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//===-------- LegalizeFloatTypes.cpp - Legalization of float types --------===//
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// The LLVM Compiler Infrastructure
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//===----------------------------------------------------------------------===//
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// This file implements float type expansion and softening for LegalizeTypes.
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// Softening is the act of turning a computation in an illegal floating point
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// type into a computation in an integer type of the same size; also known as
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// "soft float". For example, turning f32 arithmetic into operations using i32.
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// The resulting integer value is the same as what you would get by performing
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// the floating point operation and bitcasting the result to the integer type.
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// Expansion is the act of changing a computation in an illegal type to be a
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// computation in two identical registers of a smaller type. For example,
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// implementing ppcf128 arithmetic in two f64 registers.
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//===----------------------------------------------------------------------===//
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#include "LegalizeTypes.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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/// GetFPLibCall - Return the right libcall for the given floating point type.
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static RTLIB::Libcall GetFPLibCall(EVT VT,
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RTLIB::Libcall Call_F32,
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RTLIB::Libcall Call_F64,
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RTLIB::Libcall Call_F80,
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RTLIB::Libcall Call_PPCF128) {
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VT == MVT::f32 ? Call_F32 :
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VT == MVT::f64 ? Call_F64 :
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VT == MVT::f80 ? Call_F80 :
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VT == MVT::ppcf128 ? Call_PPCF128 :
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RTLIB::UNKNOWN_LIBCALL;
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//===----------------------------------------------------------------------===//
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// Result Float to Integer Conversion.
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//===----------------------------------------------------------------------===//
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void DAGTypeLegalizer::SoftenFloatResult(SDNode *N, unsigned ResNo) {
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DEBUG(dbgs() << "Soften float result " << ResNo << ": "; N->dump(&DAG);
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SDValue R = SDValue();
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switch (N->getOpcode()) {
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dbgs() << "SoftenFloatResult #" << ResNo << ": ";
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N->dump(&DAG); dbgs() << "\n";
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llvm_unreachable("Do not know how to soften the result of this operator!");
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case ISD::BIT_CONVERT: R = SoftenFloatRes_BIT_CONVERT(N); break;
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case ISD::BUILD_PAIR: R = SoftenFloatRes_BUILD_PAIR(N); break;
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R = SoftenFloatRes_ConstantFP(cast<ConstantFPSDNode>(N));
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case ISD::EXTRACT_VECTOR_ELT:
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R = SoftenFloatRes_EXTRACT_VECTOR_ELT(N); break;
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case ISD::FABS: R = SoftenFloatRes_FABS(N); break;
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case ISD::FADD: R = SoftenFloatRes_FADD(N); break;
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case ISD::FCEIL: R = SoftenFloatRes_FCEIL(N); break;
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case ISD::FCOPYSIGN: R = SoftenFloatRes_FCOPYSIGN(N); break;
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case ISD::FCOS: R = SoftenFloatRes_FCOS(N); break;
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case ISD::FDIV: R = SoftenFloatRes_FDIV(N); break;
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case ISD::FEXP: R = SoftenFloatRes_FEXP(N); break;
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case ISD::FEXP2: R = SoftenFloatRes_FEXP2(N); break;
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case ISD::FFLOOR: R = SoftenFloatRes_FFLOOR(N); break;
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case ISD::FLOG: R = SoftenFloatRes_FLOG(N); break;
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case ISD::FLOG2: R = SoftenFloatRes_FLOG2(N); break;
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case ISD::FLOG10: R = SoftenFloatRes_FLOG10(N); break;
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case ISD::FMUL: R = SoftenFloatRes_FMUL(N); break;
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case ISD::FNEARBYINT: R = SoftenFloatRes_FNEARBYINT(N); break;
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case ISD::FNEG: R = SoftenFloatRes_FNEG(N); break;
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case ISD::FP_EXTEND: R = SoftenFloatRes_FP_EXTEND(N); break;
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case ISD::FP_ROUND: R = SoftenFloatRes_FP_ROUND(N); break;
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case ISD::FP16_TO_FP32:R = SoftenFloatRes_FP16_TO_FP32(N); break;
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case ISD::FPOW: R = SoftenFloatRes_FPOW(N); break;
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case ISD::FPOWI: R = SoftenFloatRes_FPOWI(N); break;
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case ISD::FREM: R = SoftenFloatRes_FREM(N); break;
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case ISD::FRINT: R = SoftenFloatRes_FRINT(N); break;
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case ISD::FSIN: R = SoftenFloatRes_FSIN(N); break;
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case ISD::FSQRT: R = SoftenFloatRes_FSQRT(N); break;
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case ISD::FSUB: R = SoftenFloatRes_FSUB(N); break;
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case ISD::FTRUNC: R = SoftenFloatRes_FTRUNC(N); break;
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case ISD::LOAD: R = SoftenFloatRes_LOAD(N); break;
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case ISD::SELECT: R = SoftenFloatRes_SELECT(N); break;
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case ISD::SELECT_CC: R = SoftenFloatRes_SELECT_CC(N); break;
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case ISD::UINT_TO_FP: R = SoftenFloatRes_XINT_TO_FP(N); break;
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case ISD::UNDEF: R = SoftenFloatRes_UNDEF(N); break;
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case ISD::VAARG: R = SoftenFloatRes_VAARG(N); break;
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// If R is null, the sub-method took care of registering the result.
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SetSoftenedFloat(SDValue(N, ResNo), R);
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SDValue DAGTypeLegalizer::SoftenFloatRes_BIT_CONVERT(SDNode *N) {
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return BitConvertToInteger(N->getOperand(0));
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SDValue DAGTypeLegalizer::SoftenFloatRes_BUILD_PAIR(SDNode *N) {
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// Convert the inputs to integers, and build a new pair out of them.
