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NetBSD 6.1.5 - man page for isnormal (netbsd section 3)

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ISNORMAL(3)			   BSD Library Functions Manual 		      ISNORMAL(3)

NAME
     isnormal -- test for normal value

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <math.h>

     int
     isnormal(real-floating x);

DESCRIPTION
     The isnormal() macro determines whether its argument x has a normal value.  An argument rep-
     resented in a format wider than its semantic type is converted to its semantic type first.
     The determination is then based on the type of the argument.

   IEEE 754
     It is determined whether the value of x is normal, and neither zero, subnormal, infinite nor
     NaN.

   VAX
     It is determined whether the value of x is finite, and neither true zero, dirty zero nor
     ROP.

RETURN VALUES
     The isnormal() macro returns a non-zero value if the value of x is finite.  Otherwise 0 is
     returned.

ERRORS
     No errors are defined.

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

STANDARDS
     The isnormal() macro conforms to ISO/IEC 9899:1999 (``ISO C99'').

BSD					 October 29, 2003				      BSD
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