1  /* Multiple versions of memmove.
       2     Copyright (C) 2016-2023 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-memcpy.h>
      20  
      21  #if HAVE_MEMMOVE_IFUNC
      22  /* If we don't use ifunc, an alias is defined for memmove
      23     in sysdeps/s390/memmove-c.c or sysdeps/s390/memcpy.S
      24     depending on the used default implementation.  */
      25  # undef memmove
      26  # define memmove __redirect_memmove
      27  # include <string.h>
      28  # include <ifunc-resolve.h>
      29  # undef memmove
      30  
      31  # if HAVE_MEMMOVE_C
      32  extern __typeof (__redirect_memmove) MEMMOVE_C attribute_hidden;
      33  # endif
      34  
      35  # if HAVE_MEMMOVE_Z13
      36  extern __typeof (__redirect_memmove) MEMMOVE_Z13 attribute_hidden;
      37  # endif
      38  
      39  # if HAVE_MEMMOVE_ARCH13
      40  extern __typeof (__redirect_memmove) MEMMOVE_ARCH13 attribute_hidden;
      41  # endif
      42  
      43  s390_libc_ifunc_expr (__redirect_memmove, memmove,
      44  		      ({
      45  			s390_libc_ifunc_expr_stfle_init ();
      46  			(HAVE_MEMMOVE_ARCH13 && (hwcap & HWCAP_S390_VXRS_EXT2)
      47  			 && S390_IS_ARCH13_MIE3 (stfle_bits))
      48  			  ? MEMMOVE_ARCH13
      49  			  : (HAVE_MEMMOVE_Z13 && (hwcap & HWCAP_S390_VX))
      50  			  ? MEMMOVE_Z13
      51  			  : MEMMOVE_DEFAULT;
      52  		      })
      53  		      )
      54  #endif