717d9cdd57
1) Changed LIB_SCCS and SYSLIB_SCCS to LIB_RCS and SYSLIB_RCS. 2) Changed sccsid[] variables to rcsid[] 3) Moved all RCSID strings into .text 4) Converted all SCCSID's to RCS $Id$'s 5) Added missing $Id$'s after copyright.
60 lines
2.3 KiB
ArmAsm
60 lines
2.3 KiB
ArmAsm
/*
|
|
* Copyright (c) 1993 Winning Strategies, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Winning Strategies, Inc.
|
|
* 4. The name of the author may not be used to endorse or promote products
|
|
* derived from this software withough specific prior written permission
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* $Id: ffs.S,v 1.1 1994/08/05 01:18:26 wollman Exp $
|
|
*/
|
|
|
|
#if defined(LIBC_RCS) && !defined(lint)
|
|
.text
|
|
.asciz "$Id: ffs.S,v 1.1 1994/08/05 01:18:26 wollman Exp $"
|
|
#endif /* LIBC_RCS and not lint */
|
|
|
|
#include "DEFS.h"
|
|
|
|
/*
|
|
* ffs(value)
|
|
* finds the first bit set in value and returns the index of
|
|
* that bit. Bits are numbered starting from 1, starting at the
|
|
* rightmost bit. A return value of 0 means that the argument
|
|
* was zero.
|
|
*
|
|
* Written by:
|
|
* J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
|
|
*/
|
|
|
|
ENTRY(ffs)
|
|
bsfl 4(%esp),%eax
|
|
jz L1 /* ZF is set if all bits are 0 */
|
|
incl %eax /* bits numbered from 1, not 0 */
|
|
ret
|
|
|
|
.align 2
|
|
L1: xorl %eax,%eax /* clear result */
|
|
ret
|