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 getBranchTargetOpValue(const MachineInstr &MI, unsigned Op)
172 unsigned getCCOutOpValue(const MachineInstr &MI, unsigned Op)
174 unsigned getSOImmOpValue(const MachineInstr &MI, unsigned Op)
176 unsigned getT2SOImmOpValue(const MachineInstr &MI, unsigned Op)
178 unsigned getSORegOpValue(const MachineInstr &MI, unsigned Op)
180 unsigned getT2SORegOpValue(const MachineInstr &MI, unsigned Op)
182 unsigned getRotImmOpValue(const MachineInstr &MI, unsigned Op)
184 unsigned getImmMinusOneOpValue(const MachineInstr &MI, unsigned Op)
186 unsigned getAddrMode6AddressOpValue(const MachineInstr &MI, unsigned Op)
188 unsigned getAddrMode6OffsetOpValue(const MachineInstr &MI, unsigned Op)
190 unsigned getBitfieldInvertedMaskOpValue(const MachineInstr &MI,
191 unsigned Op) const { return 0; }
192 uint32_t getLdStmModeOpValue(const MachineInstr &MI, unsigned OpIdx)
194 uint32_t getLdStSORegOpValue(const MachineInstr &MI, unsigned OpIdx)
197 unsigned getAddrModeImm12OpValue(const MachineInstr &MI, unsigned Op)
200 // {12} = (U)nsigned (add == '1', sub == '0')
202 const MachineOperand &MO = MI.getOperand(Op);
203 const MachineOperand &MO1 = MI.getOperand(Op + 1);
205 emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry);
208 unsigned Reg = getARMRegisterNumbering(MO.getReg());
209 int32_t Imm12 = MO1.getImm();
211 Binary = Imm12 & 0xfff;
214 Binary |= (Reg << 13);
217 uint32_t getAddrMode2OpValue(const MachineInstr &MI, unsigned OpIdx)
219 uint32_t getAddrMode2OffsetOpValue(const MachineInstr &MI, unsigned OpIdx)
221 uint32_t getAddrMode3OffsetOpValue(const MachineInstr &MI, unsigned OpIdx)
223 uint32_t getAddrMode3OpValue(const MachineInstr &MI, unsigned Op) const
225 uint32_t getAddrMode5OpValue(const MachineInstr &MI, unsigned Op) const {
227 // {8} = (U)nsigned (add == '1', sub == '0')
229 const MachineOperand &MO = MI.getOperand(Op);
230 const MachineOperand &MO1 = MI.getOperand(Op + 1);
232 emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry);
235 unsigned Reg = getARMRegisterNumbering(MO.getReg());
236 int32_t Imm8 = MO1.getImm();
238 Binary = Imm8 & 0xff;
241 Binary |= (Reg << 9);
244 unsigned getNEONVcvtImm32OpValue(const MachineInstr &MI, unsigned Op)
247 unsigned getRegisterListOpValue(const MachineInstr &MI, unsigned Op)
250 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
251 /// machine operand requires relocation, record the relocation and return
253 unsigned getMovi32Value(const MachineInstr &MI,const MachineOperand &MO,
256 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
258 unsigned getShiftOp(unsigned Imm) const ;
260 /// Routines that handle operands which add machine relocations which are
261 /// fixed up by the relocation stage.
262 void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
263 bool MayNeedFarStub, bool Indirect,
264 intptr_t ACPV = 0) const;
265 void emitExternalSymbolAddress(const char *ES, unsigned Reloc) const;
266 void emitConstPoolAddress(unsigned CPI, unsigned Reloc) const;
267 void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const;
268 void emitMachineBasicBlock(MachineBasicBlock *BB, unsigned Reloc,
269 intptr_t JTBase = 0) const;
273 char ARMCodeEmitter::ID = 0;
275 /// createARMJITCodeEmitterPass - Return a pass that emits the collected ARM
276 /// code to the specified MCE object.
277 FunctionPass *llvm::createARMJITCodeEmitterPass(ARMBaseTargetMachine &TM,
278 JITCodeEmitter &JCE) {
279 return new ARMCodeEmitter(TM, JCE);
282 bool ARMCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
283 assert((MF.getTarget().getRelocationModel() != Reloc::Default ||
284 MF.getTarget().getRelocationModel() != Reloc::Static) &&
285 "JIT relocation model must be set to static or default!");
286 JTI = ((ARMTargetMachine &)MF.getTarget()).getJITInfo();
287 II = ((const ARMTargetMachine &)MF.getTarget()).getInstrInfo();
288 TD = ((const ARMTargetMachine &)MF.getTarget()).getTargetData();
289 Subtarget = &TM.getSubtarget<ARMSubtarget>();
290 MCPEs = &MF.getConstantPool()->getConstants();
292 if (MF.getJumpTableInfo()) MJTEs = &MF.getJumpTableInfo()->getJumpTables();
293 IsPIC = TM.getRelocationModel() == Reloc::PIC_;
294 IsThumb = MF.getInfo<ARMFunctionInfo>()->isThumbFunction();
295 JTI->Initialize(MF, IsPIC);
296 MMI = &getAnalysis<MachineModuleInfo>();
297 MCE.setModuleInfo(MMI);
300 DEBUG(errs() << "JITTing function '"
301 << MF.getFunction()->getName() << "'\n");
302 MCE.startFunction(MF);
303 for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
305 MCE.StartMachineBasicBlock(MBB);
306 for (MachineBasicBlock::const_iterator I = MBB->begin(), E = MBB->end();
310 } while (MCE.finishFunction(MF));
315 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
317 unsigned ARMCodeEmitter::getShiftOp(unsigned Imm) const {
318 switch (ARM_AM::getAM2ShiftOpc(Imm)) {
319 default: llvm_unreachable("Unknown shift opc!");
320 case ARM_AM::asr: return 2;
321 case ARM_AM::lsl: return 0;
322 case ARM_AM::lsr: return 1;
324 case ARM_AM::rrx: return 3;
329 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
330 /// machine operand requires relocation, record the relocation and return zero.
331 unsigned ARMCodeEmitter::getMovi32Value(const MachineInstr &MI,
332 const MachineOperand &MO,
334 assert(((Reloc == ARM::reloc_arm_movt) || (Reloc == ARM::reloc_arm_movw))
335 && "Relocation to this function should be for movt or movw");
338 return static_cast<unsigned>(MO.getImm());
339 else if (MO.isGlobal())
340 emitGlobalAddress(MO.getGlobal(), Reloc, true, false);
341 else if (MO.isSymbol())
342 emitExternalSymbolAddress(MO.getSymbolName(), Reloc);
344 emitMachineBasicBlock(MO.getMBB(), Reloc);
349 llvm_unreachable("Unsupported operand type for movw/movt");
354 /// getMachineOpValue - Return binary encoding of operand. If the machine
355 /// operand requires relocation, record the relocation and return zero.
