sysdeps/aarch64/multiarch/memcpy.c

   1 /* Multiple versions of memcpy. AARCH64 version.
   2    Copyright (C) 2017-2020 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
  37 libc_ifunc (__libc_memcpy,
  38             (IS_THUNDERX (midr)
  39              ? __memcpy_thunderx
  40              : (IS_FALKOR (midr) || IS_PHECDA (midr) || IS_KUNPENG920 (midr)
  41                 ? __memcpy_falkor
  42                 : (IS_THUNDERX2 (midr) || IS_THUNDERX2PA (midr)
  43                   ? __memcpy_thunderx2
  44                   : (IS_NEOVERSE_N1 (midr) || IS_NEOVERSE_N2 (midr)
  45                      || IS_NEOVERSE_V1 (midr)
  46                      ? __memcpy_simd
  47                      : __memcpy_generic)))));
  48
  49 # undef memcpy
  50 strong_alias (__libc_memcpy, memcpy);
  51 #endif