Home | History | Annotate | Line # | Download | only in small
strlen.S revision 1.2 
      1  1.2  jakllsch /*	$NetBSD: strlen.S,v 1.2 2014/03/22 19:38:46 jakllsch Exp $	*/
      2  1.1     joerg /*-
      3  1.1     joerg  * Copyright (c) 2011 The NetBSD Foundation, Inc.
      4  1.1     joerg  * All rights reserved.
      5  1.1     joerg  *
      6  1.1     joerg  * This code is derived from software contributed to The NetBSD Foundation
      7  1.1     joerg  * by David Laight.
      8  1.1     joerg  *
      9  1.1     joerg  * Redistribution and use in source and binary forms, with or without
     10  1.1     joerg  * modification, are permitted provided that the following conditions
     11  1.1     joerg  * are met:
     12  1.1     joerg  * 1. Redistributions of source code must retain the above copyright
     13  1.1     joerg  *    notice, this list of conditions and the following disclaimer.
     14  1.1     joerg  * 2. Redistributions in binary form must reproduce the above copyright
     15  1.1     joerg  *    notice, this list of conditions and the following disclaimer in the
     16  1.1     joerg  *    documentation and/or other materials provided with the distribution.
     17  1.1     joerg  *
     18  1.1     joerg  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     19  1.1     joerg  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     20  1.1     joerg  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     21  1.1     joerg  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     22  1.1     joerg  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     23  1.1     joerg  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     24  1.1     joerg  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     25  1.1     joerg  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     26  1.1     joerg  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     27  1.1     joerg  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     28  1.1     joerg  * POSSIBILITY OF SUCH DAMAGE.
     29  1.1     joerg  */
     30  1.1     joerg 
     31  1.1     joerg #include <machine/asm.h>
     32  1.2  jakllsch 	RCSID("$NetBSD: strlen.S,v 1.2 2014/03/22 19:38:46 jakllsch Exp $")
     33  1.1     joerg ENTRY(strlen)
     34  1.1     joerg         movl    8(%esp), %ecx
     35  1.1     joerg         xorl    %eax, %eax
     36  1.1     joerg         dec     %eax
     37  1.1     joerg 1:
     38  1.1     joerg         incl    %eax
     39  1.1     joerg         cmpb    $0, 0(%ecx,%eax,1)
     40  1.1     joerg         jnz 1b
     41  1.1     joerg         ret
     42  1.2  jakllsch END(strlen)
     43