#include "llvm/DerivedTypes.h"
#include "llvm/Function.h"
#include "llvm/PassManager.h"
-#include "llvm/CodeGen/MachineCodeEmitter.h"
+#include "llvm/CodeGen/JITCodeEmitter.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/CodeGen/MachineJumpTableInfo.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/ADT/Statistic.h"
-#include "llvm/Support/Compiler.h"
#include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
+#ifndef NDEBUG
+#include <iomanip>
+#endif
using namespace llvm;
STATISTIC(NumEmitted, "Number of machine instructions emitted");
namespace {
- class VISIBILITY_HIDDEN ARMCodeEmitter : public MachineFunctionPass {
+
+ class ARMCodeEmitter : public MachineFunctionPass {
ARMJITInfo *JTI;
const ARMInstrInfo *II;
const TargetData *TD;
+ const ARMSubtarget *Subtarget;
TargetMachine &TM;
- MachineCodeEmitter &MCE;
+ JITCodeEmitter &MCE;
+ MachineModuleInfo *MMI;
const std::vector<MachineConstantPoolEntry> *MCPEs;
-
- public:
+ const std::vector<MachineJumpTableEntry> *MJTEs;
+ bool IsPIC;
+
+ void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.addRequired<MachineModuleInfo>();
+ MachineFunctionPass::getAnalysisUsage(AU);
+ }
+
static char ID;
- explicit ARMCodeEmitter(TargetMachine &tm, MachineCodeEmitter &mce)
- : MachineFunctionPass(&ID), JTI(0), II(0), TD(0), TM(tm),
- MCE(mce), MCPEs(0) {}
- ARMCodeEmitter(TargetMachine &tm, MachineCodeEmitter &mce,
- const ARMInstrInfo &ii, const TargetData &td)
- : MachineFunctionPass(&ID), JTI(0), II(&ii), TD(&td), TM(tm),
- MCE(mce), MCPEs(0) {}
+ public:
+ ARMCodeEmitter(TargetMachine &tm, JITCodeEmitter &mce)
+ : MachineFunctionPass(&ID), JTI(0),
+ II((const ARMInstrInfo *)tm.getInstrInfo()),
+ TD(tm.getTargetData()), TM(tm),
+ MCE(mce), MCPEs(0), MJTEs(0),
+ IsPIC(TM.getRelocationModel() == Reloc::PIC_) {}
+
+ /// getBinaryCodeForInstr - This function, generated by the
+ /// CodeEmitterGenerator using TableGen, produces the binary encoding for
+ /// machine instructions.
+ unsigned getBinaryCodeForInstr(const MachineInstr &MI);
bool runOnMachineFunction(MachineFunction &MF);
private:
+ void emitWordLE(unsigned Binary);
+ void emitDWordLE(uint64_t Binary);
void emitConstPoolInstruction(const MachineInstr &MI);
-
+ void emitMOVi2piecesInstruction(const MachineInstr &MI);
+ void emitLEApcrelJTInstruction(const MachineInstr &MI);
+ void emitPseudoMoveInstruction(const MachineInstr &MI);
+ void addPCLabel(unsigned LabelID);
void emitPseudoInstruction(const MachineInstr &MI);
-
- unsigned getAddrModeNoneInstrBinary(const MachineInstr &MI,
- const TargetInstrDesc &TID,
- unsigned Binary);
-
unsigned getMachineSoRegOpValue(const MachineInstr &MI,
const TargetInstrDesc &TID,
const MachineOperand &MO,
unsigned OpIdx);
- unsigned getMachineSoImmOpValue(const MachineInstr &MI,
- const TargetInstrDesc &TID,
- const MachineOperand &MO);
-
- unsigned getAddrMode1SBit(const MachineInstr &MI,
- const TargetInstrDesc &TID) const;
-
- unsigned getAddrMode1InstrBinary(const MachineInstr &MI,
- const TargetInstrDesc &TID,
- unsigned Binary);
- unsigned getAddrMode2InstrBinary(const MachineInstr &MI,
- const TargetInstrDesc &TID,
- unsigned Binary);
- unsigned getAddrMode3InstrBinary(const MachineInstr &MI,
- const TargetInstrDesc &TID,
- unsigned Binary);
- unsigned getAddrMode4InstrBinary(const MachineInstr &MI,
- const TargetInstrDesc &TID,
- unsigned Binary);
-
- /// getInstrBinary - Return binary encoding for the specified
- /// machine instruction.
- unsigned getInstrBinary(const MachineInstr &MI);
+ unsigned getMachineSoImmOpValue(unsigned SoImm);
- /// getBinaryCodeForInstr - This function, generated by the
- /// CodeEmitterGenerator using TableGen, produces the binary encoding for
- /// machine instructions.
- ///
- unsigned getBinaryCodeForInstr(const MachineInstr &MI);
+ unsigned getAddrModeSBit(const MachineInstr &MI,
+ const TargetInstrDesc &TID) const;
+
+ void emitDataProcessingInstruction(const MachineInstr &MI,
+ unsigned ImplicitRd = 0,
+ unsigned ImplicitRn = 0);
+
+ void emitLoadStoreInstruction(const MachineInstr &MI,
+ unsigned ImplicitRd = 0,
+ unsigned ImplicitRn = 0);
+
+ void emitMiscLoadStoreInstruction(const MachineInstr &MI,
+ unsigned ImplicitRn = 0);
+
+ void emitLoadStoreMultipleInstruction(const MachineInstr &MI);
+
+ void emitMulFrmInstruction(const MachineInstr &MI);
+
+ void emitExtendInstruction(const MachineInstr &MI);
+
+ void emitMiscArithInstruction(const MachineInstr &MI);
+
+ void emitBranchInstruction(const MachineInstr &MI);
+
+ void emitInlineJumpTable(unsigned JTIndex);
+
+ void emitMiscBranchInstruction(const MachineInstr &MI);
+
+ void emitVFPArithInstruction(const MachineInstr &MI);
+
+ void emitVFPConversionInstruction(const MachineInstr &MI);
+
+ void emitVFPLoadStoreInstruction(const MachineInstr &MI);
+
+ void emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI);
+
+ void emitMiscInstruction(const MachineInstr &MI);
/// getMachineOpValue - Return binary encoding of operand. If the machine
/// operand requires relocation, record the relocation and return zero.
return getMachineOpValue(MI, MI.getOperand(OpIdx));
}
- /// getBaseOpcodeFor - Return the opcode value.
- ///
- unsigned getBaseOpcodeFor(const TargetInstrDesc &TID) const {
- return (TID.TSFlags & ARMII::OpcodeMask) >> ARMII::OpcodeShift;
- }
-
- /// getShiftOp - Return the shift opcode (bit[6:5]) of the machine operand.
+ /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
///
- unsigned getShiftOp(const MachineOperand &MO) const ;
+ unsigned getShiftOp(unsigned Imm) const ;
/// Routines that handle operands which add machine relocations which are
- /// fixed up by the JIT fixup stage.
- void emitGlobalAddress(GlobalValue *GV, unsigned Reloc,
- bool NeedStub);
+ /// fixed up by the relocation stage.
+ void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
+ bool MayNeedFarStub, bool Indirect,
+ intptr_t ACPV = 0);
void emitExternalSymbolAddress(const char *ES, unsigned Reloc);
- void emitConstPoolAddress(unsigned CPI, unsigned Reloc,
- int Disp = 0, unsigned PCAdj = 0 );
- void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc,
- unsigned PCAdj = 0);
- void emitGlobalConstant(const Constant *CV);
- void emitMachineBasicBlock(MachineBasicBlock *BB);
+ void emitConstPoolAddress(unsigned CPI, unsigned Reloc);
+ void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc);
+ void emitMachineBasicBlock(MachineBasicBlock *BB, unsigned Reloc,
+ intptr_t JTBase = 0);
};
- char ARMCodeEmitter::ID = 0;
}
-/// createARMCodeEmitterPass - Return a pass that emits the collected ARM code
-/// to the specified MCE object.
