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);
104 unsigned getAddrModeSBit(const MachineInstr &MI,
105 const TargetInstrDesc &TID) const;
107 void emitDataProcessingInstruction(const MachineInstr &MI,
108 unsigned ImplicitRd = 0,
109 unsigned ImplicitRn = 0);
111 void emitLoadStoreInstruction(const MachineInstr &MI,
112 unsigned ImplicitRd = 0,
113 unsigned ImplicitRn = 0);
115 void emitMiscLoadStoreInstruction(const MachineInstr &MI,
116 unsigned ImplicitRn = 0);
118 void emitLoadStoreMultipleInstruction(const MachineInstr &MI);
120 void emitMulFrmInstruction(const MachineInstr &MI);
122 void emitExtendInstruction(const MachineInstr &MI);
124 void emitMiscArithInstruction(const MachineInstr &MI);
126 void emitSaturateInstruction(const MachineInstr &MI);
128 void emitBranchInstruction(const MachineInstr &MI);
130 void emitInlineJumpTable(unsigned JTIndex);
132 void emitMiscBranchInstruction(const MachineInstr &MI);
134 void emitVFPArithInstruction(const MachineInstr &MI);
136 void emitVFPConversionInstruction(const MachineInstr &MI);
138 void emitVFPLoadStoreInstruction(const MachineInstr &MI);
140 void emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI);
142 void emitNEONLaneInstruction(const MachineInstr &MI);
143 void emitNEONDupInstruction(const MachineInstr &MI);
144 void emitNEON1RegModImmInstruction(const MachineInstr &MI);
145 void emitNEON2RegInstruction(const MachineInstr &MI);
146 void emitNEON3RegInstruction(const MachineInstr &MI);
148 /// getMachineOpValue - Return binary encoding of operand. If the machine
149 /// operand requires relocation, record the relocation and return zero.
150 unsigned getMachineOpValue(const MachineInstr &MI,
151 const MachineOperand &MO) const;
152 unsigned getMachineOpValue(const MachineInstr &MI, unsigned OpIdx) const {
153 return getMachineOpValue(MI, MI.getOperand(OpIdx));
156 // FIXME: The legacy JIT ARMCodeEmitter doesn't rely on the the
157 // TableGen'erated getBinaryCodeForInstr() function to encode any
158 // operand values, instead querying getMachineOpValue() directly for
159 // each operand it needs to encode. Thus, any of the new encoder
160 // helper functions can simply return 0 as the values the return
161 // are already handled elsewhere. They are placeholders to allow this
162 // encoder to continue to function until the MC encoder is sufficiently
163 // far along that this one can be eliminated entirely.
164 unsigned NEONThumb2DataIPostEncoder(const MachineInstr &MI, unsigned Val)
166 unsigned NEONThumb2LoadStorePostEncoder(const MachineInstr &MI,unsigned Val)
168 unsigned NEONThumb2DupPostEncoder(const MachineInstr &MI,unsigned Val)
170 unsigned VFPThumb2PostEncoder(const MachineInstr&MI, unsigned Val)
172 unsigned getAdrLabelOpValue(const MachineInstr &MI, unsigned Op)
174 unsigned getBranchTargetOpValue(const MachineInstr &MI, unsigned Op)
176 unsigned getCCOutOpValue(const MachineInstr &MI, unsigned Op)
178 unsigned getSOImmOpValue(const MachineInstr &MI, unsigned Op)
180 unsigned getT2SOImmOpValue(const MachineInstr &MI, unsigned Op)
182 unsigned getSORegOpValue(const MachineInstr &MI, unsigned Op)
184 unsigned getT2AddrModeImm12OpValue(const MachineInstr &MI, unsigned Op)
186 unsigned getT2AddrModeImm8OpValue(const MachineInstr &MI, unsigned Op)
188 unsigned getT2AddrModeImm8s4OpValue(const MachineInstr &MI, unsigned Op)
190 unsigned getT2AddrModeImm8OffsetOpValue(const MachineInstr &MI, unsigned Op)
192 unsigned getT2AddrModeImm12OffsetOpValue(const MachineInstr &MI,unsigned Op)
194 unsigned getT2AddrModeSORegOpValue(const MachineInstr &MI, unsigned Op)
196 unsigned getT2SORegOpValue(const MachineInstr &MI, unsigned Op)
198 unsigned getRotImmOpValue(const MachineInstr &MI, unsigned Op)
200 unsigned getImmMinusOneOpValue(const MachineInstr &MI, unsigned Op)
202 unsigned getAddrMode6AddressOpValue(const MachineInstr &MI, unsigned Op)
204 unsigned getAddrMode6DupAddressOpValue(const MachineInstr &MI, unsigned Op)
206 unsigned getAddrMode6OffsetOpValue(const MachineInstr &MI, unsigned Op)
208 unsigned getBitfieldInvertedMaskOpValue(const MachineInstr &MI,
209 unsigned Op) const { return 0; }
210 uint32_t getLdStmModeOpValue(const MachineInstr &MI, unsigned OpIdx)
212 uint32_t getLdStSORegOpValue(const MachineInstr &MI, unsigned OpIdx)
215 unsigned getAddrModeImm12OpValue(const MachineInstr &MI, unsigned Op)
218 // {12} = (U)nsigned (add == '1', sub == '0')
220 const MachineOperand &MO = MI.getOperand(Op);
221 const MachineOperand &MO1 = MI.getOperand(Op + 1);
223 emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry);
226 unsigned Reg = getARMRegisterNumbering(MO.getReg());
227 int32_t Imm12 = MO1.getImm();
229 Binary = Imm12 & 0xfff;
232 Binary |= (Reg << 13);
236 unsigned getMovtImmOpValue(const MachineInstr &MI, unsigned Op) const {
240 uint32_t getAddrMode2OpValue(const MachineInstr &MI, unsigned OpIdx)
242 uint32_t getAddrMode2OffsetOpValue(const MachineInstr &MI, unsigned OpIdx)
244 uint32_t getAddrMode3OffsetOpValue(const MachineInstr &MI, unsigned OpIdx)
246 uint32_t getAddrMode3OpValue(const MachineInstr &MI, unsigned Op)
248 uint32_t getAddrModeS4OpValue(const MachineInstr &MI, unsigned Op)
250 uint32_t getAddrModeS2OpValue(const MachineInstr &MI, unsigned Op)
252 uint32_t getAddrModeS1OpValue(const MachineInstr &MI, unsigned Op)
254 uint32_t getAddrMode5OpValue(const MachineInstr &MI, unsigned Op) const {
256 // {12} = (U)nsigned (add == '1', sub == '0')
258 const MachineOperand &MO = MI.getOperand(Op);
259 const MachineOperand &MO1 = MI.getOperand(Op + 1);
261 emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry);
264 unsigned Reg = getARMRegisterNumbering(MO.getReg());
265 int32_t Imm12 = MO1.getImm();
267 // Special value for #-0
268 if (Imm12 == INT32_MIN)
271 // Immediate is always encoded as positive. The 'U' bit controls add vs
279 uint32_t Binary = Imm12 & 0xfff;
282 Binary |= (Reg << 13);
285 unsigned getNEONVcvtImm32OpValue(const MachineInstr &MI, unsigned Op)
288 unsigned getRegisterListOpValue(const MachineInstr &MI, unsigned Op)
291 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
292 /// machine operand requires relocation, record the relocation and return
294 unsigned getMovi32Value(const MachineInstr &MI,const MachineOperand &MO,
297 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
299 unsigned getShiftOp(unsigned Imm) const ;
301 /// Routines that handle operands which add machine relocations which are
302 /// fixed up by the relocation stage.
