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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%.
38 lines
1.3 KiB
C
38 lines
1.3 KiB
C
/* Common definition for strncmp ifunc selection.
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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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<https://www.gnu.org/licenses/>. */
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#include <ldsodefs.h>
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#include <ifunc-init.h>
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#if !defined __loongarch_soft_float
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extern __typeof (REDIRECT_NAME) OPTIMIZE (lsx) attribute_hidden;
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#endif
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extern __typeof (REDIRECT_NAME) OPTIMIZE (aligned) attribute_hidden;
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static inline void *
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IFUNC_SELECTOR (void)
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{
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#if !defined __loongarch_soft_float
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if (SUPPORT_LSX)
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return OPTIMIZE (lsx);
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else
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#endif
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return OPTIMIZE (aligned);
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}
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