_fdclass.c File Reference

#include <math.h>
#include <stdint.h>

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Functions
_Check_return_ short __cdecl	_fdclass (_In_ float _X)

Function Documentation

_fdclass()

_Check_return_ short __cdecl _fdclass

(

_In_ float

_X

)

Definition at line 30 of file _fdclass.c.

{
    union { float f; uint32_t ui32; } u = { _X };
    uint32_t e = u.ui32 & 0x7F800000u;
    uint32_t m = u.ui32 & 0x007FFFFFu;
 
    if (e == 0x7F800000u)
    {
        return m ? FP_NAN : FP_INFINITE;
    }
    else if (e == 0)
    {
        return m ? FP_SUBNORMAL : FP_ZERO;
    }
    else
    {
        return FP_NORMAL;
    }
}

Referenced by _fdtest().