303 void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
304 bool MayNeedFarStub, bool Indirect,
305 intptr_t ACPV = 0) const;
306 void emitExternalSymbolAddress(const char *ES, unsigned Reloc) const;
307 void emitConstPoolAddress(unsigned CPI, unsigned Reloc) const;
308 void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const;
309 void emitMachineBasicBlock(MachineBasicBlock *BB, unsigned Reloc,
310 intptr_t JTBase = 0) const;
314 char ARMCodeEmitter::ID = 0;
316 /// createARMJITCodeEmitterPass - Return a pass that emits the collected ARM
317 /// code to the specified MCE object.
318 FunctionPass *llvm::createARMJITCodeEmitterPass(ARMBaseTargetMachine &TM,
319 JITCodeEmitter &JCE) {
320 return new ARMCodeEmitter(TM, JCE);
323 bool ARMCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
324 assert((MF.getTarget().getRelocationModel() != Reloc::Default ||
325 MF.getTarget().getRelocationModel() != Reloc::Static) &&
326 "JIT relocation model must be set to static or default!");
327 JTI = ((ARMTargetMachine &)MF.getTarget()).getJITInfo();
328 II = ((const ARMTargetMachine &)MF.getTarget()).getInstrInfo();
329 TD = ((const ARMTargetMachine &)MF.getTarget()).getTargetData();
330 Subtarget = &TM.getSubtarget<ARMSubtarget>();
331 MCPEs = &MF.getConstantPool()->getConstants();
333 if (MF.getJumpTableInfo()) MJTEs = &MF.getJumpTableInfo()->getJumpTables();
334 IsPIC = TM.getRelocationModel() == Reloc::PIC_;
335 IsThumb = MF.getInfo<ARMFunctionInfo>()->isThumbFunction();
336 JTI->Initialize(MF, IsPIC);
337 MMI = &getAnalysis<MachineModuleInfo>();
338 MCE.setModuleInfo(MMI);
341 DEBUG(errs() << "JITTing function '"
342 << MF.getFunction()->getName() << "'\n");
343 MCE.startFunction(MF);
344 for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
346 MCE.StartMachineBasicBlock(MBB);
347 for (MachineBasicBlock::const_iterator I = MBB->begin(), E = MBB->end();
351 } while (MCE.finishFunction(MF));
356 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
358 unsigned ARMCodeEmitter::getShiftOp(unsigned Imm) const {
359 switch (ARM_AM::getAM2ShiftOpc(Imm)) {
360 default: llvm_unreachable("Unknown shift opc!");
361 case ARM_AM::asr: return 2;
362 case ARM_AM::lsl: return 0;
363 case ARM_AM::lsr: return 1;
365 case ARM_AM::rrx: return 3;
370 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
371 /// machine operand requires relocation, record the relocation and return zero.
372 unsigned ARMCodeEmitter::getMovi32Value(const MachineInstr &MI,
373 const MachineOperand &MO,
375 assert(((Reloc == ARM::reloc_arm_movt) || (Reloc == ARM::reloc_arm_movw))
376 && "Relocation to this function should be for movt or movw");
379 return static_cast<unsigned>(MO.getImm());
380 else if (MO.isGlobal())
381 emitGlobalAddress(MO.getGlobal(), Reloc, true, false);
382 else if (MO.isSymbol())
383 emitExternalSymbolAddress(MO.getSymbolName(), Reloc);
385 emitMachineBasicBlock(MO.getMBB(), Reloc);
390 llvm_unreachable("Unsupported operand type for movw/movt");
395 /// getMachineOpValue - Return binary encoding of operand. If the machine
396 /// operand requires relocation, record the relocation and return zero.
397 unsigned ARMCodeEmitter::getMachineOpValue(const MachineInstr &MI,
398 const MachineOperand &MO) const {
400 return getARMRegisterNumbering(MO.getReg());
402 return static_cast<unsigned>(MO.getImm());
403 else if (MO.isGlobal())
404 emitGlobalAddress(MO.getGlobal(), ARM::reloc_arm_branch, true, false);
405 else if (MO.isSymbol())
406 emitExternalSymbolAddress(MO.getSymbolName(), ARM::reloc_arm_branch);
407 else if (MO.isCPI()) {
408 const TargetInstrDesc &TID = MI.getDesc();
409 // For VFP load, the immediate offset is multiplied by 4.
410 unsigned Reloc = ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPLdStFrm)
411 ? ARM::reloc_arm_vfp_cp_entry : ARM::reloc_arm_cp_entry;
412 emitConstPoolAddress(MO.getIndex(), Reloc);
413 } else if (MO.isJTI())
414 emitJumpTableAddress(MO.getIndex(), ARM::reloc_arm_relative);
416 emitMachineBasicBlock(MO.getMBB(), ARM::reloc_arm_branch);
418 llvm_unreachable("Unable to encode MachineOperand!");
422 /// emitGlobalAddress - Emit the specified address to the code stream.
424 void ARMCodeEmitter::emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
425 bool MayNeedFarStub, bool Indirect,
426 intptr_t ACPV) const {
427 MachineRelocation MR = Indirect
428 ? MachineRelocation::getIndirectSymbol(MCE.getCurrentPCOffset(), Reloc,
429 const_cast<GlobalValue *>(GV),
430 ACPV, MayNeedFarStub)
431 : MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc,
432 const_cast<GlobalValue *>(GV), ACPV,
434 MCE.addRelocation(MR);
437 /// emitExternalSymbolAddress - Arrange for the address of an external symbol to
438 /// be emitted to the current location in the function, and allow it to be PC
440 void ARMCodeEmitter::
441 emitExternalSymbolAddress(const char *ES, unsigned Reloc) const {
442 MCE.addRelocation(MachineRelocation::getExtSym(MCE.getCurrentPCOffset(),
446 /// emitConstPoolAddress - Arrange for the address of an constant pool
447 /// to be emitted to the current location in the function, and allow it to be PC
449 void ARMCodeEmitter::emitConstPoolAddress(unsigned CPI, unsigned Reloc) const {
450 // Tell JIT emitter we'll resolve the address.
451 MCE.addRelocation(MachineRelocation::getConstPool(MCE.getCurrentPCOffset(),
452 Reloc, CPI, 0, true));
455 /// emitJumpTableAddress - Arrange for the address of a jump table to
456 /// be emitted to the current location in the function, and allow it to be PC
458 void ARMCodeEmitter::
459 emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const {
460 MCE.addRelocation(MachineRelocation::getJumpTable(MCE.getCurrentPCOffset(),
461 Reloc, JTIndex, 0, true));
464 /// emitMachineBasicBlock - Emit the specified address basic block.
465 void ARMCodeEmitter::emitMachineBasicBlock(MachineBasicBlock *BB,
467 intptr_t JTBase) const {
468 MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(),
472 void ARMCodeEmitter::emitWordLE(unsigned Binary) {
473 DEBUG(errs() << " 0x";
474 errs().write_hex(Binary) << "\n");
475 MCE.emitWordLE(Binary);
478 void ARMCodeEmitter::emitDWordLE(uint64_t Binary) {
479 DEBUG(errs() << " 0x";
480 errs().write_hex(Binary) << "\n");
481 MCE.emitDWordLE(Binary);
484 void ARMCodeEmitter::emitInstruction(const MachineInstr &MI) {
485 DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << MI);
487 MCE.processDebugLoc(MI.getDebugLoc(), true);
489 ++NumEmitted; // Keep track of the # of mi's emitted
490 switch (MI.getDesc().TSFlags & ARMII::FormMask) {
492 llvm_unreachable("Unhandled instruction encoding format!");
496 if (MI.getOpcode() == ARM::LEApcrelJT) {
497 // Materialize jumptable address.
