/*      $NetBSD: strcmp.S,v 1.2 2013/08/19 00:56:12 matt Exp $ */

/*
* Copyright (c) 2002 ARM Ltd
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. The name of the company may not be used to endorse or promote
*    products derived from this software without specific prior written
*    permission.
*
* THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include <machine/asm.h>

RCSID("$NetBSD: strcmp.S,v 1.2 2013/08/19 00:56:12 matt Exp $")

ENTRY(strcmp)
#if !defined(__thumb__)
1:      ldrb    r2, [r0], #1
       ldrb    r3, [r1], #1
       cmp     r2, #1
       cmpcs   r2, r3
#else
       subs    r1, r1, r0      /* this allows us to only one increment */
1:      ldrb    r2, [r0]
       ldrb    r3, [r1, r0]
       adds    r0, r0, #1      /* increment */
       cmp     r2, #1
       bcc     2f
       cmp     r2, r3
#endif
       beq     1b
2:      subs    r0, r2, r3
       RET
END(strcmp)