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 getThumbBLTargetOpValue(const MachineInstr &MI, unsigned Op)
176 unsigned getThumbBLXTargetOpValue(const MachineInstr &MI, unsigned Op)
178 unsigned getThumbBRTargetOpValue(const MachineInstr &MI, unsigned Op)
180 unsigned getThumbBCCTargetOpValue(const MachineInstr &MI, unsigned Op)
182 unsigned getThumbCBTargetOpValue(const MachineInstr &MI, unsigned Op)
184 unsigned getBranchTargetOpValue(const MachineInstr &MI, unsigned Op)
186 unsigned getUnconditionalBranchTargetOpValue(const MachineInstr &MI,
187 unsigned Op) const { return 0; }
188 unsigned getCCOutOpValue(const MachineInstr &MI, unsigned Op)
190 unsigned getSOImmOpValue(const MachineInstr &MI, unsigned Op)
192 unsigned getT2SOImmOpValue(const MachineInstr &MI, unsigned Op)
194 unsigned getSORegOpValue(const MachineInstr &MI, unsigned Op)
196 unsigned getThumbAddrModeRegRegOpValue(const MachineInstr &MI, unsigned Op)
198 unsigned getT2AddrModeImm12OpValue(const MachineInstr &MI, unsigned Op)
200 unsigned getT2AddrModeImm8OpValue(const MachineInstr &MI, unsigned Op)
202 unsigned getT2AddrModeImm8s4OpValue(const MachineInstr &MI, unsigned Op)
204 unsigned getT2AddrModeImm8OffsetOpValue(const MachineInstr &MI, unsigned Op)
206 unsigned getT2AddrModeImm12OffsetOpValue(const MachineInstr &MI,unsigned Op)
208 unsigned getT2AddrModeSORegOpValue(const MachineInstr &MI, unsigned Op)
210 unsigned getT2SORegOpValue(const MachineInstr &MI, unsigned Op)
212 unsigned getRotImmOpValue(const MachineInstr &MI, unsigned Op)
214 unsigned getImmMinusOneOpValue(const MachineInstr &MI, unsigned Op)
216 unsigned getT2AdrLabelOpValue(const MachineInstr &MI, unsigned Op)
218 unsigned getAddrMode6AddressOpValue(const MachineInstr &MI, unsigned Op)
220 unsigned getAddrMode6DupAddressOpValue(const MachineInstr &MI, unsigned Op)
222 unsigned getAddrMode6OffsetOpValue(const MachineInstr &MI, unsigned Op)
224 unsigned getBitfieldInvertedMaskOpValue(const MachineInstr &MI,
225 unsigned Op) const { return 0; }
226 uint32_t getLdStmModeOpValue(const MachineInstr &MI, unsigned OpIdx)
228 uint32_t getLdStSORegOpValue(const MachineInstr &MI, unsigned OpIdx)
231 unsigned getAddrModeImm12OpValue(const MachineInstr &MI, unsigned Op)
234 // {12} = (U)nsigned (add == '1', sub == '0')
236 const MachineOperand &MO = MI.getOperand(Op);
237 const MachineOperand &MO1 = MI.getOperand(Op + 1);
239 emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry);
242 unsigned Reg = getARMRegisterNumbering(MO.getReg());
243 int32_t Imm12 = MO1.getImm();
245 Binary = Imm12 & 0xfff;
248 Binary |= (Reg << 13);
252 unsigned getMovtImmOpValue(const MachineInstr &MI, unsigned Op) const {
256 uint32_t getAddrMode2OpValue(const MachineInstr &MI, unsigned OpIdx)
258 uint32_t getAddrMode2OffsetOpValue(const MachineInstr &MI, unsigned OpIdx)
260 uint32_t getAddrMode3OffsetOpValue(const MachineInstr &MI, unsigned OpIdx)
262 uint32_t getAddrMode3OpValue(const MachineInstr &MI, unsigned Op)
264 uint32_t getAddrModeThumbSPOpValue(const MachineInstr &MI, unsigned Op)
266 uint32_t getAddrModeSOpValue(const MachineInstr &MI, unsigned Op)
268 uint32_t getAddrModeISOpValue(const MachineInstr &MI, unsigned Op)
270 uint32_t getAddrModePCOpValue(const MachineInstr &MI, unsigned Op)
272 uint32_t getAddrMode5OpValue(const MachineInstr &MI, unsigned Op) const {
274 // {12} = (U)nsigned (add == '1', sub == '0')
276 const MachineOperand &MO = MI.getOperand(Op);
277 const MachineOperand &MO1 = MI.getOperand(Op + 1);
279 emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry);
282 unsigned Reg = getARMRegisterNumbering(MO.getReg());
283 int32_t Imm12 = MO1.getImm();
285 // Special value for #-0
286 if (Imm12 == INT32_MIN)
289 // Immediate is always encoded as positive. The 'U' bit controls add vs
297 uint32_t Binary = Imm12 & 0xfff;
300 Binary |= (Reg << 13);
303 unsigned getNEONVcvtImm32OpValue(const MachineInstr &MI, unsigned Op)
306 unsigned getRegisterListOpValue(const MachineInstr &MI, unsigned Op)
309 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
310 /// machine operand requires relocation, record the relocation and return
312 unsigned getMovi32Value(const MachineInstr &MI,const MachineOperand &MO,
315 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
317 unsigned getShiftOp(unsigned Imm) const ;
319 /// Routines that handle operands which add machine relocations which are
320 /// fixed up by the relocation stage.
321 void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
322 bool MayNeedFarStub, bool Indirect,
323 intptr_t ACPV = 0) const;
324 void emitExternalSymbolAddress(const char *ES, unsigned Reloc) const;
325 void emitConstPoolAddress(unsigned CPI, unsigned Reloc) const;
326 void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const;
327 void emitMachineBasicBlock(MachineBasicBlock *BB, unsigned Reloc,
328 intptr_t JTBase = 0) const;
332 char ARMCodeEmitter::ID = 0;
334 /// createARMJITCodeEmitterPass - Return a pass that emits the collected ARM
335 /// code to the specified MCE object.
336 FunctionPass *llvm::createARMJITCodeEmitterPass(ARMBaseTargetMachine &TM,
337 JITCodeEmitter &JCE) {
338 return new ARMCodeEmitter(TM, JCE);
341 bool ARMCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
342 assert((MF.getTarget().getRelocationModel() != Reloc::Default ||
343 MF.getTarget().getRelocationModel() != Reloc::Static) &&
344 "JIT relocation model must be set to static or default!");
345 JTI = ((ARMTargetMachine &)MF.getTarget()).getJITInfo();
346 II = ((const ARMTargetMachine &)MF.getTarget()).getInstrInfo();
347 TD = ((const ARMTargetMachine &)MF.getTarget()).getTargetData();
348 Subtarget = &TM.getSubtarget<ARMSubtarget>();
349 MCPEs = &MF.getConstantPool()->getConstants();
351 if (MF.getJumpTableInfo()) MJTEs = &MF.getJumpTableInfo()->getJumpTables();
352 IsPIC = TM.getRelocationModel() == Reloc::PIC_;
353 IsThumb = MF.getInfo<ARMFunctionInfo>()->isThumbFunction();
354 JTI->Initialize(MF, IsPIC);
355 MMI = &getAnalysis<MachineModuleInfo>();
356 MCE.setModuleInfo(MMI);
359 DEBUG(errs() << "JITTing function '"
360 << MF.getFunction()->getName() << "'\n");
361 MCE.startFunction(MF);
362 for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
364 MCE.StartMachineBasicBlock(MBB);
365 for (MachineBasicBlock::const_iterator I = MBB->begin(), E = MBB->end();
369 } while (MCE.finishFunction(MF));
374 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
376 unsigned ARMCodeEmitter::getShiftOp(unsigned Imm) const {
377 switch (ARM_AM::getAM2ShiftOpc(Imm)) {
378 default: llvm_unreachable("Unknown shift opc!");
379 case ARM_AM::asr: return 2;
380 case ARM_AM::lsl: return 0;
381 case ARM_AM::lsr: return 1;
383 case ARM_AM::rrx: return 3;
388 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
389 /// machine operand requires relocation, record the relocation and return zero.
