1 //===-- ARM/ARMCodeEmitter.cpp - Convert ARM code to machine code ---------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the pass that transforms the ARM machine instructions into
11 // relocatable machine code.
13 //===----------------------------------------------------------------------===//
15 #define DEBUG_TYPE "jit"
17 #include "ARMAddressingModes.h"
18 #include "ARMConstantPoolValue.h"
19 #include "ARMInstrInfo.h"
20 #include "ARMRelocations.h"
21 #include "ARMSubtarget.h"
22 #include "ARMTargetMachine.h"
23 #include "llvm/Constants.h"
24 #include "llvm/DerivedTypes.h"
25 #include "llvm/Function.h"
26 #include "llvm/PassManager.h"
27 #include "llvm/CodeGen/JITCodeEmitter.h"
28 #include "llvm/CodeGen/MachineConstantPool.h"
29 #include "llvm/CodeGen/MachineFunctionPass.h"
30 #include "llvm/CodeGen/MachineInstr.h"
31 #include "llvm/CodeGen/MachineJumpTableInfo.h"
32 #include "llvm/CodeGen/MachineModuleInfo.h"
33 #include "llvm/CodeGen/Passes.h"
34 #include "llvm/ADT/Statistic.h"
35 #include "llvm/Support/Debug.h"
36 #include "llvm/Support/ErrorHandling.h"
37 #include "llvm/Support/raw_ostream.h"
43 STATISTIC(NumEmitted, "Number of machine instructions emitted");
47 class ARMCodeEmitter : public MachineFunctionPass {
49 const ARMInstrInfo *II;
51 const ARMSubtarget *Subtarget;
54 MachineModuleInfo *MMI;
55 const std::vector<MachineConstantPoolEntry> *MCPEs;
56 const std::vector<MachineJumpTableEntry> *MJTEs;
60 void getAnalysisUsage(AnalysisUsage &AU) const {
61 AU.addRequired<MachineModuleInfo>();
62 MachineFunctionPass::getAnalysisUsage(AU);
67 ARMCodeEmitter(TargetMachine &tm, JITCodeEmitter &mce)
68 : MachineFunctionPass(ID), JTI(0),
69 II((const ARMInstrInfo *)tm.getInstrInfo()),
70 TD(tm.getTargetData()), TM(tm),
71 MCE(mce), MCPEs(0), MJTEs(0),
72 IsPIC(TM.getRelocationModel() == Reloc::PIC_), IsThumb(false) {}
74 /// getBinaryCodeForInstr - This function, generated by the
75 /// CodeEmitterGenerator using TableGen, produces the binary encoding for
76 /// machine instructions.
77 unsigned getBinaryCodeForInstr(const MachineInstr &MI) const;
79 bool runOnMachineFunction(MachineFunction &MF);
81 virtual const char *getPassName() const {
82 return "ARM Machine Code Emitter";
85 void emitInstruction(const MachineInstr &MI);
89 void emitWordLE(unsigned Binary);
90 void emitDWordLE(uint64_t Binary);
91 void emitConstPoolInstruction(const MachineInstr &MI);
92 void emitMOVi32immInstruction(const MachineInstr &MI);
93 void emitMOVi2piecesInstruction(const MachineInstr &MI);
94 void emitLEApcrelJTInstruction(const MachineInstr &MI);
95 void emitPseudoMoveInstruction(const MachineInstr &MI);
96 void addPCLabel(unsigned LabelID);
97 void emitPseudoInstruction(const MachineInstr &MI);
98 unsigned getMachineSoRegOpValue(const MachineInstr &MI,
99 const TargetInstrDesc &TID,
100 const MachineOperand &MO,
103 unsigned getMachineSoImmOpValue(unsigned SoImm);
104 unsigned getAddrModeSBit(const MachineInstr &MI,
105 const TargetInstrDesc &TID) const;
107 void emitDataProcessingInstruction(const MachineInstr &MI,
108 unsigned ImplicitRd = 0,
109 unsigned ImplicitRn = 0);
111 void emitLoadStoreInstruction(const MachineInstr &MI,
112 unsigned ImplicitRd = 0,
113 unsigned ImplicitRn = 0);
115 void emitMiscLoadStoreInstruction(const MachineInstr &MI,
116 unsigned ImplicitRn = 0);
118 void emitLoadStoreMultipleInstruction(const MachineInstr &MI);
120 void emitMulFrmInstruction(const MachineInstr &MI);
122 void emitExtendInstruction(const MachineInstr &MI);
124 void emitMiscArithInstruction(const MachineInstr &MI);
126 void emitSaturateInstruction(const MachineInstr &MI);
128 void emitBranchInstruction(const MachineInstr &MI);
130 void emitInlineJumpTable(unsigned JTIndex);
132 void emitMiscBranchInstruction(const MachineInstr &MI);
134 void emitVFPArithInstruction(const MachineInstr &MI);
136 void emitVFPConversionInstruction(const MachineInstr &MI);
138 void emitVFPLoadStoreInstruction(const MachineInstr &MI);
140 void emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI);
142 void emitNEONLaneInstruction(const MachineInstr &MI);
143 void emitNEONDupInstruction(const MachineInstr &MI);
144 void emitNEON1RegModImmInstruction(const MachineInstr &MI);
145 void emitNEON2RegInstruction(const MachineInstr &MI);
146 void emitNEON3RegInstruction(const MachineInstr &MI);
148 /// getMachineOpValue - Return binary encoding of operand. If the machine
149 /// operand requires relocation, record the relocation and return zero.
