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e1fe91180e
This patch provides optimized versions of strncat and wcsncat with the z13 vector instructions. ChangeLog: * sysdeps/s390/multiarch/strncat-c.c: New File. * sysdeps/s390/multiarch/strncat-vx.S: Likewise. * sysdeps/s390/multiarch/strncat.c: Likewise. * sysdeps/s390/multiarch/wcsncat-c.c: Likewise. * sysdeps/s390/multiarch/wcsncat-vx.S: Likewise. * sysdeps/s390/multiarch/wcsncat.c: Likewise. * sysdeps/s390/multiarch/Makefile (sysdep_routines): Add strncat and wcsncat functions. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Add ifunc test for strncat, wcsncat. * wcsmbs/wcsncat.c (WCSNCAT): Define and use macro. * string/test-strncat.c: Add wcsncat support. * wcsmbs/test-wcsncat.c: New File. * wcsmbs/Makefile (strop-tests): Add wcsncat. * benchtests/bench-strncat.c: Add wcsncat support. * benchtests/bench-wcsncat.c: New File. * benchtests/Makefile (wcsmbs-bench): Add wcsncat.
83 lines
1.8 KiB
C
83 lines
1.8 KiB
C
/* Copyright (C) 1995-2015 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.ai.mit.edu>, 1995.
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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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#ifndef WCSNCAT
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# define WCSNCAT wcsncat
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#endif
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/* Append no more than N wide-character of SRC onto DEST. */
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wchar_t *
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WCSNCAT (dest, src, n)
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wchar_t *dest;
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const wchar_t *src;
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size_t n;
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{
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wchar_t c;
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wchar_t * const s = dest;
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/* Find the end of DEST. */
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do
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c = *dest++;
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while (c != L'\0');
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/* Make DEST point before next character, so we can increment
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it while memory is read (wins on pipelined cpus). */
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dest -= 2;
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if (n >= 4)
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{
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size_t n4 = n >> 2;
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do
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{
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c = *src++;
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*++dest = c;
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if (c == L'\0')
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return s;
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c = *src++;
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*++dest = c;
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if (c == L'\0')
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return s;
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c = *src++;
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*++dest = c;
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if (c == L'\0')
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return s;
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c = *src++;
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*++dest = c;
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if (c == L'\0')
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return s;
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} while (--n4 > 0);
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n &= 3;
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}
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while (n > 0)
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{
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c = *src++;
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*++dest = c;
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if (c == L'\0')
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return s;
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n--;
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}
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if (c != L'\0')
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*++dest = L'\0';
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return s;
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}
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