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 getTAddrModeRegRegOpValue(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 getAddrModePCOpValue(const MachineInstr &MI, unsigned Op)
270 uint32_t getAddrMode5OpValue(const MachineInstr &MI, unsigned Op) const {
272 // {12} = (U)nsigned (add == '1', sub == '0')
274 const MachineOperand &MO = MI.getOperand(Op);
275 const MachineOperand &MO1 = MI.getOperand(Op + 1);
277 emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry);
280 unsigned Reg = getARMRegisterNumbering(MO.getReg());
281 int32_t Imm12 = MO1.getImm();
283 // Special value for #-0
284 if (Imm12 == INT32_MIN)
287 // Immediate is always encoded as positive. The 'U' bit controls add vs
295 uint32_t Binary = Imm12 & 0xfff;
298 Binary |= (Reg << 13);
301 unsigned getNEONVcvtImm32OpValue(const MachineInstr &MI, unsigned Op)
304 unsigned getRegisterListOpValue(const MachineInstr &MI, unsigned Op)
307 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
308 /// machine operand requires relocation, record the relocation and return
310 unsigned getMovi32Value(const MachineInstr &MI,const MachineOperand &MO,
313 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
315 unsigned getShiftOp(unsigned Imm) const ;
317 /// Routines that handle operands which add machine relocations which are
318 /// fixed up by the relocation stage.
319 void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
320 bool MayNeedFarStub, bool Indirect,
321 intptr_t ACPV = 0) const;
322 void emitExternalSymbolAddress(const char *ES, unsigned Reloc) const;
323 void emitConstPoolAddress(unsigned CPI, unsigned Reloc) const;
324 void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const;
325 void emitMachineBasicBlock(MachineBasicBlock *BB, unsigned Reloc,
326 intptr_t JTBase = 0) const;
330 char ARMCodeEmitter::ID = 0;
332 /// createARMJITCodeEmitterPass - Return a pass that emits the collected ARM
333 /// code to the specified MCE object.
334 FunctionPass *llvm::createARMJITCodeEmitterPass(ARMBaseTargetMachine &TM,
335 JITCodeEmitter &JCE) {
336 return new ARMCodeEmitter(TM, JCE);
339 bool ARMCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
340 assert((MF.getTarget().getRelocationModel() != Reloc::Default ||
341 MF.getTarget().getRelocationModel() != Reloc::Static) &&
342 "JIT relocation model must be set to static or default!");
343 JTI = ((ARMTargetMachine &)MF.getTarget()).getJITInfo();
344 II = ((const ARMTargetMachine &)MF.getTarget()).getInstrInfo();
345 TD = ((const ARMTargetMachine &)MF.getTarget()).getTargetData();
346 Subtarget = &TM.getSubtarget<ARMSubtarget>();
347 MCPEs = &MF.getConstantPool()->getConstants();
349 if (MF.getJumpTableInfo()) MJTEs = &MF.getJumpTableInfo()->getJumpTables();
350 IsPIC = TM.getRelocationModel() == Reloc::PIC_;
351 IsThumb = MF.getInfo<ARMFunctionInfo>()->isThumbFunction();
352 JTI->Initialize(MF, IsPIC);
353 MMI = &getAnalysis<MachineModuleInfo>();
354 MCE.setModuleInfo(MMI);
357 DEBUG(errs() << "JITTing function '"
358 << MF.getFunction()->getName() << "'\n");
359 MCE.startFunction(MF);
360 for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
362 MCE.StartMachineBasicBlock(MBB);
363 for (MachineBasicBlock::const_iterator I = MBB->begin(), E = MBB->end();
367 } while (MCE.finishFunction(MF));
372 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
374 unsigned ARMCodeEmitter::getShiftOp(unsigned Imm) const {
375 switch (ARM_AM::getAM2ShiftOpc(Imm)) {
376 default: llvm_unreachable("Unknown shift opc!");
377 case ARM_AM::asr: return 2;
378 case ARM_AM::lsl: return 0;
379 case ARM_AM::lsr: return 1;
381 case ARM_AM::rrx: return 3;
386 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
387 /// machine operand requires relocation, record the relocation and return zero.
388 unsigned ARMCodeEmitter::getMovi32Value(const MachineInstr &MI,
389 const MachineOperand &MO,
391 assert(((Reloc == ARM::reloc_arm_movt) || (Reloc == ARM::reloc_arm_movw))
392 && "Relocation to this function should be for movt or movw");
395 return static_cast<unsigned>(MO.getImm());
396 else if (MO.isGlobal())
397 emitGlobalAddress(MO.getGlobal(), Reloc, true, false);
398 else if (MO.isSymbol())
399 emitExternalSymbolAddress(MO.getSymbolName(), Reloc);
401 emitMachineBasicBlock(MO.getMBB(), Reloc);
406 llvm_unreachable("Unsupported operand type for movw/movt");
411 /// getMachineOpValue - Return binary encoding of operand. If the machine
412 /// operand requires relocation, record the relocation and return zero.
413 unsigned ARMCodeEmitter::getMachineOpValue(const MachineInstr &MI,
414 const MachineOperand &MO) const {
416 return getARMRegisterNumbering(MO.getReg());
418 return static_cast<unsigned>(MO.getImm());
419 else if (MO.isGlobal())
420 emitGlobalAddress(MO.getGlobal(), ARM::reloc_arm_branch, true, false);
421 else if (MO.isSymbol())
422 emitExternalSymbolAddress(MO.getSymbolName(), ARM::reloc_arm_branch);
423 else if (MO.isCPI()) {
424 const TargetInstrDesc &TID = MI.getDesc();
425 // For VFP load, the immediate offset is multiplied by 4.
426 unsigned Reloc = ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPLdStFrm)
427 ? ARM::reloc_arm_vfp_cp_entry : ARM::reloc_arm_cp_entry;
428 emitConstPoolAddress(MO.getIndex(), Reloc);
429 } else if (MO.isJTI())
430 emitJumpTableAddress(MO.getIndex(), ARM::reloc_arm_relative);
432 emitMachineBasicBlock(MO.getMBB(), ARM::reloc_arm_branch);
434 llvm_unreachable("Unable to encode MachineOperand!");
438 /// emitGlobalAddress - Emit the specified address to the code stream.
