1.\" Copyright (c) 1985, 1991 Regents of the University of California. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" from: @(#)ieee.3 6.4 (Berkeley) 5/6/91 33.\" $FreeBSD$ 34.\" 35.Dd January 26, 2005 36.Dt SCALBN 3 37.Os 38.Sh NAME 39.Nm scalbln , 40.Nm scalblnf , 41.Nm scalbn , 42.Nm scalbnf 43.Nd adjust exponent 44.Sh LIBRARY 45.Lb libm 46.Sh SYNOPSIS 47.In math.h 48.Ft double 49.Fn scalbln "double x" "long n" 50.Ft float 51.Fn scalblnf "float x" "long n" 52.Ft double 53.Fn scalbn "double x" "int n" 54.Ft float 55.Fn scalbnf "float x" "int n" 56.Sh DESCRIPTION 57.Fn scalbln , 58.Fn scalblnf , 59.Fn scalbn , 60and 61.Fn scalbnf 62return 63.Fa x Ns \(**(2** Ns Fa n ) 64computed by exponent manipulation. 65.Sh SEE ALSO 66.Xr ieee 3 , 67.Xr math 3 68.Sh STANDARDS 69These routines conform to 70.St -isoC-99 , 71and they implement the Scalb function recommended by 72.St -ieee754 . 73.Sh HISTORY 74The 75.Fn scalbn 76and 77.Fn scalbnf 78functions appeared in 79.Bx 4.3 80and 81.Fx 2.0 , 82respectively. 83The 84.Fn scalbln 85and 86.Fn scalblnf 87functions first appeared in 88.Fx 5.3 . 89