1 //===-- ARM/ARMCodeEmitter.cpp - Convert ARM code to machine code ---------===//
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 the pass that transforms the ARM machine instructions into
11 // relocatable machine code.
13 //===----------------------------------------------------------------------===//
15 #define DEBUG_TYPE "jit"
17 #include "ARMAddressingModes.h"
18 #include "ARMConstantPoolValue.h"
19 #include "ARMInstrInfo.h"
20 #include "ARMRelocations.h"
21 #include "ARMSubtarget.h"
22 #include "ARMTargetMachine.h"
23 #include "llvm/Constants.h"
24 #include "llvm/DerivedTypes.h"
25 #include "llvm/Function.h"
26 #include "llvm/PassManager.h"
27 #include "llvm/CodeGen/JITCodeEmitter.h"
28 #include "llvm/CodeGen/MachineConstantPool.h"
29 #include "llvm/CodeGen/MachineFunctionPass.h"
30 #include "llvm/CodeGen/MachineInstr.h"
31 #include "llvm/CodeGen/MachineJumpTableInfo.h"
32 #include "llvm/CodeGen/MachineModuleInfo.h"
33 #include "llvm/CodeGen/Passes.h"
34 #include "llvm/ADT/Statistic.h"
35 #include "llvm/Support/Debug.h"
36 #include "llvm/Support/ErrorHandling.h"
37 #include "llvm/Support/raw_ostream.h"
43 STATISTIC(NumEmitted, "Number of machine instructions emitted");
47 class ARMCodeEmitter : public MachineFunctionPass {
49 const ARMInstrInfo *II;
51 const ARMSubtarget *Subtarget;
54 MachineModuleInfo *MMI;
55 const std::vector<MachineConstantPoolEntry> *MCPEs;
56 const std::vector<MachineJumpTableEntry> *MJTEs;
60 void getAnalysisUsage(AnalysisUsage &AU) const {
61 AU.addRequired<MachineModuleInfo>();
62 MachineFunctionPass::getAnalysisUsage(AU);
67 ARMCodeEmitter(TargetMachine &tm, JITCodeEmitter &mce)
68 : MachineFunctionPass(ID), JTI(0),
69 II((const ARMInstrInfo *)tm.getInstrInfo()),
70 TD(tm.getTargetData()), TM(tm),
71 MCE(mce), MCPEs(0), MJTEs(0),
72 IsPIC(TM.getRelocationModel() == Reloc::PIC_), IsThumb(false) {}
74 /// getBinaryCodeForInstr - This function, generated by the
75 /// CodeEmitterGenerator using TableGen, produces the binary encoding for
76 /// machine instructions.
77 unsigned getBinaryCodeForInstr(const MachineInstr &MI) const;
79 bool runOnMachineFunction(MachineFunction &MF);
81 virtual const char *getPassName() const {
82 return "ARM Machine Code Emitter";
85 void emitInstruction(const MachineInstr &MI);
89 void emitWordLE(unsigned Binary);
90 void emitDWordLE(uint64_t Binary);
91 void emitConstPoolInstruction(const MachineInstr &MI);
92 void emitMOVi32immInstruction(const MachineInstr &MI);
93 void emitMOVi2piecesInstruction(const MachineInstr &MI);
94 void emitLEApcrelJTInstruction(const MachineInstr &MI);
95 void emitPseudoMoveInstruction(const MachineInstr &MI);
96 void addPCLabel(unsigned LabelID);
97 void emitPseudoInstruction(const MachineInstr &MI);
98 unsigned getMachineSoRegOpValue(const MachineInstr &MI,
99 const TargetInstrDesc &TID,
100 const MachineOperand &MO,
103 unsigned getMachineSoImmOpValue(unsigned SoImm);
105 unsigned getAddrModeSBit(const MachineInstr &MI,
106 const TargetInstrDesc &TID) const;
108 void emitDataProcessingInstruction(const MachineInstr &MI,
109 unsigned ImplicitRd = 0,
110 unsigned ImplicitRn = 0);
112 void emitLoadStoreInstruction(const MachineInstr &MI,
113 unsigned ImplicitRd = 0,
114 unsigned ImplicitRn = 0);
116 void emitMiscLoadStoreInstruction(const MachineInstr &MI,
117 unsigned ImplicitRn = 0);
119 void emitLoadStoreMultipleInstruction(const MachineInstr &MI);
121 void emitMulFrmInstruction(const MachineInstr &MI);
123 void emitExtendInstruction(const MachineInstr &MI);
125 void emitMiscArithInstruction(const MachineInstr &MI);
127 void emitSaturateInstruction(const MachineInstr &MI);
129 void emitBranchInstruction(const MachineInstr &MI);
131 void emitInlineJumpTable(unsigned JTIndex);
133 void emitMiscBranchInstruction(const MachineInstr &MI);
135 void emitVFPArithInstruction(const MachineInstr &MI);
137 void emitVFPConversionInstruction(const MachineInstr &MI);
139 void emitVFPLoadStoreInstruction(const MachineInstr &MI);
141 void emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI);
143 void emitMiscInstruction(const MachineInstr &MI);
145 void emitNEONLaneInstruction(const MachineInstr &MI);
146 void emitNEONDupInstruction(const MachineInstr &MI);
147 void emitNEON1RegModImmInstruction(const MachineInstr &MI);
148 void emitNEON2RegInstruction(const MachineInstr &MI);
149 void emitNEON3RegInstruction(const MachineInstr &MI);
151 /// getMachineOpValue - Return binary encoding of operand. If the machine
152 /// operand requires relocation, record the relocation and return zero.
153 unsigned getMachineOpValue(const MachineInstr &MI,
154 const MachineOperand &MO) const;
155 unsigned getMachineOpValue(const MachineInstr &MI, unsigned OpIdx) const {
156 return getMachineOpValue(MI, MI.getOperand(OpIdx));
159 // FIXME: The legacy JIT ARMCodeEmitter doesn't rely on the the
160 // TableGen'erated getBinaryCodeForInstr() function to encode any
161 // operand values, instead querying getMachineOpValue() directly for
162 // each operand it needs to encode. Thus, any of the new encoder
163 // helper functions can simply return 0 as the values the return
164 // are already handled elsewhere. They are placeholders to allow this
165 // encoder to continue to function until the MC encoder is sufficiently
166 // far along that this one can be eliminated entirely.
167 unsigned getCCOutOpValue(const MachineInstr &MI, unsigned Op)
169 unsigned getSOImmOpValue(const MachineInstr &MI, unsigned Op)
172 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
173 /// machine operand requires relocation, record the relocation and return
175 unsigned getMovi32Value(const MachineInstr &MI,const MachineOperand &MO,
178 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
180 unsigned getShiftOp(unsigned Imm) const ;
182 /// Routines that handle operands which add machine relocations which are
183 /// fixed up by the relocation stage.
184 void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
185 bool MayNeedFarStub, bool Indirect,
186 intptr_t ACPV = 0) const;
187 void emitExternalSymbolAddress(const char *ES, unsigned Reloc) const;
188 void emitConstPoolAddress(unsigned CPI, unsigned Reloc) const;
189 void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const;
190 void emitMachineBasicBlock(MachineBasicBlock *BB, unsigned Reloc,
191 intptr_t JTBase = 0) const;
195 char ARMCodeEmitter::ID = 0;
197 /// createARMJITCodeEmitterPass - Return a pass that emits the collected ARM
198 /// code to the specified MCE object.