440 void ARMCodeEmitter::emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
441 bool MayNeedFarStub, bool Indirect,
442 intptr_t ACPV) const {
443 MachineRelocation MR = Indirect
444 ? MachineRelocation::getIndirectSymbol(MCE.getCurrentPCOffset(), Reloc,
445 const_cast<GlobalValue *>(GV),
446 ACPV, MayNeedFarStub)
447 : MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc,
448 const_cast<GlobalValue *>(GV), ACPV,
450 MCE.addRelocation(MR);
453 /// emitExternalSymbolAddress - Arrange for the address of an external symbol to
454 /// be emitted to the current location in the function, and allow it to be PC
456 void ARMCodeEmitter::
457 emitExternalSymbolAddress(const char *ES, unsigned Reloc) const {
458 MCE.addRelocation(MachineRelocation::getExtSym(MCE.getCurrentPCOffset(),
462 /// emitConstPoolAddress - Arrange for the address of an constant pool
463 /// to be emitted to the current location in the function, and allow it to be PC
465 void ARMCodeEmitter::emitConstPoolAddress(unsigned CPI, unsigned Reloc) const {
466 // Tell JIT emitter we'll resolve the address.
467 MCE.addRelocation(MachineRelocation::getConstPool(MCE.getCurrentPCOffset(),
468 Reloc, CPI, 0, true));
471 /// emitJumpTableAddress - Arrange for the address of a jump table to
472 /// be emitted to the current location in the function, and allow it to be PC
474 void ARMCodeEmitter::
475 emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const {
476 MCE.addRelocation(MachineRelocation::getJumpTable(MCE.getCurrentPCOffset(),
477 Reloc, JTIndex, 0, true));
480 /// emitMachineBasicBlock - Emit the specified address basic block.
481 void ARMCodeEmitter::emitMachineBasicBlock(MachineBasicBlock *BB,
483 intptr_t JTBase) const {
484 MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(),
488 void ARMCodeEmitter::emitWordLE(unsigned Binary) {
489 DEBUG(errs() << " 0x";
490 errs().write_hex(Binary) << "\n");
491 MCE.emitWordLE(Binary);
494 void ARMCodeEmitter::emitDWordLE(uint64_t Binary) {
495 DEBUG(errs() << " 0x";
496 errs().write_hex(Binary) << "\n");
497 MCE.emitDWordLE(Binary);
500 void ARMCodeEmitter::emitInstruction(const MachineInstr &MI) {
501 DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << MI);
503 MCE.processDebugLoc(MI.getDebugLoc(), true);
505 ++NumEmitted; // Keep track of the # of mi's emitted
506 switch (MI.getDesc().TSFlags & ARMII::FormMask) {
508 llvm_unreachable("Unhandled instruction encoding format!");
512 if (MI.getOpcode() == ARM::LEApcrelJT) {
513 // Materialize jumptable address.
514 emitLEApcrelJTInstruction(MI);
517 llvm_unreachable("Unhandled instruction encoding!");
520 emitPseudoInstruction(MI);
523 case ARMII::DPSoRegFrm:
524 emitDataProcessingInstruction(MI);
528 emitLoadStoreInstruction(MI);
530 case ARMII::LdMiscFrm:
531 case ARMII::StMiscFrm:
532 emitMiscLoadStoreInstruction(MI);
534 case ARMII::LdStMulFrm:
535 emitLoadStoreMultipleInstruction(MI);
538 emitMulFrmInstruction(MI);
541 emitExtendInstruction(MI);
543 case ARMII::ArithMiscFrm:
544 emitMiscArithInstruction(MI);
547 emitSaturateInstruction(MI);
550 emitBranchInstruction(MI);
552 case ARMII::BrMiscFrm:
553 emitMiscBranchInstruction(MI);
556 case ARMII::VFPUnaryFrm:
557 case ARMII::VFPBinaryFrm:
558 emitVFPArithInstruction(MI);
560 case ARMII::VFPConv1Frm:
561 case ARMII::VFPConv2Frm:
562 case ARMII::VFPConv3Frm:
563 case ARMII::VFPConv4Frm:
564 case ARMII::VFPConv5Frm:
565 emitVFPConversionInstruction(MI);
567 case ARMII::VFPLdStFrm:
568 emitVFPLoadStoreInstruction(MI);
570 case ARMII::VFPLdStMulFrm:
571 emitVFPLoadStoreMultipleInstruction(MI);
574 // NEON instructions.
575 case ARMII::NGetLnFrm:
576 case ARMII::NSetLnFrm:
577 emitNEONLaneInstruction(MI);
580 emitNEONDupInstruction(MI);
582 case ARMII::N1RegModImmFrm:
583 emitNEON1RegModImmInstruction(MI);
585 case ARMII::N2RegFrm:
586 emitNEON2RegInstruction(MI);
588 case ARMII::N3RegFrm:
589 emitNEON3RegInstruction(MI);
592 MCE.processDebugLoc(MI.getDebugLoc(), false);
595 void ARMCodeEmitter::emitConstPoolInstruction(const MachineInstr &MI) {
596 unsigned CPI = MI.getOperand(0).getImm(); // CP instruction index.
597 unsigned CPIndex = MI.getOperand(1).getIndex(); // Actual cp entry index.
598 const MachineConstantPoolEntry &MCPE = (*MCPEs)[CPIndex];
600 // Remember the CONSTPOOL_ENTRY address for later relocation.
601 JTI->addConstantPoolEntryAddr(CPI, MCE.getCurrentPCValue());
603 // Emit constpool island entry. In most cases, the actual values will be
604 // resolved and relocated after code emission.
605 if (MCPE.isMachineConstantPoolEntry()) {
606 ARMConstantPoolValue *ACPV =
607 static_cast<ARMConstantPoolValue*>(MCPE.Val.MachineCPVal);
609 DEBUG(errs() << " ** ARM constant pool #" << CPI << " @ "
610 << (void*)MCE.getCurrentPCValue() << " " << *ACPV << '\n');
612 assert(ACPV->isGlobalValue() && "unsupported constant pool value");
613 const GlobalValue *GV = ACPV->getGV();
615 Reloc::Model RelocM = TM.getRelocationModel();
616 emitGlobalAddress(GV, ARM::reloc_arm_machine_cp_entry,
618 Subtarget->GVIsIndirectSymbol(GV, RelocM),
621 emitExternalSymbolAddress(ACPV->getSymbol(), ARM::reloc_arm_absolute);
625 const Constant *CV = MCPE.Val.ConstVal;
628 errs() << " ** Constant pool #" << CPI << " @ "
629 << (void*)MCE.getCurrentPCValue() << " ";
630 if (const Function *F = dyn_cast<Function>(CV))
631 errs() << F->getName();
637 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
638 emitGlobalAddress(GV, ARM::reloc_arm_absolute, isa<Function>(GV), false);
640 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
641 uint32_t Val = uint32_t(*CI->getValue().getRawData());
643 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
644 if (CFP->getType()->isFloatTy())
645 emitWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
646 else if (CFP->getType()->isDoubleTy())
647 emitDWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
649 llvm_unreachable("Unable to handle this constantpool entry!");
652 llvm_unreachable("Unable to handle this constantpool entry!");
657 void ARMCodeEmitter::emitMOVi32immInstruction(const MachineInstr &MI) {
658 const MachineOperand &MO0 = MI.getOperand(0);
659 const MachineOperand &MO1 = MI.getOperand(1);
661 // Emit the 'movw' instruction.
