mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-12-21 08:24:10 +01:00
84 lines
2.4 KiB
Groff
84 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.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.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 .
|
|
They supersede the non-standard
|
|
.Xr fpgetround 3
|
|
and
|
|
.Xr fpsetround 3
|
|
functions.
|