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 //===----------------------------------------------------------------------===//
16 #include "ARMBaseInstrInfo.h"
17 #include "ARMConstantPoolValue.h"
18 #include "ARMMachineFunctionInfo.h"
19 #include "ARMRelocations.h"
20 #include "ARMSubtarget.h"
21 #include "ARMTargetMachine.h"
22 #include "MCTargetDesc/ARMAddressingModes.h"
23 #include "llvm/ADT/Statistic.h"
24 #include "llvm/CodeGen/JITCodeEmitter.h"
25 #include "llvm/CodeGen/MachineConstantPool.h"
26 #include "llvm/CodeGen/MachineFunctionPass.h"
27 #include "llvm/CodeGen/MachineInstr.h"
28 #include "llvm/CodeGen/MachineJumpTableInfo.h"
29 #include "llvm/CodeGen/MachineModuleInfo.h"
30 #include "llvm/CodeGen/Passes.h"
31 #include "llvm/IR/Constants.h"
32 #include "llvm/IR/DerivedTypes.h"
33 #include "llvm/IR/Function.h"
34 #include "llvm/PassManager.h"
35 #include "llvm/Support/Debug.h"
36 #include "llvm/Support/ErrorHandling.h"
37 #include "llvm/Support/raw_ostream.h"
43 #define DEBUG_TYPE "jit"
45 STATISTIC(NumEmitted, "Number of machine instructions emitted");
49 class ARMCodeEmitter : public MachineFunctionPass {
51 const ARMBaseInstrInfo *II;
53 const ARMSubtarget *Subtarget;
56 MachineModuleInfo *MMI;
57 const std::vector<MachineConstantPoolEntry> *MCPEs;
58 const std::vector<MachineJumpTableEntry> *MJTEs;
62 void getAnalysisUsage(AnalysisUsage &AU) const override {
63 AU.addRequired<MachineModuleInfo>();
64 MachineFunctionPass::getAnalysisUsage(AU);
69 ARMCodeEmitter(TargetMachine &tm, JITCodeEmitter &mce)
70 : MachineFunctionPass(ID), JTI(nullptr),
71 II((const ARMBaseInstrInfo *)tm.getInstrInfo()),
72 TD(tm.getDataLayout()), TM(tm),
73 MCE(mce), MCPEs(nullptr), MJTEs(nullptr),
74 IsPIC(TM.getRelocationModel() == Reloc::PIC_), IsThumb(false) {}
76 /// getBinaryCodeForInstr - This function, generated by the
77 /// CodeEmitterGenerator using TableGen, produces the binary encoding for
78 /// machine instructions.
79 uint64_t getBinaryCodeForInstr(const MachineInstr &MI) const;
81 bool runOnMachineFunction(MachineFunction &MF) override;
83 const char *getPassName() const override {
84 return "ARM Machine Code Emitter";
87 void emitInstruction(const MachineInstr &MI);
91 void emitWordLE(unsigned Binary);
92 void emitDWordLE(uint64_t Binary);
93 void emitConstPoolInstruction(const MachineInstr &MI);
94 void emitMOVi32immInstruction(const MachineInstr &MI);
95 void emitMOVi2piecesInstruction(const MachineInstr &MI);
96 void emitLEApcrelJTInstruction(const MachineInstr &MI);
97 void emitPseudoMoveInstruction(const MachineInstr &MI);
98 void addPCLabel(unsigned LabelID);
99 void emitPseudoInstruction(const MachineInstr &MI);
100 unsigned getMachineSoRegOpValue(const MachineInstr &MI,
101 const MCInstrDesc &MCID,
102 const MachineOperand &MO,
105 unsigned getMachineSoImmOpValue(unsigned SoImm);
106 unsigned getAddrModeSBit(const MachineInstr &MI,
107 const MCInstrDesc &MCID) const;
109 void emitDataProcessingInstruction(const MachineInstr &MI,
110 unsigned ImplicitRd = 0,
111 unsigned ImplicitRn = 0);
113 void emitLoadStoreInstruction(const MachineInstr &MI,
114 unsigned ImplicitRd = 0,
115 unsigned ImplicitRn = 0);
117 void emitMiscLoadStoreInstruction(const MachineInstr &MI,
118 unsigned ImplicitRn = 0);
120 void emitLoadStoreMultipleInstruction(const MachineInstr &MI);
122 void emitMulFrmInstruction(const MachineInstr &MI);
124 void emitExtendInstruction(const MachineInstr &MI);
126 void emitMiscArithInstruction(const MachineInstr &MI);
128 void emitSaturateInstruction(const MachineInstr &MI);
130 void emitBranchInstruction(const MachineInstr &MI);
132 void emitInlineJumpTable(unsigned JTIndex);
134 void emitMiscBranchInstruction(const MachineInstr &MI);
136 void emitVFPArithInstruction(const MachineInstr &MI);
138 void emitVFPConversionInstruction(const MachineInstr &MI);
140 void emitVFPLoadStoreInstruction(const MachineInstr &MI);
142 void emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI);
144 void emitNEONLaneInstruction(const MachineInstr &MI);
145 void emitNEONDupInstruction(const MachineInstr &MI);
146 void emitNEON1RegModImmInstruction(const MachineInstr &MI);
147 void emitNEON2RegInstruction(const MachineInstr &MI);
148 void emitNEON3RegInstruction(const MachineInstr &MI);
150 /// getMachineOpValue - Return binary encoding of operand. If the machine
151 /// operand requires relocation, record the relocation and return zero.
152 unsigned getMachineOpValue(const MachineInstr &MI,
153 const MachineOperand &MO) const;
154 unsigned getMachineOpValue(const MachineInstr &MI, unsigned OpIdx) const {
155 return getMachineOpValue(MI, MI.getOperand(OpIdx));
158 // FIXME: The legacy JIT ARMCodeEmitter doesn't rely on the the
159 // TableGen'erated getBinaryCodeForInstr() function to encode any
160 // operand values, instead querying getMachineOpValue() directly for
161 // each operand it needs to encode. Thus, any of the new encoder
162 // helper functions can simply return 0 as the values the return
163 // are already handled elsewhere. They are placeholders to allow this
164 // encoder to continue to function until the MC encoder is sufficiently
165 // far along that this one can be eliminated entirely.