662 unsigned Binary = 0x30 << 20; // mov: Insts{27-20} = 0b00110000
664 unsigned Lo16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movw) & 0xFFFF;
666 // Set the conditional execution predicate.
667 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
670 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
672 // Encode imm16 as imm4:imm12
673 Binary |= Lo16 & 0xFFF; // Insts{11-0} = imm12
674 Binary |= ((Lo16 >> 12) & 0xF) << 16; // Insts{19-16} = imm4
677 unsigned Hi16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movt) >> 16;
678 // Emit the 'movt' instruction.
679 Binary = 0x34 << 20; // movt: Insts{27-20} = 0b00110100
681 // Set the conditional execution predicate.
682 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
685 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
687 // Encode imm16 as imm4:imm1, same as movw above.
688 Binary |= Hi16 & 0xFFF;
689 Binary |= ((Hi16 >> 12) & 0xF) << 16;
693 void ARMCodeEmitter::emitMOVi2piecesInstruction(const MachineInstr &MI) {
694 const MachineOperand &MO0 = MI.getOperand(0);
695 const MachineOperand &MO1 = MI.getOperand(1);
696 assert(MO1.isImm() && ARM_AM::isSOImmTwoPartVal(MO1.getImm()) &&
697 "Not a valid so_imm value!");
698 unsigned V1 = ARM_AM::getSOImmTwoPartFirst(MO1.getImm());
699 unsigned V2 = ARM_AM::getSOImmTwoPartSecond(MO1.getImm());
701 // Emit the 'mov' instruction.
702 unsigned Binary = 0xd << 21; // mov: Insts{24-21} = 0b1101
704 // Set the conditional execution predicate.
705 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
708 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
711 // Set bit I(25) to identify this is the immediate form of <shifter_op>
712 Binary |= 1 << ARMII::I_BitShift;
713 Binary |= getMachineSoImmOpValue(V1);
716 // Now the 'orr' instruction.
717 Binary = 0xc << 21; // orr: Insts{24-21} = 0b1100
719 // Set the conditional execution predicate.
720 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
723 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
726 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRnShift;
729 // Set bit I(25) to identify this is the immediate form of <shifter_op>
730 Binary |= 1 << ARMII::I_BitShift;
731 Binary |= getMachineSoImmOpValue(V2);
735 void ARMCodeEmitter::emitLEApcrelJTInstruction(const MachineInstr &MI) {
736 // It's basically add r, pc, (LJTI - $+8)
738 const TargetInstrDesc &TID = MI.getDesc();
740 // Emit the 'add' instruction.
741 unsigned Binary = 0x4 << 21; // add: Insts{24-21} = 0b0100
743 // Set the conditional execution predicate
744 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
746 // Encode S bit if MI modifies CPSR.
747 Binary |= getAddrModeSBit(MI, TID);
750 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
752 // Encode Rn which is PC.
753 Binary |= getARMRegisterNumbering(ARM::PC) << ARMII::RegRnShift;
755 // Encode the displacement.
756 Binary |= 1 << ARMII::I_BitShift;
757 emitJumpTableAddress(MI.getOperand(1).getIndex(), ARM::reloc_arm_jt_base);
762 void ARMCodeEmitter::emitPseudoMoveInstruction(const MachineInstr &MI) {
763 unsigned Opcode = MI.getDesc().Opcode;
765 // Part of binary is determined by TableGn.
766 unsigned Binary = getBinaryCodeForInstr(MI);
768 // Set the conditional execution predicate
769 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
771 // Encode S bit if MI modifies CPSR.
772 if (Opcode == ARM::MOVsrl_flag || Opcode == ARM::MOVsra_flag)
773 Binary |= 1 << ARMII::S_BitShift;
775 // Encode register def if there is one.
776 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
778 // Encode the shift operation.
785 case ARM::MOVsrl_flag:
787 Binary |= (0x2 << 4) | (1 << 7);
789 case ARM::MOVsra_flag:
791 Binary |= (0x4 << 4) | (1 << 7);
795 // Encode register Rm.
796 Binary |= getMachineOpValue(MI, 1);
801 void ARMCodeEmitter::addPCLabel(unsigned LabelID) {
802 DEBUG(errs() << " ** LPC" << LabelID << " @ "
803 << (void*)MCE.getCurrentPCValue() << '\n');
804 JTI->addPCLabelAddr(LabelID, MCE.getCurrentPCValue());
807 void ARMCodeEmitter::emitPseudoInstruction(const MachineInstr &MI) {
808 unsigned Opcode = MI.getDesc().Opcode;
811 llvm_unreachable("ARMCodeEmitter::emitPseudoInstruction");
813 case ARM::BMOVPCRX_CALL:
815 case ARM::BMOVPCRXr9_CALL: {
816 // First emit mov lr, pc
817 unsigned Binary = 0x01a0e00f;
818 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
821 // and then emit the branch.
822 emitMiscBranchInstruction(MI);
825 case TargetOpcode::INLINEASM: {
826 // We allow inline assembler nodes with empty bodies - they can
827 // implicitly define registers, which is ok for JIT.
828 if (MI.getOperand(0).getSymbolName()[0]) {
829 report_fatal_error("JIT does not support inline asm!");
833 case TargetOpcode::PROLOG_LABEL:
834 case TargetOpcode::EH_LABEL:
835 MCE.emitLabel(MI.getOperand(0).getMCSymbol());
837 case TargetOpcode::IMPLICIT_DEF:
838 case TargetOpcode::KILL:
841 case ARM::CONSTPOOL_ENTRY:
842 emitConstPoolInstruction(MI);
845 // Remember of the address of the PC label for relocation later.
846 addPCLabel(MI.getOperand(2).getImm());
847 // PICADD is just an add instruction that implicitly read pc.
848 emitDataProcessingInstruction(MI, 0, ARM::PC);
855 // Remember of the address of the PC label for relocation later.
856 addPCLabel(MI.getOperand(2).getImm());
857 // These are just load / store instructions that implicitly read pc.
858 emitLoadStoreInstruction(MI, 0, ARM::PC);
865 // Remember of the address of the PC label for relocation later.
866 addPCLabel(MI.getOperand(2).getImm());
867 // These are just load / store instructions that implicitly read pc.
868 emitMiscLoadStoreInstruction(MI, ARM::PC);
873 // Two instructions to materialize a constant.
