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-.\" $OpenBSD: ieee_test.3,v 1.8 2003/02/27 00:10:58 jason Exp $
-.\" Copyright (c) 1985, 1991 Regents of the University of California.
-.\" All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\" notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\" notice, this list of conditions and the following disclaimer in the
-.\" documentation and/or other materials provided with the distribution.
-.\" 3. All advertising materials mentioning features or use of this software
-.\" must display the following acknowledgement:
-.\" This product includes software developed by the University of
-.\" California, Berkeley and its contributors.
-.\" 4. Neither the name of the University nor the names of its contributors
-.\" may be used to endorse or promote products derived from this software
-.\" without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\" from: @(#)ieee.3 6.4 (Berkeley) 5/6/91
-.\"
-.Dd March 10, 1994
-.Dt IEEE_TEST 3
-.Os
-.Sh NAME
-.Nm logb ,
-.Nm logbf ,
-.Nm scalb ,
-.Nm scalbf ,
-.Nm significand ,
-.Nm significandf
-.Nd IEEE test functions
-.Sh SYNOPSIS
-.Fd #include <math.h>
-.Ft double
-.Fn logb "double x"
-.Ft float
-.Fn logbf "float x"
-.Ft double
-.Fn scalb "double x" "double n"
-.Ft float
-.Fn scalbf "float x" "float n"
-.Ft double
-.Fn significand "double x"
-.Ft float
-.Fn significandf "float x"
-.Sh DESCRIPTION
-These functions allow users to test conformance to
-.St -ieee754 .
-Their use is not otherwise recommended.
-.Pp
-.Fn logb x
-returns
-.Fa x Ns 's exponent
-.Fa n ,
-a signed integer converted to double\-precision floating\-point.
-.Fn logb \*(Pm\*(If
-= +\*(If;
-.Fn logb 0
-= -\*(If with a division by zero exception.
-.Fn logbf
-is the single precision form of
-.Fn logb .
-.Pp
-.Fn scalb x n
-returns
-.Fa x Ns \(**(2** Ns Fa n )
-computed by exponent manipulation.
-.Fn scalbf
-is the single precision form of
-.Fn scalb .
-.Pp
-.Fn significand x
-returns
-.Fa sig ,
-where
-.Fa x
-:=
-.Fa sig No \(** 2** Ns Fa n
-with 1 \(<=
-.Fa sig
-< 2.
-.Fn significand x
-is not defined when
-.Fa x
-is 0, \*(Pm\*(If, or \*(Na.
-.Fn significandf
-is the single precision for of
-.Fn significand .
-.Sh SEE ALSO
-.Xr ieee 3 ,
-.Xr math 3
-.Sh STANDARDS
-.St -ieee754