166 unsigned NEONThumb2DataIPostEncoder(const MachineInstr &MI, unsigned Val)
168 unsigned NEONThumb2LoadStorePostEncoder(const MachineInstr &MI,unsigned Val)
170 unsigned NEONThumb2DupPostEncoder(const MachineInstr &MI,unsigned Val)
172 unsigned NEONThumb2V8PostEncoder(const MachineInstr &MI,unsigned Val)
174 unsigned VFPThumb2PostEncoder(const MachineInstr&MI, unsigned Val)
176 unsigned getAdrLabelOpValue(const MachineInstr &MI, unsigned Op)
178 unsigned getThumbAdrLabelOpValue(const MachineInstr &MI, unsigned Op)
180 unsigned getThumbBLTargetOpValue(const MachineInstr &MI, unsigned Op)
182 unsigned getThumbBLXTargetOpValue(const MachineInstr &MI, unsigned Op)
184 unsigned getThumbBRTargetOpValue(const MachineInstr &MI, unsigned Op)
186 unsigned getThumbBCCTargetOpValue(const MachineInstr &MI, unsigned Op)
188 unsigned getThumbCBTargetOpValue(const MachineInstr &MI, unsigned Op)
190 unsigned getBranchTargetOpValue(const MachineInstr &MI, unsigned Op)
192 unsigned getUnconditionalBranchTargetOpValue(const MachineInstr &MI,
193 unsigned Op) const { return 0; }
194 unsigned getARMBranchTargetOpValue(const MachineInstr &MI, unsigned Op)
196 unsigned getARMBLTargetOpValue(const MachineInstr &MI, unsigned Op)
198 unsigned getARMBLXTargetOpValue(const MachineInstr &MI, unsigned Op)
200 unsigned getCCOutOpValue(const MachineInstr &MI, unsigned Op)
202 unsigned getSOImmOpValue(const MachineInstr &MI, unsigned Op)
204 unsigned getT2SOImmOpValue(const MachineInstr &MI, unsigned Op)
206 unsigned getSORegRegOpValue(const MachineInstr &MI, unsigned Op)
208 unsigned getSORegImmOpValue(const MachineInstr &MI, unsigned Op)
210 unsigned getThumbAddrModeRegRegOpValue(const MachineInstr &MI, unsigned Op)
212 unsigned getT2AddrModeImm8OpValue(const MachineInstr &MI, unsigned Op)
214 unsigned getT2Imm8s4OpValue(const MachineInstr &MI, unsigned Op)
216 unsigned getT2AddrModeImm8s4OpValue(const MachineInstr &MI, unsigned Op)
218 unsigned getT2AddrModeImm0_1020s4OpValue(const MachineInstr &MI,unsigned Op)
220 unsigned getT2AddrModeImm8OffsetOpValue(const MachineInstr &MI, unsigned Op)
222 unsigned getT2AddrModeSORegOpValue(const MachineInstr &MI, unsigned Op)
224 unsigned getT2SORegOpValue(const MachineInstr &MI, unsigned Op)
226 unsigned getT2AdrLabelOpValue(const MachineInstr &MI, unsigned Op)
228 unsigned getAddrMode6AddressOpValue(const MachineInstr &MI, unsigned Op)
230 unsigned getAddrMode6OneLane32AddressOpValue(const MachineInstr &MI,
233 unsigned getAddrMode6DupAddressOpValue(const MachineInstr &MI, unsigned Op)
235 unsigned getAddrMode6OffsetOpValue(const MachineInstr &MI, unsigned Op)
237 unsigned getBitfieldInvertedMaskOpValue(const MachineInstr &MI,
238 unsigned Op) const { return 0; }
239 uint32_t getLdStSORegOpValue(const MachineInstr &MI, unsigned OpIdx)
242 unsigned getAddrModeImm12OpValue(const MachineInstr &MI, unsigned Op)
245 // {12} = (U)nsigned (add == '1', sub == '0')
247 const MachineOperand &MO = MI.getOperand(Op);
248 const MachineOperand &MO1 = MI.getOperand(Op + 1);
250 emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry);
253 unsigned Reg = II->getRegisterInfo().getEncodingValue(MO.getReg());
254 int32_t Imm12 = MO1.getImm();
256 Binary = Imm12 & 0xfff;
259 Binary |= (Reg << 13);
263 unsigned getHiLo16ImmOpValue(const MachineInstr &MI, unsigned Op) const {
267 uint32_t getAddrMode2OffsetOpValue(const MachineInstr &MI, unsigned OpIdx)
269 uint32_t getPostIdxRegOpValue(const MachineInstr &MI, unsigned OpIdx)
271 uint32_t getAddrMode3OffsetOpValue(const MachineInstr &MI, unsigned OpIdx)
273 uint32_t getAddrMode3OpValue(const MachineInstr &MI, unsigned Op)
275 uint32_t getAddrModeThumbSPOpValue(const MachineInstr &MI, unsigned Op)
277 uint32_t getAddrModeISOpValue(const MachineInstr &MI, unsigned Op)
279 uint32_t getAddrModePCOpValue(const MachineInstr &MI, unsigned Op)
281 uint32_t getAddrMode5OpValue(const MachineInstr &MI, unsigned Op) const {
283 // {12} = (U)nsigned (add == '1', sub == '0')
285 const MachineOperand &MO = MI.getOperand(Op);
286 const MachineOperand &MO1 = MI.getOperand(Op + 1);
288 emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry);
291 unsigned Reg = II->getRegisterInfo().getEncodingValue(MO.getReg());
292 int32_t Imm12 = MO1.getImm();
294 // Special value for #-0
295 if (Imm12 == INT32_MIN)
298 // Immediate is always encoded as positive. The 'U' bit controls add vs
306 uint32_t Binary = Imm12 & 0xfff;
309 Binary |= (Reg << 13);
312 unsigned getNEONVcvtImm32OpValue(const MachineInstr &MI, unsigned Op)
315 unsigned getRegisterListOpValue(const MachineInstr &MI, unsigned Op)
318 unsigned getShiftRight8Imm(const MachineInstr &MI, unsigned Op)
320 unsigned getShiftRight16Imm(const MachineInstr &MI, unsigned Op)
322 unsigned getShiftRight32Imm(const MachineInstr &MI, unsigned Op)
324 unsigned getShiftRight64Imm(const MachineInstr &MI, unsigned Op)
327 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
328 /// machine operand requires relocation, record the relocation and return
330 unsigned getMovi32Value(const MachineInstr &MI,const MachineOperand &MO,
333 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
335 unsigned getShiftOp(unsigned Imm) const ;
337 /// Routines that handle operands which add machine relocations which are
338 /// fixed up by the relocation stage.
339 void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
340 bool MayNeedFarStub, bool Indirect,
341 intptr_t ACPV = 0) const;
342 void emitExternalSymbolAddress(const char *ES, unsigned Reloc) const;
343 void emitConstPoolAddress(unsigned CPI, unsigned Reloc) const;
344 void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const;
345 void emitMachineBasicBlock(MachineBasicBlock *BB, unsigned Reloc,
346 intptr_t JTBase = 0) const;
347 unsigned encodeVFPRd(const MachineInstr &MI, unsigned OpIdx) const;
348 unsigned encodeVFPRn(const MachineInstr &MI, unsigned OpIdx) const;
349 unsigned encodeVFPRm(const MachineInstr &MI, unsigned OpIdx) const;
350 unsigned encodeNEONRd(const MachineInstr &MI, unsigned OpIdx) const;
351 unsigned encodeNEONRn(const MachineInstr &MI, unsigned OpIdx) const;
352 unsigned encodeNEONRm(const MachineInstr &MI, unsigned OpIdx) const;
356 char ARMCodeEmitter::ID = 0;
358 /// createARMJITCodeEmitterPass - Return a pass that emits the collected ARM
359 /// code to the specified MCE object.
360 FunctionPass *llvm::createARMJITCodeEmitterPass(ARMBaseTargetMachine &TM,
361 JITCodeEmitter &JCE) {
362 return new ARMCodeEmitter(TM, JCE);
365 bool ARMCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
366 TargetMachine &Target = const_cast<TargetMachine&>(MF.getTarget());
368 assert((Target.getRelocationModel() != Reloc::Default ||
369 Target.getRelocationModel() != Reloc::Static) &&
370 "JIT relocation model must be set to static or default!");
372 JTI = static_cast<ARMJITInfo*>(Target.getJITInfo());
373 II = static_cast<const ARMBaseInstrInfo*>(Target.getInstrInfo());
374 TD = Target.getDataLayout();
376 Subtarget = &TM.getSubtarget<ARMSubtarget>();
377 MCPEs = &MF.getConstantPool()->getConstants();
379 if (MF.getJumpTableInfo()) MJTEs = &MF.getJumpTableInfo()->getJumpTables();
380 IsPIC = TM.getRelocationModel() == Reloc::PIC_;
381 IsThumb = MF.getInfo<ARMFunctionInfo>()->isThumbFunction();
382 JTI->Initialize(MF, IsPIC);
383 MMI = &getAnalysis<MachineModuleInfo>();
384 MCE.setModuleInfo(MMI);
387 DEBUG(errs() << "JITTing function '"
388 << MF.getName() << "'\n");
389 MCE.startFunction(MF);
390 for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
392 MCE.StartMachineBasicBlock(MBB);
393 for (MachineBasicBlock::iterator I = MBB->begin(), E = MBB->end();
397 } while (MCE.finishFunction(MF));
402 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
404 unsigned ARMCodeEmitter::getShiftOp(unsigned Imm) const {
405 switch (ARM_AM::getAM2ShiftOpc(Imm)) {
406 default: llvm_unreachable("Unknown shift opc!");
407 case ARM_AM::asr: return 2;
408 case ARM_AM::lsl: return 0;
409 case ARM_AM::lsr: return 1;
411 case ARM_AM::rrx: return 3;
415 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
416 /// machine operand requires relocation, record the relocation and return zero.
417 unsigned ARMCodeEmitter::getMovi32Value(const MachineInstr &MI,
418 const MachineOperand &MO,
420 assert(((Reloc == ARM::reloc_arm_movt) || (Reloc == ARM::reloc_arm_movw))
421 && "Relocation to this function should be for movt or movw");
424 return static_cast<unsigned>(MO.getImm());
425 else if (MO.isGlobal())
426 emitGlobalAddress(MO.getGlobal(), Reloc, true, false);
427 else if (MO.isSymbol())
428 emitExternalSymbolAddress(MO.getSymbolName(), Reloc);
430 emitMachineBasicBlock(MO.getMBB(), Reloc);
435 llvm_unreachable("Unsupported operand type for movw/movt");
440 /// getMachineOpValue - Return binary encoding of operand. If the machine
441 /// operand requires relocation, record the relocation and return zero.
