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 emitConstantToMemory(unsigned CPI, const Constant *CV);
92 void emitConstPoolInstruction(const MachineInstr &MI);
93 void emitMOVi32immInstruction(const MachineInstr &MI);
94 void emitMOVi2piecesInstruction(const MachineInstr &MI);
95 void emitLEApcrelInstruction(const MachineInstr &MI);
96 void emitLEApcrelJTInstruction(const MachineInstr &MI);
97 void emitPseudoMoveInstruction(const MachineInstr &MI);
98 void addPCLabel(unsigned LabelID);
99 void emitPseudoInstruction(const MachineInstr &MI);
100 unsigned getMachineSoRegOpValue(const MachineInstr &MI,
101 const TargetInstrDesc &TID,
102 const MachineOperand &MO,
105 unsigned getMachineSoImmOpValue(unsigned SoImm);
106 unsigned getAddrModeSBit(const MachineInstr &MI,
107 const TargetInstrDesc &TID) const;
109 void emitDataProcessingInstruction(const MachineInstr &MI,
110 unsigned ImplicitRd = 0,
111 unsigned ImplicitRn = 0);
113 void emitLoadStoreInstruction(const MachineInstr &MI,
114 unsigned ImplicitRd = 0,
115 unsigned ImplicitRn = 0);
117 void emitMiscLoadStoreInstruction(const MachineInstr &MI,
118 unsigned ImplicitRn = 0);
120 void emitLoadStoreMultipleInstruction(const MachineInstr &MI);
122 void emitMulFrmInstruction(const MachineInstr &MI);
124 void emitExtendInstruction(const MachineInstr &MI);
126 void emitMiscArithInstruction(const MachineInstr &MI);
128 void emitSaturateInstruction(const MachineInstr &MI);
130 void emitBranchInstruction(const MachineInstr &MI);
132 void emitInlineJumpTable(unsigned JTIndex);
134 void emitMiscBranchInstruction(const MachineInstr &MI);
136 void emitVFPArithInstruction(const MachineInstr &MI);
138 void emitVFPConversionInstruction(const MachineInstr &MI);
140 void emitVFPLoadStoreInstruction(const MachineInstr &MI);
142 void emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI);
144 void emitNEONLaneInstruction(const MachineInstr &MI);
145 void emitNEONDupInstruction(const MachineInstr &MI);
146 void emitNEON1RegModImmInstruction(const MachineInstr &MI);
147 void emitNEON2RegInstruction(const MachineInstr &MI);
148 void emitNEON3RegInstruction(const MachineInstr &MI);
150 /// getMachineOpValue - Return binary encoding of operand. If the machine
151 /// operand requires relocation, record the relocation and return zero.
152 unsigned getMachineOpValue(const MachineInstr &MI,
153 const MachineOperand &MO) const;
154 unsigned getMachineOpValue(const MachineInstr &MI, unsigned OpIdx) const {
155 return getMachineOpValue(MI, MI.getOperand(OpIdx));
158 // FIXME: The legacy JIT ARMCodeEmitter doesn't rely on the the
159 // TableGen'erated getBinaryCodeForInstr() function to encode any
160 // operand values, instead querying getMachineOpValue() directly for
161 // each operand it needs to encode. Thus, any of the new encoder
162 // helper functions can simply return 0 as the values the return
163 // are already handled elsewhere. They are placeholders to allow this
164 // encoder to continue to function until the MC encoder is sufficiently
165 // far along that this one can be eliminated entirely.
166 unsigned NEONThumb2DataIPostEncoder(const MachineInstr &MI, unsigned Val)
168 unsigned NEONThumb2LoadStorePostEncoder(const MachineInstr &MI,unsigned Val)
170 unsigned NEONThumb2DupPostEncoder(const MachineInstr &MI,unsigned Val)
172 unsigned getBranchTargetOpValue(const MachineInstr &MI, unsigned Op)
174 unsigned getCCOutOpValue(const MachineInstr &MI, unsigned Op)
176 unsigned getSOImmOpValue(const MachineInstr &MI, unsigned Op)
178 unsigned getT2SOImmOpValue(const MachineInstr &MI, unsigned Op)
180 unsigned getSORegOpValue(const MachineInstr &MI, unsigned Op)
182 unsigned getT2SORegOpValue(const MachineInstr &MI, unsigned Op)
184 unsigned getRotImmOpValue(const MachineInstr &MI, unsigned Op)
186 unsigned getImmMinusOneOpValue(const MachineInstr &MI, unsigned Op)
188 unsigned getAddrMode6AddressOpValue(const MachineInstr &MI, unsigned Op)
190 unsigned getAddrMode6OffsetOpValue(const MachineInstr &MI, unsigned Op)
192 unsigned getBitfieldInvertedMaskOpValue(const MachineInstr &MI,
193 unsigned Op) const { return 0; }
194 uint32_t getLdStmModeOpValue(const MachineInstr &MI, unsigned OpIdx)
196 uint32_t getLdStSORegOpValue(const MachineInstr &MI, unsigned OpIdx)
199 unsigned getAddrModeImm12OpValue(const MachineInstr &MI, unsigned Op)
202 // {12} = (U)nsigned (add == '1', sub == '0')
204 const MachineOperand &MO = MI.getOperand(Op);
205 const MachineOperand &MO1 = MI.getOperand(Op + 1);
207 emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry);
210 unsigned Reg = getARMRegisterNumbering(MO.getReg());
211 int32_t Imm12 = MO1.getImm();
213 Binary = Imm12 & 0xfff;
216 Binary |= (Reg << 13);
219 uint32_t getAddrMode2OpValue(const MachineInstr &MI, unsigned OpIdx)
221 uint32_t getAddrMode2OffsetOpValue(const MachineInstr &MI, unsigned OpIdx)
223 uint32_t getAddrMode3OffsetOpValue(const MachineInstr &MI, unsigned OpIdx)
225 uint32_t getAddrMode3OpValue(const MachineInstr &MI, unsigned Op) const
227 uint32_t getAddrMode5OpValue(const MachineInstr &MI, unsigned Op) const {
229 // {8} = (U)nsigned (add == '1', sub == '0')
231 const MachineOperand &MO = MI.getOperand(Op);
232 const MachineOperand &MO1 = MI.getOperand(Op + 1);
234 emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry);
237 unsigned Reg = getARMRegisterNumbering(MO.getReg());
238 int32_t Imm8 = MO1.getImm();
240 Binary = Imm8 & 0xff;
243 Binary |= (Reg << 9);
246 unsigned getNEONVcvtImm32OpValue(const MachineInstr &MI, unsigned Op)
249 unsigned getRegisterListOpValue(const MachineInstr &MI, unsigned Op)
252 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
253 /// machine operand requires relocation, record the relocation and return
255 unsigned getMovi32Value(const MachineInstr &MI,const MachineOperand &MO,
258 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
260 unsigned getShiftOp(unsigned Imm) const ;
262 /// Routines that handle operands which add machine relocations which are
263 /// fixed up by the relocation stage.
264 void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
265 bool MayNeedFarStub, bool Indirect,
266 intptr_t ACPV = 0) const;
267 void emitExternalSymbolAddress(const char *ES, unsigned Reloc) const;
268 void emitConstPoolAddress(unsigned CPI, unsigned Reloc) const;
269 void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const;
270 void emitMachineBasicBlock(MachineBasicBlock *BB, unsigned Reloc,
271 intptr_t JTBase = 0) const;
275 char ARMCodeEmitter::ID = 0;
277 /// createARMJITCodeEmitterPass - Return a pass that emits the collected ARM
278 /// code to the specified MCE object.
