mirror of
https://github.com/lcn2/calc.git
synced 2025-08-16 01:03:29 +03:00
56 lines
1.7 KiB
Plaintext
56 lines
1.7 KiB
Plaintext
NAME
|
|
highbit - index of highest bit in binary representation of integer
|
|
|
|
SYNOPSIS
|
|
highbit(x)
|
|
|
|
TYPES
|
|
x nonzero integer
|
|
|
|
return integer
|
|
|
|
DESCRIPTION
|
|
If x is a nonzero integer, highbit(x) returns the index of the
|
|
highest bit in the binary representation of abs(x). Equivalently,
|
|
highbit(x) = n if 2^n <= abs(x) < 2^(n + 1); the binary
|
|
representation of x then has n + 1 digits.
|
|
|
|
EXAMPLE
|
|
; print highbit(2), highbit(3), highbit(4), highbit(-15), highbit(2^27)
|
|
1 1 2 3 27
|
|
|
|
LIMITS
|
|
none
|
|
|
|
LINK LIBRARY
|
|
LEN zhighbit(ZVALUE x);
|
|
|
|
SEE ALSO
|
|
lowbit, digits
|
|
|
|
## Copyright (C) 1999 Landon Curt Noll
|
|
##
|
|
## Calc is open software; you can redistribute it and/or modify it under
|
|
## the terms of the version 2.1 of the GNU Lesser General Public License
|
|
## as published by the Free Software Foundation.
|
|
##
|
|
## Calc is distributed in the hope that it will be useful, but WITHOUT
|
|
## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
|
|
## Public License for more details.
|
|
##
|
|
## A copy of version 2.1 of the GNU Lesser General Public License is
|
|
## distributed with calc under the filename COPYING-LGPL. You should have
|
|
## received a copy with calc; if not, write to Free Software Foundation, Inc.
|
|
## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
##
|
|
## @(#) $Revision: 30.1 $
|
|
## @(#) $Id: highbit,v 30.1 2007/03/16 11:10:42 chongo Exp $
|
|
## @(#) $Source: /usr/local/src/bin/calc/help/RCS/highbit,v $
|
|
##
|
|
## Under source code control: 1995/10/03 10:40:02
|
|
## File existed as early as: 1995
|
|
##
|
|
## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
|
|
## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
|