netbsd man page for fpclassify

FPCLASSIFY(3)						   BSD Library Functions Manual 					     FPCLASSIFY(3)

NAME
     fpclassify -- classify real floating type

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <math.h>

     int
     fpclassify(real-floating x);

DESCRIPTION
     The fpclassify() macro performs classification of its argument x.	An argument represented in a format wider than its semantic type is con-
     verted 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'').

BSD
								 January 14, 2004							       BSD