60 lines
2.3 KiB
ArmAsm
60 lines
2.3 KiB
ArmAsm
|
/*
|
||
|
|
* Copyright (c) 1993 Winning Strategies, Inc.
|
||
|
|
* 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. All advertising materials mentioning features or use of this software
|
||
|
|
* must display the following acknowledgement:
|
||
|
|
* This product includes software developed by Winning Strategies, Inc.
|
||
|
|
* 4. The name of the author may not be used to endorse or promote products
|
||
|
|
* derived from this software withough specific prior written permission
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
|
||
|
|
*
|
||
|
|
* $Id: strlen.S,v 1.1 1993/10/07 00:19:34 cgd Exp $
|
||
|
|
*/
|
||
|
|
|
||
|
|
#if defined(LIBC_RCS) && !defined(lint)
|
||
|
|
.text
|
||
|
|
.asciz "$Id: strlen.S,v 1.1 1993/10/07 00:19:34 cgd Exp $"
|
||
|
|
#endif /* LIBC_RCS and not lint */
|
||
|
|
|
||
|
|
#include "DEFS.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
* strlen (s)
|
||
|
|
* compute the length of the string s.
|
||
|
|
*
|
||
|
|
* Written by:
|
||
|
|
* J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
|
||
|
|
*/
|
||
|
|
|
||
|
|
ENTRY(strlen)
|
||
|
|
pushl %edi
|
||
|
|
movl 8(%esp),%edi /* string address */
|
||
|
|
cld /* set search forward */
|
||
|
|
xorl %eax,%eax /* set search for null terminator */
|
||
|
|
movl $-1,%ecx /* set search for lots of characters */
|
||
|
|
repne /* search! */
|
||
|
|
scasb
|
||
|
|
notl %ecx /* get length by taking complement */
|
||
|
|
leal -1(%ecx),%eax /* and subtracting one */
|
||
|
|
popl %edi
|
||
|
|
ret
|