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return DAG.getNode(ISD::BUILD_PAIR, N->getDebugLoc(),
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TLI.getTypeToTransformTo(*DAG.getContext(),
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BitConvertToInteger(N->getOperand(0)),
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BitConvertToInteger(N->getOperand(1)));
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SDValue DAGTypeLegalizer::SoftenFloatRes_ConstantFP(ConstantFPSDNode *N) {
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return DAG.getConstant(N->getValueAPF().bitcastToAPInt(),
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TLI.getTypeToTransformTo(*DAG.getContext(),
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N->getValueType(0)));
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SDValue DAGTypeLegalizer::SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode *N) {
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SDValue NewOp = BitConvertVectorToIntegerVector(N->getOperand(0));
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return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, N->getDebugLoc(),
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NewOp.getValueType().getVectorElementType(),
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NewOp, N->getOperand(1));
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SDValue DAGTypeLegalizer::SoftenFloatRes_FABS(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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unsigned Size = NVT.getSizeInBits();
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// Mask = ~(1 << (Size-1))
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SDValue Mask = DAG.getConstant(APInt::getAllOnesValue(Size).clear(Size-1),
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SDValue Op = GetSoftenedFloat(N->getOperand(0));
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return DAG.getNode(ISD::AND, N->getDebugLoc(), NVT, Op, Mask);
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SDValue DAGTypeLegalizer::SoftenFloatRes_FADD(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
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GetSoftenedFloat(N->getOperand(1)) };
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return MakeLibCall(GetFPLibCall(N->getValueType(0),
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NVT, Ops, 2, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_FCEIL(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Op = GetSoftenedFloat(N->getOperand(0));
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return MakeLibCall(GetFPLibCall(N->getValueType(0),
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RTLIB::CEIL_PPCF128),
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NVT, &Op, 1, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_FCOPYSIGN(SDNode *N) {
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SDValue LHS = GetSoftenedFloat(N->getOperand(0));
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SDValue RHS = BitConvertToInteger(N->getOperand(1));
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DebugLoc dl = N->getDebugLoc();
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EVT LVT = LHS.getValueType();
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EVT RVT = RHS.getValueType();
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unsigned LSize = LVT.getSizeInBits();
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unsigned RSize = RVT.getSizeInBits();
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// First get the sign bit of second operand.
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SDValue SignBit = DAG.getNode(ISD::SHL, dl, RVT, DAG.getConstant(1, RVT),
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DAG.getConstant(RSize - 1,
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TLI.getShiftAmountTy()));
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SignBit = DAG.getNode(ISD::AND, dl, RVT, RHS, SignBit);
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// Shift right or sign-extend it if the two operands have different types.
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int SizeDiff = RVT.getSizeInBits() - LVT.getSizeInBits();
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SignBit = DAG.getNode(ISD::SRL, dl, RVT, SignBit,
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DAG.getConstant(SizeDiff, TLI.getShiftAmountTy()));
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SignBit = DAG.getNode(ISD::TRUNCATE, dl, LVT, SignBit);
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} else if (SizeDiff < 0) {
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SignBit = DAG.getNode(ISD::ANY_EXTEND, dl, LVT, SignBit);
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SignBit = DAG.getNode(ISD::SHL, dl, LVT, SignBit,
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DAG.getConstant(-SizeDiff, TLI.getShiftAmountTy()));
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// Clear the sign bit of the first operand.
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SDValue Mask = DAG.getNode(ISD::SHL, dl, LVT, DAG.getConstant(1, LVT),
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DAG.getConstant(LSize - 1,
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TLI.getShiftAmountTy()));
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Mask = DAG.getNode(ISD::SUB, dl, LVT, Mask, DAG.getConstant(1, LVT));
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LHS = DAG.getNode(ISD::AND, dl, LVT, LHS, Mask);
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// Or the value with the sign bit.
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return DAG.getNode(ISD::OR, dl, LVT, LHS, SignBit);
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SDValue DAGTypeLegalizer::SoftenFloatRes_FCOS(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Op = GetSoftenedFloat(N->getOperand(0));
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return MakeLibCall(GetFPLibCall(N->getValueType(0),
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NVT, &Op, 1, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_FDIV(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
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GetSoftenedFloat(N->getOperand(1)) };
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return MakeLibCall(GetFPLibCall(N->getValueType(0),
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NVT, Ops, 2, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Op = GetSoftenedFloat(N->getOperand(0));
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return MakeLibCall(GetFPLibCall(N->getValueType(0),
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NVT, &Op, 1, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP2(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Op = GetSoftenedFloat(N->getOperand(0));
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return MakeLibCall(GetFPLibCall(N->getValueType(0),
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RTLIB::EXP2_PPCF128),
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NVT, &Op, 1, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_FFLOOR(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Op = GetSoftenedFloat(N->getOperand(0));
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return MakeLibCall(GetFPLibCall(N->getValueType(0),
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RTLIB::FLOOR_PPCF128),
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NVT, &Op, 1, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Op = GetSoftenedFloat(N->getOperand(0));
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return MakeLibCall(GetFPLibCall(N->getValueType(0),
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NVT, &Op, 1, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG2(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Op = GetSoftenedFloat(N->getOperand(0));
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return MakeLibCall(GetFPLibCall(N->getValueType(0),
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RTLIB::LOG2_PPCF128),
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NVT, &Op, 1, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG10(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Op = GetSoftenedFloat(N->getOperand(0));
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return MakeLibCall(GetFPLibCall(N->getValueType(0),
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RTLIB::LOG10_PPCF128),
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NVT, &Op, 1, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_FMUL(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
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GetSoftenedFloat(N->getOperand(1)) };
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return MakeLibCall(GetFPLibCall(N->getValueType(0),
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NVT, Ops, 2, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_FNEARBYINT(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Op = GetSoftenedFloat(N->getOperand(0));
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return MakeLibCall(GetFPLibCall(N->getValueType(0),
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RTLIB::NEARBYINT_F32,
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RTLIB::NEARBYINT_F64,
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RTLIB::NEARBYINT_F80,
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RTLIB::NEARBYINT_PPCF128),
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NVT, &Op, 1, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_FNEG(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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// Expand Y = FNEG(X) -> Y = SUB -0.0, X
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SDValue Ops[2] = { DAG.getConstantFP(-0.0, N->getValueType(0)),
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GetSoftenedFloat(N->getOperand(0)) };
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return MakeLibCall(GetFPLibCall(N->getValueType(0),
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NVT, Ops, 2, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_FP_EXTEND(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Op = N->getOperand(0);
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RTLIB::Libcall LC = RTLIB::getFPEXT(Op.getValueType(), N->getValueType(0));
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assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_EXTEND!");
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return MakeLibCall(LC, NVT, &Op, 1, false, N->getDebugLoc());
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// FIXME: Should we just use 'normal' FP_EXTEND / FP_TRUNC instead of special
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SDValue DAGTypeLegalizer::SoftenFloatRes_FP16_TO_FP32(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Op = N->getOperand(0);
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return MakeLibCall(RTLIB::FPEXT_F16_F32, NVT, &Op, 1, false,
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SDValue DAGTypeLegalizer::SoftenFloatRes_FP_ROUND(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Op = N->getOperand(0);
