diff options
Diffstat (limited to 'llvm/lib/Target/Mips/MipsISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/Mips/MipsISelLowering.cpp | 59 |
1 files changed, 57 insertions, 2 deletions
diff --git a/llvm/lib/Target/Mips/MipsISelLowering.cpp b/llvm/lib/Target/Mips/MipsISelLowering.cpp index e71bc78a611..42a35ad1b5a 100644 --- a/llvm/lib/Target/Mips/MipsISelLowering.cpp +++ b/llvm/lib/Target/Mips/MipsISelLowering.cpp @@ -128,8 +128,8 @@ MipsTargetLowering(MipsTargetMachine &TM) setOperationAction(ISD::SHL_PARTS, MVT::i32, Expand); setOperationAction(ISD::SRA_PARTS, MVT::i32, Expand); setOperationAction(ISD::SRL_PARTS, MVT::i32, Expand); - setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand); - setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand); + setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom); + setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom); setOperationAction(ISD::FSIN, MVT::f32, Expand); setOperationAction(ISD::FSIN, MVT::f64, Expand); setOperationAction(ISD::FCOS, MVT::f32, Expand); @@ -515,6 +515,7 @@ LowerOperation(SDValue Op, SelectionDAG &DAG) const case ISD::JumpTable: return LowerJumpTable(Op, DAG); case ISD::SELECT: return LowerSELECT(Op, DAG); case ISD::VASTART: return LowerVASTART(Op, DAG); + case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG); } return SDValue(); } @@ -943,6 +944,60 @@ SDValue MipsTargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) const { false, false, 0); } +static SDValue LowerFCOPYSIGN32(SDValue Op, SelectionDAG &DAG) { + // FIXME: Use ext/ins instructions if target architecture is Mips32r2. + DebugLoc dl = Op.getDebugLoc(); + SDValue Op0 = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Op.getOperand(0)); + SDValue Op1 = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Op.getOperand(1)); + SDValue And0 = DAG.getNode(ISD::AND, dl, MVT::i32, Op0, + DAG.getConstant(0x7fffffff, MVT::i32)); + SDValue And1 = DAG.getNode(ISD::AND, dl, MVT::i32, Op1, + DAG.getConstant(0x80000000, MVT::i32)); + SDValue Result = DAG.getNode(ISD::OR, dl, MVT::i32, And0, And1); + return DAG.getNode(ISD::BITCAST, dl, MVT::f32, Result); +} + +static SDValue LowerFCOPYSIGN64(SDValue Op, SelectionDAG &DAG, bool isLittle) { + // FIXME: + // Use ext/ins instructions if target architecture is Mips32r2. + // Eliminate redundant mfc1 and mtc1 instructions. + unsigned LoIdx = 0, HiIdx = 1; + + if (!isLittle) + std::swap(LoIdx, HiIdx); + + DebugLoc dl = Op.getDebugLoc(); + SDValue Word0 = DAG.getNode(MipsISD::ExtractElementF64, dl, MVT::i32, + Op.getOperand(0), + DAG.getConstant(LoIdx, MVT::i32)); + SDValue Hi0 = DAG.getNode(MipsISD::ExtractElementF64, dl, MVT::i32, + Op.getOperand(0), DAG.getConstant(HiIdx, MVT::i32)); + SDValue Hi1 = DAG.getNode(MipsISD::ExtractElementF64, dl, MVT::i32, + Op.getOperand(1), DAG.getConstant(HiIdx, MVT::i32)); + SDValue And0 = DAG.getNode(ISD::AND, dl, MVT::i32, Hi0, + DAG.getConstant(0x7fffffff, MVT::i32)); + SDValue And1 = DAG.getNode(ISD::AND, dl, MVT::i32, Hi1, + DAG.getConstant(0x80000000, MVT::i32)); + SDValue Word1 = DAG.getNode(ISD::OR, dl, MVT::i32, And0, And1); + + if (!isLittle) + std::swap(Word0, Word1); + + return DAG.getNode(MipsISD::BuildPairF64, dl, MVT::f64, Word0, Word1); +} + +SDValue MipsTargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) + const { + EVT Ty = Op.getValueType(); + + assert(Ty == MVT::f32 || Ty == MVT::f64); + + if (Ty == MVT::f32) + return LowerFCOPYSIGN32(Op, DAG); + else + return LowerFCOPYSIGN64(Op, DAG, Subtarget->isLittle()); +} + //===----------------------------------------------------------------------===// // Calling Convention Implementation //===----------------------------------------------------------------------===// |