-FunctionPass *llvm::createARMCodeEmitterPass(ARMTargetMachine &TM,
- MachineCodeEmitter &MCE) {
- return new ARMCodeEmitter(TM, MCE);
+char ARMCodeEmitter::ID = 0;
+
+/// createARMJITCodeEmitterPass - Return a pass that emits the collected ARM
+/// code to the specified MCE object.
+FunctionPass *llvm::createARMJITCodeEmitterPass(ARMBaseTargetMachine &TM,
+ JITCodeEmitter &JCE) {
+ return new ARMCodeEmitter(TM, JCE);
}
bool ARMCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
assert((MF.getTarget().getRelocationModel() != Reloc::Default ||
MF.getTarget().getRelocationModel() != Reloc::Static) &&
"JIT relocation model must be set to static or default!");
- II = ((ARMTargetMachine&)MF.getTarget()).getInstrInfo();
- TD = ((ARMTargetMachine&)MF.getTarget()).getTargetData();
- JTI = ((ARMTargetMachine&)MF.getTarget()).getJITInfo();
+ JTI = ((ARMTargetMachine &)MF.getTarget()).getJITInfo();
+ II = ((const ARMTargetMachine &)MF.getTarget()).getInstrInfo();
+ TD = ((const ARMTargetMachine &)MF.getTarget()).getTargetData();
+ Subtarget = &TM.getSubtarget<ARMSubtarget>();
MCPEs = &MF.getConstantPool()->getConstants();
- JTI->ResizeConstPoolMap(MCPEs->size());
+ MJTEs = 0;
+ if (MF.getJumpTableInfo()) MJTEs = &MF.getJumpTableInfo()->getJumpTables();
+ IsPIC = TM.getRelocationModel() == Reloc::PIC_;
+ JTI->Initialize(MF, IsPIC);
+ MMI = &getAnalysis<MachineModuleInfo>();
+ MCE.setModuleInfo(MMI);
do {
- DOUT << "JITTing function '" << MF.getFunction()->getName() << "'\n";
+ DEBUG(errs() << "JITTing function '"
+ << MF.getFunction()->getName() << "'\n");
MCE.startFunction(MF);
- for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
+ for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
MBB != E; ++MBB) {
MCE.StartMachineBasicBlock(MBB);
for (MachineBasicBlock::const_iterator I = MBB->begin(), E = MBB->end();
return false;
}
-/// getShiftOp - Return the shift opcode (bit[6:5]) of the machine operand.
+/// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
///
-unsigned ARMCodeEmitter::getShiftOp(const MachineOperand &MO) const {
- switch (ARM_AM::getAM2ShiftOpc(MO.getImm())) {
- default: assert(0 && "Unknown shift opc!");
+unsigned ARMCodeEmitter::getShiftOp(unsigned Imm) const {
+ switch (ARM_AM::getAM2ShiftOpc(Imm)) {
+ default: llvm_unreachable("Unknown shift opc!");
case ARM_AM::asr: return 2;
case ARM_AM::lsl: return 0;
case ARM_AM::lsr: return 1;
else if (MO.isImm())
return static_cast<unsigned>(MO.getImm());
else if (MO.isGlobal())
- emitGlobalAddress(MO.getGlobal(), ARM::reloc_arm_branch, true);
+ emitGlobalAddress(MO.getGlobal(), ARM::reloc_arm_branch, true, false);
else if (MO.isSymbol())
- emitExternalSymbolAddress(MO.getSymbolName(), ARM::reloc_arm_relative);
- else if (MO.isCPI())
- emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry);
- else if (MO.isJTI())
+ emitExternalSymbolAddress(MO.getSymbolName(), ARM::reloc_arm_branch);
+ else if (MO.isCPI()) {
+ const TargetInstrDesc &TID = MI.getDesc();
+ // For VFP load, the immediate offset is multiplied by 4.
+ unsigned Reloc = ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPLdStFrm)
+ ? ARM::reloc_arm_vfp_cp_entry : ARM::reloc_arm_cp_entry;
+ emitConstPoolAddress(MO.getIndex(), Reloc);
+ } else if (MO.isJTI())
emitJumpTableAddress(MO.getIndex(), ARM::reloc_arm_relative);
else if (MO.isMBB())
- emitMachineBasicBlock(MO.getMBB());
+ emitMachineBasicBlock(MO.getMBB(), ARM::reloc_arm_branch);
else {
- cerr << "ERROR: Unknown type of MachineOperand: " << MO << "\n";
- abort();
+#ifndef NDEBUG
+ errs() << MO;
+#endif
+ llvm_unreachable(0);
}
return 0;
}
/// emitGlobalAddress - Emit the specified address to the code stream.
///
-void ARMCodeEmitter::emitGlobalAddress(GlobalValue *GV,
- unsigned Reloc, bool NeedStub) {
- MCE.addRelocation(MachineRelocation::getGV(MCE.getCurrentPCOffset(),
- Reloc, GV, 0, NeedStub));
+void ARMCodeEmitter::emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
+ bool MayNeedFarStub, bool Indirect,
+ intptr_t ACPV) {
+ MachineRelocation MR = Indirect
+ ? MachineRelocation::getIndirectSymbol(MCE.getCurrentPCOffset(), Reloc,
+ const_cast<GlobalValue *>(GV),
+ ACPV, MayNeedFarStub)
+ : MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc,
+ const_cast<GlobalValue *>(GV), ACPV,
+ MayNeedFarStub);
+ MCE.addRelocation(MR);
}
/// emitExternalSymbolAddress - Arrange for the address of an external symbol to
/// emitConstPoolAddress - Arrange for the address of an constant pool
/// to be emitted to the current location in the function, and allow it to be PC
/// relative.
-void ARMCodeEmitter::emitConstPoolAddress(unsigned CPI, unsigned Reloc,
- int Disp /* = 0 */,
- unsigned PCAdj /* = 0 */) {
+void ARMCodeEmitter::emitConstPoolAddress(unsigned CPI, unsigned Reloc) {
// Tell JIT emitter we'll resolve the address.
MCE.addRelocation(MachineRelocation::getConstPool(MCE.getCurrentPCOffset(),
- Reloc, CPI, PCAdj, true));
+ Reloc, CPI, 0, true));
}
/// emitJumpTableAddress - Arrange for the address of a jump table to
/// be emitted to the current location in the function, and allow it to be PC
/// relative.
-void ARMCodeEmitter::emitJumpTableAddress(unsigned JTIndex, unsigned Reloc,
- unsigned PCAdj /* = 0 */) {
+void ARMCodeEmitter::emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) {
MCE.addRelocation(MachineRelocation::getJumpTable(MCE.getCurrentPCOffset(),
- Reloc, JTIndex, PCAdj));
+ Reloc, JTIndex, 0, true));
}
/// emitMachineBasicBlock - Emit the specified address basic block.
