1  /* strncmp variant information on S/390 version.
       2     Copyright (C) 2018-2023 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  #if defined USE_MULTIARCH && IS_IN (libc)		\
      20    && ! defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
      21  # define HAVE_STRNCMP_IFUNC	1
      22  #else
      23  # define HAVE_STRNCMP_IFUNC	0
      24  #endif
      25  
      26  #ifdef HAVE_S390_VX_ASM_SUPPORT
      27  # define HAVE_STRNCMP_IFUNC_AND_VX_SUPPORT HAVE_STRNCMP_IFUNC
      28  #else
      29  # define HAVE_STRNCMP_IFUNC_AND_VX_SUPPORT 0
      30  #endif
      31  
      32  #if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
      33  # define STRNCMP_DEFAULT	STRNCMP_Z13
      34  # define HAVE_STRNCMP_C		0
      35  # define HAVE_STRNCMP_Z13	1
      36  #else
      37  # define STRNCMP_DEFAULT	STRNCMP_C
      38  # define HAVE_STRNCMP_C		1
      39  # define HAVE_STRNCMP_Z13	HAVE_STRNCMP_IFUNC_AND_VX_SUPPORT
      40  #endif
      41  
      42  #if HAVE_STRNCMP_C
      43  # define STRNCMP_C		__strncmp_c
      44  #else
      45  # define STRNCMP_C		NULL
      46  #endif
      47  
      48  #if HAVE_STRNCMP_Z13
      49  # define STRNCMP_Z13		__strncmp_vx
      50  #else
      51  # define STRNCMP_Z13		NULL
      52  #endif