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8bedcb5f03
This patch adds an optimized POWER8 strcmp using unaligned accesses. The algorithm first check the initial 16 bytes, then align the first function source and uses unaligned loads on second argument only. Aditional checks for page boundaries are done for unaligned cases
35 lines
1.3 KiB
C
35 lines
1.3 KiB
C
/* Multiple versions of strcmp. PowerPC64 version.
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Copyright (C) 2014-2015 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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#if defined SHARED && IS_IN (libc)
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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 (strcmp) __strcmp_ppc attribute_hidden;
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extern __typeof (strcmp) __strcmp_power7 attribute_hidden;
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extern __typeof (strcmp) __strcmp_power8 attribute_hidden;
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libc_ifunc (strcmp,
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(hwcap2 & PPC_FEATURE2_ARCH_2_07)
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? __strcmp_power8 :
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(hwcap & PPC_FEATURE_HAS_VSX)
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? __strcmp_power7
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: __strcmp_ppc);
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#endif
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