356 unsigned ARMCodeEmitter::getMachineOpValue(const MachineInstr &MI,
357 const MachineOperand &MO) const {
359 return getARMRegisterNumbering(MO.getReg());
361 return static_cast<unsigned>(MO.getImm());
362 else if (MO.isGlobal())
363 emitGlobalAddress(MO.getGlobal(), ARM::reloc_arm_branch, true, false);
364 else if (MO.isSymbol())
365 emitExternalSymbolAddress(MO.getSymbolName(), ARM::reloc_arm_branch);
366 else if (MO.isCPI()) {
367 const TargetInstrDesc &TID = MI.getDesc();
368 // For VFP load, the immediate offset is multiplied by 4.
369 unsigned Reloc = ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPLdStFrm)
370 ? ARM::reloc_arm_vfp_cp_entry : ARM::reloc_arm_cp_entry;
371 emitConstPoolAddress(MO.getIndex(), Reloc);
372 } else if (MO.isJTI())
373 emitJumpTableAddress(MO.getIndex(), ARM::reloc_arm_relative);
375 emitMachineBasicBlock(MO.getMBB(), ARM::reloc_arm_branch);
385 /// emitGlobalAddress - Emit the specified address to the code stream.
387 void ARMCodeEmitter::emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
388 bool MayNeedFarStub, bool Indirect,
389 intptr_t ACPV) const {
390 MachineRelocation MR = Indirect
391 ? MachineRelocation::getIndirectSymbol(MCE.getCurrentPCOffset(), Reloc,
392 const_cast<GlobalValue *>(GV),
393 ACPV, MayNeedFarStub)
394 : MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc,
395 const_cast<GlobalValue *>(GV), ACPV,
397 MCE.addRelocation(MR);
400 /// emitExternalSymbolAddress - Arrange for the address of an external symbol to
401 /// be emitted to the current location in the function, and allow it to be PC
403 void ARMCodeEmitter::
404 emitExternalSymbolAddress(const char *ES, unsigned Reloc) const {
405 MCE.addRelocation(MachineRelocation::getExtSym(MCE.getCurrentPCOffset(),
409 /// emitConstPoolAddress - Arrange for the address of an constant pool
410 /// to be emitted to the current location in the function, and allow it to be PC
412 void ARMCodeEmitter::emitConstPoolAddress(unsigned CPI, unsigned Reloc) const {
413 // Tell JIT emitter we'll resolve the address.
414 MCE.addRelocation(MachineRelocation::getConstPool(MCE.getCurrentPCOffset(),
415 Reloc, CPI, 0, true));
418 /// emitJumpTableAddress - Arrange for the address of a jump table to
419 /// be emitted to the current location in the function, and allow it to be PC
421 void ARMCodeEmitter::
422 emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const {
423 MCE.addRelocation(MachineRelocation::getJumpTable(MCE.getCurrentPCOffset(),
424 Reloc, JTIndex, 0, true));
427 /// emitMachineBasicBlock - Emit the specified address basic block.
428 void ARMCodeEmitter::emitMachineBasicBlock(MachineBasicBlock *BB,
430 intptr_t JTBase) const {
431 MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(),
435 void ARMCodeEmitter::emitWordLE(unsigned Binary) {
436 DEBUG(errs() << " 0x";
437 errs().write_hex(Binary) << "\n");
438 MCE.emitWordLE(Binary);
441 void ARMCodeEmitter::emitDWordLE(uint64_t Binary) {
442 DEBUG(errs() << " 0x";
443 errs().write_hex(Binary) << "\n");
444 MCE.emitDWordLE(Binary);
447 void ARMCodeEmitter::emitInstruction(const MachineInstr &MI) {
448 DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << MI);
450 MCE.processDebugLoc(MI.getDebugLoc(), true);
452 ++NumEmitted; // Keep track of the # of mi's emitted
453 switch (MI.getDesc().TSFlags & ARMII::FormMask) {
455 llvm_unreachable("Unhandled instruction encoding format!");
459 if (MI.getOpcode() == ARM::LEApcrelJT) {
460 // Materialize jumptable address.
461 emitLEApcrelJTInstruction(MI);
464 llvm_unreachable("Unhandled instruction encoding!");
467 emitPseudoInstruction(MI);
470 case ARMII::DPSoRegFrm:
471 emitDataProcessingInstruction(MI);
475 emitLoadStoreInstruction(MI);
477 case ARMII::LdMiscFrm:
478 case ARMII::StMiscFrm:
479 emitMiscLoadStoreInstruction(MI);
481 case ARMII::LdStMulFrm:
482 emitLoadStoreMultipleInstruction(MI);
485 emitMulFrmInstruction(MI);
488 emitExtendInstruction(MI);
490 case ARMII::ArithMiscFrm:
491 emitMiscArithInstruction(MI);
494 emitSaturateInstruction(MI);
497 emitBranchInstruction(MI);
499 case ARMII::BrMiscFrm:
500 emitMiscBranchInstruction(MI);
503 case ARMII::VFPUnaryFrm:
504 case ARMII::VFPBinaryFrm:
505 emitVFPArithInstruction(MI);
507 case ARMII::VFPConv1Frm:
508 case ARMII::VFPConv2Frm:
509 case ARMII::VFPConv3Frm:
510 case ARMII::VFPConv4Frm:
511 case ARMII::VFPConv5Frm:
512 emitVFPConversionInstruction(MI);
514 case ARMII::VFPLdStFrm:
515 emitVFPLoadStoreInstruction(MI);
517 case ARMII::VFPLdStMulFrm:
518 emitVFPLoadStoreMultipleInstruction(MI);
521 // NEON instructions.
522 case ARMII::NGetLnFrm:
523 case ARMII::NSetLnFrm:
524 emitNEONLaneInstruction(MI);
527 emitNEONDupInstruction(MI);
529 case ARMII::N1RegModImmFrm:
530 emitNEON1RegModImmInstruction(MI);
532 case ARMII::N2RegFrm:
533 emitNEON2RegInstruction(MI);
535 case ARMII::N3RegFrm:
536 emitNEON3RegInstruction(MI);
539 MCE.processDebugLoc(MI.getDebugLoc(), false);
542 void ARMCodeEmitter::emitConstPoolInstruction(const MachineInstr &MI) {
543 unsigned CPI = MI.getOperand(0).getImm(); // CP instruction index.
544 unsigned CPIndex = MI.getOperand(1).getIndex(); // Actual cp entry index.
545 const MachineConstantPoolEntry &MCPE = (*MCPEs)[CPIndex];
547 // Remember the CONSTPOOL_ENTRY address for later relocation.
548 JTI->addConstantPoolEntryAddr(CPI, MCE.getCurrentPCValue());
550 // Emit constpool island entry. In most cases, the actual values will be
551 // resolved and relocated after code emission.