874 if (Subtarget->hasV6T2Ops())
875 emitMOVi32immInstruction(MI);
877 emitMOVi2piecesInstruction(MI);
880 case ARM::LEApcrelJT:
881 // Materialize jumptable address.
882 emitLEApcrelJTInstruction(MI);
885 case ARM::MOVsrl_flag:
886 case ARM::MOVsra_flag:
887 emitPseudoMoveInstruction(MI);
892 unsigned ARMCodeEmitter::getMachineSoRegOpValue(const MachineInstr &MI,
893 const TargetInstrDesc &TID,
894 const MachineOperand &MO,
896 unsigned Binary = getMachineOpValue(MI, MO);
898 const MachineOperand &MO1 = MI.getOperand(OpIdx + 1);
899 const MachineOperand &MO2 = MI.getOperand(OpIdx + 2);
900 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO2.getImm());
902 // Encode the shift opcode.
904 unsigned Rs = MO1.getReg();
906 // Set shift operand (bit[7:4]).
911 // RRX - 0110 and bit[11:8] clear.
913 default: llvm_unreachable("Unknown shift opc!");
914 case ARM_AM::lsl: SBits = 0x1; break;
915 case ARM_AM::lsr: SBits = 0x3; break;
916 case ARM_AM::asr: SBits = 0x5; break;
917 case ARM_AM::ror: SBits = 0x7; break;
918 case ARM_AM::rrx: SBits = 0x6; break;
921 // Set shift operand (bit[6:4]).
927 default: llvm_unreachable("Unknown shift opc!");
928 case ARM_AM::lsl: SBits = 0x0; break;
929 case ARM_AM::lsr: SBits = 0x2; break;
930 case ARM_AM::asr: SBits = 0x4; break;
931 case ARM_AM::ror: SBits = 0x6; break;
934 Binary |= SBits << 4;
935 if (SOpc == ARM_AM::rrx)
938 // Encode the shift operation Rs or shift_imm (except rrx).
940 // Encode Rs bit[11:8].
941 assert(ARM_AM::getSORegOffset(MO2.getImm()) == 0);
942 return Binary | (getARMRegisterNumbering(Rs) << ARMII::RegRsShift);
945 // Encode shift_imm bit[11:7].
946 return Binary | ARM_AM::getSORegOffset(MO2.getImm()) << 7;
949 unsigned ARMCodeEmitter::getMachineSoImmOpValue(unsigned SoImm) {
950 int SoImmVal = ARM_AM::getSOImmVal(SoImm);
951 assert(SoImmVal != -1 && "Not a valid so_imm value!");
953 // Encode rotate_imm.
954 unsigned Binary = (ARM_AM::getSOImmValRot((unsigned)SoImmVal) >> 1)
955 << ARMII::SoRotImmShift;
958 Binary |= ARM_AM::getSOImmValImm((unsigned)SoImmVal);
962 unsigned ARMCodeEmitter::getAddrModeSBit(const MachineInstr &MI,
963 const TargetInstrDesc &TID) const {
964 for (unsigned i = MI.getNumOperands(), e = TID.getNumOperands(); i != e; --i){
965 const MachineOperand &MO = MI.getOperand(i-1);
966 if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR)
967 return 1 << ARMII::S_BitShift;
972 void ARMCodeEmitter::emitDataProcessingInstruction(const MachineInstr &MI,
974 unsigned ImplicitRn) {
975 const TargetInstrDesc &TID = MI.getDesc();
977 // Part of binary is determined by TableGn.
978 unsigned Binary = getBinaryCodeForInstr(MI);
980 // Set the conditional execution predicate
981 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
983 // Encode S bit if MI modifies CPSR.
984 Binary |= getAddrModeSBit(MI, TID);
986 // Encode register def if there is one.
987 unsigned NumDefs = TID.getNumDefs();
990 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
992 // Special handling for implicit use (e.g. PC).
993 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
995 if (TID.Opcode == ARM::MOVi16) {
996 // Get immediate from MI.
997 unsigned Lo16 = getMovi32Value(MI, MI.getOperand(OpIdx),
998 ARM::reloc_arm_movw);
999 // Encode imm which is the same as in emitMOVi32immInstruction().
1000 Binary |= Lo16 & 0xFFF;
1001 Binary |= ((Lo16 >> 12) & 0xF) << 16;
1004 } else if(TID.Opcode == ARM::MOVTi16) {
1005 unsigned Hi16 = (getMovi32Value(MI, MI.getOperand(OpIdx),
1006 ARM::reloc_arm_movt) >> 16);
1007 Binary |= Hi16 & 0xFFF;
1008 Binary |= ((Hi16 >> 12) & 0xF) << 16;
1011 } else if ((TID.Opcode == ARM::BFC) || (TID.Opcode == ARM::BFI)) {
1012 uint32_t v = ~MI.getOperand(2).getImm();
1013 int32_t lsb = CountTrailingZeros_32(v);
1014 int32_t msb = (32 - CountLeadingZeros_32(v)) - 1;
1015 // Instr{20-16} = msb, Instr{11-7} = lsb
1016 Binary |= (msb & 0x1F) << 16;
1017 Binary |= (lsb & 0x1F) << 7;
1020 } else if ((TID.Opcode == ARM::UBFX) || (TID.Opcode == ARM::SBFX)) {
1021 // Encode Rn in Instr{0-3}
1022 Binary |= getMachineOpValue(MI, OpIdx++);
1024 uint32_t lsb = MI.getOperand(OpIdx++).getImm();
1025 uint32_t widthm1 = MI.getOperand(OpIdx++).getImm() - 1;
1027 // Instr{20-16} = widthm1, Instr{11-7} = lsb
1028 Binary |= (widthm1 & 0x1F) << 16;
1029 Binary |= (lsb & 0x1F) << 7;
1034 // If this is a two-address operand, skip it. e.g. MOVCCr operand 1.
1035 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1038 // Encode first non-shifter register operand if there is one.
1039 bool isUnary = TID.TSFlags & ARMII::UnaryDP;
1042 // Special handling for implicit use (e.g. PC).
1043 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1045 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRnShift;
1050 // Encode shifter operand.
1051 const MachineOperand &MO = MI.getOperand(OpIdx);
1052 if ((TID.TSFlags & ARMII::FormMask) == ARMII::DPSoRegFrm) {
1054 emitWordLE(Binary | getMachineSoRegOpValue(MI, TID, MO, OpIdx));
1059 // Encode register Rm.
1060 emitWordLE(Binary | getARMRegisterNumbering(MO.getReg()));
1065 Binary |= getMachineSoImmOpValue((unsigned)MO.getImm());
1070 void ARMCodeEmitter::emitLoadStoreInstruction(const MachineInstr &MI,
1071 unsigned ImplicitRd,
1072 unsigned ImplicitRn) {
1073 const TargetInstrDesc &TID = MI.getDesc();
1074 unsigned Form = TID.TSFlags & ARMII::FormMask;
1075 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1077 // Part of binary is determined by TableGn.
