Register renaming is implemented in hardware. Because it is used on every instruction it is on the critical path and is probably hand-optimized. Here is some mo

Register renaming is implemented in hardware. Because it is used on every instruction it is on the critical path and is probably hand-optimized. Here is some more reading on this topic: https://en.wikipedia.org/wiki/Register_renaming https://en.wikipedia.org/wiki/Register_renaming