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. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" from: @(#)ieee.3 6.4 (Berkeley) 5/6/91 29.\" 30.Dd November 6, 2005 31.Dt IEEE_TEST 3 32.Os 33.Sh NAME 34.Nm scalb , 35.Nm scalbf , 36.Nm significand , 37.Nm significandf 38.Nd IEEE test functions 39.Sh LIBRARY 40.Lb libm 41.Sh SYNOPSIS 42.In math.h 43.Ft double 44.Fn scalb "double x" "double n" 45.Ft float 46.Fn scalbf "float x" "float n" 47.Ft double 48.Fn significand "double x" 49.Ft float 50.Fn significandf "float x" 51.Sh DESCRIPTION 52These functions allow users to test conformance to 53.St -ieee754 . 54Their use is not otherwise recommended. 55.Pp 56.Fn scalb x n 57and 58.Fn scalbf x n 59return 60.Fa x Ns \(**(2** Ns Fa n ) 61computed by exponent manipulation. 62If 63.Fa n 64is not an integer, \*(Pm\*(If, or an \*(Na, the result is unspecified. 65.Pp 66.Fn significand x 67and 68.Fn significandf x 69return 70.Fa sig , 71where 72.Fa x 73:= 74.Fa sig No \(** 2** Ns Fa n 75with 1 \(<= 76.Fa sig 77< 2. 78.Fn significand x 79and 80.Fn significandf x 81are not defined when 82.Fa x 83is 0, \*(Pm\*(If, or \*(Na. 84.Sh SEE ALSO 85.Xr ieee 3 , 86.Xr math 3 87.Sh STANDARDS 88.St -ieee754 89