diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp | 1388 |
1 files changed, 1388 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp b/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp new file mode 100644 index 0000000000000..c3c1beabd5f09 --- /dev/null +++ b/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp @@ -0,0 +1,1388 @@ +//===-------- LegalizeFloatTypes.cpp - Legalization of float types --------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file implements float type expansion and softening for LegalizeTypes. +// Softening is the act of turning a computation in an illegal floating point +// type into a computation in an integer type of the same size; also known as +// "soft float". For example, turning f32 arithmetic into operations using i32. +// The resulting integer value is the same as what you would get by performing +// the floating point operation and bitcasting the result to the integer type. +// Expansion is the act of changing a computation in an illegal type to be a +// computation in two identical registers of a smaller type. For example, +// implementing ppcf128 arithmetic in two f64 registers. +// +//===----------------------------------------------------------------------===// + +#include "LegalizeTypes.h" +using namespace llvm; + +/// GetFPLibCall - Return the right libcall for the given floating point type. +static RTLIB::Libcall GetFPLibCall(MVT VT, + RTLIB::Libcall Call_F32, + RTLIB::Libcall Call_F64, + RTLIB::Libcall Call_F80, + RTLIB::Libcall Call_PPCF128) { + return + VT == MVT::f32 ? Call_F32 : + VT == MVT::f64 ? Call_F64 : + VT == MVT::f80 ? Call_F80 : + VT == MVT::ppcf128 ? Call_PPCF128 : + RTLIB::UNKNOWN_LIBCALL; +} + +//===----------------------------------------------------------------------===// +// Result Float to Integer Conversion. +//===----------------------------------------------------------------------===// + +void DAGTypeLegalizer::SoftenFloatResult(SDNode *N, unsigned ResNo) { + DEBUG(cerr << "Soften float result " << ResNo << ": "; N->dump(&DAG); + cerr << "\n"); + SDValue R = SDValue(); + + switch (N->getOpcode()) { + default: +#ifndef NDEBUG + cerr << "SoftenFloatResult #" << ResNo << ": "; + N->dump(&DAG); cerr << "\n"; +#endif + assert(0 && "Do not know how to soften the result of this operator!"); + abort(); + + case ISD::BIT_CONVERT: R = SoftenFloatRes_BIT_CONVERT(N); break; + case ISD::BUILD_PAIR: R = SoftenFloatRes_BUILD_PAIR(N); break; + case ISD::ConstantFP: + R = SoftenFloatRes_ConstantFP(cast<ConstantFPSDNode>(N)); + break; + case ISD::EXTRACT_VECTOR_ELT: + R = SoftenFloatRes_EXTRACT_VECTOR_ELT(N); break; + case ISD::FABS: R = SoftenFloatRes_FABS(N); break; + case ISD::FADD: R = SoftenFloatRes_FADD(N); break; + case ISD::FCEIL: R = SoftenFloatRes_FCEIL(N); break; + case ISD::FCOPYSIGN: R = SoftenFloatRes_FCOPYSIGN(N); break; + case ISD::FCOS: R = SoftenFloatRes_FCOS(N); break; + case ISD::FDIV: R = SoftenFloatRes_FDIV(N); break; + case ISD::FEXP: R = SoftenFloatRes_FEXP(N); break; + case ISD::FEXP2: R = SoftenFloatRes_FEXP2(N); break; + case ISD::FFLOOR: R = SoftenFloatRes_FFLOOR(N); break; + case ISD::FLOG: R = SoftenFloatRes_FLOG(N); break; + case ISD::FLOG2: R = SoftenFloatRes_FLOG2(N); break; + case ISD::FLOG10: R = SoftenFloatRes_FLOG10(N); break; + case ISD::FMUL: R = SoftenFloatRes_FMUL(N); break; + case ISD::FNEARBYINT: R = SoftenFloatRes_FNEARBYINT(N); break; + case ISD::FNEG: R = SoftenFloatRes_FNEG(N); break; + case ISD::FP_EXTEND: R = SoftenFloatRes_FP_EXTEND(N); break; + case ISD::FP_ROUND: R = SoftenFloatRes_FP_ROUND(N); break; + case ISD::FPOW: R = SoftenFloatRes_FPOW(N); break; + case ISD::FPOWI: R = SoftenFloatRes_FPOWI(N); break; + case ISD::FREM: R = SoftenFloatRes_FREM(N); break; + case ISD::FRINT: R = SoftenFloatRes_FRINT(N); break; + case ISD::FSIN: R = SoftenFloatRes_FSIN(N); break; + case ISD::FSQRT: R = SoftenFloatRes_FSQRT(N); break; + case ISD::FSUB: R = SoftenFloatRes_FSUB(N); break; + case ISD::FTRUNC: R = SoftenFloatRes_FTRUNC(N); break; + case ISD::LOAD: R = SoftenFloatRes_LOAD(N); break; + case ISD::SELECT: R = SoftenFloatRes_SELECT(N); break; + case ISD::SELECT_CC: R = SoftenFloatRes_SELECT_CC(N); break; + case ISD::SINT_TO_FP: + case ISD::UINT_TO_FP: R = SoftenFloatRes_XINT_TO_FP(N); break; + case ISD::UNDEF: R = SoftenFloatRes_UNDEF(N); break; + case ISD::VAARG: R = SoftenFloatRes_VAARG(N); break; + } + + // If R is null, the sub-method took care of registering the result. + if (R.getNode()) + SetSoftenedFloat(SDValue(N, ResNo), R); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_BIT_CONVERT(SDNode *N) { + return BitConvertToInteger(N->getOperand(0)); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_BUILD_PAIR(SDNode *N) { + // Convert the inputs to integers, and build a new pair out of them. + return DAG.getNode(ISD::BUILD_PAIR, N->getDebugLoc(), + TLI.getTypeToTransformTo(N->getValueType(0)), + BitConvertToInteger(N->getOperand(0)), + BitConvertToInteger(N->getOperand(1))); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_ConstantFP(ConstantFPSDNode *N) { + return DAG.getConstant(N->getValueAPF().bitcastToAPInt(), + TLI.getTypeToTransformTo(N->getValueType(0))); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode *N) { + SDValue NewOp = BitConvertVectorToIntegerVector(N->getOperand(0)); + return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, N->getDebugLoc(), + NewOp.getValueType().getVectorElementType(), + NewOp, N->getOperand(1)); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FABS(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + unsigned Size = NVT.getSizeInBits(); + + // Mask = ~(1 << (Size-1)) + SDValue Mask = DAG.getConstant(APInt::getAllOnesValue(Size).clear(Size-1), + NVT); + SDValue Op = GetSoftenedFloat(N->getOperand(0)); + return DAG.getNode(ISD::AND, N->getDebugLoc(), NVT, Op, Mask); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FADD(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), + GetSoftenedFloat(N->getOperand(1)) }; + return MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::ADD_F32, + RTLIB::ADD_F64, + RTLIB::ADD_F80, + RTLIB::ADD_PPCF128), + NVT, Ops, 2, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FCEIL(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Op = GetSoftenedFloat(N->getOperand(0)); + return MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::CEIL_F32, + RTLIB::CEIL_F64, + RTLIB::CEIL_F80, + RTLIB::CEIL_PPCF128), + NVT, &Op, 1, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FCOPYSIGN(SDNode *N) { + SDValue LHS = GetSoftenedFloat(N->getOperand(0)); + SDValue RHS = BitConvertToInteger(N->getOperand(1)); + DebugLoc dl = N->getDebugLoc(); + + MVT LVT = LHS.getValueType(); + MVT RVT = RHS.getValueType(); + + unsigned LSize = LVT.getSizeInBits(); + unsigned RSize = RVT.getSizeInBits(); + + // First get the sign bit of second operand. + SDValue SignBit = DAG.getNode(ISD::SHL, dl, RVT, DAG.getConstant(1, RVT), + DAG.getConstant(RSize - 1, + TLI.getShiftAmountTy())); + SignBit = DAG.getNode(ISD::AND, dl, RVT, RHS, SignBit); + + // Shift right or sign-extend it if the two operands have different types. + int SizeDiff = RVT.getSizeInBits() - LVT.getSizeInBits(); + if (SizeDiff > 0) { + SignBit = DAG.getNode(ISD::SRL, dl, RVT, SignBit, + DAG.getConstant(SizeDiff, TLI.getShiftAmountTy())); + SignBit = DAG.getNode(ISD::TRUNCATE, dl, LVT, SignBit); + } else if (SizeDiff < 0) { + SignBit = DAG.getNode(ISD::ANY_EXTEND, dl, LVT, SignBit); + SignBit = DAG.getNode(ISD::SHL, dl, LVT, SignBit, + DAG.getConstant(-SizeDiff, TLI.getShiftAmountTy())); + } + + // Clear the sign bit of the first operand. + SDValue Mask = DAG.getNode(ISD::SHL, dl, LVT, DAG.getConstant(1, LVT), + DAG.getConstant(LSize - 1, + TLI.getShiftAmountTy())); + Mask = DAG.getNode(ISD::SUB, dl, LVT, Mask, DAG.getConstant(1, LVT)); + LHS = DAG.getNode(ISD::AND, dl, LVT, LHS, Mask); + + // Or the value with the sign bit. + return DAG.getNode(ISD::OR, dl, LVT, LHS, SignBit); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FCOS(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Op = GetSoftenedFloat(N->getOperand(0)); + return MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::COS_F32, + RTLIB::COS_F64, + RTLIB::COS_F80, + RTLIB::COS_PPCF128), + NVT, &Op, 1, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FDIV(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), + GetSoftenedFloat(N->getOperand(1)) }; + return MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::DIV_F32, + RTLIB::DIV_F64, + RTLIB::DIV_F80, + RTLIB::DIV_PPCF128), + NVT, Ops, 2, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Op = GetSoftenedFloat(N->getOperand(0)); + return MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::EXP_F32, + RTLIB::EXP_F64, + RTLIB::EXP_F80, + RTLIB::EXP_PPCF128), + NVT, &Op, 1, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP2(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Op = GetSoftenedFloat(N->getOperand(0)); + return MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::EXP2_F32, + RTLIB::EXP2_F64, + RTLIB::EXP2_F80, + RTLIB::EXP2_PPCF128), + NVT, &Op, 1, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FFLOOR(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Op = GetSoftenedFloat(N->getOperand(0)); + return MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::FLOOR_F32, + RTLIB::FLOOR_F64, + RTLIB::FLOOR_F80, + RTLIB::FLOOR_PPCF128), + NVT, &Op, 1, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Op = GetSoftenedFloat(N->getOperand(0)); + return MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::LOG_F32, + RTLIB::LOG_F64, + RTLIB::LOG_F80, + RTLIB::LOG_PPCF128), + NVT, &Op, 1, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG2(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Op = GetSoftenedFloat(N->getOperand(0)); + return MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::LOG2_F32, + RTLIB::LOG2_F64, + RTLIB::LOG2_F80, + RTLIB::LOG2_PPCF128), + NVT, &Op, 1, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG10(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Op = GetSoftenedFloat(N->getOperand(0)); + return MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::LOG10_F32, + RTLIB::LOG10_F64, + RTLIB::LOG10_F80, + RTLIB::LOG10_PPCF128), + NVT, &Op, 1, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FMUL(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), + GetSoftenedFloat(N->getOperand(1)) }; + return MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::MUL_F32, + RTLIB::MUL_F64, + RTLIB::MUL_F80, + RTLIB::MUL_PPCF128), + NVT, Ops, 2, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FNEARBYINT(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Op = GetSoftenedFloat(N->getOperand(0)); + return MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::NEARBYINT_F32, + RTLIB::NEARBYINT_F64, + RTLIB::NEARBYINT_F80, + RTLIB::NEARBYINT_PPCF128), + NVT, &Op, 1, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FNEG(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + // Expand Y = FNEG(X) -> Y = SUB -0.0, X + SDValue Ops[2] = { DAG.getConstantFP(-0.0, N->getValueType(0)), + GetSoftenedFloat(N->getOperand(0)) }; + return MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::SUB_F32, + RTLIB::SUB_F64, + RTLIB::SUB_F80, + RTLIB::SUB_PPCF128), + NVT, Ops, 2, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FP_EXTEND(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Op = N->getOperand(0); + RTLIB::Libcall LC = RTLIB::getFPEXT(Op.getValueType(), N->getValueType(0)); + assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_EXTEND!"); + return MakeLibCall(LC, NVT, &Op, 1, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FP_ROUND(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Op = N->getOperand(0); + RTLIB::Libcall LC = RTLIB::getFPROUND(Op.getValueType(), N->getValueType(0)); + assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND!"); + return MakeLibCall(LC, NVT, &Op, 1, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FPOW(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), + GetSoftenedFloat(N->getOperand(1)) }; + return MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::POW_F32, + RTLIB::POW_F64, + RTLIB::POW_F80, + RTLIB::POW_PPCF128), + NVT, Ops, 2, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FPOWI(SDNode *N) { + assert(N->getOperand(1).getValueType() == MVT::i32 && + "Unsupported power type!"); + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), N->getOperand(1) }; + return MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::POWI_F32, + RTLIB::POWI_F64, + RTLIB::POWI_F80, + RTLIB::POWI_PPCF128), + NVT, Ops, 2, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FREM(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), + GetSoftenedFloat(N->getOperand(1)) }; + return MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::REM_F32, + RTLIB::REM_F64, + RTLIB::REM_F80, + RTLIB::REM_PPCF128), + NVT, Ops, 2, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FRINT(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Op = GetSoftenedFloat(N->getOperand(0)); + return MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::RINT_F32, + RTLIB::RINT_F64, + RTLIB::RINT_F80, + RTLIB::RINT_PPCF128), + NVT, &Op, 1, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FSIN(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Op = GetSoftenedFloat(N->getOperand(0)); + return MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::SIN_F32, + RTLIB::SIN_F64, + RTLIB::SIN_F80, + RTLIB::SIN_PPCF128), + NVT, &Op, 1, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FSQRT(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Op = GetSoftenedFloat(N->getOperand(0)); + return MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::SQRT_F32, + RTLIB::SQRT_F64, + RTLIB::SQRT_F80, + RTLIB::SQRT_PPCF128), + NVT, &Op, 1, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FSUB(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), + GetSoftenedFloat(N->getOperand(1)) }; + return MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::SUB_F32, + RTLIB::SUB_F64, + RTLIB::SUB_F80, + RTLIB::SUB_PPCF128), + NVT, Ops, 2, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_FTRUNC(SDNode *N) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + SDValue Op = GetSoftenedFloat(N->getOperand(0)); + return MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::TRUNC_F32, + RTLIB::TRUNC_F64, + RTLIB::TRUNC_F80, + RTLIB::TRUNC_PPCF128), + NVT, &Op, 1, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_LOAD(SDNode *N) { + LoadSDNode *L = cast<LoadSDNode>(N); + MVT VT = N->getValueType(0); + MVT NVT = TLI.getTypeToTransformTo(VT); + DebugLoc dl = N->getDebugLoc(); + + SDValue NewL; + if (L->getExtensionType() == ISD::NON_EXTLOAD) { + NewL = DAG.getLoad(L->getAddressingMode(), dl, L->getExtensionType(), + NVT, L->getChain(), L->getBasePtr(), L->getOffset(), + L->getSrcValue(), L->getSrcValueOffset(), NVT, + L->isVolatile(), L->getAlignment()); + // Legalized the chain result - switch anything that used the old chain to + // use the new one. + ReplaceValueWith(SDValue(N, 1), NewL.getValue(1)); + return NewL; + } + + // Do a non-extending load followed by FP_EXTEND. + NewL = DAG.getLoad(L->getAddressingMode(), dl, ISD::NON_EXTLOAD, + L->getMemoryVT(), L->getChain(), + L->getBasePtr(), L->getOffset(), + L->getSrcValue(), L->getSrcValueOffset(), + L->getMemoryVT(), + L->isVolatile(), L->getAlignment()); + // Legalized the chain result - switch anything that used the old chain to + // use the new one. + ReplaceValueWith(SDValue(N, 1), NewL.getValue(1)); + return BitConvertToInteger(DAG.getNode(ISD::FP_EXTEND, dl, VT, NewL)); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT(SDNode *N) { + SDValue LHS = GetSoftenedFloat(N->getOperand(1)); + SDValue RHS = GetSoftenedFloat(N->getOperand(2)); + return DAG.getNode(ISD::SELECT, N->getDebugLoc(), + LHS.getValueType(), N->getOperand(0),LHS,RHS); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT_CC(SDNode *N) { + SDValue LHS = GetSoftenedFloat(N->getOperand(2)); + SDValue RHS = GetSoftenedFloat(N->getOperand(3)); + return DAG.getNode(ISD::SELECT_CC, N->getDebugLoc(), + LHS.getValueType(), N->getOperand(0), + N->getOperand(1), LHS, RHS, N->getOperand(4)); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_UNDEF(SDNode *N) { + return DAG.getUNDEF(TLI.getTypeToTransformTo(N->getValueType(0))); +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_VAARG(SDNode *N) { + SDValue Chain = N->getOperand(0); // Get the chain. + SDValue Ptr = N->getOperand(1); // Get the pointer. + MVT VT = N->getValueType(0); + MVT NVT = TLI.getTypeToTransformTo(VT); + DebugLoc dl = N->getDebugLoc(); + + SDValue NewVAARG; + NewVAARG = DAG.getVAArg(NVT, dl, Chain, Ptr, N->getOperand(2)); + + // Legalized the chain result - switch anything that used the old chain to + // use the new one. + ReplaceValueWith(SDValue(N, 1), NewVAARG.getValue(1)); + return NewVAARG; +} + +SDValue DAGTypeLegalizer::SoftenFloatRes_XINT_TO_FP(SDNode *N) { + bool Signed = N->getOpcode() == ISD::SINT_TO_FP; + MVT SVT = N->getOperand(0).getValueType(); + MVT RVT = N->getValueType(0); + MVT NVT = MVT(); + DebugLoc dl = N->getDebugLoc(); + + // If the input is not legal, eg: i1 -> fp, then it needs to be promoted to + // a larger type, eg: i8 -> fp. Even if it is legal, no libcall may exactly + // match. Look for an appropriate libcall. + RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL; + for (unsigned t = MVT::FIRST_INTEGER_VALUETYPE; + t <= MVT::LAST_INTEGER_VALUETYPE && LC == RTLIB::UNKNOWN_LIBCALL; ++t) { + NVT = (MVT::SimpleValueType)t; + // The source needs to big enough to hold the operand. + if (NVT.bitsGE(SVT)) + LC = Signed ? RTLIB::getSINTTOFP(NVT, RVT):RTLIB::getUINTTOFP (NVT, RVT); + } + assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!"); + + // Sign/zero extend the argument if the libcall takes a larger type. + SDValue Op = DAG.getNode(Signed ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl, + NVT, N->getOperand(0)); + return MakeLibCall(LC, TLI.getTypeToTransformTo(RVT), &Op, 1, false, dl); +} + + +//===----------------------------------------------------------------------===// +// Operand Float to Integer Conversion.. +//===----------------------------------------------------------------------===// + +bool