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);
105 unsigned getAddrModeSBit(const MachineInstr &MI,
106 const TargetInstrDesc &TID) const;
108 void emitDataProcessingInstruction(const MachineInstr &MI,
109 unsigned ImplicitRd = 0,
110 unsigned ImplicitRn = 0);
112 void emitLoadStoreInstruction(const MachineInstr &MI,
113 unsigned ImplicitRd = 0,
114 unsigned ImplicitRn = 0);
116 void emitMiscLoadStoreInstruction(const MachineInstr &MI,
117 unsigned ImplicitRn = 0);
119 void emitLoadStoreMultipleInstruction(const MachineInstr &MI);
121 void emitMulFrmInstruction(const MachineInstr &MI);
123 void emitExtendInstruction(const MachineInstr &MI);
125 void emitMiscArithInstruction(const MachineInstr &MI);
127 void emitSaturateInstruction(const MachineInstr &MI);
129 void emitBranchInstruction(const MachineInstr &MI);
131 void emitInlineJumpTable(unsigned JTIndex);
133 void emitMiscBranchInstruction(const MachineInstr &MI);
135 void emitVFPArithInstruction(const MachineInstr &MI);
137 void emitVFPConversionInstruction(const MachineInstr &MI);
139 void emitVFPLoadStoreInstruction(const MachineInstr &MI);
141 void emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI);
143 void emitNEONLaneInstruction(const MachineInstr &MI);
144 void emitNEONDupInstruction(const MachineInstr &MI);
145 void emitNEON1RegModImmInstruction(const MachineInstr &MI);
146 void emitNEON2RegInstruction(const MachineInstr &MI);
147 void emitNEON3RegInstruction(const MachineInstr &MI);
149 /// getMachineOpValue - Return binary encoding of operand. If the machine
150 /// operand requires relocation, record the relocation and return zero.
151 unsigned getMachineOpValue(const MachineInstr &MI,
152 const MachineOperand &MO) const;
153 unsigned getMachineOpValue(const MachineInstr &MI, unsigned OpIdx) const {
154 return getMachineOpValue(MI, MI.getOperand(OpIdx));
157 // FIXME: The legacy JIT ARMCodeEmitter doesn't rely on the the
158 // TableGen'erated getBinaryCodeForInstr() function to encode any
159 // operand values, instead querying getMachineOpValue() directly for
160 // each operand it needs to encode. Thus, any of the new encoder
161 // helper functions can simply return 0 as the values the return
162 // are already handled elsewhere. They are placeholders to allow this
163 // encoder to continue to function until the MC encoder is sufficiently
164 // far along that this one can be eliminated entirely.
165 unsigned getCCOutOpValue(const MachineInstr &MI, unsigned Op)
167 unsigned getSOImmOpValue(const MachineInstr &MI, unsigned Op)
169 unsigned getSORegOpValue(const MachineInstr &MI, unsigned Op)
171 unsigned getRotImmOpValue(const MachineInstr &MI, unsigned Op)
173 unsigned getImmMinusOneOpValue(const MachineInstr &MI, unsigned Op)
175 unsigned getBitfieldInvertedMaskOpValue(const MachineInstr &MI,
176 unsigned Op) const { return 0; }
177 unsigned getAddrModeImm12OpValue(const MachineInstr &MI, unsigned Op)
180 // {12} = (U)nsigned (add == '1', sub == '0')
182 const MachineOperand &MO = MI.getOperand(Op);
183 const MachineOperand &MO1 = MI.getOperand(Op + 1);
185 emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry);
188 unsigned Reg = getARMRegisterNumbering(MO.getReg());
189 int32_t Imm12 = MO1.getImm();
191 Binary = Imm12 & 0xfff;
194 Binary |= (Reg << 13);
197 unsigned getNEONVcvtImm32OpValue(const MachineInstr &MI, unsigned Op)
200 unsigned getRegisterListOpValue(const MachineInstr &MI, unsigned Op)
203 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
204 /// machine operand requires relocation, record the relocation and return
206 unsigned getMovi32Value(const MachineInstr &MI,const MachineOperand &MO,
209 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
211 unsigned getShiftOp(unsigned Imm) const ;
213 /// Routines that handle operands which add machine relocations which are
214 /// fixed up by the relocation stage.
215 void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
216 bool MayNeedFarStub, bool Indirect,
217 intptr_t ACPV = 0) const;
218 void emitExternalSymbolAddress(const char *ES, unsigned Reloc) const;
219 void emitConstPoolAddress(unsigned CPI, unsigned Reloc) const;
220 void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const;
221 void emitMachineBasicBlock(MachineBasicBlock *BB, unsigned Reloc,
222 intptr_t JTBase = 0) const;
226 char ARMCodeEmitter::ID = 0;
228 /// createARMJITCodeEmitterPass - Return a pass that emits the collected ARM
229 /// code to the specified MCE object.
230 FunctionPass *llvm::createARMJITCodeEmitterPass(ARMBaseTargetMachine &TM,
231 JITCodeEmitter &JCE) {
232 return new ARMCodeEmitter(TM, JCE);
235 bool ARMCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
236 assert((MF.getTarget().getRelocationModel() != Reloc::Default ||
237 MF.getTarget().getRelocationModel() != Reloc::Static) &&
238 "JIT relocation model must be set to static or default!");
239 JTI = ((ARMTargetMachine &)MF.getTarget()).getJITInfo();
240 II = ((const ARMTargetMachine &)MF.getTarget()).getInstrInfo();
241 TD = ((const ARMTargetMachine &)MF.getTarget()).getTargetData();
242 Subtarget = &TM.getSubtarget<ARMSubtarget>();
243 MCPEs = &MF.getConstantPool()->getConstants();
245 if (MF.getJumpTableInfo()) MJTEs = &MF.getJumpTableInfo()->getJumpTables();
246 IsPIC = TM.getRelocationModel() == Reloc::PIC_;
247 IsThumb = MF.getInfo<ARMFunctionInfo>()->isThumbFunction();
248 JTI->Initialize(MF, IsPIC);
249 MMI = &getAnalysis<MachineModuleInfo>();
250 MCE.setModuleInfo(MMI);
253 DEBUG(errs() << "JITTing function '"
254 << MF.getFunction()->getName() << "'\n");
255 MCE.startFunction(MF);
256 for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
258 MCE.StartMachineBasicBlock(MBB);
259 for (MachineBasicBlock::const_iterator I = MBB->begin(), E = MBB->end();
263 } while (MCE.finishFunction(MF));
268 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
270 unsigned ARMCodeEmitter::getShiftOp(unsigned Imm) const {
271 switch (ARM_AM::getAM2ShiftOpc(Imm)) {
272 default: llvm_unreachable("Unknown shift opc!");
273 case ARM_AM::asr: return 2;
274 case ARM_AM::lsl: return 0;
275 case ARM_AM::lsr: return 1;
277 case ARM_AM::rrx: return 3;
282 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
283 /// machine operand requires relocation, record the relocation and return zero.
