[all-commits] [llvm/llvm-project] e84770: [X86][SLM] Fix BSR/BSF port usage

Simon Pilgrim via All-commits all-commits at lists.llvm.org
Mon Oct 4 11:53:15 PDT 2021


  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e8477045f6d8229a60f6d10c984ee84a3b05efdf
      https://github.com/llvm/llvm-project/commit/e8477045f6d8229a60f6d10c984ee84a3b05efdf
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2021-10-04 (Mon, 04 Oct 2021)

  Changed paths:
    M llvm/lib/Target/X86/X86ScheduleSLM.td

  Log Message:
  -----------
  [X86][SLM] Fix BSR/BSF port usage

Both ports are required for BitScan ops. Update the port usage and distributed throughput based off the most recent llvm-exegesis captures (PR36895) and what Intel AoM / Agner reports as well.




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