[PATCH] D118534: [X86] Introduce more common modern tunings into `generic`

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added a comment.

Please split Znver changes into a separate review.
At least for znver3, i'm not really confident that `fsqrt` is fast,
https://www.agner.org/optimize/instruction_tables.pdf says ~25cy,
while NR takes ~21cy: https://godbolt.org/z/ax4e7zsjn


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D118534/new/

https://reviews.llvm.org/D118534