284 unsigned ARMCodeEmitter::getMovi32Value(const MachineInstr &MI,
285 const MachineOperand &MO,
287 assert(((Reloc == ARM::reloc_arm_movt) || (Reloc == ARM::reloc_arm_movw))
288 && "Relocation to this function should be for movt or movw");
291 return static_cast<unsigned>(MO.getImm());
292 else if (MO.isGlobal())
293 emitGlobalAddress(MO.getGlobal(), Reloc, true, false);
294 else if (MO.isSymbol())
295 emitExternalSymbolAddress(MO.getSymbolName(), Reloc);
297 emitMachineBasicBlock(MO.getMBB(), Reloc);
302 llvm_unreachable("Unsupported operand type for movw/movt");
307 /// getMachineOpValue - Return binary encoding of operand. If the machine
308 /// operand requires relocation, record the relocation and return zero.
309 unsigned ARMCodeEmitter::getMachineOpValue(const MachineInstr &MI,
310 const MachineOperand &MO) const {
312 return getARMRegisterNumbering(MO.getReg());
314 return static_cast<unsigned>(MO.getImm());
315 else if (MO.isGlobal())
316 emitGlobalAddress(MO.getGlobal(), ARM::reloc_arm_branch, true, false);
317 else if (MO.isSymbol())
318 emitExternalSymbolAddress(MO.getSymbolName(), ARM::reloc_arm_branch);
319 else if (MO.isCPI()) {
320 const TargetInstrDesc &TID = MI.getDesc();
321 // For VFP load, the immediate offset is multiplied by 4.
322 unsigned Reloc = ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPLdStFrm)
323 ? ARM::reloc_arm_vfp_cp_entry : ARM::reloc_arm_cp_entry;
324 emitConstPoolAddress(MO.getIndex(), Reloc);
325 } else if (MO.isJTI())
326 emitJumpTableAddress(MO.getIndex(), ARM::reloc_arm_relative);
328 emitMachineBasicBlock(MO.getMBB(), ARM::reloc_arm_branch);
338 /// emitGlobalAddress - Emit the specified address to the code stream.
340 void ARMCodeEmitter::emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
341 bool MayNeedFarStub, bool Indirect,
342 intptr_t ACPV) const {
343 MachineRelocation MR = Indirect
344 ? MachineRelocation::getIndirectSymbol(MCE.getCurrentPCOffset(), Reloc,
345 const_cast<GlobalValue *>(GV),
346 ACPV, MayNeedFarStub)
347 : MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc,
348 const_cast<GlobalValue *>(GV), ACPV,
350 MCE.addRelocation(MR);
353 /// emitExternalSymbolAddress - Arrange for the address of an external symbol to
354 /// be emitted to the current location in the function, and allow it to be PC
356 void ARMCodeEmitter::
357 emitExternalSymbolAddress(const char *ES, unsigned Reloc) const {
358 MCE.addRelocation(MachineRelocation::getExtSym(MCE.getCurrentPCOffset(),
362 /// emitConstPoolAddress - Arrange for the address of an constant pool
363 /// to be emitted to the current location in the function, and allow it to be PC
365 void ARMCodeEmitter::emitConstPoolAddress(unsigned CPI, unsigned Reloc) const {
366 // Tell JIT emitter we'll resolve the address.
367 MCE.addRelocation(MachineRelocation::getConstPool(MCE.getCurrentPCOffset(),
368 Reloc, CPI, 0, true));
371 /// emitJumpTableAddress - Arrange for the address of a jump table to
372 /// be emitted to the current location in the function, and allow it to be PC
374 void ARMCodeEmitter::
375 emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const {
376 MCE.addRelocation(MachineRelocation::getJumpTable(MCE.getCurrentPCOffset(),
377 Reloc, JTIndex, 0, true));
380 /// emitMachineBasicBlock - Emit the specified address basic block.
381 void ARMCodeEmitter::emitMachineBasicBlock(MachineBasicBlock *BB,
383 intptr_t JTBase) const {
384 MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(),
388 void ARMCodeEmitter::emitWordLE(unsigned Binary) {
389 DEBUG(errs() << " 0x";
390 errs().write_hex(Binary) << "\n");
391 MCE.emitWordLE(Binary);
394 void ARMCodeEmitter::emitDWordLE(uint64_t Binary) {
395 DEBUG(errs() << " 0x";
396 errs().write_hex(Binary) << "\n");
397 MCE.emitDWordLE(Binary);
400 void ARMCodeEmitter::emitInstruction(const MachineInstr &MI) {
401 DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << MI);
403 MCE.processDebugLoc(MI.getDebugLoc(), true);
405 ++NumEmitted; // Keep track of the # of mi's emitted
406 switch (MI.getDesc().TSFlags & ARMII::FormMask) {
408 llvm_unreachable("Unhandled instruction encoding format!");
412 emitPseudoInstruction(MI);
415 case ARMII::DPSoRegFrm:
416 emitDataProcessingInstruction(MI);
420 emitLoadStoreInstruction(MI);
422 case ARMII::LdMiscFrm:
423 case ARMII::StMiscFrm:
424 emitMiscLoadStoreInstruction(MI);
426 case ARMII::LdStMulFrm:
427 emitLoadStoreMultipleInstruction(MI);
430 emitMulFrmInstruction(MI);
433 emitExtendInstruction(MI);
435 case ARMII::ArithMiscFrm:
436 emitMiscArithInstruction(MI);
439 emitSaturateInstruction(MI);
442 emitBranchInstruction(MI);
444 case ARMII::BrMiscFrm:
445 emitMiscBranchInstruction(MI);
448 case ARMII::VFPUnaryFrm:
449 case ARMII::VFPBinaryFrm:
450 emitVFPArithInstruction(MI);
452 case ARMII::VFPConv1Frm:
453 case ARMII::VFPConv2Frm:
454 case ARMII::VFPConv3Frm:
455 case ARMII::VFPConv4Frm:
456 case ARMII::VFPConv5Frm:
457 emitVFPConversionInstruction(MI);
459 case ARMII::VFPLdStFrm:
460 emitVFPLoadStoreInstruction(MI);
462 case ARMII::VFPLdStMulFrm:
463 emitVFPLoadStoreMultipleInstruction(MI);
466 // NEON instructions.
467 case ARMII::NGetLnFrm:
468 case ARMII::NSetLnFrm:
469 emitNEONLaneInstruction(MI);
472 emitNEONDupInstruction(MI);
474 case ARMII::N1RegModImmFrm:
475 emitNEON1RegModImmInstruction(MI);
477 case ARMII::N2RegFrm:
478 emitNEON2RegInstruction(MI);
480 case ARMII::N3RegFrm:
481 emitNEON3RegInstruction(MI);
484 MCE.processDebugLoc(MI.getDebugLoc(), false);
487 void ARMCodeEmitter::emitConstPoolInstruction(const MachineInstr &MI) {
488 unsigned CPI = MI.getOperand(0).getImm(); // CP instruction index.
