[PATCH] D153022: AMDGPU: Use correct lowering for llvm.log2.f32
Matt Arsenault via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Thu Jun 15 06:59:44 PDT 2023
arsenm created this revision.
arsenm added reviewers: AMDGPU, foad, jhuber6, rampitec, Pierre-vh, cdevadas.
Herald added subscribers: StephenFan, jdoerfert, kerbowa, hiraditya, tpr, dstuttard, yaxunl, jvesely, kzhuravl.
Herald added a project: All.
arsenm requested review of this revision.
Herald added a subscriber: wdng.
Herald added a project: LLVM.
We previously directly codegened to v_log_f32, which is broken for
denormals. The lowering isn't complicated, you simply need to scale
denormal inputs and adjust the result. Note log and log10 are still
not accurate enough, and will be fixed separately.
https://reviews.llvm.org/D153022
Files:
llvm/docs/AMDGPUUsage.rst
llvm/docs/LangRef.rst
llvm/docs/ReleaseNotes.rst
llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
llvm/lib/Target/AMDGPU/AMDGPUISelLowering.h
llvm/lib/Target/AMDGPU/AMDGPUInstrInfo.td
llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.h
llvm/lib/Target/AMDGPU/SIISelLowering.cpp
llvm/test/CodeGen/AMDGPU/GlobalISel/fpow.ll
llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-flog.mir
llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-flog10.mir
llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-flog2.mir
llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-fpow.mir
llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-fpowi.mir
llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.powi.ll
llvm/test/CodeGen/AMDGPU/llvm.log.ll
llvm/test/CodeGen/AMDGPU/llvm.log10.ll
llvm/test/CodeGen/AMDGPU/llvm.log2.ll
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