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.\" $FreeBSD$ 30.\" 31.Dd November 6, 2005 32.Dt IEEE_TEST 3 33.Os 34.Sh NAME 35.Nm scalb , 36.Nm scalbf , 37.Nm significand , 38.Nm significandf 39.Nd IEEE test functions 40.Sh LIBRARY 41.Lb libm 42.Sh SYNOPSIS 43.In math.h 44.Ft double 45.Fn scalb "double x" "double n" 46.Ft float 47.Fn scalbf "float x" "float n" 48.Ft double 49.Fn significand "double x" 50.Ft float 51.Fn significandf "float x" 52.Sh DESCRIPTION 53These functions allow users to test conformance to 54.St -ieee754 . 55Their use is not otherwise recommended. 56.Pp 57.Fn scalb x n 58and 59.Fn scalbf x n 60return 61.Fa x Ns \(**(2** Ns Fa n ) 62computed by exponent manipulation. 63If 64.Fa n 65is not an integer, \*(Pm\*(If, or an \*(Na, the result is unspecified. 66.Pp 67.Fn significand x 68and 69.Fn significandf x 70return 71.Fa sig , 72where 73.Fa x 74:= 75.Fa sig No \(** 2** Ns Fa n 76with 1 \(<= 77.Fa sig 78< 2. 79.Fn significand x 80and 81.Fn significandf x 82are not defined when 83.Fa x 84is 0, \*(Pm\*(If, or \*(Na. 85.Sh SEE ALSO 86.Xr ieee 3 , 87.Xr math 3 88.Sh STANDARDS 89.St -ieee754 90