279 FunctionPass *llvm::createARMJITCodeEmitterPass(ARMBaseTargetMachine &TM,
280 JITCodeEmitter &JCE) {
281 return new ARMCodeEmitter(TM, JCE);
284 bool ARMCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
285 assert((MF.getTarget().getRelocationModel() != Reloc::Default ||
286 MF.getTarget().getRelocationModel() != Reloc::Static) &&
287 "JIT relocation model must be set to static or default!");
288 JTI = ((ARMTargetMachine &)MF.getTarget()).getJITInfo();
289 II = ((const ARMTargetMachine &)MF.getTarget()).getInstrInfo();
290 TD = ((const ARMTargetMachine &)MF.getTarget()).getTargetData();
291 Subtarget = &TM.getSubtarget<ARMSubtarget>();
292 MCPEs = &MF.getConstantPool()->getConstants();
294 if (MF.getJumpTableInfo()) MJTEs = &MF.getJumpTableInfo()->getJumpTables();
295 IsPIC = TM.getRelocationModel() == Reloc::PIC_;
296 IsThumb = MF.getInfo<ARMFunctionInfo>()->isThumbFunction();
297 JTI->Initialize(MF, IsPIC);
298 MMI = &getAnalysis<MachineModuleInfo>();
299 MCE.setModuleInfo(MMI);
302 DEBUG(errs() << "JITTing function '"
303 << MF.getFunction()->getName() << "'\n");
304 MCE.startFunction(MF);
305 for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
307 MCE.StartMachineBasicBlock(MBB);
308 for (MachineBasicBlock::const_iterator I = MBB->begin(), E = MBB->end();
312 } while (MCE.finishFunction(MF));
317 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
319 unsigned ARMCodeEmitter::getShiftOp(unsigned Imm) const {
320 switch (ARM_AM::getAM2ShiftOpc(Imm)) {
321 default: llvm_unreachable("Unknown shift opc!");
322 case ARM_AM::asr: return 2;
323 case ARM_AM::lsl: return 0;
324 case ARM_AM::lsr: return 1;
326 case ARM_AM::rrx: return 3;
331 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
332 /// machine operand requires relocation, record the relocation and return zero.
333 unsigned ARMCodeEmitter::getMovi32Value(const MachineInstr &MI,
334 const MachineOperand &MO,
336 assert(((Reloc == ARM::reloc_arm_movt) || (Reloc == ARM::reloc_arm_movw))
337 && "Relocation to this function should be for movt or movw");
340 return static_cast<unsigned>(MO.getImm());
341 else if (MO.isGlobal())
342 emitGlobalAddress(MO.getGlobal(), Reloc, true, false);
343 else if (MO.isSymbol())
344 emitExternalSymbolAddress(MO.getSymbolName(), Reloc);
346 emitMachineBasicBlock(MO.getMBB(), Reloc);
351 llvm_unreachable("Unsupported operand type for movw/movt");
356 /// getMachineOpValue - Return binary encoding of operand. If the machine
357 /// operand requires relocation, record the relocation and return zero.
358 unsigned ARMCodeEmitter::getMachineOpValue(const MachineInstr &MI,
359 const MachineOperand &MO) const {
361 return getARMRegisterNumbering(MO.getReg());
363 return static_cast<unsigned>(MO.getImm());
364 else if (MO.isGlobal())
365 emitGlobalAddress(MO.getGlobal(), ARM::reloc_arm_branch, true, false);
366 else if (MO.isSymbol())
367 emitExternalSymbolAddress(MO.getSymbolName(), ARM::reloc_arm_branch);
368 else if (MO.isCPI()) {
369 const TargetInstrDesc &TID = MI.getDesc();
370 // For VFP load, the immediate offset is multiplied by 4.
371 unsigned Reloc = ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPLdStFrm)
372 ? ARM::reloc_arm_vfp_cp_entry : ARM::reloc_arm_cp_entry;
373 emitConstPoolAddress(MO.getIndex(), Reloc);
374 } else if (MO.isJTI())
375 emitJumpTableAddress(MO.getIndex(), ARM::reloc_arm_relative);
377 emitMachineBasicBlock(MO.getMBB(), ARM::reloc_arm_branch);
387 /// emitGlobalAddress - Emit the specified address to the code stream.
389 void ARMCodeEmitter::emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
390 bool MayNeedFarStub, bool Indirect,
391 intptr_t ACPV) const {
392 MachineRelocation MR = Indirect
393 ? MachineRelocation::getIndirectSymbol(MCE.getCurrentPCOffset(), Reloc,
394 const_cast<GlobalValue *>(GV),
395 ACPV, MayNeedFarStub)
396 : MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc,
397 const_cast<GlobalValue *>(GV), ACPV,
399 MCE.addRelocation(MR);
402 /// emitExternalSymbolAddress - Arrange for the address of an external symbol to
403 /// be emitted to the current location in the function, and allow it to be PC
405 void ARMCodeEmitter::
406 emitExternalSymbolAddress(const char *ES, unsigned Reloc) const {
407 MCE.addRelocation(MachineRelocation::getExtSym(MCE.getCurrentPCOffset(),
411 /// emitConstPoolAddress - Arrange for the address of an constant pool
412 /// to be emitted to the current location in the function, and allow it to be PC
414 void ARMCodeEmitter::emitConstPoolAddress(unsigned CPI, unsigned Reloc) const {
415 // Tell JIT emitter we'll resolve the address.
416 MCE.addRelocation(MachineRelocation::getConstPool(MCE.getCurrentPCOffset(),
417 Reloc, CPI, 0, true));
420 /// emitJumpTableAddress - Arrange for the address of a jump table to
421 /// be emitted to the current location in the function, and allow it to be PC
423 void ARMCodeEmitter::
424 emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const {
425 MCE.addRelocation(MachineRelocation::getJumpTable(MCE.getCurrentPCOffset(),
426 Reloc, JTIndex, 0, true));
429 /// emitMachineBasicBlock - Emit the specified address basic block.
430 void ARMCodeEmitter::emitMachineBasicBlock(MachineBasicBlock *BB,
432 intptr_t JTBase) const {
433 MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(),
437 void ARMCodeEmitter::emitWordLE(unsigned Binary) {
438 DEBUG(errs() << " 0x";
439 errs().write_hex(Binary) << "\n");
440 MCE.emitWordLE(Binary);
443 void ARMCodeEmitter::emitDWordLE(uint64_t Binary) {
444 DEBUG(errs() << " 0x";
445 errs().write_hex(Binary) << "\n");
446 MCE.emitDWordLE(Binary);
449 void ARMCodeEmitter::emitInstruction(const MachineInstr &MI) {
450 DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << MI);
452 MCE.processDebugLoc(MI.getDebugLoc(), true);
454 ++NumEmitted; // Keep track of the # of mi's emitted
455 switch (MI.getDesc().TSFlags & ARMII::FormMask) {
457 llvm_unreachable("Unhandled instruction encoding format!");
461 emitPseudoInstruction(MI);
464 case ARMII::DPSoRegFrm:
465 emitDataProcessingInstruction(MI);
469 emitLoadStoreInstruction(MI);
471 case ARMII::LdMiscFrm:
472 case ARMII::StMiscFrm:
473 emitMiscLoadStoreInstruction(MI);
475 case ARMII::LdStMulFrm:
476 emitLoadStoreMultipleInstruction(MI);
479 emitMulFrmInstruction(MI);
482 emitExtendInstruction(MI);
484 case ARMII::ArithMiscFrm:
485 emitMiscArithInstruction(MI);
488 emitSaturateInstruction(MI);
491 emitBranchInstruction(MI);
493 case ARMII::BrMiscFrm:
494 emitMiscBranchInstruction(MI);
497 case ARMII::VFPUnaryFrm:
498 case ARMII::VFPBinaryFrm:
499 emitVFPArithInstruction(MI);
501 case ARMII::VFPConv1Frm:
502 case ARMII::VFPConv2Frm:
503 case ARMII::VFPConv3Frm:
504 case ARMII::VFPConv4Frm:
505 case ARMII::VFPConv5Frm:
506 emitVFPConversionInstruction(MI);
508 case ARMII::VFPLdStFrm:
509 emitVFPLoadStoreInstruction(MI);
511 case ARMII::VFPLdStMulFrm:
512 emitVFPLoadStoreMultipleInstruction(MI);
515 // NEON instructions.
