I was wondering whether it was possible to overlap instructions the the single and double precision FPUs as it is possible for the SP FPU and the special function unit. At least the later I remember from a talk by Patrick LeGresley.
I have quite some DP additions to do where the emulation accuracy would suffice and it would be a pitty to have those SP FPUs staying around doing nothing. Sadly in my measurements it looks like I cannot utilize DP and SP FPUs at the same time, but I still have the hope someone else figured out how to do it. Any success stories?