Thread

1. juancn · 1789735363 · focus · HN ↗

   Apparently it only happens on P-cores, recent E-cores have a fast path for subnormals.

   1. rustybolt · 1789737974 · focus · HN ↗

      That seems weird. They did throw extra hardware at it to speed it up for the efficient cores, but not for the performance cores?

      1. cwzwarich · 1789740129 · focus · HN ↗

         Probably different teams. Plus you can not underestimate the role that momentum plays in semiconductor engineering teams. If some respected person determined that subnormals are either Hard (tm) or not a Real Problem (tm), it will take a long time to correct this mistaken belief. I believe there have been some recent academic papers on FP implementation from the Intel E-Core team, which is a sign that they are a bit more with the times.

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