// MCInst records.
//
//===----------------------------------------------------------------------===//
-
-#include "MipsAsmPrinter.h"
-#include "MipsInstrInfo.h"
#include "MipsMCInstLower.h"
#include "MCTargetDesc/MipsBaseInfo.h"
+#include "MipsAsmPrinter.h"
+#include "MipsInstrInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineOperand.h"
using namespace llvm;
-MipsMCInstLower::MipsMCInstLower(Mangler *mang, const MachineFunction &mf,
- MipsAsmPrinter &asmprinter)
- : Ctx(mf.getContext()), Mang(mang), AsmPrinter(asmprinter) {}
+MipsMCInstLower::MipsMCInstLower(MipsAsmPrinter &asmprinter)
+ : AsmPrinter(asmprinter) {}
+
+void MipsMCInstLower::Initialize(Mangler *M, MCContext *C) {
+ Mang = M;
+ Ctx = C;
+}
MCOperand MipsMCInstLower::LowerSymbolOperand(const MachineOperand &MO,
MachineOperandType MOTy,
case MipsII::MO_GOT_DISP: Kind = MCSymbolRefExpr::VK_Mips_GOT_DISP; break;
case MipsII::MO_GOT_PAGE: Kind = MCSymbolRefExpr::VK_Mips_GOT_PAGE; break;
case MipsII::MO_GOT_OFST: Kind = MCSymbolRefExpr::VK_Mips_GOT_OFST; break;
+ case MipsII::MO_HIGHER: Kind = MCSymbolRefExpr::VK_Mips_HIGHER; break;
+ case MipsII::MO_HIGHEST: Kind = MCSymbolRefExpr::VK_Mips_HIGHEST; break;
+ case MipsII::MO_GOT_HI16: Kind = MCSymbolRefExpr::VK_Mips_GOT_HI16; break;
+ case MipsII::MO_GOT_LO16: Kind = MCSymbolRefExpr::VK_Mips_GOT_LO16; break;
+ case MipsII::MO_CALL_HI16: Kind = MCSymbolRefExpr::VK_Mips_CALL_HI16; break;
+ case MipsII::MO_CALL_LO16: Kind = MCSymbolRefExpr::VK_Mips_CALL_LO16; break;
}
switch (MOTy) {
case MachineOperand::MO_GlobalAddress:
Symbol = Mang->getSymbol(MO.getGlobal());
+ Offset += MO.getOffset();
break;
case MachineOperand::MO_BlockAddress:
Symbol = AsmPrinter.GetBlockAddressSymbol(MO.getBlockAddress());
+ Offset += MO.getOffset();
break;
case MachineOperand::MO_ExternalSymbol:
Symbol = AsmPrinter.GetExternalSymbolSymbol(MO.getSymbolName());
+ Offset += MO.getOffset();
break;
case MachineOperand::MO_JumpTableIndex:
case MachineOperand::MO_ConstantPoolIndex:
Symbol = AsmPrinter.GetCPISymbol(MO.getIndex());
- if (MO.getOffset())
- Offset += MO.getOffset();
+ Offset += MO.getOffset();
break;
default:
llvm_unreachable("<unknown operand type>");
}
-
- const MCSymbolRefExpr *MCSym = MCSymbolRefExpr::Create(Symbol, Kind, Ctx);
+
+ const MCSymbolRefExpr *MCSym = MCSymbolRefExpr::Create(Symbol, Kind, *Ctx);
if (!Offset)
return MCOperand::CreateExpr(MCSym);
// Assume offset is never negative.
