1 //===-- ARM/ARMCodeEmitter.cpp - Convert ARM code to machine code ---------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the pass that transforms the ARM machine instructions into
11 // relocatable machine code.
13 //===----------------------------------------------------------------------===//
15 #define DEBUG_TYPE "jit"
17 #include "ARMAddressingModes.h"
18 #include "ARMConstantPoolValue.h"
19 #include "ARMInstrInfo.h"
20 #include "ARMRelocations.h"
21 #include "ARMSubtarget.h"
22 #include "ARMTargetMachine.h"
23 #include "llvm/Constants.h"
24 #include "llvm/DerivedTypes.h"
25 #include "llvm/Function.h"
26 #include "llvm/PassManager.h"
27 #include "llvm/CodeGen/JITCodeEmitter.h"
28 #include "llvm/CodeGen/MachineConstantPool.h"
29 #include "llvm/CodeGen/MachineFunctionPass.h"
30 #include "llvm/CodeGen/MachineInstr.h"
31 #include "llvm/CodeGen/MachineJumpTableInfo.h"
32 #include "llvm/CodeGen/MachineModuleInfo.h"
33 #include "llvm/CodeGen/Passes.h"
34 #include "llvm/ADT/Statistic.h"
35 #include "llvm/Support/Debug.h"
36 #include "llvm/Support/ErrorHandling.h"
37 #include "llvm/Support/raw_ostream.h"
43 STATISTIC(NumEmitted, "Number of machine instructions emitted");
47 class ARMCodeEmitter : public MachineFunctionPass {
49 const ARMInstrInfo *II;
51 const ARMSubtarget *Subtarget;
54 MachineModuleInfo *MMI;
55 const std::vector<MachineConstantPoolEntry> *MCPEs;
56 const std::vector<MachineJumpTableEntry> *MJTEs;
60 void getAnalysisUsage(AnalysisUsage &AU) const {
61 AU.addRequired<MachineModuleInfo>();
62 MachineFunctionPass::getAnalysisUsage(AU);
67 ARMCodeEmitter(TargetMachine &tm, JITCodeEmitter &mce)
68 : MachineFunctionPass(ID), JTI(0),
69 II((const ARMInstrInfo *)tm.getInstrInfo()),
70 TD(tm.getTargetData()), TM(tm),
71 MCE(mce), MCPEs(0), MJTEs(0),
72 IsPIC(TM.getRelocationModel() == Reloc::PIC_), IsThumb(false) {}
74 /// getBinaryCodeForInstr - This function, generated by the
75 /// CodeEmitterGenerator using TableGen, produces the binary encoding for
76 /// machine instructions.
77 unsigned getBinaryCodeForInstr(const MachineInstr &MI) const;
79 bool runOnMachineFunction(MachineFunction &MF);
81 virtual const char *getPassName() const {
82 return "ARM Machine Code Emitter";
85 void emitInstruction(const MachineInstr &MI);
89 void emitWordLE(unsigned Binary);
90 void emitDWordLE(uint64_t Binary);
91 void emitConstPoolInstruction(const MachineInstr &MI);
92 void emitMOVi32immInstruction(const MachineInstr &MI);
93 void emitMOVi2piecesInstruction(const MachineInstr &MI);
94 void emitLEApcrelJTInstruction(const MachineInstr &MI);
95 void emitPseudoMoveInstruction(const MachineInstr &MI);
96 void addPCLabel(unsigned LabelID);
97 void emitPseudoInstruction(const MachineInstr &MI);
98 unsigned getMachineSoRegOpValue(const MachineInstr &MI,
99 const TargetInstrDesc &TID,
100 const MachineOperand &MO,
103 unsigned getMachineSoImmOpValue(unsigned SoImm);
104 unsigned getAddrModeSBit(const MachineInstr &MI,
105 const TargetInstrDesc &TID) const;
107 void emitDataProcessingInstruction(const MachineInstr &MI,
108 unsigned ImplicitRd = 0,
109 unsigned ImplicitRn = 0);
111 void emitLoadStoreInstruction(const MachineInstr &MI,
112 unsigned ImplicitRd = 0,
113 unsigned ImplicitRn = 0);
115 void emitMiscLoadStoreInstruction(const MachineInstr &MI,
116 unsigned ImplicitRn = 0);
118 void emitLoadStoreMultipleInstruction(const MachineInstr &MI);
120 void emitMulFrmInstruction(const MachineInstr &MI);
122 void emitExtendInstruction(const MachineInstr &MI);
124 void emitMiscArithInstruction(const MachineInstr &MI);
126 void emitSaturateInstruction(const MachineInstr &MI);
128 void emitBranchInstruction(const MachineInstr &MI);
130 void emitInlineJumpTable(unsigned JTIndex);
132 void emitMiscBranchInstruction(const MachineInstr &MI);
134 void emitVFPArithInstruction(const MachineInstr &MI);
136 void emitVFPConversionInstruction(const MachineInstr &MI);
138 void emitVFPLoadStoreInstruction(const MachineInstr &MI);
140 void emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI);
142 void emitNEONLaneInstruction(const MachineInstr &MI);
143 void emitNEONDupInstruction(const MachineInstr &MI);
144 void emitNEON1RegModImmInstruction(const MachineInstr &MI);
145 void emitNEON2RegInstruction(const MachineInstr &MI);
146 void emitNEON3RegInstruction(const MachineInstr &MI);
148 /// getMachineOpValue - Return binary encoding of operand. If the machine
149 /// operand requires relocation, record the relocation and return zero.
150 unsigned getMachineOpValue(const MachineInstr &MI,
151 const MachineOperand &MO) const;
152 unsigned getMachineOpValue(const MachineInstr &MI, unsigned OpIdx) const {
153 return getMachineOpValue(MI, MI.getOperand(OpIdx));
156 // FIXME: The legacy JIT ARMCodeEmitter doesn't rely on the the
157 // TableGen'erated getBinaryCodeForInstr() function to encode any
158 // operand values, instead querying getMachineOpValue() directly for
159 // each operand it needs to encode. Thus, any of the new encoder
160 // helper functions can simply return 0 as the values the return
161 // are already handled elsewhere. They are placeholders to allow this
162 // encoder to continue to function until the MC encoder is sufficiently
163 // far along that this one can be eliminated entirely.
