Document nearbyint, nearbyintf, nearbyintl.

1 files changed, 26 insertions, 12 deletions

diff --git a/lib/libm/man/rint.3 b/lib/libm/man/rint.3
index dea7ed6b16c..caefb072cf7 100644
--- a/lib/libm/man/rint.3
+++ b/lib/libm/man/rint.3
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: rint.3,v 1.10 2009/08/03 21:26:07 martynas Exp $
+.\"	$OpenBSD: rint.3,v 1.11 2011/05/25 22:19:25 martynas Exp $
 .\" Copyright (c) 1985, 1991 Regents of the University of California.
 .\" All rights reserved.
 .\"
@@ -28,10 +28,13 @@
 .\"
 .\"     from: @(#)rint.3	5.1 (Berkeley) 5/2/91
 .\"
-.Dd $Mdocdate: August 3 2009 $
+.Dd $Mdocdate: May 25 2011 $
 .Dt RINT 3
 .Os
 .Sh NAME
+.Nm nearbyint ,
+.Nm nearbyintf ,
+.Nm nearbyintl ,
 .Nm rint ,
 .Nm rintf ,
 .Nm rintl
@@ -39,6 +42,12 @@
 .Sh SYNOPSIS
 .Fd #include <math.h>
 .Ft double
+.Fn nearbyint "double x"
+.Ft float
+.Fn nearbyintf "float x"
+.Ft long double
+.Fn nearbyintl "long double x"
+.Ft double
 .Fn rint "double x"
 .Ft float
 .Fn rintf "float x"
@@ -46,19 +55,24 @@
 .Fn rintl "long double x"
 .Sh DESCRIPTION
 The
-.Fn rint
-function returns the integral value (represented as a double precision number)
-nearest to
+.Fn rint ,
+.Fn rintf ,
+and
+.Fn rintl
+functions return the integral value nearest to
 .Fa x
 according to the prevailing rounding mode.
+.Pp
 The
-.Fn rintf
-function is a single precision version of
-.Fn rint .
-The
-.Fn rintl
-function is an extended precision version of
-.Fn rint .
+.Fn nearbyint ,
+.Fn nearbyintf ,
+and
+.Fn nearbyintl
+functions return the integral value nearest to
+.Fa x
+according to the prevailing rounding mode, and without raising the
+.Dq inexact
+floating-point exception.
 .Sh SEE ALSO
 .Xr abs 3 ,
 .Xr ceil 3 ,