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| author | Tom Stellard <thomas.stellard@amd.com> | 2016-12-07 02:42:15 +0000 |
|---|---|---|
| committer | Tom Stellard <thomas.stellard@amd.com> | 2016-12-07 02:42:15 +0000 |
| commit | 8485fa096e0baf95790a8b1ba7f8ea8806f50a3e (patch) | |
| tree | 4571875722107bcf446cf548964cfc23a39b08e7 /llvm/lib/Target/AMDGPU/SIFoldOperands.cpp | |
| parent | 2f50fef095298706e7dbe1f47b7d9421c74a790b (diff) | |
| download | bcm5719-llvm-8485fa096e0baf95790a8b1ba7f8ea8806f50a3e.tar.gz bcm5719-llvm-8485fa096e0baf95790a8b1ba7f8ea8806f50a3e.zip | |
AMDGPU : Add S_SETREG instructions to fix fdiv precision issues.
Patch By: Wei Ding
Summary: This patch fixes the fdiv precision issues.
Reviewers: b-sumner, cfang, wdng, arsenm
Subscribers: kzhuravl, nhaehnle, yaxunl, tony-tye
Differential Revision: https://reviews.llvm.org/D26424
llvm-svn: 288879
Diffstat (limited to 'llvm/lib/Target/AMDGPU/SIFoldOperands.cpp')
| -rw-r--r-- | llvm/lib/Target/AMDGPU/SIFoldOperands.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/llvm/lib/Target/AMDGPU/SIFoldOperands.cpp b/llvm/lib/Target/AMDGPU/SIFoldOperands.cpp index 7bf6ec22469..3d59f8d82ae 100644 --- a/llvm/lib/Target/AMDGPU/SIFoldOperands.cpp +++ b/llvm/lib/Target/AMDGPU/SIFoldOperands.cpp @@ -173,6 +173,13 @@ static bool tryAddToFoldList(std::vector<FoldCandidate> &FoldList, MI->setDesc(TII->get(Opc)); } + // Special case for s_setreg_b32 + if (Opc == AMDGPU::S_SETREG_B32 && OpToFold->isImm()) { + MI->setDesc(TII->get(AMDGPU::S_SETREG_IMM32_B32)); + FoldList.push_back(FoldCandidate(MI, OpNo, OpToFold)); + return true; + } + // If we are already folding into another operand of MI, then // we can't commute the instruction, otherwise we risk making the // other fold illegal. |
