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 | |
35 | extern __typeof (__redirect_memmove) __memmove_sse2 attribute_hidden; |
36 | extern __typeof (__redirect_memmove) __memmove_ssse3 attribute_hidden; |
37 | extern __typeof (__redirect_memmove) __memmove_ssse3_back attribute_hidden; |
38 | extern __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. */ |
53 | extern __typeof (__redirect_memmove) __libc_memmove; |
54 | libc_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 | |
68 | strong_alias (__libc_memmove, memmove) |
69 | |
70 | # if SHLIB_COMPAT (libc, GLIBC_2_2_5, GLIBC_2_14) |
71 | compat_symbol (libc, memmove, memcpy, GLIBC_2_2_5); |
72 | # endif |
73 | #endif |
74 | |