516 case ARMII::NGetLnFrm:
517 case ARMII::NSetLnFrm:
518 emitNEONLaneInstruction(MI);
521 emitNEONDupInstruction(MI);
523 case ARMII::N1RegModImmFrm:
524 emitNEON1RegModImmInstruction(MI);
526 case ARMII::N2RegFrm:
527 emitNEON2RegInstruction(MI);
529 case ARMII::N3RegFrm:
530 emitNEON3RegInstruction(MI);
533 MCE.processDebugLoc(MI.getDebugLoc(), false);
536 void ARMCodeEmitter::emitConstantToMemory(unsigned CPI, const Constant *C) {
538 errs() << " ** Constant pool #" << CPI << " @ "
539 << (void*)MCE.getCurrentPCValue() << " ";
540 if (const Function *F = dyn_cast<Function>(C))
541 errs() << F->getName();
547 switch (C->getValueID()) {
549 llvm_unreachable("Unable to handle this constantpool entry!");
552 case Value::GlobalVariableVal: {
553 emitGlobalAddress(static_cast<const GlobalValue*>(C),
554 ARM::reloc_arm_absolute, isa<Function>(C), false);
558 case Value::ConstantIntVal: {
559 const ConstantInt *CI = static_cast<const ConstantInt*>(C);
560 uint32_t Val = *(uint32_t*)CI->getValue().getRawData();
564 case Value::ConstantFPVal: {
565 const ConstantFP *CFP = static_cast<const ConstantFP*>(C);
566 if (CFP->getType()->isFloatTy())
567 emitWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
568 else if (CFP->getType()->isDoubleTy())
569 emitDWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
571 llvm_unreachable("Unable to handle this constantpool entry!");
575 case Value::ConstantArrayVal: {
576 const ConstantArray *CA = static_cast<const ConstantArray*>(C);
577 for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i)
578 emitConstantToMemory(CPI, CA->getOperand(i));
586 void ARMCodeEmitter::emitConstPoolInstruction(const MachineInstr &MI) {
587 unsigned CPI = MI.getOperand(0).getImm(); // CP instruction index.
588 unsigned CPIndex = MI.getOperand(1).getIndex(); // Actual cp entry index.
589 const MachineConstantPoolEntry &MCPE = (*MCPEs)[CPIndex];
591 // Remember the CONSTPOOL_ENTRY address for later relocation.
592 JTI->addConstantPoolEntryAddr(CPI, MCE.getCurrentPCValue());
594 // Emit constpool island entry. In most cases, the actual values will be
595 // resolved and relocated after code emission.
596 if (MCPE.isMachineConstantPoolEntry()) {
597 ARMConstantPoolValue *ACPV =
598 static_cast<ARMConstantPoolValue*>(MCPE.Val.MachineCPVal);
600 DEBUG(errs() << " ** ARM constant pool #" << CPI << " @ "
601 << (void*)MCE.getCurrentPCValue() << " " << *ACPV << '\n');
603 assert(ACPV->isGlobalValue() && "unsupported constant pool value");
604 const GlobalValue *GV = ACPV->getGV();
606 Reloc::Model RelocM = TM.getRelocationModel();
607 emitGlobalAddress(GV, ARM::reloc_arm_machine_cp_entry,
609 Subtarget->GVIsIndirectSymbol(GV, RelocM),
612 emitExternalSymbolAddress(ACPV->getSymbol(), ARM::reloc_arm_absolute);
616 emitConstantToMemory(CPI, MCPE.Val.ConstVal);
620 void ARMCodeEmitter::emitMOVi32immInstruction(const MachineInstr &MI) {
621 const MachineOperand &MO0 = MI.getOperand(0);
622 const MachineOperand &MO1 = MI.getOperand(1);
624 // Emit the 'movw' instruction.
625 unsigned Binary = 0x30 << 20; // mov: Insts{27-20} = 0b00110000
627 unsigned Lo16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movw) & 0xFFFF;
629 // Set the conditional execution predicate.
630 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
633 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
635 // Encode imm16 as imm4:imm12
636 Binary |= Lo16 & 0xFFF; // Insts{11-0} = imm12
637 Binary |= ((Lo16 >> 12) & 0xF) << 16; // Insts{19-16} = imm4
640 unsigned Hi16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movt) >> 16;
641 // Emit the 'movt' instruction.
642 Binary = 0x34 << 20; // movt: Insts{27-20} = 0b00110100
644 // Set the conditional execution predicate.
645 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
648 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
650 // Encode imm16 as imm4:imm1, same as movw above.
651 Binary |= Hi16 & 0xFFF;
652 Binary |= ((Hi16 >> 12) & 0xF) << 16;
656 void ARMCodeEmitter::emitMOVi2piecesInstruction(const MachineInstr &MI) {
657 const MachineOperand &MO0 = MI.getOperand(0);
658 const MachineOperand &MO1 = MI.getOperand(1);
659 assert(MO1.isImm() && ARM_AM::isSOImmTwoPartVal(MO1.getImm()) &&
660 "Not a valid so_imm value!");
661 unsigned V1 = ARM_AM::getSOImmTwoPartFirst(MO1.getImm());
662 unsigned V2 = ARM_AM::getSOImmTwoPartSecond(MO1.getImm());
664 // Emit the 'mov' instruction.
665 unsigned Binary = 0xd << 21; // mov: Insts{24-21} = 0b1101
667 // Set the conditional execution predicate.
668 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
671 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
674 // Set bit I(25) to identify this is the immediate form of <shifter_op>
675 Binary |= 1 << ARMII::I_BitShift;
676 Binary |= getMachineSoImmOpValue(V1);
679 // Now the 'orr' instruction.
680 Binary = 0xc << 21; // orr: Insts{24-21} = 0b1100
682 // Set the conditional execution predicate.
683 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
686 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
689 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRnShift;
692 // Set bit I(25) to identify this is the immediate form of <shifter_op>
693 Binary |= 1 << ARMII::I_BitShift;
694 Binary |= getMachineSoImmOpValue(V2);
698 void ARMCodeEmitter::emitLEApcrelInstruction(const MachineInstr &MI) {
699 // It's basically add r, pc, (LCPI - $+8)
700 const TargetInstrDesc &TID = MI.getDesc();
704 // Set the conditional execution predicate
705 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
707 // Encode S bit if MI modifies CPSR.
708 Binary |= getAddrModeSBit(MI, TID);
711 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
713 // Encode Rn which is PC.
714 Binary |= getARMRegisterNumbering(ARM::PC) << ARMII::RegRnShift;
716 // Encode the displacement which is a so_imm.
