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Revision 1.1, Tue Mar 4 16:15:13 2008 UTC (16 years, 3 months ago) by nbrk
Branch point for: MAIN 

Initial revision

/*	$OpenBSD: strlen.S,v 1.2 1996/09/27 06:47:51 mickey Exp $	*/

/*
 * Written by J.T. Conklin <jtc@netbsd.org>.
 * Public domain.
 */

#include <machine/asm.h>

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