1078 unsigned Binary = getBinaryCodeForInstr(MI);
1080 // If this is an LDRi12, STRi12 or LDRcp, nothing more needs be done.
1081 if (MI.getOpcode() == ARM::LDRi12 || MI.getOpcode() == ARM::LDRcp ||
1082 MI.getOpcode() == ARM::STRi12) {
1087 // Set the conditional execution predicate
1088 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1092 // Operand 0 of a pre- and post-indexed store is the address base
1093 // writeback. Skip it.
1094 bool Skipped = false;
1095 if (IsPrePost && Form == ARMII::StFrm) {
1100 // Set first operand
1102 // Special handling for implicit use (e.g. PC).
1103 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
1105 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1107 // Set second operand
1109 // Special handling for implicit use (e.g. PC).
1110 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1112 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1114 // If this is a two-address operand, skip it. e.g. LDR_PRE.
1115 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1118 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1119 unsigned AM2Opc = (ImplicitRn == ARM::PC)
1120 ? 0 : MI.getOperand(OpIdx+1).getImm();
1122 // Set bit U(23) according to sign of immed value (positive or negative).
1123 Binary |= ((ARM_AM::getAM2Op(AM2Opc) == ARM_AM::add ? 1 : 0) <<
1125 if (!MO2.getReg()) { // is immediate
1126 if (ARM_AM::getAM2Offset(AM2Opc))
1127 // Set the value of offset_12 field
1128 Binary |= ARM_AM::getAM2Offset(AM2Opc);
1133 // Set bit I(25), because this is not in immediate encoding.
1134 Binary |= 1 << ARMII::I_BitShift;
1135 assert(TargetRegisterInfo::isPhysicalRegister(MO2.getReg()));
1136 // Set bit[3:0] to the corresponding Rm register
1137 Binary |= getARMRegisterNumbering(MO2.getReg());
1139 // If this instr is in scaled register offset/index instruction, set
1140 // shift_immed(bit[11:7]) and shift(bit[6:5]) fields.
1141 if (unsigned ShImm = ARM_AM::getAM2Offset(AM2Opc)) {
1142 Binary |= getShiftOp(AM2Opc) << ARMII::ShiftImmShift; // shift
1143 Binary |= ShImm << ARMII::ShiftShift; // shift_immed
1149 void ARMCodeEmitter::emitMiscLoadStoreInstruction(const MachineInstr &MI,
1150 unsigned ImplicitRn) {
1151 const TargetInstrDesc &TID = MI.getDesc();
1152 unsigned Form = TID.TSFlags & ARMII::FormMask;
1153 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1155 // Part of binary is determined by TableGn.
1156 unsigned Binary = getBinaryCodeForInstr(MI);
1158 // Set the conditional execution predicate
1159 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1163 // Operand 0 of a pre- and post-indexed store is the address base
1164 // writeback. Skip it.
1165 bool Skipped = false;
1166 if (IsPrePost && Form == ARMII::StMiscFrm) {
1171 // Set first operand
1172 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1174 // Skip LDRD and STRD's second operand.
1175 if (TID.Opcode == ARM::LDRD || TID.Opcode == ARM::STRD)
1178 // Set second operand
1180 // Special handling for implicit use (e.g. PC).
1181 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1183 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1185 // If this is a two-address operand, skip it. e.g. LDRH_POST.
1186 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1189 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1190 unsigned AM3Opc = (ImplicitRn == ARM::PC)
1191 ? 0 : MI.getOperand(OpIdx+1).getImm();
1193 // Set bit U(23) according to sign of immed value (positive or negative)
1194 Binary |= ((ARM_AM::getAM3Op(AM3Opc) == ARM_AM::add ? 1 : 0) <<
1197 // If this instr is in register offset/index encoding, set bit[3:0]
1198 // to the corresponding Rm register.
1200 Binary |= getARMRegisterNumbering(MO2.getReg());
1205 // This instr is in immediate offset/index encoding, set bit 22 to 1.
1206 Binary |= 1 << ARMII::AM3_I_BitShift;
1207 if (unsigned ImmOffs = ARM_AM::getAM3Offset(AM3Opc)) {
1209 Binary |= (ImmOffs >> 4) << ARMII::ImmHiShift; // immedH
1210 Binary |= (ImmOffs & 0xF); // immedL
1216 static unsigned getAddrModeUPBits(unsigned Mode) {
1217 unsigned Binary = 0;
1219 // Set addressing mode by modifying bits U(23) and P(24)
1220 // IA - Increment after - bit U = 1 and bit P = 0
1221 // IB - Increment before - bit U = 1 and bit P = 1
1222 // DA - Decrement after - bit U = 0 and bit P = 0
1223 // DB - Decrement before - bit U = 0 and bit P = 1
1225 default: llvm_unreachable("Unknown addressing sub-mode!");
1226 case ARM_AM::da: break;
1227 case ARM_AM::db: Binary |= 0x1 << ARMII::P_BitShift; break;
1228 case ARM_AM::ia: Binary |= 0x1 << ARMII::U_BitShift; break;
1229 case ARM_AM::ib: Binary |= 0x3 << ARMII::U_BitShift; break;
1235 void ARMCodeEmitter::emitLoadStoreMultipleInstruction(const MachineInstr &MI) {
1236 const TargetInstrDesc &TID = MI.getDesc();
1237 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1239 // Part of binary is determined by TableGn.
1240 unsigned Binary = getBinaryCodeForInstr(MI);
1242 // Set the conditional execution predicate
1243 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1245 // Skip operand 0 of an instruction with base register update.
1250 // Set base address operand
1251 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1253 // Set addressing mode by modifying bits U(23) and P(24)
1254 ARM_AM::AMSubMode Mode = ARM_AM::getLoadStoreMultipleSubMode(MI.getOpcode());
1255 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(Mode));
1259 Binary |= 0x1 << ARMII::W_BitShift;
1262 for (unsigned i = OpIdx+2, e = MI.getNumOperands(); i != e; ++i) {
1263 const MachineOperand &MO = MI.getOperand(i);
1264 if (!MO.isReg() || MO.isImplicit())
1266 unsigned RegNum = getARMRegisterNumbering(MO.getReg());
1267 assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
1269 Binary |= 0x1 << RegNum;
1275 void ARMCodeEmitter::emitMulFrmInstruction(const MachineInstr &MI) {
1276 const TargetInstrDesc &TID = MI.getDesc();
1278 // Part of binary is determined by TableGn.
1279 unsigned Binary = getBinaryCodeForInstr(MI);
1281 // Set the conditional execution predicate
1282 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1284 // Encode S bit if MI modifies CPSR.
