\" Copyright (c) 2004 David Schultz <
[email protected]>
\" 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.
\"
\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
\"
\" $FreeBSD: src/lib/msun/man/fdim.3,v 1.1 2004/06/30 07:04:01 das Exp $
\" $NetBSD: fdim.3,v 1.3 2010/03/08 02:35:50 snj Exp $
\"
Dd June 29, 2004
Dt FDIM 3
Os
Sh NAME
Nm fdim ,
Nm fdimf ,
Nm fdiml
Nd positive difference functions
Sh LIBRARY
Lb libm
Sh SYNOPSIS
In math.h
Ft double
Fn fdim "double x" "double y"
Ft float
Fn fdimf "float x" "float y"
Ft long double
Fn fdiml "long double x" "long double y"
Sh DESCRIPTION
The
Fn fdim ,
Fn fdimf ,
and
Fn fdiml
functions return the positive difference between
Fa x
and
Fa y .
That is, if
Fa x\- Ns Fa y
is positive, then
Fa x\- Ns Fa y
is returned.
If either
Fa x
or
Fa y
is an \*(Na, then an \*(Na is returned.
Otherwise, the result is
Li +0.0 .
Pp
Overflow or underflow may occur iff the exact result is not
representable in the return type.
No other exceptions are raised.
Sh SEE ALSO
Xr fabs 3 ,
Xr fmax 3 ,
Xr fmin 3 ,
Xr math 3
Sh STANDARDS
The
Fn fdim ,
Fn fdimf ,
and
Fn fdiml
functions conform to
St -isoC-99 .
Sh HISTORY
These routines first appeared in
Fx 5.3
and
Nx 5.1 .
