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 getARMBranchTargetOpValue(const MachineInstr &MI, unsigned Op)
192 unsigned getCCOutOpValue(const MachineInstr &MI, unsigned Op)
194 unsigned getSOImmOpValue(const MachineInstr &MI, unsigned Op)
196 unsigned getT2SOImmOpValue(const MachineInstr &MI, unsigned Op)
198 unsigned getSORegOpValue(const MachineInstr &MI, unsigned Op)
200 unsigned getThumbAddrModeRegRegOpValue(const MachineInstr &MI, unsigned Op)
202 unsigned getT2AddrModeImm12OpValue(const MachineInstr &MI, unsigned Op)
204 unsigned getT2AddrModeImm8OpValue(const MachineInstr &MI, unsigned Op)
206 unsigned getT2AddrModeImm8s4OpValue(const MachineInstr &MI, unsigned Op)
208 unsigned getT2AddrModeImm8OffsetOpValue(const MachineInstr &MI, unsigned Op)
210 unsigned getT2AddrModeImm12OffsetOpValue(const MachineInstr &MI,unsigned Op)
212 unsigned getT2AddrModeSORegOpValue(const MachineInstr &MI, unsigned Op)
214 unsigned getT2SORegOpValue(const MachineInstr &MI, unsigned Op)
216 unsigned getRotImmOpValue(const MachineInstr &MI, unsigned Op)
218 unsigned getImmMinusOneOpValue(const MachineInstr &MI, unsigned Op)
220 unsigned getT2AdrLabelOpValue(const MachineInstr &MI, unsigned Op)
222 unsigned getAddrMode6AddressOpValue(const MachineInstr &MI, unsigned Op)
224 unsigned getAddrMode6DupAddressOpValue(const MachineInstr &MI, unsigned Op)
226 unsigned getAddrMode6OffsetOpValue(const MachineInstr &MI, unsigned Op)
228 unsigned getBitfieldInvertedMaskOpValue(const MachineInstr &MI,
229 unsigned Op) const { return 0; }
230 unsigned getMsbOpValue(const MachineInstr &MI,
231 unsigned Op) const { return 0; }
232 uint32_t getLdStmModeOpValue(const MachineInstr &MI, unsigned OpIdx)
234 uint32_t getLdStSORegOpValue(const MachineInstr &MI, unsigned OpIdx)
237 unsigned getAddrModeImm12OpValue(const MachineInstr &MI, unsigned Op)
240 // {12} = (U)nsigned (add == '1', sub == '0')
242 const MachineOperand &MO = MI.getOperand(Op);
243 const MachineOperand &MO1 = MI.getOperand(Op + 1);
245 emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry);
248 unsigned Reg = getARMRegisterNumbering(MO.getReg());
249 int32_t Imm12 = MO1.getImm();
251 Binary = Imm12 & 0xfff;
254 Binary |= (Reg << 13);
258 unsigned getHiLo16ImmOpValue(const MachineInstr &MI, unsigned Op) const {
262 uint32_t getAddrMode2OpValue(const MachineInstr &MI, unsigned OpIdx)
264 uint32_t getAddrMode2OffsetOpValue(const MachineInstr &MI, unsigned OpIdx)
266 uint32_t getAddrMode3OffsetOpValue(const MachineInstr &MI, unsigned OpIdx)
268 uint32_t getAddrMode3OpValue(const MachineInstr &MI, unsigned Op)
270 uint32_t getAddrModeThumbSPOpValue(const MachineInstr &MI, unsigned Op)
272 uint32_t getAddrModeSOpValue(const MachineInstr &MI, unsigned Op)
274 uint32_t getAddrModeISOpValue(const MachineInstr &MI, unsigned Op)
276 uint32_t getAddrModePCOpValue(const MachineInstr &MI, unsigned Op)
278 uint32_t getAddrMode5OpValue(const MachineInstr &MI, unsigned Op) const {
280 // {12} = (U)nsigned (add == '1', sub == '0')
282 const MachineOperand &MO = MI.getOperand(Op);
283 const MachineOperand &MO1 = MI.getOperand(Op + 1);
285 emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry);
288 unsigned Reg = getARMRegisterNumbering(MO.getReg());
289 int32_t Imm12 = MO1.getImm();
291 // Special value for #-0
292 if (Imm12 == INT32_MIN)
295 // Immediate is always encoded as positive. The 'U' bit controls add vs
303 uint32_t Binary = Imm12 & 0xfff;
306 Binary |= (Reg << 13);
309 unsigned getNEONVcvtImm32OpValue(const MachineInstr &MI, unsigned Op)
312 unsigned getRegisterListOpValue(const MachineInstr &MI, unsigned Op)
315 unsigned getShiftRight8Imm(const MachineInstr &MI, unsigned Op)
317 unsigned getShiftRight16Imm(const MachineInstr &MI, unsigned Op)
319 unsigned getShiftRight32Imm(const MachineInstr &MI, unsigned Op)
321 unsigned getShiftRight64Imm(const MachineInstr &MI, unsigned Op)
324 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
325 /// machine operand requires relocation, record the relocation and return
327 unsigned getMovi32Value(const MachineInstr &MI,const MachineOperand &MO,
330 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
332 unsigned getShiftOp(unsigned Imm) const ;
334 /// Routines that handle operands which add machine relocations which are
335 /// fixed up by the relocation stage.
336 void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
337 bool MayNeedFarStub, bool Indirect,
338 intptr_t ACPV = 0) const;
339 void emitExternalSymbolAddress(const char *ES, unsigned Reloc) const;
340 void emitConstPoolAddress(unsigned CPI, unsigned Reloc) const;
341 void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const;
342 void emitMachineBasicBlock(MachineBasicBlock *BB, unsigned Reloc,
343 intptr_t JTBase = 0) const;
347 char ARMCodeEmitter::ID = 0;
349 /// createARMJITCodeEmitterPass - Return a pass that emits the collected ARM
350 /// code to the specified MCE object.
351 FunctionPass *llvm::createARMJITCodeEmitterPass(ARMBaseTargetMachine &TM,
352 JITCodeEmitter &JCE) {
353 return new ARMCodeEmitter(TM, JCE);
356 bool ARMCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
357 assert((MF.getTarget().getRelocationModel() != Reloc::Default ||
358 MF.getTarget().getRelocationModel() != Reloc::Static) &&
359 "JIT relocation model must be set to static or default!");
360 JTI = ((ARMTargetMachine &)MF.getTarget()).getJITInfo();
361 II = ((const ARMTargetMachine &)MF.getTarget()).getInstrInfo();
362 TD = ((const ARMTargetMachine &)MF.getTarget()).getTargetData();
363 Subtarget = &TM.getSubtarget<ARMSubtarget>();
364 MCPEs = &MF.getConstantPool()->getConstants();
366 if (MF.getJumpTableInfo()) MJTEs = &MF.getJumpTableInfo()->getJumpTables();
367 IsPIC = TM.getRelocationModel() == Reloc::PIC_;
368 IsThumb = MF.getInfo<ARMFunctionInfo>()->isThumbFunction();
369 JTI->Initialize(MF, IsPIC);
370 MMI = &getAnalysis<MachineModuleInfo>();
371 MCE.setModuleInfo(MMI);
374 DEBUG(errs() << "JITTing function '"
375 << MF.getFunction()->getName() << "'\n");
376 MCE.startFunction(MF);
377 for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
379 MCE.StartMachineBasicBlock(MBB);
380 for (MachineBasicBlock::const_iterator I = MBB->begin(), E = MBB->end();
384 } while (MCE.finishFunction(MF));
389 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
391 unsigned ARMCodeEmitter::getShiftOp(unsigned Imm) const {
392 switch (ARM_AM::getAM2ShiftOpc(Imm)) {
393 default: llvm_unreachable("Unknown shift opc!");
394 case ARM_AM::asr: return 2;
395 case ARM_AM::lsl: return 0;
396 case ARM_AM::lsr: return 1;
398 case ARM_AM::rrx: return 3;
403 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
404 /// machine operand requires relocation, record the relocation and return zero.
