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| Current File : //usr/src/contrib/llvm/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp |
//===-------- 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"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
/// GetFPLibCall - Return the right libcall for the given floating point type.
static RTLIB::Libcall GetFPLibCall(EVT 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(dbgs() << "Soften float result " << ResNo << ": "; N->dump(&DAG);
dbgs() << "\n");
SDValue R = SDValue();
switch (N->getOpcode()) {
default:
#ifndef NDEBUG
dbgs() << "SoftenFloatResult #" << ResNo << ": ";
N->dump(&DAG); dbgs() << "\n";
#endif
llvm_unreachable("Do not know how to soften the result of this operator!");
case ISD::MERGE_VALUES:R = SoftenFloatRes_MERGE_VALUES(N, ResNo); break;
case ISD::BITCAST: R = SoftenFloatRes_BITCAST(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::FMA: R = SoftenFloatRes_FMA(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::FP16_TO_FP32:R = SoftenFloatRes_FP16_TO_FP32(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_BITCAST(SDNode *N) {
return BitConvertToInteger(N->getOperand(0));
}
SDValue DAGTypeLegalizer::SoftenFloatRes_MERGE_VALUES(SDNode *N,
unsigned ResNo) {
SDValue Op = DisintegrateMERGE_VALUES(N, ResNo);
return BitConvertToInteger(Op);
}
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(*DAG.getContext(),
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(*DAG.getContext(),
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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
unsigned Size = NVT.getSizeInBits();
// Mask = ~(1 << (Size-1))
APInt API = APInt::getAllOnesValue(Size);
API.clearBit(Size-1);
SDValue Mask = DAG.getConstant(API, NVT);
SDValue Op = GetSoftenedFloat(N->getOperand(0));
return DAG.getNode(ISD::AND, N->getDebugLoc(), NVT, Op, Mask);
}
SDValue DAGTypeLegalizer::SoftenFloatRes_FADD(SDNode *N) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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();
EVT LVT = LHS.getValueType();
EVT 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(RVT)));
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.getValueType())));
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(SignBit.getValueType())));
}
// 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(LVT)));
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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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_FMA(SDNode *N) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
SDValue Ops[3] = { GetSoftenedFloat(N->getOperand(0)),
GetSoftenedFloat(N->getOperand(1)),
GetSoftenedFloat(N->getOperand(2)) };
return MakeLibCall(GetFPLibCall(N->getValueType(0),
RTLIB::FMA_F32,
RTLIB::FMA_F64,
RTLIB::FMA_F80,
RTLIB::FMA_PPCF128),
NVT, Ops, 3, false, N->getDebugLoc());
}
SDValue DAGTypeLegalizer::SoftenFloatRes_FMUL(SDNode *N) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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());
}
// FIXME: Should we just use 'normal' FP_EXTEND / FP_TRUNC instead of special
// nodes?
SDValue DAGTypeLegalizer::SoftenFloatRes_FP16_TO_FP32(SDNode *N) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
SDValue Op = N->getOperand(0);
return MakeLibCall(RTLIB::FPEXT_F16_F32, NVT, &Op, 1, false,
N->getDebugLoc());
}
SDValue DAGTypeLegalizer::SoftenFloatRes_FP_ROUND(SDNode *N) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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!");
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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);
EVT VT = N->getValueType(0);
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
DebugLoc dl = N->getDebugLoc();
SDValue NewL;
if (L->getExtensionType() == ISD::NON_EXTLOAD) {
NewL = DAG.getLoad(L->getAddressingMode(), L->getExtensionType(),
NVT, dl, L->getChain(), L->getBasePtr(), L->getOffset(),
L->getPointerInfo(), NVT, L->isVolatile(),
L->isNonTemporal(), false, 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(), ISD::NON_EXTLOAD,
L->getMemoryVT(), dl, L->getChain(),
L->getBasePtr(), L->getOffset(), L->getPointerInfo(),
L->getMemoryVT(), L->isVolatile(),
L->isNonTemporal(), false, 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(*DAG.getContext(),
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.
EVT VT = N->getValueType(0);
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
DebugLoc dl = N->getDebugLoc();
SDValue NewVAARG;
NewVAARG = DAG.getVAArg(NVT, dl, Chain, Ptr, N->getOperand(2),
N->getConstantOperandVal(3));
// 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;
EVT SVT = N->getOperand(0).getValueType();
EVT RVT = N->getValueType(0);
EVT NVT = EVT();
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(*DAG.getContext(), RVT),
&Op, 1, false, dl);
}
//===----------------------------------------------------------------------===//
// Operand Float to Integer Conversion..
