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1.\" Copyright (c) 2004 David Schultz <das@FreeBSD.org>
2.\" All rights reserved.
3.\"
4.\" Redistribution and use in source and binary forms, with or without
5.\" modification, are permitted provided that the following conditions
6.\" are met:
7.\" 1. Redistributions of source code must retain the above copyright
8.\"    notice, this list of conditions and the following disclaimer.
9.\" 2. Redistributions in binary form must reproduce the above copyright
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13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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24.\"
25.\" $FreeBSD: src/lib/msun/man/fegetround.3,v 1.2 2005/01/14 09:12:05 ru Exp $
26.\"
27.Dd May 8, 2004
28.Dt FEGETROUND 3
29.Os
30.Sh NAME
31.Nm fegetround ,
32.Nm fesetround
33.Nd floating-point rounding control
34.Sh LIBRARY
35.Lb libm
36.Sh SYNOPSIS
37.In fenv.h
38.Fd "#pragma STDC FENV_ACCESS ON"
39.Ft int
40.Fn fegetround void
41.Ft int
42.Fn fesetround "int round"
43.Sh DESCRIPTION
44The
45.Fn fegetround
46function determines the current floating-point rounding mode,
47and the
48.Fn fesetround
49function sets the current rounding mode to
50.Fa round .
51The rounding mode is one of
52.Dv FE_TONEAREST , FE_DOWNWARD , FE_UPWARD ,
53or
54.Dv FE_TOWARDZERO ,
55as described in
56.Xr fenv 3 .
57.Sh RETURN VALUES
58The
59.Fn fegetround
60routine returns the current rounding mode.
61The
62.Fn fesetround
63function returns 0 on success and non-zero otherwise;
64however, the present implementation always succeeds.
65.Sh SEE ALSO
66.Xr fenv 3 ,
67.Xr fpgetround 3 ,
68.Xr fpsetround 3
69.Sh STANDARDS
70The
71.Fn fegetround
72and
73.Fn fesetround
74functions conform to
75.St -isoC-99 .
76.Sh HISTORY
77These routines first appeared in
78.Fx 5.3 .
79They supersede the non-standard
80.Xr fpgetround 3
81and
82.Xr fpsetround 3
83functions.
84