442 unsigned ARMCodeEmitter::getMachineOpValue(const MachineInstr &MI,
443 const MachineOperand &MO) const {
445 return II->getRegisterInfo().getEncodingValue(MO.getReg());
447 return static_cast<unsigned>(MO.getImm());
448 else if (MO.isGlobal())
449 emitGlobalAddress(MO.getGlobal(), ARM::reloc_arm_branch, true, false);
450 else if (MO.isSymbol())
451 emitExternalSymbolAddress(MO.getSymbolName(), ARM::reloc_arm_branch);
452 else if (MO.isCPI()) {
453 const MCInstrDesc &MCID = MI.getDesc();
454 // For VFP load, the immediate offset is multiplied by 4.
455 unsigned Reloc = ((MCID.TSFlags & ARMII::FormMask) == ARMII::VFPLdStFrm)
456 ? ARM::reloc_arm_vfp_cp_entry : ARM::reloc_arm_cp_entry;
457 emitConstPoolAddress(MO.getIndex(), Reloc);
458 } else if (MO.isJTI())
459 emitJumpTableAddress(MO.getIndex(), ARM::reloc_arm_relative);
461 emitMachineBasicBlock(MO.getMBB(), ARM::reloc_arm_branch);
463 llvm_unreachable("Unable to encode MachineOperand!");
467 /// emitGlobalAddress - Emit the specified address to the code stream.
469 void ARMCodeEmitter::emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
470 bool MayNeedFarStub, bool Indirect,
471 intptr_t ACPV) const {
472 MachineRelocation MR = Indirect
473 ? MachineRelocation::getIndirectSymbol(MCE.getCurrentPCOffset(), Reloc,
474 const_cast<GlobalValue *>(GV),
475 ACPV, MayNeedFarStub)
476 : MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc,
477 const_cast<GlobalValue *>(GV), ACPV,
479 MCE.addRelocation(MR);
482 /// emitExternalSymbolAddress - Arrange for the address of an external symbol to
483 /// be emitted to the current location in the function, and allow it to be PC
485 void ARMCodeEmitter::
486 emitExternalSymbolAddress(const char *ES, unsigned Reloc) const {
487 MCE.addRelocation(MachineRelocation::getExtSym(MCE.getCurrentPCOffset(),
491 /// emitConstPoolAddress - Arrange for the address of an constant pool
492 /// to be emitted to the current location in the function, and allow it to be PC
494 void ARMCodeEmitter::emitConstPoolAddress(unsigned CPI, unsigned Reloc) const {
495 // Tell JIT emitter we'll resolve the address.
496 MCE.addRelocation(MachineRelocation::getConstPool(MCE.getCurrentPCOffset(),
497 Reloc, CPI, 0, true));
500 /// emitJumpTableAddress - Arrange for the address of a jump table to
501 /// be emitted to the current location in the function, and allow it to be PC
503 void ARMCodeEmitter::
504 emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const {
505 MCE.addRelocation(MachineRelocation::getJumpTable(MCE.getCurrentPCOffset(),
506 Reloc, JTIndex, 0, true));
509 /// emitMachineBasicBlock - Emit the specified address basic block.
510 void ARMCodeEmitter::emitMachineBasicBlock(MachineBasicBlock *BB,
512 intptr_t JTBase) const {
513 MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(),
517 void ARMCodeEmitter::emitWordLE(unsigned Binary) {
518 DEBUG(errs() << " 0x";
519 errs().write_hex(Binary) << "\n");
520 MCE.emitWordLE(Binary);
523 void ARMCodeEmitter::emitDWordLE(uint64_t Binary) {
524 DEBUG(errs() << " 0x";
525 errs().write_hex(Binary) << "\n");
526 MCE.emitDWordLE(Binary);
529 void ARMCodeEmitter::emitInstruction(const MachineInstr &MI) {
530 DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << MI);
532 MCE.processDebugLoc(MI.getDebugLoc(), true);
534 ++NumEmitted; // Keep track of the # of mi's emitted
535 switch (MI.getDesc().TSFlags & ARMII::FormMask) {
537 llvm_unreachable("Unhandled instruction encoding format!");
540 if (MI.getOpcode() == ARM::LEApcrelJT) {
541 // Materialize jumptable address.
542 emitLEApcrelJTInstruction(MI);
545 llvm_unreachable("Unhandled instruction encoding!");
547 emitPseudoInstruction(MI);
550 case ARMII::DPSoRegFrm:
551 emitDataProcessingInstruction(MI);
555 emitLoadStoreInstruction(MI);
557 case ARMII::LdMiscFrm:
558 case ARMII::StMiscFrm:
559 emitMiscLoadStoreInstruction(MI);
561 case ARMII::LdStMulFrm:
562 emitLoadStoreMultipleInstruction(MI);
565 emitMulFrmInstruction(MI);
568 emitExtendInstruction(MI);
570 case ARMII::ArithMiscFrm:
571 emitMiscArithInstruction(MI);
574 emitSaturateInstruction(MI);
577 emitBranchInstruction(MI);
579 case ARMII::BrMiscFrm:
580 emitMiscBranchInstruction(MI);
583 case ARMII::VFPUnaryFrm:
584 case ARMII::VFPBinaryFrm:
585 emitVFPArithInstruction(MI);
587 case ARMII::VFPConv1Frm:
588 case ARMII::VFPConv2Frm:
589 case ARMII::VFPConv3Frm:
590 case ARMII::VFPConv4Frm:
591 case ARMII::VFPConv5Frm:
592 emitVFPConversionInstruction(MI);
594 case ARMII::VFPLdStFrm:
595 emitVFPLoadStoreInstruction(MI);
597 case ARMII::VFPLdStMulFrm:
598 emitVFPLoadStoreMultipleInstruction(MI);
601 // NEON instructions.
602 case ARMII::NGetLnFrm:
603 case ARMII::NSetLnFrm:
604 emitNEONLaneInstruction(MI);
607 emitNEONDupInstruction(MI);
609 case ARMII::N1RegModImmFrm:
610 emitNEON1RegModImmInstruction(MI);
612 case ARMII::N2RegFrm:
613 emitNEON2RegInstruction(MI);
615 case ARMII::N3RegFrm:
616 emitNEON3RegInstruction(MI);
619 MCE.processDebugLoc(MI.getDebugLoc(), false);
622 void ARMCodeEmitter::emitConstPoolInstruction(const MachineInstr &MI) {
623 unsigned CPI = MI.getOperand(0).getImm(); // CP instruction index.
624 unsigned CPIndex = MI.getOperand(1).getIndex(); // Actual cp entry index.
625 const MachineConstantPoolEntry &MCPE = (*MCPEs)[CPIndex];
627 // Remember the CONSTPOOL_ENTRY address for later relocation.
628 JTI->addConstantPoolEntryAddr(CPI, MCE.getCurrentPCValue());
630 // Emit constpool island entry. In most cases, the actual values will be
631 // resolved and relocated after code emission.
632 if (MCPE.isMachineConstantPoolEntry()) {
633 ARMConstantPoolValue *ACPV =
634 static_cast<ARMConstantPoolValue*>(MCPE.Val.MachineCPVal);
636 DEBUG(errs() << " ** ARM constant pool #" << CPI << " @ "
637 << (void*)MCE.getCurrentPCValue() << " " << *ACPV << '\n');
639 assert(ACPV->isGlobalValue() && "unsupported constant pool value");
640 const GlobalValue *GV = cast<ARMConstantPoolConstant>(ACPV)->getGV();
642 Reloc::Model RelocM = TM.getRelocationModel();
643 emitGlobalAddress(GV, ARM::reloc_arm_machine_cp_entry,
645 Subtarget->GVIsIndirectSymbol(GV, RelocM),
648 const char *Sym = cast<ARMConstantPoolSymbol>(ACPV)->getSymbol();
649 emitExternalSymbolAddress(Sym, ARM::reloc_arm_absolute);
653 const Constant *CV = MCPE.Val.ConstVal;
656 errs() << " ** Constant pool #" << CPI << " @ "
657 << (void*)MCE.getCurrentPCValue() << " ";
658 if (const Function *F = dyn_cast<Function>(CV))
659 errs() << F->getName();
665 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
666 emitGlobalAddress(GV, ARM::reloc_arm_absolute, isa<Function>(GV), false);
668 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
669 uint32_t Val = uint32_t(*CI->getValue().getRawData());
671 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
672 if (CFP->getType()->isFloatTy())
673 emitWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
674 else if (CFP->getType()->isDoubleTy())
675 emitDWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
677 llvm_unreachable("Unable to handle this constantpool entry!");
680 llvm_unreachable("Unable to handle this constantpool entry!");
685 void ARMCodeEmitter::emitMOVi32immInstruction(const MachineInstr &MI) {
686 const MachineOperand &MO0 = MI.getOperand(0);
687 const MachineOperand &MO1 = MI.getOperand(1);
689 // Emit the 'movw' instruction.