-void ARMCodeEmitter::emitMachineBasicBlock(MachineBasicBlock *BB) {
+void ARMCodeEmitter::emitMachineBasicBlock(MachineBasicBlock *BB,
+ unsigned Reloc, intptr_t JTBase) {
MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(),
- ARM::reloc_arm_branch, BB));
+ Reloc, BB, JTBase));
+}
+
+void ARMCodeEmitter::emitWordLE(unsigned Binary) {
+ DEBUG(errs() << " 0x";
+ errs().write_hex(Binary) << "\n");
+ MCE.emitWordLE(Binary);
+}
+
+void ARMCodeEmitter::emitDWordLE(uint64_t Binary) {
+ DEBUG(errs() << " 0x";
+ errs().write_hex(Binary) << "\n");
+ MCE.emitDWordLE(Binary);
}
void ARMCodeEmitter::emitInstruction(const MachineInstr &MI) {
- DOUT << "JIT: " << "0x" << MCE.getCurrentPCValue() << ":\t" << MI;
+ DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << MI);
+
+ MCE.processDebugLoc(MI.getDebugLoc(), true);
NumEmitted++; // Keep track of the # of mi's emitted
- if ((MI.getDesc().TSFlags & ARMII::FormMask) == ARMII::Pseudo)
+ switch (MI.getDesc().TSFlags & ARMII::FormMask) {
+ default: {
+ llvm_unreachable("Unhandled instruction encoding format!");
+ break;
+ }
+ case ARMII::Pseudo:
emitPseudoInstruction(MI);
- else
- MCE.emitWordLE(getInstrBinary(MI));
+ break;
+ case ARMII::DPFrm:
+ case ARMII::DPSoRegFrm:
+ emitDataProcessingInstruction(MI);
+ break;
+ case ARMII::LdFrm:
+ case ARMII::StFrm:
+ emitLoadStoreInstruction(MI);
+ break;
+ case ARMII::LdMiscFrm:
+ case ARMII::StMiscFrm:
+ emitMiscLoadStoreInstruction(MI);
+ break;
+ case ARMII::LdStMulFrm:
+ emitLoadStoreMultipleInstruction(MI);
+ break;
+ case ARMII::MulFrm:
+ emitMulFrmInstruction(MI);
+ break;
+ case ARMII::ExtFrm:
+ emitExtendInstruction(MI);
+ break;
+ case ARMII::ArithMiscFrm:
+ emitMiscArithInstruction(MI);
+ break;
+ case ARMII::BrFrm:
+ emitBranchInstruction(MI);
+ break;
+ case ARMII::BrMiscFrm:
+ emitMiscBranchInstruction(MI);
+ break;
+ // VFP instructions.
+ case ARMII::VFPUnaryFrm:
+ case ARMII::VFPBinaryFrm:
+ emitVFPArithInstruction(MI);
+ break;
+ case ARMII::VFPConv1Frm:
+ case ARMII::VFPConv2Frm:
+ case ARMII::VFPConv3Frm:
+ case ARMII::VFPConv4Frm:
+ case ARMII::VFPConv5Frm:
+ emitVFPConversionInstruction(MI);
+ break;
+ case ARMII::VFPLdStFrm:
+ emitVFPLoadStoreInstruction(MI);
+ break;
+ case ARMII::VFPLdStMulFrm:
+ emitVFPLoadStoreMultipleInstruction(MI);
+ break;
+ case ARMII::VFPMiscFrm:
+ emitMiscInstruction(MI);
+ break;
+ }
+ MCE.processDebugLoc(MI.getDebugLoc(), false);
}
void ARMCodeEmitter::emitConstPoolInstruction(const MachineInstr &MI) {
- unsigned CPI = MI.getOperand(0).getImm();
- unsigned CPIndex = MI.getOperand(1).getIndex();
+ unsigned CPI = MI.getOperand(0).getImm(); // CP instruction index.
+ unsigned CPIndex = MI.getOperand(1).getIndex(); // Actual cp entry index.
const MachineConstantPoolEntry &MCPE = (*MCPEs)[CPIndex];
-
+
// Remember the CONSTPOOL_ENTRY address for later relocation.
JTI->addConstantPoolEntryAddr(CPI, MCE.getCurrentPCValue());
ARMConstantPoolValue *ACPV =
static_cast<ARMConstantPoolValue*>(MCPE.Val.MachineCPVal);
- DOUT << "\t** ARM constant pool #" << CPI << " @ "
- << (void*)MCE.getCurrentPCValue() << " '" << *ACPV << "'\n";
+ DEBUG(errs() << " ** ARM constant pool #" << CPI << " @ "
+ << (void*)MCE.getCurrentPCValue() << " " << *ACPV << '\n');
- GlobalValue *GV = ACPV->getGV();
+ assert(ACPV->isGlobalValue() && "unsupported constant pool value");
+ const GlobalValue *GV = ACPV->getGV();
if (GV) {
- assert(!ACPV->isStub() && "Don't know how to deal this yet!");
- emitGlobalAddress(GV, ARM::reloc_arm_absolute, false);
- } else {
- assert(!ACPV->isNonLazyPointer() && "Don't know how to deal this yet!");
+ Reloc::Model RelocM = TM.getRelocationModel();
+ emitGlobalAddress(GV, ARM::reloc_arm_machine_cp_entry,
+ isa<Function>(GV),
+ Subtarget->GVIsIndirectSymbol(GV, RelocM),
+ (intptr_t)ACPV);
+ } else {
emitExternalSymbolAddress(ACPV->getSymbol(), ARM::reloc_arm_absolute);
}
- MCE.emitWordLE(0);
+ emitWordLE(0);
} else {
- Constant *CV = MCPE.Val.ConstVal;
-
- DOUT << "\t** Constant pool #" << CPI << " @ "
- << (void*)MCE.getCurrentPCValue() << " '" << *CV << "'\n";
-
- if (GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
- emitGlobalAddress(GV, ARM::reloc_arm_absolute, false);
- MCE.emitWordLE(0);
- } else {
- assert(CV->getType()->isInteger() &&
- "Not expecting non-integer constpool entries yet!");
- const ConstantInt *CI = dyn_cast<ConstantInt>(CV);
+ const Constant *CV = MCPE.Val.ConstVal;
+
+ DEBUG({
+ errs() << " ** Constant pool #" << CPI << " @ "
+ << (void*)MCE.getCurrentPCValue() << " ";
+ if (const Function *F = dyn_cast<Function>(CV))
+ errs() << F->getName();
+ else
+ errs() << *CV;
+ errs() << '\n';
+ });
+
+ if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
+ emitGlobalAddress(GV, ARM::reloc_arm_absolute, isa<Function>(GV), false);
+ emitWordLE(0);
+ } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
uint32_t Val = *(uint32_t*)CI->getValue().getRawData();
- MCE.emitWordLE(Val);
+ emitWordLE(Val);
+ } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
+ if (CFP->getType()->isFloatTy())
+ emitWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
+ else if (CFP->getType()->isDoubleTy())
+ emitDWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
+ else {
+ llvm_unreachable("Unable to handle this constantpool entry!");
+ }
+ } else {
+ llvm_unreachable("Unable to handle this constantpool entry!");
}
}
}
+void ARMCodeEmitter::emitMOVi2piecesInstruction(const MachineInstr &MI) {
+ const MachineOperand &MO0 = MI.getOperand(0);
+ const MachineOperand &MO1 = MI.getOperand(1);
+ assert(MO1.isImm() && ARM_AM::isSOImmTwoPartVal(MO1.getImm()) &&
+ "Not a valid so_imm value!");
+ unsigned V1 = ARM_AM::getSOImmTwoPartFirst(MO1.getImm());
+ unsigned V2 = ARM_AM::getSOImmTwoPartSecond(MO1.getImm());
+
+ // Emit the 'mov' instruction.
+ unsigned Binary = 0xd << 21; // mov: Insts{24-21} = 0b1101
+
+ // Set the conditional execution predicate.
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ // Encode Rd.
+ Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
+
+ // Encode so_imm.
+ // Set bit I(25) to identify this is the immediate form of <shifter_op>
+ Binary |= 1 << ARMII::I_BitShift;
+ Binary |= getMachineSoImmOpValue(V1);
+ emitWordLE(Binary);
+
+ // Now the 'orr' instruction.
+ Binary = 0xc << 21; // orr: Insts{24-21} = 0b1100
+
+ // Set the conditional execution predicate.
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ // Encode Rd.
+ Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
+
+ // Encode Rn.
+ Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRnShift;
+
+ // Encode so_imm.