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RTLIB::Libcall LC = RTLIB::getFPROUND(Op.getValueType(), N->getValueType(0));
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assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND!");
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return MakeLibCall(LC, NVT, &Op, 1, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_FPOW(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
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GetSoftenedFloat(N->getOperand(1)) };
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return MakeLibCall(GetFPLibCall(N->getValueType(0),
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NVT, Ops, 2, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_FPOWI(SDNode *N) {
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assert(N->getOperand(1).getValueType() == MVT::i32 &&
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"Unsupported power type!");
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), N->getOperand(1) };
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return MakeLibCall(GetFPLibCall(N->getValueType(0),
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RTLIB::POWI_PPCF128),
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NVT, Ops, 2, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_FREM(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
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GetSoftenedFloat(N->getOperand(1)) };
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return MakeLibCall(GetFPLibCall(N->getValueType(0),
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NVT, Ops, 2, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_FRINT(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Op = GetSoftenedFloat(N->getOperand(0));
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return MakeLibCall(GetFPLibCall(N->getValueType(0),
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RTLIB::RINT_PPCF128),
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NVT, &Op, 1, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_FSIN(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Op = GetSoftenedFloat(N->getOperand(0));
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return MakeLibCall(GetFPLibCall(N->getValueType(0),
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NVT, &Op, 1, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_FSQRT(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Op = GetSoftenedFloat(N->getOperand(0));
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return MakeLibCall(GetFPLibCall(N->getValueType(0),
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RTLIB::SQRT_PPCF128),
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NVT, &Op, 1, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_FSUB(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
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GetSoftenedFloat(N->getOperand(1)) };
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return MakeLibCall(GetFPLibCall(N->getValueType(0),
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NVT, Ops, 2, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_FTRUNC(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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SDValue Op = GetSoftenedFloat(N->getOperand(0));
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return MakeLibCall(GetFPLibCall(N->getValueType(0),
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RTLIB::TRUNC_PPCF128),
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NVT, &Op, 1, false, N->getDebugLoc());
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SDValue DAGTypeLegalizer::SoftenFloatRes_LOAD(SDNode *N) {
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LoadSDNode *L = cast<LoadSDNode>(N);
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EVT VT = N->getValueType(0);
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
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DebugLoc dl = N->getDebugLoc();
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if (L->getExtensionType() == ISD::NON_EXTLOAD) {
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NewL = DAG.getLoad(L->getAddressingMode(), L->getExtensionType(),
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NVT, dl, L->getChain(), L->getBasePtr(), L->getOffset(),
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L->getSrcValue(), L->getSrcValueOffset(), NVT,
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L->isVolatile(), L->isNonTemporal(), L->getAlignment());
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// Legalized the chain result - switch anything that used the old chain to
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ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
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// Do a non-extending load followed by FP_EXTEND.
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NewL = DAG.getLoad(L->getAddressingMode(), ISD::NON_EXTLOAD,
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L->getMemoryVT(), dl, L->getChain(),
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L->getBasePtr(), L->getOffset(),
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L->getSrcValue(), L->getSrcValueOffset(),
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L->getMemoryVT(), L->isVolatile(),
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L->isNonTemporal(), L->getAlignment());
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// Legalized the chain result - switch anything that used the old chain to
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ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
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return BitConvertToInteger(DAG.getNode(ISD::FP_EXTEND, dl, VT, NewL));
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SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT(SDNode *N) {
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SDValue LHS = GetSoftenedFloat(N->getOperand(1));
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SDValue RHS = GetSoftenedFloat(N->getOperand(2));
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return DAG.getNode(ISD::SELECT, N->getDebugLoc(),
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LHS.getValueType(), N->getOperand(0),LHS,RHS);
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SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT_CC(SDNode *N) {
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SDValue LHS = GetSoftenedFloat(N->getOperand(2));
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SDValue RHS = GetSoftenedFloat(N->getOperand(3));
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return DAG.getNode(ISD::SELECT_CC, N->getDebugLoc(),
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LHS.getValueType(), N->getOperand(0),
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N->getOperand(1), LHS, RHS, N->getOperand(4));
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SDValue DAGTypeLegalizer::SoftenFloatRes_UNDEF(SDNode *N) {
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return DAG.getUNDEF(TLI.getTypeToTransformTo(*DAG.getContext(),
496
N->getValueType(0)));
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SDValue DAGTypeLegalizer::SoftenFloatRes_VAARG(SDNode *N) {
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SDValue Chain = N->getOperand(0); // Get the chain.
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SDValue Ptr = N->getOperand(1); // Get the pointer.
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EVT VT = N->getValueType(0);
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
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DebugLoc dl = N->getDebugLoc();
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NewVAARG = DAG.getVAArg(NVT, dl, Chain, Ptr, N->getOperand(2),
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N->getConstantOperandVal(3));
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// Legalized the chain result - switch anything that used the old chain to
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ReplaceValueWith(SDValue(N, 1), NewVAARG.getValue(1));
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SDValue DAGTypeLegalizer::SoftenFloatRes_XINT_TO_FP(SDNode *N) {
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bool Signed = N->getOpcode() == ISD::SINT_TO_FP;
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EVT SVT = N->getOperand(0).getValueType();
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EVT RVT = N->getValueType(0);
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DebugLoc dl = N->getDebugLoc();
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// If the input is not legal, eg: i1 -> fp, then it needs to be promoted to
524
// a larger type, eg: i8 -> fp. Even if it is legal, no libcall may exactly
525
// match. Look for an appropriate libcall.
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RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
527
for (unsigned t = MVT::FIRST_INTEGER_VALUETYPE;
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t <= MVT::LAST_INTEGER_VALUETYPE && LC == RTLIB::UNKNOWN_LIBCALL; ++t) {
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NVT = (MVT::SimpleValueType)t;
530
// The source needs to big enough to hold the operand.
532
LC = Signed ? RTLIB::getSINTTOFP(NVT, RVT):RTLIB::getUINTTOFP (NVT, RVT);
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assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
536
// Sign/zero extend the argument if the libcall takes a larger type.
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SDValue Op = DAG.getNode(Signed ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
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NVT, N->getOperand(0));
539
return MakeLibCall(LC, TLI.getTypeToTransformTo(*DAG.getContext(), RVT),
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//===----------------------------------------------------------------------===//
545
// Operand Float to Integer Conversion..
546
//===----------------------------------------------------------------------===//
548
bool DAGTypeLegalizer::SoftenFloatOperand(SDNode *N, unsigned OpNo) {
549
DEBUG(dbgs() << "Soften float operand " << OpNo << ": "; N->dump(&DAG);
551
SDValue Res = SDValue();
553
switch (N->getOpcode()) {
556
dbgs() << "SoftenFloatOperand Op #" << OpNo << ": ";
557
N->dump(&DAG); dbgs() << "\n";
559
llvm_unreachable("Do not know how to soften this operator's operand!");
561
case ISD::BIT_CONVERT: Res = SoftenFloatOp_BIT_CONVERT(N); break;
562
case ISD::BR_CC: Res = SoftenFloatOp_BR_CC(N); break;
563
case ISD::FP_ROUND: Res = SoftenFloatOp_FP_ROUND(N); break;
564
case ISD::FP_TO_SINT: Res = SoftenFloatOp_FP_TO_SINT(N); break;
565
case ISD::FP_TO_UINT: Res = SoftenFloatOp_FP_TO_UINT(N); break;
566
case ISD::FP32_TO_FP16:Res = SoftenFloatOp_FP32_TO_FP16(N); break;
567
case ISD::SELECT_CC: Res = SoftenFloatOp_SELECT_CC(N); break;
568
case ISD::SETCC: Res = SoftenFloatOp_SETCC(N); break;
569
case ISD::STORE: Res = SoftenFloatOp_STORE(N, OpNo); break;
572
// If the result is null, the sub-method took care of registering results etc.