489 unsigned CPIndex = MI.getOperand(1).getIndex(); // Actual cp entry index.
490 const MachineConstantPoolEntry &MCPE = (*MCPEs)[CPIndex];
492 // Remember the CONSTPOOL_ENTRY address for later relocation.
493 JTI->addConstantPoolEntryAddr(CPI, MCE.getCurrentPCValue());
495 // Emit constpool island entry. In most cases, the actual values will be
496 // resolved and relocated after code emission.
497 if (MCPE.isMachineConstantPoolEntry()) {
498 ARMConstantPoolValue *ACPV =
499 static_cast<ARMConstantPoolValue*>(MCPE.Val.MachineCPVal);
501 DEBUG(errs() << " ** ARM constant pool #" << CPI << " @ "
502 << (void*)MCE.getCurrentPCValue() << " " << *ACPV << '\n');
504 assert(ACPV->isGlobalValue() && "unsupported constant pool value");
505 const GlobalValue *GV = ACPV->getGV();
507 Reloc::Model RelocM = TM.getRelocationModel();
508 emitGlobalAddress(GV, ARM::reloc_arm_machine_cp_entry,
510 Subtarget->GVIsIndirectSymbol(GV, RelocM),
513 emitExternalSymbolAddress(ACPV->getSymbol(), ARM::reloc_arm_absolute);
517 const Constant *CV = MCPE.Val.ConstVal;
520 errs() << " ** Constant pool #" << CPI << " @ "
521 << (void*)MCE.getCurrentPCValue() << " ";
522 if (const Function *F = dyn_cast<Function>(CV))
523 errs() << F->getName();
529 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
530 emitGlobalAddress(GV, ARM::reloc_arm_absolute, isa<Function>(GV), false);
532 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
533 uint32_t Val = uint32_t(*CI->getValue().getRawData());
535 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
536 if (CFP->getType()->isFloatTy())
537 emitWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
538 else if (CFP->getType()->isDoubleTy())
539 emitDWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
541 llvm_unreachable("Unable to handle this constantpool entry!");
544 llvm_unreachable("Unable to handle this constantpool entry!");
549 void ARMCodeEmitter::emitMOVi32immInstruction(const MachineInstr &MI) {
550 const MachineOperand &MO0 = MI.getOperand(0);
551 const MachineOperand &MO1 = MI.getOperand(1);
553 // Emit the 'movw' instruction.
554 unsigned Binary = 0x30 << 20; // mov: Insts{27-20} = 0b00110000
556 unsigned Lo16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movw) & 0xFFFF;
558 // Set the conditional execution predicate.
559 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
562 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
564 // Encode imm16 as imm4:imm12
565 Binary |= Lo16 & 0xFFF; // Insts{11-0} = imm12
566 Binary |= ((Lo16 >> 12) & 0xF) << 16; // Insts{19-16} = imm4
569 unsigned Hi16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movt) >> 16;
570 // Emit the 'movt' instruction.
571 Binary = 0x34 << 20; // movt: Insts{27-20} = 0b00110100
573 // Set the conditional execution predicate.
574 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
577 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
579 // Encode imm16 as imm4:imm1, same as movw above.
580 Binary |= Hi16 & 0xFFF;
581 Binary |= ((Hi16 >> 12) & 0xF) << 16;
585 void ARMCodeEmitter::emitMOVi2piecesInstruction(const MachineInstr &MI) {
586 const MachineOperand &MO0 = MI.getOperand(0);
587 const MachineOperand &MO1 = MI.getOperand(1);
588 assert(MO1.isImm() && ARM_AM::isSOImmTwoPartVal(MO1.getImm()) &&
589 "Not a valid so_imm value!");
590 unsigned V1 = ARM_AM::getSOImmTwoPartFirst(MO1.getImm());
591 unsigned V2 = ARM_AM::getSOImmTwoPartSecond(MO1.getImm());
593 // Emit the 'mov' instruction.
594 unsigned Binary = 0xd << 21; // mov: Insts{24-21} = 0b1101
596 // Set the conditional execution predicate.
597 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
600 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
603 // Set bit I(25) to identify this is the immediate form of <shifter_op>
604 Binary |= 1 << ARMII::I_BitShift;
605 Binary |= getMachineSoImmOpValue(V1);
608 // Now the 'orr' instruction.
609 Binary = 0xc << 21; // orr: Insts{24-21} = 0b1100
611 // Set the conditional execution predicate.
612 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
615 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
618 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRnShift;
621 // Set bit I(25) to identify this is the immediate form of <shifter_op>
622 Binary |= 1 << ARMII::I_BitShift;
623 Binary |= getMachineSoImmOpValue(V2);
627 void ARMCodeEmitter::emitLEApcrelJTInstruction(const MachineInstr &MI) {
628 // It's basically add r, pc, (LJTI - $+8)
630 const TargetInstrDesc &TID = MI.getDesc();
632 // Emit the 'add' instruction.
633 unsigned Binary = 0x4 << 21; // add: Insts{24-31} = 0b0100
635 // Set the conditional execution predicate
636 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
638 // Encode S bit if MI modifies CPSR.
639 Binary |= getAddrModeSBit(MI, TID);
642 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
644 // Encode Rn which is PC.
645 Binary |= getARMRegisterNumbering(ARM::PC) << ARMII::RegRnShift;
647 // Encode the displacement.
648 Binary |= 1 << ARMII::I_BitShift;
649 emitJumpTableAddress(MI.getOperand(1).getIndex(), ARM::reloc_arm_jt_base);
654 void ARMCodeEmitter::emitPseudoMoveInstruction(const MachineInstr &MI) {
655 unsigned Opcode = MI.getDesc().Opcode;
657 // Part of binary is determined by TableGn.
658 unsigned Binary = getBinaryCodeForInstr(MI);
660 // Set the conditional execution predicate
661 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
663 // Encode S bit if MI modifies CPSR.
664 if (Opcode == ARM::MOVsrl_flag || Opcode == ARM::MOVsra_flag)
665 Binary |= 1 << ARMII::S_BitShift;
667 // Encode register def if there is one.
668 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
670 // Encode the shift operation.
677 case ARM::MOVsrl_flag:
679 Binary |= (0x2 << 4) | (1 << 7);
681 case ARM::MOVsra_flag:
683 Binary |= (0x4 << 4) | (1 << 7);
687 // Encode register Rm.
688 Binary |= getMachineOpValue(MI, 1);
693 void ARMCodeEmitter::addPCLabel(unsigned LabelID) {
694 DEBUG(errs() << " ** LPC" << LabelID << " @ "
695 << (void*)MCE.getCurrentPCValue() << '\n');
696 JTI->addPCLabelAddr(LabelID, MCE.getCurrentPCValue());
699 void ARMCodeEmitter::emitPseudoInstruction(const MachineInstr &MI) {
700 unsigned Opcode = MI.getDesc().Opcode;
703 llvm_unreachable("ARMCodeEmitter::emitPseudoInstruction");
707 case ARM::BMOVPCRXr9: {
708 // First emit mov lr, pc
709 unsigned Binary = 0x01a0e00f;
710 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
713 // and then emit the branch.