+ // Set bit I(25) to identify this is the immediate form of <shifter_op>
+ Binary |= 1 << ARMII::I_BitShift;
+ Binary |= getMachineSoImmOpValue(V2);
+ emitWordLE(Binary);
+}
+
+void ARMCodeEmitter::emitLEApcrelJTInstruction(const MachineInstr &MI) {
+ // It's basically add r, pc, (LJTI - $+8)
+
+ const TargetInstrDesc &TID = MI.getDesc();
+
+ // Emit the 'add' instruction.
+ unsigned Binary = 0x4 << 21; // add: Insts{24-31} = 0b0100
+
+ // Set the conditional execution predicate
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ // Encode S bit if MI modifies CPSR.
+ Binary |= getAddrModeSBit(MI, TID);
+
+ // Encode Rd.
+ Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
+
+ // Encode Rn which is PC.
+ Binary |= ARMRegisterInfo::getRegisterNumbering(ARM::PC) << ARMII::RegRnShift;
+
+ // Encode the displacement.
+ Binary |= 1 << ARMII::I_BitShift;
+ emitJumpTableAddress(MI.getOperand(1).getIndex(), ARM::reloc_arm_jt_base);
+
+ emitWordLE(Binary);
+}
+
+void ARMCodeEmitter::emitPseudoMoveInstruction(const MachineInstr &MI) {
+ unsigned Opcode = MI.getDesc().Opcode;
+
+ // Part of binary is determined by TableGn.
+ unsigned Binary = getBinaryCodeForInstr(MI);
+
+ // Set the conditional execution predicate
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ // Encode S bit if MI modifies CPSR.
+ if (Opcode == ARM::MOVsrl_flag || Opcode == ARM::MOVsra_flag)
+ Binary |= 1 << ARMII::S_BitShift;
+
+ // Encode register def if there is one.
+ Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
+
+ // Encode the shift operation.
+ switch (Opcode) {
+ default: break;
+ case ARM::MOVrx:
+ // rrx
+ Binary |= 0x6 << 4;
+ break;
+ case ARM::MOVsrl_flag:
+ // lsr #1
+ Binary |= (0x2 << 4) | (1 << 7);
+ break;
+ case ARM::MOVsra_flag:
+ // asr #1
+ Binary |= (0x4 << 4) | (1 << 7);
+ break;
+ }
+
+ // Encode register Rm.
+ Binary |= getMachineOpValue(MI, 1);
+
+ emitWordLE(Binary);
+}
+
+void ARMCodeEmitter::addPCLabel(unsigned LabelID) {
+ DEBUG(errs() << " ** LPC" << LabelID << " @ "
+ << (void*)MCE.getCurrentPCValue() << '\n');
+ JTI->addPCLabelAddr(LabelID, MCE.getCurrentPCValue());
+}
+
void ARMCodeEmitter::emitPseudoInstruction(const MachineInstr &MI) {
unsigned Opcode = MI.getDesc().Opcode;
switch (Opcode) {
default:
- abort(); // FIXME:
+ llvm_unreachable("ARMCodeEmitter::emitPseudoInstruction");
+ // FIXME: Add support for MOVimm32.
+ case TargetOpcode::INLINEASM: {
+ // We allow inline assembler nodes with empty bodies - they can
+ // implicitly define registers, which is ok for JIT.
+ if (MI.getOperand(0).getSymbolName()[0]) {
+ report_fatal_error("JIT does not support inline asm!");
+ }
+ break;
+ }
+ case TargetOpcode::DBG_LABEL:
+ case TargetOpcode::EH_LABEL:
+ MCE.emitLabel(MI.getOperand(0).getMCSymbol());
+ break;
+ case TargetOpcode::IMPLICIT_DEF:
+ case TargetOpcode::KILL:
+ // Do nothing.
+ break;
case ARM::CONSTPOOL_ENTRY:
emitConstPoolInstruction(MI);
break;
case ARM::PICADD: {
+ // Remember of the address of the PC label for relocation later.
+ addPCLabel(MI.getOperand(2).getImm());
// PICADD is just an add instruction that implicitly read pc.
- unsigned Binary = getBinaryCodeForInstr(MI);
- const TargetInstrDesc &TID = MI.getDesc();
- MCE.emitWordLE(getAddrMode1InstrBinary(MI, TID, Binary));
+ emitDataProcessingInstruction(MI, 0, ARM::PC);
break;
}
- }
-}
-
-
-unsigned ARMCodeEmitter::getAddrModeNoneInstrBinary(const MachineInstr &MI,
- const TargetInstrDesc &TID,
- unsigned Binary) {
- // Set the conditional execution predicate
- Binary |= II->getPredicate(&MI) << 28;
-
- switch (TID.TSFlags & ARMII::FormMask) {
- default:
- assert(0 && "Unknown instruction subtype!");
- break;
- case ARMII::Branch: {
- // Set signed_immed_24 field
- Binary |= getMachineOpValue(MI, 0);
-
- // if it is a conditional branch, set cond field
- if (TID.Opcode == ARM::Bcc) {
- Binary &= 0x0FFFFFFF; // clear conditional field
- Binary |= getMachineOpValue(MI, 1) << 28; // set conditional field
- }
+ case ARM::PICLDR:
+ case ARM::PICLDRB:
+ case ARM::PICSTR:
+ case ARM::PICSTRB: {
+ // Remember of the address of the PC label for relocation later.
+ addPCLabel(MI.getOperand(2).getImm());
+ // These are just load / store instructions that implicitly read pc.
+ emitLoadStoreInstruction(MI, 0, ARM::PC);
break;
}
- case ARMII::BranchMisc: {
- if (TID.Opcode == ARM::BX)
- abort(); // FIXME
- if (TID.Opcode == ARM::BX_RET)
- Binary |= 0xe; // the return register is LR
- else
- // otherwise, set the return register
- Binary |= getMachineOpValue(MI, 0);
+ case ARM::PICLDRH:
+ case ARM::PICLDRSH:
+ case ARM::PICLDRSB:
+ case ARM::PICSTRH: {
+ // Remember of the address of the PC label for relocation later.
+ addPCLabel(MI.getOperand(2).getImm());
+ // These are just load / store instructions that implicitly read pc.
+ emitMiscLoadStoreInstruction(MI, ARM::PC);
break;
}
+ case ARM::MOVi2pieces:
+ // Two instructions to materialize a constant.
+ emitMOVi2piecesInstruction(MI);
+ break;
+ case ARM::LEApcrelJT:
+ // Materialize jumptable address.
+ emitLEApcrelJTInstruction(MI);
+ break;
+ case ARM::MOVrx:
+ case ARM::MOVsrl_flag:
+ case ARM::MOVsra_flag:
+ emitPseudoMoveInstruction(MI);
+ break;
}
-
- return Binary;
}
unsigned ARMCodeEmitter::getMachineSoRegOpValue(const MachineInstr &MI,
// ROR - 0111
// RRX - 0110 and bit[11:8] clear.
switch (SOpc) {
- default: assert(0 && "Unknown shift opc!");
+ default: llvm_unreachable("Unknown shift opc!");
case ARM_AM::lsl: SBits = 0x1; break;
case ARM_AM::lsr: SBits = 0x3; break;
case ARM_AM::asr: SBits = 0x5; break;
// ASR - 100
// ROR - 110
switch (SOpc) {
- default: assert(0 && "Unknown shift opc!");
+ default: llvm_unreachable("Unknown shift opc!");
case ARM_AM::lsl: SBits = 0x0; break;
case ARM_AM::lsr: SBits = 0x2; break;
case ARM_AM::asr: SBits = 0x4; break;
return Binary | ARM_AM::getSORegOffset(MO2.getImm()) << 7;
}
-unsigned ARMCodeEmitter::getMachineSoImmOpValue(const MachineInstr &MI,
- const TargetInstrDesc &TID,
- const MachineOperand &MO) {
- unsigned SoImm = MO.getImm();
+unsigned ARMCodeEmitter::getMachineSoImmOpValue(unsigned SoImm) {
+ int SoImmVal = ARM_AM::getSOImmVal(SoImm);
+ assert(SoImmVal != -1 && "Not a valid so_imm value!");
+
// Encode rotate_imm.
