mirror of
https://gitlab.com/sortix/sortix.git
synced 2023-02-13 20:55:38 -05:00
90 lines
2.4 KiB
Groff
90 lines
2.4 KiB
Groff
|
.\" Copyright (c) 2004 David Schultz <das@FreeBSD.org>
|
||
|
|
.\" 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 $
|
||
|
|
.\" $NetBSD$
|
||
|
|
.\"
|
||
|
|
.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 .
|