1 //===-- PPCMCInstLower.cpp - Convert PPC MachineInstr to an MCInst --------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains code to lower PPC MachineInstrs to their corresponding
13 //===----------------------------------------------------------------------===//
15 #include "PPCMCInstLower.h"
16 #include "llvm/CodeGen/AsmPrinter.h"
17 #include "llvm/CodeGen/MachineBasicBlock.h"
18 #include "llvm/MC/MCExpr.h"
19 #include "llvm/MC/MCInst.h"
23 void PPCMCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
24 OutMI.setOpcode(MI->getOpcode());
26 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
27 const MachineOperand &MO = MI->getOperand(i);
30 switch (MO.getType()) {
33 assert(0 && "unknown operand type");
34 case MachineOperand::MO_Register:
35 assert(!MO.getSubReg() && "Subregs should be eliminated!");
36 MCOp = MCOperand::CreateReg(MO.getReg());
38 case MachineOperand::MO_Immediate:
39 MCOp = MCOperand::CreateImm(MO.getImm());
41 case MachineOperand::MO_MachineBasicBlock:
42 MCOp = MCOperand::CreateExpr(MCSymbolRefExpr::Create(
43 MO.getMBB()->getSymbol(), Ctx));
46 case MachineOperand::MO_GlobalAddress:
47 MCOp = LowerSymbolRefOperand(MO, GetSymbolRef(MO));
49 case MachineOperand::MO_ExternalSymbol:
50 MCOp = LowerSymbolRefOperand(MO, GetExternalSymbolSymbol(MO));
52 case MachineOperand::MO_JumpTableIndex:
53 MCOp = LowerSymbolOperand(MO, GetJumpTableSymbol(MO));
55 case MachineOperand::MO_ConstantPoolIndex:
56 MCOp = LowerSymbolOperand(MO, GetConstantPoolIndexSymbol(MO));
58 case MachineOperand::MO_BlockAddress:
59 MCOp = LowerSymbolOperand(MO, Printer.GetBlockAddressSymbol(
60 MO.getBlockAddress()));
64 case MachineOperand::MO_FPImmediate:
65 APFloat Val = MO.getFPImm()->getValueAPF();
67 Val.convert(APFloat::IEEEdouble, APFloat::rmTowardZero, &ignored);
68 MCOp = MCOperand::CreateFPImm(Val.convertToDouble());
73 OutMI.addOperand(MCOp);