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c7debbdfac
This patch optimizes strrchr() for ppc64. It uses aligned memory access along with cmpb instruction and CPU prefetch to avoid cache misses for speed improvement.
40 lines
1.3 KiB
ArmAsm
40 lines
1.3 KiB
ArmAsm
/* Optimized strrchr implementation for POWER7.
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Copyright (C) 2014 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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#include <sysdep.h>
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#undef ENTRY
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#define ENTRY(name) \
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.section ".text"; \
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ENTRY_2(__strrchr_power7) \
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.align ALIGNARG(2); \
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BODY_LABEL(__strrchr_power7): \
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cfi_startproc; \
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LOCALENTRY(__strrchr_power7)
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#undef END
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#define END(name) \
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cfi_endproc; \
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TRACEBACK(__strrchr_power7) \
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END_2(__strrchr_power7)
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#undef libc_hidden_builtin_def
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#define libc_hidden_builtin_def(name)
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#include <sysdeps/powerpc/powerpc64/power7/strrchr.S>
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