690 unsigned Binary = 0x30 << 20; // mov: Insts{27-20} = 0b00110000
692 unsigned Lo16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movw) & 0xFFFF;
694 // Set the conditional execution predicate.
695 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
698 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
700 // Encode imm16 as imm4:imm12
701 Binary |= Lo16 & 0xFFF; // Insts{11-0} = imm12
702 Binary |= ((Lo16 >> 12) & 0xF) << 16; // Insts{19-16} = imm4
705 unsigned Hi16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movt) >> 16;
706 // Emit the 'movt' instruction.
707 Binary = 0x34 << 20; // movt: Insts{27-20} = 0b00110100
709 // Set the conditional execution predicate.
710 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
713 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
715 // Encode imm16 as imm4:imm1, same as movw above.
716 Binary |= Hi16 & 0xFFF;
717 Binary |= ((Hi16 >> 12) & 0xF) << 16;
721 void ARMCodeEmitter::emitMOVi2piecesInstruction(const MachineInstr &MI) {
722 const MachineOperand &MO0 = MI.getOperand(0);
723 const MachineOperand &MO1 = MI.getOperand(1);
724 assert(MO1.isImm() && ARM_AM::isSOImmTwoPartVal(MO1.getImm()) &&
725 "Not a valid so_imm value!");
726 unsigned V1 = ARM_AM::getSOImmTwoPartFirst(MO1.getImm());
727 unsigned V2 = ARM_AM::getSOImmTwoPartSecond(MO1.getImm());
729 // Emit the 'mov' instruction.
730 unsigned Binary = 0xd << 21; // mov: Insts{24-21} = 0b1101
732 // Set the conditional execution predicate.
733 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
736 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
739 // Set bit I(25) to identify this is the immediate form of <shifter_op>
740 Binary |= 1 << ARMII::I_BitShift;
741 Binary |= getMachineSoImmOpValue(V1);
744 // Now the 'orr' instruction.
745 Binary = 0xc << 21; // orr: Insts{24-21} = 0b1100
747 // Set the conditional execution predicate.
748 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
751 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
754 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRnShift;
757 // Set bit I(25) to identify this is the immediate form of <shifter_op>
758 Binary |= 1 << ARMII::I_BitShift;
759 Binary |= getMachineSoImmOpValue(V2);
763 void ARMCodeEmitter::emitLEApcrelJTInstruction(const MachineInstr &MI) {
764 // It's basically add r, pc, (LJTI - $+8)
766 const MCInstrDesc &MCID = MI.getDesc();
768 // Emit the 'add' instruction.
769 unsigned Binary = 0x4 << 21; // add: Insts{24-21} = 0b0100
771 // Set the conditional execution predicate
772 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
774 // Encode S bit if MI modifies CPSR.
775 Binary |= getAddrModeSBit(MI, MCID);
778 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
780 // Encode Rn which is PC.
781 Binary |= II->getRegisterInfo().getEncodingValue(ARM::PC) << ARMII::RegRnShift;
783 // Encode the displacement.
784 Binary |= 1 << ARMII::I_BitShift;
785 emitJumpTableAddress(MI.getOperand(1).getIndex(), ARM::reloc_arm_jt_base);
790 void ARMCodeEmitter::emitPseudoMoveInstruction(const MachineInstr &MI) {
791 unsigned Opcode = MI.getDesc().Opcode;
793 // Part of binary is determined by TableGn.
794 unsigned Binary = getBinaryCodeForInstr(MI);
796 // Set the conditional execution predicate
797 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
799 // Encode S bit if MI modifies CPSR.
800 if (Opcode == ARM::MOVsrl_flag || Opcode == ARM::MOVsra_flag)
801 Binary |= 1 << ARMII::S_BitShift;
803 // Encode register def if there is one.
804 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
806 // Encode the shift operation.
813 case ARM::MOVsrl_flag:
815 Binary |= (0x2 << 4) | (1 << 7);
817 case ARM::MOVsra_flag:
819 Binary |= (0x4 << 4) | (1 << 7);
823 // Encode register Rm.
824 Binary |= getMachineOpValue(MI, 1);
829 void ARMCodeEmitter::addPCLabel(unsigned LabelID) {
830 DEBUG(errs() << " ** LPC" << LabelID << " @ "
831 << (void*)MCE.getCurrentPCValue() << '\n');
832 JTI->addPCLabelAddr(LabelID, MCE.getCurrentPCValue());
835 void ARMCodeEmitter::emitPseudoInstruction(const MachineInstr &MI) {
836 unsigned Opcode = MI.getDesc().Opcode;
839 llvm_unreachable("ARMCodeEmitter::emitPseudoInstruction");
841 case ARM::BMOVPCRX_CALL: {
842 // First emit mov lr, pc
843 unsigned Binary = 0x01a0e00f;
844 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
847 // and then emit the branch.
848 emitMiscBranchInstruction(MI);
851 case TargetOpcode::INLINEASM: {
852 // We allow inline assembler nodes with empty bodies - they can
853 // implicitly define registers, which is ok for JIT.
854 if (MI.getOperand(0).getSymbolName()[0]) {
855 report_fatal_error("JIT does not support inline asm!");
859 case TargetOpcode::CFI_INSTRUCTION:
861 case TargetOpcode::EH_LABEL:
862 MCE.emitLabel(MI.getOperand(0).getMCSymbol());
864 case TargetOpcode::IMPLICIT_DEF:
865 case TargetOpcode::KILL:
868 case ARM::CONSTPOOL_ENTRY:
869 emitConstPoolInstruction(MI);
872 // Remember of the address of the PC label for relocation later.
873 addPCLabel(MI.getOperand(2).getImm());
874 // PICADD is just an add instruction that implicitly read pc.
875 emitDataProcessingInstruction(MI, 0, ARM::PC);
882 // Remember of the address of the PC label for relocation later.
883 addPCLabel(MI.getOperand(2).getImm());
884 // These are just load / store instructions that implicitly read pc.
885 emitLoadStoreInstruction(MI, 0, ARM::PC);
892 // Remember of the address of the PC label for relocation later.
893 addPCLabel(MI.getOperand(2).getImm());
894 // These are just load / store instructions that implicitly read pc.
895 emitMiscLoadStoreInstruction(MI, ARM::PC);
900 // Two instructions to materialize a constant.
901 if (Subtarget->hasV6T2Ops())
902 emitMOVi32immInstruction(MI);
904 emitMOVi2piecesInstruction(MI);
907 case ARM::LEApcrelJT:
908 // Materialize jumptable address.
909 emitLEApcrelJTInstruction(MI);
912 case ARM::MOVsrl_flag:
913 case ARM::MOVsra_flag:
914 emitPseudoMoveInstruction(MI);
919 unsigned ARMCodeEmitter::getMachineSoRegOpValue(const MachineInstr &MI,
920 const MCInstrDesc &MCID,
921 const MachineOperand &MO,
923 unsigned Binary = getMachineOpValue(MI, MO);
925 const MachineOperand &MO1 = MI.getOperand(OpIdx + 1);
926 const MachineOperand &MO2 = MI.getOperand(OpIdx + 2);
927 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO2.getImm());
929 // Encode the shift opcode.
931 unsigned Rs = MO1.getReg();
933 // Set shift operand (bit[7:4]).
938 // RRX - 0110 and bit[11:8] clear.
940 default: llvm_unreachable("Unknown shift opc!");
941 case ARM_AM::lsl: SBits = 0x1; break;
942 case ARM_AM::lsr: SBits = 0x3; break;
943 case ARM_AM::asr: SBits = 0x5; break;
944 case ARM_AM::ror: SBits = 0x7; break;
945 case ARM_AM::rrx: SBits = 0x6; break;
948 // Set shift operand (bit[6:4]).
954 default: llvm_unreachable("Unknown shift opc!");
955 case ARM_AM::lsl: SBits = 0x0; break;
956 case ARM_AM::lsr: SBits = 0x2; break;
957 case ARM_AM::asr: SBits = 0x4; break;
958 case ARM_AM::ror: SBits = 0x6; break;
961 Binary |= SBits << 4;
962 if (SOpc == ARM_AM::rrx)
965 // Encode the shift operation Rs or shift_imm (except rrx).
