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3d9f171bfb
memset with zero as the value to set is by far the majority value (99%+ for Python3 and GCC). bzero can be slightly more optimized for this case by using a zero-idiom xor for broadcasting the set value to a register (vector or GPR). Co-developed-by: Noah Goldstein <goldstein.w.n@gmail.com>
42 lines
1.3 KiB
ArmAsm
42 lines
1.3 KiB
ArmAsm
/* memset with SSE2.
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All versions must be listed in ifunc-impl-list.c.
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Copyright (C) 2014-2022 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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#include <sysdep.h>
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#include <shlib-compat.h>
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#if IS_IN (libc)
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# define MEMSET_SYMBOL(p,s) p##_sse2_##s
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# define BZERO_SYMBOL(p,s) MEMSET_SYMBOL (p, s)
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# define WMEMSET_SYMBOL(p,s) p##_sse2_##s
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# ifdef SHARED
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# undef libc_hidden_builtin_def
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# define libc_hidden_builtin_def(name)
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# endif
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# undef weak_alias
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# define weak_alias(original, alias) \
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.weak bzero; bzero = __bzero
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# undef strong_alias
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# define strong_alias(ignored1, ignored2)
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#endif
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#include <sysdeps/x86_64/memset.S>
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