assert(Offset > 0);
-
- const MCConstantExpr *OffsetExpr = MCConstantExpr::Create(Offset, Ctx);
- const MCBinaryExpr *AddExpr = MCBinaryExpr::CreateAdd(MCSym, OffsetExpr, Ctx);
- return MCOperand::CreateExpr(AddExpr);
-}
-
-// Lower ".cpload $reg" to
-// "lui $gp, %hi(_gp_disp)"
-// "addiu $gp, $gp, %lo(_gp_disp)"
-// "addu $gp. $gp, $reg"
-void MipsMCInstLower::LowerCPLOAD(const MachineInstr *MI,
- SmallVector<MCInst, 4>& MCInsts) {
- MCInst Lui, Addiu, Addu;
- StringRef SymName("_gp_disp");
- const MCSymbol *Symbol = Ctx.GetOrCreateSymbol(SymName);
- const MCSymbolRefExpr *MCSym;
- // lui $gp, %hi(_gp_disp)
- Lui.setOpcode(Mips::LUi);
- Lui.addOperand(MCOperand::CreateReg(Mips::GP));
- MCSym = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_Mips_ABS_HI, Ctx);
- Lui.addOperand(MCOperand::CreateExpr(MCSym));
- MCInsts.push_back(Lui);
-
- // addiu $gp, $gp, %lo(_gp_disp)
- Addiu.setOpcode(Mips::ADDiu);
- Addiu.addOperand(MCOperand::CreateReg(Mips::GP));
- Addiu.addOperand(MCOperand::CreateReg(Mips::GP));
- MCSym = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_Mips_ABS_LO, Ctx);
- Addiu.addOperand(MCOperand::CreateExpr(MCSym));
- MCInsts.push_back(Addiu);
-
- // addu $gp. $gp, $reg
- Addu.setOpcode(Mips::ADDu);
- Addu.addOperand(MCOperand::CreateReg(Mips::GP));
- Addu.addOperand(MCOperand::CreateReg(Mips::GP));
- const MachineOperand &MO = MI->getOperand(0);
- assert(MO.isReg() && "CPLOAD's operand must be a register.");
- Addu.addOperand(MCOperand::CreateReg(MO.getReg()));
- MCInsts.push_back(Addu);
+ const MCConstantExpr *OffsetExpr = MCConstantExpr::Create(Offset, *Ctx);
+ const MCBinaryExpr *Add = MCBinaryExpr::CreateAdd(MCSym, OffsetExpr, *Ctx);
+ return MCOperand::CreateExpr(Add);
}
-// Lower ".cprestore offset" to "sw $gp, offset($sp)".
-void MipsMCInstLower::LowerCPRESTORE(const MachineInstr *MI,
- SmallVector<MCInst, 4>& MCInsts) {
- const MachineOperand &MO = MI->getOperand(0);
- assert(MO.isImm() && "CPRESTORE's operand must be an immediate.");
- unsigned Offset = MO.getImm(), Reg = Mips::SP;
- MCInst Sw;
-
- if (Offset >= 0x8000) {
- unsigned Hi = (Offset >> 16) + ((Offset & 0x8000) != 0);
- Offset &= 0xffff;
- Reg = Mips::AT;
-
- // lui at,hi
- // addu at,at,sp
- MCInsts.resize(2);
- MCInsts[0].setOpcode(Mips::LUi);
- MCInsts[0].addOperand(MCOperand::CreateReg(Mips::AT));
- MCInsts[0].addOperand(MCOperand::CreateImm(Hi));
- MCInsts[1].setOpcode(Mips::ADDu);
- MCInsts[1].addOperand(MCOperand::CreateReg(Mips::AT));
- MCInsts[1].addOperand(MCOperand::CreateReg(Mips::AT));
- MCInsts[1].addOperand(MCOperand::CreateReg(Mips::SP));
- }
-
- Sw.setOpcode(Mips::SW);
- Sw.addOperand(MCOperand::CreateReg(Mips::GP));
- Sw.addOperand(MCOperand::CreateReg(Reg));
- Sw.addOperand(MCOperand::CreateImm(Offset));
- MCInsts.push_back(Sw);
+/*
+static void CreateMCInst(MCInst& Inst, unsigned Opc, const MCOperand &Opnd0,
+ const MCOperand &Opnd1,
+ const MCOperand &Opnd2 = MCOperand()) {
+ Inst.setOpcode(Opc);
+ Inst.addOperand(Opnd0);
+ Inst.addOperand(Opnd1);
+ if (Opnd2.isValid())
+ Inst.addOperand(Opnd2);
}
+*/
-MCOperand MipsMCInstLower::LowerOperand(const MachineOperand& MO,
- unsigned offset) const {
+MCOperand MipsMCInstLower::LowerOperand(const MachineOperand &MO,
+ unsigned offset) const {
MachineOperandType MOTy = MO.getType();
-
+
switch (MOTy) {
default: llvm_unreachable("unknown operand type");
case MachineOperand::MO_Register:
void MipsMCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
OutMI.setOpcode(MI->getOpcode());
-
+
for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
const MachineOperand &MO = MI->getOperand(i);
MCOperand MCOp = LowerOperand(MO);
}
}
-void MipsMCInstLower::LowerUnalignedLoadStore(const MachineInstr *MI,
- SmallVector<MCInst,
- 4>& MCInsts) {
- unsigned Opc = MI->getOpcode();
- MCInst Instr1, Instr2, Instr3, Move;
-
- bool TwoInstructions = false;
