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Model vst lane instructions with REG_SEQUENCE. 

llvm-svn: 103898
This commit is contained in:
Evan Cheng 2010-05-16 03:27:48 +00:00
parent 0af6889b89
commit 298e6b82eb
1 changed files with 75 additions and 7 deletions
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82
llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp
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@ -184,6 +184,10 @@ private:
///
SDNode *QuadDRegs(EVT VT, SDValue V0, SDValue V1, SDValue V2, SDValue V3);
/// QuadQRegs - Form 4 consecutive Q registers.
///
SDNode *QuadQRegs(EVT VT, SDValue V0, SDValue V1, SDValue V2, SDValue V3);
/// OctoDRegs - Form 8 consecutive D registers.
///
SDNode *OctoDRegs(EVT VT, SDValue V0, SDValue V1, SDValue V2, SDValue V3,
@ -996,6 +1000,19 @@ SDNode *ARMDAGToDAGISel::QuadDRegs(EVT VT, SDValue V0, SDValue V1,
return CurDAG->getMachineNode(TargetOpcode::REG_SEQUENCE, dl, VT, Ops, 8);
}
/// QuadQRegs - Form 4 consecutive Q registers.
///
SDNode *ARMDAGToDAGISel::QuadQRegs(EVT VT, SDValue V0, SDValue V1,
SDValue V2, SDValue V3) {
DebugLoc dl = V0.getNode()->getDebugLoc();
SDValue SubReg0 = CurDAG->getTargetConstant(ARM::QSUBREG_0, MVT::i32);
SDValue SubReg1 = CurDAG->getTargetConstant(ARM::QSUBREG_1, MVT::i32);
SDValue SubReg2 = CurDAG->getTargetConstant(ARM::QSUBREG_2, MVT::i32);
SDValue SubReg3 = CurDAG->getTargetConstant(ARM::QSUBREG_3, MVT::i32);
const SDValue Ops[] = { V0, SubReg0, V1, SubReg1, V2, SubReg2, V3, SubReg3 };
return CurDAG->getMachineNode(TargetOpcode::REG_SEQUENCE, dl, VT, Ops, 8);
}
/// OctoDRegs - Form 8 consecutive D registers.
///
SDNode *ARMDAGToDAGISel::OctoDRegs(EVT VT, SDValue V0, SDValue V1,
@ -1401,11 +1418,13 @@ SDNode *ARMDAGToDAGISel::SelectVLDSTLane(SDNode *N, bool IsLoad,
// Quad registers are handled by load/store of subregs. Find the subreg info.
unsigned NumElts = 0;
int SubregIdx = 0;
bool Even = false;
EVT RegVT = VT;
if (!is64BitVector) {
RegVT = GetNEONSubregVT(VT);
NumElts = RegVT.getVectorNumElements();
SubregIdx = (Lane < NumElts) ? ARM::DSUBREG_0 : ARM::DSUBREG_1;
Even = Lane < NumElts;
}
unsigned OpcodeIndex;
@ -1432,8 +1451,35 @@ SDNode *ARMDAGToDAGISel::SelectVLDSTLane(SDNode *N, bool IsLoad,
unsigned Opc = 0;
if (is64BitVector) {
Opc = DOpcodes[OpcodeIndex];
for (unsigned Vec = 0; Vec < NumVecs; ++Vec)
Ops.push_back(N->getOperand(Vec+3));
if (llvm::ModelWithRegSequence()) {
SDValue RegSeq;
SDValue V0 = N->getOperand(0+3);
SDValue V1 = N->getOperand(1+3);
if (NumVecs == 2) {
RegSeq = SDValue(PairDRegs(MVT::v2i64, V0, V1), 0);
} else {
SDValue V2 = N->getOperand(2+3);
SDValue V3 = (NumVecs == 3)
? SDValue(CurDAG->getMachineNode(TargetOpcode::IMPLICIT_DEF,dl,VT), 0)
: N->getOperand(3+3);
RegSeq = SDValue(QuadDRegs(MVT::v4i64, V0, V1, V2, V3), 0);
}
// Now extract the D registers back out.
Ops.push_back(CurDAG->getTargetExtractSubreg(ARM::DSUBREG_0, dl, VT,
RegSeq));
Ops.push_back(CurDAG->getTargetExtractSubreg(ARM::DSUBREG_1, dl, VT,
RegSeq));
if (NumVecs > 2)
Ops.push_back(CurDAG->getTargetExtractSubreg(ARM::DSUBREG_2, dl, VT,
RegSeq));
if (NumVecs > 3)
Ops.push_back(CurDAG->getTargetExtractSubreg(ARM::DSUBREG_3, dl, VT,
RegSeq));
} else {
for (unsigned Vec = 0; Vec < NumVecs; ++Vec)
Ops.push_back(N->getOperand(Vec+3));
}
} else {
// Check if this is loading the even or odd subreg of a Q register.
if (Lane < NumElts) {
@ -1442,10 +1488,32 @@ SDNode *ARMDAGToDAGISel::SelectVLDSTLane(SDNode *N, bool IsLoad,
Lane -= NumElts;
Opc = QOpcodes1[OpcodeIndex];
}
// Extract the subregs of the input vector.
for (unsigned Vec = 0; Vec < NumVecs; ++Vec)
Ops.push_back(CurDAG->getTargetExtractSubreg(SubregIdx, dl, RegVT,
N->getOperand(Vec+3)));
if (llvm::ModelWithRegSequence()) {
SDValue RegSeq;
SDValue V0 = N->getOperand(0+3);
SDValue V1 = N->getOperand(1+3);
if (NumVecs == 2) {
RegSeq = SDValue(PairQRegs(MVT::v4i64, V0, V1), 0);
} else {
SDValue V2 = N->getOperand(2+3);
SDValue V3 = (NumVecs == 3)
? SDValue(CurDAG->getMachineNode(TargetOpcode::IMPLICIT_DEF,dl,VT), 0)
: N->getOperand(3+3);
RegSeq = SDValue(QuadQRegs(MVT::v8i64, V0, V1, V2, V3), 0);
}
// Extract the subregs of the input vector.
unsigned SubIdx = Even ? ARM::DSUBREG_0 : ARM::DSUBREG_1;
for (unsigned Vec = 0; Vec < NumVecs; ++Vec)
Ops.push_back(CurDAG->getTargetExtractSubreg(SubIdx+Vec*2, dl, RegVT,
RegSeq));
} else {
// Extract the subregs of the input vector.
for (unsigned Vec = 0; Vec < NumVecs; ++Vec)
Ops.push_back(CurDAG->getTargetExtractSubreg(SubregIdx, dl, RegVT,
N->getOperand(Vec+3)));
}
}
Ops.push_back(getI32Imm(Lane));
Ops.push_back(Pred);
@ -1480,7 +1548,7 @@ SDNode *ARMDAGToDAGISel::SelectVLDSTLane(SDNode *N, bool IsLoad,
// as subregs into the result.
SDValue V[8];
for (unsigned Vec = 0, i = 0; Vec < NumVecs; ++Vec, i+=2) {
if (SubregIdx == ARM::DSUBREG_0) {
if (Even) {
V[i] = SDValue(VLdLn, Vec);
V[i+1] = SDValue(CurDAG->getMachineNode(TargetOpcode::IMPLICIT_DEF,
dl, RegVT), 0);