552 if (MCPE.isMachineConstantPoolEntry()) {
553 ARMConstantPoolValue *ACPV =
554 static_cast<ARMConstantPoolValue*>(MCPE.Val.MachineCPVal);
556 DEBUG(errs() << " ** ARM constant pool #" << CPI << " @ "
557 << (void*)MCE.getCurrentPCValue() << " " << *ACPV << '\n');
559 assert(ACPV->isGlobalValue() && "unsupported constant pool value");
560 const GlobalValue *GV = ACPV->getGV();
562 Reloc::Model RelocM = TM.getRelocationModel();
563 emitGlobalAddress(GV, ARM::reloc_arm_machine_cp_entry,
565 Subtarget->GVIsIndirectSymbol(GV, RelocM),
568 emitExternalSymbolAddress(ACPV->getSymbol(), ARM::reloc_arm_absolute);
572 const Constant *CV = MCPE.Val.ConstVal;
575 errs() << " ** Constant pool #" << CPI << " @ "
576 << (void*)MCE.getCurrentPCValue() << " ";
577 if (const Function *F = dyn_cast<Function>(CV))
578 errs() << F->getName();
584 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
585 emitGlobalAddress(GV, ARM::reloc_arm_absolute, isa<Function>(GV), false);
587 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
588 uint32_t Val = uint32_t(*CI->getValue().getRawData());
590 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
591 if (CFP->getType()->isFloatTy())
592 emitWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
593 else if (CFP->getType()->isDoubleTy())
594 emitDWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
596 llvm_unreachable("Unable to handle this constantpool entry!");
599 llvm_unreachable("Unable to handle this constantpool entry!");
604 void ARMCodeEmitter::emitMOVi32immInstruction(const MachineInstr &MI) {
605 const MachineOperand &MO0 = MI.getOperand(0);
606 const MachineOperand &MO1 = MI.getOperand(1);
608 // Emit the 'movw' instruction.
609 unsigned Binary = 0x30 << 20; // mov: Insts{27-20} = 0b00110000
611 unsigned Lo16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movw) & 0xFFFF;
613 // Set the conditional execution predicate.
614 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
617 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
619 // Encode imm16 as imm4:imm12
620 Binary |= Lo16 & 0xFFF; // Insts{11-0} = imm12
621 Binary |= ((Lo16 >> 12) & 0xF) << 16; // Insts{19-16} = imm4
624 unsigned Hi16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movt) >> 16;
625 // Emit the 'movt' instruction.
626 Binary = 0x34 << 20; // movt: Insts{27-20} = 0b00110100
628 // Set the conditional execution predicate.
629 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
632 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
634 // Encode imm16 as imm4:imm1, same as movw above.
635 Binary |= Hi16 & 0xFFF;
636 Binary |= ((Hi16 >> 12) & 0xF) << 16;
640 void ARMCodeEmitter::emitMOVi2piecesInstruction(const MachineInstr &MI) {
641 const MachineOperand &MO0 = MI.getOperand(0);
642 const MachineOperand &MO1 = MI.getOperand(1);
643 assert(MO1.isImm() && ARM_AM::isSOImmTwoPartVal(MO1.getImm()) &&
644 "Not a valid so_imm value!");
645 unsigned V1 = ARM_AM::getSOImmTwoPartFirst(MO1.getImm());
646 unsigned V2 = ARM_AM::getSOImmTwoPartSecond(MO1.getImm());
648 // Emit the 'mov' instruction.
649 unsigned Binary = 0xd << 21; // mov: Insts{24-21} = 0b1101
651 // Set the conditional execution predicate.
652 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
655 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
658 // Set bit I(25) to identify this is the immediate form of <shifter_op>
659 Binary |= 1 << ARMII::I_BitShift;
660 Binary |= getMachineSoImmOpValue(V1);
663 // Now the 'orr' instruction.
664 Binary = 0xc << 21; // orr: Insts{24-21} = 0b1100
666 // Set the conditional execution predicate.
667 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
670 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
673 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRnShift;
676 // Set bit I(25) to identify this is the immediate form of <shifter_op>
677 Binary |= 1 << ARMII::I_BitShift;
678 Binary |= getMachineSoImmOpValue(V2);
682 void ARMCodeEmitter::emitLEApcrelJTInstruction(const MachineInstr &MI) {
683 // It's basically add r, pc, (LJTI - $+8)
685 const TargetInstrDesc &TID = MI.getDesc();
687 // Emit the 'add' instruction.
688 unsigned Binary = 0x4 << 21; // add: Insts{24-21} = 0b0100
690 // Set the conditional execution predicate
691 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
693 // Encode S bit if MI modifies CPSR.
694 Binary |= getAddrModeSBit(MI, TID);
697 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
699 // Encode Rn which is PC.
700 Binary |= getARMRegisterNumbering(ARM::PC) << ARMII::RegRnShift;
702 // Encode the displacement.
703 Binary |= 1 << ARMII::I_BitShift;
704 emitJumpTableAddress(MI.getOperand(1).getIndex(), ARM::reloc_arm_jt_base);
709 void ARMCodeEmitter::emitPseudoMoveInstruction(const MachineInstr &MI) {
710 unsigned Opcode = MI.getDesc().Opcode;
712 // Part of binary is determined by TableGn.
713 unsigned Binary = getBinaryCodeForInstr(MI);
715 // Set the conditional execution predicate
716 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
718 // Encode S bit if MI modifies CPSR.
719 if (Opcode == ARM::MOVsrl_flag || Opcode == ARM::MOVsra_flag)
720 Binary |= 1 << ARMII::S_BitShift;
722 // Encode register def if there is one.
723 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
725 // Encode the shift operation.
732 case ARM::MOVsrl_flag:
734 Binary |= (0x2 << 4) | (1 << 7);
736 case ARM::MOVsra_flag:
738 Binary |= (0x4 << 4) | (1 << 7);
742 // Encode register Rm.
743 Binary |= getMachineOpValue(MI, 1);
748 void ARMCodeEmitter::addPCLabel(unsigned LabelID) {
749 DEBUG(errs() << " ** LPC" << LabelID << " @ "
750 << (void*)MCE.getCurrentPCValue() << '\n');
751 JTI->addPCLabelAddr(LabelID, MCE.getCurrentPCValue());
754 void ARMCodeEmitter::emitPseudoInstruction(const MachineInstr &MI) {
755 unsigned Opcode = MI.getDesc().Opcode;
758 llvm_unreachable("ARMCodeEmitter::emitPseudoInstruction");
762 case ARM::BMOVPCRXr9: {
763 // First emit mov lr, pc
764 unsigned Binary = 0x01a0e00f;
765 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
768 // and then emit the branch.
769 emitMiscBranchInstruction(MI);
772 case TargetOpcode::INLINEASM: {
773 // We allow inline assembler nodes with empty bodies - they can
774 // implicitly define registers, which is ok for JIT.
