[libc-commits] [PATCH] D122346: [libc] Improve the performance of exp2f.

[Paul Zimmermann via Phabricator via libc-commits]

zimmermann6 accepted this revision.
zimmermann6 added a comment.

I confirm the results are still correctly rounded for all four rounding modes. For rounding to nearest the reciprocal throughput/latency decreased from 56/103.5 cycles to 26.6/76.0 cycles on a Core i5-4590.
As a comparison, the core-math code runs in 21.2/63.2 cycles.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D122346/new/

https://reviews.llvm.org/D122346