| Chris Lattner | 293ef9a | 2010-11-14 19:53:02 +0000 | [diff] [blame^] | 1 | //===-- PPCMCInstLower.cpp - Convert PPC MachineInstr to an MCInst --------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file contains code to lower PPC MachineInstrs to their corresponding |
| 11 | // MCInst records. |
| 12 | // |
| 13 | //===----------------------------------------------------------------------===// |
| 14 | |
| 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" |
| 20 | |
| 21 | using namespace llvm; |
| 22 | |
| 23 | void PPCMCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const { |
| 24 | OutMI.setOpcode(MI->getOpcode()); |
| 25 | |
| 26 | for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) { |
| 27 | const MachineOperand &MO = MI->getOperand(i); |
| 28 | |
| 29 | MCOperand MCOp; |
| 30 | switch (MO.getType()) { |
| 31 | default: |
| 32 | MI->dump(); |
| 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()); |
| 37 | break; |
| 38 | case MachineOperand::MO_Immediate: |
| 39 | MCOp = MCOperand::CreateImm(MO.getImm()); |
| 40 | break; |
| 41 | case MachineOperand::MO_MachineBasicBlock: |
| 42 | MCOp = MCOperand::CreateExpr(MCSymbolRefExpr::Create( |
| 43 | MO.getMBB()->getSymbol(), Ctx)); |
| 44 | break; |
| 45 | #if 0 |
| 46 | case MachineOperand::MO_GlobalAddress: |
| 47 | MCOp = LowerSymbolRefOperand(MO, GetSymbolRef(MO)); |
| 48 | break; |
| 49 | case MachineOperand::MO_ExternalSymbol: |
| 50 | MCOp = LowerSymbolRefOperand(MO, GetExternalSymbolSymbol(MO)); |
| 51 | break; |
| 52 | case MachineOperand::MO_JumpTableIndex: |
| 53 | MCOp = LowerSymbolOperand(MO, GetJumpTableSymbol(MO)); |
| 54 | break; |
| 55 | case MachineOperand::MO_ConstantPoolIndex: |
| 56 | MCOp = LowerSymbolOperand(MO, GetConstantPoolIndexSymbol(MO)); |
| 57 | break; |
| 58 | case MachineOperand::MO_BlockAddress: |
| 59 | MCOp = LowerSymbolOperand(MO, Printer.GetBlockAddressSymbol( |
| 60 | MO.getBlockAddress())); |
| 61 | break; |
| 62 | #endif |
| 63 | #if 0 |
| 64 | case MachineOperand::MO_FPImmediate: |
| 65 | APFloat Val = MO.getFPImm()->getValueAPF(); |
| 66 | bool ignored; |
| 67 | Val.convert(APFloat::IEEEdouble, APFloat::rmTowardZero, &ignored); |
| 68 | MCOp = MCOperand::CreateFPImm(Val.convertToDouble()); |
| 69 | break; |
| 70 | #endif |
| 71 | } |
| 72 | |
| 73 | OutMI.addOperand(MCOp); |
| 74 | } |
| 75 | } |