775 if (MI.getOperand(0).getSymbolName()[0]) {
776 report_fatal_error("JIT does not support inline asm!");
780 case TargetOpcode::PROLOG_LABEL:
781 case TargetOpcode::EH_LABEL:
782 MCE.emitLabel(MI.getOperand(0).getMCSymbol());
784 case TargetOpcode::IMPLICIT_DEF:
785 case TargetOpcode::KILL:
788 case ARM::CONSTPOOL_ENTRY:
789 emitConstPoolInstruction(MI);
792 // Remember of the address of the PC label for relocation later.
793 addPCLabel(MI.getOperand(2).getImm());
794 // PICADD is just an add instruction that implicitly read pc.
795 emitDataProcessingInstruction(MI, 0, ARM::PC);
802 // Remember of the address of the PC label for relocation later.
803 addPCLabel(MI.getOperand(2).getImm());
804 // These are just load / store instructions that implicitly read pc.
805 emitLoadStoreInstruction(MI, 0, ARM::PC);
812 // Remember of the address of the PC label for relocation later.
813 addPCLabel(MI.getOperand(2).getImm());
814 // These are just load / store instructions that implicitly read pc.
815 emitMiscLoadStoreInstruction(MI, ARM::PC);
820 // Two instructions to materialize a constant.
821 if (Subtarget->hasV6T2Ops())
822 emitMOVi32immInstruction(MI);
824 emitMOVi2piecesInstruction(MI);
827 case ARM::LEApcrelJT:
828 // Materialize jumptable address.
829 emitLEApcrelJTInstruction(MI);
832 case ARM::MOVsrl_flag:
833 case ARM::MOVsra_flag:
834 emitPseudoMoveInstruction(MI);
839 unsigned ARMCodeEmitter::getMachineSoRegOpValue(const MachineInstr &MI,
840 const TargetInstrDesc &TID,
841 const MachineOperand &MO,
843 unsigned Binary = getMachineOpValue(MI, MO);
845 const MachineOperand &MO1 = MI.getOperand(OpIdx + 1);
846 const MachineOperand &MO2 = MI.getOperand(OpIdx + 2);
847 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO2.getImm());
849 // Encode the shift opcode.
851 unsigned Rs = MO1.getReg();
853 // Set shift operand (bit[7:4]).
858 // RRX - 0110 and bit[11:8] clear.
860 default: llvm_unreachable("Unknown shift opc!");
861 case ARM_AM::lsl: SBits = 0x1; break;
862 case ARM_AM::lsr: SBits = 0x3; break;
863 case ARM_AM::asr: SBits = 0x5; break;
864 case ARM_AM::ror: SBits = 0x7; break;
865 case ARM_AM::rrx: SBits = 0x6; break;
868 // Set shift operand (bit[6:4]).
874 default: llvm_unreachable("Unknown shift opc!");
875 case ARM_AM::lsl: SBits = 0x0; break;
876 case ARM_AM::lsr: SBits = 0x2; break;
877 case ARM_AM::asr: SBits = 0x4; break;
878 case ARM_AM::ror: SBits = 0x6; break;
881 Binary |= SBits << 4;
882 if (SOpc == ARM_AM::rrx)
885 // Encode the shift operation Rs or shift_imm (except rrx).
887 // Encode Rs bit[11:8].
888 assert(ARM_AM::getSORegOffset(MO2.getImm()) == 0);
889 return Binary | (getARMRegisterNumbering(Rs) << ARMII::RegRsShift);
892 // Encode shift_imm bit[11:7].
893 return Binary | ARM_AM::getSORegOffset(MO2.getImm()) << 7;
896 unsigned ARMCodeEmitter::getMachineSoImmOpValue(unsigned SoImm) {
897 int SoImmVal = ARM_AM::getSOImmVal(SoImm);
898 assert(SoImmVal != -1 && "Not a valid so_imm value!");
900 // Encode rotate_imm.
901 unsigned Binary = (ARM_AM::getSOImmValRot((unsigned)SoImmVal) >> 1)
902 << ARMII::SoRotImmShift;
905 Binary |= ARM_AM::getSOImmValImm((unsigned)SoImmVal);
909 unsigned ARMCodeEmitter::getAddrModeSBit(const MachineInstr &MI,
910 const TargetInstrDesc &TID) const {
911 for (unsigned i = MI.getNumOperands(), e = TID.getNumOperands(); i != e; --i){
912 const MachineOperand &MO = MI.getOperand(i-1);
913 if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR)
914 return 1 << ARMII::S_BitShift;
919 void ARMCodeEmitter::emitDataProcessingInstruction(const MachineInstr &MI,
921 unsigned ImplicitRn) {
922 const TargetInstrDesc &TID = MI.getDesc();
924 // Part of binary is determined by TableGn.
925 unsigned Binary = getBinaryCodeForInstr(MI);
927 // Set the conditional execution predicate
928 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
930 // Encode S bit if MI modifies CPSR.
931 Binary |= getAddrModeSBit(MI, TID);
933 // Encode register def if there is one.
934 unsigned NumDefs = TID.getNumDefs();
937 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
939 // Special handling for implicit use (e.g. PC).
940 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
942 if (TID.Opcode == ARM::MOVi16) {
943 // Get immediate from MI.
944 unsigned Lo16 = getMovi32Value(MI, MI.getOperand(OpIdx),
945 ARM::reloc_arm_movw);
946 // Encode imm which is the same as in emitMOVi32immInstruction().
947 Binary |= Lo16 & 0xFFF;
948 Binary |= ((Lo16 >> 12) & 0xF) << 16;
951 } else if(TID.Opcode == ARM::MOVTi16) {
952 unsigned Hi16 = (getMovi32Value(MI, MI.getOperand(OpIdx),
953 ARM::reloc_arm_movt) >> 16);
954 Binary |= Hi16 & 0xFFF;
955 Binary |= ((Hi16 >> 12) & 0xF) << 16;
958 } else if ((TID.Opcode == ARM::BFC) || (TID.Opcode == ARM::BFI)) {
959 uint32_t v = ~MI.getOperand(2).getImm();
960 int32_t lsb = CountTrailingZeros_32(v);
961 int32_t msb = (32 - CountLeadingZeros_32(v)) - 1;
962 // Instr{20-16} = msb, Instr{11-7} = lsb
963 Binary |= (msb & 0x1F) << 16;
964 Binary |= (lsb & 0x1F) << 7;
967 } else if ((TID.Opcode == ARM::UBFX) || (TID.Opcode == ARM::SBFX)) {
968 // Encode Rn in Instr{0-3}
969 Binary |= getMachineOpValue(MI, OpIdx++);
971 uint32_t lsb = MI.getOperand(OpIdx++).getImm();
972 uint32_t widthm1 = MI.getOperand(OpIdx++).getImm() - 1;
974 // Instr{20-16} = widthm1, Instr{11-7} = lsb
975 Binary |= (widthm1 & 0x1F) << 16;
976 Binary |= (lsb & 0x1F) << 7;
981 // If this is a two-address operand, skip it. e.g. MOVCCr operand 1.
