[all-commits] [llvm/llvm-project] ded886: [X86][Atom] Fix vector fp<->int resource/throughputs

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ded8866f4a4600c69f3d1d6f5e0c9ec7bd9ade45
      https://github.com/llvm/llvm-project/commit/ded8866f4a4600c69f3d1d6f5e0c9ec7bd9ade45
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2021-07-07 (Wed, 07 Jul 2021)

  Changed paths:
    M llvm/lib/Target/X86/X86ScheduleAtom.td
    M llvm/test/tools/llvm-mca/X86/Atom/resources-sse1.s
    M llvm/test/tools/llvm-mca/X86/Atom/resources-sse2.s

  Log Message:
  -----------
  [X86][Atom] Fix vector fp<->int resource/throughputs

Match whats documented in the Intel AOM - almost all the conversion instructions requires BOTH ports (apart from the MMX cvtpi2ps/cvtpi2ps instructions which we already override) - this was being incorrectly modelled as EITHER port.

Now that we can use in-order models in llvm-mca, the atom model is a good "worst case scenario" analysis for x86.