Work around old buggy program which cannot cope with memcpy semantics.
[glibc.git] / sysdeps / x86_64 / multiarch / memmove.c
1 /* Multiple versions of memmove.
2 Copyright (C) 2010, 2011
3 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 02111-1307 USA. */
20
21 #include <string.h>
22
23 #ifndef NOT_IN_libc
24 #include <shlib-compat.h>
25 #include "init-arch.h"
26
27 #define MEMMOVE __memmove_sse2
28 #ifdef SHARED
29 # undef libc_hidden_builtin_def
30 # define libc_hidden_builtin_def(name) \
31 __hidden_ver1 (__memmove_sse2, __GI_memmove, __memmove_sse2);
32 #endif
33 #endif
34
35 extern __typeof (memmove) __memmove_sse2 attribute_hidden;
36 extern __typeof (memmove) __memmove_ssse3 attribute_hidden;
37 extern __typeof (memmove) __memmove_ssse3_back attribute_hidden;
38
39 #include "string/memmove.c"
40
41 #ifndef NOT_IN_libc
42 libc_ifunc (memmove,
43 HAS_SSSE3
44 ? (HAS_FAST_COPY_BACKWARD
45 ? __memmove_ssse3_back : __memmove_ssse3)
46 : __memmove_sse2);
47
48 #if SHLIB_COMPAT (libc, GLIBC_2_2_5, GLIBC_2_14)
49 compat_symbol (libc, memmove, memcpy, GLIBC_2_2_5);
50 #endif
51 #endif