982 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
985 // Encode first non-shifter register operand if there is one.
986 bool isUnary = TID.TSFlags & ARMII::UnaryDP;
989 // Special handling for implicit use (e.g. PC).
990 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
992 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRnShift;
997 // Encode shifter operand.
998 const MachineOperand &MO = MI.getOperand(OpIdx);
999 if ((TID.TSFlags & ARMII::FormMask) == ARMII::DPSoRegFrm) {
1001 emitWordLE(Binary | getMachineSoRegOpValue(MI, TID, MO, OpIdx));
1006 // Encode register Rm.
1007 emitWordLE(Binary | getARMRegisterNumbering(MO.getReg()));
1012 Binary |= getMachineSoImmOpValue((unsigned)MO.getImm());
1017 void ARMCodeEmitter::emitLoadStoreInstruction(const MachineInstr &MI,
1018 unsigned ImplicitRd,
1019 unsigned ImplicitRn) {
1020 const TargetInstrDesc &TID = MI.getDesc();
1021 unsigned Form = TID.TSFlags & ARMII::FormMask;
1022 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1024 // Part of binary is determined by TableGn.
1025 unsigned Binary = getBinaryCodeForInstr(MI);
1027 // If this is an LDRi12, STRi12 or LDRcp, nothing more needs be done.
1028 if (MI.getOpcode() == ARM::LDRi12 || MI.getOpcode() == ARM::LDRcp ||
1029 MI.getOpcode() == ARM::STRi12) {
1034 // Set the conditional execution predicate
1035 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1039 // Operand 0 of a pre- and post-indexed store is the address base
1040 // writeback. Skip it.
1041 bool Skipped = false;
1042 if (IsPrePost && Form == ARMII::StFrm) {
1047 // Set first operand
1049 // Special handling for implicit use (e.g. PC).
1050 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
1052 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1054 // Set second operand
1056 // Special handling for implicit use (e.g. PC).
1057 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1059 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1061 // If this is a two-address operand, skip it. e.g. LDR_PRE.
1062 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1065 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1066 unsigned AM2Opc = (ImplicitRn == ARM::PC)
1067 ? 0 : MI.getOperand(OpIdx+1).getImm();
1069 // Set bit U(23) according to sign of immed value (positive or negative).
1070 Binary |= ((ARM_AM::getAM2Op(AM2Opc) == ARM_AM::add ? 1 : 0) <<
1072 if (!MO2.getReg()) { // is immediate
1073 if (ARM_AM::getAM2Offset(AM2Opc))
1074 // Set the value of offset_12 field
1075 Binary |= ARM_AM::getAM2Offset(AM2Opc);
1080 // Set bit I(25), because this is not in immediate encoding.
1081 Binary |= 1 << ARMII::I_BitShift;
1082 assert(TargetRegisterInfo::isPhysicalRegister(MO2.getReg()));
1083 // Set bit[3:0] to the corresponding Rm register
1084 Binary |= getARMRegisterNumbering(MO2.getReg());
1086 // If this instr is in scaled register offset/index instruction, set
1087 // shift_immed(bit[11:7]) and shift(bit[6:5]) fields.
1088 if (unsigned ShImm = ARM_AM::getAM2Offset(AM2Opc)) {
1089 Binary |= getShiftOp(AM2Opc) << ARMII::ShiftImmShift; // shift
1090 Binary |= ShImm << ARMII::ShiftShift; // shift_immed
1096 void ARMCodeEmitter::emitMiscLoadStoreInstruction(const MachineInstr &MI,
1097 unsigned ImplicitRn) {
1098 const TargetInstrDesc &TID = MI.getDesc();
1099 unsigned Form = TID.TSFlags & ARMII::FormMask;
1100 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1102 // Part of binary is determined by TableGn.
1103 unsigned Binary = getBinaryCodeForInstr(MI);
1105 // Set the conditional execution predicate
1106 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1110 // Operand 0 of a pre- and post-indexed store is the address base
1111 // writeback. Skip it.
1112 bool Skipped = false;
1113 if (IsPrePost && Form == ARMII::StMiscFrm) {
1118 // Set first operand
1119 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1121 // Skip LDRD and STRD's second operand.
1122 if (TID.Opcode == ARM::LDRD || TID.Opcode == ARM::STRD)
1125 // Set second operand
1127 // Special handling for implicit use (e.g. PC).
1128 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1130 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1132 // If this is a two-address operand, skip it. e.g. LDRH_POST.
1133 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1136 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1137 unsigned AM3Opc = (ImplicitRn == ARM::PC)
1138 ? 0 : MI.getOperand(OpIdx+1).getImm();
1140 // Set bit U(23) according to sign of immed value (positive or negative)
1141 Binary |= ((ARM_AM::getAM3Op(AM3Opc) == ARM_AM::add ? 1 : 0) <<
1144 // If this instr is in register offset/index encoding, set bit[3:0]
1145 // to the corresponding Rm register.
1147 Binary |= getARMRegisterNumbering(MO2.getReg());
1152 // This instr is in immediate offset/index encoding, set bit 22 to 1.
1153 Binary |= 1 << ARMII::AM3_I_BitShift;
1154 if (unsigned ImmOffs = ARM_AM::getAM3Offset(AM3Opc)) {
1156 Binary |= (ImmOffs >> 4) << ARMII::ImmHiShift; // immedH
1157 Binary |= (ImmOffs & 0xF); // immedL
1163 static unsigned getAddrModeUPBits(unsigned Mode) {
1164 unsigned Binary = 0;
1166 // Set addressing mode by modifying bits U(23) and P(24)
1167 // IA - Increment after - bit U = 1 and bit P = 0
1168 // IB - Increment before - bit U = 1 and bit P = 1
1169 // DA - Decrement after - bit U = 0 and bit P = 0
1170 // DB - Decrement before - bit U = 0 and bit P = 1
1172 default: llvm_unreachable("Unknown addressing sub-mode!");
1173 case ARM_AM::da: break;
1174 case ARM_AM::db: Binary |= 0x1 << ARMII::P_BitShift; break;
1175 case ARM_AM::ia: Binary |= 0x1 << ARMII::U_BitShift; break;
1176 case ARM_AM::ib: Binary |= 0x3 << ARMII::U_BitShift; break;
1182 void ARMCodeEmitter::emitLoadStoreMultipleInstruction(const MachineInstr &MI) {
1183 const TargetInstrDesc &TID = MI.getDesc();
1184 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1186 // Part of binary is determined by TableGn.
1187 unsigned Binary = getBinaryCodeForInstr(MI);
1189 // Set the conditional execution predicate
1190 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1192 // Skip operand 0 of an instruction with base register update.
