freebsd-dev/lib/msun/man/copysign.3
Warner Losh fbbd9655e5 Renumber copyright clause 4
Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by:	Jan Schaumann <jschauma@stevens.edu>
Pull Request:	https://github.com/freebsd/freebsd/pull/96
2017-02-28 23:42:47 +00:00

87 lines
2.4 KiB
Groff

.\" Copyright (c) 1985, 1991 Regents of the University of California.
.\" All rights reserved.
.\"
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.\" modification, are permitted provided that the following conditions
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" from: @(#)ieee.3 6.4 (Berkeley) 5/6/91
.\" $FreeBSD$
.\"
.Dd January 26, 2005
.Dt COPYSIGN 3
.Os
.Sh NAME
.Nm copysign ,
.Nm copysignf ,
.Nm copysignl
.Nd copy sign
.Sh LIBRARY
.Lb libm
.Sh SYNOPSIS
.In math.h
.Ft double
.Fn copysign "double x" "double y"
.Ft float
.Fn copysignf "float x" "float y"
.Ft long double
.Fn copysignl "long double x" "long double y"
.Sh DESCRIPTION
The
.Fn copysign ,
.Fn copysignf
and
.Fn copysignl
functions
return
.Fa x
with its sign changed to
.Fa y Ns 's .
.Sh SEE ALSO
.Xr fabs 3 ,
.Xr fdim 3 ,
.Xr ieee 3 ,
.Xr math 3
.Sh STANDARDS
The
.Fn copysign ,
.Fn copysignf ,
and
.Fn copysignl
routines conform to
.St -isoC-99 .
They implement the Copysign function recommended by
.St -ieee754 .
.Sh HISTORY
The
.Fn copysign ,
.Fn copysignf ,
and
.Fn copysignl
functions appeared in
.Bx 4.3 ,
.Fx 2.0 ,
and
.Fx 5.3 ,
respectively.