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I see, there are indeed solutions like regfile duplication to handle large port number but it's expensive when physical regfile becomes large. I still think tha
by avianes 5y ago
I see, there are indeed solutions like regfile duplication to handle large port number but it's expensive when physical regfile becomes large. I still think that the uarch's job is to ensure minimal implementation cost ;).
Thank you for your opinion and thought process, it's very valuable !
- Taniwha 5y agoI 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