199 FunctionPass *llvm::createARMJITCodeEmitterPass(ARMBaseTargetMachine &TM,
200 JITCodeEmitter &JCE) {
201 return new ARMCodeEmitter(TM, JCE);
204 bool ARMCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
205 assert((MF.getTarget().getRelocationModel() != Reloc::Default ||
206 MF.getTarget().getRelocationModel() != Reloc::Static) &&
207 "JIT relocation model must be set to static or default!");
208 JTI = ((ARMTargetMachine &)MF.getTarget()).getJITInfo();
209 II = ((const ARMTargetMachine &)MF.getTarget()).getInstrInfo();
210 TD = ((const ARMTargetMachine &)MF.getTarget()).getTargetData();
211 Subtarget = &TM.getSubtarget<ARMSubtarget>();
212 MCPEs = &MF.getConstantPool()->getConstants();
214 if (MF.getJumpTableInfo()) MJTEs = &MF.getJumpTableInfo()->getJumpTables();
215 IsPIC = TM.getRelocationModel() == Reloc::PIC_;
216 IsThumb = MF.getInfo<ARMFunctionInfo>()->isThumbFunction();
217 JTI->Initialize(MF, IsPIC);
218 MMI = &getAnalysis<MachineModuleInfo>();
219 MCE.setModuleInfo(MMI);
222 DEBUG(errs() << "JITTing function '"
223 << MF.getFunction()->getName() << "'\n");
224 MCE.startFunction(MF);
225 for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
227 MCE.StartMachineBasicBlock(MBB);
228 for (MachineBasicBlock::const_iterator I = MBB->begin(), E = MBB->end();
232 } while (MCE.finishFunction(MF));
237 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
239 unsigned ARMCodeEmitter::getShiftOp(unsigned Imm) const {
240 switch (ARM_AM::getAM2ShiftOpc(Imm)) {
241 default: llvm_unreachable("Unknown shift opc!");
242 case ARM_AM::asr: return 2;
243 case ARM_AM::lsl: return 0;
244 case ARM_AM::lsr: return 1;
246 case ARM_AM::rrx: return 3;
251 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
252 /// machine operand requires relocation, record the relocation and return zero.
253 unsigned ARMCodeEmitter::getMovi32Value(const MachineInstr &MI,
254 const MachineOperand &MO,
256 assert(((Reloc == ARM::reloc_arm_movt) || (Reloc == ARM::reloc_arm_movw))
257 && "Relocation to this function should be for movt or movw");
260 return static_cast<unsigned>(MO.getImm());
261 else if (MO.isGlobal())
262 emitGlobalAddress(MO.getGlobal(), Reloc, true, false);
263 else if (MO.isSymbol())
264 emitExternalSymbolAddress(MO.getSymbolName(), Reloc);
266 emitMachineBasicBlock(MO.getMBB(), Reloc);
271 llvm_unreachable("Unsupported operand type for movw/movt");
276 /// getMachineOpValue - Return binary encoding of operand. If the machine
277 /// operand requires relocation, record the relocation and return zero.
278 unsigned ARMCodeEmitter::getMachineOpValue(const MachineInstr &MI,
279 const MachineOperand &MO) const {
281 return getARMRegisterNumbering(MO.getReg());
283 return static_cast<unsigned>(MO.getImm());
284 else if (MO.isGlobal())
285 emitGlobalAddress(MO.getGlobal(), ARM::reloc_arm_branch, true, false);
286 else if (MO.isSymbol())
287 emitExternalSymbolAddress(MO.getSymbolName(), ARM::reloc_arm_branch);
288 else if (MO.isCPI()) {
289 const TargetInstrDesc &TID = MI.getDesc();
290 // For VFP load, the immediate offset is multiplied by 4.
291 unsigned Reloc = ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPLdStFrm)
292 ? ARM::reloc_arm_vfp_cp_entry : ARM::reloc_arm_cp_entry;
293 emitConstPoolAddress(MO.getIndex(), Reloc);
294 } else if (MO.isJTI())
295 emitJumpTableAddress(MO.getIndex(), ARM::reloc_arm_relative);
297 emitMachineBasicBlock(MO.getMBB(), ARM::reloc_arm_branch);
307 /// emitGlobalAddress - Emit the specified address to the code stream.
309 void ARMCodeEmitter::emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
310 bool MayNeedFarStub, bool Indirect,
311 intptr_t ACPV) const {
312 MachineRelocation MR = Indirect
313 ? MachineRelocation::getIndirectSymbol(MCE.getCurrentPCOffset(), Reloc,
314 const_cast<GlobalValue *>(GV),
315 ACPV, MayNeedFarStub)
316 : MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc,
317 const_cast<GlobalValue *>(GV), ACPV,
319 MCE.addRelocation(MR);
322 /// emitExternalSymbolAddress - Arrange for the address of an external symbol to
323 /// be emitted to the current location in the function, and allow it to be PC
325 void ARMCodeEmitter::
326 emitExternalSymbolAddress(const char *ES, unsigned Reloc) const {
327 MCE.addRelocation(MachineRelocation::getExtSym(MCE.getCurrentPCOffset(),
331 /// emitConstPoolAddress - Arrange for the address of an constant pool
332 /// to be emitted to the current location in the function, and allow it to be PC
334 void ARMCodeEmitter::emitConstPoolAddress(unsigned CPI, unsigned Reloc) const {
335 // Tell JIT emitter we'll resolve the address.
336 MCE.addRelocation(MachineRelocation::getConstPool(MCE.getCurrentPCOffset(),
337 Reloc, CPI, 0, true));
340 /// emitJumpTableAddress - Arrange for the address of a jump table to
341 /// be emitted to the current location in the function, and allow it to be PC
343 void ARMCodeEmitter::
344 emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const {
345 MCE.addRelocation(MachineRelocation::getJumpTable(MCE.getCurrentPCOffset(),
346 Reloc, JTIndex, 0, true));
349 /// emitMachineBasicBlock - Emit the specified address basic block.
350 void ARMCodeEmitter::emitMachineBasicBlock(MachineBasicBlock *BB,
352 intptr_t JTBase) const {
353 MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(),
357 void ARMCodeEmitter::emitWordLE(unsigned Binary) {
358 DEBUG(errs() << " 0x";
359 errs().write_hex(Binary) << "\n");
360 MCE.emitWordLE(Binary);
363 void ARMCodeEmitter::emitDWordLE(uint64_t Binary) {
364 DEBUG(errs() << " 0x";
365 errs().write_hex(Binary) << "\n");
366 MCE.emitDWordLE(Binary);
369 void ARMCodeEmitter::emitInstruction(const MachineInstr &MI) {
370 DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << MI);
372 MCE.processDebugLoc(MI.getDebugLoc(), true);
374 ++NumEmitted; // Keep track of the # of mi's emitted
375 switch (MI.getDesc().TSFlags & ARMII::FormMask) {
377 llvm_unreachable("Unhandled instruction encoding format!");
381 emitPseudoInstruction(MI);
384 case ARMII::DPSoRegFrm:
385 emitDataProcessingInstruction(MI);
389 emitLoadStoreInstruction(MI);
391 case ARMII::LdMiscFrm:
392 case ARMII::StMiscFrm:
393 emitMiscLoadStoreInstruction(MI);
395 case ARMII::LdStMulFrm:
396 emitLoadStoreMultipleInstruction(MI);
399 emitMulFrmInstruction(MI);
402 emitExtendInstruction(MI);
404 case ARMII::ArithMiscFrm:
405 emitMiscArithInstruction(MI);
408 emitSaturateInstruction(MI);
411 emitBranchInstruction(MI);
413 case ARMII::BrMiscFrm:
414 emitMiscBranchInstruction(MI);
417 case ARMII::VFPUnaryFrm:
418 case ARMII::VFPBinaryFrm:
419 emitVFPArithInstruction(MI);
421 case ARMII::VFPConv1Frm:
422 case ARMII::VFPConv2Frm:
423 case ARMII::VFPConv3Frm:
424 case ARMII::VFPConv4Frm:
425 case ARMII::VFPConv5Frm:
426 emitVFPConversionInstruction(MI);
428 case ARMII::VFPLdStFrm:
429 emitVFPLoadStoreInstruction(MI);
431 case ARMII::VFPLdStMulFrm:
432 emitVFPLoadStoreMultipleInstruction(MI);
434 case ARMII::VFPMiscFrm:
435 emitMiscInstruction(MI);
437 // NEON instructions.