405 unsigned ARMCodeEmitter::getMovi32Value(const MachineInstr &MI,
406 const MachineOperand &MO,
408 assert(((Reloc == ARM::reloc_arm_movt) || (Reloc == ARM::reloc_arm_movw))
409 && "Relocation to this function should be for movt or movw");
412 return static_cast<unsigned>(MO.getImm());
413 else if (MO.isGlobal())
414 emitGlobalAddress(MO.getGlobal(), Reloc, true, false);
415 else if (MO.isSymbol())
416 emitExternalSymbolAddress(MO.getSymbolName(), Reloc);
418 emitMachineBasicBlock(MO.getMBB(), Reloc);
423 llvm_unreachable("Unsupported operand type for movw/movt");
428 /// getMachineOpValue - Return binary encoding of operand. If the machine
429 /// operand requires relocation, record the relocation and return zero.
430 unsigned ARMCodeEmitter::getMachineOpValue(const MachineInstr &MI,
431 const MachineOperand &MO) const {
433 return getARMRegisterNumbering(MO.getReg());
435 return static_cast<unsigned>(MO.getImm());
436 else if (MO.isGlobal())
437 emitGlobalAddress(MO.getGlobal(), ARM::reloc_arm_branch, true, false);
438 else if (MO.isSymbol())
439 emitExternalSymbolAddress(MO.getSymbolName(), ARM::reloc_arm_branch);
440 else if (MO.isCPI()) {
441 const TargetInstrDesc &TID = MI.getDesc();
442 // For VFP load, the immediate offset is multiplied by 4.
443 unsigned Reloc = ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPLdStFrm)
444 ? ARM::reloc_arm_vfp_cp_entry : ARM::reloc_arm_cp_entry;
445 emitConstPoolAddress(MO.getIndex(), Reloc);
446 } else if (MO.isJTI())
447 emitJumpTableAddress(MO.getIndex(), ARM::reloc_arm_relative);
449 emitMachineBasicBlock(MO.getMBB(), ARM::reloc_arm_branch);
451 llvm_unreachable("Unable to encode MachineOperand!");
455 /// emitGlobalAddress - Emit the specified address to the code stream.
457 void ARMCodeEmitter::emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
458 bool MayNeedFarStub, bool Indirect,
459 intptr_t ACPV) const {
460 MachineRelocation MR = Indirect
461 ? MachineRelocation::getIndirectSymbol(MCE.getCurrentPCOffset(), Reloc,
462 const_cast<GlobalValue *>(GV),
463 ACPV, MayNeedFarStub)
464 : MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc,
465 const_cast<GlobalValue *>(GV), ACPV,
467 MCE.addRelocation(MR);
470 /// emitExternalSymbolAddress - Arrange for the address of an external symbol to
471 /// be emitted to the current location in the function, and allow it to be PC
473 void ARMCodeEmitter::
474 emitExternalSymbolAddress(const char *ES, unsigned Reloc) const {
475 MCE.addRelocation(MachineRelocation::getExtSym(MCE.getCurrentPCOffset(),
479 /// emitConstPoolAddress - Arrange for the address of an constant pool
480 /// to be emitted to the current location in the function, and allow it to be PC
482 void ARMCodeEmitter::emitConstPoolAddress(unsigned CPI, unsigned Reloc) const {
483 // Tell JIT emitter we'll resolve the address.
484 MCE.addRelocation(MachineRelocation::getConstPool(MCE.getCurrentPCOffset(),
485 Reloc, CPI, 0, true));
488 /// emitJumpTableAddress - Arrange for the address of a jump table to
489 /// be emitted to the current location in the function, and allow it to be PC
491 void ARMCodeEmitter::
492 emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const {
493 MCE.addRelocation(MachineRelocation::getJumpTable(MCE.getCurrentPCOffset(),
494 Reloc, JTIndex, 0, true));
497 /// emitMachineBasicBlock - Emit the specified address basic block.
498 void ARMCodeEmitter::emitMachineBasicBlock(MachineBasicBlock *BB,
500 intptr_t JTBase) const {
501 MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(),
505 void ARMCodeEmitter::emitWordLE(unsigned Binary) {
506 DEBUG(errs() << " 0x";
507 errs().write_hex(Binary) << "\n");
508 MCE.emitWordLE(Binary);
511 void ARMCodeEmitter::emitDWordLE(uint64_t Binary) {
512 DEBUG(errs() << " 0x";
513 errs().write_hex(Binary) << "\n");
514 MCE.emitDWordLE(Binary);
517 void ARMCodeEmitter::emitInstruction(const MachineInstr &MI) {
518 DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << MI);
520 MCE.processDebugLoc(MI.getDebugLoc(), true);
522 ++NumEmitted; // Keep track of the # of mi's emitted
523 switch (MI.getDesc().TSFlags & ARMII::FormMask) {
525 llvm_unreachable("Unhandled instruction encoding format!");
529 if (MI.getOpcode() == ARM::LEApcrelJT) {
530 // Materialize jumptable address.
531 emitLEApcrelJTInstruction(MI);
534 llvm_unreachable("Unhandled instruction encoding!");
537 emitPseudoInstruction(MI);
540 case ARMII::DPSoRegFrm:
541 emitDataProcessingInstruction(MI);
545 emitLoadStoreInstruction(MI);
547 case ARMII::LdMiscFrm:
548 case ARMII::StMiscFrm:
549 emitMiscLoadStoreInstruction(MI);
551 case ARMII::LdStMulFrm:
552 emitLoadStoreMultipleInstruction(MI);
555 emitMulFrmInstruction(MI);
558 emitExtendInstruction(MI);
560 case ARMII::ArithMiscFrm:
561 emitMiscArithInstruction(MI);
564 emitSaturateInstruction(MI);
567 emitBranchInstruction(MI);
569 case ARMII::BrMiscFrm:
570 emitMiscBranchInstruction(MI);
573 case ARMII::VFPUnaryFrm:
574 case ARMII::VFPBinaryFrm:
575 emitVFPArithInstruction(MI);
577 case ARMII::VFPConv1Frm:
578 case ARMII::VFPConv2Frm:
579 case ARMII::VFPConv3Frm:
580 case ARMII::VFPConv4Frm:
581 case ARMII::VFPConv5Frm:
582 emitVFPConversionInstruction(MI);
584 case ARMII::VFPLdStFrm:
585 emitVFPLoadStoreInstruction(MI);
587 case ARMII::VFPLdStMulFrm:
588 emitVFPLoadStoreMultipleInstruction(MI);
591 // NEON instructions.
