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6f23d0939e
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.
42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
/* Copyright (C) 1991-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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 <string.h>
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#undef strpbrk
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#ifndef STRPBRK
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#define STRPBRK strpbrk
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#endif
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/* Find the first occurrence in S of any character in ACCEPT. */
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char *
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STRPBRK (const char *s, const char *accept)
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{
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while (*s != '\0')
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{
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const char *a = accept;
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while (*a != '\0')
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if (*a++ == *s)
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return (char *) s;
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++s;
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}
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return NULL;
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}
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libc_hidden_builtin_def (strpbrk)
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