65 lines
2.2 KiB
C
65 lines
2.2 KiB
C
/* Multiple versions of memmove.
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All versions must be listed in ifunc-impl-list.c.
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Copyright (C) 2010-2015 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 IS_IN (libc)
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# define MEMMOVE __memmove_sse2
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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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__hidden_ver1 (__memmove_sse2, __GI_memmove, __memmove_sse2);
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# endif
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/* Redefine memmove so that the compiler won't complain about the type
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mismatch with the IFUNC selector in strong_alias, below. */
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# undef memmove
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# define memmove __redirect_memmove
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# include <string.h>
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# undef memmove
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extern __typeof (__redirect_memmove) __memmove_sse2 attribute_hidden;
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extern __typeof (__redirect_memmove) __memmove_ssse3 attribute_hidden;
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extern __typeof (__redirect_memmove) __memmove_ssse3_back attribute_hidden;
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extern __typeof (__redirect_memmove) __memmove_avx_unaligned attribute_hidden;
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#endif
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#include "string/memmove.c"
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#if IS_IN (libc)
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# include <shlib-compat.h>
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# include "init-arch.h"
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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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extern __typeof (__redirect_memmove) __libc_memmove;
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libc_ifunc (__libc_memmove,
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HAS_ARCH_FEATURE (AVX_Fast_Unaligned_Load)
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? __memmove_avx_unaligned
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: (HAS_CPU_FEATURE (SSSE3)
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? (HAS_ARCH_FEATURE (Fast_Copy_Backward)
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? __memmove_ssse3_back : __memmove_ssse3)
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: __memmove_sse2));
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strong_alias (__libc_memmove, memmove)
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# if SHLIB_COMPAT (libc, GLIBC_2_2_5, GLIBC_2_14)
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compat_symbol (libc, memmove, memcpy, GLIBC_2_2_5);
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# endif
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#endif
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