164 unsigned NEONThumb2DataIPostEncoder(const MachineInstr &MI, unsigned Val)
166 unsigned NEONThumb2LoadStorePostEncoder(const MachineInstr &MI,unsigned Val)
168 unsigned NEONThumb2DupPostEncoder(const MachineInstr &MI,unsigned Val)
170 unsigned VFPThumb2PostEncoder(const MachineInstr&MI, unsigned Val)
172 unsigned getAdrLabelOpValue(const MachineInstr &MI, unsigned Op)
174 unsigned getThumbAdrLabelOpValue(const MachineInstr &MI, unsigned Op)
176 unsigned getThumbBLTargetOpValue(const MachineInstr &MI, unsigned Op)
178 unsigned getThumbBLXTargetOpValue(const MachineInstr &MI, unsigned Op)
180 unsigned getThumbBRTargetOpValue(const MachineInstr &MI, unsigned Op)
182 unsigned getThumbBCCTargetOpValue(const MachineInstr &MI, unsigned Op)
184 unsigned getThumbCBTargetOpValue(const MachineInstr &MI, unsigned Op)
186 unsigned getBranchTargetOpValue(const MachineInstr &MI, unsigned Op)
188 unsigned getUnconditionalBranchTargetOpValue(const MachineInstr &MI,
189 unsigned Op) const { return 0; }
190 unsigned getCCOutOpValue(const MachineInstr &MI, unsigned Op)
192 unsigned getSOImmOpValue(const MachineInstr &MI, unsigned Op)
194 unsigned getT2SOImmOpValue(const MachineInstr &MI, unsigned Op)
196 unsigned getSORegOpValue(const MachineInstr &MI, unsigned Op)
198 unsigned getThumbAddrModeRegRegOpValue(const MachineInstr &MI, unsigned Op)
200 unsigned getT2AddrModeImm12OpValue(const MachineInstr &MI, unsigned Op)
202 unsigned getT2AddrModeImm8OpValue(const MachineInstr &MI, unsigned Op)
204 unsigned getT2AddrModeImm8s4OpValue(const MachineInstr &MI, unsigned Op)
206 unsigned getT2AddrModeImm8OffsetOpValue(const MachineInstr &MI, unsigned Op)
208 unsigned getT2AddrModeImm12OffsetOpValue(const MachineInstr &MI,unsigned Op)
210 unsigned getT2AddrModeSORegOpValue(const MachineInstr &MI, unsigned Op)
212 unsigned getT2SORegOpValue(const MachineInstr &MI, unsigned Op)
214 unsigned getRotImmOpValue(const MachineInstr &MI, unsigned Op)
216 unsigned getImmMinusOneOpValue(const MachineInstr &MI, unsigned Op)
218 unsigned getT2AdrLabelOpValue(const MachineInstr &MI, unsigned Op)
220 unsigned getAddrMode6AddressOpValue(const MachineInstr &MI, unsigned Op)
222 unsigned getAddrMode6DupAddressOpValue(const MachineInstr &MI, unsigned Op)
224 unsigned getAddrMode6OffsetOpValue(const MachineInstr &MI, unsigned Op)
226 unsigned getBitfieldInvertedMaskOpValue(const MachineInstr &MI,
227 unsigned Op) const { return 0; }
228 unsigned getMsbOpValue(const MachineInstr &MI,
229 unsigned Op) const { return 0; }
230 uint32_t getLdStmModeOpValue(const MachineInstr &MI, unsigned OpIdx)
232 uint32_t getLdStSORegOpValue(const MachineInstr &MI, unsigned OpIdx)
235 unsigned getAddrModeImm12OpValue(const MachineInstr &MI, unsigned Op)
238 // {12} = (U)nsigned (add == '1', sub == '0')
240 const MachineOperand &MO = MI.getOperand(Op);
241 const MachineOperand &MO1 = MI.getOperand(Op + 1);
243 emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry);
246 unsigned Reg = getARMRegisterNumbering(MO.getReg());
247 int32_t Imm12 = MO1.getImm();
249 Binary = Imm12 & 0xfff;
252 Binary |= (Reg << 13);
256 unsigned getHiLo16ImmOpValue(const MachineInstr &MI, unsigned Op) const {
260 uint32_t getAddrMode2OpValue(const MachineInstr &MI, unsigned OpIdx)
262 uint32_t getAddrMode2OffsetOpValue(const MachineInstr &MI, unsigned OpIdx)
264 uint32_t getAddrMode3OffsetOpValue(const MachineInstr &MI, unsigned OpIdx)
266 uint32_t getAddrMode3OpValue(const MachineInstr &MI, unsigned Op)
268 uint32_t getAddrModeThumbSPOpValue(const MachineInstr &MI, unsigned Op)
270 uint32_t getAddrModeSOpValue(const MachineInstr &MI, unsigned Op)
272 uint32_t getAddrModeISOpValue(const MachineInstr &MI, unsigned Op)
274 uint32_t getAddrModePCOpValue(const MachineInstr &MI, unsigned Op)
276 uint32_t getAddrMode5OpValue(const MachineInstr &MI, unsigned Op) const {
278 // {12} = (U)nsigned (add == '1', sub == '0')
280 const MachineOperand &MO = MI.getOperand(Op);
281 const MachineOperand &MO1 = MI.getOperand(Op + 1);
283 emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry);
286 unsigned Reg = getARMRegisterNumbering(MO.getReg());
287 int32_t Imm12 = MO1.getImm();
289 // Special value for #-0
290 if (Imm12 == INT32_MIN)
293 // Immediate is always encoded as positive. The 'U' bit controls add vs
301 uint32_t Binary = Imm12 & 0xfff;
304 Binary |= (Reg << 13);
307 unsigned getNEONVcvtImm32OpValue(const MachineInstr &MI, unsigned Op)
310 unsigned getRegisterListOpValue(const MachineInstr &MI, unsigned Op)
313 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
314 /// machine operand requires relocation, record the relocation and return
316 unsigned getMovi32Value(const MachineInstr &MI,const MachineOperand &MO,
319 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
321 unsigned getShiftOp(unsigned Imm) const ;
323 /// Routines that handle operands which add machine relocations which are
324 /// fixed up by the relocation stage.
325 void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
326 bool MayNeedFarStub, bool Indirect,
327 intptr_t ACPV = 0) const;
328 void emitExternalSymbolAddress(const char *ES, unsigned Reloc) const;
329 void emitConstPoolAddress(unsigned CPI, unsigned Reloc) const;
330 void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const;
331 void emitMachineBasicBlock(MachineBasicBlock *BB, unsigned Reloc,
332 intptr_t JTBase = 0) const;
336 char ARMCodeEmitter::ID = 0;
338 /// createARMJITCodeEmitterPass - Return a pass that emits the collected ARM
339 /// code to the specified MCE object.
340 FunctionPass *llvm::createARMJITCodeEmitterPass(ARMBaseTargetMachine &TM,
341 JITCodeEmitter &JCE) {
342 return new ARMCodeEmitter(TM, JCE);
345 bool ARMCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
346 assert((MF.getTarget().getRelocationModel() != Reloc::Default ||
347 MF.getTarget().getRelocationModel() != Reloc::Static) &&
348 "JIT relocation model must be set to static or default!");
349 JTI = ((ARMTargetMachine &)MF.getTarget()).getJITInfo();
350 II = ((const ARMTargetMachine &)MF.getTarget()).getInstrInfo();
351 TD = ((const ARMTargetMachine &)MF.getTarget()).getTargetData();
352 Subtarget = &TM.getSubtarget<ARMSubtarget>();
353 MCPEs = &MF.getConstantPool()->getConstants();
355 if (MF.getJumpTableInfo()) MJTEs = &MF.getJumpTableInfo()->getJumpTables();
356 IsPIC = TM.getRelocationModel() == Reloc::PIC_;
357 IsThumb = MF.getInfo<ARMFunctionInfo>()->isThumbFunction();
358 JTI->Initialize(MF, IsPIC);
359 MMI = &getAnalysis<MachineModuleInfo>();
360 MCE.setModuleInfo(MMI);
363 DEBUG(errs() << "JITTing function '"
364 << MF.getFunction()->getName() << "'\n");
365 MCE.startFunction(MF);
366 for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
368 MCE.StartMachineBasicBlock(MBB);
369 for (MachineBasicBlock::const_iterator I = MBB->begin(), E = MBB->end();
373 } while (MCE.finishFunction(MF));
378 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
380 unsigned ARMCodeEmitter::getShiftOp(unsigned Imm) const {
381 switch (ARM_AM::getAM2ShiftOpc(Imm)) {
382 default: llvm_unreachable("Unknown shift opc!");
383 case ARM_AM::asr: return 2;
384 case ARM_AM::lsl: return 0;
385 case ARM_AM::lsr: return 1;
387 case ARM_AM::rrx: return 3;
392 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
393 /// machine operand requires relocation, record the relocation and return zero.
394 unsigned ARMCodeEmitter::getMovi32Value(const MachineInstr &MI,
395 const MachineOperand &MO,
397 assert(((Reloc == ARM::reloc_arm_movt) || (Reloc == ARM::reloc_arm_movw))
398 && "Relocation to this function should be for movt or movw");
401 return static_cast<unsigned>(MO.getImm());
402 else if (MO.isGlobal())
403 emitGlobalAddress(MO.getGlobal(), Reloc, true, false);
404 else if (MO.isSymbol())
405 emitExternalSymbolAddress(MO.getSymbolName(), Reloc);
407 emitMachineBasicBlock(MO.getMBB(), Reloc);
412 llvm_unreachable("Unsupported operand type for movw/movt");
417 /// getMachineOpValue - Return binary encoding of operand. If the machine
418 /// operand requires relocation, record the relocation and return zero.