573
if (!Res.getNode()) return false;
575
// If the result is N, the sub-method updated N in place. Tell the legalizer
577
if (Res.getNode() == N)
580
assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
581
"Invalid operand expansion");
583
ReplaceValueWith(SDValue(N, 0), Res);
587
/// SoftenSetCCOperands - Soften the operands of a comparison. This code is
588
/// shared among BR_CC, SELECT_CC, and SETCC handlers.
589
void DAGTypeLegalizer::SoftenSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
590
ISD::CondCode &CCCode, DebugLoc dl) {
591
SDValue LHSInt = GetSoftenedFloat(NewLHS);
592
SDValue RHSInt = GetSoftenedFloat(NewRHS);
593
EVT VT = NewLHS.getValueType();
595
assert((VT == MVT::f32 || VT == MVT::f64) && "Unsupported setcc type!");
597
// Expand into one or more soft-fp libcall(s).
598
RTLIB::Libcall LC1 = RTLIB::UNKNOWN_LIBCALL, LC2 = RTLIB::UNKNOWN_LIBCALL;
602
LC1 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
606
LC1 = (VT == MVT::f32) ? RTLIB::UNE_F32 : RTLIB::UNE_F64;
610
LC1 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
614
LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
618
LC1 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
622
LC1 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
625
LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
628
LC1 = (VT == MVT::f32) ? RTLIB::O_F32 : RTLIB::O_F64;
631
LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
634
// SETONE = SETOLT | SETOGT
635
LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
638
LC2 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
641
LC2 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
644
LC2 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
647
LC2 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
650
LC2 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
652
default: assert(false && "Do not know how to soften this setcc!");
656
// Use the target specific return value for comparions lib calls.
657
EVT RetVT = TLI.getCmpLibcallReturnType();
658
SDValue Ops[2] = { LHSInt, RHSInt };
659
NewLHS = MakeLibCall(LC1, RetVT, Ops, 2, false/*sign irrelevant*/, dl);
660
NewRHS = DAG.getConstant(0, RetVT);
661
CCCode = TLI.getCmpLibcallCC(LC1);
662
if (LC2 != RTLIB::UNKNOWN_LIBCALL) {
663
SDValue Tmp = DAG.getNode(ISD::SETCC, dl, TLI.getSetCCResultType(RetVT),
664
NewLHS, NewRHS, DAG.getCondCode(CCCode));
665
NewLHS = MakeLibCall(LC2, RetVT, Ops, 2, false/*sign irrelevant*/, dl);
666
NewLHS = DAG.getNode(ISD::SETCC, dl, TLI.getSetCCResultType(RetVT), NewLHS,
667
NewRHS, DAG.getCondCode(TLI.getCmpLibcallCC(LC2)));
668
NewLHS = DAG.getNode(ISD::OR, dl, Tmp.getValueType(), Tmp, NewLHS);
673
SDValue DAGTypeLegalizer::SoftenFloatOp_BIT_CONVERT(SDNode *N) {
674
return DAG.getNode(ISD::BIT_CONVERT, N->getDebugLoc(), N->getValueType(0),
675
GetSoftenedFloat(N->getOperand(0)));
678
SDValue DAGTypeLegalizer::SoftenFloatOp_FP_ROUND(SDNode *N) {
679
EVT SVT = N->getOperand(0).getValueType();
680
EVT RVT = N->getValueType(0);
682
RTLIB::Libcall LC = RTLIB::getFPROUND(SVT, RVT);
683
assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND libcall");
685
SDValue Op = GetSoftenedFloat(N->getOperand(0));
686
return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
689
SDValue DAGTypeLegalizer::SoftenFloatOp_BR_CC(SDNode *N) {
690
SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
691
ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
692
SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
694
// If SoftenSetCCOperands returned a scalar, we need to compare the result
695
// against zero to select between true and false values.
696
if (NewRHS.getNode() == 0) {
697
NewRHS = DAG.getConstant(0, NewLHS.getValueType());
701
// Update N to have the operands specified.
702
return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
703
DAG.getCondCode(CCCode), NewLHS, NewRHS,
708
SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_SINT(SDNode *N) {
709
EVT RVT = N->getValueType(0);
710
RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
711
assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
712
SDValue Op = GetSoftenedFloat(N->getOperand(0));
713
return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
716
SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_UINT(SDNode *N) {
717
EVT RVT = N->getValueType(0);
718
RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
719
assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
720
SDValue Op = GetSoftenedFloat(N->getOperand(0));
721
return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
724
SDValue DAGTypeLegalizer::SoftenFloatOp_FP32_TO_FP16(SDNode *N) {
725
EVT RVT = N->getValueType(0);
726
RTLIB::Libcall LC = RTLIB::FPROUND_F32_F16;
727
SDValue Op = GetSoftenedFloat(N->getOperand(0));
728
return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
731
SDValue DAGTypeLegalizer::SoftenFloatOp_SELECT_CC(SDNode *N) {
732
SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
733
ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
734
SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
736
// If SoftenSetCCOperands returned a scalar, we need to compare the result
737
// against zero to select between true and false values.
738
if (NewRHS.getNode() == 0) {
739
NewRHS = DAG.getConstant(0, NewLHS.getValueType());
743
// Update N to have the operands specified.
744
return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
745
N->getOperand(2), N->getOperand(3),
746
DAG.getCondCode(CCCode)),
750
SDValue DAGTypeLegalizer::SoftenFloatOp_SETCC(SDNode *N) {
751
SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
752
ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
753
SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
755
// If SoftenSetCCOperands returned a scalar, use it.
756
if (NewRHS.getNode() == 0) {
757
assert(NewLHS.getValueType() == N->getValueType(0) &&
758
"Unexpected setcc expansion!");
762
// Otherwise, update N to have the operands specified.
763
return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
764
DAG.getCondCode(CCCode)),
768
SDValue DAGTypeLegalizer::SoftenFloatOp_STORE(SDNode *N, unsigned OpNo) {
769
assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
770
assert(OpNo == 1 && "Can only soften the stored value!");
771
StoreSDNode *ST = cast<StoreSDNode>(N);
772
SDValue Val = ST->getValue();
773
DebugLoc dl = N->getDebugLoc();
775
if (ST->isTruncatingStore())
776
// Do an FP_ROUND followed by a non-truncating store.