714 emitMiscBranchInstruction(MI);
717 case TargetOpcode::INLINEASM: {
718 // We allow inline assembler nodes with empty bodies - they can
719 // implicitly define registers, which is ok for JIT.
720 if (MI.getOperand(0).getSymbolName()[0]) {
721 report_fatal_error("JIT does not support inline asm!");
725 case TargetOpcode::PROLOG_LABEL:
726 case TargetOpcode::EH_LABEL:
727 MCE.emitLabel(MI.getOperand(0).getMCSymbol());
729 case TargetOpcode::IMPLICIT_DEF:
730 case TargetOpcode::KILL:
733 case ARM::CONSTPOOL_ENTRY:
734 emitConstPoolInstruction(MI);
737 // Remember of the address of the PC label for relocation later.
738 addPCLabel(MI.getOperand(2).getImm());
739 // PICADD is just an add instruction that implicitly read pc.
740 emitDataProcessingInstruction(MI, 0, ARM::PC);
747 // Remember of the address of the PC label for relocation later.
748 addPCLabel(MI.getOperand(2).getImm());
749 // These are just load / store instructions that implicitly read pc.
750 emitLoadStoreInstruction(MI, 0, ARM::PC);
757 // Remember of the address of the PC label for relocation later.
758 addPCLabel(MI.getOperand(2).getImm());
759 // These are just load / store instructions that implicitly read pc.
760 emitMiscLoadStoreInstruction(MI, ARM::PC);
765 emitMOVi32immInstruction(MI);
768 case ARM::MOVi2pieces:
769 // Two instructions to materialize a constant.
770 emitMOVi2piecesInstruction(MI);
772 case ARM::LEApcrelJT:
773 // Materialize jumptable address.
774 emitLEApcrelJTInstruction(MI);
777 case ARM::MOVsrl_flag:
778 case ARM::MOVsra_flag:
779 emitPseudoMoveInstruction(MI);
784 unsigned ARMCodeEmitter::getMachineSoRegOpValue(const MachineInstr &MI,
785 const TargetInstrDesc &TID,
786 const MachineOperand &MO,
788 unsigned Binary = getMachineOpValue(MI, MO);
790 const MachineOperand &MO1 = MI.getOperand(OpIdx + 1);
791 const MachineOperand &MO2 = MI.getOperand(OpIdx + 2);
792 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO2.getImm());
794 // Encode the shift opcode.
796 unsigned Rs = MO1.getReg();
798 // Set shift operand (bit[7:4]).
803 // RRX - 0110 and bit[11:8] clear.
805 default: llvm_unreachable("Unknown shift opc!");
806 case ARM_AM::lsl: SBits = 0x1; break;
807 case ARM_AM::lsr: SBits = 0x3; break;
808 case ARM_AM::asr: SBits = 0x5; break;
809 case ARM_AM::ror: SBits = 0x7; break;
810 case ARM_AM::rrx: SBits = 0x6; break;
813 // Set shift operand (bit[6:4]).
819 default: llvm_unreachable("Unknown shift opc!");
820 case ARM_AM::lsl: SBits = 0x0; break;
821 case ARM_AM::lsr: SBits = 0x2; break;
822 case ARM_AM::asr: SBits = 0x4; break;
823 case ARM_AM::ror: SBits = 0x6; break;
826 Binary |= SBits << 4;
827 if (SOpc == ARM_AM::rrx)
830 // Encode the shift operation Rs or shift_imm (except rrx).
832 // Encode Rs bit[11:8].
833 assert(ARM_AM::getSORegOffset(MO2.getImm()) == 0);
834 return Binary | (getARMRegisterNumbering(Rs) << ARMII::RegRsShift);
837 // Encode shift_imm bit[11:7].
838 return Binary | ARM_AM::getSORegOffset(MO2.getImm()) << 7;
841 unsigned ARMCodeEmitter::getMachineSoImmOpValue(unsigned SoImm) {
842 int SoImmVal = ARM_AM::getSOImmVal(SoImm);
843 assert(SoImmVal != -1 && "Not a valid so_imm value!");
845 // Encode rotate_imm.
846 unsigned Binary = (ARM_AM::getSOImmValRot((unsigned)SoImmVal) >> 1)
847 << ARMII::SoRotImmShift;
850 Binary |= ARM_AM::getSOImmValImm((unsigned)SoImmVal);
854 unsigned ARMCodeEmitter::getAddrModeSBit(const MachineInstr &MI,
855 const TargetInstrDesc &TID) const {
856 for (unsigned i = MI.getNumOperands(), e = TID.getNumOperands(); i != e; --i){
857 const MachineOperand &MO = MI.getOperand(i-1);
858 if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR)
859 return 1 << ARMII::S_BitShift;
864 void ARMCodeEmitter::emitDataProcessingInstruction(const MachineInstr &MI,
866 unsigned ImplicitRn) {
867 const TargetInstrDesc &TID = MI.getDesc();
869 // Part of binary is determined by TableGn.
870 unsigned Binary = getBinaryCodeForInstr(MI);
872 // Set the conditional execution predicate
873 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
875 // Encode S bit if MI modifies CPSR.
876 Binary |= getAddrModeSBit(MI, TID);
878 // Encode register def if there is one.
879 unsigned NumDefs = TID.getNumDefs();
882 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
884 // Special handling for implicit use (e.g. PC).
885 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
887 if (TID.Opcode == ARM::MOVi16) {
888 // Get immediate from MI.
889 unsigned Lo16 = getMovi32Value(MI, MI.getOperand(OpIdx),
890 ARM::reloc_arm_movw);
891 // Encode imm which is the same as in emitMOVi32immInstruction().
892 Binary |= Lo16 & 0xFFF;
893 Binary |= ((Lo16 >> 12) & 0xF) << 16;
896 } else if(TID.Opcode == ARM::MOVTi16) {
897 unsigned Hi16 = (getMovi32Value(MI, MI.getOperand(OpIdx),
898 ARM::reloc_arm_movt) >> 16);
899 Binary |= Hi16 & 0xFFF;
900 Binary |= ((Hi16 >> 12) & 0xF) << 16;
903 } else if ((TID.Opcode == ARM::BFC) || (TID.Opcode == ARM::BFI)) {
904 uint32_t v = ~MI.getOperand(2).getImm();
905 int32_t lsb = CountTrailingZeros_32(v);
906 int32_t msb = (32 - CountLeadingZeros_32(v)) - 1;
907 // Instr{20-16} = msb, Instr{11-7} = lsb
908 Binary |= (msb & 0x1F) << 16;
909 Binary |= (lsb & 0x1F) << 7;
912 } else if ((TID.Opcode == ARM::UBFX) || (TID.Opcode == ARM::SBFX)) {
913 // Encode Rn in Instr{0-3}
914 Binary |= getMachineOpValue(MI, OpIdx++);
916 uint32_t lsb = MI.getOperand(OpIdx++).getImm();
917 uint32_t widthm1 = MI.getOperand(OpIdx++).getImm() - 1;
919 // Instr{20-16} = widthm1, Instr{11-7} = lsb
920 Binary |= (widthm1 & 0x1F) << 16;
921 Binary |= (lsb & 0x1F) << 7;
926 // If this is a two-address operand, skip it. e.g. MOVCCr operand 1.
