1  /* Multiple versions of memset.
       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 definition in libc.  */
      20  #if defined SHARED && IS_IN (libc)
      21  /* Redefine memset so that the compiler won't complain about the type
      22     mismatch with the IFUNC selector in strong_alias, below.  */
      23  # undef memset
      24  # define memset __redirect_memset
      25  # include <string.h>
      26  # include <shlib-compat.h>
      27  # include "init-arch.h"
      28  
      29  extern __typeof (__redirect_memset) __libc_memset;
      30  
      31  extern __typeof (__redirect_memset) __memset_ppc attribute_hidden;
      32  extern __typeof (__redirect_memset) __memset_power4 attribute_hidden;
      33  extern __typeof (__redirect_memset) __memset_power6 attribute_hidden;
      34  extern __typeof (__redirect_memset) __memset_power7 attribute_hidden;
      35  extern __typeof (__redirect_memset) __memset_power8 attribute_hidden;
      36  # ifdef __LITTLE_ENDIAN__
      37  extern __typeof (__redirect_memset) __memset_power10 attribute_hidden;
      38  # endif
      39  
      40  /* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
      41     ifunc symbol properly.  */
      42  libc_ifunc (__libc_memset,
      43  # ifdef __LITTLE_ENDIAN__
      44  	    (hwcap2 & PPC_FEATURE2_ARCH_3_1
      45  	     && hwcap2 & PPC_FEATURE2_HAS_ISEL
      46  	     && hwcap & PPC_FEATURE_HAS_VSX
      47  	     && GLRO(dl_cache_line_size) == 128)
      48  	    ? __memset_power10 :
      49  # endif
      50              (hwcap2 & PPC_FEATURE2_ARCH_2_07
      51  	     && hwcap & PPC_FEATURE_HAS_ALTIVEC
      52  	     && GLRO(dl_cache_line_size) == 128)
      53              ? __memset_power8 :
      54  	      (hwcap & PPC_FEATURE_ARCH_2_06
      55  	       && GLRO(dl_cache_line_size) == 128)
      56  	      ? __memset_power7 :
      57  		(hwcap & PPC_FEATURE_ARCH_2_05
      58  	         && GLRO(dl_cache_line_size) == 128)
      59  		? __memset_power6 :
      60  		  (hwcap & PPC_FEATURE_POWER4
      61  	           && GLRO(dl_cache_line_size) == 128)
      62  		  ? __memset_power4
      63              : __memset_ppc);
      64  
      65  #undef memset
      66  strong_alias (__libc_memset, memset);
      67  libc_hidden_ver (__libc_memset, memset);
      68  #endif