419 unsigned ARMCodeEmitter::getMachineOpValue(const MachineInstr &MI,
420 const MachineOperand &MO) const {
422 return getARMRegisterNumbering(MO.getReg());
424 return static_cast<unsigned>(MO.getImm());
425 else if (MO.isGlobal())
426 emitGlobalAddress(MO.getGlobal(), ARM::reloc_arm_branch, true, false);
427 else if (MO.isSymbol())
428 emitExternalSymbolAddress(MO.getSymbolName(), ARM::reloc_arm_branch);
429 else if (MO.isCPI()) {
430 const TargetInstrDesc &TID = MI.getDesc();
431 // For VFP load, the immediate offset is multiplied by 4.
432 unsigned Reloc = ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPLdStFrm)
433 ? ARM::reloc_arm_vfp_cp_entry : ARM::reloc_arm_cp_entry;
434 emitConstPoolAddress(MO.getIndex(), Reloc);
435 } else if (MO.isJTI())
436 emitJumpTableAddress(MO.getIndex(), ARM::reloc_arm_relative);
438 emitMachineBasicBlock(MO.getMBB(), ARM::reloc_arm_branch);
440 llvm_unreachable("Unable to encode MachineOperand!");
444 /// emitGlobalAddress - Emit the specified address to the code stream.
446 void ARMCodeEmitter::emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
447 bool MayNeedFarStub, bool Indirect,
448 intptr_t ACPV) const {
449 MachineRelocation MR = Indirect
450 ? MachineRelocation::getIndirectSymbol(MCE.getCurrentPCOffset(), Reloc,
451 const_cast<GlobalValue *>(GV),
452 ACPV, MayNeedFarStub)
453 : MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc,
454 const_cast<GlobalValue *>(GV), ACPV,
456 MCE.addRelocation(MR);
459 /// emitExternalSymbolAddress - Arrange for the address of an external symbol to
460 /// be emitted to the current location in the function, and allow it to be PC
462 void ARMCodeEmitter::
463 emitExternalSymbolAddress(const char *ES, unsigned Reloc) const {
464 MCE.addRelocation(MachineRelocation::getExtSym(MCE.getCurrentPCOffset(),
468 /// emitConstPoolAddress - Arrange for the address of an constant pool
469 /// to be emitted to the current location in the function, and allow it to be PC
471 void ARMCodeEmitter::emitConstPoolAddress(unsigned CPI, unsigned Reloc) const {
472 // Tell JIT emitter we'll resolve the address.
473 MCE.addRelocation(MachineRelocation::getConstPool(MCE.getCurrentPCOffset(),
474 Reloc, CPI, 0, true));
477 /// emitJumpTableAddress - Arrange for the address of a jump table to
478 /// be emitted to the current location in the function, and allow it to be PC
480 void ARMCodeEmitter::
481 emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const {
482 MCE.addRelocation(MachineRelocation::getJumpTable(MCE.getCurrentPCOffset(),
483 Reloc, JTIndex, 0, true));
486 /// emitMachineBasicBlock - Emit the specified address basic block.
487 void ARMCodeEmitter::emitMachineBasicBlock(MachineBasicBlock *BB,
489 intptr_t JTBase) const {
490 MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(),
494 void ARMCodeEmitter::emitWordLE(unsigned Binary) {
495 DEBUG(errs() << " 0x";
496 errs().write_hex(Binary) << "\n");
497 MCE.emitWordLE(Binary);
500 void ARMCodeEmitter::emitDWordLE(uint64_t Binary) {
501 DEBUG(errs() << " 0x";
502 errs().write_hex(Binary) << "\n");
503 MCE.emitDWordLE(Binary);
506 void ARMCodeEmitter::emitInstruction(const MachineInstr &MI) {
507 DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << MI);
509 MCE.processDebugLoc(MI.getDebugLoc(), true);
511 ++NumEmitted; // Keep track of the # of mi's emitted
512 switch (MI.getDesc().TSFlags & ARMII::FormMask) {
514 llvm_unreachable("Unhandled instruction encoding format!");
518 if (MI.getOpcode() == ARM::LEApcrelJT) {
519 // Materialize jumptable address.
520 emitLEApcrelJTInstruction(MI);
523 llvm_unreachable("Unhandled instruction encoding!");
526 emitPseudoInstruction(MI);
529 case ARMII::DPSoRegFrm:
530 emitDataProcessingInstruction(MI);
534 emitLoadStoreInstruction(MI);
536 case ARMII::LdMiscFrm:
537 case ARMII::StMiscFrm:
538 emitMiscLoadStoreInstruction(MI);
540 case ARMII::LdStMulFrm:
541 emitLoadStoreMultipleInstruction(MI);
544 emitMulFrmInstruction(MI);
547 emitExtendInstruction(MI);
549 case ARMII::ArithMiscFrm:
550 emitMiscArithInstruction(MI);
553 emitSaturateInstruction(MI);
556 emitBranchInstruction(MI);
558 case ARMII::BrMiscFrm:
559 emitMiscBranchInstruction(MI);
562 case ARMII::VFPUnaryFrm:
563 case ARMII::VFPBinaryFrm:
564 emitVFPArithInstruction(MI);
566 case ARMII::VFPConv1Frm:
567 case ARMII::VFPConv2Frm:
568 case ARMII::VFPConv3Frm:
569 case ARMII::VFPConv4Frm:
570 case ARMII::VFPConv5Frm:
571 emitVFPConversionInstruction(MI);
573 case ARMII::VFPLdStFrm:
574 emitVFPLoadStoreInstruction(MI);
576 case ARMII::VFPLdStMulFrm:
577 emitVFPLoadStoreMultipleInstruction(MI);
580 // NEON instructions.
581 case ARMII::NGetLnFrm:
582 case ARMII::NSetLnFrm:
583 emitNEONLaneInstruction(MI);
586 emitNEONDupInstruction(MI);
588 case ARMII::N1RegModImmFrm:
589 emitNEON1RegModImmInstruction(MI);
591 case ARMII::N2RegFrm:
592 emitNEON2RegInstruction(MI);
594 case ARMII::N3RegFrm:
595 emitNEON3RegInstruction(MI);
598 MCE.processDebugLoc(MI.getDebugLoc(), false);
601 void ARMCodeEmitter::emitConstPoolInstruction(const MachineInstr &MI) {
602 unsigned CPI = MI.getOperand(0).getImm(); // CP instruction index.
603 unsigned CPIndex = MI.getOperand(1).getIndex(); // Actual cp entry index.
604 const MachineConstantPoolEntry &MCPE = (*MCPEs)[CPIndex];
606 // Remember the CONSTPOOL_ENTRY address for later relocation.
607 JTI->addConstantPoolEntryAddr(CPI, MCE.getCurrentPCValue());
609 // Emit constpool island entry. In most cases, the actual values will be
610 // resolved and relocated after code emission.
611 if (MCPE.isMachineConstantPoolEntry()) {
612 ARMConstantPoolValue *ACPV =
613 static_cast<ARMConstantPoolValue*>(MCPE.Val.MachineCPVal);
615 DEBUG(errs() << " ** ARM constant pool #" << CPI << " @ "
616 << (void*)MCE.getCurrentPCValue() << " " << *ACPV << '\n');
618 assert(ACPV->isGlobalValue() && "unsupported constant pool value");
619 const GlobalValue *GV = ACPV->getGV();
621 Reloc::Model RelocM = TM.getRelocationModel();
622 emitGlobalAddress(GV, ARM::reloc_arm_machine_cp_entry,
624 Subtarget->GVIsIndirectSymbol(GV, RelocM),
627 emitExternalSymbolAddress(ACPV->getSymbol(), ARM::reloc_arm_absolute);
631 const Constant *CV = MCPE.Val.ConstVal;
634 errs() << " ** Constant pool #" << CPI << " @ "
635 << (void*)MCE.getCurrentPCValue() << " ";
636 if (const Function *F = dyn_cast<Function>(CV))
637 errs() << F->getName();
643 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
644 emitGlobalAddress(GV, ARM::reloc_arm_absolute, isa<Function>(GV), false);
646 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
647 uint32_t Val = uint32_t(*CI->getValue().getRawData());
649 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
650 if (CFP->getType()->isFloatTy())
651 emitWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
652 else if (CFP->getType()->isDoubleTy())
653 emitDWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
655 llvm_unreachable("Unable to handle this constantpool entry!");
658 llvm_unreachable("Unable to handle this constantpool entry!");
663 void ARMCodeEmitter::emitMOVi32immInstruction(const MachineInstr &MI) {
664 const MachineOperand &MO0 = MI.getOperand(0);
665 const MachineOperand &MO1 = MI.getOperand(1);
667 // Emit the 'movw' instruction.