438 case ARMII::NGetLnFrm:
439 case ARMII::NSetLnFrm:
440 emitNEONLaneInstruction(MI);
443 emitNEONDupInstruction(MI);
445 case ARMII::N1RegModImmFrm:
446 emitNEON1RegModImmInstruction(MI);
448 case ARMII::N2RegFrm:
449 emitNEON2RegInstruction(MI);
451 case ARMII::N3RegFrm:
452 emitNEON3RegInstruction(MI);
455 MCE.processDebugLoc(MI.getDebugLoc(), false);
458 void ARMCodeEmitter::emitConstPoolInstruction(const MachineInstr &MI) {
459 unsigned CPI = MI.getOperand(0).getImm(); // CP instruction index.
460 unsigned CPIndex = MI.getOperand(1).getIndex(); // Actual cp entry index.
461 const MachineConstantPoolEntry &MCPE = (*MCPEs)[CPIndex];
463 // Remember the CONSTPOOL_ENTRY address for later relocation.
464 JTI->addConstantPoolEntryAddr(CPI, MCE.getCurrentPCValue());
466 // Emit constpool island entry. In most cases, the actual values will be
467 // resolved and relocated after code emission.
468 if (MCPE.isMachineConstantPoolEntry()) {
469 ARMConstantPoolValue *ACPV =
470 static_cast<ARMConstantPoolValue*>(MCPE.Val.MachineCPVal);
472 DEBUG(errs() << " ** ARM constant pool #" << CPI << " @ "
473 << (void*)MCE.getCurrentPCValue() << " " << *ACPV << '\n');
475 assert(ACPV->isGlobalValue() && "unsupported constant pool value");
476 const GlobalValue *GV = ACPV->getGV();
478 Reloc::Model RelocM = TM.getRelocationModel();
479 emitGlobalAddress(GV, ARM::reloc_arm_machine_cp_entry,
481 Subtarget->GVIsIndirectSymbol(GV, RelocM),
484 emitExternalSymbolAddress(ACPV->getSymbol(), ARM::reloc_arm_absolute);
488 const Constant *CV = MCPE.Val.ConstVal;
491 errs() << " ** Constant pool #" << CPI << " @ "
492 << (void*)MCE.getCurrentPCValue() << " ";
493 if (const Function *F = dyn_cast<Function>(CV))
494 errs() << F->getName();
500 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
501 emitGlobalAddress(GV, ARM::reloc_arm_absolute, isa<Function>(GV), false);
503 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
504 uint32_t Val = *(uint32_t*)CI->getValue().getRawData();
506 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
507 if (CFP->getType()->isFloatTy())
508 emitWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
509 else if (CFP->getType()->isDoubleTy())
510 emitDWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
512 llvm_unreachable("Unable to handle this constantpool entry!");
515 llvm_unreachable("Unable to handle this constantpool entry!");
520 void ARMCodeEmitter::emitMOVi32immInstruction(const MachineInstr &MI) {
521 const MachineOperand &MO0 = MI.getOperand(0);
522 const MachineOperand &MO1 = MI.getOperand(1);
524 // Emit the 'movw' instruction.
525 unsigned Binary = 0x30 << 20; // mov: Insts{27-20} = 0b00110000
527 unsigned Lo16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movw) & 0xFFFF;
529 // Set the conditional execution predicate.
530 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
533 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
535 // Encode imm16 as imm4:imm12
536 Binary |= Lo16 & 0xFFF; // Insts{11-0} = imm12
537 Binary |= ((Lo16 >> 12) & 0xF) << 16; // Insts{19-16} = imm4
540 unsigned Hi16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movt) >> 16;
541 // Emit the 'movt' instruction.
542 Binary = 0x34 << 20; // movt: Insts{27-20} = 0b00110100
544 // Set the conditional execution predicate.
545 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
548 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
550 // Encode imm16 as imm4:imm1, same as movw above.
551 Binary |= Hi16 & 0xFFF;
552 Binary |= ((Hi16 >> 12) & 0xF) << 16;
556 void ARMCodeEmitter::emitMOVi2piecesInstruction(const MachineInstr &MI) {
557 const MachineOperand &MO0 = MI.getOperand(0);
558 const MachineOperand &MO1 = MI.getOperand(1);
559 assert(MO1.isImm() && ARM_AM::isSOImmTwoPartVal(MO1.getImm()) &&
560 "Not a valid so_imm value!");
561 unsigned V1 = ARM_AM::getSOImmTwoPartFirst(MO1.getImm());
562 unsigned V2 = ARM_AM::getSOImmTwoPartSecond(MO1.getImm());
564 // Emit the 'mov' instruction.
565 unsigned Binary = 0xd << 21; // mov: Insts{24-21} = 0b1101
567 // Set the conditional execution predicate.
568 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
571 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
574 // Set bit I(25) to identify this is the immediate form of <shifter_op>
575 Binary |= 1 << ARMII::I_BitShift;
576 Binary |= getMachineSoImmOpValue(V1);
579 // Now the 'orr' instruction.
580 Binary = 0xc << 21; // orr: Insts{24-21} = 0b1100
582 // Set the conditional execution predicate.
583 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
586 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
589 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRnShift;
592 // Set bit I(25) to identify this is the immediate form of <shifter_op>
593 Binary |= 1 << ARMII::I_BitShift;
594 Binary |= getMachineSoImmOpValue(V2);
598 void ARMCodeEmitter::emitLEApcrelJTInstruction(const MachineInstr &MI) {
599 // It's basically add r, pc, (LJTI - $+8)
601 const TargetInstrDesc &TID = MI.getDesc();
603 // Emit the 'add' instruction.
604 unsigned Binary = 0x4 << 21; // add: Insts{24-31} = 0b0100
606 // Set the conditional execution predicate
607 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
609 // Encode S bit if MI modifies CPSR.
610 Binary |= getAddrModeSBit(MI, TID);
613 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
615 // Encode Rn which is PC.
616 Binary |= getARMRegisterNumbering(ARM::PC) << ARMII::RegRnShift;
618 // Encode the displacement.
619 Binary |= 1 << ARMII::I_BitShift;
620 emitJumpTableAddress(MI.getOperand(1).getIndex(), ARM::reloc_arm_jt_base);
625 void ARMCodeEmitter::emitPseudoMoveInstruction(const MachineInstr &MI) {
626 unsigned Opcode = MI.getDesc().Opcode;
628 // Part of binary is determined by TableGn.
629 unsigned Binary = getBinaryCodeForInstr(MI);
631 // Set the conditional execution predicate
632 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
634 // Encode S bit if MI modifies CPSR.