-
- assert(MI->getNumOperands() == 3);
- assert(MI->getOperand(0).isReg());
- assert(MI->getOperand(1).isReg());
-
- MCOperand Target = LowerOperand(MI->getOperand(0));
- MCOperand Base = LowerOperand(MI->getOperand(1));
- MCOperand ATReg = MCOperand::CreateReg(Mips::AT);
- MCOperand ZeroReg = MCOperand::CreateReg(Mips::ZERO);
-
- MachineOperand UnLoweredName = MI->getOperand(2);
- MCOperand Name = LowerOperand(UnLoweredName);
-
- Move.setOpcode(Mips::ADDu);
- Move.addOperand(Target);
- Move.addOperand(ATReg);
- Move.addOperand(ZeroReg);
-
- switch (Opc) {
- case Mips::ULW: {
- // FIXME: only works for little endian right now
- MCOperand AdjName = LowerOperand(UnLoweredName, 3);
- if (Base.getReg() == (Target.getReg())) {
- Instr1.setOpcode(Mips::LWL);
- Instr1.addOperand(ATReg);
- Instr1.addOperand(Base);
- Instr1.addOperand(AdjName);
- Instr2.setOpcode(Mips::LWR);
- Instr2.addOperand(ATReg);
- Instr2.addOperand(Base);
- Instr2.addOperand(Name);
- Instr3 = Move;
- } else {
- TwoInstructions = true;
- Instr1.setOpcode(Mips::LWL);
- Instr1.addOperand(Target);
- Instr1.addOperand(Base);
- Instr1.addOperand(AdjName);
- Instr2.setOpcode(Mips::LWR);
- Instr2.addOperand(Target);
- Instr2.addOperand(Base);
- Instr2.addOperand(Name);
- }
- break;
- }
- case Mips::ULHu: {
- // FIXME: only works for little endian right now
- MCOperand AdjName = LowerOperand(UnLoweredName, 1);
- Instr1.setOpcode(Mips::LBu);
- Instr1.addOperand(ATReg);
- Instr1.addOperand(Base);
- Instr1.addOperand(AdjName);
- Instr2.setOpcode(Mips::LBu);
- Instr2.addOperand(Target);
- Instr2.addOperand(Base);
- Instr2.addOperand(Name);
- Instr3.setOpcode(Mips::INS);
- Instr3.addOperand(Target);
- Instr3.addOperand(ATReg);
- Instr3.addOperand(MCOperand::CreateImm(0x8));
- Instr3.addOperand(MCOperand::CreateImm(0x18));
- break;
- }
-
- case Mips::USW: {
- // FIXME: only works for little endian right now
- assert (Base.getReg() != Target.getReg());
- TwoInstructions = true;
- MCOperand AdjName = LowerOperand(UnLoweredName, 3);
- Instr1.setOpcode(Mips::SWL);
- Instr1.addOperand(Target);
- Instr1.addOperand(Base);
- Instr1.addOperand(AdjName);
- Instr2.setOpcode(Mips::SWR);
- Instr2.addOperand(Target);
- Instr2.addOperand(Base);
- Instr2.addOperand(Name);
- break;
- }
- case Mips::USH: {
- MCOperand AdjName = LowerOperand(UnLoweredName, 1);
- Instr1.setOpcode(Mips::SB);
- Instr1.addOperand(Target);
- Instr1.addOperand(Base);
- Instr1.addOperand(Name);
- Instr2.setOpcode(Mips::SRL);
- Instr2.addOperand(ATReg);
- Instr2.addOperand(Target);
- Instr2.addOperand(MCOperand::CreateImm(8));
- Instr3.setOpcode(Mips::SB);
- Instr3.addOperand(ATReg);
- Instr3.addOperand(Base);
- Instr3.addOperand(AdjName);
- break;
- }
- default:
- // FIXME: need to add others
- llvm_unreachable("unaligned instruction not processed");
- }
-
- MCInsts.push_back(Instr1);
- MCInsts.push_back(Instr2);
- if (!TwoInstructions) MCInsts.push_back(Instr3);
-}
-
-// Convert
-// "setgp01 $reg"
-// to
-// "lui $reg, %hi(_gp_disp)"
-// "addiu $reg, $reg, %lo(_gp_disp)"
-void MipsMCInstLower::LowerSETGP01(const MachineInstr *MI,
- SmallVector<MCInst, 4>& MCInsts) {
- const MachineOperand &MO = MI->getOperand(0);
- assert(MO.isReg());
- MCOperand RegOpnd = MCOperand::CreateReg(MO.getReg());
- StringRef SymName("_gp_disp");
- const MCSymbol *Sym = Ctx.GetOrCreateSymbol(SymName);
- const MCSymbolRefExpr *MCSym;
-
- MCInsts.resize(2);
-
- MCSym = MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_Mips_ABS_HI, Ctx);
- MCInsts[0].setOpcode(Mips::LUi);
- MCInsts[0].addOperand(RegOpnd);
- MCInsts[0].addOperand(MCOperand::CreateExpr(MCSym));
- MCSym = MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_Mips_ABS_LO, Ctx);
- MCInsts[1].setOpcode(Mips::ADDiu);
- MCInsts[1].addOperand(RegOpnd);
- MCInsts[1].addOperand(RegOpnd);
- MCInsts[1].addOperand(MCOperand::CreateExpr(MCSym));
-}