592 case ARMII::NGetLnFrm:
593 case ARMII::NSetLnFrm:
594 emitNEONLaneInstruction(MI);
597 emitNEONDupInstruction(MI);
599 case ARMII::N1RegModImmFrm:
600 emitNEON1RegModImmInstruction(MI);
602 case ARMII::N2RegFrm:
603 emitNEON2RegInstruction(MI);
605 case ARMII::N3RegFrm:
606 emitNEON3RegInstruction(MI);
609 MCE.processDebugLoc(MI.getDebugLoc(), false);
612 void ARMCodeEmitter::emitConstPoolInstruction(const MachineInstr &MI) {
613 unsigned CPI = MI.getOperand(0).getImm(); // CP instruction index.
614 unsigned CPIndex = MI.getOperand(1).getIndex(); // Actual cp entry index.
615 const MachineConstantPoolEntry &MCPE = (*MCPEs)[CPIndex];
617 // Remember the CONSTPOOL_ENTRY address for later relocation.
618 JTI->addConstantPoolEntryAddr(CPI, MCE.getCurrentPCValue());
620 // Emit constpool island entry. In most cases, the actual values will be
621 // resolved and relocated after code emission.
622 if (MCPE.isMachineConstantPoolEntry()) {
623 ARMConstantPoolValue *ACPV =
624 static_cast<ARMConstantPoolValue*>(MCPE.Val.MachineCPVal);
626 DEBUG(errs() << " ** ARM constant pool #" << CPI << " @ "
627 << (void*)MCE.getCurrentPCValue() << " " << *ACPV << '\n');
629 assert(ACPV->isGlobalValue() && "unsupported constant pool value");
630 const GlobalValue *GV = ACPV->getGV();
632 Reloc::Model RelocM = TM.getRelocationModel();
633 emitGlobalAddress(GV, ARM::reloc_arm_machine_cp_entry,
635 Subtarget->GVIsIndirectSymbol(GV, RelocM),
638 emitExternalSymbolAddress(ACPV->getSymbol(), ARM::reloc_arm_absolute);
642 const Constant *CV = MCPE.Val.ConstVal;
645 errs() << " ** Constant pool #" << CPI << " @ "
646 << (void*)MCE.getCurrentPCValue() << " ";
647 if (const Function *F = dyn_cast<Function>(CV))
648 errs() << F->getName();
654 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
655 emitGlobalAddress(GV, ARM::reloc_arm_absolute, isa<Function>(GV), false);
657 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
658 uint32_t Val = uint32_t(*CI->getValue().getRawData());
660 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
661 if (CFP->getType()->isFloatTy())
662 emitWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
663 else if (CFP->getType()->isDoubleTy())
664 emitDWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
666 llvm_unreachable("Unable to handle this constantpool entry!");
669 llvm_unreachable("Unable to handle this constantpool entry!");
674 void ARMCodeEmitter::emitMOVi32immInstruction(const MachineInstr &MI) {
675 const MachineOperand &MO0 = MI.getOperand(0);
676 const MachineOperand &MO1 = MI.getOperand(1);
678 // Emit the 'movw' instruction.
679 unsigned Binary = 0x30 << 20; // mov: Insts{27-20} = 0b00110000
681 unsigned Lo16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movw) & 0xFFFF;
683 // Set the conditional execution predicate.
684 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
687 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
689 // Encode imm16 as imm4:imm12
690 Binary |= Lo16 & 0xFFF; // Insts{11-0} = imm12
691 Binary |= ((Lo16 >> 12) & 0xF) << 16; // Insts{19-16} = imm4
694 unsigned Hi16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movt) >> 16;
695 // Emit the 'movt' instruction.
696 Binary = 0x34 << 20; // movt: Insts{27-20} = 0b00110100
698 // Set the conditional execution predicate.
699 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
702 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
704 // Encode imm16 as imm4:imm1, same as movw above.
705 Binary |= Hi16 & 0xFFF;
706 Binary |= ((Hi16 >> 12) & 0xF) << 16;
710 void ARMCodeEmitter::emitMOVi2piecesInstruction(const MachineInstr &MI) {
711 const MachineOperand &MO0 = MI.getOperand(0);
712 const MachineOperand &MO1 = MI.getOperand(1);
713 assert(MO1.isImm() && ARM_AM::isSOImmTwoPartVal(MO1.getImm()) &&
714 "Not a valid so_imm value!");
715 unsigned V1 = ARM_AM::getSOImmTwoPartFirst(MO1.getImm());
716 unsigned V2 = ARM_AM::getSOImmTwoPartSecond(MO1.getImm());
718 // Emit the 'mov' instruction.
719 unsigned Binary = 0xd << 21; // mov: Insts{24-21} = 0b1101
721 // Set the conditional execution predicate.
722 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
725 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
728 // Set bit I(25) to identify this is the immediate form of <shifter_op>
729 Binary |= 1 << ARMII::I_BitShift;
730 Binary |= getMachineSoImmOpValue(V1);
733 // Now the 'orr' instruction.
734 Binary = 0xc << 21; // orr: Insts{24-21} = 0b1100
736 // Set the conditional execution predicate.
737 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
740 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
743 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRnShift;
746 // Set bit I(25) to identify this is the immediate form of <shifter_op>
747 Binary |= 1 << ARMII::I_BitShift;
748 Binary |= getMachineSoImmOpValue(V2);
752 void ARMCodeEmitter::emitLEApcrelJTInstruction(const MachineInstr &MI) {
753 // It's basically add r, pc, (LJTI - $+8)
755 const TargetInstrDesc &TID = MI.getDesc();
757 // Emit the 'add' instruction.
758 unsigned Binary = 0x4 << 21; // add: Insts{24-21} = 0b0100
760 // Set the conditional execution predicate
761 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
763 // Encode S bit if MI modifies CPSR.
764 Binary |= getAddrModeSBit(MI, TID);
767 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
769 // Encode Rn which is PC.
770 Binary |= getARMRegisterNumbering(ARM::PC) << ARMII::RegRnShift;
772 // Encode the displacement.
773 Binary |= 1 << ARMII::I_BitShift;
774 emitJumpTableAddress(MI.getOperand(1).getIndex(), ARM::reloc_arm_jt_base);
779 void ARMCodeEmitter::emitPseudoMoveInstruction(const MachineInstr &MI) {
780 unsigned Opcode = MI.getDesc().Opcode;
782 // Part of binary is determined by TableGn.
783 unsigned Binary = getBinaryCodeForInstr(MI);
785 // Set the conditional execution predicate
786 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
788 // Encode S bit if MI modifies CPSR.
789 if (Opcode == ARM::MOVsrl_flag || Opcode == ARM::MOVsra_flag)
790 Binary |= 1 << ARMII::S_BitShift;
792 // Encode register def if there is one.
793 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
795 // Encode the shift operation.
802 case ARM::MOVsrl_flag:
804 Binary |= (0x2 << 4) | (1 << 7);
806 case ARM::MOVsra_flag:
808 Binary |= (0x4 << 4) | (1 << 7);
812 // Encode register Rm.
