| 1 | /* Multiple versions of memmove. AARCH64 version. |
|---|---|
| 2 | Copyright (C) 2017-2024 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 | |
| 29 | extern __typeof (__redirect_memmove) __libc_memmove; |
| 30 | |
| 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_a64fx attribute_hidden; |
| 35 | extern __typeof (__redirect_memmove) __memmove_sve attribute_hidden; |
| 36 | extern __typeof (__redirect_memmove) __memmove_mops attribute_hidden; |
| 37 | |
| 38 | static inline __typeof (__redirect_memmove) * |
| 39 | select_memmove_ifunc (void) |
| 40 | { |
| 41 | INIT_ARCH (); |
| 42 | |
| 43 | if (mops) |
| 44 | return __memmove_mops; |
| 45 | |
| 46 | if (sve && HAVE_AARCH64_SVE_ASM) |
| 47 | { |
| 48 | if (IS_A64FX (midr)) |
| 49 | return __memmove_a64fx; |
| 50 | return prefer_sve_ifuncs ? __memmove_sve : __memmove_generic; |
| 51 | } |
| 52 | |
| 53 | if (IS_THUNDERX (midr)) |
| 54 | return __memmove_thunderx; |
| 55 | |
| 56 | if (IS_THUNDERX2 (midr) || IS_THUNDERX2PA (midr)) |
| 57 | return __memmove_thunderx2; |
| 58 | |
| 59 | return __memmove_generic; |
| 60 | } |
| 61 | |
| 62 | libc_ifunc (__libc_memmove, select_memmove_ifunc ()); |
| 63 | |
| 64 | # undef memmove |
| 65 | strong_alias (__libc_memmove, memmove); |
| 66 | #endif |
| 67 |