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92fdb11ae7
The default, and power7 implementation just adds word aligned access when inputs have the same aligment. The unaligned case is still done by byte operations. This is already covered by the generic implementation, which also add the unaligned input optimization. Checked on powerpc64-linux-gnu built without multi-arch for powerpc64, power7, power8, and power9 (build for le). Reviewed-by: Rajalakshmi Srinivasaraghavan <rajis@linux.ibm.com>
47 lines
1.7 KiB
C
47 lines
1.7 KiB
C
/* Multiple versions of strncmp.
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Copyright (C) 2013-2023 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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/* Define multiple versions only for definition in libc. */
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#if defined SHARED && IS_IN (libc)
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# define strncmp __redirect_strncmp
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/* Omit the strncmp inline definitions because it would redefine strncmp. */
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# define __NO_STRING_INLINES
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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 (strncmp) __strncmp_ppc attribute_hidden;
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extern __typeof (strncmp) __strncmp_power8 attribute_hidden;
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# ifdef __LITTLE_ENDIAN__
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extern __typeof (strncmp) __strncmp_power9 attribute_hidden;
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# endif
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# undef strncmp
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/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
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ifunc symbol properly. */
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libc_ifunc_redirected (__redirect_strncmp, strncmp,
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# ifdef __LITTLE_ENDIAN__
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(hwcap2 & PPC_FEATURE2_ARCH_3_00
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&& hwcap & PPC_FEATURE_HAS_ALTIVEC)
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? __strncmp_power9 :
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# endif
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(hwcap2 & PPC_FEATURE2_ARCH_2_07)
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? __strncmp_power8
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: __strncmp_ppc);
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#endif
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