+ bool hasChain = false;
+ unsigned hiOpc = Op.getOpcode();
+ switch (Op.getOpcode()) {
+ default: llvm_unreachable("Invalid opcode");
+ case ISD::ADDC: hiOpc = ISD::ADDE; break;
+ case ISD::ADDE: hasChain = true; break;
+ case ISD::SUBC: hiOpc = ISD::SUBE; break;
+ case ISD::SUBE: hasChain = true; break;
+ }
+ SDValue Lo;
+ SDVTList VTs = DAG.getVTList(MVT::i32, MVT::Glue);
+ if (hasChain) {
+ Lo = DAG.getNode(Op.getOpcode(), dl, VTs, Src1Lo, Src2Lo,
+ Op.getOperand(2));
+ } else {
+ Lo = DAG.getNode(Op.getOpcode(), dl, VTs, Src1Lo, Src2Lo);
+ }
+ SDValue Hi = DAG.getNode(hiOpc, dl, VTs, Src1Hi, Src2Hi, Lo.getValue(1));
+ SDValue Carry = Hi.getValue(1);
+
+ Lo = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i64, Lo);
+ Hi = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i64, Hi);
+ Hi = DAG.getNode(ISD::SHL, dl, MVT::i64, Hi,
+ DAG.getConstant(32, MVT::i64));
+
+ SDValue Dst = DAG.getNode(ISD::OR, dl, MVT::i64, Hi, Lo);
+ SDValue Ops[2] = { Dst, Carry };
+ return DAG.getMergeValues(Ops, 2, dl);
+}