sysdeps/s390/s390-64/strcmp.S

   1 /* strcmp - compare two string.  64 bit S/390 version.
   2    This file is part of the GNU C Library.
   3    Copyright (C) 2001-2015 Free Software Foundation, Inc.
   4    Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 /* INPUT PARAMETERS
  21      %r2 = address of string 1
  22      %r3 = address of string 2.  */
  23
  24 #include "sysdep.h"
  25 #include "asm-syntax.h"
  26
  27         .text
  28 ENTRY(strcmp)
  29         slr   %r0,%r0
  30 0:      clst  %r2,%r3
  31         jo    0b
  32         jp    1f
  33         jm    2f
  34         slgr  %r2,%r2
  35         br    %r14
  36 1:      lghi  %r2,1
  37         br    %r14
  38 2:      lghi  %r2,-1
  39         br    %r14
  40 END(strcmp)
  41 libc_hidden_builtin_def (strcmp)