Mill Computing, Inc. › Forums › The Mill › Architecture › Execution › Reply To: Execution

Renesac
Participant
February 1, 2015 at 11:45 am
Post count: 6
#1681

Right, I was confounded by your slide 28. It shows the con being moved to the brtr cycle. Apparently this is wrong. The add that should be moved up to the brtr cycle, and the con should be moved even higher to the cycle before, and both will not appear to have executed if the branch wasn’t taken. And the store is in the same cycle as the following branch (writterPhase) not moved lower.

Now I see that the reader phase is really advantageous in all situations (except some times for exit mispredictions, as any other pipeline lengthening, but that is ok).