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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.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@gnu.org>, 1996.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <wchar.h>
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#ifdef WMEMCHR
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# define __wmemchr WMEMCHR
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#endif
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wchar_t *
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__wmemchr (s, c, n)
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const wchar_t *s;
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wchar_t c;
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size_t n;
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{
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/* For performance reasons unfold the loop four times. */
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while (n >= 4)
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{
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if (s[0] == c)
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return (wchar_t *) s;
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if (s[1] == c)
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return (wchar_t *) &s[1];
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if (s[2] == c)
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return (wchar_t *) &s[2];
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if (s[3] == c)
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return (wchar_t *) &s[3];
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s += 4;
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n -= 4;
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}
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if (n > 0)
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{
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if (*s == c)
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return (wchar_t *) s;
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++s;
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--n;
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}
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if (n > 0)
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{
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if (*s == c)
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return (wchar_t *) s;
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++s;
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--n;
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}
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if (n > 0)
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if (*s == c)
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return (wchar_t *) s;
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return NULL;
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}
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libc_hidden_def (__wmemchr)
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weak_alias (__wmemchr, wmemchr)
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libc_hidden_weak (wmemchr)
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