1/* Multiple versions of memmove. AARCH64 version.
2 Copyright (C) 2017-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19/* Define multiple versions only for the definition in libc. */
20
21#if IS_IN (libc)
22/* Redefine memmove so that the compiler won't complain about the type
23 mismatch with the IFUNC selector in strong_alias, below. */
24# undef memmove
25# define memmove __redirect_memmove
26# include <string.h>
27# include <init-arch.h>
28
29extern __typeof (__redirect_memmove) __libc_memmove;
30
31extern __typeof (__redirect_memmove) __memmove_generic attribute_hidden;
32extern __typeof (__redirect_memmove) __memmove_simd attribute_hidden;
33extern __typeof (__redirect_memmove) __memmove_thunderx attribute_hidden;
34extern __typeof (__redirect_memmove) __memmove_thunderx2 attribute_hidden;
35extern __typeof (__redirect_memmove) __memmove_falkor attribute_hidden;
36# if HAVE_AARCH64_SVE_ASM
37extern __typeof (__redirect_memmove) __memmove_a64fx attribute_hidden;
38# endif
39
40libc_ifunc (__libc_memmove,
41 (IS_THUNDERX (midr)
42 ? __memmove_thunderx
43 : (IS_FALKOR (midr) || IS_PHECDA (midr)
44 ? __memmove_falkor
45 : (IS_THUNDERX2 (midr) || IS_THUNDERX2PA (midr)
46 ? __memmove_thunderx2
47 : (IS_NEOVERSE_N1 (midr) || IS_NEOVERSE_N2 (midr)
48 || IS_NEOVERSE_V1 (midr)
49 ? __memmove_simd
50# if HAVE_AARCH64_SVE_ASM
51 : (IS_A64FX (midr) && sve
52 ? __memmove_a64fx
53 : __memmove_generic))))));
54# else
55 : __memmove_generic)))));
56# endif
57# undef memmove
58strong_alias (__libc_memmove, memmove);
59#endif
60

source code of glibc/sysdeps/aarch64/multiarch/memmove.c