635 if (Opcode == ARM::MOVsrl_flag || Opcode == ARM::MOVsra_flag)
636 Binary |= 1 << ARMII::S_BitShift;
638 // Encode register def if there is one.
639 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
641 // Encode the shift operation.
648 case ARM::MOVsrl_flag:
650 Binary |= (0x2 << 4) | (1 << 7);
652 case ARM::MOVsra_flag:
654 Binary |= (0x4 << 4) | (1 << 7);
658 // Encode register Rm.
659 Binary |= getMachineOpValue(MI, 1);
664 void ARMCodeEmitter::addPCLabel(unsigned LabelID) {
665 DEBUG(errs() << " ** LPC" << LabelID << " @ "
666 << (void*)MCE.getCurrentPCValue() << '\n');
667 JTI->addPCLabelAddr(LabelID, MCE.getCurrentPCValue());
670 void ARMCodeEmitter::emitPseudoInstruction(const MachineInstr &MI) {
671 unsigned Opcode = MI.getDesc().Opcode;
674 llvm_unreachable("ARMCodeEmitter::emitPseudoInstruction");
678 case ARM::BMOVPCRXr9: {
679 // First emit mov lr, pc
680 unsigned Binary = 0x01a0e00f;
681 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
684 // and then emit the branch.
685 emitMiscBranchInstruction(MI);
688 case TargetOpcode::INLINEASM: {
689 // We allow inline assembler nodes with empty bodies - they can
690 // implicitly define registers, which is ok for JIT.
691 if (MI.getOperand(0).getSymbolName()[0]) {
692 report_fatal_error("JIT does not support inline asm!");
696 case TargetOpcode::PROLOG_LABEL:
697 case TargetOpcode::EH_LABEL:
698 MCE.emitLabel(MI.getOperand(0).getMCSymbol());
700 case TargetOpcode::IMPLICIT_DEF:
701 case TargetOpcode::KILL:
704 case ARM::CONSTPOOL_ENTRY:
705 emitConstPoolInstruction(MI);
708 // Remember of the address of the PC label for relocation later.
709 addPCLabel(MI.getOperand(2).getImm());
710 // PICADD is just an add instruction that implicitly read pc.
711 emitDataProcessingInstruction(MI, 0, ARM::PC);
718 // Remember of the address of the PC label for relocation later.
719 addPCLabel(MI.getOperand(2).getImm());
720 // These are just load / store instructions that implicitly read pc.
721 emitLoadStoreInstruction(MI, 0, ARM::PC);
728 // Remember of the address of the PC label for relocation later.
729 addPCLabel(MI.getOperand(2).getImm());
730 // These are just load / store instructions that implicitly read pc.
731 emitMiscLoadStoreInstruction(MI, ARM::PC);
736 emitMOVi32immInstruction(MI);
739 case ARM::MOVi2pieces:
740 // Two instructions to materialize a constant.
741 emitMOVi2piecesInstruction(MI);
743 case ARM::LEApcrelJT:
744 // Materialize jumptable address.
745 emitLEApcrelJTInstruction(MI);
748 case ARM::MOVsrl_flag:
749 case ARM::MOVsra_flag:
750 emitPseudoMoveInstruction(MI);
755 unsigned ARMCodeEmitter::getMachineSoRegOpValue(const MachineInstr &MI,
756 const TargetInstrDesc &TID,
757 const MachineOperand &MO,
759 unsigned Binary = getMachineOpValue(MI, MO);
761 const MachineOperand &MO1 = MI.getOperand(OpIdx + 1);
762 const MachineOperand &MO2 = MI.getOperand(OpIdx + 2);
763 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO2.getImm());
765 // Encode the shift opcode.
767 unsigned Rs = MO1.getReg();
769 // Set shift operand (bit[7:4]).
774 // RRX - 0110 and bit[11:8] clear.
776 default: llvm_unreachable("Unknown shift opc!");
777 case ARM_AM::lsl: SBits = 0x1; break;
778 case ARM_AM::lsr: SBits = 0x3; break;
779 case ARM_AM::asr: SBits = 0x5; break;
780 case ARM_AM::ror: SBits = 0x7; break;
781 case ARM_AM::rrx: SBits = 0x6; break;
784 // Set shift operand (bit[6:4]).
790 default: llvm_unreachable("Unknown shift opc!");
791 case ARM_AM::lsl: SBits = 0x0; break;
792 case ARM_AM::lsr: SBits = 0x2; break;
793 case ARM_AM::asr: SBits = 0x4; break;
794 case ARM_AM::ror: SBits = 0x6; break;
797 Binary |= SBits << 4;
798 if (SOpc == ARM_AM::rrx)
801 // Encode the shift operation Rs or shift_imm (except rrx).
803 // Encode Rs bit[11:8].
804 assert(ARM_AM::getSORegOffset(MO2.getImm()) == 0);
805 return Binary | (getARMRegisterNumbering(Rs) << ARMII::RegRsShift);
808 // Encode shift_imm bit[11:7].
809 return Binary | ARM_AM::getSORegOffset(MO2.getImm()) << 7;
812 unsigned ARMCodeEmitter::getMachineSoImmOpValue(unsigned SoImm) {
813 int SoImmVal = ARM_AM::getSOImmVal(SoImm);
814 assert(SoImmVal != -1 && "Not a valid so_imm value!");
816 // Encode rotate_imm.
817 unsigned Binary = (ARM_AM::getSOImmValRot((unsigned)SoImmVal) >> 1)
818 << ARMII::SoRotImmShift;
821 Binary |= ARM_AM::getSOImmValImm((unsigned)SoImmVal);
825 unsigned ARMCodeEmitter::getAddrModeSBit(const MachineInstr &MI,
826 const TargetInstrDesc &TID) const {
827 for (unsigned i = MI.getNumOperands(), e = TID.getNumOperands(); i != e; --i){
828 const MachineOperand &MO = MI.getOperand(i-1);
829 if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR)
830 return 1 << ARMII::S_BitShift;
835 void ARMCodeEmitter::emitDataProcessingInstruction(const MachineInstr &MI,
837 unsigned ImplicitRn) {
838 const TargetInstrDesc &TID = MI.getDesc();
840 // Part of binary is determined by TableGn.
841 unsigned Binary = getBinaryCodeForInstr(MI);
843 // Set the conditional execution predicate
844 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
846 // Encode S bit if MI modifies CPSR.
847 Binary |= getAddrModeSBit(MI, TID);
849 // Encode register def if there is one.
850 unsigned NumDefs = TID.getNumDefs();
853 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
855 // Special handling for implicit use (e.g. PC).
856 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
858 if (TID.Opcode == ARM::MOVi16) {
859 // Get immediate from MI.
860 unsigned Lo16 = getMovi32Value(MI, MI.getOperand(OpIdx),
861 ARM::reloc_arm_movw);
862 // Encode imm which is the same as in emitMOVi32immInstruction().
