// Create an MCInst from a MachineInstr
void llvm::HexagonLowerToMC(const MachineInstr* MI, HexagonMCInst& MCI,
HexagonAsmPrinter& AP) {
MCI.setOpcode(MI->getOpcode());
MCI.setDesc(MI->getDesc());
for (unsigned i = 0, e = MI->getNumOperands(); i < e; i++) {
const MachineOperand &MO = MI->getOperand(i);
MCOperand MCO;
switch (MO.getType()) {
default:
MI->dump();
llvm_unreachable("unknown operand type");
case MachineOperand::MO_Register:
// Ignore all implicit register operands.
if (MO.isImplicit()) continue;
MCO = MCOperand::CreateReg(MO.getReg());
break;
case MachineOperand::MO_FPImmediate: {
APFloat Val = MO.getFPImm()->getValueAPF();
// FP immediates are used only when setting GPRs, so they may be dealt
// with like regular immediates from this point on.
MCO = MCOperand::CreateImm(*Val.bitcastToAPInt().getRawData());
break;
}
case MachineOperand::MO_Immediate:
MCO = MCOperand::CreateImm(MO.getImm());
break;
case MachineOperand::MO_MachineBasicBlock:
MCO = MCOperand::CreateExpr
(MCSymbolRefExpr::Create(MO.getMBB()->getSymbol(),
AP.OutContext));
break;
case MachineOperand::MO_GlobalAddress:
MCO = GetSymbolRef(MO, AP.Mang->getSymbol(MO.getGlobal()), AP);
break;
case MachineOperand::MO_ExternalSymbol:
MCO = GetSymbolRef(MO, AP.GetExternalSymbolSymbol(MO.getSymbolName()),
AP);
break;
case MachineOperand::MO_JumpTableIndex:
MCO = GetSymbolRef(MO, AP.GetJTISymbol(MO.getIndex()), AP);
break;
case MachineOperand::MO_ConstantPoolIndex:
MCO = GetSymbolRef(MO, AP.GetCPISymbol(MO.getIndex()), AP);
break;
case MachineOperand::MO_BlockAddress:
MCO = GetSymbolRef(MO, AP.GetBlockAddressSymbol(MO.getBlockAddress()),AP);
break;
}
MCI.addOperand(MCO);
}
}
/// printMachineInstruction -- Print out a single Hexagon MI in Darwin syntax to
/// the current output stream.
///
void HexagonAsmPrinter::EmitInstruction(const MachineInstr *MI) {
if (MI->isBundle()) {
std::vector<const MachineInstr*> BundleMIs;
const MachineBasicBlock *MBB = MI->getParent();
MachineBasicBlock::const_instr_iterator MII = MI;
++MII;
unsigned int IgnoreCount = 0;
while (MII != MBB->end() && MII->isInsideBundle()) {
const MachineInstr *MInst = MII;
if (MInst->getOpcode() == TargetOpcode::DBG_VALUE ||
MInst->getOpcode() == TargetOpcode::IMPLICIT_DEF) {
IgnoreCount++;
++MII;
continue;
}
//BundleMIs.push_back(&*MII);
BundleMIs.push_back(MInst);
++MII;
}
unsigned Size = BundleMIs.size();
assert((Size+IgnoreCount) == MI->getBundleSize() && "Corrupt Bundle!");
for (unsigned Index = 0; Index < Size; Index++) {
HexagonMCInst MCI (BundleMIs[Index]->getOpcode());
MCI.setPacketBegin(Index == 0);
MCI.setPacketEnd(Index == (Size-1));
HexagonLowerToMC(BundleMIs[Index], MCI, *this);
EmitToStreamer(OutStreamer, MCI);
}
}
else {
HexagonMCInst MCI(MI->getOpcode());
if (MI->getOpcode() == Hexagon::ENDLOOP0) {
MCI.setPacketBegin(true);
MCI.setPacketEnd(true);
}
HexagonLowerToMC(MI, MCI, *this);
EmitToStreamer(OutStreamer, MCI);
}
return;
}
void HexagonInstPrinter::printInst(const HexagonMCInst *MI, raw_ostream &O,
StringRef Annot) {
const char packetPadding[] = " ";
const char startPacket = '{',
endPacket = '}';
// TODO: add outer HW loop when it's supported too.
if (MI->getOpcode() == Hexagon::ENDLOOP0) {
// Ending a harware loop is different from ending an regular packet.
assert(MI->isEndPacket() && "Loop end must also end the packet");
if (MI->isStartPacket()) {
// There must be a packet to end a loop.
// FIXME: when shuffling is always run, this shouldn't be needed.
HexagonMCInst Nop;
StringRef NoAnnot;
Nop.setOpcode (Hexagon::NOP);
Nop.setStartPacket (MI->isStartPacket());
printInst (&Nop, O, NoAnnot);
}
// Close the packet.
if (MI->isEndPacket())
O << packetPadding << endPacket;
printInstruction(MI, O);
}
else {
// Prefix the insn opening the packet.
if (MI->isStartPacket())
O << packetPadding << startPacket << '\n';
printInstruction(MI, O);
// Suffix the insn closing the packet.
if (MI->isEndPacket())
// Suffix the packet in a new line always, since the GNU assembler has
// issues with a closing brace on the same line as CONST{32,64}.
O << '\n' << packetPadding << endPacket;
}
printAnnotation(O, Annot);
}