668 unsigned Binary = 0x30 << 20; // mov: Insts{27-20} = 0b00110000
670 unsigned Lo16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movw) & 0xFFFF;
672 // Set the conditional execution predicate.
673 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
676 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
678 // Encode imm16 as imm4:imm12
679 Binary |= Lo16 & 0xFFF; // Insts{11-0} = imm12
680 Binary |= ((Lo16 >> 12) & 0xF) << 16; // Insts{19-16} = imm4
683 unsigned Hi16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movt) >> 16;
684 // Emit the 'movt' instruction.
685 Binary = 0x34 << 20; // movt: Insts{27-20} = 0b00110100
687 // Set the conditional execution predicate.
688 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
691 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
693 // Encode imm16 as imm4:imm1, same as movw above.
694 Binary |= Hi16 & 0xFFF;
695 Binary |= ((Hi16 >> 12) & 0xF) << 16;
699 void ARMCodeEmitter::emitMOVi2piecesInstruction(const MachineInstr &MI) {
700 const MachineOperand &MO0 = MI.getOperand(0);
701 const MachineOperand &MO1 = MI.getOperand(1);
702 assert(MO1.isImm() && ARM_AM::isSOImmTwoPartVal(MO1.getImm()) &&
703 "Not a valid so_imm value!");
704 unsigned V1 = ARM_AM::getSOImmTwoPartFirst(MO1.getImm());
705 unsigned V2 = ARM_AM::getSOImmTwoPartSecond(MO1.getImm());
707 // Emit the 'mov' instruction.
708 unsigned Binary = 0xd << 21; // mov: Insts{24-21} = 0b1101
710 // Set the conditional execution predicate.
711 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
714 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
717 // Set bit I(25) to identify this is the immediate form of <shifter_op>
718 Binary |= 1 << ARMII::I_BitShift;
719 Binary |= getMachineSoImmOpValue(V1);
722 // Now the 'orr' instruction.
723 Binary = 0xc << 21; // orr: Insts{24-21} = 0b1100
725 // Set the conditional execution predicate.
726 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
729 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
732 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRnShift;
735 // Set bit I(25) to identify this is the immediate form of <shifter_op>
736 Binary |= 1 << ARMII::I_BitShift;
737 Binary |= getMachineSoImmOpValue(V2);
741 void ARMCodeEmitter::emitLEApcrelJTInstruction(const MachineInstr &MI) {
742 // It's basically add r, pc, (LJTI - $+8)
744 const TargetInstrDesc &TID = MI.getDesc();
746 // Emit the 'add' instruction.
747 unsigned Binary = 0x4 << 21; // add: Insts{24-21} = 0b0100
749 // Set the conditional execution predicate
750 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
752 // Encode S bit if MI modifies CPSR.
753 Binary |= getAddrModeSBit(MI, TID);
756 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
758 // Encode Rn which is PC.
759 Binary |= getARMRegisterNumbering(ARM::PC) << ARMII::RegRnShift;
761 // Encode the displacement.
762 Binary |= 1 << ARMII::I_BitShift;
763 emitJumpTableAddress(MI.getOperand(1).getIndex(), ARM::reloc_arm_jt_base);
768 void ARMCodeEmitter::emitPseudoMoveInstruction(const MachineInstr &MI) {
769 unsigned Opcode = MI.getDesc().Opcode;
771 // Part of binary is determined by TableGn.
772 unsigned Binary = getBinaryCodeForInstr(MI);
774 // Set the conditional execution predicate
775 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
777 // Encode S bit if MI modifies CPSR.
778 if (Opcode == ARM::MOVsrl_flag || Opcode == ARM::MOVsra_flag)
779 Binary |= 1 << ARMII::S_BitShift;
781 // Encode register def if there is one.
782 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
784 // Encode the shift operation.
791 case ARM::MOVsrl_flag:
793 Binary |= (0x2 << 4) | (1 << 7);
795 case ARM::MOVsra_flag:
797 Binary |= (0x4 << 4) | (1 << 7);
801 // Encode register Rm.
802 Binary |= getMachineOpValue(MI, 1);
807 void ARMCodeEmitter::addPCLabel(unsigned LabelID) {
808 DEBUG(errs() << " ** LPC" << LabelID << " @ "
809 << (void*)MCE.getCurrentPCValue() << '\n');
810 JTI->addPCLabelAddr(LabelID, MCE.getCurrentPCValue());
813 void ARMCodeEmitter::emitPseudoInstruction(const MachineInstr &MI) {
814 unsigned Opcode = MI.getDesc().Opcode;
817 llvm_unreachable("ARMCodeEmitter::emitPseudoInstruction");
819 case ARM::BMOVPCRX_CALL:
821 case ARM::BMOVPCRXr9_CALL: {
822 // First emit mov lr, pc
823 unsigned Binary = 0x01a0e00f;
824 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
827 // and then emit the branch.
828 emitMiscBranchInstruction(MI);
831 case TargetOpcode::INLINEASM: {
832 // We allow inline assembler nodes with empty bodies - they can
833 // implicitly define registers, which is ok for JIT.
834 if (MI.getOperand(0).getSymbolName()[0]) {
835 report_fatal_error("JIT does not support inline asm!");
839 case TargetOpcode::PROLOG_LABEL:
840 case TargetOpcode::EH_LABEL:
841 MCE.emitLabel(MI.getOperand(0).getMCSymbol());
843 case TargetOpcode::IMPLICIT_DEF:
844 case TargetOpcode::KILL:
847 case ARM::CONSTPOOL_ENTRY:
848 emitConstPoolInstruction(MI);
851 // Remember of the address of the PC label for relocation later.
852 addPCLabel(MI.getOperand(2).getImm());
853 // PICADD is just an add instruction that implicitly read pc.
854 emitDataProcessingInstruction(MI, 0, ARM::PC);
861 // Remember of the address of the PC label for relocation later.
862 addPCLabel(MI.getOperand(2).getImm());
863 // These are just load / store instructions that implicitly read pc.
864 emitLoadStoreInstruction(MI, 0, ARM::PC);
871 // Remember of the address of the PC label for relocation later.
872 addPCLabel(MI.getOperand(2).getImm());
873 // These are just load / store instructions that implicitly read pc.
874 emitMiscLoadStoreInstruction(MI, ARM::PC);
879 // Two instructions to materialize a constant.
880 if (Subtarget->hasV6T2Ops())
881 emitMOVi32immInstruction(MI);
883 emitMOVi2piecesInstruction(MI);
886 case ARM::LEApcrelJT:
887 // Materialize jumptable address.
888 emitLEApcrelJTInstruction(MI);
891 case ARM::MOVsrl_flag:
892 case ARM::MOVsra_flag:
893 emitPseudoMoveInstruction(MI);
898 unsigned ARMCodeEmitter::getMachineSoRegOpValue(const MachineInstr &MI,
899 const TargetInstrDesc &TID,
900 const MachineOperand &MO,
902 unsigned Binary = getMachineOpValue(MI, MO);
904 const MachineOperand &MO1 = MI.getOperand(OpIdx + 1);
905 const MachineOperand &MO2 = MI.getOperand(OpIdx + 2);
906 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO2.getImm());
908 // Encode the shift opcode.
910 unsigned Rs = MO1.getReg();
912 // Set shift operand (bit[7:4]).
917 // RRX - 0110 and bit[11:8] clear.
919 default: llvm_unreachable("Unknown shift opc!");
920 case ARM_AM::lsl: SBits = 0x1; break;
921 case ARM_AM::lsr: SBits = 0x3; break;
922 case ARM_AM::asr: SBits = 0x5; break;
923 case ARM_AM::ror: SBits = 0x7; break;
924 case ARM_AM::rrx: SBits = 0x6; break;
927 // Set shift operand (bit[6:4]).
