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Old 05-12-2006, 07:55 PM
Luke
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Default Re: Multiple Write Port Register Files

Yeah, I looked into using that. It actually gets pretty expensive,
seems to have an exponential cost related to the number of write ports
for the XOR scheme. It is a very interesting solution though.

I have a multiple-port reorder buffer that uses partitioning to
implement multiple ports, which is very efficient. The reorder buffer
writes up to four entries at a time into the register file. So I'll
just use time-multiplexing for the register file and hide the extra
cycle of latency it takes to update the register file by keeping the
data in the reorder buffer an extra cycle.

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