Ease, please be clear about where we lost the instruction group definition. If you are referring to the right justification, I'm not sure that, in and of itself, is a major problem. If you look at ARM architecture, it is obvious they are circumventing the 584 patent by allowing the opposite alignment. The rule of eqivalents would surely come into play if/when we go after ARM. But if it is something else, then I missed it. Opty