777
Val = BitConvertToInteger(DAG.getNode(ISD::FP_ROUND, dl, ST->getMemoryVT(),
778
Val, DAG.getIntPtrConstant(0)));
780
Val = GetSoftenedFloat(Val);
782
return DAG.getStore(ST->getChain(), dl, Val, ST->getBasePtr(),
783
ST->getSrcValue(), ST->getSrcValueOffset(),
784
ST->isVolatile(), ST->isNonTemporal(),
789
//===----------------------------------------------------------------------===//
790
// Float Result Expansion
791
//===----------------------------------------------------------------------===//
793
/// ExpandFloatResult - This method is called when the specified result of the
794
/// specified node is found to need expansion. At this point, the node may also
795
/// have invalid operands or may have other results that need promotion, we just
796
/// know that (at least) one result needs expansion.
797
void DAGTypeLegalizer::ExpandFloatResult(SDNode *N, unsigned ResNo) {
798
DEBUG(dbgs() << "Expand float result: "; N->dump(&DAG); dbgs() << "\n");
802
// See if the target wants to custom expand this node.
803
if (CustomLowerNode(N, N->getValueType(ResNo), true))
806
switch (N->getOpcode()) {
809
dbgs() << "ExpandFloatResult #" << ResNo << ": ";
810
N->dump(&DAG); dbgs() << "\n";
812
llvm_unreachable("Do not know how to expand the result of this operator!");
814
case ISD::MERGE_VALUES: SplitRes_MERGE_VALUES(N, Lo, Hi); break;
815
case ISD::UNDEF: SplitRes_UNDEF(N, Lo, Hi); break;
816
case ISD::SELECT: SplitRes_SELECT(N, Lo, Hi); break;
817
case ISD::SELECT_CC: SplitRes_SELECT_CC(N, Lo, Hi); break;
819
case ISD::BIT_CONVERT: ExpandRes_BIT_CONVERT(N, Lo, Hi); break;
820
case ISD::BUILD_PAIR: ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
821
case ISD::EXTRACT_ELEMENT: ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
822
case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
823
case ISD::VAARG: ExpandRes_VAARG(N, Lo, Hi); break;
825
case ISD::ConstantFP: ExpandFloatRes_ConstantFP(N, Lo, Hi); break;
826
case ISD::FABS: ExpandFloatRes_FABS(N, Lo, Hi); break;
827
case ISD::FADD: ExpandFloatRes_FADD(N, Lo, Hi); break;
828
case ISD::FCEIL: ExpandFloatRes_FCEIL(N, Lo, Hi); break;
829
case ISD::FCOPYSIGN: ExpandFloatRes_FCOPYSIGN(N, Lo, Hi); break;
830
case ISD::FCOS: ExpandFloatRes_FCOS(N, Lo, Hi); break;
831
case ISD::FDIV: ExpandFloatRes_FDIV(N, Lo, Hi); break;
832
case ISD::FEXP: ExpandFloatRes_FEXP(N, Lo, Hi); break;
833
case ISD::FEXP2: ExpandFloatRes_FEXP2(N, Lo, Hi); break;
834
case ISD::FFLOOR: ExpandFloatRes_FFLOOR(N, Lo, Hi); break;
835
case ISD::FLOG: ExpandFloatRes_FLOG(N, Lo, Hi); break;
836
case ISD::FLOG2: ExpandFloatRes_FLOG2(N, Lo, Hi); break;
837
case ISD::FLOG10: ExpandFloatRes_FLOG10(N, Lo, Hi); break;
838
case ISD::FMUL: ExpandFloatRes_FMUL(N, Lo, Hi); break;
839
case ISD::FNEARBYINT: ExpandFloatRes_FNEARBYINT(N, Lo, Hi); break;
840
case ISD::FNEG: ExpandFloatRes_FNEG(N, Lo, Hi); break;
841
case ISD::FP_EXTEND: ExpandFloatRes_FP_EXTEND(N, Lo, Hi); break;
842
case ISD::FPOW: ExpandFloatRes_FPOW(N, Lo, Hi); break;
843
case ISD::FPOWI: ExpandFloatRes_FPOWI(N, Lo, Hi); break;
844
case ISD::FRINT: ExpandFloatRes_FRINT(N, Lo, Hi); break;
845
case ISD::FSIN: ExpandFloatRes_FSIN(N, Lo, Hi); break;
846
case ISD::FSQRT: ExpandFloatRes_FSQRT(N, Lo, Hi); break;
847
case ISD::FSUB: ExpandFloatRes_FSUB(N, Lo, Hi); break;
848
case ISD::FTRUNC: ExpandFloatRes_FTRUNC(N, Lo, Hi); break;
849
case ISD::LOAD: ExpandFloatRes_LOAD(N, Lo, Hi); break;
850
case ISD::SINT_TO_FP:
851
case ISD::UINT_TO_FP: ExpandFloatRes_XINT_TO_FP(N, Lo, Hi); break;
854
// If Lo/Hi is null, the sub-method took care of registering results etc.