717 // Set bit I(25) to identify this is the immediate form of <shifter_op>
718 Binary |= 1 << ARMII::I_BitShift;
719 emitConstPoolAddress(MI.getOperand(1).getIndex(), ARM::reloc_arm_so_imm_cp_entry);
724 void ARMCodeEmitter::emitLEApcrelJTInstruction(const MachineInstr &MI) {
725 // It's basically add r, pc, (LJTI - $+8)
727 const TargetInstrDesc &TID = MI.getDesc();
729 // Emit the 'add' instruction.
730 unsigned Binary = 0x4 << 21; // add: Insts{21-24} = 0b0100
732 // Set the conditional execution predicate
733 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
735 // Encode S bit if MI modifies CPSR.
736 Binary |= getAddrModeSBit(MI, TID);
739 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
741 // Encode Rn which is PC.
742 Binary |= getARMRegisterNumbering(ARM::PC) << ARMII::RegRnShift;
744 // Encode the displacement.
745 Binary |= 1 << ARMII::I_BitShift;
746 emitJumpTableAddress(MI.getOperand(1).getIndex(), ARM::reloc_arm_jt_base);
751 void ARMCodeEmitter::emitPseudoMoveInstruction(const MachineInstr &MI) {
752 unsigned Opcode = MI.getDesc().Opcode;
754 // Part of binary is determined by TableGn.
755 unsigned Binary = getBinaryCodeForInstr(MI);
757 // Set the conditional execution predicate
758 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
760 // Encode S bit if MI modifies CPSR.
761 if (Opcode == ARM::MOVsrl_flag || Opcode == ARM::MOVsra_flag)
762 Binary |= 1 << ARMII::S_BitShift;
764 // Encode register def if there is one.
765 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
767 // Encode the shift operation.
774 case ARM::MOVsrl_flag:
776 Binary |= (0x2 << 4) | (1 << 7);
778 case ARM::MOVsra_flag:
780 Binary |= (0x4 << 4) | (1 << 7);
784 // Encode register Rm.
785 Binary |= getMachineOpValue(MI, 1);
790 void ARMCodeEmitter::addPCLabel(unsigned LabelID) {
791 DEBUG(errs() << " ** LPC" << LabelID << " @ "
792 << (void*)MCE.getCurrentPCValue() << '\n');
793 JTI->addPCLabelAddr(LabelID, MCE.getCurrentPCValue());
796 void ARMCodeEmitter::emitPseudoInstruction(const MachineInstr &MI) {
797 unsigned Opcode = MI.getDesc().Opcode;
800 llvm_unreachable("ARMCodeEmitter::emitPseudoInstruction");
804 case ARM::BMOVPCRXr9: {
805 // First emit mov lr, pc
806 unsigned Binary = 0x01a0e00f;
807 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
810 // and then emit the branch.
811 emitMiscBranchInstruction(MI);
814 case TargetOpcode::INLINEASM: {
815 // We allow inline assembler nodes with empty bodies - they can
816 // implicitly define registers, which is ok for JIT.
817 if (MI.getOperand(0).getSymbolName()[0]) {
818 report_fatal_error("JIT does not support inline asm!");
822 case TargetOpcode::PROLOG_LABEL:
823 case TargetOpcode::EH_LABEL:
824 MCE.emitLabel(MI.getOperand(0).getMCSymbol());
826 case TargetOpcode::IMPLICIT_DEF:
827 case TargetOpcode::KILL:
830 case ARM::CONSTPOOL_ENTRY:
831 emitConstPoolInstruction(MI);
834 // Remember of the address of the PC label for relocation later.
835 addPCLabel(MI.getOperand(2).getImm());
836 // PICADD is just an add instruction that implicitly read pc.
837 emitDataProcessingInstruction(MI, 0, ARM::PC);
844 // Remember of the address of the PC label for relocation later.
845 addPCLabel(MI.getOperand(2).getImm());
846 // These are just load / store instructions that implicitly read pc.
847 emitLoadStoreInstruction(MI, 0, ARM::PC);
854 // Remember of the address of the PC label for relocation later.
855 addPCLabel(MI.getOperand(2).getImm());
856 // These are just load / store instructions that implicitly read pc.
857 emitMiscLoadStoreInstruction(MI, ARM::PC);
862 // Two instructions to materialize a constant.
863 if (Subtarget->hasV6T2Ops())
864 emitMOVi32immInstruction(MI);
866 emitMOVi2piecesInstruction(MI);
869 // Materialize constantpool index address.
870 emitLEApcrelInstruction(MI);
872 case ARM::LEApcrelJT:
873 // Materialize jumptable address.
874 emitLEApcrelJTInstruction(MI);
877 case ARM::MOVsrl_flag:
878 case ARM::MOVsra_flag:
879 emitPseudoMoveInstruction(MI);
884 unsigned ARMCodeEmitter::getMachineSoRegOpValue(const MachineInstr &MI,
885 const TargetInstrDesc &TID,
886 const MachineOperand &MO,
888 unsigned Binary = getMachineOpValue(MI, MO);
890 const MachineOperand &MO1 = MI.getOperand(OpIdx + 1);
891 const MachineOperand &MO2 = MI.getOperand(OpIdx + 2);
892 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO2.getImm());
894 // Encode the shift opcode.
896 unsigned Rs = MO1.getReg();
898 // Set shift operand (bit[7:4]).
903 // RRX - 0110 and bit[11:8] clear.
905 default: llvm_unreachable("Unknown shift opc!");
906 case ARM_AM::lsl: SBits = 0x1; break;
907 case ARM_AM::lsr: SBits = 0x3; break;
908 case ARM_AM::asr: SBits = 0x5; break;
909 case ARM_AM::ror: SBits = 0x7; break;
910 case ARM_AM::rrx: SBits = 0x6; break;
913 // Set shift operand (bit[6:4]).
919 default: llvm_unreachable("Unknown shift opc!");
920 case ARM_AM::lsl: SBits = 0x0; break;
921 case ARM_AM::lsr: SBits = 0x2; break;
922 case ARM_AM::asr: SBits = 0x4; break;
923 case ARM_AM::ror: SBits = 0x6; break;
926 Binary |= SBits << 4;
927 if (SOpc == ARM_AM::rrx)
930 // Encode the shift operation Rs or shift_imm (except rrx).
932 // Encode Rs bit[11:8].
933 assert(ARM_AM::getSORegOffset(MO2.getImm()) == 0);
934 return Binary | (getARMRegisterNumbering(Rs) << ARMII::RegRsShift);
937 // Encode shift_imm bit[11:7].
938 return Binary | ARM_AM::getSORegOffset(MO2.getImm()) << 7;
941 unsigned ARMCodeEmitter::getMachineSoImmOpValue(unsigned SoImm) {
942 int SoImmVal = ARM_AM::getSOImmVal(SoImm);
943 assert(SoImmVal != -1 && "Not a valid so_imm value!");
945 // Encode rotate_imm.
946 unsigned Binary = (ARM_AM::getSOImmValRot((unsigned)SoImmVal) >> 1)
947 << ARMII::SoRotImmShift;
950 Binary |= ARM_AM::getSOImmValImm((unsigned)SoImmVal);
954 unsigned ARMCodeEmitter::getAddrModeSBit(const MachineInstr &MI,
955 const TargetInstrDesc &TID) const {
956 for (unsigned i = MI.getNumOperands(), e = TID.getNumOperands(); i >= e; --i){
957 const MachineOperand &MO = MI.getOperand(i-1);
958 if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR)
959 return 1 << ARMII::S_BitShift;
964 void ARMCodeEmitter::emitDataProcessingInstruction(const MachineInstr &MI,
966 unsigned ImplicitRn) {
967 const TargetInstrDesc &TID = MI.getDesc();
969 // Part of binary is determined by TableGn.
