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 November 6, 2005 36.Dt IEEE_TEST 3 37.Os 38.Sh NAME 39.Nm scalb , 40.Nm scalbf , 41.Nm significand , 42.Nm significandf 43.Nd IEEE test functions 44.Sh LIBRARY 45.Lb libm 46.Sh SYNOPSIS 47.In math.h 48.Ft double 49.Fn scalb "double x" "double n" 50.Ft float 51.Fn scalbf "float x" "float n" 52.Ft double 53.Fn significand "double x" 54.Ft float 55.Fn significandf "float x" 56.Sh DESCRIPTION 57These functions allow users to test conformance to 58.St -ieee754 . 59Their use is not otherwise recommended. 60.Pp 61.Fn scalb x n 62and 63.Fn scalbf x n 64return 65.Fa x Ns \(**(2** Ns Fa n ) 66computed by exponent manipulation. 67If 68.Fa n 69is not an integer, \*(Pm\*(If, or an \*(Na, the result is unspecified. 70.Pp 71.Fn significand x 72and 73.Fn significandf x 74return 75.Fa sig , 76where 77.Fa x 78:= 79.Fa sig No \(** 2** Ns Fa n 80with 1 \(<= 81.Fa sig 82< 2. 83.Fn significand x 84and 85.Fn significandf x 86are not defined when 87.Fa x 88is 0, \*(Pm\*(If, or \*(Na. 89.Sh SEE ALSO 90.Xr ieee 3 , 91.Xr math 3 92.Sh STANDARDS 93.St -ieee754 94