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.\" $MidnightBSD$ |
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.\" Copyright (c) 1985, 1991 Regents of the University of California. |
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.\" All rights reserved. |
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.\" |
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.\" Redistribution and use in source and binary forms, with or without |
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.\" modification, are permitted provided that the following conditions |
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.\" are met: |
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.\" 1. Redistributions of source code must retain the above copyright |
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.\" notice, this list of conditions and the following disclaimer. |
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.\" 2. Redistributions in binary form must reproduce the above copyright |
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.\" notice, this list of conditions and the following disclaimer in the |
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.\" documentation and/or other materials provided with the distribution. |
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.\" 4. Neither the name of the University nor the names of its contributors |
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.\" may be used to endorse or promote products derived from this software |
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.\" without specific prior written permission. |
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.\" |
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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.\" SUCH DAMAGE. |
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.\" |
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.\" from: @(#)ieee.3 6.4 (Berkeley) 5/6/91 |
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.\" $FreeBSD: stable/10/lib/msun/man/ieee_test.3 165906 2007-01-09 01:02:06Z imp $ |
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.\" |
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.Dd November 6, 2005 |
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.Dt IEEE_TEST 3 |
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.Os |
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.Sh NAME |
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.Nm scalb , |
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.Nm scalbf , |
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.Nm significand , |
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.Nm significandf |
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.Nd IEEE test functions |
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.Sh LIBRARY |
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.Lb libm |
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.Sh SYNOPSIS |
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.In math.h |
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.Ft double |
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.Fn scalb "double x" "double n" |
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.Ft float |
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.Fn scalbf "float x" "float n" |
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.Ft double |
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.Fn significand "double x" |
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.Ft float |
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.Fn significandf "float x" |
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.Sh DESCRIPTION |
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These functions allow users to test conformance to |
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.St -ieee754 . |
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Their use is not otherwise recommended. |
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.Pp |
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.Fn scalb x n |
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and |
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.Fn scalbf x n |
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return |
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.Fa x Ns \(**(2** Ns Fa n ) |
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computed by exponent manipulation. |
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If |
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.Fa n |
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is not an integer, \*(Pm\*(If, or an \*(Na, the result is unspecified. |
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.Pp |
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.Fn significand x |
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and |
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.Fn significandf x |
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return |
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.Fa sig , |
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where |
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.Fa x |
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:= |
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.Fa sig No \(** 2** Ns Fa n |
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with 1 \(<= |
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.Fa sig |
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< 2. |
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.Fn significand x |
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and |
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.Fn significandf x |
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are not defined when |
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.Fa x |
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is 0, \*(Pm\*(If, or \*(Na. |
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.Sh SEE ALSO |
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.Xr ieee 3 , |
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.Xr math 3 |
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.Sh STANDARDS |
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.St -ieee754 |