813 Binary |= getMachineOpValue(MI, 1);
818 void ARMCodeEmitter::addPCLabel(unsigned LabelID) {
819 DEBUG(errs() << " ** LPC" << LabelID << " @ "
820 << (void*)MCE.getCurrentPCValue() << '\n');
821 JTI->addPCLabelAddr(LabelID, MCE.getCurrentPCValue());
824 void ARMCodeEmitter::emitPseudoInstruction(const MachineInstr &MI) {
825 unsigned Opcode = MI.getDesc().Opcode;
828 llvm_unreachable("ARMCodeEmitter::emitPseudoInstruction");
830 case ARM::BMOVPCRX_CALL:
832 case ARM::BMOVPCRXr9_CALL: {
833 // First emit mov lr, pc
834 unsigned Binary = 0x01a0e00f;
835 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
838 // and then emit the branch.
839 emitMiscBranchInstruction(MI);
842 case TargetOpcode::INLINEASM: {
843 // We allow inline assembler nodes with empty bodies - they can
844 // implicitly define registers, which is ok for JIT.
845 if (MI.getOperand(0).getSymbolName()[0]) {
846 report_fatal_error("JIT does not support inline asm!");
850 case TargetOpcode::PROLOG_LABEL:
851 case TargetOpcode::EH_LABEL:
852 MCE.emitLabel(MI.getOperand(0).getMCSymbol());
854 case TargetOpcode::IMPLICIT_DEF:
855 case TargetOpcode::KILL:
858 case ARM::CONSTPOOL_ENTRY:
859 emitConstPoolInstruction(MI);
862 // Remember of the address of the PC label for relocation later.
863 addPCLabel(MI.getOperand(2).getImm());
864 // PICADD is just an add instruction that implicitly read pc.
865 emitDataProcessingInstruction(MI, 0, ARM::PC);
872 // Remember of the address of the PC label for relocation later.
873 addPCLabel(MI.getOperand(2).getImm());
874 // These are just load / store instructions that implicitly read pc.
875 emitLoadStoreInstruction(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 emitMiscLoadStoreInstruction(MI, ARM::PC);
890 // Two instructions to materialize a constant.
891 if (Subtarget->hasV6T2Ops())
892 emitMOVi32immInstruction(MI);
894 emitMOVi2piecesInstruction(MI);
897 case ARM::LEApcrelJT:
898 // Materialize jumptable address.
899 emitLEApcrelJTInstruction(MI);
902 case ARM::MOVsrl_flag:
903 case ARM::MOVsra_flag:
904 emitPseudoMoveInstruction(MI);
909 unsigned ARMCodeEmitter::getMachineSoRegOpValue(const MachineInstr &MI,
910 const TargetInstrDesc &TID,
911 const MachineOperand &MO,
913 unsigned Binary = getMachineOpValue(MI, MO);
915 const MachineOperand &MO1 = MI.getOperand(OpIdx + 1);
916 const MachineOperand &MO2 = MI.getOperand(OpIdx + 2);
917 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO2.getImm());
919 // Encode the shift opcode.
921 unsigned Rs = MO1.getReg();
923 // Set shift operand (bit[7:4]).
928 // RRX - 0110 and bit[11:8] clear.
930 default: llvm_unreachable("Unknown shift opc!");
931 case ARM_AM::lsl: SBits = 0x1; break;
932 case ARM_AM::lsr: SBits = 0x3; break;
933 case ARM_AM::asr: SBits = 0x5; break;
934 case ARM_AM::ror: SBits = 0x7; break;
935 case ARM_AM::rrx: SBits = 0x6; break;
938 // Set shift operand (bit[6:4]).
944 default: llvm_unreachable("Unknown shift opc!");
945 case ARM_AM::lsl: SBits = 0x0; break;
946 case ARM_AM::lsr: SBits = 0x2; break;
947 case ARM_AM::asr: SBits = 0x4; break;
948 case ARM_AM::ror: SBits = 0x6; break;
951 Binary |= SBits << 4;
952 if (SOpc == ARM_AM::rrx)
955 // Encode the shift operation Rs or shift_imm (except rrx).
957 // Encode Rs bit[11:8].
958 assert(ARM_AM::getSORegOffset(MO2.getImm()) == 0);
959 return Binary | (getARMRegisterNumbering(Rs) << ARMII::RegRsShift);
962 // Encode shift_imm bit[11:7].
963 return Binary | ARM_AM::getSORegOffset(MO2.getImm()) << 7;
966 unsigned ARMCodeEmitter::getMachineSoImmOpValue(unsigned SoImm) {
967 int SoImmVal = ARM_AM::getSOImmVal(SoImm);
968 assert(SoImmVal != -1 && "Not a valid so_imm value!");
970 // Encode rotate_imm.
971 unsigned Binary = (ARM_AM::getSOImmValRot((unsigned)SoImmVal) >> 1)
972 << ARMII::SoRotImmShift;
975 Binary |= ARM_AM::getSOImmValImm((unsigned)SoImmVal);
979 unsigned ARMCodeEmitter::getAddrModeSBit(const MachineInstr &MI,
980 const TargetInstrDesc &TID) const {
981 for (unsigned i = MI.getNumOperands(), e = TID.getNumOperands(); i >= e; --i){
982 const MachineOperand &MO = MI.getOperand(i-1);
983 if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR)
984 return 1 << ARMII::S_BitShift;
989 void ARMCodeEmitter::emitDataProcessingInstruction(const MachineInstr &MI,
991 unsigned ImplicitRn) {
992 const TargetInstrDesc &TID = MI.getDesc();
994 // Part of binary is determined by TableGn.
995 unsigned Binary = getBinaryCodeForInstr(MI);
997 // Set the conditional execution predicate
998 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1000 // Encode S bit if MI modifies CPSR.
1001 Binary |= getAddrModeSBit(MI, TID);
1003 // Encode register def if there is one.
1004 unsigned NumDefs = TID.getNumDefs();
1007 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1008 else if (ImplicitRd)
1009 // Special handling for implicit use (e.g. PC).
1010 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
1012 if (TID.Opcode == ARM::MOVi16) {
1013 // Get immediate from MI.
1014 unsigned Lo16 = getMovi32Value(MI, MI.getOperand(OpIdx),
1015 ARM::reloc_arm_movw);
1016 // Encode imm which is the same as in emitMOVi32immInstruction().