498 emitLEApcrelJTInstruction(MI);
501 llvm_unreachable("Unhandled instruction encoding!");
504 emitPseudoInstruction(MI);
507 case ARMII::DPSoRegFrm:
508 emitDataProcessingInstruction(MI);
512 emitLoadStoreInstruction(MI);
514 case ARMII::LdMiscFrm:
515 case ARMII::StMiscFrm:
516 emitMiscLoadStoreInstruction(MI);
518 case ARMII::LdStMulFrm:
519 emitLoadStoreMultipleInstruction(MI);
522 emitMulFrmInstruction(MI);
525 emitExtendInstruction(MI);
527 case ARMII::ArithMiscFrm:
528 emitMiscArithInstruction(MI);
531 emitSaturateInstruction(MI);
534 emitBranchInstruction(MI);
536 case ARMII::BrMiscFrm:
537 emitMiscBranchInstruction(MI);
540 case ARMII::VFPUnaryFrm:
541 case ARMII::VFPBinaryFrm:
542 emitVFPArithInstruction(MI);
544 case ARMII::VFPConv1Frm:
545 case ARMII::VFPConv2Frm:
546 case ARMII::VFPConv3Frm:
547 case ARMII::VFPConv4Frm:
548 case ARMII::VFPConv5Frm:
549 emitVFPConversionInstruction(MI);
551 case ARMII::VFPLdStFrm:
552 emitVFPLoadStoreInstruction(MI);
554 case ARMII::VFPLdStMulFrm:
555 emitVFPLoadStoreMultipleInstruction(MI);
558 // NEON instructions.
559 case ARMII::NGetLnFrm:
560 case ARMII::NSetLnFrm:
561 emitNEONLaneInstruction(MI);
564 emitNEONDupInstruction(MI);
566 case ARMII::N1RegModImmFrm:
567 emitNEON1RegModImmInstruction(MI);
569 case ARMII::N2RegFrm:
570 emitNEON2RegInstruction(MI);
572 case ARMII::N3RegFrm:
573 emitNEON3RegInstruction(MI);
576 MCE.processDebugLoc(MI.getDebugLoc(), false);
579 void ARMCodeEmitter::emitConstPoolInstruction(const MachineInstr &MI) {
580 unsigned CPI = MI.getOperand(0).getImm(); // CP instruction index.
581 unsigned CPIndex = MI.getOperand(1).getIndex(); // Actual cp entry index.
582 const MachineConstantPoolEntry &MCPE = (*MCPEs)[CPIndex];
584 // Remember the CONSTPOOL_ENTRY address for later relocation.
585 JTI->addConstantPoolEntryAddr(CPI, MCE.getCurrentPCValue());
587 // Emit constpool island entry. In most cases, the actual values will be
588 // resolved and relocated after code emission.
589 if (MCPE.isMachineConstantPoolEntry()) {
590 ARMConstantPoolValue *ACPV =
591 static_cast<ARMConstantPoolValue*>(MCPE.Val.MachineCPVal);
593 DEBUG(errs() << " ** ARM constant pool #" << CPI << " @ "
594 << (void*)MCE.getCurrentPCValue() << " " << *ACPV << '\n');
596 assert(ACPV->isGlobalValue() && "unsupported constant pool value");
597 const GlobalValue *GV = ACPV->getGV();
599 Reloc::Model RelocM = TM.getRelocationModel();
600 emitGlobalAddress(GV, ARM::reloc_arm_machine_cp_entry,
602 Subtarget->GVIsIndirectSymbol(GV, RelocM),
605 emitExternalSymbolAddress(ACPV->getSymbol(), ARM::reloc_arm_absolute);
609 const Constant *CV = MCPE.Val.ConstVal;
612 errs() << " ** Constant pool #" << CPI << " @ "
613 << (void*)MCE.getCurrentPCValue() << " ";
614 if (const Function *F = dyn_cast<Function>(CV))
615 errs() << F->getName();
621 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
622 emitGlobalAddress(GV, ARM::reloc_arm_absolute, isa<Function>(GV), false);
624 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
625 uint32_t Val = uint32_t(*CI->getValue().getRawData());
627 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
628 if (CFP->getType()->isFloatTy())
629 emitWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
630 else if (CFP->getType()->isDoubleTy())
631 emitDWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
633 llvm_unreachable("Unable to handle this constantpool entry!");
636 llvm_unreachable("Unable to handle this constantpool entry!");
641 void ARMCodeEmitter::emitMOVi32immInstruction(const MachineInstr &MI) {
642 const MachineOperand &MO0 = MI.getOperand(0);
643 const MachineOperand &MO1 = MI.getOperand(1);
645 // Emit the 'movw' instruction.
646 unsigned Binary = 0x30 << 20; // mov: Insts{27-20} = 0b00110000
648 unsigned Lo16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movw) & 0xFFFF;
650 // Set the conditional execution predicate.
651 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
654 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
656 // Encode imm16 as imm4:imm12
657 Binary |= Lo16 & 0xFFF; // Insts{11-0} = imm12
658 Binary |= ((Lo16 >> 12) & 0xF) << 16; // Insts{19-16} = imm4
661 unsigned Hi16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movt) >> 16;
662 // Emit the 'movt' instruction.
663 Binary = 0x34 << 20; // movt: Insts{27-20} = 0b00110100
665 // Set the conditional execution predicate.
666 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
669 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
671 // Encode imm16 as imm4:imm1, same as movw above.
672 Binary |= Hi16 & 0xFFF;
673 Binary |= ((Hi16 >> 12) & 0xF) << 16;
677 void ARMCodeEmitter::emitMOVi2piecesInstruction(const MachineInstr &MI) {
678 const MachineOperand &MO0 = MI.getOperand(0);
679 const MachineOperand &MO1 = MI.getOperand(1);
680 assert(MO1.isImm() && ARM_AM::isSOImmTwoPartVal(MO1.getImm()) &&
681 "Not a valid so_imm value!");
682 unsigned V1 = ARM_AM::getSOImmTwoPartFirst(MO1.getImm());
683 unsigned V2 = ARM_AM::getSOImmTwoPartSecond(MO1.getImm());
685 // Emit the 'mov' instruction.
686 unsigned Binary = 0xd << 21; // mov: Insts{24-21} = 0b1101
688 // Set the conditional execution predicate.
689 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
692 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
695 // Set bit I(25) to identify this is the immediate form of <shifter_op>
696 Binary |= 1 << ARMII::I_BitShift;
697 Binary |= getMachineSoImmOpValue(V1);
700 // Now the 'orr' instruction.
701 Binary = 0xc << 21; // orr: Insts{24-21} = 0b1100
703 // Set the conditional execution predicate.
704 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
707 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
710 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRnShift;
713 // Set bit I(25) to identify this is the immediate form of <shifter_op>
714 Binary |= 1 << ARMII::I_BitShift;
715 Binary |= getMachineSoImmOpValue(V2);
719 void ARMCodeEmitter::emitLEApcrelJTInstruction(const MachineInstr &MI) {
720 // It's basically add r, pc, (LJTI - $+8)
722 const TargetInstrDesc &TID = MI.getDesc();
724 // Emit the 'add' instruction.
