2 highbit - index of highest bit in binary representation of integer
13 If x is a nonzero integer, highbit(x) returns the index of the
14 highest bit in the binary representation of abs(x). Equivalently,
15 highbit(x) = n if 2^n <= abs(x) < 2^(n + 1); the binary
16 representation of x then has n + 1 digits.
19 ; print highbit(2), highbit(3), highbit(4), highbit(-15), highbit(2^27)
26 LEN zhighbit(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: highbit,v 30.1 2007/03/16 11:10:42 chongo Exp $
49 ## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/highbit,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/