856
SetExpandedFloat(SDValue(N, ResNo), Lo, Hi);
859
void DAGTypeLegalizer::ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo,
861
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
862
assert(NVT.getSizeInBits() == integerPartWidth &&
863
"Do not know how to expand this float constant!");
864
APInt C = cast<ConstantFPSDNode>(N)->getValueAPF().bitcastToAPInt();
865
Lo = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1,
866
&C.getRawData()[1])), NVT);
867
Hi = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1,
868
&C.getRawData()[0])), NVT);
871
void DAGTypeLegalizer::ExpandFloatRes_FABS(SDNode *N, SDValue &Lo,
873
assert(N->getValueType(0) == MVT::ppcf128 &&
874
"Logic only correct for ppcf128!");
875
DebugLoc dl = N->getDebugLoc();
877
GetExpandedFloat(N->getOperand(0), Lo, Tmp);
878
Hi = DAG.getNode(ISD::FABS, dl, Tmp.getValueType(), Tmp);
879
// Lo = Hi==fabs(Hi) ? Lo : -Lo;
880
Lo = DAG.getNode(ISD::SELECT_CC, dl, Lo.getValueType(), Tmp, Hi, Lo,
881
DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo),
882
DAG.getCondCode(ISD::SETEQ));
885
void DAGTypeLegalizer::ExpandFloatRes_FADD(SDNode *N, SDValue &Lo,
887
SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
888
RTLIB::ADD_F32, RTLIB::ADD_F64,
889
RTLIB::ADD_F80, RTLIB::ADD_PPCF128),
891
GetPairElements(Call, Lo, Hi);
894
void DAGTypeLegalizer::ExpandFloatRes_FCEIL(SDNode *N,
895
SDValue &Lo, SDValue &Hi) {
896
SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
897
RTLIB::CEIL_F32, RTLIB::CEIL_F64,
898
RTLIB::CEIL_F80, RTLIB::CEIL_PPCF128),
900
GetPairElements(Call, Lo, Hi);
903
void DAGTypeLegalizer::ExpandFloatRes_FCOPYSIGN(SDNode *N,
904
SDValue &Lo, SDValue &Hi) {
905
SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
909
RTLIB::COPYSIGN_PPCF128),
911
GetPairElements(Call, Lo, Hi);
914
void DAGTypeLegalizer::ExpandFloatRes_FCOS(SDNode *N,
915
SDValue &Lo, SDValue &Hi) {
916
SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
917
RTLIB::COS_F32, RTLIB::COS_F64,
918
RTLIB::COS_F80, RTLIB::COS_PPCF128),
920
GetPairElements(Call, Lo, Hi);
923
void DAGTypeLegalizer::ExpandFloatRes_FDIV(SDNode *N, SDValue &Lo,
925
SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
926
SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
931
N->getValueType(0), Ops, 2, false,
933
GetPairElements(Call, Lo, Hi);
936
void DAGTypeLegalizer::ExpandFloatRes_FEXP(SDNode *N,
937
SDValue &Lo, SDValue &Hi) {
938
SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
939
RTLIB::EXP_F32, RTLIB::EXP_F64,
940
RTLIB::EXP_F80, RTLIB::EXP_PPCF128),
942
GetPairElements(Call, Lo, Hi);
945
void DAGTypeLegalizer::ExpandFloatRes_FEXP2(SDNode *N,
946
SDValue &Lo, SDValue &Hi) {
947
SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
948
RTLIB::EXP2_F32, RTLIB::EXP2_F64,
949
RTLIB::EXP2_F80, RTLIB::EXP2_PPCF128),
951
GetPairElements(Call, Lo, Hi);
954
void DAGTypeLegalizer::ExpandFloatRes_FFLOOR(SDNode *N,
955
SDValue &Lo, SDValue &Hi) {
956
SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
957
RTLIB::FLOOR_F32,RTLIB::FLOOR_F64,
958
RTLIB::FLOOR_F80,RTLIB::FLOOR_PPCF128),
960
GetPairElements(Call, Lo, Hi);
963
void DAGTypeLegalizer::ExpandFloatRes_FLOG(SDNode *N,
964
SDValue &Lo, SDValue &Hi) {
965
SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
966
RTLIB::LOG_F32, RTLIB::LOG_F64,
967
RTLIB::LOG_F80, RTLIB::LOG_PPCF128),
969
GetPairElements(Call, Lo, Hi);
972
void DAGTypeLegalizer::ExpandFloatRes_FLOG2(SDNode *N,
973
SDValue &Lo, SDValue &Hi) {
974
SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
975
RTLIB::LOG2_F32, RTLIB::LOG2_F64,
976
RTLIB::LOG2_F80, RTLIB::LOG2_PPCF128),
978
GetPairElements(Call, Lo, Hi);
981
void DAGTypeLegalizer::ExpandFloatRes_FLOG10(SDNode *N,
982
SDValue &Lo, SDValue &Hi) {
983
SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
984
RTLIB::LOG10_F32,RTLIB::LOG10_F64,
985
RTLIB::LOG10_F80,RTLIB::LOG10_PPCF128),
987
GetPairElements(Call, Lo, Hi);
990
void DAGTypeLegalizer::ExpandFloatRes_FMUL(SDNode *N, SDValue &Lo,
992
SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
993
SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
998
N->getValueType(0), Ops, 2, false,
1000
GetPairElements(Call, Lo, Hi);
1003
void DAGTypeLegalizer::ExpandFloatRes_FNEARBYINT(SDNode *N,
1004
SDValue &Lo, SDValue &Hi) {
1005
SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1006
RTLIB::NEARBYINT_F32,
1007
RTLIB::NEARBYINT_F64,
1008
RTLIB::NEARBYINT_F80,
1009
RTLIB::NEARBYINT_PPCF128),
1011
GetPairElements(Call, Lo, Hi);
1014
void DAGTypeLegalizer::ExpandFloatRes_FNEG(SDNode *N, SDValue &Lo,
1016
DebugLoc dl = N->getDebugLoc();
1017
GetExpandedFloat(N->getOperand(0), Lo, Hi);
1018
Lo = DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo);
1019
Hi = DAG.getNode(ISD::FNEG, dl, Hi.getValueType(), Hi);
1022
void DAGTypeLegalizer::ExpandFloatRes_FP_EXTEND(SDNode *N, SDValue &Lo,
1024
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1025
Hi = DAG.getNode(ISD::FP_EXTEND, N->getDebugLoc(), NVT, N->getOperand(0));
1026
Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1029
void DAGTypeLegalizer::ExpandFloatRes_FPOW(SDNode *N,
1030
SDValue &Lo, SDValue &Hi) {
1031
SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1032
RTLIB::POW_F32, RTLIB::POW_F64,
1033
RTLIB::POW_F80, RTLIB::POW_PPCF128),
1035
GetPairElements(Call, Lo, Hi);
1038
void DAGTypeLegalizer::ExpandFloatRes_FPOWI(SDNode *N,
1039
SDValue &Lo, SDValue &Hi) {
1040
SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1041
RTLIB::POWI_F32, RTLIB::POWI_F64,
1042
RTLIB::POWI_F80, RTLIB::POWI_PPCF128),
1044
GetPairElements(Call, Lo, Hi);
1047
void DAGTypeLegalizer::ExpandFloatRes_FRINT(SDNode *N,
1048
SDValue &Lo, SDValue &Hi) {
1049
SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1050
RTLIB::RINT_F32, RTLIB::RINT_F64,
1051
RTLIB::RINT_F80, RTLIB::RINT_PPCF128),
1053
GetPairElements(Call, Lo, Hi);
1056
void DAGTypeLegalizer::ExpandFloatRes_FSIN(SDNode *N,
1057
SDValue &Lo, SDValue &Hi) {
1058
SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1059
RTLIB::SIN_F32, RTLIB::SIN_F64,
1060
RTLIB::SIN_F80, RTLIB::SIN_PPCF128),
1062
GetPairElements(Call, Lo, Hi);
1065
void DAGTypeLegalizer::ExpandFloatRes_FSQRT(SDNode *N,
1066
SDValue &Lo, SDValue &Hi) {
1067
SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1068
RTLIB::SQRT_F32, RTLIB::SQRT_F64,
1069
RTLIB::SQRT_F80, RTLIB::SQRT_PPCF128),
1071
GetPairElements(Call, Lo, Hi);
1074
void DAGTypeLegalizer::ExpandFloatRes_FSUB(SDNode *N, SDValue &Lo,
1076
SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1077
SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
1081
RTLIB::SUB_PPCF128),
1082
N->getValueType(0), Ops, 2, false,
1084
GetPairElements(Call, Lo, Hi);
1087
void DAGTypeLegalizer::ExpandFloatRes_FTRUNC(SDNode *N,
1088
SDValue &Lo, SDValue &Hi) {
1089
SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1090
RTLIB::TRUNC_F32, RTLIB::TRUNC_F64,
1091
RTLIB::TRUNC_F80, RTLIB::TRUNC_PPCF128),
1093
GetPairElements(Call, Lo, Hi);
1096
void DAGTypeLegalizer::ExpandFloatRes_LOAD(SDNode *N, SDValue &Lo,
1098
if (ISD::isNormalLoad(N)) {
1099
ExpandRes_NormalLoad(N, Lo, Hi);
1103
assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
1104
LoadSDNode *LD = cast<LoadSDNode>(N);
1105
SDValue Chain = LD->getChain();
1106
SDValue Ptr = LD->getBasePtr();
1107
DebugLoc dl = N->getDebugLoc();
1109
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), LD->getValueType(0));
1110
assert(NVT.isByteSized() && "Expanded type not byte sized!");
1111
assert(LD->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1113
Hi = DAG.getExtLoad(LD->getExtensionType(), NVT, dl, Chain, Ptr,
1114
LD->getSrcValue(), LD->getSrcValueOffset(),
1115
LD->getMemoryVT(), LD->isVolatile(),
1116
LD->isNonTemporal(), LD->getAlignment());
1118
// Remember the chain.