863 Binary |= Lo16 & 0xFFF;
864 Binary |= ((Lo16 >> 12) & 0xF) << 16;
867 } else if(TID.Opcode == ARM::MOVTi16) {
868 unsigned Hi16 = (getMovi32Value(MI, MI.getOperand(OpIdx),
869 ARM::reloc_arm_movt) >> 16);
870 Binary |= Hi16 & 0xFFF;
871 Binary |= ((Hi16 >> 12) & 0xF) << 16;
874 } else if ((TID.Opcode == ARM::BFC) || (TID.Opcode == ARM::BFI)) {
875 uint32_t v = ~MI.getOperand(2).getImm();
876 int32_t lsb = CountTrailingZeros_32(v);
877 int32_t msb = (32 - CountLeadingZeros_32(v)) - 1;
878 // Instr{20-16} = msb, Instr{11-7} = lsb
879 Binary |= (msb & 0x1F) << 16;
880 Binary |= (lsb & 0x1F) << 7;
883 } else if ((TID.Opcode == ARM::UBFX) || (TID.Opcode == ARM::SBFX)) {
884 // Encode Rn in Instr{0-3}
885 Binary |= getMachineOpValue(MI, OpIdx++);
887 uint32_t lsb = MI.getOperand(OpIdx++).getImm();
888 uint32_t widthm1 = MI.getOperand(OpIdx++).getImm() - 1;
890 // Instr{20-16} = widthm1, Instr{11-7} = lsb
891 Binary |= (widthm1 & 0x1F) << 16;
892 Binary |= (lsb & 0x1F) << 7;
897 // If this is a two-address operand, skip it. e.g. MOVCCr operand 1.
898 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
901 // Encode first non-shifter register operand if there is one.
902 bool isUnary = TID.TSFlags & ARMII::UnaryDP;
905 // Special handling for implicit use (e.g. PC).
906 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
908 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRnShift;
913 // Encode shifter operand.
914 const MachineOperand &MO = MI.getOperand(OpIdx);
915 if ((TID.TSFlags & ARMII::FormMask) == ARMII::DPSoRegFrm) {
917 emitWordLE(Binary | getMachineSoRegOpValue(MI, TID, MO, OpIdx));
922 // Encode register Rm.
923 emitWordLE(Binary | getARMRegisterNumbering(MO.getReg()));
928 Binary |= getMachineSoImmOpValue((unsigned)MO.getImm());
933 void ARMCodeEmitter::emitLoadStoreInstruction(const MachineInstr &MI,
935 unsigned ImplicitRn) {
936 const TargetInstrDesc &TID = MI.getDesc();
937 unsigned Form = TID.TSFlags & ARMII::FormMask;
938 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
940 // Part of binary is determined by TableGn.
941 unsigned Binary = getBinaryCodeForInstr(MI);
943 // Set the conditional execution predicate
944 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
948 // Operand 0 of a pre- and post-indexed store is the address base
949 // writeback. Skip it.
950 bool Skipped = false;
951 if (IsPrePost && Form == ARMII::StFrm) {
958 // Special handling for implicit use (e.g. PC).
959 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
961 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
963 // Set second operand
965 // Special handling for implicit use (e.g. PC).
966 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
968 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
970 // If this is a two-address operand, skip it. e.g. LDR_PRE.
971 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
974 const MachineOperand &MO2 = MI.getOperand(OpIdx);
975 unsigned AM2Opc = (ImplicitRn == ARM::PC)
976 ? 0 : MI.getOperand(OpIdx+1).getImm();
978 // Set bit U(23) according to sign of immed value (positive or negative).
979 Binary |= ((ARM_AM::getAM2Op(AM2Opc) == ARM_AM::add ? 1 : 0) <<
981 if (!MO2.getReg()) { // is immediate
982 if (ARM_AM::getAM2Offset(AM2Opc))
983 // Set the value of offset_12 field
984 Binary |= ARM_AM::getAM2Offset(AM2Opc);
989 // Set bit I(25), because this is not in immediate enconding.
990 Binary |= 1 << ARMII::I_BitShift;
991 assert(TargetRegisterInfo::isPhysicalRegister(MO2.getReg()));
992 // Set bit[3:0] to the corresponding Rm register
993 Binary |= getARMRegisterNumbering(MO2.getReg());
995 // If this instr is in scaled register offset/index instruction, set
996 // shift_immed(bit[11:7]) and shift(bit[6:5]) fields.
997 if (unsigned ShImm = ARM_AM::getAM2Offset(AM2Opc)) {
998 Binary |= getShiftOp(AM2Opc) << ARMII::ShiftImmShift; // shift
999 Binary |= ShImm << ARMII::ShiftShift; // shift_immed
1005 void ARMCodeEmitter::emitMiscLoadStoreInstruction(const MachineInstr &MI,
1006 unsigned ImplicitRn) {
1007 const TargetInstrDesc &TID = MI.getDesc();
1008 unsigned Form = TID.TSFlags & ARMII::FormMask;
1009 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1011 // Part of binary is determined by TableGn.
1012 unsigned Binary = getBinaryCodeForInstr(MI);
1014 // Set the conditional execution predicate
1015 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1019 // Operand 0 of a pre- and post-indexed store is the address base
1020 // writeback. Skip it.
1021 bool Skipped = false;
1022 if (IsPrePost && Form == ARMII::StMiscFrm) {
1027 // Set first operand
1028 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1030 // Skip LDRD and STRD's second operand.
1031 if (TID.Opcode == ARM::LDRD || TID.Opcode == ARM::STRD)
1034 // Set second operand
1036 // Special handling for implicit use (e.g. PC).
1037 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1039 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1041 // If this is a two-address operand, skip it. e.g. LDRH_POST.
1042 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1045 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1046 unsigned AM3Opc = (ImplicitRn == ARM::PC)
1047 ? 0 : MI.getOperand(OpIdx+1).getImm();
1049 // Set bit U(23) according to sign of immed value (positive or negative)
1050 Binary |= ((ARM_AM::getAM3Op(AM3Opc) == ARM_AM::add ? 1 : 0) <<
1053 // If this instr is in register offset/index encoding, set bit[3:0]
1054 // to the corresponding Rm register.
1056 Binary |= getARMRegisterNumbering(MO2.getReg());
1061 // This instr is in immediate offset/index encoding, set bit 22 to 1.
1062 Binary |= 1 << ARMII::AM3_I_BitShift;
1063 if (unsigned ImmOffs = ARM_AM::getAM3Offset(AM3Opc)) {
1065 Binary |= (ImmOffs >> 4) << ARMII::ImmHiShift; // immedH
1066 Binary |= (ImmOffs & 0xF); // immedL
1072 static unsigned getAddrModeUPBits(unsigned Mode) {
1073 unsigned Binary = 0;
1075 // Set addressing mode by modifying bits U(23) and P(24)
1076 // IA - Increment after - bit U = 1 and bit P = 0
1077 // IB - Increment before - bit U = 1 and bit P = 1
1078 // DA - Decrement after - bit U = 0 and bit P = 0
1079 // DB - Decrement before - bit U = 0 and bit P = 1
1081 default: llvm_unreachable("Unknown addressing sub-mode!");
1082 case ARM_AM::da: break;
1083 case ARM_AM::db: Binary |= 0x1 << ARMII::P_BitShift; break;
1084 case ARM_AM::ia: Binary |= 0x1 << ARMII::U_BitShift; break;
1085 case ARM_AM::ib: Binary |= 0x3 << ARMII::U_BitShift; break;
1091 void ARMCodeEmitter::emitLoadStoreMultipleInstruction(const MachineInstr &MI) {
1092 const TargetInstrDesc &TID = MI.getDesc();
1093 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1095 // Part of binary is determined by TableGn.
1096 unsigned Binary = getBinaryCodeForInstr(MI);
1098 // Set the conditional execution predicate
1099 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1101 // Skip operand 0 of an instruction with base register update.