1017 Binary |= Lo16 & 0xFFF;
1018 Binary |= ((Lo16 >> 12) & 0xF) << 16;
1021 } else if(TID.Opcode == ARM::MOVTi16) {
1022 unsigned Hi16 = (getMovi32Value(MI, MI.getOperand(OpIdx),
1023 ARM::reloc_arm_movt) >> 16);
1024 Binary |= Hi16 & 0xFFF;
1025 Binary |= ((Hi16 >> 12) & 0xF) << 16;
1028 } else if ((TID.Opcode == ARM::BFC) || (TID.Opcode == ARM::BFI)) {
1029 uint32_t v = ~MI.getOperand(2).getImm();
1030 int32_t lsb = CountTrailingZeros_32(v);
1031 int32_t msb = (32 - CountLeadingZeros_32(v)) - 1;
1032 // Instr{20-16} = msb, Instr{11-7} = lsb
1033 Binary |= (msb & 0x1F) << 16;
1034 Binary |= (lsb & 0x1F) << 7;
1037 } else if ((TID.Opcode == ARM::UBFX) || (TID.Opcode == ARM::SBFX)) {
1038 // Encode Rn in Instr{0-3}
1039 Binary |= getMachineOpValue(MI, OpIdx++);
1041 uint32_t lsb = MI.getOperand(OpIdx++).getImm();
1042 uint32_t widthm1 = MI.getOperand(OpIdx++).getImm() - 1;
1044 // Instr{20-16} = widthm1, Instr{11-7} = lsb
1045 Binary |= (widthm1 & 0x1F) << 16;
1046 Binary |= (lsb & 0x1F) << 7;
1051 // If this is a two-address operand, skip it. e.g. MOVCCr operand 1.
1052 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1055 // Encode first non-shifter register operand if there is one.
1056 bool isUnary = TID.TSFlags & ARMII::UnaryDP;
1059 // Special handling for implicit use (e.g. PC).
1060 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1062 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRnShift;
1067 // Encode shifter operand.
1068 const MachineOperand &MO = MI.getOperand(OpIdx);
1069 if ((TID.TSFlags & ARMII::FormMask) == ARMII::DPSoRegFrm) {
1071 emitWordLE(Binary | getMachineSoRegOpValue(MI, TID, MO, OpIdx));
1076 // Encode register Rm.
1077 emitWordLE(Binary | getARMRegisterNumbering(MO.getReg()));
1082 Binary |= getMachineSoImmOpValue((unsigned)MO.getImm());
1087 void ARMCodeEmitter::emitLoadStoreInstruction(const MachineInstr &MI,
1088 unsigned ImplicitRd,
1089 unsigned ImplicitRn) {
1090 const TargetInstrDesc &TID = MI.getDesc();
1091 unsigned Form = TID.TSFlags & ARMII::FormMask;
1092 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1094 // Part of binary is determined by TableGn.
1095 unsigned Binary = getBinaryCodeForInstr(MI);
1097 // If this is an LDRi12, STRi12 or LDRcp, nothing more needs be done.
1098 if (MI.getOpcode() == ARM::LDRi12 || MI.getOpcode() == ARM::LDRcp ||
1099 MI.getOpcode() == ARM::STRi12) {
1104 // Set the conditional execution predicate
1105 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1109 // Operand 0 of a pre- and post-indexed store is the address base
1110 // writeback. Skip it.
1111 bool Skipped = false;
1112 if (IsPrePost && Form == ARMII::StFrm) {
1117 // Set first operand
1119 // Special handling for implicit use (e.g. PC).
1120 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
1122 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1124 // Set second operand
1126 // Special handling for implicit use (e.g. PC).
1127 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1129 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1131 // If this is a two-address operand, skip it. e.g. LDR_PRE.
1132 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1135 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1136 unsigned AM2Opc = (ImplicitRn == ARM::PC)
1137 ? 0 : MI.getOperand(OpIdx+1).getImm();
1139 // Set bit U(23) according to sign of immed value (positive or negative).
1140 Binary |= ((ARM_AM::getAM2Op(AM2Opc) == ARM_AM::add ? 1 : 0) <<
1142 if (!MO2.getReg()) { // is immediate
1143 if (ARM_AM::getAM2Offset(AM2Opc))
1144 // Set the value of offset_12 field
1145 Binary |= ARM_AM::getAM2Offset(AM2Opc);
1150 // Set bit I(25), because this is not in immediate encoding.
1151 Binary |= 1 << ARMII::I_BitShift;
1152 assert(TargetRegisterInfo::isPhysicalRegister(MO2.getReg()));
1153 // Set bit[3:0] to the corresponding Rm register
1154 Binary |= getARMRegisterNumbering(MO2.getReg());
1156 // If this instr is in scaled register offset/index instruction, set
1157 // shift_immed(bit[11:7]) and shift(bit[6:5]) fields.
1158 if (unsigned ShImm = ARM_AM::getAM2Offset(AM2Opc)) {
1159 Binary |= getShiftOp(AM2Opc) << ARMII::ShiftImmShift; // shift
1160 Binary |= ShImm << ARMII::ShiftShift; // shift_immed
1166 void ARMCodeEmitter::emitMiscLoadStoreInstruction(const MachineInstr &MI,
1167 unsigned ImplicitRn) {
1168 const TargetInstrDesc &TID = MI.getDesc();
1169 unsigned Form = TID.TSFlags & ARMII::FormMask;
1170 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1172 // Part of binary is determined by TableGn.
1173 unsigned Binary = getBinaryCodeForInstr(MI);
1175 // Set the conditional execution predicate
1176 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1180 // Operand 0 of a pre- and post-indexed store is the address base
1181 // writeback. Skip it.
1182 bool Skipped = false;
1183 if (IsPrePost && Form == ARMII::StMiscFrm) {
1188 // Set first operand
1189 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1191 // Skip LDRD and STRD's second operand.
1192 if (TID.Opcode == ARM::LDRD || TID.Opcode == ARM::STRD)
1195 // Set second operand
1197 // Special handling for implicit use (e.g. PC).
1198 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1200 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1202 // If this is a two-address operand, skip it. e.g. LDRH_POST.
1203 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1206 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1207 unsigned AM3Opc = (ImplicitRn == ARM::PC)
1208 ? 0 : MI.getOperand(OpIdx+1).getImm();
1210 // Set bit U(23) according to sign of immed value (positive or negative)
1211 Binary |= ((ARM_AM::getAM3Op(AM3Opc) == ARM_AM::add ? 1 : 0) <<
1214 // If this instr is in register offset/index encoding, set bit[3:0]
1215 // to the corresponding Rm register.
1217 Binary |= getARMRegisterNumbering(MO2.getReg());
1222 // This instr is in immediate offset/index encoding, set bit 22 to 1.
1223 Binary |= 1 << ARMII::AM3_I_BitShift;
1224 if (unsigned ImmOffs = ARM_AM::getAM3Offset(AM3Opc)) {
1226 Binary |= (ImmOffs >> 4) << ARMII::ImmHiShift; // immedH
1227 Binary |= (ImmOffs & 0xF); // immedL
1233 static unsigned getAddrModeUPBits(unsigned Mode) {
1234 unsigned Binary = 0;
1236 // Set addressing mode by modifying bits U(23) and P(24)
1237 // IA - Increment after - bit U = 1 and bit P = 0
1238 // IB - Increment before - bit U = 1 and bit P = 1
1239 // DA - Decrement after - bit U = 0 and bit P = 0
1240 // DB - Decrement before - bit U = 0 and bit P = 1
1242 default: llvm_unreachable("Unknown addressing sub-mode!");
1243 case ARM_AM::da: break;
1244 case ARM_AM::db: Binary |= 0x1 << ARMII::P_BitShift; break;
1245 case ARM_AM::ia: Binary |= 0x1 << ARMII::U_BitShift; break;
1246 case ARM_AM::ib: Binary |= 0x3 << ARMII::U_BitShift; break;
1252 void ARMCodeEmitter::emitLoadStoreMultipleInstruction(const MachineInstr &MI) {
1253 const TargetInstrDesc &TID = MI.getDesc();
1254 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1256 // Part of binary is determined by TableGn.