- unsigned Binary = ARM_AM::getSOImmValRot(SoImm) << ARMII::RotImmShift;
+ unsigned Binary = (ARM_AM::getSOImmValRot((unsigned)SoImmVal) >> 1)
+ << ARMII::SoRotImmShift;
+
// Encode immed_8.
- Binary |= ARM_AM::getSOImmVal(SoImm);
+ Binary |= ARM_AM::getSOImmValImm((unsigned)SoImmVal);
return Binary;
}
-unsigned ARMCodeEmitter::getAddrMode1SBit(const MachineInstr &MI,
- const TargetInstrDesc &TID) const {
+unsigned ARMCodeEmitter::getAddrModeSBit(const MachineInstr &MI,
+ const TargetInstrDesc &TID) const {
for (unsigned i = MI.getNumOperands(), e = TID.getNumOperands(); i != e; --i){
const MachineOperand &MO = MI.getOperand(i-1);
if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR)
return 0;
}
-unsigned ARMCodeEmitter::getAddrMode1InstrBinary(const MachineInstr &MI,
- const TargetInstrDesc &TID,
- unsigned Binary) {
+void ARMCodeEmitter::emitDataProcessingInstruction(const MachineInstr &MI,
+ unsigned ImplicitRd,
+ unsigned ImplicitRn) {
+ const TargetInstrDesc &TID = MI.getDesc();
+
+ if (TID.Opcode == ARM::BFC) {
+ report_fatal_error("ARMv6t2 JIT is not yet supported.");
+ }
+
+ // Part of binary is determined by TableGn.
+ unsigned Binary = getBinaryCodeForInstr(MI);
+
// Set the conditional execution predicate
- Binary |= II->getPredicate(&MI) << 28;
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
// Encode S bit if MI modifies CPSR.
- Binary |= getAddrMode1SBit(MI, TID);
+ Binary |= getAddrModeSBit(MI, TID);
// Encode register def if there is one.
unsigned NumDefs = TID.getNumDefs();
unsigned OpIdx = 0;
- if (NumDefs) {
- Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRdShift;
+ if (NumDefs)
+ Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
+ else if (ImplicitRd)
+ // Special handling for implicit use (e.g. PC).
+ Binary |= (ARMRegisterInfo::getRegisterNumbering(ImplicitRd)
+ << ARMII::RegRdShift);
+
+ // If this is a two-address operand, skip it. e.g. MOVCCr operand 1.
+ if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
++OpIdx;
- }
// Encode first non-shifter register operand if there is one.
- unsigned Format = TID.TSFlags & ARMII::FormMask;
- bool HasRnReg = !(Format == ARMII::DPRdMisc ||
- Format == ARMII::DPRdIm ||
- Format == ARMII::DPRdReg ||
- Format == ARMII::DPRdSoReg);
- if (HasRnReg) {
- if (TID.getOpcode() == ARM::PICADD)
- // Special handling for PICADD. It implicitly use add.
- Binary |=
- ARMRegisterInfo::getRegisterNumbering(ARM::PC) << ARMII::RegRnShift;
+ bool isUnary = TID.TSFlags & ARMII::UnaryDP;
+ if (!isUnary) {
+ if (ImplicitRn)
+ // Special handling for implicit use (e.g. PC).
+ Binary |= (ARMRegisterInfo::getRegisterNumbering(ImplicitRn)
+ << ARMII::RegRnShift);
else {
Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRnShift;
++OpIdx;
}
// Encode shifter operand.
- bool HasSoReg = (Format == ARMII::DPRdSoReg ||
- Format == ARMII::DPRnSoReg ||
- Format == ARMII::DPRSoReg ||
- Format == ARMII::DPRSoRegS);
-
const MachineOperand &MO = MI.getOperand(OpIdx);
- if (HasSoReg)
+ if ((TID.TSFlags & ARMII::FormMask) == ARMII::DPSoRegFrm) {
// Encode SoReg.
- return Binary | getMachineSoRegOpValue(MI, TID, MO, OpIdx);
+ emitWordLE(Binary | getMachineSoRegOpValue(MI, TID, MO, OpIdx));
+ return;
+ }
- if (MO.isReg())
+ if (MO.isReg()) {
// Encode register Rm.
- return Binary | ARMRegisterInfo::getRegisterNumbering(MO.getReg());
+ emitWordLE(Binary | ARMRegisterInfo::getRegisterNumbering(MO.getReg()));
+ return;
+ }
// Encode so_imm.
- // Set bit I(25) to identify this is the immediate form of <shifter_op>
- Binary |= 1 << ARMII::I_BitShift;
- Binary |= getMachineSoImmOpValue(MI, TID, MO);
- return Binary;
+ Binary |= getMachineSoImmOpValue((unsigned)MO.getImm());
+
+ emitWordLE(Binary);
}
-unsigned ARMCodeEmitter::getAddrMode2InstrBinary(const MachineInstr &MI,
- const TargetInstrDesc &TID,
- unsigned Binary) {
+void ARMCodeEmitter::emitLoadStoreInstruction(const MachineInstr &MI,
+ unsigned ImplicitRd,
+ unsigned ImplicitRn) {
+ const TargetInstrDesc &TID = MI.getDesc();
+ unsigned Form = TID.TSFlags & ARMII::FormMask;
+ bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
+
+ // Part of binary is determined by TableGn.
+ unsigned Binary = getBinaryCodeForInstr(MI);
+
// Set the conditional execution predicate
- Binary |= II->getPredicate(&MI) << 28;
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ unsigned OpIdx = 0;
+
+ // Operand 0 of a pre- and post-indexed store is the address base
+ // writeback. Skip it.
+ bool Skipped = false;
+ if (IsPrePost && Form == ARMII::StFrm) {
+ ++OpIdx;
+ Skipped = true;
+ }
// Set first operand
- Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
+ if (ImplicitRd)
+ // Special handling for implicit use (e.g. PC).
+ Binary |= (ARMRegisterInfo::getRegisterNumbering(ImplicitRd)
+ << ARMII::RegRdShift);
+ else
+ Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
// Set second operand
- Binary |= getMachineOpValue(MI, 1) << ARMII::RegRnShift;
+ if (ImplicitRn)
+ // Special handling for implicit use (e.g. PC).
+ Binary |= (ARMRegisterInfo::getRegisterNumbering(ImplicitRn)
+ << ARMII::RegRnShift);
+ else
+ Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
- const MachineOperand &MO2 = MI.getOperand(2);
- const MachineOperand &MO3 = MI.getOperand(3);
+ // If this is a two-address operand, skip it. e.g. LDR_PRE.
+ if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
+ ++OpIdx;
+
+ const MachineOperand &MO2 = MI.getOperand(OpIdx);
+ unsigned AM2Opc = (ImplicitRn == ARM::PC)
+ ? 0 : MI.getOperand(OpIdx+1).getImm();
// Set bit U(23) according to sign of immed value (positive or negative).
- Binary |= ((ARM_AM::getAM2Op(MO3.getImm()) == ARM_AM::add ? 1 : 0) <<
+ Binary |= ((ARM_AM::getAM2Op(AM2Opc) == ARM_AM::add ? 1 : 0) <<
ARMII::U_BitShift);
if (!MO2.getReg()) { // is immediate
- if (ARM_AM::getAM2Offset(MO3.getImm()))
+ if (ARM_AM::getAM2Offset(AM2Opc))
// Set the value of offset_12 field
- Binary |= ARM_AM::getAM2Offset(MO3.getImm());
- return Binary;
+ Binary |= ARM_AM::getAM2Offset(AM2Opc);
+ emitWordLE(Binary);
+ return;
}
// Set bit I(25), because this is not in immediate enconding.
