1  /* Multiple versions of memmove. PowerPC64 version.
       2     Copyright (C) 2014-2023 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 lib and for
      20     DSO.  In static binaries we need memmove before the initialization
      21     happened.  */
      22  #if defined SHARED && IS_IN (libc)
      23  /* Redefine memmove so that the compiler won't complain about the type
      24     mismatch with the IFUNC selector in strong_alias, below.  */
      25  # undef memmove
      26  # define memmove __redirect_memmove
      27  # include <string.h>
      28  # include "init-arch.h"
      29  
      30  extern __typeof (__redirect_memmove) __libc_memmove;
      31  extern __typeof (__redirect_memmove) __memmove_ppc attribute_hidden;
      32  extern __typeof (__redirect_memmove) __memmove_power7 attribute_hidden;
      33  #ifdef __LITTLE_ENDIAN__
      34  extern __typeof (__redirect_memmove) __memmove_power10 attribute_hidden;
      35  #endif
      36  
      37  libc_ifunc (__libc_memmove,
      38  #ifdef __LITTLE_ENDIAN__
      39  	    (hwcap2 & PPC_FEATURE2_ARCH_3_1
      40  	     && hwcap2 & PPC_FEATURE2_HAS_ISEL
      41  	     && hwcap & PPC_FEATURE_HAS_VSX)
      42  	    ? __memmove_power10 :
      43  #endif
      44  		     (hwcap & PPC_FEATURE_ARCH_2_06
      45  		      && hwcap & PPC_FEATURE_HAS_ALTIVEC)
      46  		     ? __memmove_power7
      47  		     : __memmove_ppc);
      48  
      49  #undef memmove
      50  strong_alias (__libc_memmove, memmove);
      51  libc_hidden_ver (__libc_memmove, memmove);
      52  #else
      53  # include <string/memmove.c>
      54  #endif