1285 Binary |= getAddrModeSBit(MI, TID);
1287 // 32x32->64bit operations have two destination registers. The number
1288 // of register definitions will tell us if that's what we're dealing with.
1290 if (TID.getNumDefs() == 2)
1291 Binary |= getMachineOpValue (MI, OpIdx++) << ARMII::RegRdLoShift;
1294 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdHiShift;
1297 Binary |= getMachineOpValue(MI, OpIdx++);
1300 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRsShift;
1302 // Many multiple instructions (e.g. MLA) have three src operands. Encode
1303 // it as Rn (for multiply, that's in the same offset as RdLo.
1304 if (TID.getNumOperands() > OpIdx &&
1305 !TID.OpInfo[OpIdx].isPredicate() &&
1306 !TID.OpInfo[OpIdx].isOptionalDef())
1307 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRdLoShift;
1312 void ARMCodeEmitter::emitExtendInstruction(const MachineInstr &MI) {
1313 const TargetInstrDesc &TID = MI.getDesc();
1315 // Part of binary is determined by TableGn.
1316 unsigned Binary = getBinaryCodeForInstr(MI);
1318 // Set the conditional execution predicate
1319 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1324 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1326 const MachineOperand &MO1 = MI.getOperand(OpIdx++);
1327 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1329 // Two register operand form.
1331 Binary |= getMachineOpValue(MI, MO1) << ARMII::RegRnShift;
1334 Binary |= getMachineOpValue(MI, MO2);
1337 Binary |= getMachineOpValue(MI, MO1);
1340 // Encode rot imm (0, 8, 16, or 24) if it has a rotate immediate operand.
1341 if (MI.getOperand(OpIdx).isImm() &&
1342 !TID.OpInfo[OpIdx].isPredicate() &&
1343 !TID.OpInfo[OpIdx].isOptionalDef())
1344 Binary |= (getMachineOpValue(MI, OpIdx) / 8) << ARMII::ExtRotImmShift;
1349 void ARMCodeEmitter::emitMiscArithInstruction(const MachineInstr &MI) {
1350 const TargetInstrDesc &TID = MI.getDesc();
1352 // Part of binary is determined by TableGn.
1353 unsigned Binary = getBinaryCodeForInstr(MI);
1355 // Set the conditional execution predicate
1356 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1361 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1363 const MachineOperand &MO = MI.getOperand(OpIdx++);
1364 if (OpIdx == TID.getNumOperands() ||
1365 TID.OpInfo[OpIdx].isPredicate() ||
1366 TID.OpInfo[OpIdx].isOptionalDef()) {
1367 // Encode Rm and it's done.
1368 Binary |= getMachineOpValue(MI, MO);
1374 Binary |= getMachineOpValue(MI, MO) << ARMII::RegRnShift;
1377 Binary |= getMachineOpValue(MI, OpIdx++);
1379 // Encode shift_imm.
1380 unsigned ShiftAmt = MI.getOperand(OpIdx).getImm();
1381 if (TID.Opcode == ARM::PKHTB) {
1382 assert(ShiftAmt != 0 && "PKHTB shift_imm is 0!");
1386 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1387 Binary |= ShiftAmt << ARMII::ShiftShift;
1392 void ARMCodeEmitter::emitSaturateInstruction(const MachineInstr &MI) {
1393 const TargetInstrDesc &TID = MI.getDesc();
1395 // Part of binary is determined by TableGen.
1396 unsigned Binary = getBinaryCodeForInstr(MI);
1398 // Set the conditional execution predicate
1399 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1402 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
1404 // Encode saturate bit position.
1405 unsigned Pos = MI.getOperand(1).getImm();
1406 if (TID.Opcode == ARM::SSAT || TID.Opcode == ARM::SSAT16)
1408 assert((Pos < 16 || (Pos < 32 &&
1409 TID.Opcode != ARM::SSAT16 &&
1410 TID.Opcode != ARM::USAT16)) &&
1411 "saturate bit position out of range");
1412 Binary |= Pos << 16;
1415 Binary |= getMachineOpValue(MI, 2);
1417 // Encode shift_imm.
1418 if (TID.getNumOperands() == 4) {
1419 unsigned ShiftOp = MI.getOperand(3).getImm();
1420 ARM_AM::ShiftOpc Opc = ARM_AM::getSORegShOp(ShiftOp);
1421 if (Opc == ARM_AM::asr)
1423 unsigned ShiftAmt = MI.getOperand(3).getImm();
1424 if (ShiftAmt == 32 && Opc == ARM_AM::asr)
1426 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1427 Binary |= ShiftAmt << ARMII::ShiftShift;
1433 void ARMCodeEmitter::emitBranchInstruction(const MachineInstr &MI) {
1434 const TargetInstrDesc &TID = MI.getDesc();
1436 if (TID.Opcode == ARM::TPsoft) {
1437 llvm_unreachable("ARM::TPsoft FIXME"); // FIXME
1440 // Part of binary is determined by TableGn.
1441 unsigned Binary = getBinaryCodeForInstr(MI);
1443 // Set the conditional execution predicate
1444 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1446 // Set signed_immed_24 field
1447 Binary |= getMachineOpValue(MI, 0);
1452 void ARMCodeEmitter::emitInlineJumpTable(unsigned JTIndex) {
1453 // Remember the base address of the inline jump table.
1454 uintptr_t JTBase = MCE.getCurrentPCValue();
1455 JTI->addJumpTableBaseAddr(JTIndex, JTBase);
1456 DEBUG(errs() << " ** Jump Table #" << JTIndex << " @ " << (void*)JTBase
1459 // Now emit the jump table entries.
1460 const std::vector<MachineBasicBlock*> &MBBs = (*MJTEs)[JTIndex].MBBs;
1461 for (unsigned i = 0, e = MBBs.size(); i != e; ++i) {
1463 // DestBB address - JT base.
1464 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_pic_jt, JTBase);
1466 // Absolute DestBB address.
1467 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_absolute);
1472 void ARMCodeEmitter::emitMiscBranchInstruction(const MachineInstr &MI) {
1473 const TargetInstrDesc &TID = MI.getDesc();
1475 // Handle jump tables.
1476 if (TID.Opcode == ARM::BR_JTr || TID.Opcode == ARM::BR_JTadd) {
1477 // First emit a ldr pc, [] instruction.
1478 emitDataProcessingInstruction(MI, ARM::PC);
1480 // Then emit the inline jump table.
1482 (TID.Opcode == ARM::BR_JTr)
1483 ? MI.getOperand(1).getIndex() : MI.getOperand(2).getIndex();
1484 emitInlineJumpTable(JTIndex);
1486 } else if (TID.Opcode == ARM::BR_JTm) {
1487 // First emit a ldr pc, [] instruction.
