diff options
| author | Dimitry Andric <dim@FreeBSD.org> | 2020-07-26 19:36:28 +0000 |
|---|---|---|
| committer | Dimitry Andric <dim@FreeBSD.org> | 2020-07-26 19:36:28 +0000 |
| commit | cfca06d7963fa0909f90483b42a6d7d194d01e08 (patch) | |
| tree | 209fb2a2d68f8f277793fc8df46c753d31bc853b /llvm/lib/Target/AMDGPU/AMDGPUGlobalISelUtils.cpp | |
| parent | 706b4fc47bbc608932d3b491ae19a3b9cde9497b (diff) | |
Notes
Diffstat (limited to 'llvm/lib/Target/AMDGPU/AMDGPUGlobalISelUtils.cpp')
| -rw-r--r-- | llvm/lib/Target/AMDGPU/AMDGPUGlobalISelUtils.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUGlobalISelUtils.cpp b/llvm/lib/Target/AMDGPU/AMDGPUGlobalISelUtils.cpp index 16d7f2c4f9e59..989937a597fb2 100644 --- a/llvm/lib/Target/AMDGPU/AMDGPUGlobalISelUtils.cpp +++ b/llvm/lib/Target/AMDGPU/AMDGPUGlobalISelUtils.cpp @@ -43,3 +43,12 @@ AMDGPU::getBaseWithConstantOffset(MachineRegisterInfo &MRI, Register Reg) { return std::make_tuple(Reg, 0, Def); } + +bool AMDGPU::isLegalVOP3PShuffleMask(ArrayRef<int> Mask) { + assert(Mask.size() == 2); + + // If one half is undef, the other is trivially in the same reg. + if (Mask[0] == -1 || Mask[1] == -1) + return true; + return (Mask[0] & 2) == (Mask[1] & 2); +} |