1106 // Set base address operand
1107 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1109 // Set addressing mode by modifying bits U(23) and P(24)
1110 const MachineOperand &MO = MI.getOperand(OpIdx++);
1111 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(MO.getImm()));
1115 Binary |= 0x1 << ARMII::W_BitShift;
1118 for (unsigned i = OpIdx+2, e = MI.getNumOperands(); i != e; ++i) {
1119 const MachineOperand &MO = MI.getOperand(i);
1120 if (!MO.isReg() || MO.isImplicit())
1122 unsigned RegNum = getARMRegisterNumbering(MO.getReg());
1123 assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
1125 Binary |= 0x1 << RegNum;
1131 void ARMCodeEmitter::emitMulFrmInstruction(const MachineInstr &MI) {
1132 const TargetInstrDesc &TID = MI.getDesc();
1134 // Part of binary is determined by TableGn.
1135 unsigned Binary = getBinaryCodeForInstr(MI);
1137 // Set the conditional execution predicate
1138 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1140 // Encode S bit if MI modifies CPSR.
1141 Binary |= getAddrModeSBit(MI, TID);
1143 // 32x32->64bit operations have two destination registers. The number
1144 // of register definitions will tell us if that's what we're dealing with.
1146 if (TID.getNumDefs() == 2)
1147 Binary |= getMachineOpValue (MI, OpIdx++) << ARMII::RegRdLoShift;
1150 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdHiShift;
1153 Binary |= getMachineOpValue(MI, OpIdx++);
1156 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRsShift;
1158 // Many multiple instructions (e.g. MLA) have three src operands. Encode
1159 // it as Rn (for multiply, that's in the same offset as RdLo.
1160 if (TID.getNumOperands() > OpIdx &&
1161 !TID.OpInfo[OpIdx].isPredicate() &&
1162 !TID.OpInfo[OpIdx].isOptionalDef())
1163 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRdLoShift;
1168 void ARMCodeEmitter::emitExtendInstruction(const MachineInstr &MI) {
1169 const TargetInstrDesc &TID = MI.getDesc();
1171 // Part of binary is determined by TableGn.
1172 unsigned Binary = getBinaryCodeForInstr(MI);
1174 // Set the conditional execution predicate
1175 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1180 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1182 const MachineOperand &MO1 = MI.getOperand(OpIdx++);
1183 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1185 // Two register operand form.
1187 Binary |= getMachineOpValue(MI, MO1) << ARMII::RegRnShift;
1190 Binary |= getMachineOpValue(MI, MO2);
1193 Binary |= getMachineOpValue(MI, MO1);
1196 // Encode rot imm (0, 8, 16, or 24) if it has a rotate immediate operand.
1197 if (MI.getOperand(OpIdx).isImm() &&
1198 !TID.OpInfo[OpIdx].isPredicate() &&
1199 !TID.OpInfo[OpIdx].isOptionalDef())
1200 Binary |= (getMachineOpValue(MI, OpIdx) / 8) << ARMII::ExtRotImmShift;
1205 void ARMCodeEmitter::emitMiscArithInstruction(const MachineInstr &MI) {
1206 const TargetInstrDesc &TID = MI.getDesc();
1208 // Part of binary is determined by TableGn.
1209 unsigned Binary = getBinaryCodeForInstr(MI);
1211 // Set the conditional execution predicate
1212 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1217 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1219 const MachineOperand &MO = MI.getOperand(OpIdx++);
1220 if (OpIdx == TID.getNumOperands() ||
1221 TID.OpInfo[OpIdx].isPredicate() ||
1222 TID.OpInfo[OpIdx].isOptionalDef()) {
1223 // Encode Rm and it's done.
1224 Binary |= getMachineOpValue(MI, MO);
1230 Binary |= getMachineOpValue(MI, MO) << ARMII::RegRnShift;
1233 Binary |= getMachineOpValue(MI, OpIdx++);
1235 // Encode shift_imm.
1236 unsigned ShiftAmt = MI.getOperand(OpIdx).getImm();
1237 if (TID.Opcode == ARM::PKHTB) {
1238 assert(ShiftAmt != 0 && "PKHTB shift_imm is 0!");
1242 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1243 Binary |= ShiftAmt << ARMII::ShiftShift;
1248 void ARMCodeEmitter::emitSaturateInstruction(const MachineInstr &MI) {
1249 const TargetInstrDesc &TID = MI.getDesc();
1251 // Part of binary is determined by TableGen.
1252 unsigned Binary = getBinaryCodeForInstr(MI);
1254 // Set the conditional execution predicate
1255 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1258 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
1260 // Encode saturate bit position.
1261 unsigned Pos = MI.getOperand(1).getImm();
1262 if (TID.Opcode == ARM::SSAT || TID.Opcode == ARM::SSAT16)
1264 assert((Pos < 16 || (Pos < 32 &&
1265 TID.Opcode != ARM::SSAT16 &&
1266 TID.Opcode != ARM::USAT16)) &&
1267 "saturate bit position out of range");
1268 Binary |= Pos << 16;
1271 Binary |= getMachineOpValue(MI, 2);
1273 // Encode shift_imm.
1274 if (TID.getNumOperands() == 4) {
1275 unsigned ShiftOp = MI.getOperand(3).getImm();
1276 ARM_AM::ShiftOpc Opc = ARM_AM::getSORegShOp(ShiftOp);
1277 if (Opc == ARM_AM::asr)
1279 unsigned ShiftAmt = MI.getOperand(3).getImm();
1280 if (ShiftAmt == 32 && Opc == ARM_AM::asr)
1282 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1283 Binary |= ShiftAmt << ARMII::ShiftShift;
1289 void ARMCodeEmitter::emitBranchInstruction(const MachineInstr &MI) {
1290 const TargetInstrDesc &TID = MI.getDesc();
1292 if (TID.Opcode == ARM::TPsoft) {
1293 llvm_unreachable("ARM::TPsoft FIXME"); // FIXME
1296 // Part of binary is determined by TableGn.
1297 unsigned Binary = getBinaryCodeForInstr(MI);
1299 // Set the conditional execution predicate
1300 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1302 // Set signed_immed_24 field
1303 Binary |= getMachineOpValue(MI, 0);
1308 void ARMCodeEmitter::emitInlineJumpTable(unsigned JTIndex) {
1309 // Remember the base address of the inline jump table.
1310 uintptr_t JTBase = MCE.getCurrentPCValue();
1311 JTI->addJumpTableBaseAddr(JTIndex, JTBase);
1312 DEBUG(errs() << " ** Jump Table #" << JTIndex << " @ " << (void*)JTBase
1315 // Now emit the jump table entries.
1316 const std::vector<MachineBasicBlock*> &MBBs = (*MJTEs)[JTIndex].MBBs;
1317 for (unsigned i = 0, e = MBBs.size(); i != e; ++i) {
1319 // DestBB address - JT base.
1320 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_pic_jt, JTBase);
1322 // Absolute DestBB address.
1323 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_absolute);
1328 void ARMCodeEmitter::emitMiscBranchInstruction(const MachineInstr &MI) {
1329 const TargetInstrDesc &TID = MI.getDesc();
1331 // Handle jump tables.
1332 if (TID.Opcode == ARM::BR_JTr || TID.Opcode == ARM::BR_JTadd) {
1333 // First emit a ldr pc, [] instruction.
1334 emitDataProcessingInstruction(MI, ARM::PC);
1336 // Then emit the inline jump table.
1338 (TID.Opcode == ARM::BR_JTr)
1339 ? MI.getOperand(1).getIndex() : MI.getOperand(2).getIndex();
1340 emitInlineJumpTable(JTIndex);
1342 } else if (TID.Opcode == ARM::BR_JTm) {
1343 // First emit a ldr pc, [] instruction.