967 // Encode Rs bit[11:8].
968 assert(ARM_AM::getSORegOffset(MO2.getImm()) == 0);
969 return Binary | (II->getRegisterInfo().getEncodingValue(Rs) << ARMII::RegRsShift);
972 // Encode shift_imm bit[11:7].
973 return Binary | ARM_AM::getSORegOffset(MO2.getImm()) << 7;
976 unsigned ARMCodeEmitter::getMachineSoImmOpValue(unsigned SoImm) {
977 int SoImmVal = ARM_AM::getSOImmVal(SoImm);
978 assert(SoImmVal != -1 && "Not a valid so_imm value!");
980 // Encode rotate_imm.
981 unsigned Binary = (ARM_AM::getSOImmValRot((unsigned)SoImmVal) >> 1)
982 << ARMII::SoRotImmShift;
985 Binary |= ARM_AM::getSOImmValImm((unsigned)SoImmVal);
989 unsigned ARMCodeEmitter::getAddrModeSBit(const MachineInstr &MI,
990 const MCInstrDesc &MCID) const {
991 for (unsigned i = MI.getNumOperands(), e = MCID.getNumOperands(); i >= e;--i){
992 const MachineOperand &MO = MI.getOperand(i-1);
993 if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR)
994 return 1 << ARMII::S_BitShift;
999 void ARMCodeEmitter::emitDataProcessingInstruction(const MachineInstr &MI,
1000 unsigned ImplicitRd,
1001 unsigned ImplicitRn) {
1002 const MCInstrDesc &MCID = MI.getDesc();
1004 // Part of binary is determined by TableGn.
1005 unsigned Binary = getBinaryCodeForInstr(MI);
1007 // Set the conditional execution predicate
1008 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1010 // Encode S bit if MI modifies CPSR.
1011 Binary |= getAddrModeSBit(MI, MCID);
1013 // Encode register def if there is one.
1014 unsigned NumDefs = MCID.getNumDefs();
1017 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1018 else if (ImplicitRd)
1019 // Special handling for implicit use (e.g. PC).
1020 Binary |= (II->getRegisterInfo().getEncodingValue(ImplicitRd) << ARMII::RegRdShift);
1022 if (MCID.Opcode == ARM::MOVi16) {
1023 // Get immediate from MI.
1024 unsigned Lo16 = getMovi32Value(MI, MI.getOperand(OpIdx),
1025 ARM::reloc_arm_movw);
1026 // Encode imm which is the same as in emitMOVi32immInstruction().
1027 Binary |= Lo16 & 0xFFF;
1028 Binary |= ((Lo16 >> 12) & 0xF) << 16;
1031 } else if(MCID.Opcode == ARM::MOVTi16) {
1032 unsigned Hi16 = (getMovi32Value(MI, MI.getOperand(OpIdx),
1033 ARM::reloc_arm_movt) >> 16);
1034 Binary |= Hi16 & 0xFFF;
1035 Binary |= ((Hi16 >> 12) & 0xF) << 16;
1038 } else if ((MCID.Opcode == ARM::BFC) || (MCID.Opcode == ARM::BFI)) {
1039 uint32_t v = ~MI.getOperand(2).getImm();
1040 int32_t lsb = countTrailingZeros(v);
1041 int32_t msb = (32 - countLeadingZeros(v)) - 1;
1042 // Instr{20-16} = msb, Instr{11-7} = lsb
1043 Binary |= (msb & 0x1F) << 16;
1044 Binary |= (lsb & 0x1F) << 7;
1047 } else if ((MCID.Opcode == ARM::UBFX) || (MCID.Opcode == ARM::SBFX)) {
1048 // Encode Rn in Instr{0-3}
1049 Binary |= getMachineOpValue(MI, OpIdx++);
1051 uint32_t lsb = MI.getOperand(OpIdx++).getImm();
1052 uint32_t widthm1 = MI.getOperand(OpIdx++).getImm() - 1;
1054 // Instr{20-16} = widthm1, Instr{11-7} = lsb
1055 Binary |= (widthm1 & 0x1F) << 16;
1056 Binary |= (lsb & 0x1F) << 7;
1061 // If this is a two-address operand, skip it. e.g. MOVCCr operand 1.
1062 if (MCID.getOperandConstraint(OpIdx, MCOI::TIED_TO) != -1)
1065 // Encode first non-shifter register operand if there is one.
1066 bool isUnary = MCID.TSFlags & ARMII::UnaryDP;
1069 // Special handling for implicit use (e.g. PC).
1070 Binary |= (II->getRegisterInfo().getEncodingValue(ImplicitRn) << ARMII::RegRnShift);
1072 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRnShift;
1077 // Encode shifter operand.
1078 const MachineOperand &MO = MI.getOperand(OpIdx);
1079 if ((MCID.TSFlags & ARMII::FormMask) == ARMII::DPSoRegFrm) {
1081 emitWordLE(Binary | getMachineSoRegOpValue(MI, MCID, MO, OpIdx));
1086 // Encode register Rm.
1087 emitWordLE(Binary | II->getRegisterInfo().getEncodingValue(MO.getReg()));
1092 Binary |= getMachineSoImmOpValue((unsigned)MO.getImm());
1097 void ARMCodeEmitter::emitLoadStoreInstruction(const MachineInstr &MI,
1098 unsigned ImplicitRd,
1099 unsigned ImplicitRn) {
1100 const MCInstrDesc &MCID = MI.getDesc();
1101 unsigned Form = MCID.TSFlags & ARMII::FormMask;
1102 bool IsPrePost = (MCID.TSFlags & ARMII::IndexModeMask) != 0;
1104 // Part of binary is determined by TableGn.
1105 unsigned Binary = getBinaryCodeForInstr(MI);
1107 // If this is an LDRi12, STRi12 or LDRcp, nothing more needs be done.
1108 if (MI.getOpcode() == ARM::LDRi12 || MI.getOpcode() == ARM::LDRcp ||
1109 MI.getOpcode() == ARM::STRi12) {
1114 // Set the conditional execution predicate
1115 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1119 // Operand 0 of a pre- and post-indexed store is the address base
1120 // writeback. Skip it.
1121 bool Skipped = false;
1122 if (IsPrePost && Form == ARMII::StFrm) {
1127 // Set first operand
1129 // Special handling for implicit use (e.g. PC).
1130 Binary |= (II->getRegisterInfo().getEncodingValue(ImplicitRd) << ARMII::RegRdShift);
1132 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1134 // Set second operand
1136 // Special handling for implicit use (e.g. PC).
1137 Binary |= (II->getRegisterInfo().getEncodingValue(ImplicitRn) << ARMII::RegRnShift);
1139 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1141 // If this is a two-address operand, skip it. e.g. LDR_PRE.
1142 if (!Skipped && MCID.getOperandConstraint(OpIdx, MCOI::TIED_TO) != -1)
1145 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1146 unsigned AM2Opc = (ImplicitRn == ARM::PC)
1147 ? 0 : MI.getOperand(OpIdx+1).getImm();
1149 // Set bit U(23) according to sign of immed value (positive or negative).
1150 Binary |= ((ARM_AM::getAM2Op(AM2Opc) == ARM_AM::add ? 1 : 0) <<
1152 if (!MO2.getReg()) { // is immediate
1153 if (ARM_AM::getAM2Offset(AM2Opc))
1154 // Set the value of offset_12 field
1155 Binary |= ARM_AM::getAM2Offset(AM2Opc);
1160 // Set bit I(25), because this is not in immediate encoding.
1161 Binary |= 1 << ARMII::I_BitShift;
1162 assert(TargetRegisterInfo::isPhysicalRegister(MO2.getReg()));
1163 // Set bit[3:0] to the corresponding Rm register
1164 Binary |= II->getRegisterInfo().getEncodingValue(MO2.getReg());
1166 // If this instr is in scaled register offset/index instruction, set
1167 // shift_immed(bit[11:7]) and shift(bit[6:5]) fields.
1168 if (unsigned ShImm = ARM_AM::getAM2Offset(AM2Opc)) {
1169 Binary |= getShiftOp(AM2Opc) << ARMII::ShiftImmShift; // shift
1170 Binary |= ShImm << ARMII::ShiftShift; // shift_immed
1176 void ARMCodeEmitter::emitMiscLoadStoreInstruction(const MachineInstr &MI,
1177 unsigned ImplicitRn) {
1178 const MCInstrDesc &MCID = MI.getDesc();
1179 unsigned Form = MCID.TSFlags & ARMII::FormMask;
1180 bool IsPrePost = (MCID.TSFlags & ARMII::IndexModeMask) != 0;
1182 // Part of binary is determined by TableGn.
