Make default expansion for FP16 <-> FP32 nodes into libcalls

llvm-svn: 98501

1 files changed, 8 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index a3175e8a82b..b5af2c134d3 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -851,6 +851,8 @@ SDValue SelectionDAGLegalize::LegalizeOp(SDValue Op) {
   case ISD::MERGE_VALUES:
   case ISD::EH_RETURN:
   case ISD::FRAME_TO_ARGS_OFFSET:
+  case ISD::FP16_TO_FP32:
+  case ISD::FP32_TO_FP16:
     // These operations lie about being legal: when they claim to be legal,
     // they should actually be expanded.
     Action = TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0));
@@ -2636,6 +2638,12 @@ void SelectionDAGLegalize::ExpandNode(SDNode *Node,
     Results.push_back(ExpandFPLibCall(Node, RTLIB::REM_F32, RTLIB::REM_F64,
                                       RTLIB::REM_F80, RTLIB::REM_PPCF128));
     break;
+  case ISD::FP16_TO_FP32:
+    Results.push_back(ExpandLibCall(RTLIB::FPEXT_F16_F32, Node, false));
+    break;
+  case ISD::FP32_TO_FP16:
+    Results.push_back(ExpandLibCall(RTLIB::FPROUND_F32_F16, Node, false));
+    break;
   case ISD::ConstantFP: {
     ConstantFPSDNode *CFP = cast<ConstantFPSDNode>(Node);
     // Check to see if this FP immediate is already legal.