Notes for ROTG, ROTMG, ROT, ROTM

1. ROTG is essentially a scalar routine, so I didn't feel it was worth optimizing beyond just not writing it in a non-braindead way in the first place.

2. As for the rest of the routines, OK, so I haven't supported speeding up any of them yet, sue me. I myself don't use'em, and I couldn't write the testers without scoping the code, so they got a pass. Let me know if you call these guys, maybe I'll get off my duff . . .