1*2fe8fb19SBen Gras.\" $NetBSD: fpclassify.3,v 1.3 2008/04/30 13:10:50 martin Exp $ 2*2fe8fb19SBen Gras.\" 3*2fe8fb19SBen Gras.\" Copyright (c) 2003 The NetBSD Foundation, Inc. 4*2fe8fb19SBen Gras.\" All rights reserved. 5*2fe8fb19SBen Gras.\" 6*2fe8fb19SBen Gras.\" This code is derived from software contributed to The NetBSD Foundation 7*2fe8fb19SBen Gras.\" by Klaus Klein. 8*2fe8fb19SBen Gras.\" 9*2fe8fb19SBen Gras.\" Redistribution and use in source and binary forms, with or without 10*2fe8fb19SBen Gras.\" modification, are permitted provided that the following conditions 11*2fe8fb19SBen Gras.\" are met: 12*2fe8fb19SBen Gras.\" 1. Redistributions of source code must retain the above copyright 13*2fe8fb19SBen Gras.\" notice, this list of conditions and the following disclaimer. 14*2fe8fb19SBen Gras.\" 2. Redistributions in binary form must reproduce the above copyright 15*2fe8fb19SBen Gras.\" notice, this list of conditions and the following disclaimer in the 16*2fe8fb19SBen Gras.\" documentation and/or other materials provided with the distribution. 17*2fe8fb19SBen Gras.\" 18*2fe8fb19SBen Gras.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19*2fe8fb19SBen Gras.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20*2fe8fb19SBen Gras.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21*2fe8fb19SBen Gras.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22*2fe8fb19SBen Gras.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23*2fe8fb19SBen Gras.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24*2fe8fb19SBen Gras.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25*2fe8fb19SBen Gras.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26*2fe8fb19SBen Gras.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27*2fe8fb19SBen Gras.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28*2fe8fb19SBen Gras.\" POSSIBILITY OF SUCH DAMAGE. 29*2fe8fb19SBen Gras.\" 30*2fe8fb19SBen Gras.Dd January 14, 2004 31*2fe8fb19SBen Gras.Dt FPCLASSIFY 3 32*2fe8fb19SBen Gras.Os 33*2fe8fb19SBen Gras.Sh NAME 34*2fe8fb19SBen Gras.Nm fpclassify 35*2fe8fb19SBen Gras.Nd classify real floating type 36*2fe8fb19SBen Gras.Sh LIBRARY 37*2fe8fb19SBen Gras.Lb libc 38*2fe8fb19SBen Gras.Sh SYNOPSIS 39*2fe8fb19SBen Gras.In math.h 40*2fe8fb19SBen Gras.Ft int 41*2fe8fb19SBen Gras.Fn fpclassify "real-floating x" 42*2fe8fb19SBen Gras.Sh DESCRIPTION 43*2fe8fb19SBen GrasThe 44*2fe8fb19SBen Gras.Fn fpclassify 45*2fe8fb19SBen Grasmacro performs classification of its argument 46*2fe8fb19SBen Gras.Fa x . 47*2fe8fb19SBen GrasAn argument represented in a format wider than its semantic type is 48*2fe8fb19SBen Grasconverted to its semantic type first. 49*2fe8fb19SBen GrasThe classification is then based on the type of the argument. 50*2fe8fb19SBen Gras.Ss IEEE 754 51*2fe8fb19SBen Gras.Bl -tag -width "FP_SUBNORMALXXX" -compact -offset indent 52*2fe8fb19SBen Gras.It Dv FP_INFINITE 53*2fe8fb19SBen Grasinfinity, either positive or negative 54*2fe8fb19SBen Gras.It Dv FP_NAN 55*2fe8fb19SBen Grasnot-a-number 56*2fe8fb19SBen Gras.Pq Dq NaN 57*2fe8fb19SBen Gras.It Dv FP_NORMAL 58*2fe8fb19SBen Grasnormal 59*2fe8fb19SBen Gras.It Dv FP_SUBNORMAL 60*2fe8fb19SBen Grassubnormal 61*2fe8fb19SBen Gras.It Dv FP_ZERO 62*2fe8fb19SBen Graszero 63*2fe8fb19SBen Gras.El 64*2fe8fb19SBen Gras.Ss VAX 65*2fe8fb19SBen Gras.Bl -tag -width "FP_DIRTYZEROXXX" -compact -offset indent 66*2fe8fb19SBen Gras.It Dv FP_ROP 67*2fe8fb19SBen Grasreserved operand 68*2fe8fb19SBen Gras.Pq Dq ROP 69*2fe8fb19SBen Gras.It Dv FP_DIRTYZERO 70*2fe8fb19SBen Grasdirty zero 71*2fe8fb19SBen Gras.It Dv FP_NORMAL 72*2fe8fb19SBen Grasfinite 73*2fe8fb19SBen Gras.It Dv FP_ZERO 74*2fe8fb19SBen Grastrue zero 75*2fe8fb19SBen Gras.El 76*2fe8fb19SBen Gras.Sh RETURN VALUES 77*2fe8fb19SBen GrasThe 78*2fe8fb19SBen Gras.Fn fpclassify 79*2fe8fb19SBen Grasmacro returns the value of the number classification macro appropriate 80*2fe8fb19SBen Grasto its argument 81*2fe8fb19SBen Gras.Fa x 82*2fe8fb19SBen Grasas described above. 83*2fe8fb19SBen Gras.Sh ERRORS 84*2fe8fb19SBen GrasNo errors are defined. 85*2fe8fb19SBen Gras.Sh SEE ALSO 86*2fe8fb19SBen Gras.Xr isfinite 3 , 87*2fe8fb19SBen Gras.Xr isnormal 3 , 88*2fe8fb19SBen Gras.Xr math 3 , 89*2fe8fb19SBen Gras.Xr signbit 3 90*2fe8fb19SBen Gras.Sh STANDARDS 91*2fe8fb19SBen GrasThe 92*2fe8fb19SBen Gras.Fn fpclassify 93*2fe8fb19SBen Grasmacro conforms to 94*2fe8fb19SBen Gras.St -isoC-99 . 95