DAGTypeLegalizer::SoftenFloatOperand(SDNode *N, unsigned OpNo) { + DEBUG(cerr << "Soften float operand " << OpNo << ": "; N->dump(&DAG); + cerr << "\n"); + SDValue Res = SDValue(); + + switch (N->getOpcode()) { + default: +#ifndef NDEBUG + cerr << "SoftenFloatOperand Op #" << OpNo << ": "; + N->dump(&DAG); cerr << "\n"; +#endif + assert(0 && "Do not know how to soften this operator's operand!"); + abort(); + + case ISD::BIT_CONVERT: Res = SoftenFloatOp_BIT_CONVERT(N); break; + case ISD::BR_CC: Res = SoftenFloatOp_BR_CC(N); break; + case ISD::FP_ROUND: Res = SoftenFloatOp_FP_ROUND(N); break; + case ISD::FP_TO_SINT: Res = SoftenFloatOp_FP_TO_SINT(N); break; + case ISD::FP_TO_UINT: Res = SoftenFloatOp_FP_TO_UINT(N); break; + case ISD::SELECT_CC: Res = SoftenFloatOp_SELECT_CC(N); break; + case ISD::SETCC: Res = SoftenFloatOp_SETCC(N); break; + case ISD::STORE: Res = SoftenFloatOp_STORE(N, OpNo); break; + } + + // If the result is null, the sub-method took care of registering results etc. + if (!Res.getNode()) return false; + + // If the result is N, the sub-method updated N in place. Tell the legalizer + // core about this. + if (Res.getNode() == N) + return true; + + assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 && + "Invalid operand expansion"); + + ReplaceValueWith(SDValue(N, 0), Res); + return false; +} + +/// SoftenSetCCOperands - Soften the operands of a comparison. This code is +/// shared among BR_CC, SELECT_CC, and SETCC handlers. +void DAGTypeLegalizer::SoftenSetCCOperands(SDValue &NewLHS, SDValue &NewRHS, + ISD::CondCode &CCCode, DebugLoc dl) { + SDValue LHSInt = GetSoftenedFloat(NewLHS); + SDValue RHSInt = GetSoftenedFloat(NewRHS); + MVT VT = NewLHS.getValueType(); + + assert((VT == MVT::f32 || VT == MVT::f64) && "Unsupported setcc type!"); + + // Expand into one or more soft-fp libcall(s). + RTLIB::Libcall LC1 = RTLIB::UNKNOWN_LIBCALL, LC2 = RTLIB::UNKNOWN_LIBCALL; + switch (CCCode) { + case ISD::SETEQ: + case ISD::SETOEQ: + LC1 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64; + break; + case ISD::SETNE: + case ISD::SETUNE: + LC1 = (VT == MVT::f32) ? RTLIB::UNE_F32 : RTLIB::UNE_F64; + break; + case ISD::SETGE: + case ISD::SETOGE: + LC1 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64; + break; + case ISD::SETLT: + case ISD::SETOLT: + LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64; + break; + case ISD::SETLE: + case ISD::SETOLE: + LC1 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64; + break; + case ISD::SETGT: + case ISD::SETOGT: + LC1 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64; + break; + case ISD::SETUO: + LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64; + break; + case ISD::SETO: + LC1 = (VT == MVT::f32) ? RTLIB::O_F32 : RTLIB::O_F64; + break; + default: + LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64; + switch (CCCode) { + case ISD::SETONE: + // SETONE = SETOLT | SETOGT + LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64; + // Fallthrough + case ISD::SETUGT: + LC2 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64; + break; + case ISD::SETUGE: + LC2 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64; + break; + case ISD::SETULT: + LC2 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64; + break; + case ISD::SETULE: + LC2 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64; + break; + case ISD::SETUEQ: + LC2 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64; + break; + default: assert(false && "Do not know how to soften this setcc!"); + } + } + + MVT RetVT = MVT::i32; // FIXME: is this the correct return type? + SDValue Ops[2] = { LHSInt, RHSInt }; + NewLHS = MakeLibCall(LC1, RetVT, Ops, 2, false/*sign irrelevant*/, dl); + NewRHS = DAG.getConstant(0, RetVT); + CCCode = TLI.getCmpLibcallCC(LC1); + if (LC2 != RTLIB::UNKNOWN_LIBCALL) { + SDValue Tmp = DAG.getNode(ISD::SETCC, dl, TLI.getSetCCResultType(RetVT), + NewLHS, NewRHS, DAG.getCondCode(CCCode)); + NewLHS = MakeLibCall(LC2, RetVT, Ops, 2, false/*sign irrelevant*/, dl); + NewLHS = DAG.getNode(ISD::SETCC, dl, TLI.getSetCCResultType(RetVT), NewLHS, + NewRHS, DAG.getCondCode(TLI.getCmpLibcallCC(LC2))); + NewLHS = DAG.getNode(ISD::OR, dl, Tmp.getValueType(), Tmp, NewLHS); + NewRHS = SDValue(); + } +} + +SDValue DAGTypeLegalizer::SoftenFloatOp_BIT_CONVERT(SDNode *N) { + return DAG.getNode(ISD::BIT_CONVERT, N->getDebugLoc(), N->getValueType(0), + GetSoftenedFloat(N->getOperand(0))); +} + +SDValue DAGTypeLegalizer::SoftenFloatOp_FP_ROUND(SDNode *N) { + MVT SVT = N->getOperand(0).getValueType(); + MVT RVT = N->getValueType(0); + + RTLIB::Libcall LC = RTLIB::getFPROUND(SVT, RVT); + assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND libcall"); + + SDValue Op = GetSoftenedFloat(N->getOperand(0)); + return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatOp_BR_CC(SDNode *N) { + SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3); + ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get(); + SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc()); + + // If SoftenSetCCOperands returned a scalar, we need to compare the result + // against zero to select between true and false values. + if (NewRHS.getNode() == 0) { + NewRHS = DAG.getConstant(0, NewLHS.getValueType()); + CCCode = ISD::SETNE; + } + + // Update N to have the operands specified. + return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0), + DAG.getCondCode(CCCode), NewLHS, NewRHS, + N->getOperand(4)); +} + +SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_SINT(SDNode *N) { + MVT RVT = N->getValueType(0); + RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT); + assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!"); + SDValue Op = GetSoftenedFloat(N->getOperand(0)); + return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_UINT(SDNode *N) { + MVT RVT = N->getValueType(0); + RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT); + assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!"); + SDValue Op = GetSoftenedFloat(N->getOperand(0)); + return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc()); +} + +SDValue DAGTypeLegalizer::SoftenFloatOp_SELECT_CC(SDNode *N) { + SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1); + ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get(); + SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc()); + + // If SoftenSetCCOperands returned a scalar, we need to compare the result + // against zero to select between true and false values. + if (NewRHS.getNode() == 0) { + NewRHS = DAG.getConstant(0, NewLHS.getValueType()); + CCCode = ISD::SETNE; + } + + // Update N to have the operands specified. + return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS, + N->getOperand(2), N->getOperand(3), + DAG.getCondCode(CCCode)); +} + +SDValue DAGTypeLegalizer::SoftenFloatOp_SETCC(SDNode *N) { + SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1); + ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get(); + SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc()); + + // If SoftenSetCCOperands returned a scalar, use it. + if (NewRHS.getNode() == 0) { + assert(NewLHS.getValueType() == N->getValueType(0) && + "Unexpected setcc expansion!"); + return NewLHS; + } + + // Otherwise, update N to have the operands specified. + return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS, + DAG.getCondCode(CCCode)); +} + +SDValue DAGTypeLegalizer::SoftenFloatOp_STORE(SDNode *N, unsigned OpNo) { + assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!"); + assert(OpNo == 1 && "Can only soften the stored value!"); + StoreSDNode *ST = cast<StoreSDNode>(N); + SDValue Val = ST->getValue(); + DebugLoc dl = N->getDebugLoc(); + + if (ST->isTruncatingStore()) + // Do an FP_ROUND followed by a non-truncating store. + Val = BitConvertToInteger(DAG.getNode(ISD::FP_ROUND, dl, ST->getMemoryVT(), + Val, DAG.getIntPtrConstant(0))); + else + Val = GetSoftenedFloat(Val); + + return DAG.getStore(ST->getChain(), dl, Val, ST->getBasePtr(), + ST->getSrcValue(), ST->getSrcValueOffset(), + ST->isVolatile(), ST->getAlignment()); +} + + +//===----------------------------------------------------------------------===// +// Float Result Expansion +//===----------------------------------------------------------------------===// + +/// ExpandFloatResult - This method is called when the specified result of the +/// specified node is found to need expansion. At this point, the node may also +/// have invalid operands or may have other results that need promotion, we just +/// know that (at least) one result needs expansion. +void DAGTypeLegalizer::ExpandFloatResult(SDNode *N, unsigned ResNo) { + DEBUG(cerr << "Expand float result: "; N->dump(&DAG); cerr << "\n"); + SDValue Lo, Hi; + Lo = Hi = SDValue(); + + // See if the target wants to custom expand this node. + if (CustomLowerNode(N, N->getValueType(ResNo), true)) + return; + + switch (N->getOpcode()) { + default: +#ifndef NDEBUG + cerr << "ExpandFloatResult #" << ResNo << ": "; + N->dump(&DAG); cerr << "\n"; +#endif + assert(0 && "Do not know how to expand the result of this operator!"); + abort(); + + case ISD::MERGE_VALUES: SplitRes_MERGE_VALUES(N, Lo, Hi); break; + case ISD::UNDEF: SplitRes_UNDEF(N, Lo, Hi); break; + case ISD::SELECT: SplitRes_SELECT(N, Lo, Hi); break; + case ISD::SELECT_CC: SplitRes_SELECT_CC(N, Lo, Hi); break; + + case ISD::BIT_CONVERT: ExpandRes_BIT_CONVERT(N, Lo, Hi); break; + case ISD::BUILD_PAIR: ExpandRes_BUILD_PAIR(N, Lo, Hi); break; + case ISD::EXTRACT_ELEMENT: ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break; + case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break; + case ISD::VAARG: ExpandRes_VAARG(N, Lo, Hi); break; + + case ISD::ConstantFP: ExpandFloatRes_ConstantFP(N, Lo, Hi); break; + case ISD::FABS: ExpandFloatRes_FABS(N, Lo, Hi); break; + case ISD::FADD: ExpandFloatRes_FADD(N, Lo, Hi); break; + case ISD::FCEIL: ExpandFloatRes_FCEIL(N, Lo, Hi); break; + case ISD::FCOS: ExpandFloatRes_FCOS(N, Lo, Hi); break; + case ISD::FDIV: ExpandFloatRes_FDIV(N, Lo, Hi); break; + case ISD::FEXP: ExpandFloatRes_FEXP(N, Lo, Hi); break; + case ISD::FEXP2: ExpandFloatRes_FEXP2(N, Lo, Hi); break; + case ISD::FFLOOR: ExpandFloatRes_FFLOOR(N, Lo, Hi); break; + case ISD::FLOG: ExpandFloatRes_FLOG(N, Lo, Hi); break; + case ISD::FLOG2: ExpandFloatRes_FLOG2(N, Lo, Hi); break; + case ISD::FLOG10: ExpandFloatRes_FLOG10(N, Lo, Hi); break; + case ISD::FMUL: ExpandFloatRes_FMUL(N, Lo, Hi); break; + case ISD::FNEARBYINT: ExpandFloatRes_FNEARBYINT(N, Lo, Hi); break; + case ISD::FNEG: ExpandFloatRes_FNEG(N, Lo, Hi); break; + case ISD::FP_EXTEND: ExpandFloatRes_FP_EXTEND(N, Lo, Hi); break; + case ISD::FPOW: ExpandFloatRes_FPOW(N, Lo, Hi); break; + case ISD::FPOWI: ExpandFloatRes_FPOWI(N, Lo, Hi); break; + case ISD::FRINT: ExpandFloatRes_FRINT(N, Lo, Hi); break; + case ISD::FSIN: ExpandFloatRes_FSIN(N, Lo, Hi); break; + case ISD::FSQRT: ExpandFloatRes_FSQRT(N, Lo, Hi); break; + case ISD::FSUB: ExpandFloatRes_FSUB(N, Lo, Hi); break; + case ISD::FTRUNC: ExpandFloatRes_FTRUNC(N, Lo, Hi); break; + case ISD::LOAD: ExpandFloatRes_LOAD(N, Lo, Hi); break; + case ISD::SINT_TO_FP: + case ISD::UINT_TO_FP: ExpandFloatRes_XINT_TO_FP(N, Lo, Hi); break; + } + + // If Lo/Hi is null, the sub-method took care of registering results etc. + if (Lo.getNode()) + SetExpandedFloat(SDValue(N, ResNo), Lo, Hi); +} + +void DAGTypeLegalizer::ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo, + SDValue &Hi) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + assert(NVT.getSizeInBits() == integerPartWidth && + "Do not know how to expand this float constant!"); + APInt C = cast<ConstantFPSDNode>(N)->getValueAPF().bitcastToAPInt(); + Lo = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1, + &C.getRawData()[1])), NVT); + Hi = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1, + &C.getRawData()[0])), NVT); +} + +void DAGTypeLegalizer::ExpandFloatRes_FABS(SDNode *N, SDValue &Lo, + SDValue &Hi) { + assert(N->getValueType(0) == MVT::ppcf128 && + "Logic only correct for ppcf128!"); + DebugLoc dl = N->getDebugLoc(); + SDValue Tmp; + GetExpandedFloat(N->getOperand(0), Lo, Tmp); + Hi = DAG.getNode(ISD::FABS, dl, Tmp.getValueType(), Tmp); + // Lo = Hi==fabs(Hi) ? Lo : -Lo; + Lo = DAG.getNode(ISD::SELECT_CC, dl, Lo.getValueType(), Tmp, Hi, Lo, + DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo), + DAG.getCondCode(ISD::SETEQ)); +} + +void DAGTypeLegalizer::ExpandFloatRes_FADD(SDNode *N, SDValue &Lo, + SDValue &Hi) { + SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0), + RTLIB::ADD_F32, RTLIB::ADD_F64, + RTLIB::ADD_F80, RTLIB::ADD_PPCF128), + N, false); + GetPairElements(Call, Lo, Hi); +} + +void DAGTypeLegalizer::ExpandFloatRes_FCEIL(SDNode *N, + SDValue &Lo, SDValue &Hi) { + SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0), + RTLIB::CEIL_F32, RTLIB::CEIL_F64, + RTLIB::CEIL_F80, RTLIB::CEIL_PPCF128), + N, false); + GetPairElements(Call, Lo, Hi); +} + +void DAGTypeLegalizer::ExpandFloatRes_FCOS(SDNode *N, + SDValue &Lo, SDValue &Hi) { + SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0), + RTLIB::COS_F32, RTLIB::COS_F64, + RTLIB::COS_F80, RTLIB::COS_PPCF128), + N, false); + GetPairElements(Call, Lo, Hi); +} + +void DAGTypeLegalizer::ExpandFloatRes_FDIV(SDNode *N, SDValue &Lo, + SDValue &Hi) { + SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) }; + SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::DIV_F32, + RTLIB::DIV_F64, + RTLIB::DIV_F80, + RTLIB::DIV_PPCF128), + N->getValueType(0), Ops, 2, false, + N->getDebugLoc()); + GetPairElements(Call, Lo, Hi); +} + +void DAGTypeLegalizer::ExpandFloatRes_FEXP(SDNode *N, + SDValue &Lo, SDValue &Hi) { + SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0), + RTLIB::EXP_F32, RTLIB::EXP_F64, + RTLIB::EXP_F80, RTLIB::EXP_PPCF128), + N, false); + GetPairElements(Call, Lo, Hi); +} + +void DAGTypeLegalizer::ExpandFloatRes_FEXP2(SDNode *N, + SDValue &Lo, SDValue &Hi) { + SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0), + RTLIB::EXP2_F32, RTLIB::EXP2_F64, + RTLIB::EXP2_F80, RTLIB::EXP2_PPCF128), + N, false); + GetPairElements(Call, Lo, Hi); +} + +void DAGTypeLegalizer::ExpandFloatRes_FFLOOR(SDNode *N, + SDValue &Lo, SDValue &Hi) { + SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0), + RTLIB::FLOOR_F32,RTLIB::FLOOR_F64, + RTLIB::FLOOR_F80,RTLIB::FLOOR_PPCF128), + N, false); + GetPairElements(Call, Lo, Hi); +} + +void DAGTypeLegalizer::ExpandFloatRes_FLOG(SDNode *N, + SDValue &Lo, SDValue &Hi) { + SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0), + RTLIB::LOG_F32, RTLIB::LOG_F64, + RTLIB::LOG_F80, RTLIB::LOG_PPCF128), + N, false); + GetPairElements(Call, Lo, Hi); +} + +void DAGTypeLegalizer::ExpandFloatRes_FLOG2(SDNode *N, + SDValue &Lo, SDValue &Hi) { + SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0), + RTLIB::LOG2_F32, RTLIB::LOG2_F64, + RTLIB::LOG2_F80, RTLIB::LOG2_PPCF128), + N, false); + GetPairElements(Call, Lo, Hi); +} + +void DAGTypeLegalizer::ExpandFloatRes_FLOG10(SDNode *N, + SDValue &Lo, SDValue &Hi) { + SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0), + RTLIB::LOG10_F32,RTLIB::LOG10_F64, + RTLIB::LOG10_F80,RTLIB::LOG10_PPCF128), + N, false); + GetPairElements(Call, Lo, Hi); +} + +void DAGTypeLegalizer::ExpandFloatRes_FMUL(SDNode *N, SDValue &Lo, + SDValue &Hi) { + SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) }; + SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::MUL_F32, + RTLIB::MUL_F64, + RTLIB::MUL_F80, + RTLIB::MUL_PPCF128), + N->getValueType(0), Ops, 2, false, + N->getDebugLoc()); + GetPairElements(Call, Lo, Hi); +} + +void DAGTypeLegalizer::ExpandFloatRes_FNEARBYINT(SDNode *N, + SDValue &Lo, SDValue &Hi) { + SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0), + RTLIB::NEARBYINT_F32, + RTLIB::NEARBYINT_F64, + RTLIB::NEARBYINT_F80, + RTLIB::NEARBYINT_PPCF128), + N, false); + GetPairElements(Call, Lo, Hi); +} + +void DAGTypeLegalizer::ExpandFloatRes_FNEG(SDNode *N, SDValue &Lo, + SDValue &Hi) { + DebugLoc dl = N->getDebugLoc(); + GetExpandedFloat(N->getOperand(0), Lo, Hi); + Lo = DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo); + Hi = DAG.getNode(ISD::FNEG, dl, Hi.getValueType(), Hi); +} + +void DAGTypeLegalizer::ExpandFloatRes_FP_EXTEND(SDNode *N, SDValue &Lo, + SDValue &Hi) { + MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0)); + Hi = DAG.getNode(ISD::FP_EXTEND, N->getDebugLoc(), NVT, N->getOperand(0)); + Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT); +} + +void DAGTypeLegalizer::ExpandFloatRes_FPOW(SDNode *N, + SDValue &Lo, SDValue &Hi) { + SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0), + RTLIB::POW_F32, RTLIB::POW_F64, + RTLIB::POW_F80, RTLIB::POW_PPCF128), + N, false); + GetPairElements(Call, Lo, Hi); +} + +void DAGTypeLegalizer::ExpandFloatRes_FPOWI(SDNode *N, + SDValue &Lo, SDValue &Hi) { + SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0), + RTLIB::POWI_F32, RTLIB::POWI_F64, + RTLIB::POWI_F80, RTLIB::POWI_PPCF128), + N, false); + GetPairElements(Call, Lo, Hi); +} + +void DAGTypeLegalizer::ExpandFloatRes_FRINT(SDNode *N, + SDValue &Lo, SDValue &Hi) { + SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0), + RTLIB::RINT_F32, RTLIB::RINT_F64, + RTLIB::RINT_F80, RTLIB::RINT_PPCF128), + N, false); + GetPairElements(Call, Lo, Hi); +} + +void DAGTypeLegalizer::ExpandFloatRes_FSIN(SDNode *N, + SDValue &Lo, SDValue &Hi) { + SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0), + RTLIB::SIN_F32, RTLIB::SIN_F64, + RTLIB::SIN_F80, RTLIB::SIN_PPCF128), + N, false); + GetPairElements(Call, Lo, Hi); +} + +void DAGTypeLegalizer::ExpandFloatRes_FSQRT(SDNode *N, + SDValue &Lo, SDValue &Hi) { + SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0), + RTLIB::SQRT_F32, RTLIB::SQRT_F64, + RTLIB::SQRT_F80, RTLIB::SQRT_PPCF128), + N, false); + GetPairElements(Call, Lo, Hi); +} + +void DAGTypeLegalizer::ExpandFloatRes_FSUB(SDNode *N, SDValue &Lo, + SDValue &Hi) { + SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) }; + SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0), + RTLIB::SUB_F32, + RTLIB::SUB_F64, + RTLIB::SUB_F80, + RTLIB::SUB_PPCF128), + N->getValueType(0), Ops, 2, false, + N->getDebugLoc()); + GetPairElements(Call, Lo, Hi); +} + +void DAGTypeLegalizer::ExpandFloatRes_FTRUNC(SDNode *N, + SDValue &Lo, SDValue &Hi) { + SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0), + RTLIB::TRUNC_F32, RTLIB::TRUNC_F64, + RTLIB::TRUNC_F80, RTLIB::TRUNC_PPCF128), + N, false); + GetPairElements(Call, Lo, Hi); +} + +void DAGTypeLegalizer::ExpandFloatRes_LOAD(SDNode *N, SDValue &Lo, + SDValue &Hi) { + if (ISD::isNormalLoad(N)) { + ExpandRes_NormalLoad(N, Lo, Hi); + return; + } + + assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!"); + LoadSDNode *LD = cast<LoadSDNode>(N); + SDValue Chain = LD->getChain(); + SDValue Ptr = LD->getBasePtr(); + DebugLoc dl = N->getDebugLoc(); + + MVT NVT = TLI.getTypeToTransformTo(LD->getValueType(0)); + assert(NVT.isByteSized() && "Expanded type not byte sized!"); + assert(LD->getMemoryVT().bitsLE(NVT) && "Float type not round?"); + + Hi = DAG.getExtLoad(LD->getExtensionType(), dl, NVT, Chain, Ptr, + LD->getSrcValue(), LD->getSrcValueOffset(), + LD->getMemoryVT(), + LD->isVolatile(), LD->getAlignment()); + + // Remember the chain. + Chain = Hi.getValue(1); + + // The low part is zero. + Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT); + + // Modified the chain - switch anything that used the old chain to use the + // new one. + ReplaceValueWith(SDValue(LD, 1), Chain); +} + +void DAGTypeLegalizer::ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo, + SDValue &Hi) { + assert(N->getValueType(0) == MVT::ppcf128 && "Unsupported XINT_TO_FP!"); + MVT VT = N->getValueType(0); + MVT NVT = TLI.getTypeToTransformTo(VT); + SDValue Src = N->getOperand(0); + MVT SrcVT = Src.getValueType(); + bool isSigned = N->getOpcode() == ISD::SINT_TO_FP; + DebugLoc dl = N->getDebugLoc(); + + // First do an SINT_TO_FP, whether the original was signed or unsigned. + // When promoting partial word types to i32 we must honor the signedness, + // though. + if (SrcVT.bitsLE(MVT::i32)) { + // The integer can be represented exactly in an f64. + Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl, + MVT::i32, Src); + Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT); + Hi = DAG.getNode(ISD::SINT_TO_FP, dl, NVT, Src); + } else { + RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL; + if (SrcVT.bitsLE(MVT::i64)) { + Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl, + MVT::i64, Src); + LC = RTLIB::SINTTOFP_I64_PPCF128; + } else if (SrcVT.bitsLE(MVT::i128)) { + Src = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i128, Src); + LC = RTLIB::SINTTOFP_I128_PPCF128; + } + assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!"); + + Hi = MakeLibCall(LC, VT, &Src, 1, true, dl); + GetPairElements(Hi, Lo, Hi); + } + + if (isSigned) + return; + + // Unsigned - fix up the SINT_TO_FP value just calculated. + Hi = DAG.getNode(ISD::BUILD_PAIR, dl, VT, Lo, Hi); + SrcVT = Src.getValueType(); + + // x>=0 ? (ppcf128)(iN)x : (ppcf128)(iN)x + 2^N; N=32,64,128. + static const uint64_t TwoE32[] = { 0x41f0000000000000LL, 0 }; + static const uint64_t TwoE64[] = { 0x43f0000000000000LL, 0 }; + static const uint64_t TwoE128[] = { 0x47f0000000000000LL, 0 }; + const uint64_t *Parts = 0; + + switch (SrcVT.getSimpleVT()) { + default: + assert(false && "Unsupported UINT_TO_FP!"); + case MVT::i32: + Parts = TwoE32; + break; + case MVT::i64: + Parts = TwoE64; + break; + case MVT::i128: + Parts = TwoE128; + break; + } + + Lo = DAG.getNode(ISD::FADD, dl, VT, Hi, + DAG.getConstantFP(APFloat(APInt(128, 2, Parts)), + MVT::ppcf128)); + Lo = DAG.getNode(ISD::SELECT_CC, dl, VT, Src, DAG.getConstant(0, SrcVT), + Lo, Hi, DAG.getCondCode(ISD::SETLT)); + GetPairElements(Lo, Lo, Hi); +} + + +//===----------------------------------------------------------------------===// +// Float Operand Expansion +//===----------------------------------------------------------------------===// + +/// ExpandFloatOperand - This method is called when the specified operand of the +/// specified node is found to need expansion. At this point, all of the result +/// types of the node are known to be legal, but other operands of the node may +/// need promotion or expansion as well as the specified one. +bool DAGTypeLegalizer::ExpandFloatOperand(SDNode *N, unsigned OpNo) { + DEBUG(cerr << "Expand float operand: "; N->dump(&DAG); cerr << "\n"); + SDValue Res = SDValue(); + + if (TLI.getOperationAction(N->getOpcode(), N->getOperand(OpNo).getValueType()) + == TargetLowering::Custom) + Res = TLI.LowerOperation(SDValue(N, 0), DAG); + + if (Res.getNode() == 0) { + switch (N->getOpcode()) { + default: + #ifndef NDEBUG + cerr << "ExpandFloatOperand Op #" << OpNo << ": "; + N->dump(&DAG); cerr << "\n"; + #endif + assert(0 && "Do not know how to expand this operator's operand!"); + abort(); + + case ISD::BIT_CONVERT: Res = ExpandOp_BIT_CONVERT(N); break; + case ISD::BUILD_VECTOR: Res = ExpandOp_BUILD_VECTOR(N); break; + case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break; + + case ISD::BR_CC: Res = ExpandFloatOp_BR_CC(N); break; + case ISD::FP_ROUND: Res = ExpandFloatOp_FP_ROUND(N); break; + case ISD::FP_TO_SINT: Res = ExpandFloatOp_FP_TO_SINT(N); break; + case ISD::FP_TO_UINT: Res = ExpandFloatOp_FP_TO_UINT(N); break; + case ISD::SELECT_CC: Res = ExpandFloatOp_SELECT_CC(N); break; + case ISD::SETCC: Res = ExpandFloatOp_SETCC(N); break; + case ISD::STORE: Res = ExpandFloatOp_STORE(cast<StoreSDNode>(N), + OpNo); break; + } + } + + // If the result is null, the sub-method took care of registering results etc. + if (!Res.getNode()) return false; + + // If the result is N, the sub-method updated N in place. Tell the legalizer + // core about this. + if (Res.getNode() == N) + return true; + + assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 && + "Invalid operand expansion"); + + ReplaceValueWith(SDValue(N, 0), Res); + return false; +} + +/// FloatExpandSetCCOperands - Expand the operands of a comparison. This code +/// is shared among BR_CC, SELECT_CC, and SETCC handlers. +void DAGTypeLegalizer::FloatExpandSetCCOperands(SDValue &NewLHS, + SDValue &NewRHS, + ISD::CondCode &CCCode, + DebugLoc dl) { + SDValue LHSLo, LHSHi, RHSLo, RHSHi; + GetExpandedFloat(NewLHS, LHSLo, LHSHi); + GetExpandedFloat(NewRHS, RHSLo, RHSHi); + + MVT VT = NewLHS.getValueType(); + assert(VT == MVT::ppcf128 && "Unsupported setcc type!"); + + // FIXME: This