725 unsigned Binary = 0x4 << 21; // add: Insts{24-21} = 0b0100
727 // Set the conditional execution predicate
728 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
730 // Encode S bit if MI modifies CPSR.
731 Binary |= getAddrModeSBit(MI, TID);
734 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
736 // Encode Rn which is PC.
737 Binary |= getARMRegisterNumbering(ARM::PC) << ARMII::RegRnShift;
739 // Encode the displacement.
740 Binary |= 1 << ARMII::I_BitShift;
741 emitJumpTableAddress(MI.getOperand(1).getIndex(), ARM::reloc_arm_jt_base);
746 void ARMCodeEmitter::emitPseudoMoveInstruction(const MachineInstr &MI) {
747 unsigned Opcode = MI.getDesc().Opcode;
749 // Part of binary is determined by TableGn.
750 unsigned Binary = getBinaryCodeForInstr(MI);
752 // Set the conditional execution predicate
753 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
755 // Encode S bit if MI modifies CPSR.
756 if (Opcode == ARM::MOVsrl_flag || Opcode == ARM::MOVsra_flag)
757 Binary |= 1 << ARMII::S_BitShift;
759 // Encode register def if there is one.
760 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
762 // Encode the shift operation.
769 case ARM::MOVsrl_flag:
771 Binary |= (0x2 << 4) | (1 << 7);
773 case ARM::MOVsra_flag:
775 Binary |= (0x4 << 4) | (1 << 7);
779 // Encode register Rm.
780 Binary |= getMachineOpValue(MI, 1);
785 void ARMCodeEmitter::addPCLabel(unsigned LabelID) {
786 DEBUG(errs() << " ** LPC" << LabelID << " @ "
787 << (void*)MCE.getCurrentPCValue() << '\n');
788 JTI->addPCLabelAddr(LabelID, MCE.getCurrentPCValue());
791 void ARMCodeEmitter::emitPseudoInstruction(const MachineInstr &MI) {
792 unsigned Opcode = MI.getDesc().Opcode;
795 llvm_unreachable("ARMCodeEmitter::emitPseudoInstruction");
797 case ARM::BMOVPCRX_CALL:
799 case ARM::BMOVPCRXr9_CALL: {
800 // First emit mov lr, pc
801 unsigned Binary = 0x01a0e00f;
802 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
805 // and then emit the branch.
806 emitMiscBranchInstruction(MI);
809 case TargetOpcode::INLINEASM: {
810 // We allow inline assembler nodes with empty bodies - they can
811 // implicitly define registers, which is ok for JIT.
812 if (MI.getOperand(0).getSymbolName()[0]) {
813 report_fatal_error("JIT does not support inline asm!");
817 case TargetOpcode::PROLOG_LABEL:
818 case TargetOpcode::EH_LABEL:
819 MCE.emitLabel(MI.getOperand(0).getMCSymbol());
821 case TargetOpcode::IMPLICIT_DEF:
822 case TargetOpcode::KILL:
825 case ARM::CONSTPOOL_ENTRY:
826 emitConstPoolInstruction(MI);
829 // Remember of the address of the PC label for relocation later.
830 addPCLabel(MI.getOperand(2).getImm());
831 // PICADD is just an add instruction that implicitly read pc.
832 emitDataProcessingInstruction(MI, 0, ARM::PC);
839 // Remember of the address of the PC label for relocation later.
840 addPCLabel(MI.getOperand(2).getImm());
841 // These are just load / store instructions that implicitly read pc.
842 emitLoadStoreInstruction(MI, 0, ARM::PC);
849 // Remember of the address of the PC label for relocation later.
850 addPCLabel(MI.getOperand(2).getImm());
851 // These are just load / store instructions that implicitly read pc.
852 emitMiscLoadStoreInstruction(MI, ARM::PC);
857 // Two instructions to materialize a constant.
858 if (Subtarget->hasV6T2Ops())
859 emitMOVi32immInstruction(MI);
861 emitMOVi2piecesInstruction(MI);
864 case ARM::LEApcrelJT:
865 // Materialize jumptable address.
866 emitLEApcrelJTInstruction(MI);
869 case ARM::MOVsrl_flag:
870 case ARM::MOVsra_flag:
871 emitPseudoMoveInstruction(MI);
876 unsigned ARMCodeEmitter::getMachineSoRegOpValue(const MachineInstr &MI,
877 const TargetInstrDesc &TID,
878 const MachineOperand &MO,
880 unsigned Binary = getMachineOpValue(MI, MO);
882 const MachineOperand &MO1 = MI.getOperand(OpIdx + 1);
883 const MachineOperand &MO2 = MI.getOperand(OpIdx + 2);
884 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO2.getImm());
886 // Encode the shift opcode.
888 unsigned Rs = MO1.getReg();
890 // Set shift operand (bit[7:4]).
895 // RRX - 0110 and bit[11:8] clear.
897 default: llvm_unreachable("Unknown shift opc!");
898 case ARM_AM::lsl: SBits = 0x1; break;
899 case ARM_AM::lsr: SBits = 0x3; break;
900 case ARM_AM::asr: SBits = 0x5; break;
901 case ARM_AM::ror: SBits = 0x7; break;
902 case ARM_AM::rrx: SBits = 0x6; break;
905 // Set shift operand (bit[6:4]).
911 default: llvm_unreachable("Unknown shift opc!");
912 case ARM_AM::lsl: SBits = 0x0; break;
913 case ARM_AM::lsr: SBits = 0x2; break;
914 case ARM_AM::asr: SBits = 0x4; break;
915 case ARM_AM::ror: SBits = 0x6; break;
918 Binary |= SBits << 4;
919 if (SOpc == ARM_AM::rrx)
922 // Encode the shift operation Rs or shift_imm (except rrx).
924 // Encode Rs bit[11:8].
925 assert(ARM_AM::getSORegOffset(MO2.getImm()) == 0);
926 return Binary | (getARMRegisterNumbering(Rs) << ARMII::RegRsShift);
929 // Encode shift_imm bit[11:7].
930 return Binary | ARM_AM::getSORegOffset(MO2.getImm()) << 7;
933 unsigned ARMCodeEmitter::getMachineSoImmOpValue(unsigned SoImm) {
934 int SoImmVal = ARM_AM::getSOImmVal(SoImm);
935 assert(SoImmVal != -1 && "Not a valid so_imm value!");
937 // Encode rotate_imm.
938 unsigned Binary = (ARM_AM::getSOImmValRot((unsigned)SoImmVal) >> 1)
939 << ARMII::SoRotImmShift;
942 Binary |= ARM_AM::getSOImmValImm((unsigned)SoImmVal);
946 unsigned ARMCodeEmitter::getAddrModeSBit(const MachineInstr &MI,
947 const TargetInstrDesc &TID) const {
948 for (unsigned i = MI.getNumOperands(), e = TID.getNumOperands(); i != e; --i){
949 const MachineOperand &MO = MI.getOperand(i-1);
950 if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR)
951 return 1 << ARMII::S_BitShift;
956 void ARMCodeEmitter::emitDataProcessingInstruction(const MachineInstr &MI,
958 unsigned ImplicitRn) {
959 const TargetInstrDesc &TID = MI.getDesc();
961 // Part of binary is determined by TableGn.
962 unsigned Binary = getBinaryCodeForInstr(MI);
964 // Set the conditional execution predicate
965 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
967 // Encode S bit if MI modifies CPSR.