933 default: llvm_unreachable("Unknown shift opc!");
934 case ARM_AM::lsl: SBits = 0x0; break;
935 case ARM_AM::lsr: SBits = 0x2; break;
936 case ARM_AM::asr: SBits = 0x4; break;
937 case ARM_AM::ror: SBits = 0x6; break;
940 Binary |= SBits << 4;
941 if (SOpc == ARM_AM::rrx)
944 // Encode the shift operation Rs or shift_imm (except rrx).
946 // Encode Rs bit[11:8].
947 assert(ARM_AM::getSORegOffset(MO2.getImm()) == 0);
948 return Binary | (getARMRegisterNumbering(Rs) << ARMII::RegRsShift);
951 // Encode shift_imm bit[11:7].
952 return Binary | ARM_AM::getSORegOffset(MO2.getImm()) << 7;
955 unsigned ARMCodeEmitter::getMachineSoImmOpValue(unsigned SoImm) {
956 int SoImmVal = ARM_AM::getSOImmVal(SoImm);
957 assert(SoImmVal != -1 && "Not a valid so_imm value!");
959 // Encode rotate_imm.
960 unsigned Binary = (ARM_AM::getSOImmValRot((unsigned)SoImmVal) >> 1)
961 << ARMII::SoRotImmShift;
964 Binary |= ARM_AM::getSOImmValImm((unsigned)SoImmVal);
968 unsigned ARMCodeEmitter::getAddrModeSBit(const MachineInstr &MI,
969 const TargetInstrDesc &TID) const {
970 for (unsigned i = MI.getNumOperands(), e = TID.getNumOperands(); i != e; --i){
971 const MachineOperand &MO = MI.getOperand(i-1);
972 if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR)
973 return 1 << ARMII::S_BitShift;
978 void ARMCodeEmitter::emitDataProcessingInstruction(const MachineInstr &MI,
980 unsigned ImplicitRn) {
981 const TargetInstrDesc &TID = MI.getDesc();
983 // Part of binary is determined by TableGn.
984 unsigned Binary = getBinaryCodeForInstr(MI);
986 // Set the conditional execution predicate
987 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
989 // Encode S bit if MI modifies CPSR.
990 Binary |= getAddrModeSBit(MI, TID);
992 // Encode register def if there is one.
993 unsigned NumDefs = TID.getNumDefs();
996 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
998 // Special handling for implicit use (e.g. PC).
999 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
1001 if (TID.Opcode == ARM::MOVi16) {
1002 // Get immediate from MI.
1003 unsigned Lo16 = getMovi32Value(MI, MI.getOperand(OpIdx),
1004 ARM::reloc_arm_movw);
1005 // Encode imm which is the same as in emitMOVi32immInstruction().
1006 Binary |= Lo16 & 0xFFF;
1007 Binary |= ((Lo16 >> 12) & 0xF) << 16;
1010 } else if(TID.Opcode == ARM::MOVTi16) {
1011 unsigned Hi16 = (getMovi32Value(MI, MI.getOperand(OpIdx),
1012 ARM::reloc_arm_movt) >> 16);
1013 Binary |= Hi16 & 0xFFF;
1014 Binary |= ((Hi16 >> 12) & 0xF) << 16;
1017 } else if ((TID.Opcode == ARM::BFC) || (TID.Opcode == ARM::BFI)) {
1018 uint32_t v = ~MI.getOperand(2).getImm();
1019 int32_t lsb = CountTrailingZeros_32(v);
1020 int32_t msb = (32 - CountLeadingZeros_32(v)) - 1;
1021 // Instr{20-16} = msb, Instr{11-7} = lsb
1022 Binary |= (msb & 0x1F) << 16;
1023 Binary |= (lsb & 0x1F) << 7;
1026 } else if ((TID.Opcode == ARM::UBFX) || (TID.Opcode == ARM::SBFX)) {
1027 // Encode Rn in Instr{0-3}
1028 Binary |= getMachineOpValue(MI, OpIdx++);
1030 uint32_t lsb = MI.getOperand(OpIdx++).getImm();
1031 uint32_t widthm1 = MI.getOperand(OpIdx++).getImm() - 1;
1033 // Instr{20-16} = widthm1, Instr{11-7} = lsb
1034 Binary |= (widthm1 & 0x1F) << 16;
1035 Binary |= (lsb & 0x1F) << 7;
1040 // If this is a two-address operand, skip it. e.g. MOVCCr operand 1.
1041 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1044 // Encode first non-shifter register operand if there is one.
1045 bool isUnary = TID.TSFlags & ARMII::UnaryDP;
1048 // Special handling for implicit use (e.g. PC).
1049 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1051 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRnShift;
1056 // Encode shifter operand.
1057 const MachineOperand &MO = MI.getOperand(OpIdx);
1058 if ((TID.TSFlags & ARMII::FormMask) == ARMII::DPSoRegFrm) {
1060 emitWordLE(Binary | getMachineSoRegOpValue(MI, TID, MO, OpIdx));
1065 // Encode register Rm.
1066 emitWordLE(Binary | getARMRegisterNumbering(MO.getReg()));
1071 Binary |= getMachineSoImmOpValue((unsigned)MO.getImm());
1076 void ARMCodeEmitter::emitLoadStoreInstruction(const MachineInstr &MI,
1077 unsigned ImplicitRd,
1078 unsigned ImplicitRn) {
1079 const TargetInstrDesc &TID = MI.getDesc();
1080 unsigned Form = TID.TSFlags & ARMII::FormMask;
1081 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1083 // Part of binary is determined by TableGn.
1084 unsigned Binary = getBinaryCodeForInstr(MI);
1086 // If this is an LDRi12, STRi12 or LDRcp, nothing more needs be done.
1087 if (MI.getOpcode() == ARM::LDRi12 || MI.getOpcode() == ARM::LDRcp ||
1088 MI.getOpcode() == ARM::STRi12) {
1093 // Set the conditional execution predicate
1094 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1098 // Operand 0 of a pre- and post-indexed store is the address base
1099 // writeback. Skip it.
1100 bool Skipped = false;
1101 if (IsPrePost && Form == ARMII::StFrm) {
1106 // Set first operand
1108 // Special handling for implicit use (e.g. PC).
1109 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
1111 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1113 // Set second operand
1115 // Special handling for implicit use (e.g. PC).
1116 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1118 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1120 // If this is a two-address operand, skip it. e.g. LDR_PRE.
1121 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1124 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1125 unsigned AM2Opc = (ImplicitRn == ARM::PC)
1126 ? 0 : MI.getOperand(OpIdx+1).getImm();
1128 // Set bit U(23) according to sign of immed value (positive or negative).
1129 Binary |= ((ARM_AM::getAM2Op(AM2Opc) == ARM_AM::add ? 1 : 0) <<
1131 if (!MO2.getReg()) { // is immediate
1132 if (ARM_AM::getAM2Offset(AM2Opc))
1133 // Set the value of offset_12 field
1134 Binary |= ARM_AM::getAM2Offset(AM2Opc);
1139 // Set bit I(25), because this is not in immediate encoding.
1140 Binary |= 1 << ARMII::I_BitShift;
1141 assert(TargetRegisterInfo::isPhysicalRegister(MO2.getReg()));
1142 // Set bit[3:0] to the corresponding Rm register
1143 Binary |= getARMRegisterNumbering(MO2.getReg());
1145 // If this instr is in scaled register offset/index instruction, set
1146 // shift_immed(bit[11:7]) and shift(bit[6:5]) fields.
1147 if (unsigned ShImm = ARM_AM::getAM2Offset(AM2Opc)) {
1148 Binary |= getShiftOp(AM2Opc) << ARMII::ShiftImmShift; // shift
1149 Binary |= ShImm << ARMII::ShiftShift; // shift_immed
1155 void ARMCodeEmitter::emitMiscLoadStoreInstruction(const MachineInstr &MI,
1156 unsigned ImplicitRn) {
1157 const TargetInstrDesc &TID = MI.getDesc();
1158 unsigned Form = TID.TSFlags & ARMII::FormMask;
1159 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1161 // Part of binary is determined by TableGn.
