1/*	$OpenBSD: ffs.S,v 1.2 1996/09/27 06:47:45 mickey Exp $	*/
2
3/*
4 * Written by J.T. Conklin <jtc@netbsd.org>.
5 * Public domain.
6 */
7
8#include <machine/asm.h>
9
10ENTRY(ffs)
11	bsfl	4(%esp),%eax
12	jz	L1	 		/* ZF is set if all bits are 0 */
13	incl	%eax			/* bits numbered from 1, not 0 */
14	ret
15
16	.align 2
17L1:	xorl	%eax,%eax		/* clear result */
18	ret
19