968 Binary |= getAddrModeSBit(MI, TID);
970 // Encode register def if there is one.
971 unsigned NumDefs = TID.getNumDefs();
974 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
976 // Special handling for implicit use (e.g. PC).
977 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
979 if (TID.Opcode == ARM::MOVi16) {
980 // Get immediate from MI.
981 unsigned Lo16 = getMovi32Value(MI, MI.getOperand(OpIdx),
982 ARM::reloc_arm_movw);
983 // Encode imm which is the same as in emitMOVi32immInstruction().
984 Binary |= Lo16 & 0xFFF;
985 Binary |= ((Lo16 >> 12) & 0xF) << 16;
988 } else if(TID.Opcode == ARM::MOVTi16) {
989 unsigned Hi16 = (getMovi32Value(MI, MI.getOperand(OpIdx),
990 ARM::reloc_arm_movt) >> 16);
991 Binary |= Hi16 & 0xFFF;
992 Binary |= ((Hi16 >> 12) & 0xF) << 16;
995 } else if ((TID.Opcode == ARM::BFC) || (TID.Opcode == ARM::BFI)) {
996 uint32_t v = ~MI.getOperand(2).getImm();
997 int32_t lsb = CountTrailingZeros_32(v);
998 int32_t msb = (32 - CountLeadingZeros_32(v)) - 1;
999 // Instr{20-16} = msb, Instr{11-7} = lsb
1000 Binary |= (msb & 0x1F) << 16;
1001 Binary |= (lsb & 0x1F) << 7;
1004 } else if ((TID.Opcode == ARM::UBFX) || (TID.Opcode == ARM::SBFX)) {
1005 // Encode Rn in Instr{0-3}
1006 Binary |= getMachineOpValue(MI, OpIdx++);
1008 uint32_t lsb = MI.getOperand(OpIdx++).getImm();
1009 uint32_t widthm1 = MI.getOperand(OpIdx++).getImm() - 1;
1011 // Instr{20-16} = widthm1, Instr{11-7} = lsb
1012 Binary |= (widthm1 & 0x1F) << 16;
1013 Binary |= (lsb & 0x1F) << 7;
1018 // If this is a two-address operand, skip it. e.g. MOVCCr operand 1.
1019 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1022 // Encode first non-shifter register operand if there is one.
1023 bool isUnary = TID.TSFlags & ARMII::UnaryDP;
1026 // Special handling for implicit use (e.g. PC).
1027 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1029 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRnShift;
1034 // Encode shifter operand.
1035 const MachineOperand &MO = MI.getOperand(OpIdx);
1036 if ((TID.TSFlags & ARMII::FormMask) == ARMII::DPSoRegFrm) {
1038 emitWordLE(Binary | getMachineSoRegOpValue(MI, TID, MO, OpIdx));
1043 // Encode register Rm.
1044 emitWordLE(Binary | getARMRegisterNumbering(MO.getReg()));
1049 Binary |= getMachineSoImmOpValue((unsigned)MO.getImm());
1054 void ARMCodeEmitter::emitLoadStoreInstruction(const MachineInstr &MI,
1055 unsigned ImplicitRd,
1056 unsigned ImplicitRn) {
1057 const TargetInstrDesc &TID = MI.getDesc();
1058 unsigned Form = TID.TSFlags & ARMII::FormMask;
1059 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1061 // Part of binary is determined by TableGn.
1062 unsigned Binary = getBinaryCodeForInstr(MI);
1064 // If this is an LDRi12, STRi12 or LDRcp, nothing more needs be done.
1065 if (MI.getOpcode() == ARM::LDRi12 || MI.getOpcode() == ARM::LDRcp ||
1066 MI.getOpcode() == ARM::STRi12) {
1071 // Set the conditional execution predicate
1072 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1076 // Operand 0 of a pre- and post-indexed store is the address base
1077 // writeback. Skip it.
1078 bool Skipped = false;
1079 if (IsPrePost && Form == ARMII::StFrm) {
1084 // Set first operand
1086 // Special handling for implicit use (e.g. PC).
1087 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
1089 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1091 // Set second operand
1093 // Special handling for implicit use (e.g. PC).
1094 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1096 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1098 // If this is a two-address operand, skip it. e.g. LDR_PRE.
1099 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1102 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1103 unsigned AM2Opc = (ImplicitRn == ARM::PC)
1104 ? 0 : MI.getOperand(OpIdx+1).getImm();
1106 // Set bit U(23) according to sign of immed value (positive or negative).
1107 Binary |= ((ARM_AM::getAM2Op(AM2Opc) == ARM_AM::add ? 1 : 0) <<
1109 if (!MO2.getReg()) { // is immediate
1110 if (ARM_AM::getAM2Offset(AM2Opc))
1111 // Set the value of offset_12 field
1112 Binary |= ARM_AM::getAM2Offset(AM2Opc);
1117 // Set bit I(25), because this is not in immediate encoding.
1118 Binary |= 1 << ARMII::I_BitShift;
1119 assert(TargetRegisterInfo::isPhysicalRegister(MO2.getReg()));
1120 // Set bit[3:0] to the corresponding Rm register
1121 Binary |= getARMRegisterNumbering(MO2.getReg());
1123 // If this instr is in scaled register offset/index instruction, set
1124 // shift_immed(bit[11:7]) and shift(bit[6:5]) fields.
1125 if (unsigned ShImm = ARM_AM::getAM2Offset(AM2Opc)) {
1126 Binary |= getShiftOp(AM2Opc) << ARMII::ShiftImmShift; // shift
1127 Binary |= ShImm << ARMII::ShiftShift; // shift_immed
1133 void ARMCodeEmitter::emitMiscLoadStoreInstruction(const MachineInstr &MI,
1134 unsigned ImplicitRn) {
1135 const TargetInstrDesc &TID = MI.getDesc();
1136 unsigned Form = TID.TSFlags & ARMII::FormMask;
1137 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1139 // Part of binary is determined by TableGn.
1140 unsigned Binary = getBinaryCodeForInstr(MI);
1142 // Set the conditional execution predicate
1143 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1147 // Operand 0 of a pre- and post-indexed store is the address base
1148 // writeback. Skip it.
1149 bool Skipped = false;
1150 if (IsPrePost && Form == ARMII::StMiscFrm) {
1155 // Set first operand
1156 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1158 // Skip LDRD and STRD's second operand.
1159 if (TID.Opcode == ARM::LDRD || TID.Opcode == ARM::STRD)
1162 // Set second operand
1164 // Special handling for implicit use (e.g. PC).
1165 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1167 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1169 // If this is a two-address operand, skip it. e.g. LDRH_POST.
1170 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1173 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1174 unsigned AM3Opc = (ImplicitRn == ARM::PC)
1175 ? 0 : MI.getOperand(OpIdx+1).getImm();
1177 // Set bit U(23) according to sign of immed value (positive or negative)
1178 Binary |= ((ARM_AM::getAM3Op(AM3Opc) == ARM_AM::add ? 1 : 0) <<
1181 // If this instr is in register offset/index encoding, set bit[3:0]
1182 // to the corresponding Rm register.
1184 Binary |= getARMRegisterNumbering(MO2.getReg());
1189 // This instr is in immediate offset/index encoding, set bit 22 to 1.
