diff options
| -rw-r--r-- | lib/Target/Alpha/AlphaISelLowering.cpp | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/lib/Target/Alpha/AlphaISelLowering.cpp b/lib/Target/Alpha/AlphaISelLowering.cpp index e11ed7c..0c50567 100644 --- a/lib/Target/Alpha/AlphaISelLowering.cpp +++ b/lib/Target/Alpha/AlphaISelLowering.cpp @@ -107,7 +107,7 @@ AlphaTargetLowering::AlphaTargetLowering(TargetMachine &TM) setOperationAction(ISD::UMUL_LOHI, MVT::i64, Expand); setOperationAction(ISD::SMUL_LOHI, MVT::i64, Expand); - setOperationAction(ISD::SRL_PARTS, MVT::i64, Expand); + setOperationAction(ISD::SRL_PARTS, MVT::i64, Custom); setOperationAction(ISD::SRA_PARTS, MVT::i64, Expand); setOperationAction(ISD::SHL_PARTS, MVT::i64, Expand); @@ -578,6 +578,35 @@ SDValue AlphaTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) { } } + case ISD::SRL_PARTS: { + SDValue ShOpLo = Op.getOperand(0); + SDValue ShOpHi = Op.getOperand(1); + SDValue ShAmt = Op.getOperand(2); + SDValue bm = DAG.getNode(ISD::SUB, dl, MVT::i64, + DAG.getConstant(64, MVT::i64), ShAmt); + SDValue BMCC = DAG.getSetCC(dl, MVT::i64, bm, + DAG.getConstant(0, MVT::i64), ISD::SETLE); + // if 64 - shAmt <= 0 + SDValue Hi_Neg = DAG.getConstant(0, MVT::i64); + SDValue ShAmt_Neg = DAG.getNode(ISD::SUB, dl, MVT::i64, + DAG.getConstant(0, MVT::i64), bm); + SDValue Lo_Neg = DAG.getNode(ISD::SRL, dl, MVT::i64, ShOpHi, ShAmt_Neg); + // else + SDValue carries = DAG.getNode(ISD::SHL, dl, MVT::i64, ShOpHi, bm); + SDValue Hi_Pos = DAG.getNode(ISD::SRL, dl, MVT::i64, ShOpHi, ShAmt); + SDValue Lo_Pos = DAG.getNode(ISD::SRL, dl, MVT::i64, ShOpLo, ShAmt); + Lo_Pos = DAG.getNode(ISD::OR, dl, MVT::i64, Lo_Pos, carries); + // Merge + SDValue Hi = DAG.getNode(ISD::SELECT, dl, MVT::i64, BMCC, Hi_Neg, Hi_Pos); + SDValue Lo = DAG.getNode(ISD::SELECT, dl, MVT::i64, BMCC, Lo_Neg, Lo_Pos); + SDValue Ops[2] = { Lo, Hi }; + return DAG.getMergeValues(Ops, 2, dl); + } + // case ISD::SRA_PARTS: + + // case ISD::SHL_PARTS: + + case ISD::SINT_TO_FP: { assert(Op.getOperand(0).getValueType() == MVT::i64 && "Unhandled SINT_TO_FP type in custom expander!"); |