1344 emitLoadStoreInstruction(MI, ARM::PC);
1346 // Then emit the inline jump table.
1347 emitInlineJumpTable(MI.getOperand(3).getIndex());
1351 // Part of binary is determined by TableGn.
1352 unsigned Binary = getBinaryCodeForInstr(MI);
1354 // Set the conditional execution predicate
1355 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1357 if (TID.Opcode == ARM::BX_RET || TID.Opcode == ARM::MOVPCLR)
1358 // The return register is LR.
1359 Binary |= getARMRegisterNumbering(ARM::LR);
1361 // otherwise, set the return register
1362 Binary |= getMachineOpValue(MI, 0);
1367 static unsigned encodeVFPRd(const MachineInstr &MI, unsigned OpIdx) {
1368 unsigned RegD = MI.getOperand(OpIdx).getReg();
1369 unsigned Binary = 0;
1370 bool isSPVFP = ARM::SPRRegisterClass->contains(RegD);
1371 RegD = getARMRegisterNumbering(RegD);
1373 Binary |= RegD << ARMII::RegRdShift;
1375 Binary |= ((RegD & 0x1E) >> 1) << ARMII::RegRdShift;
1376 Binary |= (RegD & 0x01) << ARMII::D_BitShift;
1381 static unsigned encodeVFPRn(const MachineInstr &MI, unsigned OpIdx) {
1382 unsigned RegN = MI.getOperand(OpIdx).getReg();
1383 unsigned Binary = 0;
1384 bool isSPVFP = ARM::SPRRegisterClass->contains(RegN);
1385 RegN = getARMRegisterNumbering(RegN);
1387 Binary |= RegN << ARMII::RegRnShift;
1389 Binary |= ((RegN & 0x1E) >> 1) << ARMII::RegRnShift;
1390 Binary |= (RegN & 0x01) << ARMII::N_BitShift;
1395 static unsigned encodeVFPRm(const MachineInstr &MI, unsigned OpIdx) {
1396 unsigned RegM = MI.getOperand(OpIdx).getReg();
1397 unsigned Binary = 0;
1398 bool isSPVFP = ARM::SPRRegisterClass->contains(RegM);
1399 RegM = getARMRegisterNumbering(RegM);
1403 Binary |= ((RegM & 0x1E) >> 1);
1404 Binary |= (RegM & 0x01) << ARMII::M_BitShift;
1409 void ARMCodeEmitter::emitVFPArithInstruction(const MachineInstr &MI) {
1410 const TargetInstrDesc &TID = MI.getDesc();
1412 // Part of binary is determined by TableGn.
1413 unsigned Binary = getBinaryCodeForInstr(MI);
1415 // Set the conditional execution predicate
1416 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1419 assert((Binary & ARMII::D_BitShift) == 0 &&
1420 (Binary & ARMII::N_BitShift) == 0 &&
1421 (Binary & ARMII::M_BitShift) == 0 && "VFP encoding bug!");
1424 Binary |= encodeVFPRd(MI, OpIdx++);
1426 // If this is a two-address operand, skip it, e.g. FMACD.
1427 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1431 if ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPBinaryFrm)
1432 Binary |= encodeVFPRn(MI, OpIdx++);
1434 if (OpIdx == TID.getNumOperands() ||
1435 TID.OpInfo[OpIdx].isPredicate() ||
1436 TID.OpInfo[OpIdx].isOptionalDef()) {
1437 // FCMPEZD etc. has only one operand.
1443 Binary |= encodeVFPRm(MI, OpIdx);
1448 void ARMCodeEmitter::emitVFPConversionInstruction(const MachineInstr &MI) {
1449 const TargetInstrDesc &TID = MI.getDesc();
1450 unsigned Form = TID.TSFlags & ARMII::FormMask;
1452 // Part of binary is determined by TableGn.
1453 unsigned Binary = getBinaryCodeForInstr(MI);
1455 // Set the conditional execution predicate
1456 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1460 case ARMII::VFPConv1Frm:
1461 case ARMII::VFPConv2Frm:
1462 case ARMII::VFPConv3Frm:
1464 Binary |= encodeVFPRd(MI, 0);
1466 case ARMII::VFPConv4Frm:
1468 Binary |= encodeVFPRn(MI, 0);
1470 case ARMII::VFPConv5Frm:
1472 Binary |= encodeVFPRm(MI, 0);
1478 case ARMII::VFPConv1Frm:
1480 Binary |= encodeVFPRm(MI, 1);
1482 case ARMII::VFPConv2Frm:
1483 case ARMII::VFPConv3Frm:
1485 Binary |= encodeVFPRn(MI, 1);
1487 case ARMII::VFPConv4Frm:
1488 case ARMII::VFPConv5Frm:
1490 Binary |= encodeVFPRd(MI, 1);
1494 if (Form == ARMII::VFPConv5Frm)
1496 Binary |= encodeVFPRn(MI, 2);
1497 else if (Form == ARMII::VFPConv3Frm)
1499 Binary |= encodeVFPRm(MI, 2);
1504 void ARMCodeEmitter::emitVFPLoadStoreInstruction(const MachineInstr &MI) {
1505 // Part of binary is determined by TableGn.
1506 unsigned Binary = getBinaryCodeForInstr(MI);
1508 // Set the conditional execution predicate
1509 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1514 Binary |= encodeVFPRd(MI, OpIdx++);
1516 // Encode address base.
1517 const MachineOperand &Base = MI.getOperand(OpIdx++);
1518 Binary |= getMachineOpValue(MI, Base) << ARMII::RegRnShift;
1520 // If there is a non-zero immediate offset, encode it.
1522 const MachineOperand &Offset = MI.getOperand(OpIdx);
1523 if (unsigned ImmOffs = ARM_AM::getAM5Offset(Offset.getImm())) {
1524 if (ARM_AM::getAM5Op(Offset.getImm()) == ARM_AM::add)
1525 Binary |= 1 << ARMII::U_BitShift;
1532 // If immediate offset is omitted, default to +0.
1533 Binary |= 1 << ARMII::U_BitShift;
1539 ARMCodeEmitter::emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI) {
1540 const TargetInstrDesc &TID = MI.getDesc();
1541 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1543 // Part of binary is determined by TableGn.
1544 unsigned Binary = getBinaryCodeForInstr(MI);
1546 // Set the conditional execution predicate
1547 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1549 // Skip operand 0 of an instruction with base register update.
1554 // Set base address operand
1555 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1557 // Set addressing mode by modifying bits U(23) and P(24)
1558 const MachineOperand &MO = MI.getOperand(OpIdx++);
1559 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(MO.getImm()));
1563 Binary |= 0x1 << ARMII::W_BitShift;
1565 // First register is encoded in Dd.
1566 Binary |= encodeVFPRd(MI, OpIdx+2);
1568 // Count the number of registers.
1569 unsigned NumRegs = 1;
1570 for (unsigned i = OpIdx+3, e = MI.getNumOperands(); i != e; ++i) {
1571 const MachineOperand &MO = MI.getOperand(i);
1572 if (!MO.isReg() || MO.isImplicit())
1576 // Bit 8 will be set if <list> is consecutive 64-bit registers (e.g., D0)
1577 // Otherwise, it will be 0, in the case of 32-bit registers.
1579 Binary |= NumRegs * 2;
1586 void ARMCodeEmitter::emitMiscInstruction(const MachineInstr &MI) {
1587 unsigned Opcode = MI.getDesc().Opcode;
1588 // Part of binary is determined by TableGn.