927 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
930 // Encode first non-shifter register operand if there is one.
931 bool isUnary = TID.TSFlags & ARMII::UnaryDP;
934 // Special handling for implicit use (e.g. PC).
935 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
937 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRnShift;
942 // Encode shifter operand.
943 const MachineOperand &MO = MI.getOperand(OpIdx);
944 if ((TID.TSFlags & ARMII::FormMask) == ARMII::DPSoRegFrm) {
946 emitWordLE(Binary | getMachineSoRegOpValue(MI, TID, MO, OpIdx));
951 // Encode register Rm.
952 emitWordLE(Binary | getARMRegisterNumbering(MO.getReg()));
957 Binary |= getMachineSoImmOpValue((unsigned)MO.getImm());
962 void ARMCodeEmitter::emitLoadStoreInstruction(const MachineInstr &MI,
964 unsigned ImplicitRn) {
965 const TargetInstrDesc &TID = MI.getDesc();
966 unsigned Form = TID.TSFlags & ARMII::FormMask;
967 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
969 // Part of binary is determined by TableGn.
970 unsigned Binary = getBinaryCodeForInstr(MI);
972 // If this is an LDRi12, STRi12 or LDRcp, nothing more needs be done.
973 if (MI.getOpcode() == ARM::LDRi12 || MI.getOpcode() == ARM::LDRcp ||
974 MI.getOpcode() == ARM::STRi12) {
979 // Set the conditional execution predicate
980 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
984 // Operand 0 of a pre- and post-indexed store is the address base
985 // writeback. Skip it.
986 bool Skipped = false;
987 if (IsPrePost && Form == ARMII::StFrm) {
994 // Special handling for implicit use (e.g. PC).
995 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
997 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
999 // Set second operand
1001 // Special handling for implicit use (e.g. PC).
1002 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1004 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1006 // If this is a two-address operand, skip it. e.g. LDR_PRE.
1007 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1010 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1011 unsigned AM2Opc = (ImplicitRn == ARM::PC)
1012 ? 0 : MI.getOperand(OpIdx+1).getImm();
1014 // Set bit U(23) according to sign of immed value (positive or negative).
1015 Binary |= ((ARM_AM::getAM2Op(AM2Opc) == ARM_AM::add ? 1 : 0) <<
1017 if (!MO2.getReg()) { // is immediate
1018 if (ARM_AM::getAM2Offset(AM2Opc))
1019 // Set the value of offset_12 field
1020 Binary |= ARM_AM::getAM2Offset(AM2Opc);
1025 // Set bit I(25), because this is not in immediate encoding.
1026 Binary |= 1 << ARMII::I_BitShift;
1027 assert(TargetRegisterInfo::isPhysicalRegister(MO2.getReg()));
1028 // Set bit[3:0] to the corresponding Rm register
1029 Binary |= getARMRegisterNumbering(MO2.getReg());
1031 // If this instr is in scaled register offset/index instruction, set
1032 // shift_immed(bit[11:7]) and shift(bit[6:5]) fields.
1033 if (unsigned ShImm = ARM_AM::getAM2Offset(AM2Opc)) {
1034 Binary |= getShiftOp(AM2Opc) << ARMII::ShiftImmShift; // shift
1035 Binary |= ShImm << ARMII::ShiftShift; // shift_immed
1041 void ARMCodeEmitter::emitMiscLoadStoreInstruction(const MachineInstr &MI,
1042 unsigned ImplicitRn) {
1043 const TargetInstrDesc &TID = MI.getDesc();
1044 unsigned Form = TID.TSFlags & ARMII::FormMask;
1045 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1047 // Part of binary is determined by TableGn.
1048 unsigned Binary = getBinaryCodeForInstr(MI);
1050 // Set the conditional execution predicate
1051 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1055 // Operand 0 of a pre- and post-indexed store is the address base
1056 // writeback. Skip it.
1057 bool Skipped = false;
1058 if (IsPrePost && Form == ARMII::StMiscFrm) {
1063 // Set first operand
1064 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1066 // Skip LDRD and STRD's second operand.
1067 if (TID.Opcode == ARM::LDRD || TID.Opcode == ARM::STRD)
1070 // Set second operand
1072 // Special handling for implicit use (e.g. PC).
1073 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1075 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1077 // If this is a two-address operand, skip it. e.g. LDRH_POST.
1078 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1081 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1082 unsigned AM3Opc = (ImplicitRn == ARM::PC)
1083 ? 0 : MI.getOperand(OpIdx+1).getImm();
1085 // Set bit U(23) according to sign of immed value (positive or negative)
1086 Binary |= ((ARM_AM::getAM3Op(AM3Opc) == ARM_AM::add ? 1 : 0) <<
1089 // If this instr is in register offset/index encoding, set bit[3:0]
1090 // to the corresponding Rm register.
1092 Binary |= getARMRegisterNumbering(MO2.getReg());
1097 // This instr is in immediate offset/index encoding, set bit 22 to 1.
1098 Binary |= 1 << ARMII::AM3_I_BitShift;
1099 if (unsigned ImmOffs = ARM_AM::getAM3Offset(AM3Opc)) {
1101 Binary |= (ImmOffs >> 4) << ARMII::ImmHiShift; // immedH
1102 Binary |= (ImmOffs & 0xF); // immedL
1108 static unsigned getAddrModeUPBits(unsigned Mode) {
1109 unsigned Binary = 0;
1111 // Set addressing mode by modifying bits U(23) and P(24)
1112 // IA - Increment after - bit U = 1 and bit P = 0
1113 // IB - Increment before - bit U = 1 and bit P = 1
1114 // DA - Decrement after - bit U = 0 and bit P = 0
1115 // DB - Decrement before - bit U = 0 and bit P = 1
1117 default: llvm_unreachable("Unknown addressing sub-mode!");
1118 case ARM_AM::da: break;
1119 case ARM_AM::db: Binary |= 0x1 << ARMII::P_BitShift; break;
1120 case ARM_AM::ia: Binary |= 0x1 << ARMII::U_BitShift; break;
1121 case ARM_AM::ib: Binary |= 0x3 << ARMII::U_BitShift; break;
1127 void ARMCodeEmitter::emitLoadStoreMultipleInstruction(const MachineInstr &MI) {
1128 const TargetInstrDesc &TID = MI.getDesc();
1129 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1131 // Part of binary is determined by TableGn.