1257 unsigned Binary = getBinaryCodeForInstr(MI);
1259 // Set the conditional execution predicate
1260 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1262 // Skip operand 0 of an instruction with base register update.
1267 // Set base address operand
1268 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1270 // Set addressing mode by modifying bits U(23) and P(24)
1271 ARM_AM::AMSubMode Mode = ARM_AM::getLoadStoreMultipleSubMode(MI.getOpcode());
1272 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(Mode));
1276 Binary |= 0x1 << ARMII::W_BitShift;
1279 for (unsigned i = OpIdx+2, e = MI.getNumOperands(); i != e; ++i) {
1280 const MachineOperand &MO = MI.getOperand(i);
1281 if (!MO.isReg() || MO.isImplicit())
1283 unsigned RegNum = getARMRegisterNumbering(MO.getReg());
1284 assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
1286 Binary |= 0x1 << RegNum;
1292 void ARMCodeEmitter::emitMulFrmInstruction(const MachineInstr &MI) {
1293 const TargetInstrDesc &TID = MI.getDesc();
1295 // Part of binary is determined by TableGn.
1296 unsigned Binary = getBinaryCodeForInstr(MI);
1298 // Set the conditional execution predicate
1299 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1301 // Encode S bit if MI modifies CPSR.
1302 Binary |= getAddrModeSBit(MI, TID);
1304 // 32x32->64bit operations have two destination registers. The number
1305 // of register definitions will tell us if that's what we're dealing with.
1307 if (TID.getNumDefs() == 2)
1308 Binary |= getMachineOpValue (MI, OpIdx++) << ARMII::RegRdLoShift;
1311 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdHiShift;
1314 Binary |= getMachineOpValue(MI, OpIdx++);
1317 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRsShift;
1319 // Many multiple instructions (e.g. MLA) have three src operands. Encode
1320 // it as Rn (for multiply, that's in the same offset as RdLo.
1321 if (TID.getNumOperands() > OpIdx &&
1322 !TID.OpInfo[OpIdx].isPredicate() &&
1323 !TID.OpInfo[OpIdx].isOptionalDef())
1324 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRdLoShift;
1329 void ARMCodeEmitter::emitExtendInstruction(const MachineInstr &MI) {
1330 const TargetInstrDesc &TID = MI.getDesc();
1332 // Part of binary is determined by TableGn.
1333 unsigned Binary = getBinaryCodeForInstr(MI);
1335 // Set the conditional execution predicate
1336 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1341 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1343 const MachineOperand &MO1 = MI.getOperand(OpIdx++);
1344 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1346 // Two register operand form.
1348 Binary |= getMachineOpValue(MI, MO1) << ARMII::RegRnShift;
1351 Binary |= getMachineOpValue(MI, MO2);
1354 Binary |= getMachineOpValue(MI, MO1);
1357 // Encode rot imm (0, 8, 16, or 24) if it has a rotate immediate operand.
1358 if (MI.getOperand(OpIdx).isImm() &&
1359 !TID.OpInfo[OpIdx].isPredicate() &&
1360 !TID.OpInfo[OpIdx].isOptionalDef())
1361 Binary |= (getMachineOpValue(MI, OpIdx) / 8) << ARMII::ExtRotImmShift;
1366 void ARMCodeEmitter::emitMiscArithInstruction(const MachineInstr &MI) {
1367 const TargetInstrDesc &TID = MI.getDesc();
1369 // Part of binary is determined by TableGn.
1370 unsigned Binary = getBinaryCodeForInstr(MI);
1372 // Set the conditional execution predicate
1373 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1375 // PKH instructions are finished at this point
1376 if (TID.Opcode == ARM::PKHBT || TID.Opcode == ARM::PKHTB) {
1384 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1386 const MachineOperand &MO = MI.getOperand(OpIdx++);
1387 if (OpIdx == TID.getNumOperands() ||
1388 TID.OpInfo[OpIdx].isPredicate() ||
1389 TID.OpInfo[OpIdx].isOptionalDef()) {
1390 // Encode Rm and it's done.
1391 Binary |= getMachineOpValue(MI, MO);
1397 Binary |= getMachineOpValue(MI, MO) << ARMII::RegRnShift;
1400 Binary |= getMachineOpValue(MI, OpIdx++);
1402 // Encode shift_imm.
1403 unsigned ShiftAmt = MI.getOperand(OpIdx).getImm();
1404 if (TID.Opcode == ARM::PKHTB) {
1405 assert(ShiftAmt != 0 && "PKHTB shift_imm is 0!");
1409 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1410 Binary |= ShiftAmt << ARMII::ShiftShift;
1415 void ARMCodeEmitter::emitSaturateInstruction(const MachineInstr &MI) {
1416 const TargetInstrDesc &TID = MI.getDesc();
1418 // Part of binary is determined by TableGen.
1419 unsigned Binary = getBinaryCodeForInstr(MI);
1421 // Set the conditional execution predicate
1422 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1425 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
1427 // Encode saturate bit position.
1428 unsigned Pos = MI.getOperand(1).getImm();
1429 if (TID.Opcode == ARM::SSAT || TID.Opcode == ARM::SSAT16)
1431 assert((Pos < 16 || (Pos < 32 &&
1432 TID.Opcode != ARM::SSAT16 &&
1433 TID.Opcode != ARM::USAT16)) &&
1434 "saturate bit position out of range");
1435 Binary |= Pos << 16;
1438 Binary |= getMachineOpValue(MI, 2);
1440 // Encode shift_imm.
1441 if (TID.getNumOperands() == 4) {
1442 unsigned ShiftOp = MI.getOperand(3).getImm();
1443 ARM_AM::ShiftOpc Opc = ARM_AM::getSORegShOp(ShiftOp);
1444 if (Opc == ARM_AM::asr)
1446 unsigned ShiftAmt = MI.getOperand(3).getImm();
1447 if (ShiftAmt == 32 && Opc == ARM_AM::asr)
1449 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1450 Binary |= ShiftAmt << ARMII::ShiftShift;
1456 void ARMCodeEmitter::emitBranchInstruction(const MachineInstr &MI) {
1457 const TargetInstrDesc &TID = MI.getDesc();
1459 if (TID.Opcode == ARM::TPsoft) {
1460 llvm_unreachable("ARM::TPsoft FIXME"); // FIXME
1463 // Part of binary is determined by TableGn.
1464 unsigned Binary = getBinaryCodeForInstr(MI);
1466 // Set the conditional execution predicate
1467 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1469 // Set signed_immed_24 field
1470 Binary |= getMachineOpValue(MI, 0);
1475 void ARMCodeEmitter::emitInlineJumpTable(unsigned JTIndex) {
1476 // Remember the base address of the inline jump table.
1477 uintptr_t JTBase = MCE.getCurrentPCValue();
1478 JTI->addJumpTableBaseAddr(JTIndex, JTBase);
1479 DEBUG(errs() << " ** Jump Table #" << JTIndex << " @ " << (void*)JTBase
1482 // Now emit the jump table entries.
