2 lowbit - index of lowest nonzero bit in binary representation of integer
13 If x is a nonzero integer, lowbit(x) returns the index of the
14 lowest nonzero bit in the binary representation of abs(x). Equivalently,
15 lowbit(x) is the greatest integer for which x/2^n is an integer;
16 the binary representation of x then ends with n zero bits.
19 ; print lowbit(2), lowbit(3), lowbit(4), lowbit(-15), lowbit(2^27)
26 long zlowbit(ZVALUE x);
31 ## Copyright (C) 1999 Landon Curt Noll
33 ## Calc is open software; you can redistribute it and/or modify it under
34 ## the terms of the version 2.1 of the GNU Lesser General Public License
35 ## as published by the Free Software Foundation.
37 ## Calc is distributed in the hope that it will be useful, but WITHOUT
38 ## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
39 ## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
40 ## Public License for more details.
42 ## A copy of version 2.1 of the GNU Lesser General Public License is
43 ## distributed with calc under the filename COPYING-LGPL. You should have
44 ## received a copy with calc; if not, write to Free Software Foundation, Inc.
45 ## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
47 ## @(#) $Revision: 30.1 $
48 ## @(#) $Id: lowbit,v 30.1 2007/03/16 11:10:42 chongo Exp $
49 ## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/lowbit,v $
51 ## Under source code control: 1995/10/03 10:40:02
52 ## File existed as early as: 1995
54 ## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
55 ## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/