1132 unsigned Binary = getBinaryCodeForInstr(MI);
1134 // Set the conditional execution predicate
1135 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1137 // Skip operand 0 of an instruction with base register update.
1142 // Set base address operand
1143 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1145 // Set addressing mode by modifying bits U(23) and P(24)
1146 const MachineOperand &MO = MI.getOperand(OpIdx++);
1147 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(MO.getImm()));
1151 Binary |= 0x1 << ARMII::W_BitShift;
1154 for (unsigned i = OpIdx+2, e = MI.getNumOperands(); i != e; ++i) {
1155 const MachineOperand &MO = MI.getOperand(i);
1156 if (!MO.isReg() || MO.isImplicit())
1158 unsigned RegNum = getARMRegisterNumbering(MO.getReg());
1159 assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
1161 Binary |= 0x1 << RegNum;
1167 void ARMCodeEmitter::emitMulFrmInstruction(const MachineInstr &MI) {
1168 const TargetInstrDesc &TID = MI.getDesc();
1170 // Part of binary is determined by TableGn.
1171 unsigned Binary = getBinaryCodeForInstr(MI);
1173 // Set the conditional execution predicate
1174 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1176 // Encode S bit if MI modifies CPSR.
1177 Binary |= getAddrModeSBit(MI, TID);
1179 // 32x32->64bit operations have two destination registers. The number
1180 // of register definitions will tell us if that's what we're dealing with.
1182 if (TID.getNumDefs() == 2)
1183 Binary |= getMachineOpValue (MI, OpIdx++) << ARMII::RegRdLoShift;
1186 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdHiShift;
1189 Binary |= getMachineOpValue(MI, OpIdx++);
1192 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRsShift;
1194 // Many multiple instructions (e.g. MLA) have three src operands. Encode
1195 // it as Rn (for multiply, that's in the same offset as RdLo.
1196 if (TID.getNumOperands() > OpIdx &&
1197 !TID.OpInfo[OpIdx].isPredicate() &&
1198 !TID.OpInfo[OpIdx].isOptionalDef())
1199 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRdLoShift;
1204 void ARMCodeEmitter::emitExtendInstruction(const MachineInstr &MI) {
1205 const TargetInstrDesc &TID = MI.getDesc();
1207 // Part of binary is determined by TableGn.
1208 unsigned Binary = getBinaryCodeForInstr(MI);
1210 // Set the conditional execution predicate
1211 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1216 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1218 const MachineOperand &MO1 = MI.getOperand(OpIdx++);
1219 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1221 // Two register operand form.
1223 Binary |= getMachineOpValue(MI, MO1) << ARMII::RegRnShift;
1226 Binary |= getMachineOpValue(MI, MO2);
1229 Binary |= getMachineOpValue(MI, MO1);
1232 // Encode rot imm (0, 8, 16, or 24) if it has a rotate immediate operand.
1233 if (MI.getOperand(OpIdx).isImm() &&
1234 !TID.OpInfo[OpIdx].isPredicate() &&
1235 !TID.OpInfo[OpIdx].isOptionalDef())
1236 Binary |= (getMachineOpValue(MI, OpIdx) / 8) << ARMII::ExtRotImmShift;
1241 void ARMCodeEmitter::emitMiscArithInstruction(const MachineInstr &MI) {
1242 const TargetInstrDesc &TID = MI.getDesc();
1244 // Part of binary is determined by TableGn.
1245 unsigned Binary = getBinaryCodeForInstr(MI);
1247 // Set the conditional execution predicate
1248 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1253 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1255 const MachineOperand &MO = MI.getOperand(OpIdx++);
1256 if (OpIdx == TID.getNumOperands() ||
1257 TID.OpInfo[OpIdx].isPredicate() ||
1258 TID.OpInfo[OpIdx].isOptionalDef()) {
1259 // Encode Rm and it's done.
1260 Binary |= getMachineOpValue(MI, MO);
1266 Binary |= getMachineOpValue(MI, MO) << ARMII::RegRnShift;
1269 Binary |= getMachineOpValue(MI, OpIdx++);
1271 // Encode shift_imm.
1272 unsigned ShiftAmt = MI.getOperand(OpIdx).getImm();
1273 if (TID.Opcode == ARM::PKHTB) {
1274 assert(ShiftAmt != 0 && "PKHTB shift_imm is 0!");
1278 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1279 Binary |= ShiftAmt << ARMII::ShiftShift;
1284 void ARMCodeEmitter::emitSaturateInstruction(const MachineInstr &MI) {
1285 const TargetInstrDesc &TID = MI.getDesc();
1287 // Part of binary is determined by TableGen.
1288 unsigned Binary = getBinaryCodeForInstr(MI);
1290 // Set the conditional execution predicate
1291 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1294 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
1296 // Encode saturate bit position.
1297 unsigned Pos = MI.getOperand(1).getImm();
1298 if (TID.Opcode == ARM::SSAT || TID.Opcode == ARM::SSAT16)
1300 assert((Pos < 16 || (Pos < 32 &&
1301 TID.Opcode != ARM::SSAT16 &&
1302 TID.Opcode != ARM::USAT16)) &&
1303 "saturate bit position out of range");
1304 Binary |= Pos << 16;
1307 Binary |= getMachineOpValue(MI, 2);
1309 // Encode shift_imm.
1310 if (TID.getNumOperands() == 4) {
1311 unsigned ShiftOp = MI.getOperand(3).getImm();
1312 ARM_AM::ShiftOpc Opc = ARM_AM::getSORegShOp(ShiftOp);
1313 if (Opc == ARM_AM::asr)
1315 unsigned ShiftAmt = MI.getOperand(3).getImm();
1316 if (ShiftAmt == 32 && Opc == ARM_AM::asr)
1318 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1319 Binary |= ShiftAmt << ARMII::ShiftShift;
1325 void ARMCodeEmitter::emitBranchInstruction(const MachineInstr &MI) {
1326 const TargetInstrDesc &TID = MI.getDesc();
1328 if (TID.Opcode == ARM::TPsoft) {
1329 llvm_unreachable("ARM::TPsoft FIXME"); // FIXME
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;
1338 // Set signed_immed_24 field
1339 Binary |= getMachineOpValue(MI, 0);
1344 void ARMCodeEmitter::emitInlineJumpTable(unsigned JTIndex) {
1345 // Remember the base address of the inline jump table.
1346 uintptr_t JTBase = MCE.getCurrentPCValue();
1347 JTI->addJumpTableBaseAddr(JTIndex, JTBase);
1348 DEBUG(errs() << " ** Jump Table #" << JTIndex << " @ " << (void*)JTBase
1351 // Now emit the jump table entries.
1352 const std::vector<MachineBasicBlock*> &MBBs = (*MJTEs)[JTIndex].MBBs;
1353 for (unsigned i = 0, e = MBBs.size(); i != e; ++i) {
1355 // DestBB address - JT base.
1356 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_pic_jt, JTBase);
1358 // Absolute DestBB address.
