
# define __wmemchr WMEMCHR
|
|
#endif
|
|
|
|
wchar_t *
|
|
__wmemchr (s, c, n)
|
|
const wchar_t *s;
|
|
wchar_t c;
|
|
size_t n;
|
|
{
|
|
/* For performance reasons unfold the loop four times. */
|
|
while (n >= 4)
|
|
{
|
|
if (s[0] == c)
|
|
return (wchar_t *) s;
|
|
if (s[1] == c)
|
|
return (wchar_t *) &s[1];
|
|
if (s[2] == c)
|
|
return (wchar_t *) &s[2];
|
|
if (s[3] == c)
|
|
return (wchar_t *) &s[3];
|
|
s += 4;
|
|
n -= 4;
|
|
}
|
|
|
|
if (n > 0)
|
|
{
|
|
if (*s == c)
|
|
return (wchar_t *) s;
|
|
++s;
|
|
--n;
|
|
}
|
|
if (n > 0)
|
|
{
|
|
if (*s == c)
|
|
return (wchar_t *) s;
|
|
++s;
|
|
--n;
|
|
}
|
|
if (n > 0)
|
|
if (*s == c)
|
|
return (wchar_t *) s;
|
|
|
|
return NULL;
|
|
}
|
|
libc_hidden_def (__wmemchr)
|
|
weak_alias (__wmemchr, wmemchr)
|
|
libc_hidden_weak (wmemchr)
|