1197 // Set base address operand
1198 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1200 // Set addressing mode by modifying bits U(23) and P(24)
1201 ARM_AM::AMSubMode Mode = ARM_AM::getLoadStoreMultipleSubMode(MI.getOpcode());
1202 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(Mode));
1206 Binary |= 0x1 << ARMII::W_BitShift;
1209 for (unsigned i = OpIdx+2, e = MI.getNumOperands(); i != e; ++i) {
1210 const MachineOperand &MO = MI.getOperand(i);
1211 if (!MO.isReg() || MO.isImplicit())
1213 unsigned RegNum = getARMRegisterNumbering(MO.getReg());
1214 assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
1216 Binary |= 0x1 << RegNum;
1222 void ARMCodeEmitter::emitMulFrmInstruction(const MachineInstr &MI) {
1223 const TargetInstrDesc &TID = MI.getDesc();
1225 // Part of binary is determined by TableGn.
1226 unsigned Binary = getBinaryCodeForInstr(MI);
1228 // Set the conditional execution predicate
1229 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1231 // Encode S bit if MI modifies CPSR.
1232 Binary |= getAddrModeSBit(MI, TID);
1234 // 32x32->64bit operations have two destination registers. The number
1235 // of register definitions will tell us if that's what we're dealing with.
1237 if (TID.getNumDefs() == 2)
1238 Binary |= getMachineOpValue (MI, OpIdx++) << ARMII::RegRdLoShift;
1241 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdHiShift;
1244 Binary |= getMachineOpValue(MI, OpIdx++);
1247 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRsShift;
1249 // Many multiple instructions (e.g. MLA) have three src operands. Encode
1250 // it as Rn (for multiply, that's in the same offset as RdLo.
1251 if (TID.getNumOperands() > OpIdx &&
1252 !TID.OpInfo[OpIdx].isPredicate() &&
1253 !TID.OpInfo[OpIdx].isOptionalDef())
1254 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRdLoShift;
1259 void ARMCodeEmitter::emitExtendInstruction(const MachineInstr &MI) {
1260 const TargetInstrDesc &TID = MI.getDesc();
1262 // Part of binary is determined by TableGn.
1263 unsigned Binary = getBinaryCodeForInstr(MI);
1265 // Set the conditional execution predicate
1266 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1271 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1273 const MachineOperand &MO1 = MI.getOperand(OpIdx++);
1274 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1276 // Two register operand form.
1278 Binary |= getMachineOpValue(MI, MO1) << ARMII::RegRnShift;
1281 Binary |= getMachineOpValue(MI, MO2);
1284 Binary |= getMachineOpValue(MI, MO1);
1287 // Encode rot imm (0, 8, 16, or 24) if it has a rotate immediate operand.
1288 if (MI.getOperand(OpIdx).isImm() &&
1289 !TID.OpInfo[OpIdx].isPredicate() &&
1290 !TID.OpInfo[OpIdx].isOptionalDef())
1291 Binary |= (getMachineOpValue(MI, OpIdx) / 8) << ARMII::ExtRotImmShift;
1296 void ARMCodeEmitter::emitMiscArithInstruction(const MachineInstr &MI) {
1297 const TargetInstrDesc &TID = MI.getDesc();
1299 // Part of binary is determined by TableGn.
1300 unsigned Binary = getBinaryCodeForInstr(MI);
1302 // Set the conditional execution predicate
1303 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1308 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1310 const MachineOperand &MO = MI.getOperand(OpIdx++);
1311 if (OpIdx == TID.getNumOperands() ||
1312 TID.OpInfo[OpIdx].isPredicate() ||
1313 TID.OpInfo[OpIdx].isOptionalDef()) {
1314 // Encode Rm and it's done.
1315 Binary |= getMachineOpValue(MI, MO);
1321 Binary |= getMachineOpValue(MI, MO) << ARMII::RegRnShift;
1324 Binary |= getMachineOpValue(MI, OpIdx++);
1326 // Encode shift_imm.
1327 unsigned ShiftAmt = MI.getOperand(OpIdx).getImm();
1328 if (TID.Opcode == ARM::PKHTB) {
1329 assert(ShiftAmt != 0 && "PKHTB shift_imm is 0!");
1333 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1334 Binary |= ShiftAmt << ARMII::ShiftShift;
1339 void ARMCodeEmitter::emitSaturateInstruction(const MachineInstr &MI) {
1340 const TargetInstrDesc &TID = MI.getDesc();
1342 // Part of binary is determined by TableGen.
1343 unsigned Binary = getBinaryCodeForInstr(MI);
1345 // Set the conditional execution predicate
1346 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1349 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
1351 // Encode saturate bit position.
1352 unsigned Pos = MI.getOperand(1).getImm();
1353 if (TID.Opcode == ARM::SSAT || TID.Opcode == ARM::SSAT16)
1355 assert((Pos < 16 || (Pos < 32 &&
1356 TID.Opcode != ARM::SSAT16 &&
1357 TID.Opcode != ARM::USAT16)) &&
1358 "saturate bit position out of range");
1359 Binary |= Pos << 16;
1362 Binary |= getMachineOpValue(MI, 2);
1364 // Encode shift_imm.
1365 if (TID.getNumOperands() == 4) {
1366 unsigned ShiftOp = MI.getOperand(3).getImm();
1367 ARM_AM::ShiftOpc Opc = ARM_AM::getSORegShOp(ShiftOp);
1368 if (Opc == ARM_AM::asr)
1370 unsigned ShiftAmt = MI.getOperand(3).getImm();
1371 if (ShiftAmt == 32 && Opc == ARM_AM::asr)
1373 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1374 Binary |= ShiftAmt << ARMII::ShiftShift;
1380 void ARMCodeEmitter::emitBranchInstruction(const MachineInstr &MI) {
1381 const TargetInstrDesc &TID = MI.getDesc();
1383 if (TID.Opcode == ARM::TPsoft) {
1384 llvm_unreachable("ARM::TPsoft FIXME"); // FIXME
1387 // Part of binary is determined by TableGn.
1388 unsigned Binary = getBinaryCodeForInstr(MI);
1390 // Set the conditional execution predicate
1391 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1393 // Set signed_immed_24 field
1394 Binary |= getMachineOpValue(MI, 0);
1399 void ARMCodeEmitter::emitInlineJumpTable(unsigned JTIndex) {
1400 // Remember the base address of the inline jump table.
1401 uintptr_t JTBase = MCE.getCurrentPCValue();
1402 JTI->addJumpTableBaseAddr(JTIndex, JTBase);
1403 DEBUG(errs() << " ** Jump Table #" << JTIndex << " @ " << (void*)JTBase
1406 // Now emit the jump table entries.
1407 const std::vector<MachineBasicBlock*> &MBBs = (*MJTEs)[JTIndex].MBBs;
1408 for (unsigned i = 0, e = MBBs.size(); i != e; ++i) {
1410 // DestBB address - JT base.
1411 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_pic_jt, JTBase);
1413 // Absolute DestBB address.