1359 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_absolute);
1364 void ARMCodeEmitter::emitMiscBranchInstruction(const MachineInstr &MI) {
1365 const TargetInstrDesc &TID = MI.getDesc();
1367 // Handle jump tables.
1368 if (TID.Opcode == ARM::BR_JTr || TID.Opcode == ARM::BR_JTadd) {
1369 // First emit a ldr pc, [] instruction.
1370 emitDataProcessingInstruction(MI, ARM::PC);
1372 // Then emit the inline jump table.
1374 (TID.Opcode == ARM::BR_JTr)
1375 ? MI.getOperand(1).getIndex() : MI.getOperand(2).getIndex();
1376 emitInlineJumpTable(JTIndex);
1378 } else if (TID.Opcode == ARM::BR_JTm) {
1379 // First emit a ldr pc, [] instruction.
1380 emitLoadStoreInstruction(MI, ARM::PC);
1382 // Then emit the inline jump table.
1383 emitInlineJumpTable(MI.getOperand(3).getIndex());
1387 // Part of binary is determined by TableGn.
1388 unsigned Binary = getBinaryCodeForInstr(MI);
1390 // Set the conditional execution predicate
1391 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1393 if (TID.Opcode == ARM::BX_RET || TID.Opcode == ARM::MOVPCLR)
1394 // The return register is LR.
1395 Binary |= getARMRegisterNumbering(ARM::LR);
1397 // otherwise, set the return register
1398 Binary |= getMachineOpValue(MI, 0);
1403 static unsigned encodeVFPRd(const MachineInstr &MI, unsigned OpIdx) {
1404 unsigned RegD = MI.getOperand(OpIdx).getReg();
1405 unsigned Binary = 0;
1406 bool isSPVFP = ARM::SPRRegisterClass->contains(RegD);
1407 RegD = getARMRegisterNumbering(RegD);
1409 Binary |= RegD << ARMII::RegRdShift;
1411 Binary |= ((RegD & 0x1E) >> 1) << ARMII::RegRdShift;
1412 Binary |= (RegD & 0x01) << ARMII::D_BitShift;
1417 static unsigned encodeVFPRn(const MachineInstr &MI, unsigned OpIdx) {
1418 unsigned RegN = MI.getOperand(OpIdx).getReg();
1419 unsigned Binary = 0;
1420 bool isSPVFP = ARM::SPRRegisterClass->contains(RegN);
1421 RegN = getARMRegisterNumbering(RegN);
1423 Binary |= RegN << ARMII::RegRnShift;
1425 Binary |= ((RegN & 0x1E) >> 1) << ARMII::RegRnShift;
1426 Binary |= (RegN & 0x01) << ARMII::N_BitShift;
1431 static unsigned encodeVFPRm(const MachineInstr &MI, unsigned OpIdx) {
1432 unsigned RegM = MI.getOperand(OpIdx).getReg();
1433 unsigned Binary = 0;
1434 bool isSPVFP = ARM::SPRRegisterClass->contains(RegM);
1435 RegM = getARMRegisterNumbering(RegM);
1439 Binary |= ((RegM & 0x1E) >> 1);
1440 Binary |= (RegM & 0x01) << ARMII::M_BitShift;
1445 void ARMCodeEmitter::emitVFPArithInstruction(const MachineInstr &MI) {
1446 const TargetInstrDesc &TID = MI.getDesc();
1448 // Part of binary is determined by TableGn.
1449 unsigned Binary = getBinaryCodeForInstr(MI);
1451 // Set the conditional execution predicate
1452 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1455 assert((Binary & ARMII::D_BitShift) == 0 &&
1456 (Binary & ARMII::N_BitShift) == 0 &&
1457 (Binary & ARMII::M_BitShift) == 0 && "VFP encoding bug!");
1460 Binary |= encodeVFPRd(MI, OpIdx++);
1462 // If this is a two-address operand, skip it, e.g. FMACD.
1463 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1467 if ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPBinaryFrm)
1468 Binary |= encodeVFPRn(MI, OpIdx++);
1470 if (OpIdx == TID.getNumOperands() ||
1471 TID.OpInfo[OpIdx].isPredicate() ||
1472 TID.OpInfo[OpIdx].isOptionalDef()) {
1473 // FCMPEZD etc. has only one operand.
1479 Binary |= encodeVFPRm(MI, OpIdx);
1484 void ARMCodeEmitter::emitVFPConversionInstruction(const MachineInstr &MI) {
1485 const TargetInstrDesc &TID = MI.getDesc();
1486 unsigned Form = TID.TSFlags & ARMII::FormMask;
1488 // Part of binary is determined by TableGn.
1489 unsigned Binary = getBinaryCodeForInstr(MI);
1491 // Set the conditional execution predicate
1492 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1496 case ARMII::VFPConv1Frm:
1497 case ARMII::VFPConv2Frm:
1498 case ARMII::VFPConv3Frm:
1500 Binary |= encodeVFPRd(MI, 0);
1502 case ARMII::VFPConv4Frm:
1504 Binary |= encodeVFPRn(MI, 0);
1506 case ARMII::VFPConv5Frm:
1508 Binary |= encodeVFPRm(MI, 0);
1514 case ARMII::VFPConv1Frm:
1516 Binary |= encodeVFPRm(MI, 1);
1518 case ARMII::VFPConv2Frm:
1519 case ARMII::VFPConv3Frm:
1521 Binary |= encodeVFPRn(MI, 1);
1523 case ARMII::VFPConv4Frm:
1524 case ARMII::VFPConv5Frm:
1526 Binary |= encodeVFPRd(MI, 1);
1530 if (Form == ARMII::VFPConv5Frm)
1532 Binary |= encodeVFPRn(MI, 2);
1533 else if (Form == ARMII::VFPConv3Frm)
1535 Binary |= encodeVFPRm(MI, 2);
1540 void ARMCodeEmitter::emitVFPLoadStoreInstruction(const MachineInstr &MI) {
1541 // Part of binary is determined by TableGn.
1542 unsigned Binary = getBinaryCodeForInstr(MI);
1544 // Set the conditional execution predicate
1545 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1550 Binary |= encodeVFPRd(MI, OpIdx++);
1552 // Encode address base.
1553 const MachineOperand &Base = MI.getOperand(OpIdx++);
1554 Binary |= getMachineOpValue(MI, Base) << ARMII::RegRnShift;
1556 // If there is a non-zero immediate offset, encode it.
1558 const MachineOperand &Offset = MI.getOperand(OpIdx);
1559 if (unsigned ImmOffs = ARM_AM::getAM5Offset(Offset.getImm())) {
1560 if (ARM_AM::getAM5Op(Offset.getImm()) == ARM_AM::add)
1561 Binary |= 1 << ARMII::U_BitShift;
1568 // If immediate offset is omitted, default to +0.
1569 Binary |= 1 << ARMII::U_BitShift;
1575 ARMCodeEmitter::emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI) {
1576 const TargetInstrDesc &TID = MI.getDesc();
1577 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
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;
1585 // Skip operand 0 of an instruction with base register update.
