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by BeeOnRope 2752 days ago
I just ran some tests on CNL and indeed the behavior is very different than earlier chips. I am seeing ~15 cycle divs with no pipelining (i.e,. the latency and inverse throughput are both 15), versus 36+ cycles latency and 25+ cycles inv throughput on Skylake.

Interesting. I found only a few other changes beyond that, so far.

1 comments

CNL also added another AES unit, so you can now dispatch aesenc and its ilk to ports 0 and 1.