1190 Binary |= 1 << ARMII::AM3_I_BitShift;
1191 if (unsigned ImmOffs = ARM_AM::getAM3Offset(AM3Opc)) {
1193 Binary |= (ImmOffs >> 4) << ARMII::ImmHiShift; // immedH
1194 Binary |= (ImmOffs & 0xF); // immedL
1200 static unsigned getAddrModeUPBits(unsigned Mode) {
1201 unsigned Binary = 0;
1203 // Set addressing mode by modifying bits U(23) and P(24)
1204 // IA - Increment after - bit U = 1 and bit P = 0
1205 // IB - Increment before - bit U = 1 and bit P = 1
1206 // DA - Decrement after - bit U = 0 and bit P = 0
1207 // DB - Decrement before - bit U = 0 and bit P = 1
1209 default: llvm_unreachable("Unknown addressing sub-mode!");
1210 case ARM_AM::da: break;
1211 case ARM_AM::db: Binary |= 0x1 << ARMII::P_BitShift; break;
1212 case ARM_AM::ia: Binary |= 0x1 << ARMII::U_BitShift; break;
1213 case ARM_AM::ib: Binary |= 0x3 << ARMII::U_BitShift; break;
1219 void ARMCodeEmitter::emitLoadStoreMultipleInstruction(const MachineInstr &MI) {
1220 const TargetInstrDesc &TID = MI.getDesc();
1221 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1223 // Part of binary is determined by TableGn.
1224 unsigned Binary = getBinaryCodeForInstr(MI);
1226 // Set the conditional execution predicate
1227 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1229 // Skip operand 0 of an instruction with base register update.
1234 // Set base address operand
1235 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1237 // Set addressing mode by modifying bits U(23) and P(24)
1238 ARM_AM::AMSubMode Mode = ARM_AM::getLoadStoreMultipleSubMode(MI.getOpcode());
1239 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(Mode));
1243 Binary |= 0x1 << ARMII::W_BitShift;
1246 for (unsigned i = OpIdx+2, e = MI.getNumOperands(); i != e; ++i) {
1247 const MachineOperand &MO = MI.getOperand(i);
1248 if (!MO.isReg() || MO.isImplicit())
1250 unsigned RegNum = getARMRegisterNumbering(MO.getReg());
1251 assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
1253 Binary |= 0x1 << RegNum;
1259 void ARMCodeEmitter::emitMulFrmInstruction(const MachineInstr &MI) {
1260 const TargetInstrDesc &TID = MI.getDesc();
1262 // Part of binary is determined by TableGn.
1263 unsigned Binary = getBinaryCodeForInstr(MI);
1265 // Set the conditional execution predicate
1266 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1268 // Encode S bit if MI modifies CPSR.
1269 Binary |= getAddrModeSBit(MI, TID);
1271 // 32x32->64bit operations have two destination registers. The number
1272 // of register definitions will tell us if that's what we're dealing with.
1274 if (TID.getNumDefs() == 2)
1275 Binary |= getMachineOpValue (MI, OpIdx++) << ARMII::RegRdLoShift;
1278 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdHiShift;
1281 Binary |= getMachineOpValue(MI, OpIdx++);
1284 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRsShift;
1286 // Many multiple instructions (e.g. MLA) have three src operands. Encode
1287 // it as Rn (for multiply, that's in the same offset as RdLo.
1288 if (TID.getNumOperands() > OpIdx &&
1289 !TID.OpInfo[OpIdx].isPredicate() &&
1290 !TID.OpInfo[OpIdx].isOptionalDef())
1291 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRdLoShift;
1296 void ARMCodeEmitter::emitExtendInstruction(const MachineInstr &MI) {
1297 const TargetInstrDesc &TID = MI.getDesc();
1299 // Part of binary is determined by TableGn.
1300 unsigned Binary = getBinaryCodeForInstr(MI);
1302 // Set the conditional execution predicate
1303 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1308 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1310 const MachineOperand &MO1 = MI.getOperand(OpIdx++);
1311 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1313 // Two register operand form.
1315 Binary |= getMachineOpValue(MI, MO1) << ARMII::RegRnShift;
1318 Binary |= getMachineOpValue(MI, MO2);
1321 Binary |= getMachineOpValue(MI, MO1);
1324 // Encode rot imm (0, 8, 16, or 24) if it has a rotate immediate operand.
1325 if (MI.getOperand(OpIdx).isImm() &&
1326 !TID.OpInfo[OpIdx].isPredicate() &&
1327 !TID.OpInfo[OpIdx].isOptionalDef())
1328 Binary |= (getMachineOpValue(MI, OpIdx) / 8) << ARMII::ExtRotImmShift;
1333 void ARMCodeEmitter::emitMiscArithInstruction(const MachineInstr &MI) {
1334 const TargetInstrDesc &TID = MI.getDesc();
1336 // Part of binary is determined by TableGn.
1337 unsigned Binary = getBinaryCodeForInstr(MI);
1339 // Set the conditional execution predicate
1340 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1345 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1347 const MachineOperand &MO = MI.getOperand(OpIdx++);
1348 if (OpIdx == TID.getNumOperands() ||
1349 TID.OpInfo[OpIdx].isPredicate() ||
1350 TID.OpInfo[OpIdx].isOptionalDef()) {
1351 // Encode Rm and it's done.
1352 Binary |= getMachineOpValue(MI, MO);
1358 Binary |= getMachineOpValue(MI, MO) << ARMII::RegRnShift;
1361 Binary |= getMachineOpValue(MI, OpIdx++);
1363 // Encode shift_imm.
1364 unsigned ShiftAmt = MI.getOperand(OpIdx).getImm();
1365 if (TID.Opcode == ARM::PKHTB) {
1366 assert(ShiftAmt != 0 && "PKHTB shift_imm is 0!");
1370 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1371 Binary |= ShiftAmt << ARMII::ShiftShift;
1376 void ARMCodeEmitter::emitSaturateInstruction(const MachineInstr &MI) {
1377 const TargetInstrDesc &TID = MI.getDesc();
1379 // Part of binary is determined by TableGen.
1380 unsigned Binary = getBinaryCodeForInstr(MI);
1382 // Set the conditional execution predicate
1383 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1386 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
1388 // Encode saturate bit position.
1389 unsigned Pos = MI.getOperand(1).getImm();
1390 if (TID.Opcode == ARM::SSAT || TID.Opcode == ARM::SSAT16)
1392 assert((Pos < 16 || (Pos < 32 &&
1393 TID.Opcode != ARM::SSAT16 &&
1394 TID.Opcode != ARM::USAT16)) &&
1395 "saturate bit position out of range");
1396 Binary |= Pos << 16;
1399 Binary |= getMachineOpValue(MI, 2);
1401 // Encode shift_imm.
1402 if (TID.getNumOperands() == 4) {
1403 unsigned ShiftOp = MI.getOperand(3).getImm();
1404 ARM_AM::ShiftOpc Opc = ARM_AM::getSORegShOp(ShiftOp);
1405 if (Opc == ARM_AM::asr)
1407 unsigned ShiftAmt = MI.getOperand(3).getImm();
1408 if (ShiftAmt == 32 && Opc == ARM_AM::asr)
1410 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1411 Binary |= ShiftAmt << ARMII::ShiftShift;
1417 void ARMCodeEmitter::emitBranchInstruction(const MachineInstr &MI) {
1418 const TargetInstrDesc &TID = MI.getDesc();
1420 if (TID.Opcode == ARM::TPsoft) {
1421 llvm_unreachable("ARM::TPsoft FIXME"); // FIXME
1424 // Part of binary is determined by TableGn.
