$NetBSD: fpclassify.3,v 1.2 2004/01/15 19:43:45 kleink Exp $
Copyright (c) 2003 The NetBSD Foundation, Inc.
All rights reserved.
This code is derived from software contributed to The NetBSD Foundation
by Klaus Klein.
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modification, are permitted provided that the following conditions
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THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.Dd January 14, 2004 .Dt FPCLASSIFY 3 .Os .Sh NAME .Nm fpclassify .Nd classify real floating type .Sh LIBRARY .Lb libc .Sh SYNOPSIS n math.h .Ft int .Fn fpclassify "real-floating x" .Sh DESCRIPTION The .Fn fpclassify macro performs classification of its argument .Fa x . An argument represented in a format wider than its semantic type is converted to its semantic type first. The classification is then based on the type of the argument. .Ss IEEE 754 l -tag -width "FP_SUBNORMALXXX" -compact -offset indent t Dv FP_INFINITE infinity, either positive or negative t Dv FP_NAN not-a-number
Copyright (c) 2003 The NetBSD Foundation, Inc.
All rights reserved.
This code is derived from software contributed to The NetBSD Foundation
by Klaus Klein.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
.Dd January 14, 2004 .Dt FPCLASSIFY 3 .Os .Sh NAME .Nm fpclassify .Nd classify real floating type .Sh LIBRARY .Lb libc .Sh SYNOPSIS n math.h .Ft int .Fn fpclassify "real-floating x" .Sh DESCRIPTION The .Fn fpclassify macro performs classification of its argument .Fa x . An argument represented in a format wider than its semantic type is converted to its semantic type first. The classification is then based on the type of the argument. .Ss IEEE 754 l -tag -width "FP_SUBNORMALXXX" -compact -offset indent t Dv FP_INFINITE infinity, either positive or negative t Dv FP_NAN not-a-number
q Dq NaN t Dv FP_NORMAL normal t Dv FP_SUBNORMAL subnormal t Dv FP_ZERO zero .El .Ss VAX l -tag -width "FP_DIRTYZEROXXX" -compact -offset indent t Dv FP_ROP reserved operand
q Dq ROP t Dv FP_DIRTYZERO dirty zero t Dv FP_NORMAL finite t Dv FP_ZERO true zero .El .Sh RETURN VALUES The .Fn fpclassify macro returns the value of the number classification macro appropriate to its argument .Fa x as described above. .Sh ERRORS No errors are defined. .Sh SEE ALSO .Xr isfinite 3 , .Xr isnormal 3 , .Xr math 3 , .Xr signbit 3 .Sh STANDARDS The .Fn fpclassify macro conforms to .St -isoC-99 .