1  /* Multiple versions of memchr. AARCH64 version.
       2     Copyright (C) 2018-2023 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 memchr so that the compiler won't complain about the type
      23     mismatch with the IFUNC selector in strong_alias, below.  */
      24  # undef memchr
      25  # define memchr __redirect_memchr
      26  # include <string.h>
      27  # include <init-arch.h>
      28  
      29  extern __typeof (__redirect_memchr) __memchr;
      30  
      31  extern __typeof (__redirect_memchr) __memchr_generic attribute_hidden;
      32  extern __typeof (__redirect_memchr) __memchr_nosimd attribute_hidden;
      33  
      34  libc_ifunc (__memchr,
      35  	    ((IS_EMAG (midr)
      36  	       ? __memchr_nosimd
      37  	       : __memchr_generic)));
      38  
      39  # undef memchr
      40  strong_alias (__memchr, memchr);
      41  #endif