ffs.S revision 1.1 
11.1Schristos/*
21.1Schristos * Written by J.T. Conklin <jtc@NetBSD.org>.
31.1Schristos * Public domain.
41.1Schristos */
51.1Schristos
61.1Schristos#include <machine/asm.h>
71.1Schristos
81.1Schristos#if defined(LIBC_SCCS)
91.1Schristos	RCSID("$NetBSD: ffs.S,v 1.1 2005/12/20 19:28:49 christos Exp $")
101.1Schristos#endif
111.1Schristos
121.1SchristosENTRY(ffs)
131.1Schristos	bsfl	4(%esp),%eax
141.1Schristos	jz	L1	 		/* ZF is set if all bits are 0 */
151.1Schristos	incl	%eax			/* bits numbered from 1, not 0 */
161.1Schristos	ret
171.1Schristos
181.1Schristos	_ALIGN_TEXT
191.1SchristosL1:	xorl	%eax,%eax		/* clear result */
201.1Schristos	ret
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