1414 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_absolute);
1419 void ARMCodeEmitter::emitMiscBranchInstruction(const MachineInstr &MI) {
1420 const TargetInstrDesc &TID = MI.getDesc();
1422 // Handle jump tables.
1423 if (TID.Opcode == ARM::BR_JTr || TID.Opcode == ARM::BR_JTadd) {
1424 // First emit a ldr pc, [] instruction.
1425 emitDataProcessingInstruction(MI, ARM::PC);
1427 // Then emit the inline jump table.
1429 (TID.Opcode == ARM::BR_JTr)
1430 ? MI.getOperand(1).getIndex() : MI.getOperand(2).getIndex();
1431 emitInlineJumpTable(JTIndex);
1433 } else if (TID.Opcode == ARM::BR_JTm) {
1434 // First emit a ldr pc, [] instruction.
1435 emitLoadStoreInstruction(MI, ARM::PC);
1437 // Then emit the inline jump table.
1438 emitInlineJumpTable(MI.getOperand(3).getIndex());
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 if (TID.Opcode == ARM::BX_RET || TID.Opcode == ARM::MOVPCLR)
1449 // The return register is LR.
1450 Binary |= getARMRegisterNumbering(ARM::LR);
1452 // otherwise, set the return register
1453 Binary |= getMachineOpValue(MI, 0);
1458 static unsigned encodeVFPRd(const MachineInstr &MI, unsigned OpIdx) {
1459 unsigned RegD = MI.getOperand(OpIdx).getReg();
1460 unsigned Binary = 0;
1461 bool isSPVFP = ARM::SPRRegisterClass->contains(RegD);
1462 RegD = getARMRegisterNumbering(RegD);
1464 Binary |= RegD << ARMII::RegRdShift;
1466 Binary |= ((RegD & 0x1E) >> 1) << ARMII::RegRdShift;
1467 Binary |= (RegD & 0x01) << ARMII::D_BitShift;
1472 static unsigned encodeVFPRn(const MachineInstr &MI, unsigned OpIdx) {
1473 unsigned RegN = MI.getOperand(OpIdx).getReg();
1474 unsigned Binary = 0;
1475 bool isSPVFP = ARM::SPRRegisterClass->contains(RegN);
1476 RegN = getARMRegisterNumbering(RegN);
1478 Binary |= RegN << ARMII::RegRnShift;
1480 Binary |= ((RegN & 0x1E) >> 1) << ARMII::RegRnShift;
1481 Binary |= (RegN & 0x01) << ARMII::N_BitShift;
1486 static unsigned encodeVFPRm(const MachineInstr &MI, unsigned OpIdx) {
1487 unsigned RegM = MI.getOperand(OpIdx).getReg();
1488 unsigned Binary = 0;
1489 bool isSPVFP = ARM::SPRRegisterClass->contains(RegM);
1490 RegM = getARMRegisterNumbering(RegM);
1494 Binary |= ((RegM & 0x1E) >> 1);
1495 Binary |= (RegM & 0x01) << ARMII::M_BitShift;
1500 void ARMCodeEmitter::emitVFPArithInstruction(const MachineInstr &MI) {
1501 const TargetInstrDesc &TID = MI.getDesc();
1503 // Part of binary is determined by TableGn.
1504 unsigned Binary = getBinaryCodeForInstr(MI);
1506 // Set the conditional execution predicate
1507 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1510 assert((Binary & ARMII::D_BitShift) == 0 &&
1511 (Binary & ARMII::N_BitShift) == 0 &&
1512 (Binary & ARMII::M_BitShift) == 0 && "VFP encoding bug!");
1515 Binary |= encodeVFPRd(MI, OpIdx++);
1517 // If this is a two-address operand, skip it, e.g. FMACD.
1518 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1522 if ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPBinaryFrm)
1523 Binary |= encodeVFPRn(MI, OpIdx++);
1525 if (OpIdx == TID.getNumOperands() ||
1526 TID.OpInfo[OpIdx].isPredicate() ||
1527 TID.OpInfo[OpIdx].isOptionalDef()) {
1528 // FCMPEZD etc. has only one operand.
1534 Binary |= encodeVFPRm(MI, OpIdx);
1539 void ARMCodeEmitter::emitVFPConversionInstruction(const MachineInstr &MI) {
1540 const TargetInstrDesc &TID = MI.getDesc();
1541 unsigned Form = TID.TSFlags & ARMII::FormMask;
1543 // Part of binary is determined by TableGn.
1544 unsigned Binary = getBinaryCodeForInstr(MI);
1546 // Set the conditional execution predicate
1547 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1551 case ARMII::VFPConv1Frm:
1552 case ARMII::VFPConv2Frm:
1553 case ARMII::VFPConv3Frm:
1555 Binary |= encodeVFPRd(MI, 0);
1557 case ARMII::VFPConv4Frm:
1559 Binary |= encodeVFPRn(MI, 0);
1561 case ARMII::VFPConv5Frm:
1563 Binary |= encodeVFPRm(MI, 0);
1569 case ARMII::VFPConv1Frm:
1571 Binary |= encodeVFPRm(MI, 1);
1573 case ARMII::VFPConv2Frm:
1574 case ARMII::VFPConv3Frm:
1576 Binary |= encodeVFPRn(MI, 1);
1578 case ARMII::VFPConv4Frm:
1579 case ARMII::VFPConv5Frm:
1581 Binary |= encodeVFPRd(MI, 1);
1585 if (Form == ARMII::VFPConv5Frm)
1587 Binary |= encodeVFPRn(MI, 2);
1588 else if (Form == ARMII::VFPConv3Frm)
1590 Binary |= encodeVFPRm(MI, 2);
1595 void ARMCodeEmitter::emitVFPLoadStoreInstruction(const MachineInstr &MI) {
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;
1605 Binary |= encodeVFPRd(MI, OpIdx++);
1607 // Encode address base.
1608 const MachineOperand &Base = MI.getOperand(OpIdx++);
1609 Binary |= getMachineOpValue(MI, Base) << ARMII::RegRnShift;
1611 // If there is a non-zero immediate offset, encode it.
1613 const MachineOperand &Offset = MI.getOperand(OpIdx);
1614 if (unsigned ImmOffs = ARM_AM::getAM5Offset(Offset.getImm())) {
1615 if (ARM_AM::getAM5Op(Offset.getImm()) == ARM_AM::add)
1616 Binary |= 1 << ARMII::U_BitShift;
1623 // If immediate offset is omitted, default to +0.
1624 Binary |= 1 << ARMII::U_BitShift;
1630 ARMCodeEmitter::emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI) {
1631 const TargetInstrDesc &TID = MI.getDesc();
1632 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1634 // Part of binary is determined by TableGn.
1635 unsigned Binary = getBinaryCodeForInstr(MI);
1637 // Set the conditional execution predicate
1638 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1640 // Skip operand 0 of an instruction with base register update.