1162 unsigned Binary = getBinaryCodeForInstr(MI);
1164 // Set the conditional execution predicate
1165 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1169 // Operand 0 of a pre- and post-indexed store is the address base
1170 // writeback. Skip it.
1171 bool Skipped = false;
1172 if (IsPrePost && Form == ARMII::StMiscFrm) {
1177 // Set first operand
1178 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1180 // Skip LDRD and STRD's second operand.
1181 if (TID.Opcode == ARM::LDRD || TID.Opcode == ARM::STRD)
1184 // Set second operand
1186 // Special handling for implicit use (e.g. PC).
1187 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1189 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1191 // If this is a two-address operand, skip it. e.g. LDRH_POST.
1192 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1195 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1196 unsigned AM3Opc = (ImplicitRn == ARM::PC)
1197 ? 0 : MI.getOperand(OpIdx+1).getImm();
1199 // Set bit U(23) according to sign of immed value (positive or negative)
1200 Binary |= ((ARM_AM::getAM3Op(AM3Opc) == ARM_AM::add ? 1 : 0) <<
1203 // If this instr is in register offset/index encoding, set bit[3:0]
1204 // to the corresponding Rm register.
1206 Binary |= getARMRegisterNumbering(MO2.getReg());
1211 // This instr is in immediate offset/index encoding, set bit 22 to 1.
1212 Binary |= 1 << ARMII::AM3_I_BitShift;
1213 if (unsigned ImmOffs = ARM_AM::getAM3Offset(AM3Opc)) {
1215 Binary |= (ImmOffs >> 4) << ARMII::ImmHiShift; // immedH
1216 Binary |= (ImmOffs & 0xF); // immedL
1222 static unsigned getAddrModeUPBits(unsigned Mode) {
1223 unsigned Binary = 0;
1225 // Set addressing mode by modifying bits U(23) and P(24)
1226 // IA - Increment after - bit U = 1 and bit P = 0
1227 // IB - Increment before - bit U = 1 and bit P = 1
1228 // DA - Decrement after - bit U = 0 and bit P = 0
1229 // DB - Decrement before - bit U = 0 and bit P = 1
1231 default: llvm_unreachable("Unknown addressing sub-mode!");
1232 case ARM_AM::da: break;
1233 case ARM_AM::db: Binary |= 0x1 << ARMII::P_BitShift; break;
1234 case ARM_AM::ia: Binary |= 0x1 << ARMII::U_BitShift; break;
1235 case ARM_AM::ib: Binary |= 0x3 << ARMII::U_BitShift; break;
1241 void ARMCodeEmitter::emitLoadStoreMultipleInstruction(const MachineInstr &MI) {
1242 const TargetInstrDesc &TID = MI.getDesc();
1243 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1245 // Part of binary is determined by TableGn.
1246 unsigned Binary = getBinaryCodeForInstr(MI);
1248 // Set the conditional execution predicate
1249 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1251 // Skip operand 0 of an instruction with base register update.
1256 // Set base address operand
1257 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1259 // Set addressing mode by modifying bits U(23) and P(24)
1260 ARM_AM::AMSubMode Mode = ARM_AM::getLoadStoreMultipleSubMode(MI.getOpcode());
1261 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(Mode));
1265 Binary |= 0x1 << ARMII::W_BitShift;
1268 for (unsigned i = OpIdx+2, e = MI.getNumOperands(); i != e; ++i) {
1269 const MachineOperand &MO = MI.getOperand(i);
1270 if (!MO.isReg() || MO.isImplicit())
1272 unsigned RegNum = getARMRegisterNumbering(MO.getReg());
1273 assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
1275 Binary |= 0x1 << RegNum;
1281 void ARMCodeEmitter::emitMulFrmInstruction(const MachineInstr &MI) {
1282 const TargetInstrDesc &TID = MI.getDesc();
1284 // Part of binary is determined by TableGn.
1285 unsigned Binary = getBinaryCodeForInstr(MI);
1287 // Set the conditional execution predicate
1288 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1290 // Encode S bit if MI modifies CPSR.
1291 Binary |= getAddrModeSBit(MI, TID);
1293 // 32x32->64bit operations have two destination registers. The number
1294 // of register definitions will tell us if that's what we're dealing with.
1296 if (TID.getNumDefs() == 2)
1297 Binary |= getMachineOpValue (MI, OpIdx++) << ARMII::RegRdLoShift;
1300 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdHiShift;
1303 Binary |= getMachineOpValue(MI, OpIdx++);
1306 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRsShift;
1308 // Many multiple instructions (e.g. MLA) have three src operands. Encode
1309 // it as Rn (for multiply, that's in the same offset as RdLo.
1310 if (TID.getNumOperands() > OpIdx &&
1311 !TID.OpInfo[OpIdx].isPredicate() &&
1312 !TID.OpInfo[OpIdx].isOptionalDef())
1313 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRdLoShift;
1318 void ARMCodeEmitter::emitExtendInstruction(const MachineInstr &MI) {
1319 const TargetInstrDesc &TID = MI.getDesc();
1321 // Part of binary is determined by TableGn.
1322 unsigned Binary = getBinaryCodeForInstr(MI);
1324 // Set the conditional execution predicate
1325 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1330 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1332 const MachineOperand &MO1 = MI.getOperand(OpIdx++);
1333 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1335 // Two register operand form.
1337 Binary |= getMachineOpValue(MI, MO1) << ARMII::RegRnShift;
1340 Binary |= getMachineOpValue(MI, MO2);
1343 Binary |= getMachineOpValue(MI, MO1);
1346 // Encode rot imm (0, 8, 16, or 24) if it has a rotate immediate operand.
1347 if (MI.getOperand(OpIdx).isImm() &&
1348 !TID.OpInfo[OpIdx].isPredicate() &&
1349 !TID.OpInfo[OpIdx].isOptionalDef())
1350 Binary |= (getMachineOpValue(MI, OpIdx) / 8) << ARMII::ExtRotImmShift;
1355 void ARMCodeEmitter::emitMiscArithInstruction(const MachineInstr &MI) {
1356 const TargetInstrDesc &TID = MI.getDesc();
1358 // Part of binary is determined by TableGn.
1359 unsigned Binary = getBinaryCodeForInstr(MI);
1361 // Set the conditional execution predicate
1362 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1367 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1369 const MachineOperand &MO = MI.getOperand(OpIdx++);
1370 if (OpIdx == TID.getNumOperands() ||
1371 TID.OpInfo[OpIdx].isPredicate() ||
1372 TID.OpInfo[OpIdx].isOptionalDef()) {
1373 // Encode Rm and it's done.
1374 Binary |= getMachineOpValue(MI, MO);
1380 Binary |= getMachineOpValue(MI, MO) << ARMII::RegRnShift;
1383 Binary |= getMachineOpValue(MI, OpIdx++);
1385 // Encode shift_imm.
1386 unsigned ShiftAmt = MI.getOperand(OpIdx).getImm();
1387 if (TID.Opcode == ARM::PKHTB) {
1388 assert(ShiftAmt != 0 && "PKHTB shift_imm is 0!");
1392 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1393 Binary |= ShiftAmt << ARMII::ShiftShift;
1398 void ARMCodeEmitter::emitSaturateInstruction(const MachineInstr &MI) {
1399 const TargetInstrDesc &TID = MI.getDesc();
1401 // Part of binary is determined by TableGen.
1402 unsigned Binary = getBinaryCodeForInstr(MI);
1404 // Set the conditional execution predicate
1405 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1408 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
1410 // Encode saturate bit position.
1411 unsigned Pos = MI.getOperand(1).getImm();
1412 if (TID.Opcode == ARM::SSAT || TID.Opcode == ARM::SSAT16)
1414 assert((Pos < 16 || (Pos < 32 &&
1415 TID.Opcode != ARM::SSAT16 &&
1416 TID.Opcode != ARM::USAT16)) &&
1417 "saturate bit position out of range");
1418 Binary |= Pos << 16;
1421 Binary |= getMachineOpValue(MI, 2);
1423 // Encode shift_imm.
