d1u8va1    d1u8vb1    d1u8vc1    d1u8vd1 
d1u8va1           0.0        0.0        0.0        0.0 
d1u8vb1           0.0        0.0        0.0        0.0 
d1u8vc1           0.0        0.0        0.0        0.0 
d1u8vd1           0.0        0.0        0.0        0.0