390 unsigned ARMCodeEmitter::getMovi32Value(const MachineInstr &MI,
391 const MachineOperand &MO,
393 assert(((Reloc == ARM::reloc_arm_movt) || (Reloc == ARM::reloc_arm_movw))
394 && "Relocation to this function should be for movt or movw");
397 return static_cast<unsigned>(MO.getImm());
398 else if (MO.isGlobal())
399 emitGlobalAddress(MO.getGlobal(), Reloc, true, false);
400 else if (MO.isSymbol())
401 emitExternalSymbolAddress(MO.getSymbolName(), Reloc);
403 emitMachineBasicBlock(MO.getMBB(), Reloc);
408 llvm_unreachable("Unsupported operand type for movw/movt");
413 /// getMachineOpValue - Return binary encoding of operand. If the machine
414 /// operand requires relocation, record the relocation and return zero.
415 unsigned ARMCodeEmitter::getMachineOpValue(const MachineInstr &MI,
416 const MachineOperand &MO) const {
418 return getARMRegisterNumbering(MO.getReg());
420 return static_cast<unsigned>(MO.getImm());
421 else if (MO.isGlobal())
422 emitGlobalAddress(MO.getGlobal(), ARM::reloc_arm_branch, true, false);
423 else if (MO.isSymbol())
424 emitExternalSymbolAddress(MO.getSymbolName(), ARM::reloc_arm_branch);
425 else if (MO.isCPI()) {
426 const TargetInstrDesc &TID = MI.getDesc();
427 // For VFP load, the immediate offset is multiplied by 4.
428 unsigned Reloc = ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPLdStFrm)
429 ? ARM::reloc_arm_vfp_cp_entry : ARM::reloc_arm_cp_entry;
430 emitConstPoolAddress(MO.getIndex(), Reloc);
431 } else if (MO.isJTI())
432 emitJumpTableAddress(MO.getIndex(), ARM::reloc_arm_relative);
434 emitMachineBasicBlock(MO.getMBB(), ARM::reloc_arm_branch);
436 llvm_unreachable("Unable to encode MachineOperand!");
440 /// emitGlobalAddress - Emit the specified address to the code stream.
442 void ARMCodeEmitter::emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
443 bool MayNeedFarStub, bool Indirect,
444 intptr_t ACPV) const {
445 MachineRelocation MR = Indirect
446 ? MachineRelocation::getIndirectSymbol(MCE.getCurrentPCOffset(), Reloc,
447 const_cast<GlobalValue *>(GV),
448 ACPV, MayNeedFarStub)
449 : MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc,
450 const_cast<GlobalValue *>(GV), ACPV,
452 MCE.addRelocation(MR);
455 /// emitExternalSymbolAddress - Arrange for the address of an external symbol to
456 /// be emitted to the current location in the function, and allow it to be PC
458 void ARMCodeEmitter::
459 emitExternalSymbolAddress(const char *ES, unsigned Reloc) const {
460 MCE.addRelocation(MachineRelocation::getExtSym(MCE.getCurrentPCOffset(),
464 /// emitConstPoolAddress - Arrange for the address of an constant pool
465 /// to be emitted to the current location in the function, and allow it to be PC
467 void ARMCodeEmitter::emitConstPoolAddress(unsigned CPI, unsigned Reloc) const {
468 // Tell JIT emitter we'll resolve the address.
469 MCE.addRelocation(MachineRelocation::getConstPool(MCE.getCurrentPCOffset(),
470 Reloc, CPI, 0, true));
473 /// emitJumpTableAddress - Arrange for the address of a jump table to
474 /// be emitted to the current location in the function, and allow it to be PC
476 void ARMCodeEmitter::
477 emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const {
478 MCE.addRelocation(MachineRelocation::getJumpTable(MCE.getCurrentPCOffset(),
479 Reloc, JTIndex, 0, true));
482 /// emitMachineBasicBlock - Emit the specified address basic block.
483 void ARMCodeEmitter::emitMachineBasicBlock(MachineBasicBlock *BB,
485 intptr_t JTBase) const {
486 MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(),
490 void ARMCodeEmitter::emitWordLE(unsigned Binary) {
491 DEBUG(errs() << " 0x";
492 errs().write_hex(Binary) << "\n");
493 MCE.emitWordLE(Binary);
496 void ARMCodeEmitter::emitDWordLE(uint64_t Binary) {
497 DEBUG(errs() << " 0x";
498 errs().write_hex(Binary) << "\n");
499 MCE.emitDWordLE(Binary);
502 void ARMCodeEmitter::emitInstruction(const MachineInstr &MI) {
503 DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << MI);
505 MCE.processDebugLoc(MI.getDebugLoc(), true);
507 ++NumEmitted; // Keep track of the # of mi's emitted
508 switch (MI.getDesc().TSFlags & ARMII::FormMask) {
510 llvm_unreachable("Unhandled instruction encoding format!");
514 if (MI.getOpcode() == ARM::LEApcrelJT) {
515 // Materialize jumptable address.
516 emitLEApcrelJTInstruction(MI);
519 llvm_unreachable("Unhandled instruction encoding!");
522 emitPseudoInstruction(MI);
525 case ARMII::DPSoRegFrm:
526 emitDataProcessingInstruction(MI);
530 emitLoadStoreInstruction(MI);
532 case ARMII::LdMiscFrm:
533 case ARMII::StMiscFrm:
534 emitMiscLoadStoreInstruction(MI);
536 case ARMII::LdStMulFrm:
537 emitLoadStoreMultipleInstruction(MI);
540 emitMulFrmInstruction(MI);
543 emitExtendInstruction(MI);
545 case ARMII::ArithMiscFrm:
546 emitMiscArithInstruction(MI);
549 emitSaturateInstruction(MI);
552 emitBranchInstruction(MI);
554 case ARMII::BrMiscFrm:
555 emitMiscBranchInstruction(MI);
558 case ARMII::VFPUnaryFrm:
559 case ARMII::VFPBinaryFrm:
560 emitVFPArithInstruction(MI);
562 case ARMII::VFPConv1Frm:
563 case ARMII::VFPConv2Frm:
564 case ARMII::VFPConv3Frm:
565 case ARMII::VFPConv4Frm:
566 case ARMII::VFPConv5Frm:
567 emitVFPConversionInstruction(MI);
569 case ARMII::VFPLdStFrm:
570 emitVFPLoadStoreInstruction(MI);
572 case ARMII::VFPLdStMulFrm:
573 emitVFPLoadStoreMultipleInstruction(MI);
576 // NEON instructions.
