glibc/sysdeps/s390/s390-32/strcmp.S

/* strcmp - compare two string.  S/390 version.
   This file is part of the GNU C Library.
   Copyright (C) 2001 Free Software Foundation, Inc.
   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

/* INPUT PARAMETERS
     %r2 = address of string 1
     %r3 = address of string 2.  */

#include "sysdep.h"
#include "asm-syntax.h"

	.text
ENTRY(strcmp)
        slr   %r0,%r0
0:	clst  %r2,%r3
	jo    0b
	jp    1f
	jm    2f
	slr   %r2,%r2
	br    %r14
1:	lhi   %r2,1
	br    %r14
2:	lhi   %r2,-1
	br    %r14
END(strcmp)