//===----------------------------------------------------------------------===//
bool DAGTypeLegalizer::SoftenFloatOperand(SDNode *N, unsigned OpNo) {
DEBUG(dbgs() << "Soften float operand " << OpNo << ": "; N->dump(&DAG);
dbgs() << "\n");
SDValue Res = SDValue();
switch (N->getOpcode()) {
default:
#ifndef NDEBUG
dbgs() << "SoftenFloatOperand Op #" << OpNo << ": ";
N->dump(&DAG); dbgs() << "\n";
#endif
llvm_unreachable("Do not know how to soften this operator's operand!");
case ISD::BITCAST: Res = SoftenFloatOp_BITCAST(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::FP32_TO_FP16:Res = SoftenFloatOp_FP32_TO_FP16(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);
EVT 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: llvm_unreachable("Do not know how to soften this setcc!");
}
}
// Use the target specific return value for comparions lib calls.
EVT RetVT = TLI.getCmpLibcallReturnType();
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_BITCAST(SDNode *N) {
return DAG.getNode(ISD::BITCAST, N->getDebugLoc(), N->getValueType(0),
GetSoftenedFloat(N->getOperand(0)));
}
SDValue DAGTypeLegalizer::SoftenFloatOp_FP_ROUND(SDNode *N) {
EVT SVT = N->getOperand(0).getValueType();
EVT 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 SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
DAG.getCondCode(CCCode), NewLHS, NewRHS,
N->getOperand(4)),
0);
}
SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_SINT(SDNode *N) {
EVT 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) {
EVT 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_FP32_TO_FP16(SDNode *N) {
EVT RVT = N->getValueType(0);
RTLIB::Libcall LC = RTLIB::FPROUND_F32_F16;
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 SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
N->getOperand(2), N->getOperand(3),
DAG.getCondCode(CCCode)),
0);
}
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 SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
DAG.getCondCode(CCCode)),
0);
}
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->getPointerInfo(),
ST->isVolatile(), ST->isNonTemporal(),
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(dbgs() << "Expand float result: "; N->dump(&DAG); dbgs() << "\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
dbgs() << "ExpandFloatResult #" << ResNo << ": ";
N->dump(&DAG); dbgs() << "\n";
#endif
llvm_unreachable("Do not know how to expand the result of this operator!");
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::MERGE_VALUES: ExpandRes_MERGE_VALUES(N, ResNo, Lo, Hi); break;
case ISD::BITCAST: ExpandRes_BITCAST(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::FCOPYSIGN: ExpandFloatRes_FCOPYSIGN(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::FMA: ExpandFloatRes_FMA(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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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, C.getRawData()[1])),
NVT);
Hi = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 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_FCOPYSIGN(SDNode *N,
SDValue &Lo, SDValue &Hi) {
SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
RTLIB::COPYSIGN_F32,
RTLIB::COPYSIGN_F64,
RTLIB::COPYSIGN_F80,
RTLIB::COPYSIGN_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_FMA(SDNode *N, SDValue &Lo,
SDValue &Hi) {
SDValue Ops[3] = { N->getOperand(0), N->getOperand(1), N->getOperand(2) };
SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
RTLIB::FMA_F32,
RTLIB::FMA_F64,
RTLIB::FMA_F80,
RTLIB::FMA_PPCF128),
N->getValueType(0), Ops, 3, false,
N->getDebugLoc());
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) {
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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();
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 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->getPointerInfo(), LD->getMemoryVT(), LD->isVolatile(),
LD->isNonTemporal(), 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!");
EVT VT = N->getValueType(0);
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
SDValue Src = N->getOperand(0);
EVT 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 };
ArrayRef<uint64_t> Parts;
switch (SrcVT.getSimpleVT().SimpleTy) {
default:
llvm_unreachable("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, 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(dbgs() << "Expand float operand: "; N->dump(&DAG); dbgs() << "\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
dbgs() << "ExpandFloatOperand Op #" << OpNo << ": ";
N->dump(&DAG); dbgs() << "\n";
#endif
llvm_unreachable("Do not know how to expand this operator's operand!");
case ISD::BITCAST: Res = ExpandOp_BITCAST(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);
assert(NewLHS.getValueType() == 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 SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
DAG.getCondCode(CCCode), NewLHS, NewRHS,
N->getOperand(4)), 0);
}
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) {
EVT 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) {
EVT 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, 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 SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
N->getOperand(2), N->getOperand(3),
DAG.getCondCode(CCCode)), 0);
}
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 SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
DAG.getCondCode(CCCode)), 0);
}
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();
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(),
ST->getValue().getValueType());
assert(NVT.isByteSized() && "Expanded type not byte sized!");
assert(ST->getMemoryVT().bitsLE(NVT) && "Float type not round?");
(void)NVT;
SDValue Lo, Hi;
GetExpandedOp(ST->getValue(), Lo, Hi);
return DAG.getTruncStore(Chain, N->getDebugLoc(), Hi, Ptr,
ST->getPointerInfo(),
ST->getMemoryVT(), ST->isVolatile(),
ST->isNonTemporal(), ST->getAlignment());
}