1424 if (TID.getNumOperands() == 4) {
1425 unsigned ShiftOp = MI.getOperand(3).getImm();
1426 ARM_AM::ShiftOpc Opc = ARM_AM::getSORegShOp(ShiftOp);
1427 if (Opc == ARM_AM::asr)
1429 unsigned ShiftAmt = MI.getOperand(3).getImm();
1430 if (ShiftAmt == 32 && Opc == ARM_AM::asr)
1432 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1433 Binary |= ShiftAmt << ARMII::ShiftShift;
1439 void ARMCodeEmitter::emitBranchInstruction(const MachineInstr &MI) {
1440 const TargetInstrDesc &TID = MI.getDesc();
1442 if (TID.Opcode == ARM::TPsoft) {
1443 llvm_unreachable("ARM::TPsoft FIXME"); // FIXME
1446 // Part of binary is determined by TableGn.
1447 unsigned Binary = getBinaryCodeForInstr(MI);
1449 // Set the conditional execution predicate
1450 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1452 // Set signed_immed_24 field
1453 Binary |= getMachineOpValue(MI, 0);
1458 void ARMCodeEmitter::emitInlineJumpTable(unsigned JTIndex) {
1459 // Remember the base address of the inline jump table.
1460 uintptr_t JTBase = MCE.getCurrentPCValue();
1461 JTI->addJumpTableBaseAddr(JTIndex, JTBase);
1462 DEBUG(errs() << " ** Jump Table #" << JTIndex << " @ " << (void*)JTBase
1465 // Now emit the jump table entries.
1466 const std::vector<MachineBasicBlock*> &MBBs = (*MJTEs)[JTIndex].MBBs;
1467 for (unsigned i = 0, e = MBBs.size(); i != e; ++i) {
1469 // DestBB address - JT base.
1470 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_pic_jt, JTBase);
1472 // Absolute DestBB address.
1473 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_absolute);
1478 void ARMCodeEmitter::emitMiscBranchInstruction(const MachineInstr &MI) {
1479 const TargetInstrDesc &TID = MI.getDesc();
1481 // Handle jump tables.
1482 if (TID.Opcode == ARM::BR_JTr || TID.Opcode == ARM::BR_JTadd) {
1483 // First emit a ldr pc, [] instruction.
1484 emitDataProcessingInstruction(MI, ARM::PC);
1486 // Then emit the inline jump table.
1488 (TID.Opcode == ARM::BR_JTr)
1489 ? MI.getOperand(1).getIndex() : MI.getOperand(2).getIndex();
1490 emitInlineJumpTable(JTIndex);
1492 } else if (TID.Opcode == ARM::BR_JTm) {
1493 // First emit a ldr pc, [] instruction.
1494 emitLoadStoreInstruction(MI, ARM::PC);
1496 // Then emit the inline jump table.
1497 emitInlineJumpTable(MI.getOperand(3).getIndex());
1501 // Part of binary is determined by TableGn.
1502 unsigned Binary = getBinaryCodeForInstr(MI);
1504 // Set the conditional execution predicate
1505 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1507 if (TID.Opcode == ARM::BX_RET || TID.Opcode == ARM::MOVPCLR)
1508 // The return register is LR.
1509 Binary |= getARMRegisterNumbering(ARM::LR);
1511 // otherwise, set the return register
1512 Binary |= getMachineOpValue(MI, 0);
1517 static unsigned encodeVFPRd(const MachineInstr &MI, unsigned OpIdx) {
1518 unsigned RegD = MI.getOperand(OpIdx).getReg();
1519 unsigned Binary = 0;
1520 bool isSPVFP = ARM::SPRRegisterClass->contains(RegD);
1521 RegD = getARMRegisterNumbering(RegD);
1523 Binary |= RegD << ARMII::RegRdShift;
1525 Binary |= ((RegD & 0x1E) >> 1) << ARMII::RegRdShift;
1526 Binary |= (RegD & 0x01) << ARMII::D_BitShift;
1531 static unsigned encodeVFPRn(const MachineInstr &MI, unsigned OpIdx) {
1532 unsigned RegN = MI.getOperand(OpIdx).getReg();
1533 unsigned Binary = 0;
1534 bool isSPVFP = ARM::SPRRegisterClass->contains(RegN);
1535 RegN = getARMRegisterNumbering(RegN);
1537 Binary |= RegN << ARMII::RegRnShift;
1539 Binary |= ((RegN & 0x1E) >> 1) << ARMII::RegRnShift;
1540 Binary |= (RegN & 0x01) << ARMII::N_BitShift;
1545 static unsigned encodeVFPRm(const MachineInstr &MI, unsigned OpIdx) {
1546 unsigned RegM = MI.getOperand(OpIdx).getReg();
1547 unsigned Binary = 0;
1548 bool isSPVFP = ARM::SPRRegisterClass->contains(RegM);
1549 RegM = getARMRegisterNumbering(RegM);
1553 Binary |= ((RegM & 0x1E) >> 1);
1554 Binary |= (RegM & 0x01) << ARMII::M_BitShift;
1559 void ARMCodeEmitter::emitVFPArithInstruction(const MachineInstr &MI) {
1560 const TargetInstrDesc &TID = MI.getDesc();
1562 // Part of binary is determined by TableGn.
1563 unsigned Binary = getBinaryCodeForInstr(MI);
1565 // Set the conditional execution predicate
1566 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1569 assert((Binary & ARMII::D_BitShift) == 0 &&
1570 (Binary & ARMII::N_BitShift) == 0 &&
1571 (Binary & ARMII::M_BitShift) == 0 && "VFP encoding bug!");
1574 Binary |= encodeVFPRd(MI, OpIdx++);
1576 // If this is a two-address operand, skip it, e.g. FMACD.
1577 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1581 if ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPBinaryFrm)
1582 Binary |= encodeVFPRn(MI, OpIdx++);
1584 if (OpIdx == TID.getNumOperands() ||
1585 TID.OpInfo[OpIdx].isPredicate() ||
1586 TID.OpInfo[OpIdx].isOptionalDef()) {
1587 // FCMPEZD etc. has only one operand.
1593 Binary |= encodeVFPRm(MI, OpIdx);
1598 void ARMCodeEmitter::emitVFPConversionInstruction(const MachineInstr &MI) {
1599 const TargetInstrDesc &TID = MI.getDesc();
1600 unsigned Form = TID.TSFlags & ARMII::FormMask;
1602 // Part of binary is determined by TableGn.
1603 unsigned Binary = getBinaryCodeForInstr(MI);
1605 // Set the conditional execution predicate
1606 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1610 case ARMII::VFPConv1Frm:
1611 case ARMII::VFPConv2Frm:
1612 case ARMII::VFPConv3Frm:
1614 Binary |= encodeVFPRd(MI, 0);
1616 case ARMII::VFPConv4Frm:
1618 Binary |= encodeVFPRn(MI, 0);
1620 case ARMII::VFPConv5Frm:
1622 Binary |= encodeVFPRm(MI, 0);
1628 case ARMII::VFPConv1Frm:
1630 Binary |= encodeVFPRm(MI, 1);
1632 case ARMII::VFPConv2Frm:
1633 case ARMII::VFPConv3Frm:
1635 Binary |= encodeVFPRn(MI, 1);
1637 case ARMII::VFPConv4Frm:
1638 case ARMII::VFPConv5Frm:
1640 Binary |= encodeVFPRd(MI, 1);
1644 if (Form == ARMII::VFPConv5Frm)
1646 Binary |= encodeVFPRn(MI, 2);
1647 else if (Form == ARMII::VFPConv3Frm)
1649 Binary |= encodeVFPRm(MI, 2);
1654 void ARMCodeEmitter::emitVFPLoadStoreInstruction(const MachineInstr &MI) {
1655 // Part of binary is determined by TableGn.