970 unsigned Binary = getBinaryCodeForInstr(MI);
972 // Set the conditional execution predicate
973 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
975 // Encode S bit if MI modifies CPSR.
976 Binary |= getAddrModeSBit(MI, TID);
978 // Encode register def if there is one.
979 unsigned NumDefs = TID.getNumDefs();
982 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
984 // Special handling for implicit use (e.g. PC).
985 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
987 if (TID.Opcode == ARM::MOVi16) {
988 // Get immediate from MI.
989 unsigned Lo16 = getMovi32Value(MI, MI.getOperand(OpIdx),
990 ARM::reloc_arm_movw);
991 // Encode imm which is the same as in emitMOVi32immInstruction().
992 Binary |= Lo16 & 0xFFF;
993 Binary |= ((Lo16 >> 12) & 0xF) << 16;
996 } else if(TID.Opcode == ARM::MOVTi16) {
997 unsigned Hi16 = (getMovi32Value(MI, MI.getOperand(OpIdx),
998 ARM::reloc_arm_movt) >> 16);
999 Binary |= Hi16 & 0xFFF;
1000 Binary |= ((Hi16 >> 12) & 0xF) << 16;
1003 } else if ((TID.Opcode == ARM::BFC) || (TID.Opcode == ARM::BFI)) {
1004 uint32_t v = ~MI.getOperand(2).getImm();
1005 int32_t lsb = CountTrailingZeros_32(v);
1006 int32_t msb = (32 - CountLeadingZeros_32(v)) - 1;
1007 // Instr{20-16} = msb, Instr{11-7} = lsb
1008 Binary |= (msb & 0x1F) << 16;
1009 Binary |= (lsb & 0x1F) << 7;
1012 } else if ((TID.Opcode == ARM::UBFX) || (TID.Opcode == ARM::SBFX)) {
1013 // Encode Rn in Instr{0-3}
1014 Binary |= getMachineOpValue(MI, OpIdx++);
1016 uint32_t lsb = MI.getOperand(OpIdx++).getImm();
1017 uint32_t widthm1 = MI.getOperand(OpIdx++).getImm() - 1;
1019 // Instr{20-16} = widthm1, Instr{11-7} = lsb
1020 Binary |= (widthm1 & 0x1F) << 16;
1021 Binary |= (lsb & 0x1F) << 7;
1026 // If this is a two-address operand, skip it. e.g. MOVCCr operand 1.
1027 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1030 // Encode first non-shifter register operand if there is one.
1031 bool isUnary = TID.TSFlags & ARMII::UnaryDP;
1034 // Special handling for implicit use (e.g. PC).
1035 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1037 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRnShift;
1042 // Encode shifter operand.
1043 const MachineOperand &MO = MI.getOperand(OpIdx);
1044 if ((TID.TSFlags & ARMII::FormMask) == ARMII::DPSoRegFrm) {
1046 emitWordLE(Binary | getMachineSoRegOpValue(MI, TID, MO, OpIdx));
1051 // Encode register Rm.
1052 emitWordLE(Binary | getARMRegisterNumbering(MO.getReg()));
1057 Binary |= getMachineSoImmOpValue((unsigned)MO.getImm());
1062 void ARMCodeEmitter::emitLoadStoreInstruction(const MachineInstr &MI,
1063 unsigned ImplicitRd,
1064 unsigned ImplicitRn) {
1065 const TargetInstrDesc &TID = MI.getDesc();
1066 unsigned Form = TID.TSFlags & ARMII::FormMask;
1067 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1069 // Part of binary is determined by TableGn.
1070 unsigned Binary = getBinaryCodeForInstr(MI);
1072 // If this is an LDRi12, STRi12 or LDRcp, nothing more needs be done.
1073 if (MI.getOpcode() == ARM::LDRi12 || MI.getOpcode() == ARM::LDRcp ||
1074 MI.getOpcode() == ARM::STRi12) {
1079 // Set the conditional execution predicate
1080 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1084 // Operand 0 of a pre- and post-indexed store is the address base
1085 // writeback. Skip it.
1086 bool Skipped = false;
1087 if (IsPrePost && Form == ARMII::StFrm) {
1092 // Set first operand
1094 // Special handling for implicit use (e.g. PC).
1095 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
1097 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1099 // Set second operand
1101 // Special handling for implicit use (e.g. PC).
1102 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1104 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1106 // If this is a two-address operand, skip it. e.g. LDR_PRE.
1107 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1110 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1111 unsigned AM2Opc = (ImplicitRn == ARM::PC)
1112 ? 0 : MI.getOperand(OpIdx+1).getImm();
1114 // Set bit U(23) according to sign of immed value (positive or negative).
1115 Binary |= ((ARM_AM::getAM2Op(AM2Opc) == ARM_AM::add ? 1 : 0) <<
1117 if (!MO2.getReg()) { // is immediate
1118 if (ARM_AM::getAM2Offset(AM2Opc))
1119 // Set the value of offset_12 field
1120 Binary |= ARM_AM::getAM2Offset(AM2Opc);
1125 // Set bit I(25), because this is not in immediate encoding.
1126 Binary |= 1 << ARMII::I_BitShift;
1127 assert(TargetRegisterInfo::isPhysicalRegister(MO2.getReg()));
1128 // Set bit[3:0] to the corresponding Rm register
1129 Binary |= getARMRegisterNumbering(MO2.getReg());
1131 // If this instr is in scaled register offset/index instruction, set
1132 // shift_immed(bit[11:7]) and shift(bit[6:5]) fields.
1133 if (unsigned ShImm = ARM_AM::getAM2Offset(AM2Opc)) {
1134 Binary |= getShiftOp(AM2Opc) << ARMII::ShiftImmShift; // shift
1135 Binary |= ShImm << ARMII::ShiftShift; // shift_immed
1141 void ARMCodeEmitter::emitMiscLoadStoreInstruction(const MachineInstr &MI,
1142 unsigned ImplicitRn) {
1143 const TargetInstrDesc &TID = MI.getDesc();
1144 unsigned Form = TID.TSFlags & ARMII::FormMask;
1145 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1147 // Part of binary is determined by TableGn.
1148 unsigned Binary = getBinaryCodeForInstr(MI);
1150 // Set the conditional execution predicate
1151 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1155 // Operand 0 of a pre- and post-indexed store is the address base
1156 // writeback. Skip it.
1157 bool Skipped = false;
1158 if (IsPrePost && Form == ARMII::StMiscFrm) {
1163 // Set first operand
1164 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1166 // Skip LDRD and STRD's second operand.
1167 if (TID.Opcode == ARM::LDRD || TID.Opcode == ARM::STRD)
1170 // Set second operand
1172 // Special handling for implicit use (e.g. PC).
1173 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1175 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1177 // If this is a two-address operand, skip it. e.g. LDRH_POST.
1178 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1181 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1182 unsigned AM3Opc = (ImplicitRn == ARM::PC)
1183 ? 0 : MI.getOperand(OpIdx+1).getImm();
1185 // Set bit U(23) according to sign of immed value (positive or negative)
1186 Binary |= ((ARM_AM::getAM3Op(AM3Opc) == ARM_AM::add ? 1 : 0) <<
1189 // If this instr is in register offset/index encoding, set bit[3:0]
1190 // to the corresponding Rm register.
1192 Binary |= getARMRegisterNumbering(MO2.getReg());
1197 // This instr is in immediate offset/index encoding, set bit 22 to 1.