1488 emitLoadStoreInstruction(MI, ARM::PC);
1490 // Then emit the inline jump table.
1491 emitInlineJumpTable(MI.getOperand(3).getIndex());
1495 // Part of binary is determined by TableGn.
1496 unsigned Binary = getBinaryCodeForInstr(MI);
1498 // Set the conditional execution predicate
1499 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1501 if (TID.Opcode == ARM::BX_RET || TID.Opcode == ARM::MOVPCLR)
1502 // The return register is LR.
1503 Binary |= getARMRegisterNumbering(ARM::LR);
1505 // otherwise, set the return register
1506 Binary |= getMachineOpValue(MI, 0);
1511 static unsigned encodeVFPRd(const MachineInstr &MI, unsigned OpIdx) {
1512 unsigned RegD = MI.getOperand(OpIdx).getReg();
1513 unsigned Binary = 0;
1514 bool isSPVFP = ARM::SPRRegisterClass->contains(RegD);
1515 RegD = getARMRegisterNumbering(RegD);
1517 Binary |= RegD << ARMII::RegRdShift;
1519 Binary |= ((RegD & 0x1E) >> 1) << ARMII::RegRdShift;
1520 Binary |= (RegD & 0x01) << ARMII::D_BitShift;
1525 static unsigned encodeVFPRn(const MachineInstr &MI, unsigned OpIdx) {
1526 unsigned RegN = MI.getOperand(OpIdx).getReg();
1527 unsigned Binary = 0;
1528 bool isSPVFP = ARM::SPRRegisterClass->contains(RegN);
1529 RegN = getARMRegisterNumbering(RegN);
1531 Binary |= RegN << ARMII::RegRnShift;
1533 Binary |= ((RegN & 0x1E) >> 1) << ARMII::RegRnShift;
1534 Binary |= (RegN & 0x01) << ARMII::N_BitShift;
1539 static unsigned encodeVFPRm(const MachineInstr &MI, unsigned OpIdx) {
1540 unsigned RegM = MI.getOperand(OpIdx).getReg();
1541 unsigned Binary = 0;
1542 bool isSPVFP = ARM::SPRRegisterClass->contains(RegM);
1543 RegM = getARMRegisterNumbering(RegM);
1547 Binary |= ((RegM & 0x1E) >> 1);
1548 Binary |= (RegM & 0x01) << ARMII::M_BitShift;
1553 void ARMCodeEmitter::emitVFPArithInstruction(const MachineInstr &MI) {
1554 const TargetInstrDesc &TID = MI.getDesc();
1556 // Part of binary is determined by TableGn.
1557 unsigned Binary = getBinaryCodeForInstr(MI);
1559 // Set the conditional execution predicate
1560 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1563 assert((Binary & ARMII::D_BitShift) == 0 &&
1564 (Binary & ARMII::N_BitShift) == 0 &&
1565 (Binary & ARMII::M_BitShift) == 0 && "VFP encoding bug!");
1568 Binary |= encodeVFPRd(MI, OpIdx++);
1570 // If this is a two-address operand, skip it, e.g. FMACD.
1571 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1575 if ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPBinaryFrm)
1576 Binary |= encodeVFPRn(MI, OpIdx++);
1578 if (OpIdx == TID.getNumOperands() ||
1579 TID.OpInfo[OpIdx].isPredicate() ||
1580 TID.OpInfo[OpIdx].isOptionalDef()) {
1581 // FCMPEZD etc. has only one operand.
1587 Binary |= encodeVFPRm(MI, OpIdx);
1592 void ARMCodeEmitter::emitVFPConversionInstruction(const MachineInstr &MI) {
1593 const TargetInstrDesc &TID = MI.getDesc();
1594 unsigned Form = TID.TSFlags & ARMII::FormMask;
1596 // Part of binary is determined by TableGn.
1597 unsigned Binary = getBinaryCodeForInstr(MI);
1599 // Set the conditional execution predicate
1600 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1604 case ARMII::VFPConv1Frm:
1605 case ARMII::VFPConv2Frm:
1606 case ARMII::VFPConv3Frm:
1608 Binary |= encodeVFPRd(MI, 0);
1610 case ARMII::VFPConv4Frm:
1612 Binary |= encodeVFPRn(MI, 0);
1614 case ARMII::VFPConv5Frm:
1616 Binary |= encodeVFPRm(MI, 0);
1622 case ARMII::VFPConv1Frm:
1624 Binary |= encodeVFPRm(MI, 1);
1626 case ARMII::VFPConv2Frm:
1627 case ARMII::VFPConv3Frm:
1629 Binary |= encodeVFPRn(MI, 1);
1631 case ARMII::VFPConv4Frm:
1632 case ARMII::VFPConv5Frm:
1634 Binary |= encodeVFPRd(MI, 1);
1638 if (Form == ARMII::VFPConv5Frm)
1640 Binary |= encodeVFPRn(MI, 2);
1641 else if (Form == ARMII::VFPConv3Frm)
1643 Binary |= encodeVFPRm(MI, 2);
1648 void ARMCodeEmitter::emitVFPLoadStoreInstruction(const MachineInstr &MI) {
1649 // Part of binary is determined by TableGn.
1650 unsigned Binary = getBinaryCodeForInstr(MI);
1652 // Set the conditional execution predicate
1653 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1658 Binary |= encodeVFPRd(MI, OpIdx++);
1660 // Encode address base.
1661 const MachineOperand &Base = MI.getOperand(OpIdx++);
1662 Binary |= getMachineOpValue(MI, Base) << ARMII::RegRnShift;
1664 // If there is a non-zero immediate offset, encode it.
1666 const MachineOperand &Offset = MI.getOperand(OpIdx);
1667 if (unsigned ImmOffs = ARM_AM::getAM5Offset(Offset.getImm())) {
1668 if (ARM_AM::getAM5Op(Offset.getImm()) == ARM_AM::add)
1669 Binary |= 1 << ARMII::U_BitShift;
1676 // If immediate offset is omitted, default to +0.
1677 Binary |= 1 << ARMII::U_BitShift;
1683 ARMCodeEmitter::emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI) {
1684 const TargetInstrDesc &TID = MI.getDesc();
1685 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1687 // Part of binary is determined by TableGn.
1688 unsigned Binary = getBinaryCodeForInstr(MI);
1690 // Set the conditional execution predicate
1691 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1693 // Skip operand 0 of an instruction with base register update.
1698 // Set base address operand
1699 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1701 // Set addressing mode by modifying bits U(23) and P(24)
1702 ARM_AM::AMSubMode Mode = ARM_AM::getLoadStoreMultipleSubMode(MI.getOpcode());
1703 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(Mode));
1707 Binary |= 0x1 << ARMII::W_BitShift;
1709 // First register is encoded in Dd.