1425 unsigned Binary = getBinaryCodeForInstr(MI);
1427 // Set the conditional execution predicate
1428 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1430 // Set signed_immed_24 field
1431 Binary |= getMachineOpValue(MI, 0);
1436 void ARMCodeEmitter::emitInlineJumpTable(unsigned JTIndex) {
1437 // Remember the base address of the inline jump table.
1438 uintptr_t JTBase = MCE.getCurrentPCValue();
1439 JTI->addJumpTableBaseAddr(JTIndex, JTBase);
1440 DEBUG(errs() << " ** Jump Table #" << JTIndex << " @ " << (void*)JTBase
1443 // Now emit the jump table entries.
1444 const std::vector<MachineBasicBlock*> &MBBs = (*MJTEs)[JTIndex].MBBs;
1445 for (unsigned i = 0, e = MBBs.size(); i != e; ++i) {
1447 // DestBB address - JT base.
1448 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_pic_jt, JTBase);
1450 // Absolute DestBB address.
1451 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_absolute);
1456 void ARMCodeEmitter::emitMiscBranchInstruction(const MachineInstr &MI) {
1457 const TargetInstrDesc &TID = MI.getDesc();
1459 // Handle jump tables.
1460 if (TID.Opcode == ARM::BR_JTr || TID.Opcode == ARM::BR_JTadd) {
1461 // First emit a ldr pc, [] instruction.
1462 emitDataProcessingInstruction(MI, ARM::PC);
1464 // Then emit the inline jump table.
1466 (TID.Opcode == ARM::BR_JTr)
1467 ? MI.getOperand(1).getIndex() : MI.getOperand(2).getIndex();
1468 emitInlineJumpTable(JTIndex);
1470 } else if (TID.Opcode == ARM::BR_JTm) {
1471 // First emit a ldr pc, [] instruction.
1472 emitLoadStoreInstruction(MI, ARM::PC);
1474 // Then emit the inline jump table.
1475 emitInlineJumpTable(MI.getOperand(3).getIndex());
1479 // Part of binary is determined by TableGn.
1480 unsigned Binary = getBinaryCodeForInstr(MI);
1482 // Set the conditional execution predicate
1483 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1485 if (TID.Opcode == ARM::BX_RET || TID.Opcode == ARM::MOVPCLR)
1486 // The return register is LR.
1487 Binary |= getARMRegisterNumbering(ARM::LR);
1489 // otherwise, set the return register
1490 Binary |= getMachineOpValue(MI, 0);
1495 static unsigned encodeVFPRd(const MachineInstr &MI, unsigned OpIdx) {
1496 unsigned RegD = MI.getOperand(OpIdx).getReg();
1497 unsigned Binary = 0;
1498 bool isSPVFP = ARM::SPRRegisterClass->contains(RegD);
1499 RegD = getARMRegisterNumbering(RegD);
1501 Binary |= RegD << ARMII::RegRdShift;
1503 Binary |= ((RegD & 0x1E) >> 1) << ARMII::RegRdShift;
1504 Binary |= (RegD & 0x01) << ARMII::D_BitShift;
1509 static unsigned encodeVFPRn(const MachineInstr &MI, unsigned OpIdx) {
1510 unsigned RegN = MI.getOperand(OpIdx).getReg();
1511 unsigned Binary = 0;
1512 bool isSPVFP = ARM::SPRRegisterClass->contains(RegN);
1513 RegN = getARMRegisterNumbering(RegN);
1515 Binary |= RegN << ARMII::RegRnShift;
1517 Binary |= ((RegN & 0x1E) >> 1) << ARMII::RegRnShift;
1518 Binary |= (RegN & 0x01) << ARMII::N_BitShift;
1523 static unsigned encodeVFPRm(const MachineInstr &MI, unsigned OpIdx) {
1524 unsigned RegM = MI.getOperand(OpIdx).getReg();
1525 unsigned Binary = 0;
1526 bool isSPVFP = ARM::SPRRegisterClass->contains(RegM);
1527 RegM = getARMRegisterNumbering(RegM);
1531 Binary |= ((RegM & 0x1E) >> 1);
1532 Binary |= (RegM & 0x01) << ARMII::M_BitShift;
1537 void ARMCodeEmitter::emitVFPArithInstruction(const MachineInstr &MI) {
1538 const TargetInstrDesc &TID = MI.getDesc();
1540 // Part of binary is determined by TableGn.
1541 unsigned Binary = getBinaryCodeForInstr(MI);
1543 // Set the conditional execution predicate
1544 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1547 assert((Binary & ARMII::D_BitShift) == 0 &&
1548 (Binary & ARMII::N_BitShift) == 0 &&
1549 (Binary & ARMII::M_BitShift) == 0 && "VFP encoding bug!");
1552 Binary |= encodeVFPRd(MI, OpIdx++);
1554 // If this is a two-address operand, skip it, e.g. FMACD.
1555 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1559 if ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPBinaryFrm)
1560 Binary |= encodeVFPRn(MI, OpIdx++);
1562 if (OpIdx == TID.getNumOperands() ||
1563 TID.OpInfo[OpIdx].isPredicate() ||
1564 TID.OpInfo[OpIdx].isOptionalDef()) {
1565 // FCMPEZD etc. has only one operand.
1571 Binary |= encodeVFPRm(MI, OpIdx);
1576 void ARMCodeEmitter::emitVFPConversionInstruction(const MachineInstr &MI) {
1577 const TargetInstrDesc &TID = MI.getDesc();
1578 unsigned Form = TID.TSFlags & ARMII::FormMask;
1580 // Part of binary is determined by TableGn.
1581 unsigned Binary = getBinaryCodeForInstr(MI);
1583 // Set the conditional execution predicate
1584 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1588 case ARMII::VFPConv1Frm:
1589 case ARMII::VFPConv2Frm:
1590 case ARMII::VFPConv3Frm:
1592 Binary |= encodeVFPRd(MI, 0);
1594 case ARMII::VFPConv4Frm:
1596 Binary |= encodeVFPRn(MI, 0);
1598 case ARMII::VFPConv5Frm:
1600 Binary |= encodeVFPRm(MI, 0);
1606 case ARMII::VFPConv1Frm:
1608 Binary |= encodeVFPRm(MI, 1);
1610 case ARMII::VFPConv2Frm:
1611 case ARMII::VFPConv3Frm:
1613 Binary |= encodeVFPRn(MI, 1);
1615 case ARMII::VFPConv4Frm:
1616 case ARMII::VFPConv5Frm:
1618 Binary |= encodeVFPRd(MI, 1);
1622 if (Form == ARMII::VFPConv5Frm)
1624 Binary |= encodeVFPRn(MI, 2);
1625 else if (Form == ARMII::VFPConv3Frm)
1627 Binary |= encodeVFPRm(MI, 2);
1632 void ARMCodeEmitter::emitVFPLoadStoreInstruction(const MachineInstr &MI) {
1633 // Part of binary is determined by TableGn.
1634 unsigned Binary = getBinaryCodeForInstr(MI);
1636 // Set the conditional execution predicate
1637 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1642 Binary |= encodeVFPRd(MI, OpIdx++);
1644 // Encode address base.
1645 const MachineOperand &Base = MI.getOperand(OpIdx++);
1646 Binary |= getMachineOpValue(MI, Base) << ARMII::RegRnShift;
1648 // If there is a non-zero immediate offset, encode it.
1650 const MachineOperand &Offset = MI.getOperand(OpIdx);
1651 if (unsigned ImmOffs = ARM_AM::getAM5Offset(Offset.getImm())) {
1652 if (ARM_AM::getAM5Op(Offset.getImm()) == ARM_AM::add)
1653 Binary |= 1 << ARMII::U_BitShift;
1660 // If immediate offset is omitted, default to +0.
