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aa70d05632
Add stpcpy support to the POWER9 strcpy. This is up to 40% faster on
small strings and up to 90% faster on long relatively unaligned strings,
compared to the POWER8 version. A few examples:
__stpcpy_power9 __stpcpy_power8
Length 20, alignments in bytes 4/ 4: 2.58246 4.8788
Length 1024, alignments in bytes 1/ 6: 24.8186 47.8528
50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/* Multiple versions of stpcpy. PowerPC64 version.
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Copyright (C) 2013-2020 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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#if defined SHARED && IS_IN (libc)
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# define __NO_STRING_INLINES
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# define NO_MEMPCPY_STPCPY_REDIRECT
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# include <string.h>
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# include <shlib-compat.h>
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# include "init-arch.h"
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extern __typeof (__stpcpy) __stpcpy_ppc attribute_hidden;
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extern __typeof (__stpcpy) __stpcpy_power7 attribute_hidden;
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extern __typeof (__stpcpy) __stpcpy_power8 attribute_hidden;
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# ifdef __LITTLE_ENDIAN__
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extern __typeof (__stpcpy) __stpcpy_power9 attribute_hidden;
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# endif
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libc_ifunc_hidden (__stpcpy, __stpcpy,
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# ifdef __LITTLE_ENDIAN__
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(hwcap2 & PPC_FEATURE2_ARCH_3_00)
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? __stpcpy_power9 :
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# endif
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(hwcap2 & PPC_FEATURE2_ARCH_2_07)
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? __stpcpy_power8
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: (hwcap & PPC_FEATURE_HAS_VSX)
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? __stpcpy_power7
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: __stpcpy_ppc);
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weak_alias (__stpcpy, stpcpy)
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libc_hidden_def (__stpcpy)
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libc_hidden_def (stpcpy)
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#else
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# include <string/stpcpy.c>
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#endif
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