None of those processors had anything like this. The innovation of the UWM paper was the MDPT and DDST, then due to practical manufacture reasons merging them,

None of those processors had anything like this. The innovation of the UWM paper was the MDPT and DDST, then due to practical manufacture reasons merging them, and then studying the trade-off with a simulator to arrive at a very efficient system. For comparison, here is the IBM patent for the bigger more expensive approach used in Power4: http://www.google.com/patents/US5615350 http://www.google.com/patents/US5615350