// Set bit[3:0] to the corresponding Rm register
Binary |= ARMRegisterInfo::getRegisterNumbering(MO2.getReg());
- // if this instr is in scaled register offset/index instruction, set
+ // If this instr is in scaled register offset/index instruction, set
// shift_immed(bit[11:7]) and shift(bit[6:5]) fields.
- if (unsigned ShImm = ARM_AM::getAM2Offset(MO3.getImm())) {
- Binary |= getShiftOp(MO3) << 5; // shift
- Binary |= ShImm << 7; // shift_immed
+ if (unsigned ShImm = ARM_AM::getAM2Offset(AM2Opc)) {
+ Binary |= getShiftOp(AM2Opc) << ARMII::ShiftImmShift; // shift
+ Binary |= ShImm << ARMII::ShiftShift; // shift_immed
}
- return Binary;
+ emitWordLE(Binary);
}
-unsigned ARMCodeEmitter::getAddrMode3InstrBinary(const MachineInstr &MI,
- const TargetInstrDesc &TID,
- unsigned Binary) {
+void ARMCodeEmitter::emitMiscLoadStoreInstruction(const MachineInstr &MI,
+ unsigned ImplicitRn) {
+ const TargetInstrDesc &TID = MI.getDesc();
+ unsigned Form = TID.TSFlags & ARMII::FormMask;
+ bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
+
+ // Part of binary is determined by TableGn.
+ unsigned Binary = getBinaryCodeForInstr(MI);
+
// Set the conditional execution predicate
- Binary |= II->getPredicate(&MI) << 28;
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ unsigned OpIdx = 0;
+
+ // Operand 0 of a pre- and post-indexed store is the address base
+ // writeback. Skip it.
+ bool Skipped = false;
+ if (IsPrePost && Form == ARMII::StMiscFrm) {
+ ++OpIdx;
+ Skipped = true;
+ }
// Set first operand
- Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
+ Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
+
+ // Skip LDRD and STRD's second operand.
+ if (TID.Opcode == ARM::LDRD || TID.Opcode == ARM::STRD)
+ ++OpIdx;
// Set second operand
- Binary |= getMachineOpValue(MI, 1) << ARMII::RegRnShift;
+ if (ImplicitRn)
+ // Special handling for implicit use (e.g. PC).
+ Binary |= (ARMRegisterInfo::getRegisterNumbering(ImplicitRn)
+ << ARMII::RegRnShift);
+ else
+ Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
- const MachineOperand &MO2 = MI.getOperand(2);
- const MachineOperand &MO3 = MI.getOperand(3);
+ // If this is a two-address operand, skip it. e.g. LDRH_POST.
+ if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
+ ++OpIdx;
+
+ const MachineOperand &MO2 = MI.getOperand(OpIdx);
+ unsigned AM3Opc = (ImplicitRn == ARM::PC)
+ ? 0 : MI.getOperand(OpIdx+1).getImm();
// Set bit U(23) according to sign of immed value (positive or negative)
- Binary |= ((ARM_AM::getAM2Op(MO3.getImm()) == ARM_AM::add ? 1 : 0) <<
+ Binary |= ((ARM_AM::getAM3Op(AM3Opc) == ARM_AM::add ? 1 : 0) <<
ARMII::U_BitShift);
// If this instr is in register offset/index encoding, set bit[3:0]
// to the corresponding Rm register.
if (MO2.getReg()) {
Binary |= ARMRegisterInfo::getRegisterNumbering(MO2.getReg());
- return Binary;
+ emitWordLE(Binary);
+ return;
}
- // if this instr is in immediate offset/index encoding, set bit 22 to 1
- if (unsigned ImmOffs = ARM_AM::getAM3Offset(MO3.getImm())) {
- Binary |= 1 << 22;
+ // This instr is in immediate offset/index encoding, set bit 22 to 1.
+ Binary |= 1 << ARMII::AM3_I_BitShift;
+ if (unsigned ImmOffs = ARM_AM::getAM3Offset(AM3Opc)) {
// Set operands
- Binary |= (ImmOffs >> 4) << 8; // immedH
- Binary |= (ImmOffs & ~0xF); // immedL
+ Binary |= (ImmOffs >> 4) << ARMII::ImmHiShift; // immedH
+ Binary |= (ImmOffs & 0xF); // immedL
}
- return Binary;
+ emitWordLE(Binary);
}
-unsigned ARMCodeEmitter::getAddrMode4InstrBinary(const MachineInstr &MI,
- const TargetInstrDesc &TID,
- unsigned Binary) {
- // Set the conditional execution predicate
- Binary |= II->getPredicate(&MI) << 28;
-
- // Set first operand
- Binary |= getMachineOpValue(MI, 0) << ARMII::RegRnShift;
+static unsigned getAddrModeUPBits(unsigned Mode) {
+ unsigned Binary = 0;
// Set addressing mode by modifying bits U(23) and P(24)
// IA - Increment after - bit U = 1 and bit P = 0
// IB - Increment before - bit U = 1 and bit P = 1
// DA - Decrement after - bit U = 0 and bit P = 0
// DB - Decrement before - bit U = 0 and bit P = 1
- const MachineOperand &MO = MI.getOperand(1);
- ARM_AM::AMSubMode Mode = ARM_AM::getAM4SubMode(MO.getImm());
switch (Mode) {
- default: assert(0 && "Unknown addressing sub-mode!");
- case ARM_AM::da: break;
- case ARM_AM::db: Binary |= 0x1 << 24; break;
- case ARM_AM::ia: Binary |= 0x1 << 23; break;
- case ARM_AM::ib: Binary |= 0x3 << 23; break;
+ default: llvm_unreachable("Unknown addressing sub-mode!");
+ case ARM_AM::da: break;
+ case ARM_AM::db: Binary |= 0x1 << ARMII::P_BitShift; break;
+ case ARM_AM::ia: Binary |= 0x1 << ARMII::U_BitShift; break;
+ case ARM_AM::ib: Binary |= 0x3 << ARMII::U_BitShift; break;
}
+ return Binary;
+}
+
+void ARMCodeEmitter::emitLoadStoreMultipleInstruction(const MachineInstr &MI) {
+ const TargetInstrDesc &TID = MI.getDesc();
+ bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
+
+ // Part of binary is determined by TableGn.
+ unsigned Binary = getBinaryCodeForInstr(MI);
+
+ // Set the conditional execution predicate
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ // Skip operand 0 of an instruction with base register update.
+ unsigned OpIdx = 0;
+ if (IsUpdating)
+ ++OpIdx;
+
+ // Set base address operand
+ Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
+
+ // Set addressing mode by modifying bits U(23) and P(24)
+ const MachineOperand &MO = MI.getOperand(OpIdx++);
+ Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(MO.getImm()));
+
// Set bit W(21)
- if (ARM_AM::getAM4WBFlag(MO.getImm()))
- Binary |= 0x1 << 21;
+ if (IsUpdating)
+ Binary |= 0x1 << ARMII::W_BitShift;
// Set registers
- for (unsigned i = 4, e = MI.getNumOperands(); i != e; ++i) {
+ for (unsigned i = OpIdx+2, e = MI.getNumOperands(); i != e; ++i) {
const MachineOperand &MO = MI.getOperand(i);
- if (MO.isReg() && MO.isImplicit())
- continue;
+ if (!MO.isReg() || MO.isImplicit())
+ break;
unsigned RegNum = ARMRegisterInfo::getRegisterNumbering(MO.getReg());
assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
RegNum < 16);
Binary |= 0x1 << RegNum;
}
+ emitWordLE(Binary);
+}
+
+void ARMCodeEmitter::emitMulFrmInstruction(const MachineInstr &MI) {
+ const TargetInstrDesc &TID = MI.getDesc();
+
+ // Part of binary is determined by TableGn.
+ unsigned Binary = getBinaryCodeForInstr(MI);
+
+ // Set the conditional execution predicate
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ // Encode S bit if MI modifies CPSR.