1119
Chain = Hi.getValue(1);
1121
// The low part is zero.
1122
Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1124
// Modified the chain - switch anything that used the old chain to use the
1126
ReplaceValueWith(SDValue(LD, 1), Chain);
1129
void DAGTypeLegalizer::ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo,
1131
assert(N->getValueType(0) == MVT::ppcf128 && "Unsupported XINT_TO_FP!");
1132
EVT VT = N->getValueType(0);
1133
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1134
SDValue Src = N->getOperand(0);
1135
EVT SrcVT = Src.getValueType();
1136
bool isSigned = N->getOpcode() == ISD::SINT_TO_FP;
1137
DebugLoc dl = N->getDebugLoc();
1139
// First do an SINT_TO_FP, whether the original was signed or unsigned.
1140
// When promoting partial word types to i32 we must honor the signedness,
1142
if (SrcVT.bitsLE(MVT::i32)) {
1143
// The integer can be represented exactly in an f64.
1144
Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1146
Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1147
Hi = DAG.getNode(ISD::SINT_TO_FP, dl, NVT, Src);
1149
RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1150
if (SrcVT.bitsLE(MVT::i64)) {
1151
Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1153
LC = RTLIB::SINTTOFP_I64_PPCF128;
1154
} else if (SrcVT.bitsLE(MVT::i128)) {
1155
Src = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i128, Src);
1156
LC = RTLIB::SINTTOFP_I128_PPCF128;
1158
assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
1160
Hi = MakeLibCall(LC, VT, &Src, 1, true, dl);
1161
GetPairElements(Hi, Lo, Hi);
1167
// Unsigned - fix up the SINT_TO_FP value just calculated.
1168
Hi = DAG.getNode(ISD::BUILD_PAIR, dl, VT, Lo, Hi);
1169
SrcVT = Src.getValueType();
1171
// x>=0 ? (ppcf128)(iN)x : (ppcf128)(iN)x + 2^N; N=32,64,128.
1172
static const uint64_t TwoE32[] = { 0x41f0000000000000LL, 0 };
1173
static const uint64_t TwoE64[] = { 0x43f0000000000000LL, 0 };
1174
static const uint64_t TwoE128[] = { 0x47f0000000000000LL, 0 };
1175
const uint64_t *Parts = 0;
1177
switch (SrcVT.getSimpleVT().SimpleTy) {
1179
assert(false && "Unsupported UINT_TO_FP!");
1191
Lo = DAG.getNode(ISD::FADD, dl, VT, Hi,
1192
DAG.getConstantFP(APFloat(APInt(128, 2, Parts)),
1194
Lo = DAG.getNode(ISD::SELECT_CC, dl, VT, Src, DAG.getConstant(0, SrcVT),
1195
Lo, Hi, DAG.getCondCode(ISD::SETLT));
1196
GetPairElements(Lo, Lo, Hi);
1200
//===----------------------------------------------------------------------===//
1201
// Float Operand Expansion
1202
//===----------------------------------------------------------------------===//
1204
/// ExpandFloatOperand - This method is called when the specified operand of the
1205
/// specified node is found to need expansion. At this point, all of the result
1206
/// types of the node are known to be legal, but other operands of the node may
1207
/// need promotion or expansion as well as the specified one.
1208
bool DAGTypeLegalizer::ExpandFloatOperand(SDNode *N, unsigned OpNo) {
1209
DEBUG(dbgs() << "Expand float operand: "; N->dump(&DAG); dbgs() << "\n");
1210
SDValue Res = SDValue();
1212
if (TLI.getOperationAction(N->getOpcode(), N->getOperand(OpNo).getValueType())
1213
== TargetLowering::Custom)
1214
Res = TLI.LowerOperation(SDValue(N, 0), DAG);
1216
if (Res.getNode() == 0) {
1217
switch (N->getOpcode()) {
1220
dbgs() << "ExpandFloatOperand Op #" << OpNo << ": ";
1221
N->dump(&DAG); dbgs() << "\n";
1223
llvm_unreachable("Do not know how to expand this operator's operand!");
1225
case ISD::BIT_CONVERT: Res = ExpandOp_BIT_CONVERT(N); break;
1226
case ISD::BUILD_VECTOR: Res = ExpandOp_BUILD_VECTOR(N); break;
1227
case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break;
1229
case ISD::BR_CC: Res = ExpandFloatOp_BR_CC(N); break;
1230
case ISD::FP_ROUND: Res = ExpandFloatOp_FP_ROUND(N); break;
1231
case ISD::FP_TO_SINT: Res = ExpandFloatOp_FP_TO_SINT(N); break;
1232
case ISD::FP_TO_UINT: Res = ExpandFloatOp_FP_TO_UINT(N); break;
1233
case ISD::SELECT_CC: Res = ExpandFloatOp_SELECT_CC(N); break;
1234
case ISD::SETCC: Res = ExpandFloatOp_SETCC(N); break;
1235
case ISD::STORE: Res = ExpandFloatOp_STORE(cast<StoreSDNode>(N),
1240
// If the result is null, the sub-method took care of registering results etc.
1241
if (!Res.getNode()) return false;
1243
// If the result is N, the sub-method updated N in place. Tell the legalizer
1245
if (Res.getNode() == N)
1248
assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
1249
"Invalid operand expansion");
1251
ReplaceValueWith(SDValue(N, 0), Res);
1255
/// FloatExpandSetCCOperands - Expand the operands of a comparison. This code
1256
/// is shared among BR_CC, SELECT_CC, and SETCC handlers.
