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[glibc.git] / sysdeps / aarch64 / multiarch / memmove.c
blob312f90f111868c71dd1f32f4a175a28e93c948ee
1 /* Multiple versions of memmove. AARCH64 version.
2 Copyright (C) 2017-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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/>. */
19 /* Define multiple versions only for the definition in libc. */
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>
29 extern __typeof (__redirect_memmove) __libc_memmove;
31 extern __typeof (__redirect_memmove) __memmove_generic attribute_hidden;
32 extern __typeof (__redirect_memmove) __memmove_thunderx attribute_hidden;
33 extern __typeof (__redirect_memmove) __memmove_thunderx2 attribute_hidden;
34 extern __typeof (__redirect_memmove) __memmove_falkor attribute_hidden;
35 extern __typeof (__redirect_memmove) __memmove_a64fx attribute_hidden;
36 extern __typeof (__redirect_memmove) __memmove_sve attribute_hidden;
38 static inline __typeof (__redirect_memmove) *
39 select_memmove_ifunc (void)
41 INIT_ARCH ();
43 if (sve && HAVE_AARCH64_SVE_ASM)
45 if (IS_A64FX (midr))
46 return __memmove_a64fx;
47 return __memmove_sve;
50 if (IS_THUNDERX (midr))
51 return __memmove_thunderx;
53 if (IS_THUNDERX2 (midr) || IS_THUNDERX2PA (midr))
54 return __memmove_thunderx2;
56 if (IS_FALKOR (midr) || IS_PHECDA (midr))
57 return __memmove_falkor;
59 return __memmove_generic;
62 libc_ifunc (__libc_memmove, select_memmove_ifunc ());
64 # undef memmove
65 strong_alias (__libc_memmove, memmove);
66 #endif