ipiq: Add simple IPI latency measure sysctls (2)
[dragonfly.git] / lib / libm / man / fegetround.3
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1.\" Copyright (c) 2004 David Schultz <das@FreeBSD.org>
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6ff43c94 25.\" $FreeBSD: head/lib/msun/man/fegetround.3 140225 2005-01-14 09:12:05Z ru $
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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.