[PATCH] D95101: AMDGPU: Use more accurate fast f64 fdiv

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: rampitec, b-sumner.
Herald added subscribers: kerbowa, hiraditya, t-tye, tpr, dstuttard, yaxunl, nhaehnle, jvesely, kzhuravl.
arsenm requested review of this revision.
Herald added a subscriber: wdng.
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A raw v_rcp_f64 isn't accurate enough, so start applying correction.


https://reviews.llvm.org/D95101

Files:
  llvm/lib/Target/AMDGPU/AMDGPUCodeGenPrepare.cpp
  llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
  llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.h
  llvm/lib/Target/AMDGPU/SIISelLowering.cpp
  llvm/lib/Target/AMDGPU/SIISelLowering.h
  llvm/lib/Target/AMDGPU/SIInstructions.td
  llvm/test/CodeGen/AMDGPU/GlobalISel/fdiv.f64.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/frem.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-fdiv.mir
  llvm/test/CodeGen/AMDGPU/fdiv.f64.ll
  llvm/test/CodeGen/AMDGPU/frem.ll
  llvm/test/CodeGen/AMDGPU/llvm.amdgcn.rcp.ll
  llvm/test/CodeGen/AMDGPU/rsq.ll

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