AMDGPU: Start selecting v_mad_mixlo_f16

Also add some tests that should be able to use v_mad_mixhi_f16,
but do not yet. This is trickier because we don't really model
the partial update of the register done by 16-bit instructions.

llvm-svn: 313806

1 files changed, 9 insertions, 0 deletions

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp b/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
index 3ad19694570..7faf3e123f8 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
@@ -197,6 +197,7 @@ private:
   bool SelectVOP3OpSelMods0(SDValue In, SDValue &Src, SDValue &SrcMods,
                             SDValue &Clamp) const;
   bool SelectVOP3PMadMixModsImpl(SDValue In, SDValue &Src, unsigned &Mods) const;
+  bool SelectVOP3PMadMixMods(SDValue In, SDValue &Src, SDValue &SrcMods) const;
 
   void SelectADD_SUB_I64(SDNode *N);
   void SelectUADDO_USUBO(SDNode *N);
@@ -1990,6 +1991,14 @@ bool AMDGPUDAGToDAGISel::SelectVOP3PMadMixModsImpl(SDValue In, SDValue &Src,
   return false;
 }
 
+bool AMDGPUDAGToDAGISel::SelectVOP3PMadMixMods(SDValue In, SDValue &Src,
+                                               SDValue &SrcMods) const {
+  unsigned Mods = 0;
+  SelectVOP3PMadMixModsImpl(In, Src, Mods);
+  SrcMods = CurDAG->getTargetConstant(Mods, SDLoc(In), MVT::i32);
+  return true;
+}
+
 void AMDGPUDAGToDAGISel::PostprocessISelDAG() {
   const AMDGPUTargetLowering& Lowering =
     *static_cast<const AMDGPUTargetLowering*>(getTargetLowering());