1661 Binary |= 1 << ARMII::U_BitShift;
1667 ARMCodeEmitter::emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI) {
1668 const TargetInstrDesc &TID = MI.getDesc();
1669 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1671 // Part of binary is determined by TableGn.
1672 unsigned Binary = getBinaryCodeForInstr(MI);
1674 // Set the conditional execution predicate
1675 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1677 // Skip operand 0 of an instruction with base register update.
1682 // Set base address operand
1683 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1685 // Set addressing mode by modifying bits U(23) and P(24)
1686 ARM_AM::AMSubMode Mode = ARM_AM::getLoadStoreMultipleSubMode(MI.getOpcode());
1687 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(Mode));
1691 Binary |= 0x1 << ARMII::W_BitShift;
1693 // First register is encoded in Dd.
1694 Binary |= encodeVFPRd(MI, OpIdx+2);
1696 // Count the number of registers.
1697 unsigned NumRegs = 1;
1698 for (unsigned i = OpIdx+3, e = MI.getNumOperands(); i != e; ++i) {
1699 const MachineOperand &MO = MI.getOperand(i);
1700 if (!MO.isReg() || MO.isImplicit())
1704 // Bit 8 will be set if <list> is consecutive 64-bit registers (e.g., D0)
1705 // Otherwise, it will be 0, in the case of 32-bit registers.
1707 Binary |= NumRegs * 2;
1714 static unsigned encodeNEONRd(const MachineInstr &MI, unsigned OpIdx) {
1715 unsigned RegD = MI.getOperand(OpIdx).getReg();
1716 unsigned Binary = 0;
1717 RegD = getARMRegisterNumbering(RegD);
1718 Binary |= (RegD & 0xf) << ARMII::RegRdShift;
1719 Binary |= ((RegD >> 4) & 1) << ARMII::D_BitShift;
1723 static unsigned encodeNEONRn(const MachineInstr &MI, unsigned OpIdx) {
1724 unsigned RegN = MI.getOperand(OpIdx).getReg();
1725 unsigned Binary = 0;
1726 RegN = getARMRegisterNumbering(RegN);
1727 Binary |= (RegN & 0xf) << ARMII::RegRnShift;
1728 Binary |= ((RegN >> 4) & 1) << ARMII::N_BitShift;
1732 static unsigned encodeNEONRm(const MachineInstr &MI, unsigned OpIdx) {
1733 unsigned RegM = MI.getOperand(OpIdx).getReg();
1734 unsigned Binary = 0;
1735 RegM = getARMRegisterNumbering(RegM);
1736 Binary |= (RegM & 0xf);
1737 Binary |= ((RegM >> 4) & 1) << ARMII::M_BitShift;
1741 /// convertNEONDataProcToThumb - Convert the ARM mode encoding for a NEON
1742 /// data-processing instruction to the corresponding Thumb encoding.
1743 static unsigned convertNEONDataProcToThumb(unsigned Binary) {
1744 assert((Binary & 0xfe000000) == 0xf2000000 &&
1745 "not an ARM NEON data-processing instruction");
1746 unsigned UBit = (Binary >> 24) & 1;
1747 return 0xef000000 | (UBit << 28) | (Binary & 0xffffff);
1750 void ARMCodeEmitter::emitNEONLaneInstruction(const MachineInstr &MI) {
1751 unsigned Binary = getBinaryCodeForInstr(MI);
1753 unsigned RegTOpIdx, RegNOpIdx, LnOpIdx;
1754 const TargetInstrDesc &TID = MI.getDesc();
1755 if ((TID.TSFlags & ARMII::FormMask) == ARMII::NGetLnFrm) {
1759 } else { // ARMII::NSetLnFrm
1765 // Set the conditional execution predicate
1766 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1768 unsigned RegT = MI.getOperand(RegTOpIdx).getReg();
1769 RegT = getARMRegisterNumbering(RegT);
1770 Binary |= (RegT << ARMII::RegRdShift);
1771 Binary |= encodeNEONRn(MI, RegNOpIdx);
1774 if ((Binary & (1 << 22)) != 0)
1775 LaneShift = 0; // 8-bit elements
1776 else if ((Binary & (1 << 5)) != 0)
1777 LaneShift = 1; // 16-bit elements
1779 LaneShift = 2; // 32-bit elements
1781 unsigned Lane = MI.getOperand(LnOpIdx).getImm() << LaneShift;
1782 unsigned Opc1 = Lane >> 2;
1783 unsigned Opc2 = Lane & 3;
1784 assert((Opc1 & 3) == 0 && "out-of-range lane number operand");
1785 Binary |= (Opc1 << 21);
1786 Binary |= (Opc2 << 5);
1791 void ARMCodeEmitter::emitNEONDupInstruction(const MachineInstr &MI) {
1792 unsigned Binary = getBinaryCodeForInstr(MI);
1794 // Set the conditional execution predicate
1795 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1797 unsigned RegT = MI.getOperand(1).getReg();
1798 RegT = getARMRegisterNumbering(RegT);
1799 Binary |= (RegT << ARMII::RegRdShift);
1800 Binary |= encodeNEONRn(MI, 0);
1804 void ARMCodeEmitter::emitNEON1RegModImmInstruction(const MachineInstr &MI) {
1805 unsigned Binary = getBinaryCodeForInstr(MI);
1806 // Destination register is encoded in Dd.
1807 Binary |= encodeNEONRd(MI, 0);
1808 // Immediate fields: Op, Cmode, I, Imm3, Imm4
1809 unsigned Imm = MI.getOperand(1).getImm();
1810 unsigned Op = (Imm >> 12) & 1;
1811 unsigned Cmode = (Imm >> 8) & 0xf;
1812 unsigned I = (Imm >> 7) & 1;
1813 unsigned Imm3 = (Imm >> 4) & 0x7;
1814 unsigned Imm4 = Imm & 0xf;
1815 Binary |= (I << 24) | (Imm3 << 16) | (Cmode << 8) | (Op << 5) | Imm4;
1817 Binary = convertNEONDataProcToThumb(Binary);
1821 void ARMCodeEmitter::emitNEON2RegInstruction(const MachineInstr &MI) {
1822 const TargetInstrDesc &TID = MI.getDesc();
1823 unsigned Binary = getBinaryCodeForInstr(MI);
1824 // Destination register is encoded in Dd; source register in Dm.
1826 Binary |= encodeNEONRd(MI, OpIdx++);
1827 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1829 Binary |= encodeNEONRm(MI, OpIdx);
1831 Binary = convertNEONDataProcToThumb(Binary);
1832 // FIXME: This does not handle VDUPfdf or VDUPfqf.
1836 void ARMCodeEmitter::emitNEON3RegInstruction(const MachineInstr &MI) {
1837 const TargetInstrDesc &TID = MI.getDesc();
1838 unsigned Binary = getBinaryCodeForInstr(MI);
1839 // Destination register is encoded in Dd; source registers in Dn and Dm.
1841 Binary |= encodeNEONRd(MI, OpIdx++);
1842 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1844 Binary |= encodeNEONRn(MI, OpIdx++);
1845 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1847 Binary |= encodeNEONRm(MI, OpIdx);
1849 Binary = convertNEONDataProcToThumb(Binary);
1850 // FIXME: This does not handle VMOVDneon or VMOVQ.
1854 #include "ARMGenCodeEmitter.inc"