1 /* Multiple versions of memcpy. 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 memcpy so that the compiler won't complain about the type 23 mismatch with the IFUNC selector in strong_alias, below. */ 24 # undef memcpy 25 # define memcpy __redirect_memcpy 26 # include <string.h> 27 # include <init-arch.h> 28 29 extern __typeof (__redirect_memcpy) __libc_memcpy; 30 31 extern __typeof (__redirect_memcpy) __memcpy_generic attribute_hidden; 32 extern __typeof (__redirect_memcpy) __memcpy_simd attribute_hidden; 33 extern __typeof (__redirect_memcpy) __memcpy_thunderx attribute_hidden; 34 extern __typeof (__redirect_memcpy) __memcpy_thunderx2 attribute_hidden; 35 extern __typeof (__redirect_memcpy) __memcpy_falkor attribute_hidden; 36 extern __typeof (__redirect_memcpy) __memcpy_a64fx attribute_hidden; 37 extern __typeof (__redirect_memcpy) __memcpy_sve attribute_hidden; 38 39 static inline __typeof (__redirect_memcpy) * select_memcpy_ifunc(void)40select_memcpy_ifunc (void) 41 { 42 INIT_ARCH (); 43 44 if (IS_NEOVERSE_N1 (midr) || IS_NEOVERSE_N2 (midr)) 45 return __memcpy_simd; 46 47 if (sve && HAVE_AARCH64_SVE_ASM) 48 { 49 if (IS_A64FX (midr)) 50 return __memcpy_a64fx; 51 return __memcpy_sve; 52 } 53 54 if (IS_THUNDERX (midr)) 55 return __memcpy_thunderx; 56 57 if (IS_THUNDERX2 (midr) || IS_THUNDERX2PA (midr)) 58 return __memcpy_thunderx2; 59 60 if (IS_FALKOR (midr) || IS_PHECDA (midr)) 61 return __memcpy_falkor; 62 63 return __memcpy_generic; 64 } 65 66 libc_ifunc (__libc_memcpy, select_memcpy_ifunc ()); 67 68 # undef memcpy 69 strong_alias (__libc_memcpy, memcpy); 70 #endif 71