1.\" $OpenBSD: scalbn.3,v 1.2 2009/07/29 19:07:56 martynas Exp $ 2.\" Copyright (c) 1985, 1991 Regents of the University of California. 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 3. Neither the name of the University nor the names of its contributors 14.\" may be used to endorse or promote products derived from this software 15.\" without specific prior written permission. 16.\" 17.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27.\" SUCH DAMAGE. 28.\" 29.\" from: @(#)ieee.3 6.4 (Berkeley) 5/6/91 30.\" 31.Dd $Mdocdate: July 29 2009 $ 32.Dt SCALBN 3 33.Os 34.Sh NAME 35.Nm scalbln , 36.Nm scalblnf , 37.Nm scalblnl , 38.Nm scalbn , 39.Nm scalbnf , 40.Nm scalbnl 41.Nd adjust exponent by radix 42.Sh SYNOPSIS 43.Fd #include <math.h> 44.Ft double 45.Fn scalbln "double x" "long n" 46.Ft float 47.Fn scalblnf "float x" "long n" 48.Ft long double 49.Fn scalblnl "long double x" "long n" 50.Ft double 51.Fn scalbn "double x" "int n" 52.Ft float 53.Fn scalbnf "float x" "int n" 54.Ft long double 55.Fn scalbnl "long double x" "int n" 56.Sh DESCRIPTION 57.Fn scalbln 58and 59.Fn scalbn 60return 61.Fa x Ns \(**(2** Ns Fa n ) 62computed by exponent manipulation. 63The 64.Fn scalblnf 65and 66.Fn scalbnf 67functions are single precision versions of 68.Fn scalbln 69and 70.Fn scalbn , 71respectively. 72The 73.Fn scalblnl 74and 75.Fn scalbnl 76functions are extended precision versions of 77.Fn scalbln 78and 79.Fn scalbn , 80respectively. 81.Sh SEE ALSO 82.Xr math 3 83.Sh STANDARDS 84.St -ieee754 85.Sh HISTORY 86The 87.Nm scalbln , 88.Nm scalblnf 89and 90.Nm scalblnl 91functions appeared in 92.Ox 4.7 . 93The 94.Nm scalbn , 95.Nm scalbnf , 96and 97.Nm scalbnl , 98functions appeared in 99.Bx 4.3 , 100.Nx 1.1 101and 102.Ox 4.5 , 103respectively. 104