1198 Binary |= 1 << ARMII::AM3_I_BitShift;
1199 if (unsigned ImmOffs = ARM_AM::getAM3Offset(AM3Opc)) {
1201 Binary |= (ImmOffs >> 4) << ARMII::ImmHiShift; // immedH
1202 Binary |= (ImmOffs & 0xF); // immedL
1208 static unsigned getAddrModeUPBits(unsigned Mode) {
1209 unsigned Binary = 0;
1211 // Set addressing mode by modifying bits U(23) and P(24)
1212 // IA - Increment after - bit U = 1 and bit P = 0
1213 // IB - Increment before - bit U = 1 and bit P = 1
1214 // DA - Decrement after - bit U = 0 and bit P = 0
1215 // DB - Decrement before - bit U = 0 and bit P = 1
1217 default: llvm_unreachable("Unknown addressing sub-mode!");
1218 case ARM_AM::da: break;
1219 case ARM_AM::db: Binary |= 0x1 << ARMII::P_BitShift; break;
1220 case ARM_AM::ia: Binary |= 0x1 << ARMII::U_BitShift; break;
1221 case ARM_AM::ib: Binary |= 0x3 << ARMII::U_BitShift; break;
1227 void ARMCodeEmitter::emitLoadStoreMultipleInstruction(const MachineInstr &MI) {
1228 const TargetInstrDesc &TID = MI.getDesc();
1229 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1231 // Part of binary is determined by TableGn.
1232 unsigned Binary = getBinaryCodeForInstr(MI);
1234 // Set the conditional execution predicate
1235 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1237 // Skip operand 0 of an instruction with base register update.
1242 // Set base address operand
1243 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1245 // Set addressing mode by modifying bits U(23) and P(24)
1246 const MachineOperand &MO = MI.getOperand(OpIdx++);
1247 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(MO.getImm()));
1251 Binary |= 0x1 << ARMII::W_BitShift;
1254 for (unsigned i = OpIdx+2, e = MI.getNumOperands(); i != e; ++i) {
1255 const MachineOperand &MO = MI.getOperand(i);
1256 if (!MO.isReg() || MO.isImplicit())
1258 unsigned RegNum = getARMRegisterNumbering(MO.getReg());
1259 assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
1261 Binary |= 0x1 << RegNum;
1267 void ARMCodeEmitter::emitMulFrmInstruction(const MachineInstr &MI) {
1268 const TargetInstrDesc &TID = MI.getDesc();
1270 // Part of binary is determined by TableGn.
1271 unsigned Binary = getBinaryCodeForInstr(MI);
1273 // Set the conditional execution predicate
1274 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1276 // Encode S bit if MI modifies CPSR.
1277 Binary |= getAddrModeSBit(MI, TID);
1279 // 32x32->64bit operations have two destination registers. The number
1280 // of register definitions will tell us if that's what we're dealing with.
1282 if (TID.getNumDefs() == 2)
1283 Binary |= getMachineOpValue (MI, OpIdx++) << ARMII::RegRdLoShift;
1286 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdHiShift;
1289 Binary |= getMachineOpValue(MI, OpIdx++);
1292 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRsShift;
1294 // Many multiple instructions (e.g. MLA) have three src operands. Encode
1295 // it as Rn (for multiply, that's in the same offset as RdLo.
1296 if (TID.getNumOperands() > OpIdx &&
1297 !TID.OpInfo[OpIdx].isPredicate() &&
1298 !TID.OpInfo[OpIdx].isOptionalDef())
1299 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRdLoShift;
1304 void ARMCodeEmitter::emitExtendInstruction(const MachineInstr &MI) {
1305 const TargetInstrDesc &TID = MI.getDesc();
1307 // Part of binary is determined by TableGn.
1308 unsigned Binary = getBinaryCodeForInstr(MI);
1310 // Set the conditional execution predicate
1311 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1316 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1318 const MachineOperand &MO1 = MI.getOperand(OpIdx++);
1319 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1321 // Two register operand form.
1323 Binary |= getMachineOpValue(MI, MO1) << ARMII::RegRnShift;
1326 Binary |= getMachineOpValue(MI, MO2);
1329 Binary |= getMachineOpValue(MI, MO1);
1332 // Encode rot imm (0, 8, 16, or 24) if it has a rotate immediate operand.
1333 if (MI.getOperand(OpIdx).isImm() &&
1334 !TID.OpInfo[OpIdx].isPredicate() &&
1335 !TID.OpInfo[OpIdx].isOptionalDef())
1336 Binary |= (getMachineOpValue(MI, OpIdx) / 8) << ARMII::ExtRotImmShift;
1341 void ARMCodeEmitter::emitMiscArithInstruction(const MachineInstr &MI) {
1342 const TargetInstrDesc &TID = MI.getDesc();
1344 // Part of binary is determined by TableGn.
1345 unsigned Binary = getBinaryCodeForInstr(MI);
1347 // Set the conditional execution predicate
1348 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1353 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1355 const MachineOperand &MO = MI.getOperand(OpIdx++);
1356 if (OpIdx == TID.getNumOperands() ||
1357 TID.OpInfo[OpIdx].isPredicate() ||
1358 TID.OpInfo[OpIdx].isOptionalDef()) {
1359 // Encode Rm and it's done.
1360 Binary |= getMachineOpValue(MI, MO);
1366 Binary |= getMachineOpValue(MI, MO) << ARMII::RegRnShift;
1369 Binary |= getMachineOpValue(MI, OpIdx++);
1371 // Encode shift_imm.
1372 unsigned ShiftAmt = MI.getOperand(OpIdx).getImm();
1373 if (TID.Opcode == ARM::PKHTB) {
1374 assert(ShiftAmt != 0 && "PKHTB shift_imm is 0!");
1378 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1379 Binary |= ShiftAmt << ARMII::ShiftShift;
1384 void ARMCodeEmitter::emitSaturateInstruction(const MachineInstr &MI) {
1385 const TargetInstrDesc &TID = MI.getDesc();
1387 // Part of binary is determined by TableGen.
1388 unsigned Binary = getBinaryCodeForInstr(MI);
1390 // Set the conditional execution predicate
1391 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1394 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
1396 // Encode saturate bit position.
1397 unsigned Pos = MI.getOperand(1).getImm();
1398 if (TID.Opcode == ARM::SSAT || TID.Opcode == ARM::SSAT16)
1400 assert((Pos < 16 || (Pos < 32 &&
1401 TID.Opcode != ARM::SSAT16 &&
1402 TID.Opcode != ARM::USAT16)) &&
1403 "saturate bit position out of range");
1404 Binary |= Pos << 16;
1407 Binary |= getMachineOpValue(MI, 2);
1409 // Encode shift_imm.
1410 if (TID.getNumOperands() == 4) {
1411 unsigned ShiftOp = MI.getOperand(3).getImm();
1412 ARM_AM::ShiftOpc Opc = ARM_AM::getSORegShOp(ShiftOp);
1413 if (Opc == ARM_AM::asr)
1415 unsigned ShiftAmt = MI.getOperand(3).getImm();
1416 if (ShiftAmt == 32 && Opc == ARM_AM::asr)
1418 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1419 Binary |= ShiftAmt << ARMII::ShiftShift;
1425 void ARMCodeEmitter::emitBranchInstruction(const MachineInstr &MI) {
1426 const TargetInstrDesc &TID = MI.getDesc();
1428 if (TID.Opcode == ARM::TPsoft) {
1429 llvm_unreachable("ARM::TPsoft FIXME"); // FIXME
1432 // Part of binary is determined by TableGn.
1433 unsigned Binary = getBinaryCodeForInstr(MI);
1435 // Set the conditional execution predicate
1436 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1438 // Set signed_immed_24 field
1439 Binary |= getMachineOpValue(MI, 0);
1444 void ARMCodeEmitter::emitInlineJumpTable(unsigned JTIndex) {
1445 // Remember the base address of the inline jump table.
