[all-commits] [llvm/llvm-project] c8f0d2: [AMDGPU] Fix the gfx10 scheduling model for f32 co...

[jayfoad via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: c8f0d27ef37cf9f6a808b5830c9bdc5686cc5bc4
      https://github.com/llvm/llvm-project/commit/c8f0d27ef37cf9f6a808b5830c9bdc5686cc5bc4
  Author: Jay Foad <jay.foad at amd.com>
  Date:   2020-03-10 (Tue, 10 Mar 2020)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SISchedule.td
    M llvm/lib/Target/AMDGPU/VOP1Instructions.td

  Log Message:
  -----------
  [AMDGPU] Fix the gfx10 scheduling model for f32 conversions

Summary:
As far as I can tell on gfx10 conversions to/from f32 (that are not
converting f32 to/from f64) are full rate instructions, but they were
marked as quarter rate instructions.

I have fixed this for gfx10 only. I assume the scheduling model was
correct for older architectures, though I don't have any documentation
handy to confirm that.

Reviewers: rampitec, arsenm

Subscribers: kzhuravl, jvesely, wdng, nhaehnle, yaxunl, dstuttard, tpr, t-tye, hiraditya, kerbowa, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D75392