ipiq: Add simple IPI latency measure sysctls (2)
[dragonfly.git] / lib / libm / man / nextafter.3
CommitLineData
8cecb502 1.\" Copyright (c) 1985, 1991 Regents of the University of California.
74dfd0cf
JM
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
10.\" notice, this list of conditions and the following disclaimer in the
11.\" documentation and/or other materials provided with the distribution.
dc71b7ab 12.\" 3. Neither the name of the University nor the names of its contributors
8cecb502
JM
13.\" may be used to endorse or promote products derived from this software
14.\" without specific prior written permission.
15.\"
16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26.\" SUCH DAMAGE.
74dfd0cf 27.\"
8cecb502 28.\" from: @(#)ieee.3 6.4 (Berkeley) 5/6/91
6ff43c94 29.\" $FreeBSD: head/lib/msun/man/nextafter.3 165906 2007-01-09 01:02:06Z imp $
74dfd0cf 30.\"
8cecb502 31.Dd December 21, 2011
74dfd0cf
JM
32.Dt NEXTAFTER 3
33.Os
34.Sh NAME
35.Nm nextafter ,
36.Nm nextafterf ,
37.Nm nextafterl ,
8cecb502 38.Nm nexttoward ,
6ff43c94
PA
39.Nm nexttowardf ,
40.Nm nexttowardl
8cecb502 41.Nd next representable value
74dfd0cf
JM
42.Sh LIBRARY
43.Lb libm
44.Sh SYNOPSIS
45.In math.h
46.Ft double
47.Fn nextafter "double x" "double y"
48.Ft float
49.Fn nextafterf "float x" "float y"
50.Ft long double
51.Fn nextafterl "long double x" "long double y"
52.Ft double
53.Fn nexttoward "double x" "long double y"
8cecb502
JM
54.Ft float
55.Fn nexttowardf "float x" "long double y"
6ff43c94
PA
56.Ft long double
57.Fn nexttowardl "long double x" "long double y"
74dfd0cf 58.Sh DESCRIPTION
8cecb502
JM
59These functions
60return the next machine representable number from
74dfd0cf 61.Fa x
8cecb502 62in direction
74dfd0cf 63.Fa y .
74dfd0cf 64.Sh SEE ALSO
6ff43c94 65.Xr ieee 3 ,
74dfd0cf
JM
66.Xr math 3
67.Sh STANDARDS
8cecb502
JM
68The
69.Fn nextafter ,
70.Fn nextafterf ,
71.Fn nextafterl ,
72.Fn nexttoward ,
6ff43c94 73.Fn nexttowardf ,
8cecb502 74and
6ff43c94 75.Fn nexttowardl
8cecb502 76routines conform to
74dfd0cf 77.St -isoC-99 .
8cecb502
JM
78They implement the Nextafter function recommended by
79.St -ieee754 ,
80with the extension that
81.Fn nextafter +0.0, -0.0
82returns
83.Li -0.0 ,
84and
85.Fn nextafter -0.0, +0.0
86returns
87.Li +0.0 .
88.Sh HISTORY
89The
90.Fn nextafter
91function appeared in
92.Bx 4.3 ,
93and
94.Fn nextafterf
95appeared in
96.Fx 2.0 .