/*
 * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
 * 
 * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code 
 * as defined in and that are subject to the Apple Public Source License 
 * Version 2.0 (the 'License'). You may not use this file except in 
 * compliance with the License.  The rights granted to you under the 
 * License may not be used to create, or enable the creation or 
 * redistribution of, unlawful or unlicensed copies of an Apple operating 
 * system, or to circumvent, violate, or enable the circumvention or 
 * violation of, any terms of an Apple operating system software license 
 * agreement.
 *
 * Please obtain a copy of the License at 
 * http://www.opensource.apple.com/apsl/ and read it before using this 
 * file.
 *
 * The Original Code and all software distributed under the License are 
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
 * Please see the License for the specific language governing rights and 
 * limitations under the License.
 *
 * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
 */
/* Copyright (c) 1992, 1997-1998 Apple Computer, Inc.  All rights reserved.
 *
 *      File:  machdep/ppc/libc/ffs.s
 *
 *	int ffs(int value)
 *
 *	DESCRIPTION
 *		The ffs() function finds the first bit set in value and returns the
 *		index of that bit.  Bits are numbered starting from 1, starting at
 *		the right-most bit. A return value of 0 means that the argument was
 *
 * HISTORY
 *	14-Aug-1998	Umesh Vaishampayan	(umeshv@apple.com)
 *		Optimized!
 *
 *  10-Mar-1998 Matt Watson (mwatson@apple.com)
 *      Correctified
 *
 *  19-Jan-1998 Matt Watson (mwatson@apple.com)
 *      Simplified
 *
 *  24-Jan-1997 Umesh Vaishampayan (umeshv@NeXT.com)
 *      Ported to PPC. 
 */

.text
.align 4
.globl _ffs
_ffs:					/* Cycles */
	neg		r0,r3		/* 0 */
	and		r3,r0,r3	/* 1 */
	li		r4, 32		/* 1 */
	cntlzw	r3,r3		/* 2 */
	subf	r3,r3,r4	/* 3 */
	blr

	.globl	_abs
_abs:
	srawi r0,r3,31
	xor r3,r0,r3
	subf r3,r0,r3
	blr

