xref: /freebsd/lib/msun/man/nextafter.3 (revision 29bf6af8904f9833bbc9c0e5f2219f785defe550)

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.\"     from: @(#)ieee.3	6.4 (Berkeley) 5/6/91
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.Dd January 26, 2005
.Dt NEXTAFTER 3
.Os
.Sh NAME
.Nm nextafter ,
.Nm nextafterf
.Nd next representable value
.Sh LIBRARY
.Lb libm
.Sh SYNOPSIS
.In math.h
.Ft double
.Fn nextafter "double x" "double y"
.Ft float
.Fn nextafterf "float x" "float y"
.Sh DESCRIPTION
.Fn nextafter
and
.Fn nextafterf
return the next machine representable number from
.Fa x
in direction
.Fa y .
.Sh SEE ALSO
.Xr ieee 3 ,
.Xr math 3
.Sh STANDARDS
The
.Fn nextafter
and
.Fn nextafterf
routines conform to
.St -isoC-99 .
They implement the Nextafter function recommended by
.St -ieee754 ,
with the extension that
.Fn nextafter +0.0, -0.0
returns
.Li -0.0 ,
and
.Fn nextafter -0.0, +0.0
returns
.Li +0.0 .
.Sh HISTORY
The
.Fn nextafter
function appeared in
.Bx 4.3 ,
and
.Fn nextafterf
appeared in
.Fx 2.0 .