\" $NetBSD: fegetround.3,v 1.1 2010/07/31 21:47:53 joerg Exp $
\" 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.
\"
Dd May 8, 2004
Dt FEGETROUND 3
Os
Sh NAME
Nm fegetround ,
Nm fesetround
Nd floating-point rounding control
Sh LIBRARY
Lb libm
Sh SYNOPSIS
In fenv.h
Fd "#pragma STDC FENV_ACCESS ON"
Ft int
Fn fegetround void
Ft int
Fn fesetround "int round"
Sh DESCRIPTION
The
Fn fegetround
function determines the current floating-point rounding mode,
and the
Fn fesetround
function sets the current rounding mode to
Fa round .
The rounding mode is one of
Dv FE_TONEAREST , FE_DOWNWARD , FE_UPWARD ,
or
Dv FE_TOWARDZERO ,
as described in
Xr fenv 3 .
Sh RETURN VALUES
The
Fn fegetround
routine returns the current rounding mode.
The
Fn fesetround
function returns 0 on success and non-zero otherwise;
however, the present implementation always succeeds.
Sh SEE ALSO
Xr fenv 3 ,
Xr fpgetround 3 ,
Xr fpsetround 3
Sh STANDARDS
The
Fn fegetround
and
Fn fesetround
functions conform to
St -isoC-99 .
Sh HISTORY
These routines first appeared in
Fx 5.3
and
Nx 6.0 .
They supersede the non-standard
Xr fpgetround 3
and
Xr fpsetround 3
functions.
