1  /* Multiple versions of memcmp.
       2     Copyright (C) 2015-2023 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  #include <ifunc-memcmp.h>
      20  #if HAVE_MEMCMP_IFUNC
      21  # define memcmp __redirect_memcmp
      22  # include <string.h>
      23  # undef memcmp
      24  # include <ifunc-resolve.h>
      25  
      26  # if HAVE_MEMCMP_Z900_G5
      27  extern __typeof (__redirect_memcmp) MEMCMP_Z900_G5 attribute_hidden;
      28  # endif
      29  
      30  # if HAVE_MEMCMP_Z10
      31  extern __typeof (__redirect_memcmp) MEMCMP_Z10 attribute_hidden;
      32  # endif
      33  
      34  # if HAVE_MEMCMP_Z196
      35  extern __typeof (__redirect_memcmp) MEMCMP_Z196 attribute_hidden;
      36  # endif
      37  
      38  s390_libc_ifunc_expr (__redirect_memcmp, memcmp,
      39  		      ({
      40  			s390_libc_ifunc_expr_stfle_init ();
      41  			(HAVE_MEMCMP_Z196 && S390_IS_Z196 (stfle_bits))
      42  			  ? MEMCMP_Z196
      43  			  : (HAVE_MEMCMP_Z10 && S390_IS_Z10 (stfle_bits))
      44  			  ? MEMCMP_Z10
      45  			  : MEMCMP_DEFAULT;
      46  		      })
      47  		      )
      48  weak_alias (memcmp, bcmp);
      49  strong_alias (memcmp, __memcmpeq)
      50  libc_hidden_def (__memcmpeq)
      51  #endif