1656 unsigned Binary = getBinaryCodeForInstr(MI);
1658 // Set the conditional execution predicate
1659 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1664 Binary |= encodeVFPRd(MI, OpIdx++);
1666 // Encode address base.
1667 const MachineOperand &Base = MI.getOperand(OpIdx++);
1668 Binary |= getMachineOpValue(MI, Base) << ARMII::RegRnShift;
1670 // If there is a non-zero immediate offset, encode it.
1672 const MachineOperand &Offset = MI.getOperand(OpIdx);
1673 if (unsigned ImmOffs = ARM_AM::getAM5Offset(Offset.getImm())) {
1674 if (ARM_AM::getAM5Op(Offset.getImm()) == ARM_AM::add)
1675 Binary |= 1 << ARMII::U_BitShift;
1682 // If immediate offset is omitted, default to +0.
1683 Binary |= 1 << ARMII::U_BitShift;
1689 ARMCodeEmitter::emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI) {
1690 const TargetInstrDesc &TID = MI.getDesc();
1691 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1693 // Part of binary is determined by TableGn.
1694 unsigned Binary = getBinaryCodeForInstr(MI);
1696 // Set the conditional execution predicate
1697 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1699 // Skip operand 0 of an instruction with base register update.
1704 // Set base address operand
1705 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1707 // Set addressing mode by modifying bits U(23) and P(24)
1708 ARM_AM::AMSubMode Mode = ARM_AM::getLoadStoreMultipleSubMode(MI.getOpcode());
1709 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(Mode));
1713 Binary |= 0x1 << ARMII::W_BitShift;
1715 // First register is encoded in Dd.
1716 Binary |= encodeVFPRd(MI, OpIdx+2);
1718 // Count the number of registers.
1719 unsigned NumRegs = 1;
1720 for (unsigned i = OpIdx+3, e = MI.getNumOperands(); i != e; ++i) {
1721 const MachineOperand &MO = MI.getOperand(i);
1722 if (!MO.isReg() || MO.isImplicit())
1726 // Bit 8 will be set if <list> is consecutive 64-bit registers (e.g., D0)
1727 // Otherwise, it will be 0, in the case of 32-bit registers.
1729 Binary |= NumRegs * 2;
1736 static unsigned encodeNEONRd(const MachineInstr &MI, unsigned OpIdx) {
1737 unsigned RegD = MI.getOperand(OpIdx).getReg();
1738 unsigned Binary = 0;
1739 RegD = getARMRegisterNumbering(RegD);
1740 Binary |= (RegD & 0xf) << ARMII::RegRdShift;
1741 Binary |= ((RegD >> 4) & 1) << ARMII::D_BitShift;
1745 static unsigned encodeNEONRn(const MachineInstr &MI, unsigned OpIdx) {
1746 unsigned RegN = MI.getOperand(OpIdx).getReg();
1747 unsigned Binary = 0;
1748 RegN = getARMRegisterNumbering(RegN);
1749 Binary |= (RegN & 0xf) << ARMII::RegRnShift;
1750 Binary |= ((RegN >> 4) & 1) << ARMII::N_BitShift;
1754 static unsigned encodeNEONRm(const MachineInstr &MI, unsigned OpIdx) {
1755 unsigned RegM = MI.getOperand(OpIdx).getReg();
1756 unsigned Binary = 0;
1757 RegM = getARMRegisterNumbering(RegM);
1758 Binary |= (RegM & 0xf);
1759 Binary |= ((RegM >> 4) & 1) << ARMII::M_BitShift;
1763 /// convertNEONDataProcToThumb - Convert the ARM mode encoding for a NEON
1764 /// data-processing instruction to the corresponding Thumb encoding.
1765 static unsigned convertNEONDataProcToThumb(unsigned Binary) {
1766 assert((Binary & 0xfe000000) == 0xf2000000 &&
1767 "not an ARM NEON data-processing instruction");
1768 unsigned UBit = (Binary >> 24) & 1;
1769 return 0xef000000 | (UBit << 28) | (Binary & 0xffffff);
1772 void ARMCodeEmitter::emitNEONLaneInstruction(const MachineInstr &MI) {
1773 unsigned Binary = getBinaryCodeForInstr(MI);
1775 unsigned RegTOpIdx, RegNOpIdx, LnOpIdx;
1776 const TargetInstrDesc &TID = MI.getDesc();
1777 if ((TID.TSFlags & ARMII::FormMask) == ARMII::NGetLnFrm) {
1781 } else { // ARMII::NSetLnFrm
1787 // Set the conditional execution predicate
1788 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1790 unsigned RegT = MI.getOperand(RegTOpIdx).getReg();
1791 RegT = getARMRegisterNumbering(RegT);
1792 Binary |= (RegT << ARMII::RegRdShift);
1793 Binary |= encodeNEONRn(MI, RegNOpIdx);
1796 if ((Binary & (1 << 22)) != 0)
1797 LaneShift = 0; // 8-bit elements
1798 else if ((Binary & (1 << 5)) != 0)
1799 LaneShift = 1; // 16-bit elements
1801 LaneShift = 2; // 32-bit elements
1803 unsigned Lane = MI.getOperand(LnOpIdx).getImm() << LaneShift;
1804 unsigned Opc1 = Lane >> 2;
1805 unsigned Opc2 = Lane & 3;
1806 assert((Opc1 & 3) == 0 && "out-of-range lane number operand");
1807 Binary |= (Opc1 << 21);
1808 Binary |= (Opc2 << 5);
1813 void ARMCodeEmitter::emitNEONDupInstruction(const MachineInstr &MI) {
1814 unsigned Binary = getBinaryCodeForInstr(MI);
1816 // Set the conditional execution predicate
1817 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1819 unsigned RegT = MI.getOperand(1).getReg();
1820 RegT = getARMRegisterNumbering(RegT);
1821 Binary |= (RegT << ARMII::RegRdShift);
1822 Binary |= encodeNEONRn(MI, 0);
1826 void ARMCodeEmitter::emitNEON1RegModImmInstruction(const MachineInstr &MI) {
1827 unsigned Binary = getBinaryCodeForInstr(MI);
1828 // Destination register is encoded in Dd.
1829 Binary |= encodeNEONRd(MI, 0);
1830 // Immediate fields: Op, Cmode, I, Imm3, Imm4
1831 unsigned Imm = MI.getOperand(1).getImm();
1832 unsigned Op = (Imm >> 12) & 1;
1833 unsigned Cmode = (Imm >> 8) & 0xf;
1834 unsigned I = (Imm >> 7) & 1;
1835 unsigned Imm3 = (Imm >> 4) & 0x7;
1836 unsigned Imm4 = Imm & 0xf;
1837 Binary |= (I << 24) | (Imm3 << 16) | (Cmode << 8) | (Op << 5) | Imm4;
1839 Binary = convertNEONDataProcToThumb(Binary);
1843 void ARMCodeEmitter::emitNEON2RegInstruction(const MachineInstr &MI) {
1844 const TargetInstrDesc &TID = MI.getDesc();
1845 unsigned Binary = getBinaryCodeForInstr(MI);
1846 // Destination register is encoded in Dd; source register in Dm.
1848 Binary |= encodeNEONRd(MI, OpIdx++);
1849 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1851 Binary |= encodeNEONRm(MI, OpIdx);
1853 Binary = convertNEONDataProcToThumb(Binary);
1854 // FIXME: This does not handle VDUPfdf or VDUPfqf.
1858 void ARMCodeEmitter::emitNEON3RegInstruction(const MachineInstr &MI) {
1859 const TargetInstrDesc &TID = MI.getDesc();
1860 unsigned Binary = getBinaryCodeForInstr(MI);
1861 // Destination register is encoded in Dd; source registers in Dn and Dm.
1863 Binary |= encodeNEONRd(MI, OpIdx++);
1864 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1866 Binary |= encodeNEONRn(MI, OpIdx++);
1867 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1869 Binary |= encodeNEONRm(MI, OpIdx);
1871 Binary = convertNEONDataProcToThumb(Binary);
1872 // FIXME: This does not handle VMOVDneon or VMOVQ.
1876 #include "ARMGenCodeEmitter.inc"