1483 const std::vector<MachineBasicBlock*> &MBBs = (*MJTEs)[JTIndex].MBBs;
1484 for (unsigned i = 0, e = MBBs.size(); i != e; ++i) {
1486 // DestBB address - JT base.
1487 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_pic_jt, JTBase);
1489 // Absolute DestBB address.
1490 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_absolute);
1495 void ARMCodeEmitter::emitMiscBranchInstruction(const MachineInstr &MI) {
1496 const TargetInstrDesc &TID = MI.getDesc();
1498 // Handle jump tables.
1499 if (TID.Opcode == ARM::BR_JTr || TID.Opcode == ARM::BR_JTadd) {
1500 // First emit a ldr pc, [] instruction.
1501 emitDataProcessingInstruction(MI, ARM::PC);
1503 // Then emit the inline jump table.
1505 (TID.Opcode == ARM::BR_JTr)
1506 ? MI.getOperand(1).getIndex() : MI.getOperand(2).getIndex();
1507 emitInlineJumpTable(JTIndex);
1509 } else if (TID.Opcode == ARM::BR_JTm) {
1510 // First emit a ldr pc, [] instruction.
1511 emitLoadStoreInstruction(MI, ARM::PC);
1513 // Then emit the inline jump table.
1514 emitInlineJumpTable(MI.getOperand(3).getIndex());
1518 // Part of binary is determined by TableGn.
1519 unsigned Binary = getBinaryCodeForInstr(MI);
1521 // Set the conditional execution predicate
1522 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1524 if (TID.Opcode == ARM::BX_RET || TID.Opcode == ARM::MOVPCLR)
1525 // The return register is LR.
1526 Binary |= getARMRegisterNumbering(ARM::LR);
1528 // otherwise, set the return register
1529 Binary |= getMachineOpValue(MI, 0);
1534 static unsigned encodeVFPRd(const MachineInstr &MI, unsigned OpIdx) {
1535 unsigned RegD = MI.getOperand(OpIdx).getReg();
1536 unsigned Binary = 0;
1537 bool isSPVFP = ARM::SPRRegisterClass->contains(RegD);
1538 RegD = getARMRegisterNumbering(RegD);
1540 Binary |= RegD << ARMII::RegRdShift;
1542 Binary |= ((RegD & 0x1E) >> 1) << ARMII::RegRdShift;
1543 Binary |= (RegD & 0x01) << ARMII::D_BitShift;
1548 static unsigned encodeVFPRn(const MachineInstr &MI, unsigned OpIdx) {
1549 unsigned RegN = MI.getOperand(OpIdx).getReg();
1550 unsigned Binary = 0;
1551 bool isSPVFP = ARM::SPRRegisterClass->contains(RegN);
1552 RegN = getARMRegisterNumbering(RegN);
1554 Binary |= RegN << ARMII::RegRnShift;
1556 Binary |= ((RegN & 0x1E) >> 1) << ARMII::RegRnShift;
1557 Binary |= (RegN & 0x01) << ARMII::N_BitShift;
1562 static unsigned encodeVFPRm(const MachineInstr &MI, unsigned OpIdx) {
1563 unsigned RegM = MI.getOperand(OpIdx).getReg();
1564 unsigned Binary = 0;
1565 bool isSPVFP = ARM::SPRRegisterClass->contains(RegM);
1566 RegM = getARMRegisterNumbering(RegM);
1570 Binary |= ((RegM & 0x1E) >> 1);
1571 Binary |= (RegM & 0x01) << ARMII::M_BitShift;
1576 void ARMCodeEmitter::emitVFPArithInstruction(const MachineInstr &MI) {
1577 const TargetInstrDesc &TID = MI.getDesc();
1579 // Part of binary is determined by TableGn.
1580 unsigned Binary = getBinaryCodeForInstr(MI);
1582 // Set the conditional execution predicate
1583 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1586 assert((Binary & ARMII::D_BitShift) == 0 &&
1587 (Binary & ARMII::N_BitShift) == 0 &&
1588 (Binary & ARMII::M_BitShift) == 0 && "VFP encoding bug!");
1591 Binary |= encodeVFPRd(MI, OpIdx++);
1593 // If this is a two-address operand, skip it, e.g. FMACD.
1594 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1598 if ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPBinaryFrm)
1599 Binary |= encodeVFPRn(MI, OpIdx++);
1601 if (OpIdx == TID.getNumOperands() ||
1602 TID.OpInfo[OpIdx].isPredicate() ||
1603 TID.OpInfo[OpIdx].isOptionalDef()) {
1604 // FCMPEZD etc. has only one operand.
1610 Binary |= encodeVFPRm(MI, OpIdx);
1615 void ARMCodeEmitter::emitVFPConversionInstruction(const MachineInstr &MI) {
1616 const TargetInstrDesc &TID = MI.getDesc();
1617 unsigned Form = TID.TSFlags & ARMII::FormMask;
1619 // Part of binary is determined by TableGn.
1620 unsigned Binary = getBinaryCodeForInstr(MI);
1622 // Set the conditional execution predicate
1623 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1627 case ARMII::VFPConv1Frm:
1628 case ARMII::VFPConv2Frm:
1629 case ARMII::VFPConv3Frm:
1631 Binary |= encodeVFPRd(MI, 0);
1633 case ARMII::VFPConv4Frm:
1635 Binary |= encodeVFPRn(MI, 0);
1637 case ARMII::VFPConv5Frm:
1639 Binary |= encodeVFPRm(MI, 0);
1645 case ARMII::VFPConv1Frm:
1647 Binary |= encodeVFPRm(MI, 1);
1649 case ARMII::VFPConv2Frm:
1650 case ARMII::VFPConv3Frm:
1652 Binary |= encodeVFPRn(MI, 1);
1654 case ARMII::VFPConv4Frm:
1655 case ARMII::VFPConv5Frm:
1657 Binary |= encodeVFPRd(MI, 1);
1661 if (Form == ARMII::VFPConv5Frm)
1663 Binary |= encodeVFPRn(MI, 2);
1664 else if (Form == ARMII::VFPConv3Frm)
1666 Binary |= encodeVFPRm(MI, 2);
1671 void ARMCodeEmitter::emitVFPLoadStoreInstruction(const MachineInstr &MI) {
1672 // Part of binary is determined by TableGn.
1673 unsigned Binary = getBinaryCodeForInstr(MI);
1675 // Set the conditional execution predicate
1676 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1681 Binary |= encodeVFPRd(MI, OpIdx++);
1683 // Encode address base.
1684 const MachineOperand &Base = MI.getOperand(OpIdx++);
1685 Binary |= getMachineOpValue(MI, Base) << ARMII::RegRnShift;
1687 // If there is a non-zero immediate offset, encode it.
1689 const MachineOperand &Offset = MI.getOperand(OpIdx);
1690 if (unsigned ImmOffs = ARM_AM::getAM5Offset(Offset.getImm())) {
1691 if (ARM_AM::getAM5Op(Offset.getImm()) == ARM_AM::add)
1692 Binary |= 1 << ARMII::U_BitShift;
1699 // If immediate offset is omitted, default to +0.
1700 Binary |= 1 << ARMII::U_BitShift;
1706 ARMCodeEmitter::emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI) {
1707 const TargetInstrDesc &TID = MI.getDesc();
1708 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1710 // Part of binary is determined by TableGn.
