1/*	$OpenBSD: ffs.S,v 1.7 2018/01/18 08:23:44 guenther Exp $ */
2/*
3 * Written by J.T. Conklin <jtc@netbsd.org>.
4 * Public domain.
5 */
6
7#include "DEFS.h"
8
9ENTRY(ffs)
10	bsfl	4(%esp),%eax
11	jz	L1	 		/* ZF is set if all bits are 0 */
12	incl	%eax			/* bits numbered from 1, not 0 */
13	ret
14
15	.align 2,0xcc
16L1:	xorl	%eax,%eax		/* clear result */
17	ret
18END(ffs)
19.protected ffs
20