+ Binary |= getAddrModeSBit(MI, TID);
+
+ // 32x32->64bit operations have two destination registers. The number
+ // of register definitions will tell us if that's what we're dealing with.
+ unsigned OpIdx = 0;
+ if (TID.getNumDefs() == 2)
+ Binary |= getMachineOpValue (MI, OpIdx++) << ARMII::RegRdLoShift;
+
+ // Encode Rd
+ Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdHiShift;
+
+ // Encode Rm
+ Binary |= getMachineOpValue(MI, OpIdx++);
+
+ // Encode Rs
+ Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRsShift;
+
+ // Many multiple instructions (e.g. MLA) have three src operands. Encode
+ // it as Rn (for multiply, that's in the same offset as RdLo.
+ if (TID.getNumOperands() > OpIdx &&
+ !TID.OpInfo[OpIdx].isPredicate() &&
+ !TID.OpInfo[OpIdx].isOptionalDef())
+ Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRdLoShift;
+
+ emitWordLE(Binary);
+}
+
+void ARMCodeEmitter::emitExtendInstruction(const MachineInstr &MI) {
+ const TargetInstrDesc &TID = MI.getDesc();
+
+ // Part of binary is determined by TableGn.
+ unsigned Binary = getBinaryCodeForInstr(MI);
+
+ // Set the conditional execution predicate
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ unsigned OpIdx = 0;
+
+ // Encode Rd
+ Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
+
+ const MachineOperand &MO1 = MI.getOperand(OpIdx++);
+ const MachineOperand &MO2 = MI.getOperand(OpIdx);
+ if (MO2.isReg()) {
+ // Two register operand form.
+ // Encode Rn.
+ Binary |= getMachineOpValue(MI, MO1) << ARMII::RegRnShift;
+
+ // Encode Rm.
+ Binary |= getMachineOpValue(MI, MO2);
+ ++OpIdx;
+ } else {
+ Binary |= getMachineOpValue(MI, MO1);
+ }
+
+ // Encode rot imm (0, 8, 16, or 24) if it has a rotate immediate operand.
+ if (MI.getOperand(OpIdx).isImm() &&
+ !TID.OpInfo[OpIdx].isPredicate() &&
+ !TID.OpInfo[OpIdx].isOptionalDef())
+ Binary |= (getMachineOpValue(MI, OpIdx) / 8) << ARMII::ExtRotImmShift;
+
+ emitWordLE(Binary);
+}
+
+void ARMCodeEmitter::emitMiscArithInstruction(const MachineInstr &MI) {
+ const TargetInstrDesc &TID = MI.getDesc();
+
+ // Part of binary is determined by TableGn.
+ unsigned Binary = getBinaryCodeForInstr(MI);
+
+ // Set the conditional execution predicate
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ unsigned OpIdx = 0;
+
+ // Encode Rd
+ Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
+
+ const MachineOperand &MO = MI.getOperand(OpIdx++);
+ if (OpIdx == TID.getNumOperands() ||
+ TID.OpInfo[OpIdx].isPredicate() ||
+ TID.OpInfo[OpIdx].isOptionalDef()) {
+ // Encode Rm and it's done.
+ Binary |= getMachineOpValue(MI, MO);
+ emitWordLE(Binary);
+ return;
+ }
+
+ // Encode Rn.
+ Binary |= getMachineOpValue(MI, MO) << ARMII::RegRnShift;
+
+ // Encode Rm.
+ Binary |= getMachineOpValue(MI, OpIdx++);
+
+ // Encode shift_imm.
+ unsigned ShiftAmt = MI.getOperand(OpIdx).getImm();
+ assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
+ Binary |= ShiftAmt << ARMII::ShiftShift;
+
+ emitWordLE(Binary);
+}
+
+void ARMCodeEmitter::emitBranchInstruction(const MachineInstr &MI) {
+ const TargetInstrDesc &TID = MI.getDesc();
+
+ if (TID.Opcode == ARM::TPsoft) {
+ llvm_unreachable("ARM::TPsoft FIXME"); // FIXME
+ }
+
+ // Part of binary is determined by TableGn.
+ unsigned Binary = getBinaryCodeForInstr(MI);
+
+ // Set the conditional execution predicate
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ // Set signed_immed_24 field
+ Binary |= getMachineOpValue(MI, 0);
+
+ emitWordLE(Binary);
+}
+
+void ARMCodeEmitter::emitInlineJumpTable(unsigned JTIndex) {
+ // Remember the base address of the inline jump table.
+ uintptr_t JTBase = MCE.getCurrentPCValue();
+ JTI->addJumpTableBaseAddr(JTIndex, JTBase);
+ DEBUG(errs() << " ** Jump Table #" << JTIndex << " @ " << (void*)JTBase
+ << '\n');
+
+ // Now emit the jump table entries.
+ const std::vector<MachineBasicBlock*> &MBBs = (*MJTEs)[JTIndex].MBBs;
+ for (unsigned i = 0, e = MBBs.size(); i != e; ++i) {
+ if (IsPIC)
+ // DestBB address - JT base.
+ emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_pic_jt, JTBase);
+ else
+ // Absolute DestBB address.
+ emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_absolute);
+ emitWordLE(0);
+ }
+}
+
+void ARMCodeEmitter::emitMiscBranchInstruction(const MachineInstr &MI) {
+ const TargetInstrDesc &TID = MI.getDesc();
+
+ // Handle jump tables.
+ if (TID.Opcode == ARM::BR_JTr || TID.Opcode == ARM::BR_JTadd) {
+ // First emit a ldr pc, [] instruction.
+ emitDataProcessingInstruction(MI, ARM::PC);
+
+ // Then emit the inline jump table.
+ unsigned JTIndex =
+ (TID.Opcode == ARM::BR_JTr)
+ ? MI.getOperand(1).getIndex() : MI.getOperand(2).getIndex();
+ emitInlineJumpTable(JTIndex);
+ return;
+ } else if (TID.Opcode == ARM::BR_JTm) {
+ // First emit a ldr pc, [] instruction.
+ emitLoadStoreInstruction(MI, ARM::PC);
+
+ // Then emit the inline jump table.
+ emitInlineJumpTable(MI.getOperand(3).getIndex());
+ return;
+ }
+
+ // Part of binary is determined by TableGn.
+ unsigned Binary = getBinaryCodeForInstr(MI);
+
+ // Set the conditional execution predicate
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ if (TID.Opcode == ARM::BX_RET || TID.Opcode == ARM::MOVPCLR)
+ // The return register is LR.
+ Binary |= ARMRegisterInfo::getRegisterNumbering(ARM::LR);
+ else
+ // otherwise, set the return register
+ Binary |= getMachineOpValue(MI, 0);
+
+ emitWordLE(Binary);
+}
+
+static unsigned encodeVFPRd(const MachineInstr &MI, unsigned OpIdx) {
+ unsigned RegD = MI.getOperand(OpIdx).getReg();
+ unsigned Binary = 0;
+ bool isSPVFP = false;
+ RegD = ARMRegisterInfo::getRegisterNumbering(RegD, &isSPVFP);
+ if (!isSPVFP)
+ Binary |= RegD << ARMII::RegRdShift;
+ else {
+ Binary |= ((RegD & 0x1E) >> 1) << ARMII::RegRdShift;
+ Binary |= (RegD & 0x01) << ARMII::D_BitShift;
+ }
+ return Binary;
+}
+
+static unsigned encodeVFPRn(const MachineInstr &MI, unsigned OpIdx) {
+ unsigned RegN = MI.getOperand(OpIdx).getReg();
+ unsigned Binary = 0;
+ bool isSPVFP = false;
+ RegN = ARMRegisterInfo::getRegisterNumbering(RegN, &isSPVFP);
+ if (!isSPVFP)
+ Binary |= RegN << ARMII::RegRnShift;
+ else {
+ Binary |= ((RegN & 0x1E) >> 1) << ARMII::RegRnShift;
+ Binary |= (RegN & 0x01) << ARMII::N_BitShift;
+ }
return Binary;
}
-/// getInstrBinary - Return binary encoding for the specified
-/// machine instruction.
