1/* Multiple versions of memmove.
2 All versions must be listed in ifunc-impl-list.c.
3 Copyright (C) 2010-2016 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, see
18 <http://www.gnu.org/licenses/>. */
19
20#if IS_IN (libc)
21# define MEMMOVE __memmove_sse2
22# ifdef SHARED
23# undef libc_hidden_builtin_def
24# define libc_hidden_builtin_def(name) \
25 __hidden_ver1 (__memmove_sse2, __GI_memmove, __memmove_sse2);
26# endif
27
28/* Redefine memmove so that the compiler won't complain about the type
29 mismatch with the IFUNC selector in strong_alias, below. */
30# undef memmove
31# define memmove __redirect_memmove
32# include <string.h>
33# undef memmove
34
35extern __typeof (__redirect_memmove) __memmove_sse2 attribute_hidden;
36extern __typeof (__redirect_memmove) __memmove_ssse3 attribute_hidden;
37extern __typeof (__redirect_memmove) __memmove_ssse3_back attribute_hidden;
38extern __typeof (__redirect_memmove) __memmove_avx_unaligned attribute_hidden;
39# ifdef HAVE_AVX512_ASM_SUPPORT
40 extern __typeof (__redirect_memmove) __memmove_avx512_no_vzeroupper attribute_hidden;
41# endif
42
43#endif
44
45#include "string/memmove.c"
46
47#if IS_IN (libc)
48# include <shlib-compat.h>
49# include "init-arch.h"
50
51/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
52 ifunc symbol properly. */
53extern __typeof (__redirect_memmove) __libc_memmove;
54libc_ifunc (__libc_memmove,
55#ifdef HAVE_AVX512_ASM_SUPPORT
56 HAS_ARCH_FEATURE (AVX512F_Usable)
57 && HAS_ARCH_FEATURE (Prefer_No_VZEROUPPER)
58 ? __memmove_avx512_no_vzeroupper
59 :
60#endif
61 (HAS_ARCH_FEATURE (AVX_Fast_Unaligned_Load)
62 ? __memmove_avx_unaligned
63 : (HAS_CPU_FEATURE (SSSE3)
64 ? (HAS_ARCH_FEATURE (Fast_Copy_Backward)
65 ? __memmove_ssse3_back : __memmove_ssse3)
66 : __memmove_sse2)));
67
68strong_alias (__libc_memmove, memmove)
69
70# if SHLIB_COMPAT (libc, GLIBC_2_2_5, GLIBC_2_14)
71compat_symbol (libc, memmove, memcpy, GLIBC_2_2_5);
72# endif
73#endif
74