fpclassify man page on MirBSD

fpclassify man page on MirBSD

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FPCLASSIFY(3)		   BSD Programmer's Manual		 FPCLASSIFY(3)

NAME
     fpclassify - classify real floating type

LIBRARY
     libc

SYNOPSIS
     #include <math.h>

     int
     fpclassify(real-floating x);

DESCRIPTION
     The fpclassify() macro performs classification of its argument x. An ar-
     gument 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.

  IEEE 754
	   FP_INFINITE	    infinity, either positive or negative
	   FP_NAN	    not-a-number ("NaN")
	   FP_NORMAL	    normal
	   FP_SUBNORMAL	    subnormal
	   FP_ZERO	    zero

  VAX
	   FP_ROP	    reserved operand ("ROP")
	   FP_DIRTYZERO	    dirty zero
	   FP_NORMAL	    finite
	   FP_ZERO	    true zero

RETURN VALUES
     The fpclassify() macro returns the value of the number classification
     macro appropriate to its argument x as described above.

ERRORS
     No errors are defined.

SEE ALSO
     isfinite(3), isnormal(3), math(3), signbit(3)

STANDARDS
     The fpclassify() macro conforms to ISO/IEC 9899:1999 ("ISO C99").

MirOS BSD #10-current	       January 14, 2004				     1

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