1710 Binary |= encodeVFPRd(MI, OpIdx+2);
1712 // Count the number of registers.
1713 unsigned NumRegs = 1;
1714 for (unsigned i = OpIdx+3, e = MI.getNumOperands(); i != e; ++i) {
1715 const MachineOperand &MO = MI.getOperand(i);
1716 if (!MO.isReg() || MO.isImplicit())
1720 // Bit 8 will be set if <list> is consecutive 64-bit registers (e.g., D0)
1721 // Otherwise, it will be 0, in the case of 32-bit registers.
1723 Binary |= NumRegs * 2;
1730 static unsigned encodeNEONRd(const MachineInstr &MI, unsigned OpIdx) {
1731 unsigned RegD = MI.getOperand(OpIdx).getReg();
1732 unsigned Binary = 0;
1733 RegD = getARMRegisterNumbering(RegD);
1734 Binary |= (RegD & 0xf) << ARMII::RegRdShift;
1735 Binary |= ((RegD >> 4) & 1) << ARMII::D_BitShift;
1739 static unsigned encodeNEONRn(const MachineInstr &MI, unsigned OpIdx) {
1740 unsigned RegN = MI.getOperand(OpIdx).getReg();
1741 unsigned Binary = 0;
1742 RegN = getARMRegisterNumbering(RegN);
1743 Binary |= (RegN & 0xf) << ARMII::RegRnShift;
1744 Binary |= ((RegN >> 4) & 1) << ARMII::N_BitShift;
1748 static unsigned encodeNEONRm(const MachineInstr &MI, unsigned OpIdx) {
1749 unsigned RegM = MI.getOperand(OpIdx).getReg();
1750 unsigned Binary = 0;
1751 RegM = getARMRegisterNumbering(RegM);
1752 Binary |= (RegM & 0xf);
1753 Binary |= ((RegM >> 4) & 1) << ARMII::M_BitShift;
1757 /// convertNEONDataProcToThumb - Convert the ARM mode encoding for a NEON
1758 /// data-processing instruction to the corresponding Thumb encoding.
1759 static unsigned convertNEONDataProcToThumb(unsigned Binary) {
1760 assert((Binary & 0xfe000000) == 0xf2000000 &&
1761 "not an ARM NEON data-processing instruction");
1762 unsigned UBit = (Binary >> 24) & 1;
1763 return 0xef000000 | (UBit << 28) | (Binary & 0xffffff);
1766 void ARMCodeEmitter::emitNEONLaneInstruction(const MachineInstr &MI) {
1767 unsigned Binary = getBinaryCodeForInstr(MI);
1769 unsigned RegTOpIdx, RegNOpIdx, LnOpIdx;
1770 const TargetInstrDesc &TID = MI.getDesc();
1771 if ((TID.TSFlags & ARMII::FormMask) == ARMII::NGetLnFrm) {
1775 } else { // ARMII::NSetLnFrm
1781 // Set the conditional execution predicate
1782 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1784 unsigned RegT = MI.getOperand(RegTOpIdx).getReg();
1785 RegT = getARMRegisterNumbering(RegT);
1786 Binary |= (RegT << ARMII::RegRdShift);
1787 Binary |= encodeNEONRn(MI, RegNOpIdx);
1790 if ((Binary & (1 << 22)) != 0)
1791 LaneShift = 0; // 8-bit elements
1792 else if ((Binary & (1 << 5)) != 0)
1793 LaneShift = 1; // 16-bit elements
1795 LaneShift = 2; // 32-bit elements
1797 unsigned Lane = MI.getOperand(LnOpIdx).getImm() << LaneShift;
1798 unsigned Opc1 = Lane >> 2;
1799 unsigned Opc2 = Lane & 3;
1800 assert((Opc1 & 3) == 0 && "out-of-range lane number operand");
1801 Binary |= (Opc1 << 21);
1802 Binary |= (Opc2 << 5);
1807 void ARMCodeEmitter::emitNEONDupInstruction(const MachineInstr &MI) {
1808 unsigned Binary = getBinaryCodeForInstr(MI);
1810 // Set the conditional execution predicate
1811 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1813 unsigned RegT = MI.getOperand(1).getReg();
1814 RegT = getARMRegisterNumbering(RegT);
1815 Binary |= (RegT << ARMII::RegRdShift);
1816 Binary |= encodeNEONRn(MI, 0);
1820 void ARMCodeEmitter::emitNEON1RegModImmInstruction(const MachineInstr &MI) {
1821 unsigned Binary = getBinaryCodeForInstr(MI);
1822 // Destination register is encoded in Dd.
1823 Binary |= encodeNEONRd(MI, 0);
1824 // Immediate fields: Op, Cmode, I, Imm3, Imm4
1825 unsigned Imm = MI.getOperand(1).getImm();
1826 unsigned Op = (Imm >> 12) & 1;
1827 unsigned Cmode = (Imm >> 8) & 0xf;
1828 unsigned I = (Imm >> 7) & 1;
1829 unsigned Imm3 = (Imm >> 4) & 0x7;
1830 unsigned Imm4 = Imm & 0xf;
1831 Binary |= (I << 24) | (Imm3 << 16) | (Cmode << 8) | (Op << 5) | Imm4;
1833 Binary = convertNEONDataProcToThumb(Binary);
1837 void ARMCodeEmitter::emitNEON2RegInstruction(const MachineInstr &MI) {
1838 const TargetInstrDesc &TID = MI.getDesc();
1839 unsigned Binary = getBinaryCodeForInstr(MI);
1840 // Destination register is encoded in Dd; source register in Dm.
1842 Binary |= encodeNEONRd(MI, OpIdx++);
1843 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1845 Binary |= encodeNEONRm(MI, OpIdx);
1847 Binary = convertNEONDataProcToThumb(Binary);
1848 // FIXME: This does not handle VDUPfdf or VDUPfqf.
1852 void ARMCodeEmitter::emitNEON3RegInstruction(const MachineInstr &MI) {
1853 const TargetInstrDesc &TID = MI.getDesc();
1854 unsigned Binary = getBinaryCodeForInstr(MI);
1855 // Destination register is encoded in Dd; source registers in Dn and Dm.
1857 Binary |= encodeNEONRd(MI, OpIdx++);
1858 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1860 Binary |= encodeNEONRn(MI, OpIdx++);
1861 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1863 Binary |= encodeNEONRm(MI, OpIdx);
1865 Binary = convertNEONDataProcToThumb(Binary);
1866 // FIXME: This does not handle VMOVDneon or VMOVQ.
1870 #include "ARMGenCodeEmitter.inc"