> I don't see how they could. The vector size has increased from XMM to YMM to ZMM, there is obviously no more room for expansion ;-) One thought comes to mind

> I don't see how they could. The vector size has increased from XMM to YMM to ZMM, there is obviously no more room for expansion ;-) One thought comes to mind: WMM, standing for "Wider MM register" But then another one, like they've already done: EXMM, EYMM, EZMM -- as in A, AX, EAX, RAX... (captain obvious: I know it was a joke...) Edit: formatting