1590 // Set base address operand
1591 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1593 // Set addressing mode by modifying bits U(23) and P(24)
1594 const MachineOperand &MO = MI.getOperand(OpIdx++);
1595 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(MO.getImm()));
1599 Binary |= 0x1 << ARMII::W_BitShift;
1601 // First register is encoded in Dd.
1602 Binary |= encodeVFPRd(MI, OpIdx+2);
1604 // Count the number of registers.
1605 unsigned NumRegs = 1;
1606 for (unsigned i = OpIdx+3, e = MI.getNumOperands(); i != e; ++i) {
1607 const MachineOperand &MO = MI.getOperand(i);
1608 if (!MO.isReg() || MO.isImplicit())
1612 // Bit 8 will be set if <list> is consecutive 64-bit registers (e.g., D0)
1613 // Otherwise, it will be 0, in the case of 32-bit registers.
1615 Binary |= NumRegs * 2;
1622 static unsigned encodeNEONRd(const MachineInstr &MI, unsigned OpIdx) {
1623 unsigned RegD = MI.getOperand(OpIdx).getReg();
1624 unsigned Binary = 0;
1625 RegD = getARMRegisterNumbering(RegD);
1626 Binary |= (RegD & 0xf) << ARMII::RegRdShift;
1627 Binary |= ((RegD >> 4) & 1) << ARMII::D_BitShift;
1631 static unsigned encodeNEONRn(const MachineInstr &MI, unsigned OpIdx) {
1632 unsigned RegN = MI.getOperand(OpIdx).getReg();
1633 unsigned Binary = 0;
1634 RegN = getARMRegisterNumbering(RegN);
1635 Binary |= (RegN & 0xf) << ARMII::RegRnShift;
1636 Binary |= ((RegN >> 4) & 1) << ARMII::N_BitShift;
1640 static unsigned encodeNEONRm(const MachineInstr &MI, unsigned OpIdx) {
1641 unsigned RegM = MI.getOperand(OpIdx).getReg();
1642 unsigned Binary = 0;
1643 RegM = getARMRegisterNumbering(RegM);
1644 Binary |= (RegM & 0xf);
1645 Binary |= ((RegM >> 4) & 1) << ARMII::M_BitShift;
1649 /// convertNEONDataProcToThumb - Convert the ARM mode encoding for a NEON
1650 /// data-processing instruction to the corresponding Thumb encoding.
1651 static unsigned convertNEONDataProcToThumb(unsigned Binary) {
1652 assert((Binary & 0xfe000000) == 0xf2000000 &&
1653 "not an ARM NEON data-processing instruction");
1654 unsigned UBit = (Binary >> 24) & 1;
1655 return 0xef000000 | (UBit << 28) | (Binary & 0xffffff);
1658 void ARMCodeEmitter::emitNEONLaneInstruction(const MachineInstr &MI) {
1659 unsigned Binary = getBinaryCodeForInstr(MI);
1661 unsigned RegTOpIdx, RegNOpIdx, LnOpIdx;
1662 const TargetInstrDesc &TID = MI.getDesc();
1663 if ((TID.TSFlags & ARMII::FormMask) == ARMII::NGetLnFrm) {
1667 } else { // ARMII::NSetLnFrm
1673 // Set the conditional execution predicate
1674 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1676 unsigned RegT = MI.getOperand(RegTOpIdx).getReg();
1677 RegT = getARMRegisterNumbering(RegT);
1678 Binary |= (RegT << ARMII::RegRdShift);
1679 Binary |= encodeNEONRn(MI, RegNOpIdx);
1682 if ((Binary & (1 << 22)) != 0)
1683 LaneShift = 0; // 8-bit elements
1684 else if ((Binary & (1 << 5)) != 0)
1685 LaneShift = 1; // 16-bit elements
1687 LaneShift = 2; // 32-bit elements
1689 unsigned Lane = MI.getOperand(LnOpIdx).getImm() << LaneShift;
1690 unsigned Opc1 = Lane >> 2;
1691 unsigned Opc2 = Lane & 3;
1692 assert((Opc1 & 3) == 0 && "out-of-range lane number operand");
1693 Binary |= (Opc1 << 21);
1694 Binary |= (Opc2 << 5);
1699 void ARMCodeEmitter::emitNEONDupInstruction(const MachineInstr &MI) {
1700 unsigned Binary = getBinaryCodeForInstr(MI);
1702 // Set the conditional execution predicate
1703 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1705 unsigned RegT = MI.getOperand(1).getReg();
1706 RegT = getARMRegisterNumbering(RegT);
1707 Binary |= (RegT << ARMII::RegRdShift);
1708 Binary |= encodeNEONRn(MI, 0);
1712 void ARMCodeEmitter::emitNEON1RegModImmInstruction(const MachineInstr &MI) {
1713 unsigned Binary = getBinaryCodeForInstr(MI);
1714 // Destination register is encoded in Dd.
1715 Binary |= encodeNEONRd(MI, 0);
1716 // Immediate fields: Op, Cmode, I, Imm3, Imm4
1717 unsigned Imm = MI.getOperand(1).getImm();
1718 unsigned Op = (Imm >> 12) & 1;
1719 unsigned Cmode = (Imm >> 8) & 0xf;
1720 unsigned I = (Imm >> 7) & 1;
1721 unsigned Imm3 = (Imm >> 4) & 0x7;
1722 unsigned Imm4 = Imm & 0xf;
1723 Binary |= (I << 24) | (Imm3 << 16) | (Cmode << 8) | (Op << 5) | Imm4;
1725 Binary = convertNEONDataProcToThumb(Binary);
1729 void ARMCodeEmitter::emitNEON2RegInstruction(const MachineInstr &MI) {
1730 const TargetInstrDesc &TID = MI.getDesc();
1731 unsigned Binary = getBinaryCodeForInstr(MI);
1732 // Destination register is encoded in Dd; source register in Dm.
1734 Binary |= encodeNEONRd(MI, OpIdx++);
1735 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1737 Binary |= encodeNEONRm(MI, OpIdx);
1739 Binary = convertNEONDataProcToThumb(Binary);
1740 // FIXME: This does not handle VDUPfdf or VDUPfqf.
1744 void ARMCodeEmitter::emitNEON3RegInstruction(const MachineInstr &MI) {
1745 const TargetInstrDesc &TID = MI.getDesc();
1746 unsigned Binary = getBinaryCodeForInstr(MI);
1747 // Destination register is encoded in Dd; source registers in Dn and Dm.
1749 Binary |= encodeNEONRd(MI, OpIdx++);
1750 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1752 Binary |= encodeNEONRn(MI, OpIdx++);
1753 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1755 Binary |= encodeNEONRm(MI, OpIdx);
1757 Binary = convertNEONDataProcToThumb(Binary);
1758 // FIXME: This does not handle VMOVDneon or VMOVQ.
1762 #include "ARMGenCodeEmitter.inc"