1257
void DAGTypeLegalizer::FloatExpandSetCCOperands(SDValue &NewLHS,
1259
ISD::CondCode &CCCode,
1261
SDValue LHSLo, LHSHi, RHSLo, RHSHi;
1262
GetExpandedFloat(NewLHS, LHSLo, LHSHi);
1263
GetExpandedFloat(NewRHS, RHSLo, RHSHi);
1265
EVT VT = NewLHS.getValueType();
1266
assert(VT == MVT::ppcf128 && "Unsupported setcc type!");
1268
// FIXME: This generated code sucks. We want to generate
1269
// FCMPU crN, hi1, hi2
1271
// FCMPU crN, lo1, lo2
1272
// The following can be improved, but not that much.
1273
SDValue Tmp1, Tmp2, Tmp3;
1274
Tmp1 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
1275
LHSHi, RHSHi, ISD::SETOEQ);
1276
Tmp2 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSLo.getValueType()),
1277
LHSLo, RHSLo, CCCode);
1278
Tmp3 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1279
Tmp1 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
1280
LHSHi, RHSHi, ISD::SETUNE);
1281
Tmp2 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
1282
LHSHi, RHSHi, CCCode);
1283
Tmp1 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1284
NewLHS = DAG.getNode(ISD::OR, dl, Tmp1.getValueType(), Tmp1, Tmp3);
1285
NewRHS = SDValue(); // LHS is the result, not a compare.
1288
SDValue DAGTypeLegalizer::ExpandFloatOp_BR_CC(SDNode *N) {
1289
SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
1290
ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
1291
FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
1293
// If ExpandSetCCOperands returned a scalar, we need to compare the result
1294
// against zero to select between true and false values.
1295
if (NewRHS.getNode() == 0) {
1296
NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1297
CCCode = ISD::SETNE;
1300
// Update N to have the operands specified.
1301
return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
1302
DAG.getCondCode(CCCode), NewLHS, NewRHS,
1303
N->getOperand(4)), 0);
1306
SDValue DAGTypeLegalizer::ExpandFloatOp_FP_ROUND(SDNode *N) {
1307
assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1308
"Logic only correct for ppcf128!");
1310
GetExpandedFloat(N->getOperand(0), Lo, Hi);
1311
// Round it the rest of the way (e.g. to f32) if needed.
1312
return DAG.getNode(ISD::FP_ROUND, N->getDebugLoc(),
1313
N->getValueType(0), Hi, N->getOperand(1));
1316
SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_SINT(SDNode *N) {
1317
EVT RVT = N->getValueType(0);
1318
DebugLoc dl = N->getDebugLoc();
1320
// Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1321
// PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1322
if (RVT == MVT::i32) {
1323
assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1324
"Logic only correct for ppcf128!");
1325
SDValue Res = DAG.getNode(ISD::FP_ROUND_INREG, dl, MVT::ppcf128,
1326
N->getOperand(0), DAG.getValueType(MVT::f64));
1327
Res = DAG.getNode(ISD::FP_ROUND, dl, MVT::f64, Res,
1328
DAG.getIntPtrConstant(1));
1329
return DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32, Res);
1332
RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
1333
assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
1334
return MakeLibCall(LC, RVT, &N->getOperand(0), 1, false, dl);
1337
SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_UINT(SDNode *N) {
1338
EVT RVT = N->getValueType(0);
1339
DebugLoc dl = N->getDebugLoc();
1341
// Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1342
// PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1343
if (RVT == MVT::i32) {
1344
assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1345
"Logic only correct for ppcf128!");
1346
const uint64_t TwoE31[] = {0x41e0000000000000LL, 0};
1347
APFloat APF = APFloat(APInt(128, 2, TwoE31));
1348
SDValue Tmp = DAG.getConstantFP(APF, MVT::ppcf128);
1349
// X>=2^31 ? (int)(X-2^31)+0x80000000 : (int)X
1350
// FIXME: generated code sucks.
1351
return DAG.getNode(ISD::SELECT_CC, dl, MVT::i32, N->getOperand(0), Tmp,
1352
DAG.getNode(ISD::ADD, dl, MVT::i32,
1353
DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32,
1354
DAG.getNode(ISD::FSUB, dl,
1358
DAG.getConstant(0x80000000, MVT::i32)),
1359
DAG.getNode(ISD::FP_TO_SINT, dl,
1360
MVT::i32, N->getOperand(0)),
1361
DAG.getCondCode(ISD::SETGE));
1364
RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
1365
assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
1366
return MakeLibCall(LC, N->getValueType(0), &N->getOperand(0), 1, false, dl);
1369
SDValue DAGTypeLegalizer::ExpandFloatOp_SELECT_CC(SDNode *N) {
1370
SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1371
ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
1372
FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
1374
// If ExpandSetCCOperands returned a scalar, we need to compare the result
1375
// against zero to select between true and false values.
1376
if (NewRHS.getNode() == 0) {
1377
NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1378
CCCode = ISD::SETNE;
1381
// Update N to have the operands specified.
1382
return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
1383
N->getOperand(2), N->getOperand(3),
1384
DAG.getCondCode(CCCode)), 0);
1387
SDValue DAGTypeLegalizer::ExpandFloatOp_SETCC(SDNode *N) {
1388
SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1389
ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
1390
FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
1392
// If ExpandSetCCOperands returned a scalar, use it.
1393
if (NewRHS.getNode() == 0) {
1394
assert(NewLHS.getValueType() == N->getValueType(0) &&
1395
"Unexpected setcc expansion!");
1399
// Otherwise, update N to have the operands specified.
1400
return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
1401
DAG.getCondCode(CCCode)), 0);
1404
SDValue DAGTypeLegalizer::ExpandFloatOp_STORE(SDNode *N, unsigned OpNo) {
1405
if (ISD::isNormalStore(N))
1406
return ExpandOp_NormalStore(N, OpNo);
1408
assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
1409
assert(OpNo == 1 && "Can only expand the stored value so far");
1410
StoreSDNode *ST = cast<StoreSDNode>(N);
1412
SDValue Chain = ST->getChain();
1413
SDValue Ptr = ST->getBasePtr();
1415
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(),
1416
ST->getValue().getValueType());
1417
assert(NVT.isByteSized() && "Expanded type not byte sized!");
1418
assert(ST->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1421
GetExpandedOp(ST->getValue(), Lo, Hi);
1423
return DAG.getTruncStore(Chain, N->getDebugLoc(), Hi, Ptr,
1424
ST->getSrcValue(), ST->getSrcValueOffset(),
1425
ST->getMemoryVT(), ST->isVolatile(),
1426
ST->isNonTemporal(), ST->getAlignment());