1183 unsigned Binary = getBinaryCodeForInstr(MI);
1185 // Set the conditional execution predicate
1186 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1190 // Operand 0 of a pre- and post-indexed store is the address base
1191 // writeback. Skip it.
1192 bool Skipped = false;
1193 if (IsPrePost && Form == ARMII::StMiscFrm) {
1198 // Set first operand
1199 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1201 // Skip LDRD and STRD's second operand.
1202 if (MCID.Opcode == ARM::LDRD || MCID.Opcode == ARM::STRD)
1205 // Set second operand
1207 // Special handling for implicit use (e.g. PC).
1208 Binary |= (II->getRegisterInfo().getEncodingValue(ImplicitRn) << ARMII::RegRnShift);
1210 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1212 // If this is a two-address operand, skip it. e.g. LDRH_POST.
1213 if (!Skipped && MCID.getOperandConstraint(OpIdx, MCOI::TIED_TO) != -1)
1216 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1217 unsigned AM3Opc = (ImplicitRn == ARM::PC)
1218 ? 0 : MI.getOperand(OpIdx+1).getImm();
1220 // Set bit U(23) according to sign of immed value (positive or negative)
1221 Binary |= ((ARM_AM::getAM3Op(AM3Opc) == ARM_AM::add ? 1 : 0) <<
1224 // If this instr is in register offset/index encoding, set bit[3:0]
1225 // to the corresponding Rm register.
1227 Binary |= II->getRegisterInfo().getEncodingValue(MO2.getReg());
1232 // This instr is in immediate offset/index encoding, set bit 22 to 1.
1233 Binary |= 1 << ARMII::AM3_I_BitShift;
1234 if (unsigned ImmOffs = ARM_AM::getAM3Offset(AM3Opc)) {
1236 Binary |= (ImmOffs >> 4) << ARMII::ImmHiShift; // immedH
1237 Binary |= (ImmOffs & 0xF); // immedL
1243 static unsigned getAddrModeUPBits(unsigned Mode) {
1244 unsigned Binary = 0;
1246 // Set addressing mode by modifying bits U(23) and P(24)
1247 // IA - Increment after - bit U = 1 and bit P = 0
1248 // IB - Increment before - bit U = 1 and bit P = 1
1249 // DA - Decrement after - bit U = 0 and bit P = 0
1250 // DB - Decrement before - bit U = 0 and bit P = 1
1252 default: llvm_unreachable("Unknown addressing sub-mode!");
1253 case ARM_AM::da: break;
1254 case ARM_AM::db: Binary |= 0x1 << ARMII::P_BitShift; break;
1255 case ARM_AM::ia: Binary |= 0x1 << ARMII::U_BitShift; break;
1256 case ARM_AM::ib: Binary |= 0x3 << ARMII::U_BitShift; break;
1262 void ARMCodeEmitter::emitLoadStoreMultipleInstruction(const MachineInstr &MI) {
1263 const MCInstrDesc &MCID = MI.getDesc();
1264 bool IsUpdating = (MCID.TSFlags & ARMII::IndexModeMask) != 0;
1266 // Part of binary is determined by TableGn.
1267 unsigned Binary = getBinaryCodeForInstr(MI);
1269 // Set the conditional execution predicate
1270 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1272 // Skip operand 0 of an instruction with base register update.
1277 // Set base address operand
1278 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1280 // Set addressing mode by modifying bits U(23) and P(24)
1281 ARM_AM::AMSubMode Mode = ARM_AM::getLoadStoreMultipleSubMode(MI.getOpcode());
1282 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(Mode));
1286 Binary |= 0x1 << ARMII::W_BitShift;
1289 for (unsigned i = OpIdx+2, e = MI.getNumOperands(); i != e; ++i) {
1290 const MachineOperand &MO = MI.getOperand(i);
1291 if (!MO.isReg() || MO.isImplicit())
1293 unsigned RegNum = II->getRegisterInfo().getEncodingValue(MO.getReg());
1294 assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
1296 Binary |= 0x1 << RegNum;
1302 void ARMCodeEmitter::emitMulFrmInstruction(const MachineInstr &MI) {
1303 const MCInstrDesc &MCID = MI.getDesc();
1305 // Part of binary is determined by TableGn.
1306 unsigned Binary = getBinaryCodeForInstr(MI);
1308 // Set the conditional execution predicate
1309 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1311 // Encode S bit if MI modifies CPSR.
1312 Binary |= getAddrModeSBit(MI, MCID);
1314 // 32x32->64bit operations have two destination registers. The number
1315 // of register definitions will tell us if that's what we're dealing with.
1317 if (MCID.getNumDefs() == 2)
1318 Binary |= getMachineOpValue (MI, OpIdx++) << ARMII::RegRdLoShift;
1321 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdHiShift;
1324 Binary |= getMachineOpValue(MI, OpIdx++);
1327 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRsShift;
1329 // Many multiple instructions (e.g. MLA) have three src operands. Encode
1330 // it as Rn (for multiply, that's in the same offset as RdLo.
1331 if (MCID.getNumOperands() > OpIdx &&
1332 !MCID.OpInfo[OpIdx].isPredicate() &&
1333 !MCID.OpInfo[OpIdx].isOptionalDef())
1334 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRdLoShift;
1339 void ARMCodeEmitter::emitExtendInstruction(const MachineInstr &MI) {
1340 const MCInstrDesc &MCID = MI.getDesc();
1342 // Part of binary is determined by TableGn.
1343 unsigned Binary = getBinaryCodeForInstr(MI);
1345 // Set the conditional execution predicate
1346 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1351 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1353 const MachineOperand &MO1 = MI.getOperand(OpIdx++);
1354 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1356 // Two register operand form.
1358 Binary |= getMachineOpValue(MI, MO1) << ARMII::RegRnShift;
1361 Binary |= getMachineOpValue(MI, MO2);
1364 Binary |= getMachineOpValue(MI, MO1);
1367 // Encode rot imm (0, 8, 16, or 24) if it has a rotate immediate operand.
1368 if (MI.getOperand(OpIdx).isImm() &&
1369 !MCID.OpInfo[OpIdx].isPredicate() &&
1370 !MCID.OpInfo[OpIdx].isOptionalDef())
1371 Binary |= (getMachineOpValue(MI, OpIdx) / 8) << ARMII::ExtRotImmShift;
1376 void ARMCodeEmitter::emitMiscArithInstruction(const MachineInstr &MI) {
1377 const MCInstrDesc &MCID = MI.getDesc();
1379 // Part of binary is determined by TableGn.
1380 unsigned Binary = getBinaryCodeForInstr(MI);
1382 // Set the conditional execution predicate
1383 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1385 // PKH instructions are finished at this point
1386 if (MCID.Opcode == ARM::PKHBT || MCID.Opcode == ARM::PKHTB) {
1394 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1396 const MachineOperand &MO = MI.getOperand(OpIdx++);
1397 if (OpIdx == MCID.getNumOperands() ||
1398 MCID.OpInfo[OpIdx].isPredicate() ||
1399 MCID.OpInfo[OpIdx].isOptionalDef()) {
1400 // Encode Rm and it's done.
1401 Binary |= getMachineOpValue(MI, MO);
1407 Binary |= getMachineOpValue(MI, MO) << ARMII::RegRnShift;
1410 Binary |= getMachineOpValue(MI, OpIdx++);
1412 // Encode shift_imm.
1413 unsigned ShiftAmt = MI.getOperand(OpIdx).getImm();
1414 if (MCID.Opcode == ARM::PKHTB) {
1415 assert(ShiftAmt != 0 && "PKHTB shift_imm is 0!");
1419 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1420 Binary |= ShiftAmt << ARMII::ShiftShift;
1425 void ARMCodeEmitter::emitSaturateInstruction(const MachineInstr &MI) {
1426 const MCInstrDesc &MCID = MI.getDesc();
1428 // Part of binary is determined by TableGen.
1429 unsigned Binary = getBinaryCodeForInstr(MI);
1431 // Set the conditional execution predicate
1432 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1435 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
1437 // Encode saturate bit position.
1438 unsigned Pos = MI.getOperand(1).getImm();
1439 if (MCID.Opcode == ARM::SSAT || MCID.Opcode == ARM::SSAT16)
1441 assert((Pos < 16 || (Pos < 32 &&
1442 MCID.Opcode != ARM::SSAT16 &&
1443 MCID.Opcode != ARM::USAT16)) &&
1444 "saturate bit position out of range");
1445 Binary |= Pos << 16;
1448 Binary |= getMachineOpValue(MI, 2);
1450 // Encode shift_imm.