577 case ARMII::NGetLnFrm:
578 case ARMII::NSetLnFrm:
579 emitNEONLaneInstruction(MI);
582 emitNEONDupInstruction(MI);
584 case ARMII::N1RegModImmFrm:
585 emitNEON1RegModImmInstruction(MI);
587 case ARMII::N2RegFrm:
588 emitNEON2RegInstruction(MI);
590 case ARMII::N3RegFrm:
591 emitNEON3RegInstruction(MI);
594 MCE.processDebugLoc(MI.getDebugLoc(), false);
597 void ARMCodeEmitter::emitConstPoolInstruction(const MachineInstr &MI) {
598 unsigned CPI = MI.getOperand(0).getImm(); // CP instruction index.
599 unsigned CPIndex = MI.getOperand(1).getIndex(); // Actual cp entry index.
600 const MachineConstantPoolEntry &MCPE = (*MCPEs)[CPIndex];
602 // Remember the CONSTPOOL_ENTRY address for later relocation.
603 JTI->addConstantPoolEntryAddr(CPI, MCE.getCurrentPCValue());
605 // Emit constpool island entry. In most cases, the actual values will be
606 // resolved and relocated after code emission.
607 if (MCPE.isMachineConstantPoolEntry()) {
608 ARMConstantPoolValue *ACPV =
609 static_cast<ARMConstantPoolValue*>(MCPE.Val.MachineCPVal);
611 DEBUG(errs() << " ** ARM constant pool #" << CPI << " @ "
612 << (void*)MCE.getCurrentPCValue() << " " << *ACPV << '\n');
614 assert(ACPV->isGlobalValue() && "unsupported constant pool value");
615 const GlobalValue *GV = ACPV->getGV();
617 Reloc::Model RelocM = TM.getRelocationModel();
618 emitGlobalAddress(GV, ARM::reloc_arm_machine_cp_entry,
620 Subtarget->GVIsIndirectSymbol(GV, RelocM),
623 emitExternalSymbolAddress(ACPV->getSymbol(), ARM::reloc_arm_absolute);
627 const Constant *CV = MCPE.Val.ConstVal;
630 errs() << " ** Constant pool #" << CPI << " @ "
631 << (void*)MCE.getCurrentPCValue() << " ";
632 if (const Function *F = dyn_cast<Function>(CV))
633 errs() << F->getName();
639 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
640 emitGlobalAddress(GV, ARM::reloc_arm_absolute, isa<Function>(GV), false);
642 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
643 uint32_t Val = uint32_t(*CI->getValue().getRawData());
645 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
646 if (CFP->getType()->isFloatTy())
647 emitWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
648 else if (CFP->getType()->isDoubleTy())
649 emitDWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
651 llvm_unreachable("Unable to handle this constantpool entry!");
654 llvm_unreachable("Unable to handle this constantpool entry!");
659 void ARMCodeEmitter::emitMOVi32immInstruction(const MachineInstr &MI) {
660 const MachineOperand &MO0 = MI.getOperand(0);
661 const MachineOperand &MO1 = MI.getOperand(1);
663 // Emit the 'movw' instruction.
664 unsigned Binary = 0x30 << 20; // mov: Insts{27-20} = 0b00110000
666 unsigned Lo16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movw) & 0xFFFF;
668 // Set the conditional execution predicate.
669 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
672 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
674 // Encode imm16 as imm4:imm12
675 Binary |= Lo16 & 0xFFF; // Insts{11-0} = imm12
676 Binary |= ((Lo16 >> 12) & 0xF) << 16; // Insts{19-16} = imm4
679 unsigned Hi16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movt) >> 16;
680 // Emit the 'movt' instruction.
681 Binary = 0x34 << 20; // movt: Insts{27-20} = 0b00110100
683 // Set the conditional execution predicate.
684 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
687 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
689 // Encode imm16 as imm4:imm1, same as movw above.
690 Binary |= Hi16 & 0xFFF;
691 Binary |= ((Hi16 >> 12) & 0xF) << 16;
695 void ARMCodeEmitter::emitMOVi2piecesInstruction(const MachineInstr &MI) {
696 const MachineOperand &MO0 = MI.getOperand(0);
697 const MachineOperand &MO1 = MI.getOperand(1);
698 assert(MO1.isImm() && ARM_AM::isSOImmTwoPartVal(MO1.getImm()) &&
699 "Not a valid so_imm value!");
700 unsigned V1 = ARM_AM::getSOImmTwoPartFirst(MO1.getImm());
701 unsigned V2 = ARM_AM::getSOImmTwoPartSecond(MO1.getImm());
703 // Emit the 'mov' instruction.
704 unsigned Binary = 0xd << 21; // mov: Insts{24-21} = 0b1101
706 // Set the conditional execution predicate.
707 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
710 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
713 // Set bit I(25) to identify this is the immediate form of <shifter_op>
714 Binary |= 1 << ARMII::I_BitShift;
715 Binary |= getMachineSoImmOpValue(V1);
718 // Now the 'orr' instruction.
719 Binary = 0xc << 21; // orr: Insts{24-21} = 0b1100
721 // Set the conditional execution predicate.
722 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
725 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
728 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRnShift;
731 // Set bit I(25) to identify this is the immediate form of <shifter_op>
732 Binary |= 1 << ARMII::I_BitShift;
733 Binary |= getMachineSoImmOpValue(V2);
737 void ARMCodeEmitter::emitLEApcrelJTInstruction(const MachineInstr &MI) {
738 // It's basically add r, pc, (LJTI - $+8)
740 const TargetInstrDesc &TID = MI.getDesc();
742 // Emit the 'add' instruction.
743 unsigned Binary = 0x4 << 21; // add: Insts{24-21} = 0b0100
745 // Set the conditional execution predicate
746 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
748 // Encode S bit if MI modifies CPSR.
749 Binary |= getAddrModeSBit(MI, TID);
752 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
754 // Encode Rn which is PC.
755 Binary |= getARMRegisterNumbering(ARM::PC) << ARMII::RegRnShift;
757 // Encode the displacement.
758 Binary |= 1 << ARMII::I_BitShift;
759 emitJumpTableAddress(MI.getOperand(1).getIndex(), ARM::reloc_arm_jt_base);
764 void ARMCodeEmitter::emitPseudoMoveInstruction(const MachineInstr &MI) {
765 unsigned Opcode = MI.getDesc().Opcode;
767 // Part of binary is determined by TableGn.
768 unsigned Binary = getBinaryCodeForInstr(MI);
770 // Set the conditional execution predicate
771 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
773 // Encode S bit if MI modifies CPSR.
774 if (Opcode == ARM::MOVsrl_flag || Opcode == ARM::MOVsra_flag)
775 Binary |= 1 << ARMII::S_BitShift;
777 // Encode register def if there is one.
778 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
780 // Encode the shift operation.
