__fpclassifyld

Syntax

#include <math.h> int __fpclassifyld(long double);

Description

Returns the kind of the floating point value supplied. You should use the type generic macro fpclassify (see section fpclassify) instead of this function.

Return Value

FP_INFINITE, FP_NAN, FP_NORMAL, FP_SUBNORMAL, FP_ZERO or FP_UNNORMAL.

Portability

ANSI/ISO C

C99; not C89

Example

if( __fpclassifyld(0.0L) != FP_ZERO ) { printf("Something is wrong with the implementation!\n"); }