[PATCH] D73588: AMDGPU: Enhancement on FDIV lowering in AMDGPUCodeGenPrepare
Changpeng Fang via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Fri Jan 31 14:26:00 PST 2020
cfang updated this revision to Diff 241807.
cfang added a comment.
update based on comment.
1. 2.5ulp threshold for fdiv.fast, 1.0 ulp for rcp
2. introduce a function lowerUsingFDivFast to use fdiv.fast, this function should be called after lowerUsingRcp because rcp is the prefedrence
This update should clear some confusion.
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D73588/new/
https://reviews.llvm.org/D73588
Files:
llvm/lib/Target/AMDGPU/AMDGPUCodeGenPrepare.cpp
llvm/lib/Target/AMDGPU/SIISelLowering.cpp
llvm/test/CodeGen/AMDGPU/amdgpu-codegenprepare-fdiv.ll
llvm/test/CodeGen/AMDGPU/fdiv.f16.ll
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