787 case ARM::MOVsrl_flag:
789 Binary |= (0x2 << 4) | (1 << 7);
791 case ARM::MOVsra_flag:
793 Binary |= (0x4 << 4) | (1 << 7);
797 // Encode register Rm.
798 Binary |= getMachineOpValue(MI, 1);
803 void ARMCodeEmitter::addPCLabel(unsigned LabelID) {
804 DEBUG(errs() << " ** LPC" << LabelID << " @ "
805 << (void*)MCE.getCurrentPCValue() << '\n');
806 JTI->addPCLabelAddr(LabelID, MCE.getCurrentPCValue());
809 void ARMCodeEmitter::emitPseudoInstruction(const MachineInstr &MI) {
810 unsigned Opcode = MI.getDesc().Opcode;
813 llvm_unreachable("ARMCodeEmitter::emitPseudoInstruction");
815 case ARM::BMOVPCRX_CALL:
817 case ARM::BMOVPCRXr9_CALL: {
818 // First emit mov lr, pc
819 unsigned Binary = 0x01a0e00f;
820 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
823 // and then emit the branch.
824 emitMiscBranchInstruction(MI);
827 case TargetOpcode::INLINEASM: {
828 // We allow inline assembler nodes with empty bodies - they can
829 // implicitly define registers, which is ok for JIT.
830 if (MI.getOperand(0).getSymbolName()[0]) {
831 report_fatal_error("JIT does not support inline asm!");
835 case TargetOpcode::PROLOG_LABEL:
836 case TargetOpcode::EH_LABEL:
837 MCE.emitLabel(MI.getOperand(0).getMCSymbol());
839 case TargetOpcode::IMPLICIT_DEF:
840 case TargetOpcode::KILL:
843 case ARM::CONSTPOOL_ENTRY:
844 emitConstPoolInstruction(MI);
847 // Remember of the address of the PC label for relocation later.
848 addPCLabel(MI.getOperand(2).getImm());
849 // PICADD is just an add instruction that implicitly read pc.
850 emitDataProcessingInstruction(MI, 0, ARM::PC);
857 // Remember of the address of the PC label for relocation later.
858 addPCLabel(MI.getOperand(2).getImm());
859 // These are just load / store instructions that implicitly read pc.
860 emitLoadStoreInstruction(MI, 0, ARM::PC);
867 // Remember of the address of the PC label for relocation later.
868 addPCLabel(MI.getOperand(2).getImm());
869 // These are just load / store instructions that implicitly read pc.
870 emitMiscLoadStoreInstruction(MI, ARM::PC);
875 // Two instructions to materialize a constant.
876 if (Subtarget->hasV6T2Ops())
877 emitMOVi32immInstruction(MI);
879 emitMOVi2piecesInstruction(MI);
882 case ARM::LEApcrelJT:
883 // Materialize jumptable address.
884 emitLEApcrelJTInstruction(MI);
887 case ARM::MOVsrl_flag:
888 case ARM::MOVsra_flag:
889 emitPseudoMoveInstruction(MI);
894 unsigned ARMCodeEmitter::getMachineSoRegOpValue(const MachineInstr &MI,
895 const TargetInstrDesc &TID,
896 const MachineOperand &MO,
898 unsigned Binary = getMachineOpValue(MI, MO);
900 const MachineOperand &MO1 = MI.getOperand(OpIdx + 1);
901 const MachineOperand &MO2 = MI.getOperand(OpIdx + 2);
902 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO2.getImm());
904 // Encode the shift opcode.
906 unsigned Rs = MO1.getReg();
908 // Set shift operand (bit[7:4]).
913 // RRX - 0110 and bit[11:8] clear.
915 default: llvm_unreachable("Unknown shift opc!");
916 case ARM_AM::lsl: SBits = 0x1; break;
917 case ARM_AM::lsr: SBits = 0x3; break;
918 case ARM_AM::asr: SBits = 0x5; break;
919 case ARM_AM::ror: SBits = 0x7; break;
920 case ARM_AM::rrx: SBits = 0x6; break;
923 // Set shift operand (bit[6:4]).
929 default: llvm_unreachable("Unknown shift opc!");
930 case ARM_AM::lsl: SBits = 0x0; break;
931 case ARM_AM::lsr: SBits = 0x2; break;
932 case ARM_AM::asr: SBits = 0x4; break;
933 case ARM_AM::ror: SBits = 0x6; break;
936 Binary |= SBits << 4;
937 if (SOpc == ARM_AM::rrx)
940 // Encode the shift operation Rs or shift_imm (except rrx).
942 // Encode Rs bit[11:8].
943 assert(ARM_AM::getSORegOffset(MO2.getImm()) == 0);
944 return Binary | (getARMRegisterNumbering(Rs) << ARMII::RegRsShift);
947 // Encode shift_imm bit[11:7].
948 return Binary | ARM_AM::getSORegOffset(MO2.getImm()) << 7;
951 unsigned ARMCodeEmitter::getMachineSoImmOpValue(unsigned SoImm) {
952 int SoImmVal = ARM_AM::getSOImmVal(SoImm);
953 assert(SoImmVal != -1 && "Not a valid so_imm value!");
955 // Encode rotate_imm.
956 unsigned Binary = (ARM_AM::getSOImmValRot((unsigned)SoImmVal) >> 1)
957 << ARMII::SoRotImmShift;
960 Binary |= ARM_AM::getSOImmValImm((unsigned)SoImmVal);
964 unsigned ARMCodeEmitter::getAddrModeSBit(const MachineInstr &MI,
965 const TargetInstrDesc &TID) const {
966 for (unsigned i = MI.getNumOperands(), e = TID.getNumOperands(); i != e; --i){
967 const MachineOperand &MO = MI.getOperand(i-1);
968 if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR)
969 return 1 << ARMII::S_BitShift;
974 void ARMCodeEmitter::emitDataProcessingInstruction(const MachineInstr &MI,
976 unsigned ImplicitRn) {
977 const TargetInstrDesc &TID = MI.getDesc();
979 // Part of binary is determined by TableGn.
980 unsigned Binary = getBinaryCodeForInstr(MI);
982 // Set the conditional execution predicate
983 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
985 // Encode S bit if MI modifies CPSR.
986 Binary |= getAddrModeSBit(MI, TID);
988 // Encode register def if there is one.
989 unsigned NumDefs = TID.getNumDefs();
992 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
994 // Special handling for implicit use (e.g. PC).
995 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
997 if (TID.Opcode == ARM::MOVi16) {
998 // Get immediate from MI.
999 unsigned Lo16 = getMovi32Value(MI, MI.getOperand(OpIdx),
1000 ARM::reloc_arm_movw);
1001 // Encode imm which is the same as in emitMOVi32immInstruction().
