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https://sourceware.org/git/glibc.git
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64b8b6516b
Implemented:
wcscat-evex (+ 905 bytes)
wcscpy-evex (+ 674 bytes)
wcpcpy-evex (+ 709 bytes)
wcsncpy-evex (+1358 bytes)
wcpncpy-evex (+1467 bytes)
wcsncat-evex (+1213 bytes)
Performance Changes:
Times are from N = 10 runs of the benchmark suite and are reported
as geometric mean of all ratios of New Implementation / Best Old
Implementation. Best Old Implementation was determined with the
highest ISA implementation.
wcscat-evex -> 0.991
wcscpy-evex -> 0.587
wcpcpy-evex -> 0.695
wcsncpy-evex -> 0.719
wcpncpy-evex -> 0.694
wcsncat-evex -> 0.979
Code Size Changes:
This change increase the size of libc.so by ~6.3kb bytes. For
reference the patch optimizing the normal strcpy family functions
decreases libc.so by ~5.7kb.
Full check passes on x86-64 and build succeeds for all ISA levels w/
and w/o multiarch.
38 lines
1.3 KiB
C
38 lines
1.3 KiB
C
/* Multiple versions of wcpcpy.
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All versions must be listed in ifunc-impl-list.c.
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Copyright (C) 2022 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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/* Define multiple versions only for the definition in libc. */
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#if IS_IN (libc)
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# define __wcpcpy __redirect_wcpcpy
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# include <wchar.h>
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# undef __wcpcpy
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# define SYMBOL_NAME wcpcpy
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# include <init-arch.h>
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# include "ifunc-wcs.h"
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libc_ifunc_redirected (__redirect_wcpcpy, __wcpcpy, IFUNC_SELECTOR ());
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weak_alias (__wcpcpy, wcpcpy)
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# ifdef SHARED
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__hidden_ver1 (__wcpcpy, __GI___wcpcpy, __redirect_wcpcpy)
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__attribute__((visibility ("hidden"))) __attribute_copy__ (wcpcpy);
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# endif
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#endif
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