-unsigned ARMCodeEmitter::getInstrBinary(const MachineInstr &MI) {
+static unsigned encodeVFPRm(const MachineInstr &MI, unsigned OpIdx) {
+ unsigned RegM = MI.getOperand(OpIdx).getReg();
+ unsigned Binary = 0;
+ bool isSPVFP = false;
+ RegM = ARMRegisterInfo::getRegisterNumbering(RegM, &isSPVFP);
+ if (!isSPVFP)
+ Binary |= RegM;
+ else {
+ Binary |= ((RegM & 0x1E) >> 1);
+ Binary |= (RegM & 0x01) << ARMII::M_BitShift;
+ }
+ return Binary;
+}
+
+void ARMCodeEmitter::emitVFPArithInstruction(const MachineInstr &MI) {
+ const TargetInstrDesc &TID = MI.getDesc();
+
// Part of binary is determined by TableGn.
unsigned Binary = getBinaryCodeForInstr(MI);
+ // Set the conditional execution predicate
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ unsigned OpIdx = 0;
+ assert((Binary & ARMII::D_BitShift) == 0 &&
+ (Binary & ARMII::N_BitShift) == 0 &&
+ (Binary & ARMII::M_BitShift) == 0 && "VFP encoding bug!");
+
+ // Encode Dd / Sd.
+ Binary |= encodeVFPRd(MI, OpIdx++);
+
+ // If this is a two-address operand, skip it, e.g. FMACD.
+ if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
+ ++OpIdx;
+
+ // Encode Dn / Sn.
+ if ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPBinaryFrm)
+ Binary |= encodeVFPRn(MI, OpIdx++);
+
+ if (OpIdx == TID.getNumOperands() ||
+ TID.OpInfo[OpIdx].isPredicate() ||
+ TID.OpInfo[OpIdx].isOptionalDef()) {
+ // FCMPEZD etc. has only one operand.
+ emitWordLE(Binary);
+ return;
+ }
+
+ // Encode Dm / Sm.
+ Binary |= encodeVFPRm(MI, OpIdx);
+
+ emitWordLE(Binary);
+}
+
+void ARMCodeEmitter::emitVFPConversionInstruction(const MachineInstr &MI) {
const TargetInstrDesc &TID = MI.getDesc();
- switch (TID.TSFlags & ARMII::AddrModeMask) {
- case ARMII::AddrModeNone:
- return getAddrModeNoneInstrBinary(MI, TID, Binary);
- case ARMII::AddrMode1:
- return getAddrMode1InstrBinary(MI, TID, Binary);
- case ARMII::AddrMode2:
- return getAddrMode2InstrBinary(MI, TID, Binary);
- case ARMII::AddrMode3:
- return getAddrMode3InstrBinary(MI, TID, Binary);
- case ARMII::AddrMode4:
- return getAddrMode4InstrBinary(MI, TID, Binary);
- }
-
- abort();
- return 0;
+ unsigned Form = TID.TSFlags & ARMII::FormMask;
+
+ // Part of binary is determined by TableGn.
+ unsigned Binary = getBinaryCodeForInstr(MI);
+
+ // Set the conditional execution predicate
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ switch (Form) {
+ default: break;
+ case ARMII::VFPConv1Frm:
+ case ARMII::VFPConv2Frm:
+ case ARMII::VFPConv3Frm:
+ // Encode Dd / Sd.
+ Binary |= encodeVFPRd(MI, 0);
+ break;
+ case ARMII::VFPConv4Frm:
+ // Encode Dn / Sn.
+ Binary |= encodeVFPRn(MI, 0);
+ break;
+ case ARMII::VFPConv5Frm:
+ // Encode Dm / Sm.
+ Binary |= encodeVFPRm(MI, 0);
+ break;
+ }
+
+ switch (Form) {
+ default: break;
+ case ARMII::VFPConv1Frm:
+ // Encode Dm / Sm.
+ Binary |= encodeVFPRm(MI, 1);
+ break;
+ case ARMII::VFPConv2Frm:
+ case ARMII::VFPConv3Frm:
+ // Encode Dn / Sn.
+ Binary |= encodeVFPRn(MI, 1);
+ break;
+ case ARMII::VFPConv4Frm:
+ case ARMII::VFPConv5Frm:
+ // Encode Dd / Sd.
+ Binary |= encodeVFPRd(MI, 1);
+ break;
+ }
+
+ if (Form == ARMII::VFPConv5Frm)
+ // Encode Dn / Sn.
+ Binary |= encodeVFPRn(MI, 2);
+ else if (Form == ARMII::VFPConv3Frm)
+ // Encode Dm / Sm.
+ Binary |= encodeVFPRm(MI, 2);
+
+ emitWordLE(Binary);
+}
+
+void ARMCodeEmitter::emitVFPLoadStoreInstruction(const MachineInstr &MI) {
+ // Part of binary is determined by TableGn.
+ unsigned Binary = getBinaryCodeForInstr(MI);
+
+ // Set the conditional execution predicate
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ unsigned OpIdx = 0;
+
+ // Encode Dd / Sd.
+ Binary |= encodeVFPRd(MI, OpIdx++);
+
+ // Encode address base.
+ const MachineOperand &Base = MI.getOperand(OpIdx++);
+ Binary |= getMachineOpValue(MI, Base) << ARMII::RegRnShift;
+
+ // If there is a non-zero immediate offset, encode it.
+ if (Base.isReg()) {
+ const MachineOperand &Offset = MI.getOperand(OpIdx);
+ if (unsigned ImmOffs = ARM_AM::getAM5Offset(Offset.getImm())) {
+ if (ARM_AM::getAM5Op(Offset.getImm()) == ARM_AM::add)
+ Binary |= 1 << ARMII::U_BitShift;
+ Binary |= ImmOffs;
+ emitWordLE(Binary);
+ return;
+ }
+ }
+
+ // If immediate offset is omitted, default to +0.
+ Binary |= 1 << ARMII::U_BitShift;
+
+ emitWordLE(Binary);
+}
+
+void
+ARMCodeEmitter::emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI) {
+ const TargetInstrDesc &TID = MI.getDesc();
+ bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
+
+ // Part of binary is determined by TableGn.
+ unsigned Binary = getBinaryCodeForInstr(MI);
+
+ // Set the conditional execution predicate
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ // Skip operand 0 of an instruction with base register update.
+ unsigned OpIdx = 0;
+ if (IsUpdating)
+ ++OpIdx;
+
+ // Set base address operand
+ Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
+
+ // Set addressing mode by modifying bits U(23) and P(24)
+ const MachineOperand &MO = MI.getOperand(OpIdx++);
+ Binary |= getAddrModeUPBits(ARM_AM::getAM5SubMode(MO.getImm()));
+
+ // Set bit W(21)
+ if (IsUpdating)
+ Binary |= 0x1 << ARMII::W_BitShift;
+
+ // First register is encoded in Dd.
+ Binary |= encodeVFPRd(MI, OpIdx+2);
+
+ // Number of registers are encoded in offset field.
+ unsigned NumRegs = 1;
+ for (unsigned i = OpIdx+3, e = MI.getNumOperands(); i != e; ++i) {
+ const MachineOperand &MO = MI.getOperand(i);
+ if (!MO.isReg() || MO.isImplicit())
+ break;
+ ++NumRegs;
+ }
+ Binary |= NumRegs * 2;
+
+ emitWordLE(Binary);
+}
+
+void ARMCodeEmitter::emitMiscInstruction(const MachineInstr &MI) {
+ // Part of binary is determined by TableGn.
+ unsigned Binary = getBinaryCodeForInstr(MI);
+
+ // Set the conditional execution predicate
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ emitWordLE(Binary);
}
#include "ARMGenCodeEmitter.inc"