1451 if (MCID.getNumOperands() == 4) {
1452 unsigned ShiftOp = MI.getOperand(3).getImm();
1453 ARM_AM::ShiftOpc Opc = ARM_AM::getSORegShOp(ShiftOp);
1454 if (Opc == ARM_AM::asr)
1456 unsigned ShiftAmt = MI.getOperand(3).getImm();
1457 if (ShiftAmt == 32 && Opc == ARM_AM::asr)
1459 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1460 Binary |= ShiftAmt << ARMII::ShiftShift;
1466 void ARMCodeEmitter::emitBranchInstruction(const MachineInstr &MI) {
1467 const MCInstrDesc &MCID = MI.getDesc();
1469 if (MCID.Opcode == ARM::TPsoft) {
1470 llvm_unreachable("ARM::TPsoft FIXME"); // FIXME
1473 // Part of binary is determined by TableGn.
1474 unsigned Binary = getBinaryCodeForInstr(MI);
1476 // Set the conditional execution predicate
1477 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1479 // Set signed_immed_24 field
1480 Binary |= getMachineOpValue(MI, 0);
1485 void ARMCodeEmitter::emitInlineJumpTable(unsigned JTIndex) {
1486 // Remember the base address of the inline jump table.
1487 uintptr_t JTBase = MCE.getCurrentPCValue();
1488 JTI->addJumpTableBaseAddr(JTIndex, JTBase);
1489 DEBUG(errs() << " ** Jump Table #" << JTIndex << " @ " << (void*)JTBase
1492 // Now emit the jump table entries.
1493 const std::vector<MachineBasicBlock*> &MBBs = (*MJTEs)[JTIndex].MBBs;
1494 for (unsigned i = 0, e = MBBs.size(); i != e; ++i) {
1496 // DestBB address - JT base.
1497 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_pic_jt, JTBase);
1499 // Absolute DestBB address.
1500 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_absolute);
1505 void ARMCodeEmitter::emitMiscBranchInstruction(const MachineInstr &MI) {
1506 const MCInstrDesc &MCID = MI.getDesc();
1508 // Handle jump tables.
1509 if (MCID.Opcode == ARM::BR_JTr || MCID.Opcode == ARM::BR_JTadd) {
1510 // First emit a ldr pc, [] instruction.
1511 emitDataProcessingInstruction(MI, ARM::PC);
1513 // Then emit the inline jump table.
1515 (MCID.Opcode == ARM::BR_JTr)
1516 ? MI.getOperand(1).getIndex() : MI.getOperand(2).getIndex();
1517 emitInlineJumpTable(JTIndex);
1519 } else if (MCID.Opcode == ARM::BR_JTm) {
1520 // First emit a ldr pc, [] instruction.
1521 emitLoadStoreInstruction(MI, ARM::PC);
1523 // Then emit the inline jump table.
1524 emitInlineJumpTable(MI.getOperand(3).getIndex());
1528 // Part of binary is determined by TableGn.
1529 unsigned Binary = getBinaryCodeForInstr(MI);
1531 // Set the conditional execution predicate
1532 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1534 if (MCID.Opcode == ARM::BX_RET || MCID.Opcode == ARM::MOVPCLR)
1535 // The return register is LR.
1536 Binary |= II->getRegisterInfo().getEncodingValue(ARM::LR);
1538 // otherwise, set the return register
1539 Binary |= getMachineOpValue(MI, 0);
1544 unsigned ARMCodeEmitter::encodeVFPRd(const MachineInstr &MI,
1545 unsigned OpIdx) const {
1546 unsigned RegD = MI.getOperand(OpIdx).getReg();
1547 unsigned Binary = 0;
1548 bool isSPVFP = ARM::SPRRegClass.contains(RegD);
1549 RegD = II->getRegisterInfo().getEncodingValue(RegD);
1551 Binary |= RegD << ARMII::RegRdShift;
1553 Binary |= ((RegD & 0x1E) >> 1) << ARMII::RegRdShift;
1554 Binary |= (RegD & 0x01) << ARMII::D_BitShift;
1559 unsigned ARMCodeEmitter::encodeVFPRn(const MachineInstr &MI,
1560 unsigned OpIdx) const {
1561 unsigned RegN = MI.getOperand(OpIdx).getReg();
1562 unsigned Binary = 0;
1563 bool isSPVFP = ARM::SPRRegClass.contains(RegN);
1564 RegN = II->getRegisterInfo().getEncodingValue(RegN);
1566 Binary |= RegN << ARMII::RegRnShift;
1568 Binary |= ((RegN & 0x1E) >> 1) << ARMII::RegRnShift;
1569 Binary |= (RegN & 0x01) << ARMII::N_BitShift;
1574 unsigned ARMCodeEmitter::encodeVFPRm(const MachineInstr &MI,
1575 unsigned OpIdx) const {
1576 unsigned RegM = MI.getOperand(OpIdx).getReg();
1577 unsigned Binary = 0;
1578 bool isSPVFP = ARM::SPRRegClass.contains(RegM);
1579 RegM = II->getRegisterInfo().getEncodingValue(RegM);
1583 Binary |= ((RegM & 0x1E) >> 1);
1584 Binary |= (RegM & 0x01) << ARMII::M_BitShift;
1589 void ARMCodeEmitter::emitVFPArithInstruction(const MachineInstr &MI) {
1590 const MCInstrDesc &MCID = MI.getDesc();
1592 // Part of binary is determined by TableGn.
1593 unsigned Binary = getBinaryCodeForInstr(MI);
1595 // Set the conditional execution predicate
1596 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1599 assert((Binary & ARMII::D_BitShift) == 0 &&
1600 (Binary & ARMII::N_BitShift) == 0 &&
1601 (Binary & ARMII::M_BitShift) == 0 && "VFP encoding bug!");
1604 Binary |= encodeVFPRd(MI, OpIdx++);
1606 // If this is a two-address operand, skip it, e.g. FMACD.
1607 if (MCID.getOperandConstraint(OpIdx, MCOI::TIED_TO) != -1)
1611 if ((MCID.TSFlags & ARMII::FormMask) == ARMII::VFPBinaryFrm)
1612 Binary |= encodeVFPRn(MI, OpIdx++);
1614 if (OpIdx == MCID.getNumOperands() ||
1615 MCID.OpInfo[OpIdx].isPredicate() ||
1616 MCID.OpInfo[OpIdx].isOptionalDef()) {
1617 // FCMPEZD etc. has only one operand.
1623 Binary |= encodeVFPRm(MI, OpIdx);
1628 void ARMCodeEmitter::emitVFPConversionInstruction(const MachineInstr &MI) {
1629 const MCInstrDesc &MCID = MI.getDesc();
1630 unsigned Form = MCID.TSFlags & ARMII::FormMask;
1632 // Part of binary is determined by TableGn.
1633 unsigned Binary = getBinaryCodeForInstr(MI);
1635 // Set the conditional execution predicate
1636 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1640 case ARMII::VFPConv1Frm:
1641 case ARMII::VFPConv2Frm:
1642 case ARMII::VFPConv3Frm:
1644 Binary |= encodeVFPRd(MI, 0);
1646 case ARMII::VFPConv4Frm:
1648 Binary |= encodeVFPRn(MI, 0);
1650 case ARMII::VFPConv5Frm:
1652 Binary |= encodeVFPRm(MI, 0);
1658 case ARMII::VFPConv1Frm:
1660 Binary |= encodeVFPRm(MI, 1);
1662 case ARMII::VFPConv2Frm:
1663 case ARMII::VFPConv3Frm:
1665 Binary |= encodeVFPRn(MI, 1);
1667 case ARMII::VFPConv4Frm:
1668 case ARMII::VFPConv5Frm:
1670 Binary |= encodeVFPRd(MI, 1);
1674 if (Form == ARMII::VFPConv5Frm)
1676 Binary |= encodeVFPRn(MI, 2);
1677 else if (Form == ARMII::VFPConv3Frm)
1679 Binary |= encodeVFPRm(MI, 2);
1684 void ARMCodeEmitter::emitVFPLoadStoreInstruction(const MachineInstr &MI) {
1685 // Part of binary is determined by TableGn.
1686 unsigned Binary = getBinaryCodeForInstr(MI);
1688 // Set the conditional execution predicate
1689 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1694 Binary |= encodeVFPRd(MI, OpIdx++);
1696 // Encode address base.