1002 Binary |= Lo16 & 0xFFF;
1003 Binary |= ((Lo16 >> 12) & 0xF) << 16;
1006 } else if(TID.Opcode == ARM::MOVTi16) {
1007 unsigned Hi16 = (getMovi32Value(MI, MI.getOperand(OpIdx),
1008 ARM::reloc_arm_movt) >> 16);
1009 Binary |= Hi16 & 0xFFF;
1010 Binary |= ((Hi16 >> 12) & 0xF) << 16;
1013 } else if ((TID.Opcode == ARM::BFC) || (TID.Opcode == ARM::BFI)) {
1014 uint32_t v = ~MI.getOperand(2).getImm();
1015 int32_t lsb = CountTrailingZeros_32(v);
1016 int32_t msb = (32 - CountLeadingZeros_32(v)) - 1;
1017 // Instr{20-16} = msb, Instr{11-7} = lsb
1018 Binary |= (msb & 0x1F) << 16;
1019 Binary |= (lsb & 0x1F) << 7;
1022 } else if ((TID.Opcode == ARM::UBFX) || (TID.Opcode == ARM::SBFX)) {
1023 // Encode Rn in Instr{0-3}
1024 Binary |= getMachineOpValue(MI, OpIdx++);
1026 uint32_t lsb = MI.getOperand(OpIdx++).getImm();
1027 uint32_t widthm1 = MI.getOperand(OpIdx++).getImm() - 1;
1029 // Instr{20-16} = widthm1, Instr{11-7} = lsb
1030 Binary |= (widthm1 & 0x1F) << 16;
1031 Binary |= (lsb & 0x1F) << 7;
1036 // If this is a two-address operand, skip it. e.g. MOVCCr operand 1.
1037 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1040 // Encode first non-shifter register operand if there is one.
1041 bool isUnary = TID.TSFlags & ARMII::UnaryDP;
1044 // Special handling for implicit use (e.g. PC).
1045 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1047 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRnShift;
1052 // Encode shifter operand.
1053 const MachineOperand &MO = MI.getOperand(OpIdx);
1054 if ((TID.TSFlags & ARMII::FormMask) == ARMII::DPSoRegFrm) {
1056 emitWordLE(Binary | getMachineSoRegOpValue(MI, TID, MO, OpIdx));
1061 // Encode register Rm.
1062 emitWordLE(Binary | getARMRegisterNumbering(MO.getReg()));
1067 Binary |= getMachineSoImmOpValue((unsigned)MO.getImm());
1072 void ARMCodeEmitter::emitLoadStoreInstruction(const MachineInstr &MI,
1073 unsigned ImplicitRd,
1074 unsigned ImplicitRn) {
1075 const TargetInstrDesc &TID = MI.getDesc();
1076 unsigned Form = TID.TSFlags & ARMII::FormMask;
1077 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1079 // Part of binary is determined by TableGn.
1080 unsigned Binary = getBinaryCodeForInstr(MI);
1082 // If this is an LDRi12, STRi12 or LDRcp, nothing more needs be done.
1083 if (MI.getOpcode() == ARM::LDRi12 || MI.getOpcode() == ARM::LDRcp ||
1084 MI.getOpcode() == ARM::STRi12) {
1089 // Set the conditional execution predicate
1090 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1094 // Operand 0 of a pre- and post-indexed store is the address base
1095 // writeback. Skip it.
1096 bool Skipped = false;
1097 if (IsPrePost && Form == ARMII::StFrm) {
1102 // Set first operand
1104 // Special handling for implicit use (e.g. PC).
1105 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
1107 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1109 // Set second operand
1111 // Special handling for implicit use (e.g. PC).
1112 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1114 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1116 // If this is a two-address operand, skip it. e.g. LDR_PRE.
1117 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1120 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1121 unsigned AM2Opc = (ImplicitRn == ARM::PC)
1122 ? 0 : MI.getOperand(OpIdx+1).getImm();
1124 // Set bit U(23) according to sign of immed value (positive or negative).
1125 Binary |= ((ARM_AM::getAM2Op(AM2Opc) == ARM_AM::add ? 1 : 0) <<
1127 if (!MO2.getReg()) { // is immediate
1128 if (ARM_AM::getAM2Offset(AM2Opc))
1129 // Set the value of offset_12 field
1130 Binary |= ARM_AM::getAM2Offset(AM2Opc);
1135 // Set bit I(25), because this is not in immediate encoding.
1136 Binary |= 1 << ARMII::I_BitShift;
1137 assert(TargetRegisterInfo::isPhysicalRegister(MO2.getReg()));
1138 // Set bit[3:0] to the corresponding Rm register
1139 Binary |= getARMRegisterNumbering(MO2.getReg());
1141 // If this instr is in scaled register offset/index instruction, set
1142 // shift_immed(bit[11:7]) and shift(bit[6:5]) fields.
1143 if (unsigned ShImm = ARM_AM::getAM2Offset(AM2Opc)) {
1144 Binary |= getShiftOp(AM2Opc) << ARMII::ShiftImmShift; // shift
1145 Binary |= ShImm << ARMII::ShiftShift; // shift_immed
1151 void ARMCodeEmitter::emitMiscLoadStoreInstruction(const MachineInstr &MI,
1152 unsigned ImplicitRn) {
1153 const TargetInstrDesc &TID = MI.getDesc();
1154 unsigned Form = TID.TSFlags & ARMII::FormMask;
1155 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1157 // Part of binary is determined by TableGn.
1158 unsigned Binary = getBinaryCodeForInstr(MI);
1160 // Set the conditional execution predicate
1161 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1165 // Operand 0 of a pre- and post-indexed store is the address base
1166 // writeback. Skip it.
1167 bool Skipped = false;
1168 if (IsPrePost && Form == ARMII::StMiscFrm) {
1173 // Set first operand
1174 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1176 // Skip LDRD and STRD's second operand.
1177 if (TID.Opcode == ARM::LDRD || TID.Opcode == ARM::STRD)
1180 // Set second operand
1182 // Special handling for implicit use (e.g. PC).
1183 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1185 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1187 // If this is a two-address operand, skip it. e.g. LDRH_POST.
1188 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1191 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1192 unsigned AM3Opc = (ImplicitRn == ARM::PC)
1193 ? 0 : MI.getOperand(OpIdx+1).getImm();
1195 // Set bit U(23) according to sign of immed value (positive or negative)
1196 Binary |= ((ARM_AM::getAM3Op(AM3Opc) == ARM_AM::add ? 1 : 0) <<
1199 // If this instr is in register offset/index encoding, set bit[3:0]
1200 // to the corresponding Rm register.
1202 Binary |= getARMRegisterNumbering(MO2.getReg());
1207 // This instr is in immediate offset/index encoding, set bit 22 to 1.
1208 Binary |= 1 << ARMII::AM3_I_BitShift;
1209 if (unsigned ImmOffs = ARM_AM::getAM3Offset(AM3Opc)) {
1211 Binary |= (ImmOffs >> 4) << ARMII::ImmHiShift; // immedH
1212 Binary |= (ImmOffs & 0xF); // immedL
1218 static unsigned getAddrModeUPBits(unsigned Mode) {
1219 unsigned Binary = 0;
1221 // Set addressing mode by modifying bits U(23) and P(24)
1222 // IA - Increment after - bit U = 1 and bit P = 0
1223 // IB - Increment before - bit U = 1 and bit P = 1
1224 // DA - Decrement after - bit U = 0 and bit P = 0
1225 // DB - Decrement before - bit U = 0 and bit P = 1
1227 default: llvm_unreachable("Unknown addressing sub-mode!");
1228 case ARM_AM::da: break;
1229 case ARM_AM::db: Binary |= 0x1 << ARMII::P_BitShift; break;
1230 case ARM_AM::ia: Binary |= 0x1 << ARMII::U_BitShift; break;
1231 case ARM_AM::ib: Binary |= 0x3 << ARMII::U_BitShift; break;
1237 void ARMCodeEmitter::emitLoadStoreMultipleInstruction(const MachineInstr &MI) {
1238 const TargetInstrDesc &TID = MI.getDesc();
1239 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1241 // Part of binary is determined by TableGn.
