void
NVTest()
PREINIT:
    double d1;
    double d2;
    unsigned __int64 i64;
    unsigned __int64 i642;
PPCODE:
    d1 = pow(2.0, 56.0);
    d1 *= 128.0;
    i64 = 0xFF00000000000000;
    _controlfp( _EM_INEXACT , _MCW_EM);
    i642 = (unsigned __int64)d1;
    d2 = (double)i64;
    0;