[PATCH] D66050: Improve division estimation of floating points.

[Sanjay Patel via Phabricator via llvm-commits]

spatel added a subscriber: scanon.
spatel added a comment.

x86 is moving away from reciprocal estimate code because recent hardware implements a real fdiv at about the same speed as reciprocal estimate+refinement. So x86 perf probably isn't that big of a concern, but it would be good to see the regression test diffs (use the auto-generation script to update those files).

I don't have a good sense of the accuracy gains/trade-offs from pulling the numerator into the estimate calc. Ping @scanon for better insight/data on that.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D66050/new/

https://reviews.llvm.org/D66050