1242 unsigned Binary = getBinaryCodeForInstr(MI);
1244 // Set the conditional execution predicate
1245 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1247 // Skip operand 0 of an instruction with base register update.
1252 // Set base address operand
1253 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1255 // Set addressing mode by modifying bits U(23) and P(24)
1256 ARM_AM::AMSubMode Mode = ARM_AM::getLoadStoreMultipleSubMode(MI.getOpcode());
1257 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(Mode));
1261 Binary |= 0x1 << ARMII::W_BitShift;
1264 for (unsigned i = OpIdx+2, e = MI.getNumOperands(); i != e; ++i) {
1265 const MachineOperand &MO = MI.getOperand(i);
1266 if (!MO.isReg() || MO.isImplicit())
1268 unsigned RegNum = getARMRegisterNumbering(MO.getReg());
1269 assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
1271 Binary |= 0x1 << RegNum;
1277 void ARMCodeEmitter::emitMulFrmInstruction(const MachineInstr &MI) {
1278 const TargetInstrDesc &TID = MI.getDesc();
1280 // Part of binary is determined by TableGn.
1281 unsigned Binary = getBinaryCodeForInstr(MI);
1283 // Set the conditional execution predicate
1284 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1286 // Encode S bit if MI modifies CPSR.
1287 Binary |= getAddrModeSBit(MI, TID);
1289 // 32x32->64bit operations have two destination registers. The number
1290 // of register definitions will tell us if that's what we're dealing with.
1292 if (TID.getNumDefs() == 2)
1293 Binary |= getMachineOpValue (MI, OpIdx++) << ARMII::RegRdLoShift;
1296 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdHiShift;
1299 Binary |= getMachineOpValue(MI, OpIdx++);
1302 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRsShift;
1304 // Many multiple instructions (e.g. MLA) have three src operands. Encode
1305 // it as Rn (for multiply, that's in the same offset as RdLo.
1306 if (TID.getNumOperands() > OpIdx &&
1307 !TID.OpInfo[OpIdx].isPredicate() &&
1308 !TID.OpInfo[OpIdx].isOptionalDef())
1309 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRdLoShift;
1314 void ARMCodeEmitter::emitExtendInstruction(const MachineInstr &MI) {
1315 const TargetInstrDesc &TID = MI.getDesc();
1317 // Part of binary is determined by TableGn.
1318 unsigned Binary = getBinaryCodeForInstr(MI);
1320 // Set the conditional execution predicate
1321 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1326 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1328 const MachineOperand &MO1 = MI.getOperand(OpIdx++);
1329 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1331 // Two register operand form.
1333 Binary |= getMachineOpValue(MI, MO1) << ARMII::RegRnShift;
1336 Binary |= getMachineOpValue(MI, MO2);
1339 Binary |= getMachineOpValue(MI, MO1);
1342 // Encode rot imm (0, 8, 16, or 24) if it has a rotate immediate operand.
1343 if (MI.getOperand(OpIdx).isImm() &&
1344 !TID.OpInfo[OpIdx].isPredicate() &&
1345 !TID.OpInfo[OpIdx].isOptionalDef())
1346 Binary |= (getMachineOpValue(MI, OpIdx) / 8) << ARMII::ExtRotImmShift;
1351 void ARMCodeEmitter::emitMiscArithInstruction(const MachineInstr &MI) {
1352 const TargetInstrDesc &TID = MI.getDesc();
1354 // Part of binary is determined by TableGn.
1355 unsigned Binary = getBinaryCodeForInstr(MI);
1357 // Set the conditional execution predicate
1358 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1363 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1365 const MachineOperand &MO = MI.getOperand(OpIdx++);
1366 if (OpIdx == TID.getNumOperands() ||
1367 TID.OpInfo[OpIdx].isPredicate() ||
1368 TID.OpInfo[OpIdx].isOptionalDef()) {
1369 // Encode Rm and it's done.
1370 Binary |= getMachineOpValue(MI, MO);
1376 Binary |= getMachineOpValue(MI, MO) << ARMII::RegRnShift;
1379 Binary |= getMachineOpValue(MI, OpIdx++);
1381 // Encode shift_imm.
1382 unsigned ShiftAmt = MI.getOperand(OpIdx).getImm();
1383 if (TID.Opcode == ARM::PKHTB) {
1384 assert(ShiftAmt != 0 && "PKHTB shift_imm is 0!");
1388 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1389 Binary |= ShiftAmt << ARMII::ShiftShift;
1394 void ARMCodeEmitter::emitSaturateInstruction(const MachineInstr &MI) {
1395 const TargetInstrDesc &TID = MI.getDesc();
1397 // Part of binary is determined by TableGen.
1398 unsigned Binary = getBinaryCodeForInstr(MI);
1400 // Set the conditional execution predicate
1401 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1404 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
1406 // Encode saturate bit position.
1407 unsigned Pos = MI.getOperand(1).getImm();
1408 if (TID.Opcode == ARM::SSAT || TID.Opcode == ARM::SSAT16)
1410 assert((Pos < 16 || (Pos < 32 &&
1411 TID.Opcode != ARM::SSAT16 &&
1412 TID.Opcode != ARM::USAT16)) &&
1413 "saturate bit position out of range");
1414 Binary |= Pos << 16;
1417 Binary |= getMachineOpValue(MI, 2);
1419 // Encode shift_imm.
1420 if (TID.getNumOperands() == 4) {
1421 unsigned ShiftOp = MI.getOperand(3).getImm();
1422 ARM_AM::ShiftOpc Opc = ARM_AM::getSORegShOp(ShiftOp);
1423 if (Opc == ARM_AM::asr)
1425 unsigned ShiftAmt = MI.getOperand(3).getImm();
1426 if (ShiftAmt == 32 && Opc == ARM_AM::asr)
1428 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1429 Binary |= ShiftAmt << ARMII::ShiftShift;
1435 void ARMCodeEmitter::emitBranchInstruction(const MachineInstr &MI) {
1436 const TargetInstrDesc &TID = MI.getDesc();
1438 if (TID.Opcode == ARM::TPsoft) {
1439 llvm_unreachable("ARM::TPsoft FIXME"); // FIXME
1442 // Part of binary is determined by TableGn.
1443 unsigned Binary = getBinaryCodeForInstr(MI);
1445 // Set the conditional execution predicate
1446 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1448 // Set signed_immed_24 field
1449 Binary |= getMachineOpValue(MI, 0);
1454 void ARMCodeEmitter::emitInlineJumpTable(unsigned JTIndex) {
1455 // Remember the base address of the inline jump table.
1456 uintptr_t JTBase = MCE.getCurrentPCValue();
1457 JTI->addJumpTableBaseAddr(JTIndex, JTBase);
1458 DEBUG(errs() << " ** Jump Table #" << JTIndex << " @ " << (void*)JTBase
1461 // Now emit the jump table entries.
