1  /* Multiple versions of memcpy. PowerPC64 version.
       2     Copyright (C) 2013-2023 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 memcpy before the initialization
      21     happened.  */
      22  #if defined SHARED && IS_IN (libc)
      23  /* Redefine memcpy so that the compiler won't complain about the type
      24     mismatch with the IFUNC selector in strong_alias, below.  */
      25  # undef memcpy
      26  # define memcpy __redirect_memcpy
      27  # include <string.h>
      28  # include "init-arch.h"
      29  
      30  extern __typeof (__redirect_memcpy) __libc_memcpy;
      31  
      32  extern __typeof (__redirect_memcpy) __memcpy_ppc attribute_hidden;
      33  extern __typeof (__redirect_memcpy) __memcpy_power4 attribute_hidden;
      34  extern __typeof (__redirect_memcpy) __memcpy_cell attribute_hidden;
      35  extern __typeof (__redirect_memcpy) __memcpy_power6 attribute_hidden;
      36  extern __typeof (__redirect_memcpy) __memcpy_a2 attribute_hidden;
      37  extern __typeof (__redirect_memcpy) __memcpy_power7 attribute_hidden;
      38  extern __typeof (__redirect_memcpy) __memcpy_power8_cached attribute_hidden;
      39  # if defined __LITTLE_ENDIAN__
      40  extern __typeof (__redirect_memcpy) __memcpy_power10 attribute_hidden;
      41  # endif
      42  
      43  libc_ifunc (__libc_memcpy,
      44  # if defined __LITTLE_ENDIAN__
      45  	    (hwcap2 & PPC_FEATURE2_ARCH_3_1 && hwcap & PPC_FEATURE_HAS_VSX)
      46  	    ? __memcpy_power10 :
      47  # endif
      48  	    (hwcap2 & PPC_FEATURE2_ARCH_2_07
      49  	     && hwcap & PPC_FEATURE_HAS_ALTIVEC
      50  	     && use_cached_memopt)
      51  	    ? __memcpy_power8_cached :
      52  	      (hwcap & PPC_FEATURE_ARCH_2_06
      53  	       && hwcap & PPC_FEATURE_HAS_ALTIVEC)
      54  	      ? __memcpy_power7 :
      55  		(hwcap & PPC_FEATURE_ARCH_2_06)
      56  		? __memcpy_a2 :
      57  		  (hwcap & PPC_FEATURE_ARCH_2_05)
      58  		  ? __memcpy_power6 :
      59  		    (hwcap & PPC_FEATURE_CELL_BE)
      60  		    ? __memcpy_cell :
      61  		      (hwcap & PPC_FEATURE_POWER4)
      62  		      ? __memcpy_power4
      63              : __memcpy_ppc);
      64  
      65  #undef memcpy
      66  strong_alias (__libc_memcpy, memcpy);
      67  libc_hidden_ver (__libc_memcpy, memcpy);
      68  #endif