1589 unsigned Binary = getBinaryCodeForInstr(MI);
1591 // Set the conditional execution predicate
1592 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1596 llvm_unreachable("ARMCodeEmitter::emitMiscInstruction");
1599 // No further encoding needed.
1604 const MachineOperand &MO0 = MI.getOperand(0);
1606 Binary |= getARMRegisterNumbering(MO0.getReg()) << ARMII::RegRdShift;
1611 case ARM::FCONSTS: {
1613 Binary |= encodeVFPRd(MI, 0);
1615 // Encode imm., Table A7-18 VFP modified immediate constants
1616 const MachineOperand &MO1 = MI.getOperand(1);
1617 unsigned Imm = static_cast<unsigned>(MO1.getFPImm()->getValueAPF()
1618 .bitcastToAPInt().getHiBits(32).getLimitedValue());
1619 unsigned ModifiedImm;
1621 if(Opcode == ARM::FCONSTS)
1622 ModifiedImm = (Imm & 0x80000000) >> 24 | // a
1623 (Imm & 0x03F80000) >> 19; // bcdefgh
1624 else // Opcode == ARM::FCONSTD
1625 ModifiedImm = (Imm & 0x80000000) >> 24 | // a
1626 (Imm & 0x007F0000) >> 16; // bcdefgh
1628 // Insts{19-16} = abcd, Insts{3-0} = efgh
1629 Binary |= ((ModifiedImm & 0xF0) >> 4) << 16;
1630 Binary |= (ModifiedImm & 0xF);
1638 static unsigned encodeNEONRd(const MachineInstr &MI, unsigned OpIdx) {
1639 unsigned RegD = MI.getOperand(OpIdx).getReg();
1640 unsigned Binary = 0;
1641 RegD = getARMRegisterNumbering(RegD);
1642 Binary |= (RegD & 0xf) << ARMII::RegRdShift;
1643 Binary |= ((RegD >> 4) & 1) << ARMII::D_BitShift;
1647 static unsigned encodeNEONRn(const MachineInstr &MI, unsigned OpIdx) {
1648 unsigned RegN = MI.getOperand(OpIdx).getReg();
1649 unsigned Binary = 0;
1650 RegN = getARMRegisterNumbering(RegN);
1651 Binary |= (RegN & 0xf) << ARMII::RegRnShift;
1652 Binary |= ((RegN >> 4) & 1) << ARMII::N_BitShift;
1656 static unsigned encodeNEONRm(const MachineInstr &MI, unsigned OpIdx) {
1657 unsigned RegM = MI.getOperand(OpIdx).getReg();
1658 unsigned Binary = 0;
1659 RegM = getARMRegisterNumbering(RegM);
1660 Binary |= (RegM & 0xf);
1661 Binary |= ((RegM >> 4) & 1) << ARMII::M_BitShift;
1665 /// convertNEONDataProcToThumb - Convert the ARM mode encoding for a NEON
1666 /// data-processing instruction to the corresponding Thumb encoding.
1667 static unsigned convertNEONDataProcToThumb(unsigned Binary) {
1668 assert((Binary & 0xfe000000) == 0xf2000000 &&
1669 "not an ARM NEON data-processing instruction");
1670 unsigned UBit = (Binary >> 24) & 1;
1671 return 0xef000000 | (UBit << 28) | (Binary & 0xffffff);
1674 void ARMCodeEmitter::emitNEONLaneInstruction(const MachineInstr &MI) {
1675 unsigned Binary = getBinaryCodeForInstr(MI);
1677 unsigned RegTOpIdx, RegNOpIdx, LnOpIdx;
1678 const TargetInstrDesc &TID = MI.getDesc();
1679 if ((TID.TSFlags & ARMII::FormMask) == ARMII::NGetLnFrm) {
1683 } else { // ARMII::NSetLnFrm
1689 // Set the conditional execution predicate
1690 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1692 unsigned RegT = MI.getOperand(RegTOpIdx).getReg();
1693 RegT = getARMRegisterNumbering(RegT);
1694 Binary |= (RegT << ARMII::RegRdShift);
1695 Binary |= encodeNEONRn(MI, RegNOpIdx);
1698 if ((Binary & (1 << 22)) != 0)
1699 LaneShift = 0; // 8-bit elements
1700 else if ((Binary & (1 << 5)) != 0)
1701 LaneShift = 1; // 16-bit elements
1703 LaneShift = 2; // 32-bit elements
1705 unsigned Lane = MI.getOperand(LnOpIdx).getImm() << LaneShift;
1706 unsigned Opc1 = Lane >> 2;
1707 unsigned Opc2 = Lane & 3;
1708 assert((Opc1 & 3) == 0 && "out-of-range lane number operand");
1709 Binary |= (Opc1 << 21);
1710 Binary |= (Opc2 << 5);
1715 void ARMCodeEmitter::emitNEONDupInstruction(const MachineInstr &MI) {
1716 unsigned Binary = getBinaryCodeForInstr(MI);
1718 // Set the conditional execution predicate
1719 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1721 unsigned RegT = MI.getOperand(1).getReg();
1722 RegT = getARMRegisterNumbering(RegT);
1723 Binary |= (RegT << ARMII::RegRdShift);
1724 Binary |= encodeNEONRn(MI, 0);
1728 void ARMCodeEmitter::emitNEON1RegModImmInstruction(const MachineInstr &MI) {
1729 unsigned Binary = getBinaryCodeForInstr(MI);
1730 // Destination register is encoded in Dd.
1731 Binary |= encodeNEONRd(MI, 0);
1732 // Immediate fields: Op, Cmode, I, Imm3, Imm4
1733 unsigned Imm = MI.getOperand(1).getImm();
1734 unsigned Op = (Imm >> 12) & 1;
1735 unsigned Cmode = (Imm >> 8) & 0xf;
1736 unsigned I = (Imm >> 7) & 1;
1737 unsigned Imm3 = (Imm >> 4) & 0x7;
1738 unsigned Imm4 = Imm & 0xf;
1739 Binary |= (I << 24) | (Imm3 << 16) | (Cmode << 8) | (Op << 5) | Imm4;
1741 Binary = convertNEONDataProcToThumb(Binary);
1745 void ARMCodeEmitter::emitNEON2RegInstruction(const MachineInstr &MI) {
1746 const TargetInstrDesc &TID = MI.getDesc();
1747 unsigned Binary = getBinaryCodeForInstr(MI);
1748 // Destination register is encoded in Dd; source register in Dm.
1750 Binary |= encodeNEONRd(MI, OpIdx++);
1751 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1753 Binary |= encodeNEONRm(MI, OpIdx);
1755 Binary = convertNEONDataProcToThumb(Binary);
1756 // FIXME: This does not handle VDUPfdf or VDUPfqf.
1760 void ARMCodeEmitter::emitNEON3RegInstruction(const MachineInstr &MI) {
1761 const TargetInstrDesc &TID = MI.getDesc();
1762 unsigned Binary = getBinaryCodeForInstr(MI);
1763 // Destination register is encoded in Dd; source registers in Dn and Dm.
1765 Binary |= encodeNEONRd(MI, OpIdx++);
1766 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1768 Binary |= encodeNEONRn(MI, OpIdx++);
1769 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1771 Binary |= encodeNEONRm(MI, OpIdx);
1773 Binary = convertNEONDataProcToThumb(Binary);
1774 // FIXME: This does not handle VMOVDneon or VMOVQ.
1778 #include "ARMGenCodeEmitter.inc"