1645 // Set base address operand
1646 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1648 // Set addressing mode by modifying bits U(23) and P(24)
1649 ARM_AM::AMSubMode Mode = ARM_AM::getLoadStoreMultipleSubMode(MI.getOpcode());
1650 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(Mode));
1654 Binary |= 0x1 << ARMII::W_BitShift;
1656 // First register is encoded in Dd.
1657 Binary |= encodeVFPRd(MI, OpIdx+2);
1659 // Count the number of registers.
1660 unsigned NumRegs = 1;
1661 for (unsigned i = OpIdx+3, e = MI.getNumOperands(); i != e; ++i) {
1662 const MachineOperand &MO = MI.getOperand(i);
1663 if (!MO.isReg() || MO.isImplicit())
1667 // Bit 8 will be set if <list> is consecutive 64-bit registers (e.g., D0)
1668 // Otherwise, it will be 0, in the case of 32-bit registers.
1670 Binary |= NumRegs * 2;
1677 static unsigned encodeNEONRd(const MachineInstr &MI, unsigned OpIdx) {
1678 unsigned RegD = MI.getOperand(OpIdx).getReg();
1679 unsigned Binary = 0;
1680 RegD = getARMRegisterNumbering(RegD);
1681 Binary |= (RegD & 0xf) << ARMII::RegRdShift;
1682 Binary |= ((RegD >> 4) & 1) << ARMII::D_BitShift;
1686 static unsigned encodeNEONRn(const MachineInstr &MI, unsigned OpIdx) {
1687 unsigned RegN = MI.getOperand(OpIdx).getReg();
1688 unsigned Binary = 0;
1689 RegN = getARMRegisterNumbering(RegN);
1690 Binary |= (RegN & 0xf) << ARMII::RegRnShift;
1691 Binary |= ((RegN >> 4) & 1) << ARMII::N_BitShift;
1695 static unsigned encodeNEONRm(const MachineInstr &MI, unsigned OpIdx) {
1696 unsigned RegM = MI.getOperand(OpIdx).getReg();
1697 unsigned Binary = 0;
1698 RegM = getARMRegisterNumbering(RegM);
1699 Binary |= (RegM & 0xf);
1700 Binary |= ((RegM >> 4) & 1) << ARMII::M_BitShift;
1704 /// convertNEONDataProcToThumb - Convert the ARM mode encoding for a NEON
1705 /// data-processing instruction to the corresponding Thumb encoding.
1706 static unsigned convertNEONDataProcToThumb(unsigned Binary) {
1707 assert((Binary & 0xfe000000) == 0xf2000000 &&
1708 "not an ARM NEON data-processing instruction");
1709 unsigned UBit = (Binary >> 24) & 1;
1710 return 0xef000000 | (UBit << 28) | (Binary & 0xffffff);
1713 void ARMCodeEmitter::emitNEONLaneInstruction(const MachineInstr &MI) {
1714 unsigned Binary = getBinaryCodeForInstr(MI);
1716 unsigned RegTOpIdx, RegNOpIdx, LnOpIdx;
1717 const TargetInstrDesc &TID = MI.getDesc();
1718 if ((TID.TSFlags & ARMII::FormMask) == ARMII::NGetLnFrm) {
1722 } else { // ARMII::NSetLnFrm
1728 // Set the conditional execution predicate
1729 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1731 unsigned RegT = MI.getOperand(RegTOpIdx).getReg();
1732 RegT = getARMRegisterNumbering(RegT);
1733 Binary |= (RegT << ARMII::RegRdShift);
1734 Binary |= encodeNEONRn(MI, RegNOpIdx);
1737 if ((Binary & (1 << 22)) != 0)
1738 LaneShift = 0; // 8-bit elements
1739 else if ((Binary & (1 << 5)) != 0)
1740 LaneShift = 1; // 16-bit elements
1742 LaneShift = 2; // 32-bit elements
1744 unsigned Lane = MI.getOperand(LnOpIdx).getImm() << LaneShift;
1745 unsigned Opc1 = Lane >> 2;
1746 unsigned Opc2 = Lane & 3;
1747 assert((Opc1 & 3) == 0 && "out-of-range lane number operand");
1748 Binary |= (Opc1 << 21);
1749 Binary |= (Opc2 << 5);
1754 void ARMCodeEmitter::emitNEONDupInstruction(const MachineInstr &MI) {
1755 unsigned Binary = getBinaryCodeForInstr(MI);
1757 // Set the conditional execution predicate
1758 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1760 unsigned RegT = MI.getOperand(1).getReg();
1761 RegT = getARMRegisterNumbering(RegT);
1762 Binary |= (RegT << ARMII::RegRdShift);
1763 Binary |= encodeNEONRn(MI, 0);
1767 void ARMCodeEmitter::emitNEON1RegModImmInstruction(const MachineInstr &MI) {
1768 unsigned Binary = getBinaryCodeForInstr(MI);
1769 // Destination register is encoded in Dd.
1770 Binary |= encodeNEONRd(MI, 0);
1771 // Immediate fields: Op, Cmode, I, Imm3, Imm4
1772 unsigned Imm = MI.getOperand(1).getImm();
1773 unsigned Op = (Imm >> 12) & 1;
1774 unsigned Cmode = (Imm >> 8) & 0xf;
1775 unsigned I = (Imm >> 7) & 1;
1776 unsigned Imm3 = (Imm >> 4) & 0x7;
1777 unsigned Imm4 = Imm & 0xf;
1778 Binary |= (I << 24) | (Imm3 << 16) | (Cmode << 8) | (Op << 5) | Imm4;
1780 Binary = convertNEONDataProcToThumb(Binary);
1784 void ARMCodeEmitter::emitNEON2RegInstruction(const MachineInstr &MI) {
1785 const TargetInstrDesc &TID = MI.getDesc();
1786 unsigned Binary = getBinaryCodeForInstr(MI);
1787 // Destination register is encoded in Dd; source register in Dm.
1789 Binary |= encodeNEONRd(MI, OpIdx++);
1790 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1792 Binary |= encodeNEONRm(MI, OpIdx);
1794 Binary = convertNEONDataProcToThumb(Binary);
1795 // FIXME: This does not handle VDUPfdf or VDUPfqf.
1799 void ARMCodeEmitter::emitNEON3RegInstruction(const MachineInstr &MI) {
1800 const TargetInstrDesc &TID = MI.getDesc();
1801 unsigned Binary = getBinaryCodeForInstr(MI);
1802 // Destination register is encoded in Dd; source registers in Dn and Dm.
1804 Binary |= encodeNEONRd(MI, OpIdx++);
1805 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1807 Binary |= encodeNEONRn(MI, OpIdx++);
1808 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1810 Binary |= encodeNEONRm(MI, OpIdx);
1812 Binary = convertNEONDataProcToThumb(Binary);
1813 // FIXME: This does not handle VMOVDneon or VMOVQ.
1817 #include "ARMGenCodeEmitter.inc"