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3367d8e180
This patch is based on __strcmp_power9 and __strlen_power10.
Improvements from __strcmp_power9:
1. Uses new POWER10 instructions
- This code uses lxvp to decrease contention on load
by loading 32 bytes per instruction.
2. Performance implication
- This version has around 30% better performance on average.
- Performance regression is seen for a specific combination
of sizes and alignments. Some of them is observed without
changes also, while rest may be induced by the patch.
Signed-off-by: Amrita H S <amritahs@linux.vnet.ibm.com>
Reviewed-by: Paul E. Murphy <murphyp@linux.ibm.com>
26 lines
1.1 KiB
ArmAsm
26 lines
1.1 KiB
ArmAsm
/* Optimized strcmp implementation for POWER10/PPC64.
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Copyright (C) 2021-2023 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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#if defined __LITTLE_ENDIAN__ && IS_IN (libc)
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#define STRCMP __strcmp_power10
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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/le/power10/strcmp.S>
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#endif /* __LITTLE_ENDIAN__ && IS_IN (libc) */
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