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ddbb74f5c2
Based on the glibc microbenchmark, only a few short inputs with this strncmp-aligned and strncmp-lsx implementation experience performance degradation, overall, strncmp-aligned could reduce the runtime 0%-10% for aligned comparision, 10%-25% for unaligend comparision, strncmp-lsx could reduce the runtime about 0%-60%.
35 lines
1.3 KiB
C
35 lines
1.3 KiB
C
/* Multiple versions of strncmp.
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All versions must be listed in ifunc-impl-list.c.
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Copyright (C) 2023 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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/* Define multiple versions only for the definition in libc. */
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#if IS_IN (libc)
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# define strncmp __redirect_strncmp
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# include <string.h>
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# undef strncmp
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# define SYMBOL_NAME strncmp
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# include "ifunc-strncmp.h"
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libc_ifunc_redirected (__redirect_strncmp, strncmp, IFUNC_SELECTOR ());
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# ifdef SHARED
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__hidden_ver1 (strncmp, __GI_strncmp, __redirect_strncmp)
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__attribute__ ((visibility ("hidden"))) __attribute_copy__ (strncmp);
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# endif
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#endif
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