1462 const std::vector<MachineBasicBlock*> &MBBs = (*MJTEs)[JTIndex].MBBs;
1463 for (unsigned i = 0, e = MBBs.size(); i != e; ++i) {
1465 // DestBB address - JT base.
1466 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_pic_jt, JTBase);
1468 // Absolute DestBB address.
1469 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_absolute);
1474 void ARMCodeEmitter::emitMiscBranchInstruction(const MachineInstr &MI) {
1475 const TargetInstrDesc &TID = MI.getDesc();
1477 // Handle jump tables.
1478 if (TID.Opcode == ARM::BR_JTr || TID.Opcode == ARM::BR_JTadd) {
1479 // First emit a ldr pc, [] instruction.
1480 emitDataProcessingInstruction(MI, ARM::PC);
1482 // Then emit the inline jump table.
1484 (TID.Opcode == ARM::BR_JTr)
1485 ? MI.getOperand(1).getIndex() : MI.getOperand(2).getIndex();
1486 emitInlineJumpTable(JTIndex);
1488 } else if (TID.Opcode == ARM::BR_JTm) {
1489 // First emit a ldr pc, [] instruction.
1490 emitLoadStoreInstruction(MI, ARM::PC);
1492 // Then emit the inline jump table.
1493 emitInlineJumpTable(MI.getOperand(3).getIndex());
1497 // Part of binary is determined by TableGn.
1498 unsigned Binary = getBinaryCodeForInstr(MI);
1500 // Set the conditional execution predicate
1501 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1503 if (TID.Opcode == ARM::BX_RET || TID.Opcode == ARM::MOVPCLR)
1504 // The return register is LR.
1505 Binary |= getARMRegisterNumbering(ARM::LR);
1507 // otherwise, set the return register
1508 Binary |= getMachineOpValue(MI, 0);
1513 static unsigned encodeVFPRd(const MachineInstr &MI, unsigned OpIdx) {
1514 unsigned RegD = MI.getOperand(OpIdx).getReg();
1515 unsigned Binary = 0;
1516 bool isSPVFP = ARM::SPRRegisterClass->contains(RegD);
1517 RegD = getARMRegisterNumbering(RegD);
1519 Binary |= RegD << ARMII::RegRdShift;
1521 Binary |= ((RegD & 0x1E) >> 1) << ARMII::RegRdShift;
1522 Binary |= (RegD & 0x01) << ARMII::D_BitShift;
1527 static unsigned encodeVFPRn(const MachineInstr &MI, unsigned OpIdx) {
1528 unsigned RegN = MI.getOperand(OpIdx).getReg();
1529 unsigned Binary = 0;
1530 bool isSPVFP = ARM::SPRRegisterClass->contains(RegN);
1531 RegN = getARMRegisterNumbering(RegN);
1533 Binary |= RegN << ARMII::RegRnShift;
1535 Binary |= ((RegN & 0x1E) >> 1) << ARMII::RegRnShift;
1536 Binary |= (RegN & 0x01) << ARMII::N_BitShift;
1541 static unsigned encodeVFPRm(const MachineInstr &MI, unsigned OpIdx) {
1542 unsigned RegM = MI.getOperand(OpIdx).getReg();
1543 unsigned Binary = 0;
1544 bool isSPVFP = ARM::SPRRegisterClass->contains(RegM);
1545 RegM = getARMRegisterNumbering(RegM);
1549 Binary |= ((RegM & 0x1E) >> 1);
1550 Binary |= (RegM & 0x01) << ARMII::M_BitShift;
1555 void ARMCodeEmitter::emitVFPArithInstruction(const MachineInstr &MI) {
1556 const TargetInstrDesc &TID = MI.getDesc();
1558 // Part of binary is determined by TableGn.
1559 unsigned Binary = getBinaryCodeForInstr(MI);
1561 // Set the conditional execution predicate
1562 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1565 assert((Binary & ARMII::D_BitShift) == 0 &&
1566 (Binary & ARMII::N_BitShift) == 0 &&
1567 (Binary & ARMII::M_BitShift) == 0 && "VFP encoding bug!");
1570 Binary |= encodeVFPRd(MI, OpIdx++);
1572 // If this is a two-address operand, skip it, e.g. FMACD.
1573 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1577 if ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPBinaryFrm)
1578 Binary |= encodeVFPRn(MI, OpIdx++);
1580 if (OpIdx == TID.getNumOperands() ||
1581 TID.OpInfo[OpIdx].isPredicate() ||
1582 TID.OpInfo[OpIdx].isOptionalDef()) {
1583 // FCMPEZD etc. has only one operand.
1589 Binary |= encodeVFPRm(MI, OpIdx);
1594 void ARMCodeEmitter::emitVFPConversionInstruction(const MachineInstr &MI) {
1595 const TargetInstrDesc &TID = MI.getDesc();
1596 unsigned Form = TID.TSFlags & ARMII::FormMask;
1598 // Part of binary is determined by TableGn.
1599 unsigned Binary = getBinaryCodeForInstr(MI);
1601 // Set the conditional execution predicate
1602 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1606 case ARMII::VFPConv1Frm:
1607 case ARMII::VFPConv2Frm:
1608 case ARMII::VFPConv3Frm:
1610 Binary |= encodeVFPRd(MI, 0);
1612 case ARMII::VFPConv4Frm:
1614 Binary |= encodeVFPRn(MI, 0);
1616 case ARMII::VFPConv5Frm:
1618 Binary |= encodeVFPRm(MI, 0);
1624 case ARMII::VFPConv1Frm:
1626 Binary |= encodeVFPRm(MI, 1);
1628 case ARMII::VFPConv2Frm:
1629 case ARMII::VFPConv3Frm:
1631 Binary |= encodeVFPRn(MI, 1);
1633 case ARMII::VFPConv4Frm:
1634 case ARMII::VFPConv5Frm:
1636 Binary |= encodeVFPRd(MI, 1);
1640 if (Form == ARMII::VFPConv5Frm)
1642 Binary |= encodeVFPRn(MI, 2);
1643 else if (Form == ARMII::VFPConv3Frm)
1645 Binary |= encodeVFPRm(MI, 2);
1650 void ARMCodeEmitter::emitVFPLoadStoreInstruction(const MachineInstr &MI) {
1651 // Part of binary is determined by TableGn.
1652 unsigned Binary = getBinaryCodeForInstr(MI);
1654 // Set the conditional execution predicate
1655 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1660 Binary |= encodeVFPRd(MI, OpIdx++);
1662 // Encode address base.
1663 const MachineOperand &Base = MI.getOperand(OpIdx++);
1664 Binary |= getMachineOpValue(MI, Base) << ARMII::RegRnShift;
1666 // If there is a non-zero immediate offset, encode it.
1668 const MachineOperand &Offset = MI.getOperand(OpIdx);
1669 if (unsigned ImmOffs = ARM_AM::getAM5Offset(Offset.getImm())) {
1670 if (ARM_AM::getAM5Op(Offset.getImm()) == ARM_AM::add)
1671 Binary |= 1 << ARMII::U_BitShift;
1678 // If immediate offset is omitted, default to +0.