1697 const MachineOperand &Base = MI.getOperand(OpIdx++);
1698 Binary |= getMachineOpValue(MI, Base) << ARMII::RegRnShift;
1700 // If there is a non-zero immediate offset, encode it.
1702 const MachineOperand &Offset = MI.getOperand(OpIdx);
1703 if (unsigned ImmOffs = ARM_AM::getAM5Offset(Offset.getImm())) {
1704 if (ARM_AM::getAM5Op(Offset.getImm()) == ARM_AM::add)
1705 Binary |= 1 << ARMII::U_BitShift;
1712 // If immediate offset is omitted, default to +0.
1713 Binary |= 1 << ARMII::U_BitShift;
1719 ARMCodeEmitter::emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI) {
1720 const MCInstrDesc &MCID = MI.getDesc();
1721 bool IsUpdating = (MCID.TSFlags & ARMII::IndexModeMask) != 0;
1723 // Part of binary is determined by TableGn.
1724 unsigned Binary = getBinaryCodeForInstr(MI);
1726 // Set the conditional execution predicate
1727 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1729 // Skip operand 0 of an instruction with base register update.
1734 // Set base address operand
1735 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1737 // Set addressing mode by modifying bits U(23) and P(24)
1738 ARM_AM::AMSubMode Mode = ARM_AM::getLoadStoreMultipleSubMode(MI.getOpcode());
1739 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(Mode));
1743 Binary |= 0x1 << ARMII::W_BitShift;
1745 // First register is encoded in Dd.
1746 Binary |= encodeVFPRd(MI, OpIdx+2);
1748 // Count the number of registers.
1749 unsigned NumRegs = 1;
1750 for (unsigned i = OpIdx+3, e = MI.getNumOperands(); i != e; ++i) {
1751 const MachineOperand &MO = MI.getOperand(i);
1752 if (!MO.isReg() || MO.isImplicit())
1756 // Bit 8 will be set if <list> is consecutive 64-bit registers (e.g., D0)
1757 // Otherwise, it will be 0, in the case of 32-bit registers.
1759 Binary |= NumRegs * 2;
1766 unsigned ARMCodeEmitter::encodeNEONRd(const MachineInstr &MI,
1767 unsigned OpIdx) const {
1768 unsigned RegD = MI.getOperand(OpIdx).getReg();
1769 unsigned Binary = 0;
1770 RegD = II->getRegisterInfo().getEncodingValue(RegD);
1771 Binary |= (RegD & 0xf) << ARMII::RegRdShift;
1772 Binary |= ((RegD >> 4) & 1) << ARMII::D_BitShift;
1776 unsigned ARMCodeEmitter::encodeNEONRn(const MachineInstr &MI,
1777 unsigned OpIdx) const {
1778 unsigned RegN = MI.getOperand(OpIdx).getReg();
1779 unsigned Binary = 0;
1780 RegN = II->getRegisterInfo().getEncodingValue(RegN);
1781 Binary |= (RegN & 0xf) << ARMII::RegRnShift;
1782 Binary |= ((RegN >> 4) & 1) << ARMII::N_BitShift;
1786 unsigned ARMCodeEmitter::encodeNEONRm(const MachineInstr &MI,
1787 unsigned OpIdx) const {
1788 unsigned RegM = MI.getOperand(OpIdx).getReg();
1789 unsigned Binary = 0;
1790 RegM = II->getRegisterInfo().getEncodingValue(RegM);
1791 Binary |= (RegM & 0xf);
1792 Binary |= ((RegM >> 4) & 1) << ARMII::M_BitShift;
1796 /// convertNEONDataProcToThumb - Convert the ARM mode encoding for a NEON
1797 /// data-processing instruction to the corresponding Thumb encoding.
1798 static unsigned convertNEONDataProcToThumb(unsigned Binary) {
1799 assert((Binary & 0xfe000000) == 0xf2000000 &&
1800 "not an ARM NEON data-processing instruction");
1801 unsigned UBit = (Binary >> 24) & 1;
1802 return 0xef000000 | (UBit << 28) | (Binary & 0xffffff);
1805 void ARMCodeEmitter::emitNEONLaneInstruction(const MachineInstr &MI) {
1806 unsigned Binary = getBinaryCodeForInstr(MI);
1808 unsigned RegTOpIdx, RegNOpIdx, LnOpIdx;
1809 const MCInstrDesc &MCID = MI.getDesc();
1810 if ((MCID.TSFlags & ARMII::FormMask) == ARMII::NGetLnFrm) {
1814 } else { // ARMII::NSetLnFrm
1820 // Set the conditional execution predicate
1821 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1823 unsigned RegT = MI.getOperand(RegTOpIdx).getReg();
1824 RegT = II->getRegisterInfo().getEncodingValue(RegT);
1825 Binary |= (RegT << ARMII::RegRdShift);
1826 Binary |= encodeNEONRn(MI, RegNOpIdx);
1829 if ((Binary & (1 << 22)) != 0)
1830 LaneShift = 0; // 8-bit elements
1831 else if ((Binary & (1 << 5)) != 0)
1832 LaneShift = 1; // 16-bit elements
1834 LaneShift = 2; // 32-bit elements
1836 unsigned Lane = MI.getOperand(LnOpIdx).getImm() << LaneShift;
1837 unsigned Opc1 = Lane >> 2;
1838 unsigned Opc2 = Lane & 3;
1839 assert((Opc1 & 3) == 0 && "out-of-range lane number operand");
1840 Binary |= (Opc1 << 21);
1841 Binary |= (Opc2 << 5);
1846 void ARMCodeEmitter::emitNEONDupInstruction(const MachineInstr &MI) {
1847 unsigned Binary = getBinaryCodeForInstr(MI);
1849 // Set the conditional execution predicate
1850 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1852 unsigned RegT = MI.getOperand(1).getReg();
1853 RegT = II->getRegisterInfo().getEncodingValue(RegT);
1854 Binary |= (RegT << ARMII::RegRdShift);
1855 Binary |= encodeNEONRn(MI, 0);
1859 void ARMCodeEmitter::emitNEON1RegModImmInstruction(const MachineInstr &MI) {
1860 unsigned Binary = getBinaryCodeForInstr(MI);
1861 // Destination register is encoded in Dd.
1862 Binary |= encodeNEONRd(MI, 0);
1863 // Immediate fields: Op, Cmode, I, Imm3, Imm4
1864 unsigned Imm = MI.getOperand(1).getImm();
1865 unsigned Op = (Imm >> 12) & 1;
1866 unsigned Cmode = (Imm >> 8) & 0xf;
1867 unsigned I = (Imm >> 7) & 1;
1868 unsigned Imm3 = (Imm >> 4) & 0x7;
1869 unsigned Imm4 = Imm & 0xf;
1870 Binary |= (I << 24) | (Imm3 << 16) | (Cmode << 8) | (Op << 5) | Imm4;
1872 Binary = convertNEONDataProcToThumb(Binary);
1876 void ARMCodeEmitter::emitNEON2RegInstruction(const MachineInstr &MI) {
1877 const MCInstrDesc &MCID = MI.getDesc();
1878 unsigned Binary = getBinaryCodeForInstr(MI);
1879 // Destination register is encoded in Dd; source register in Dm.
1881 Binary |= encodeNEONRd(MI, OpIdx++);
1882 if (MCID.getOperandConstraint(OpIdx, MCOI::TIED_TO) != -1)
1884 Binary |= encodeNEONRm(MI, OpIdx);
1886 Binary = convertNEONDataProcToThumb(Binary);
1887 // FIXME: This does not handle VDUPfdf or VDUPfqf.
1891 void ARMCodeEmitter::emitNEON3RegInstruction(const MachineInstr &MI) {
1892 const MCInstrDesc &MCID = MI.getDesc();
1893 unsigned Binary = getBinaryCodeForInstr(MI);
1894 // Destination register is encoded in Dd; source registers in Dn and Dm.
1896 Binary |= encodeNEONRd(MI, OpIdx++);
1897 if (MCID.getOperandConstraint(OpIdx, MCOI::TIED_TO) != -1)
1899 Binary |= encodeNEONRn(MI, OpIdx++);
1900 if (MCID.getOperandConstraint(OpIdx, MCOI::TIED_TO) != -1)
1902 Binary |= encodeNEONRm(MI, OpIdx);
1904 Binary = convertNEONDataProcToThumb(Binary);
1905 // FIXME: This does not handle VMOVDneon or VMOVQ.
1909 #include "ARMGenCodeEmitter.inc"