1446 uintptr_t JTBase = MCE.getCurrentPCValue();
1447 JTI->addJumpTableBaseAddr(JTIndex, JTBase);
1448 DEBUG(errs() << " ** Jump Table #" << JTIndex << " @ " << (void*)JTBase
1451 // Now emit the jump table entries.
1452 const std::vector<MachineBasicBlock*> &MBBs = (*MJTEs)[JTIndex].MBBs;
1453 for (unsigned i = 0, e = MBBs.size(); i != e; ++i) {
1455 // DestBB address - JT base.
1456 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_pic_jt, JTBase);
1458 // Absolute DestBB address.
1459 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_absolute);
1464 void ARMCodeEmitter::emitMiscBranchInstruction(const MachineInstr &MI) {
1465 const TargetInstrDesc &TID = MI.getDesc();
1467 // Handle jump tables.
1468 if (TID.Opcode == ARM::BR_JTr || TID.Opcode == ARM::BR_JTadd) {
1469 // First emit a ldr pc, [] instruction.
1470 emitDataProcessingInstruction(MI, ARM::PC);
1472 // Then emit the inline jump table.
1474 (TID.Opcode == ARM::BR_JTr)
1475 ? MI.getOperand(1).getIndex() : MI.getOperand(2).getIndex();
1476 emitInlineJumpTable(JTIndex);
1478 } else if (TID.Opcode == ARM::BR_JTm) {
1479 // First emit a ldr pc, [] instruction.
1480 emitLoadStoreInstruction(MI, ARM::PC);
1482 // Then emit the inline jump table.
1483 emitInlineJumpTable(MI.getOperand(3).getIndex());
1487 // Part of binary is determined by TableGn.
1488 unsigned Binary = getBinaryCodeForInstr(MI);
1490 // Set the conditional execution predicate
1491 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1493 if (TID.Opcode == ARM::BX_RET || TID.Opcode == ARM::MOVPCLR)
1494 // The return register is LR.
1495 Binary |= getARMRegisterNumbering(ARM::LR);
1497 // otherwise, set the return register
1498 Binary |= getMachineOpValue(MI, 0);
1503 static unsigned encodeVFPRd(const MachineInstr &MI, unsigned OpIdx) {
1504 unsigned RegD = MI.getOperand(OpIdx).getReg();
1505 unsigned Binary = 0;
1506 bool isSPVFP = ARM::SPRRegisterClass->contains(RegD);
1507 RegD = getARMRegisterNumbering(RegD);
1509 Binary |= (RegD & 0x0F) << ARMII::RegRdShift;
1510 Binary |= ((RegD & 0x10) >> 4) << ARMII::D_BitShift;
1512 Binary |= ((RegD & 0x1E) >> 1) << ARMII::RegRdShift;
1513 Binary |= (RegD & 0x01) << ARMII::D_BitShift;
1518 static unsigned encodeVFPRn(const MachineInstr &MI, unsigned OpIdx) {
1519 unsigned RegN = MI.getOperand(OpIdx).getReg();
1520 unsigned Binary = 0;
1521 bool isSPVFP = ARM::SPRRegisterClass->contains(RegN);
1522 RegN = getARMRegisterNumbering(RegN);
1524 Binary |= (RegN & 0x0F) << ARMII::RegRnShift;
1525 Binary |= ((RegN & 0x10) >> 4) << ARMII::N_BitShift;
1527 Binary |= ((RegN & 0x1E) >> 1) << ARMII::RegRnShift;
1528 Binary |= (RegN & 0x01) << ARMII::N_BitShift;
1533 static unsigned encodeVFPRm(const MachineInstr &MI, unsigned OpIdx) {
1534 unsigned RegM = MI.getOperand(OpIdx).getReg();
1535 unsigned Binary = 0;
1536 bool isSPVFP = ARM::SPRRegisterClass->contains(RegM);
1537 RegM = getARMRegisterNumbering(RegM);
1539 Binary |= (RegM & 0x0F);
1540 Binary |= ((RegM & 0x10) >> 4) << ARMII::M_BitShift;
1542 Binary |= ((RegM & 0x1E) >> 1);
1543 Binary |= (RegM & 0x01) << ARMII::M_BitShift;
1548 void ARMCodeEmitter::emitVFPArithInstruction(const MachineInstr &MI) {
1549 const TargetInstrDesc &TID = MI.getDesc();
1551 // Part of binary is determined by TableGn.
1552 unsigned Binary = getBinaryCodeForInstr(MI);
1554 // Set the conditional execution predicate
1555 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1558 assert((Binary & ARMII::D_BitShift) == 0 &&
1559 (Binary & ARMII::N_BitShift) == 0 &&
1560 (Binary & ARMII::M_BitShift) == 0 && "VFP encoding bug!");
1563 Binary |= encodeVFPRd(MI, OpIdx++);
1565 // If this is a two-address operand, skip it, e.g. FMACD.
1566 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1570 if ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPBinaryFrm)
1571 Binary |= encodeVFPRn(MI, OpIdx++);
1573 if (OpIdx == TID.getNumOperands() ||
1574 TID.OpInfo[OpIdx].isPredicate() ||
1575 TID.OpInfo[OpIdx].isOptionalDef()) {
1576 // FCMPEZD etc. has only one operand.
1582 Binary |= encodeVFPRm(MI, OpIdx);
1587 void ARMCodeEmitter::emitVFPConversionInstruction(const MachineInstr &MI) {
1588 const TargetInstrDesc &TID = MI.getDesc();
1589 unsigned Form = TID.TSFlags & ARMII::FormMask;
1591 // Part of binary is determined by TableGn.
1592 unsigned Binary = getBinaryCodeForInstr(MI);
1594 // Set the conditional execution predicate
1595 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1599 case ARMII::VFPConv1Frm:
1600 case ARMII::VFPConv2Frm:
1601 case ARMII::VFPConv3Frm:
1603 Binary |= encodeVFPRd(MI, 0);
1605 case ARMII::VFPConv4Frm:
1607 Binary |= encodeVFPRn(MI, 0);
1609 case ARMII::VFPConv5Frm:
1611 Binary |= encodeVFPRm(MI, 0);
1617 case ARMII::VFPConv1Frm:
1619 Binary |= encodeVFPRm(MI, 1);
1621 case ARMII::VFPConv2Frm:
1622 case ARMII::VFPConv3Frm:
1624 Binary |= encodeVFPRn(MI, 1);
1626 case ARMII::VFPConv4Frm:
1627 case ARMII::VFPConv5Frm:
1629 Binary |= encodeVFPRd(MI, 1);
1633 if (Form == ARMII::VFPConv5Frm)
1635 Binary |= encodeVFPRn(MI, 2);
1636 else if (Form == ARMII::VFPConv3Frm)
1638 Binary |= encodeVFPRm(MI, 2);
1643 void ARMCodeEmitter::emitVFPLoadStoreInstruction(const MachineInstr &MI) {
1644 // Part of binary is determined by TableGn.
1645 unsigned Binary = getBinaryCodeForInstr(MI);
1647 // Set the conditional execution predicate
1648 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1653 Binary |= encodeVFPRd(MI, OpIdx++);
1655 // Encode address base.
1656 const MachineOperand &Base = MI.getOperand(OpIdx++);
1657 Binary |= getMachineOpValue(MI, Base) << ARMII::RegRnShift;
1659 // If there is a non-zero immediate offset, encode it.
