I think that one has to separate out architecture and implementation a bit, they're obviously a deeply intertwingled dance - but you have to start with the arch

I think that one has to separate out architecture and implementation a bit, they're obviously a deeply intertwingled dance - but you have to start with the architecture and tweak from there to get the best result in the end - I'm probably halfway through that process now, starting to introduce deeper timing constraints to flesh out that stuff BTW once great thing that sort of falls out of this architecture is that the commit register file gets shared between the integer and FP registers (and probably vector registers too), and duping just that may be an interesting architectural way to go