generated code sucks. We want to generate + // FCMPU crN, hi1, hi2 + // BNE crN, L: + // FCMPU crN, lo1, lo2 + // The following can be improved, but not that much. + SDValue Tmp1, Tmp2, Tmp3; + Tmp1 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()), + LHSHi, RHSHi, ISD::SETOEQ); + Tmp2 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSLo.getValueType()), + LHSLo, RHSLo, CCCode); + Tmp3 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2); + Tmp1 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()), + LHSHi, RHSHi, ISD::SETUNE); + Tmp2 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()), + LHSHi, RHSHi, CCCode); + Tmp1 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2); + NewLHS = DAG.getNode(ISD::OR, dl, Tmp1.getValueType(), Tmp1, Tmp3); + NewRHS = SDValue(); // LHS is the result, not a compare. +} + +SDValue DAGTypeLegalizer::ExpandFloatOp_BR_CC(SDNode *N) { + SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3); + ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get(); + FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc()); + + // If ExpandSetCCOperands returned a scalar, we need to compare the result + // against zero to select between true and false values. + if (NewRHS.getNode() == 0) { + NewRHS = DAG.getConstant(0, NewLHS.getValueType()); + CCCode = ISD::SETNE; + } + + // Update N to have the operands specified. + return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0), + DAG.getCondCode(CCCode), NewLHS, NewRHS, + N->getOperand(4)); +} + +SDValue DAGTypeLegalizer::ExpandFloatOp_FP_ROUND(SDNode *N) { + assert(N->getOperand(0).getValueType() == MVT::ppcf128 && + "Logic only correct for ppcf128!"); + SDValue Lo, Hi; + GetExpandedFloat(N->getOperand(0), Lo, Hi); + // Round it the rest of the way (e.g. to f32) if needed. + return DAG.getNode(ISD::FP_ROUND, N->getDebugLoc(), + N->getValueType(0), Hi, N->getOperand(1)); +} + +SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_SINT(SDNode *N) { + MVT RVT = N->getValueType(0); + DebugLoc dl = N->getDebugLoc(); + + // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on + // PPC (the libcall is not available). FIXME: Do this in a less hacky way. + if (RVT == MVT::i32) { + assert(N->getOperand(0).getValueType() == MVT::ppcf128 && + "Logic only correct for ppcf128!"); + SDValue Res = DAG.getNode(ISD::FP_ROUND_INREG, dl, MVT::ppcf128, + N->getOperand(0), DAG.getValueType(MVT::f64)); + Res = DAG.getNode(ISD::FP_ROUND, dl, MVT::f64, Res, + DAG.getIntPtrConstant(1)); + return DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32, Res); + } + + RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT); + assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!"); + return MakeLibCall(LC, RVT, &N->getOperand(0), 1, false, dl); +} + +SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_UINT(SDNode *N) { + MVT RVT = N->getValueType(0); + DebugLoc dl = N->getDebugLoc(); + + // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on + // PPC (the libcall is not available). FIXME: Do this in a less hacky way. + if (RVT == MVT::i32) { + assert(N->getOperand(0).getValueType() == MVT::ppcf128 && + "Logic only correct for ppcf128!"); + const uint64_t TwoE31[] = {0x41e0000000000000LL, 0}; + APFloat APF = APFloat(APInt(128, 2, TwoE31)); + SDValue Tmp = DAG.getConstantFP(APF, MVT::ppcf128); + // X>=2^31 ? (int)(X-2^31)+0x80000000 : (int)X + // FIXME: generated code sucks. + return DAG.getNode(ISD::SELECT_CC, dl, MVT::i32, N->getOperand(0), Tmp, + DAG.getNode(ISD::ADD, dl, MVT::i32, + DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32, + DAG.getNode(ISD::FSUB, dl, + MVT::ppcf128, + N->getOperand(0), + Tmp)), + DAG.getConstant(0x80000000, MVT::i32)), + DAG.getNode(ISD::FP_TO_SINT, dl, + MVT::i32, N->getOperand(0)), + DAG.getCondCode(ISD::SETGE)); + } + + RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT); + assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!"); + return MakeLibCall(LC, N->getValueType(0), &N->getOperand(0), 1, false, dl); +} + +SDValue DAGTypeLegalizer::ExpandFloatOp_SELECT_CC(SDNode *N) { + SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1); + ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get(); + FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc()); + + // If ExpandSetCCOperands returned a scalar, we need to compare the result + // against zero to select between true and false values. + if (NewRHS.getNode() == 0) { + NewRHS = DAG.getConstant(0, NewLHS.getValueType()); + CCCode = ISD::SETNE; + } + + // Update N to have the operands specified. + return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS, + N->getOperand(2), N->getOperand(3), + DAG.getCondCode(CCCode)); +} + +SDValue DAGTypeLegalizer::ExpandFloatOp_SETCC(SDNode *N) { + SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1); + ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get(); + FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc()); + + // If ExpandSetCCOperands returned a scalar, use it. + if (NewRHS.getNode() == 0) { + assert(NewLHS.getValueType() == N->getValueType(0) && + "Unexpected setcc expansion!"); + return NewLHS; + } + + // Otherwise, update N to have the operands specified. + return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS, + DAG.getCondCode(CCCode)); +} + +SDValue DAGTypeLegalizer::ExpandFloatOp_STORE(SDNode *N, unsigned OpNo) { + if (ISD::isNormalStore(N)) + return ExpandOp_NormalStore(N, OpNo); + + assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!"); + assert(OpNo == 1 && "Can only expand the stored value so far"); + StoreSDNode *ST = cast<StoreSDNode>(N); + + SDValue Chain = ST->getChain(); + SDValue Ptr = ST->getBasePtr(); + + MVT NVT = TLI.getTypeToTransformTo(ST->getValue().getValueType()); + assert(NVT.isByteSized() && "Expanded type not byte sized!"); + assert(ST->getMemoryVT().bitsLE(NVT) && "Float type not round?"); + + SDValue Lo, Hi; + GetExpandedOp(ST->getValue(), Lo, Hi); + + return DAG.getTruncStore(Chain, N->getDebugLoc(), Hi, Ptr, + ST->getSrcValue(), ST->getSrcValueOffset(), + ST->getMemoryVT(), + ST->isVolatile(), ST->getAlignment()); +} |