1661 const MachineOperand &Offset = MI.getOperand(OpIdx);
1662 if (unsigned ImmOffs = ARM_AM::getAM5Offset(Offset.getImm())) {
1663 if (ARM_AM::getAM5Op(Offset.getImm()) == ARM_AM::add)
1664 Binary |= 1 << ARMII::U_BitShift;
1671 // If immediate offset is omitted, default to +0.
1672 Binary |= 1 << ARMII::U_BitShift;
1678 ARMCodeEmitter::emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI) {
1679 const TargetInstrDesc &TID = MI.getDesc();
1680 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1682 // Part of binary is determined by TableGn.
1683 unsigned Binary = getBinaryCodeForInstr(MI);
1685 // Set the conditional execution predicate
1686 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1688 // Skip operand 0 of an instruction with base register update.
1693 // Set base address operand
1694 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1696 // Set addressing mode by modifying bits U(23) and P(24)
1697 const MachineOperand &MO = MI.getOperand(OpIdx++);
1698 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(MO.getImm()));
1702 Binary |= 0x1 << ARMII::W_BitShift;
1704 // First register is encoded in Dd.
1705 Binary |= encodeVFPRd(MI, OpIdx+2);
1707 // Count the number of registers.
1708 unsigned NumRegs = 1;
1709 for (unsigned i = OpIdx+3, e = MI.getNumOperands(); i != e; ++i) {
1710 const MachineOperand &MO = MI.getOperand(i);
1711 if (!MO.isReg() || MO.isImplicit())
1715 // Bit 8 will be set if <list> is consecutive 64-bit registers (e.g., D0)
1716 // Otherwise, it will be 0, in the case of 32-bit registers.
1718 Binary |= NumRegs * 2;
1725 static unsigned encodeNEONRd(const MachineInstr &MI, unsigned OpIdx) {
1726 unsigned RegD = MI.getOperand(OpIdx).getReg();
1727 unsigned Binary = 0;
1728 RegD = getARMRegisterNumbering(RegD);
1729 Binary |= (RegD & 0xf) << ARMII::RegRdShift;
1730 Binary |= ((RegD >> 4) & 1) << ARMII::D_BitShift;
1734 static unsigned encodeNEONRn(const MachineInstr &MI, unsigned OpIdx) {
1735 unsigned RegN = MI.getOperand(OpIdx).getReg();
1736 unsigned Binary = 0;
1737 RegN = getARMRegisterNumbering(RegN);
1738 Binary |= (RegN & 0xf) << ARMII::RegRnShift;
1739 Binary |= ((RegN >> 4) & 1) << ARMII::N_BitShift;
1743 static unsigned encodeNEONRm(const MachineInstr &MI, unsigned OpIdx) {
1744 unsigned RegM = MI.getOperand(OpIdx).getReg();
1745 unsigned Binary = 0;
1746 RegM = getARMRegisterNumbering(RegM);
1747 Binary |= (RegM & 0xf);
1748 Binary |= ((RegM >> 4) & 1) << ARMII::M_BitShift;
1752 /// convertNEONDataProcToThumb - Convert the ARM mode encoding for a NEON
1753 /// data-processing instruction to the corresponding Thumb encoding.
1754 static unsigned convertNEONDataProcToThumb(unsigned Binary) {
1755 assert((Binary & 0xfe000000) == 0xf2000000 &&
1756 "not an ARM NEON data-processing instruction");
1757 unsigned UBit = (Binary >> 24) & 1;
1758 return 0xef000000 | (UBit << 28) | (Binary & 0xffffff);
1761 void ARMCodeEmitter::emitNEONLaneInstruction(const MachineInstr &MI) {
1762 unsigned Binary = getBinaryCodeForInstr(MI);
1764 unsigned RegTOpIdx, RegNOpIdx, LnOpIdx;
1765 const TargetInstrDesc &TID = MI.getDesc();
1766 if ((TID.TSFlags & ARMII::FormMask) == ARMII::NGetLnFrm) {
1770 } else { // ARMII::NSetLnFrm
1776 // Set the conditional execution predicate
1777 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1779 unsigned RegT = MI.getOperand(RegTOpIdx).getReg();
1780 RegT = getARMRegisterNumbering(RegT);
1781 Binary |= (RegT << ARMII::RegRdShift);
1782 Binary |= encodeNEONRn(MI, RegNOpIdx);
1785 if ((Binary & (1 << 22)) != 0)
1786 LaneShift = 0; // 8-bit elements
1787 else if ((Binary & (1 << 5)) != 0)
1788 LaneShift = 1; // 16-bit elements
1790 LaneShift = 2; // 32-bit elements
1792 unsigned Lane = MI.getOperand(LnOpIdx).getImm() << LaneShift;
1793 unsigned Opc1 = Lane >> 2;
1794 unsigned Opc2 = Lane & 3;
1795 assert((Opc1 & 3) == 0 && "out-of-range lane number operand");
1796 Binary |= (Opc1 << 21);
1797 Binary |= (Opc2 << 5);
1802 void ARMCodeEmitter::emitNEONDupInstruction(const MachineInstr &MI) {
1803 unsigned Binary = getBinaryCodeForInstr(MI);
1805 // Set the conditional execution predicate
1806 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1808 unsigned RegT = MI.getOperand(1).getReg();
1809 RegT = getARMRegisterNumbering(RegT);
1810 Binary |= (RegT << ARMII::RegRdShift);
1811 Binary |= encodeNEONRn(MI, 0);
1815 void ARMCodeEmitter::emitNEON1RegModImmInstruction(const MachineInstr &MI) {
1816 unsigned Binary = getBinaryCodeForInstr(MI);
1817 // Destination register is encoded in Dd.
1818 Binary |= encodeNEONRd(MI, 0);
1819 // Immediate fields: Op, Cmode, I, Imm3, Imm4
1820 unsigned Imm = MI.getOperand(1).getImm();
1821 unsigned Op = (Imm >> 12) & 1;
1822 unsigned Cmode = (Imm >> 8) & 0xf;
1823 unsigned I = (Imm >> 7) & 1;
1824 unsigned Imm3 = (Imm >> 4) & 0x7;
1825 unsigned Imm4 = Imm & 0xf;
1826 Binary |= (I << 24) | (Imm3 << 16) | (Cmode << 8) | (Op << 5) | Imm4;
1828 Binary = convertNEONDataProcToThumb(Binary);
1832 void ARMCodeEmitter::emitNEON2RegInstruction(const MachineInstr &MI) {
1833 const TargetInstrDesc &TID = MI.getDesc();
1834 unsigned Binary = getBinaryCodeForInstr(MI);
1835 // Destination register is encoded in Dd; source register in Dm.
1837 Binary |= encodeNEONRd(MI, OpIdx++);
1838 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1840 Binary |= encodeNEONRm(MI, OpIdx);
1842 Binary = convertNEONDataProcToThumb(Binary);
1843 // FIXME: This does not handle VDUPfdf or VDUPfqf.
1847 void ARMCodeEmitter::emitNEON3RegInstruction(const MachineInstr &MI) {
1848 const TargetInstrDesc &TID = MI.getDesc();
1849 unsigned Binary = getBinaryCodeForInstr(MI);
1850 // Destination register is encoded in Dd; source registers in Dn and Dm.
1852 Binary |= encodeNEONRd(MI, OpIdx++);
1853 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1855 Binary |= encodeNEONRn(MI, OpIdx++);
1856 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1858 Binary |= encodeNEONRm(MI, OpIdx);
1860 Binary = convertNEONDataProcToThumb(Binary);
1861 // FIXME: This does not handle VMOVDneon or VMOVQ.
1865 #include "ARMGenCodeEmitter.inc"