1711 unsigned Binary = getBinaryCodeForInstr(MI);
1713 // Set the conditional execution predicate
1714 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1716 // Skip operand 0 of an instruction with base register update.
1721 // Set base address operand
1722 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1724 // Set addressing mode by modifying bits U(23) and P(24)
1725 ARM_AM::AMSubMode Mode = ARM_AM::getLoadStoreMultipleSubMode(MI.getOpcode());
1726 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(Mode));
1730 Binary |= 0x1 << ARMII::W_BitShift;
1732 // First register is encoded in Dd.
1733 Binary |= encodeVFPRd(MI, OpIdx+2);
1735 // Count the number of registers.
1736 unsigned NumRegs = 1;
1737 for (unsigned i = OpIdx+3, e = MI.getNumOperands(); i != e; ++i) {
1738 const MachineOperand &MO = MI.getOperand(i);
1739 if (!MO.isReg() || MO.isImplicit())
1743 // Bit 8 will be set if <list> is consecutive 64-bit registers (e.g., D0)
1744 // Otherwise, it will be 0, in the case of 32-bit registers.
1746 Binary |= NumRegs * 2;
1753 static unsigned encodeNEONRd(const MachineInstr &MI, unsigned OpIdx) {
1754 unsigned RegD = MI.getOperand(OpIdx).getReg();
1755 unsigned Binary = 0;
1756 RegD = getARMRegisterNumbering(RegD);
1757 Binary |= (RegD & 0xf) << ARMII::RegRdShift;
1758 Binary |= ((RegD >> 4) & 1) << ARMII::D_BitShift;
1762 static unsigned encodeNEONRn(const MachineInstr &MI, unsigned OpIdx) {
1763 unsigned RegN = MI.getOperand(OpIdx).getReg();
1764 unsigned Binary = 0;
1765 RegN = getARMRegisterNumbering(RegN);
1766 Binary |= (RegN & 0xf) << ARMII::RegRnShift;
1767 Binary |= ((RegN >> 4) & 1) << ARMII::N_BitShift;
1771 static unsigned encodeNEONRm(const MachineInstr &MI, unsigned OpIdx) {
1772 unsigned RegM = MI.getOperand(OpIdx).getReg();
1773 unsigned Binary = 0;
1774 RegM = getARMRegisterNumbering(RegM);
1775 Binary |= (RegM & 0xf);
1776 Binary |= ((RegM >> 4) & 1) << ARMII::M_BitShift;
1780 /// convertNEONDataProcToThumb - Convert the ARM mode encoding for a NEON
1781 /// data-processing instruction to the corresponding Thumb encoding.
1782 static unsigned convertNEONDataProcToThumb(unsigned Binary) {
1783 assert((Binary & 0xfe000000) == 0xf2000000 &&
1784 "not an ARM NEON data-processing instruction");
1785 unsigned UBit = (Binary >> 24) & 1;
1786 return 0xef000000 | (UBit << 28) | (Binary & 0xffffff);
1789 void ARMCodeEmitter::emitNEONLaneInstruction(const MachineInstr &MI) {
1790 unsigned Binary = getBinaryCodeForInstr(MI);
1792 unsigned RegTOpIdx, RegNOpIdx, LnOpIdx;
1793 const TargetInstrDesc &TID = MI.getDesc();
1794 if ((TID.TSFlags & ARMII::FormMask) == ARMII::NGetLnFrm) {
1798 } else { // ARMII::NSetLnFrm
1804 // Set the conditional execution predicate
1805 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1807 unsigned RegT = MI.getOperand(RegTOpIdx).getReg();
1808 RegT = getARMRegisterNumbering(RegT);
1809 Binary |= (RegT << ARMII::RegRdShift);
1810 Binary |= encodeNEONRn(MI, RegNOpIdx);
1813 if ((Binary & (1 << 22)) != 0)
1814 LaneShift = 0; // 8-bit elements
1815 else if ((Binary & (1 << 5)) != 0)
1816 LaneShift = 1; // 16-bit elements
1818 LaneShift = 2; // 32-bit elements
1820 unsigned Lane = MI.getOperand(LnOpIdx).getImm() << LaneShift;
1821 unsigned Opc1 = Lane >> 2;
1822 unsigned Opc2 = Lane & 3;
1823 assert((Opc1 & 3) == 0 && "out-of-range lane number operand");
1824 Binary |= (Opc1 << 21);
1825 Binary |= (Opc2 << 5);
1830 void ARMCodeEmitter::emitNEONDupInstruction(const MachineInstr &MI) {
1831 unsigned Binary = getBinaryCodeForInstr(MI);
1833 // Set the conditional execution predicate
1834 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1836 unsigned RegT = MI.getOperand(1).getReg();
1837 RegT = getARMRegisterNumbering(RegT);
1838 Binary |= (RegT << ARMII::RegRdShift);
1839 Binary |= encodeNEONRn(MI, 0);
1843 void ARMCodeEmitter::emitNEON1RegModImmInstruction(const MachineInstr &MI) {
1844 unsigned Binary = getBinaryCodeForInstr(MI);
1845 // Destination register is encoded in Dd.
1846 Binary |= encodeNEONRd(MI, 0);
1847 // Immediate fields: Op, Cmode, I, Imm3, Imm4
1848 unsigned Imm = MI.getOperand(1).getImm();
1849 unsigned Op = (Imm >> 12) & 1;
1850 unsigned Cmode = (Imm >> 8) & 0xf;
1851 unsigned I = (Imm >> 7) & 1;
1852 unsigned Imm3 = (Imm >> 4) & 0x7;
1853 unsigned Imm4 = Imm & 0xf;
1854 Binary |= (I << 24) | (Imm3 << 16) | (Cmode << 8) | (Op << 5) | Imm4;
1856 Binary = convertNEONDataProcToThumb(Binary);
1860 void ARMCodeEmitter::emitNEON2RegInstruction(const MachineInstr &MI) {
1861 const TargetInstrDesc &TID = MI.getDesc();
1862 unsigned Binary = getBinaryCodeForInstr(MI);
1863 // Destination register is encoded in Dd; source register in Dm.
1865 Binary |= encodeNEONRd(MI, OpIdx++);
1866 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1868 Binary |= encodeNEONRm(MI, OpIdx);
1870 Binary = convertNEONDataProcToThumb(Binary);
1871 // FIXME: This does not handle VDUPfdf or VDUPfqf.
1875 void ARMCodeEmitter::emitNEON3RegInstruction(const MachineInstr &MI) {
1876 const TargetInstrDesc &TID = MI.getDesc();
1877 unsigned Binary = getBinaryCodeForInstr(MI);
1878 // Destination register is encoded in Dd; source registers in Dn and Dm.
1880 Binary |= encodeNEONRd(MI, OpIdx++);
1881 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1883 Binary |= encodeNEONRn(MI, OpIdx++);
1884 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1886 Binary |= encodeNEONRm(MI, OpIdx);
1888 Binary = convertNEONDataProcToThumb(Binary);
1889 // FIXME: This does not handle VMOVDneon or VMOVQ.
1893 #include "ARMGenCodeEmitter.inc"