isnan.c File Reference

#include <precomp.h>

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Functions
int CDECL	_isnan (double __x)
int CDECL	_finite (double __x)

Function Documentation

_finite()

int CDECL _finite

(

double

__x

)

Definition at line 43 of file isnan.c.

{
    union
    {
        double*   __x;
        double_s*   x;
    } x;
 
    x.__x = &__x;
 
    return ((x.x->exponent & 0x7ff) != 0x7ff);
}

_isnan()

int CDECL _isnan

(

double

__x

)

Definition at line 29 of file isnan.c.

{
    union
    {
        double*   __x;
        double_s*   x;
    } x;
        x.__x = &__x;
    return ( x.x->exponent == 0x7ff  && ( x.x->mantissah != 0 || x.x->mantissal != 0 ));
}