Improve Galois field implementation
Improve Galois field implementation

cshung/MiscLab,cshung/MiscLab,cshung/MiscLab,cshung/MiscLab,cshung/MiscLab,cshung/MiscLab,cshung/MiscLab,cshung/MiscLab,cshung/MiscLab,cshung/MiscLab