1679 Binary |= 1 << ARMII::U_BitShift;
1685 ARMCodeEmitter::emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI) {
1686 const TargetInstrDesc &TID = MI.getDesc();
1687 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1689 // Part of binary is determined by TableGn.
1690 unsigned Binary = getBinaryCodeForInstr(MI);
1692 // Set the conditional execution predicate
1693 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1695 // Skip operand 0 of an instruction with base register update.
1700 // Set base address operand
1701 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1703 // Set addressing mode by modifying bits U(23) and P(24)
1704 ARM_AM::AMSubMode Mode = ARM_AM::getLoadStoreMultipleSubMode(MI.getOpcode());
1705 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(Mode));
1709 Binary |= 0x1 << ARMII::W_BitShift;
1711 // First register is encoded in Dd.
1712 Binary |= encodeVFPRd(MI, OpIdx+2);
1714 // Count the number of registers.
1715 unsigned NumRegs = 1;
1716 for (unsigned i = OpIdx+3, e = MI.getNumOperands(); i != e; ++i) {
1717 const MachineOperand &MO = MI.getOperand(i);
1718 if (!MO.isReg() || MO.isImplicit())
1722 // Bit 8 will be set if <list> is consecutive 64-bit registers (e.g., D0)
1723 // Otherwise, it will be 0, in the case of 32-bit registers.
1725 Binary |= NumRegs * 2;
1732 static unsigned encodeNEONRd(const MachineInstr &MI, unsigned OpIdx) {
1733 unsigned RegD = MI.getOperand(OpIdx).getReg();
1734 unsigned Binary = 0;
1735 RegD = getARMRegisterNumbering(RegD);
1736 Binary |= (RegD & 0xf) << ARMII::RegRdShift;
1737 Binary |= ((RegD >> 4) & 1) << ARMII::D_BitShift;
1741 static unsigned encodeNEONRn(const MachineInstr &MI, unsigned OpIdx) {
1742 unsigned RegN = MI.getOperand(OpIdx).getReg();
1743 unsigned Binary = 0;
1744 RegN = getARMRegisterNumbering(RegN);
1745 Binary |= (RegN & 0xf) << ARMII::RegRnShift;
1746 Binary |= ((RegN >> 4) & 1) << ARMII::N_BitShift;
1750 static unsigned encodeNEONRm(const MachineInstr &MI, unsigned OpIdx) {
1751 unsigned RegM = MI.getOperand(OpIdx).getReg();
1752 unsigned Binary = 0;
1753 RegM = getARMRegisterNumbering(RegM);
1754 Binary |= (RegM & 0xf);
1755 Binary |= ((RegM >> 4) & 1) << ARMII::M_BitShift;
1759 /// convertNEONDataProcToThumb - Convert the ARM mode encoding for a NEON
1760 /// data-processing instruction to the corresponding Thumb encoding.
1761 static unsigned convertNEONDataProcToThumb(unsigned Binary) {
1762 assert((Binary & 0xfe000000) == 0xf2000000 &&
1763 "not an ARM NEON data-processing instruction");
1764 unsigned UBit = (Binary >> 24) & 1;
1765 return 0xef000000 | (UBit << 28) | (Binary & 0xffffff);
1768 void ARMCodeEmitter::emitNEONLaneInstruction(const MachineInstr &MI) {
1769 unsigned Binary = getBinaryCodeForInstr(MI);
1771 unsigned RegTOpIdx, RegNOpIdx, LnOpIdx;
1772 const TargetInstrDesc &TID = MI.getDesc();
1773 if ((TID.TSFlags & ARMII::FormMask) == ARMII::NGetLnFrm) {
1777 } else { // ARMII::NSetLnFrm
1783 // Set the conditional execution predicate
1784 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1786 unsigned RegT = MI.getOperand(RegTOpIdx).getReg();
1787 RegT = getARMRegisterNumbering(RegT);
1788 Binary |= (RegT << ARMII::RegRdShift);
1789 Binary |= encodeNEONRn(MI, RegNOpIdx);
1792 if ((Binary & (1 << 22)) != 0)
1793 LaneShift = 0; // 8-bit elements
1794 else if ((Binary & (1 << 5)) != 0)
1795 LaneShift = 1; // 16-bit elements
1797 LaneShift = 2; // 32-bit elements
1799 unsigned Lane = MI.getOperand(LnOpIdx).getImm() << LaneShift;
1800 unsigned Opc1 = Lane >> 2;
1801 unsigned Opc2 = Lane & 3;
1802 assert((Opc1 & 3) == 0 && "out-of-range lane number operand");
1803 Binary |= (Opc1 << 21);
1804 Binary |= (Opc2 << 5);
1809 void ARMCodeEmitter::emitNEONDupInstruction(const MachineInstr &MI) {
1810 unsigned Binary = getBinaryCodeForInstr(MI);
1812 // Set the conditional execution predicate
1813 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1815 unsigned RegT = MI.getOperand(1).getReg();
1816 RegT = getARMRegisterNumbering(RegT);
1817 Binary |= (RegT << ARMII::RegRdShift);
1818 Binary |= encodeNEONRn(MI, 0);
1822 void ARMCodeEmitter::emitNEON1RegModImmInstruction(const MachineInstr &MI) {
1823 unsigned Binary = getBinaryCodeForInstr(MI);
1824 // Destination register is encoded in Dd.
1825 Binary |= encodeNEONRd(MI, 0);
1826 // Immediate fields: Op, Cmode, I, Imm3, Imm4
1827 unsigned Imm = MI.getOperand(1).getImm();
1828 unsigned Op = (Imm >> 12) & 1;
1829 unsigned Cmode = (Imm >> 8) & 0xf;
1830 unsigned I = (Imm >> 7) & 1;
1831 unsigned Imm3 = (Imm >> 4) & 0x7;
1832 unsigned Imm4 = Imm & 0xf;
1833 Binary |= (I << 24) | (Imm3 << 16) | (Cmode << 8) | (Op << 5) | Imm4;
1835 Binary = convertNEONDataProcToThumb(Binary);
1839 void ARMCodeEmitter::emitNEON2RegInstruction(const MachineInstr &MI) {
1840 const TargetInstrDesc &TID = MI.getDesc();
1841 unsigned Binary = getBinaryCodeForInstr(MI);
1842 // Destination register is encoded in Dd; source register in Dm.
1844 Binary |= encodeNEONRd(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 VDUPfdf or VDUPfqf.
1854 void ARMCodeEmitter::emitNEON3RegInstruction(const MachineInstr &MI) {
1855 const TargetInstrDesc &TID = MI.getDesc();
1856 unsigned Binary = getBinaryCodeForInstr(MI);
1857 // Destination register is encoded in Dd; source registers in Dn and Dm.
1859 Binary |= encodeNEONRd(MI, OpIdx++);
1860 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1862 Binary |= encodeNEONRn(MI, OpIdx++);
1863 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1865 Binary |= encodeNEONRm(MI, OpIdx);
1867 Binary = convertNEONDataProcToThumb(Binary);
1868 // FIXME: This does not handle VMOVDneon or VMOVQ.
1872 #include "ARMGenCodeEmitter.inc"