150 unsigned getMachineOpValue(const MachineInstr &MI,
151 const MachineOperand &MO) const;
152 unsigned getMachineOpValue(const MachineInstr &MI, unsigned OpIdx) const {
153 return getMachineOpValue(MI, MI.getOperand(OpIdx));
156 // FIXME: The legacy JIT ARMCodeEmitter doesn't rely on the the
157 // TableGen'erated getBinaryCodeForInstr() function to encode any
158 // operand values, instead querying getMachineOpValue() directly for
159 // each operand it needs to encode. Thus, any of the new encoder
160 // helper functions can simply return 0 as the values the return
161 // are already handled elsewhere. They are placeholders to allow this
162 // encoder to continue to function until the MC encoder is sufficiently
163 // far along that this one can be eliminated entirely.
164 unsigned NEONThumb2DataIPostEncoder(const MachineInstr &MI, unsigned Val)
166 unsigned NEONThumb2LoadStorePostEncoder(const MachineInstr &MI,unsigned Val)
168 unsigned NEONThumb2DupPostEncoder(const MachineInstr &MI,unsigned Val)
170 unsigned getBranchTargetOpValue(const MachineInstr &MI, unsigned Op)
172 unsigned getCCOutOpValue(const MachineInstr &MI, unsigned Op)
174 unsigned getSOImmOpValue(const MachineInstr &MI, unsigned Op)
176 unsigned getT2SOImmOpValue(const MachineInstr &MI, unsigned Op)
178 unsigned getSORegOpValue(const MachineInstr &MI, unsigned Op)
180 unsigned getT2AddrModeImm12OpValue(const MachineInstr &MI, unsigned Op)
182 unsigned getT2AddrModeImm8OpValue(const MachineInstr &MI, unsigned Op)
184 unsigned getT2AddrModeImm8s4OpValue(const MachineInstr &MI, unsigned Op)
186 unsigned getT2AddrModeImm8OffsetOpValue(const MachineInstr &MI, unsigned Op)
188 unsigned getT2AddrModeImm12OffsetOpValue(const MachineInstr &MI,unsigned Op)
190 unsigned getT2AddrModeSORegOpValue(const MachineInstr &MI, unsigned Op)
192 unsigned getT2SORegOpValue(const MachineInstr &MI, unsigned Op)
194 unsigned getRotImmOpValue(const MachineInstr &MI, unsigned Op)
196 unsigned getImmMinusOneOpValue(const MachineInstr &MI, unsigned Op)
198 unsigned getAddrMode6AddressOpValue(const MachineInstr &MI, unsigned Op)
200 unsigned getAddrMode6DupAddressOpValue(const MachineInstr &MI, unsigned Op)
202 unsigned getAddrMode6OffsetOpValue(const MachineInstr &MI, unsigned Op)
204 unsigned getBitfieldInvertedMaskOpValue(const MachineInstr &MI,
205 unsigned Op) const { return 0; }
206 uint32_t getLdStmModeOpValue(const MachineInstr &MI, unsigned OpIdx)
208 uint32_t getLdStSORegOpValue(const MachineInstr &MI, unsigned OpIdx)
211 unsigned getAddrModeImm12OpValue(const MachineInstr &MI, unsigned Op)
214 // {12} = (U)nsigned (add == '1', sub == '0')
216 const MachineOperand &MO = MI.getOperand(Op);
217 const MachineOperand &MO1 = MI.getOperand(Op + 1);
219 emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry);
222 unsigned Reg = getARMRegisterNumbering(MO.getReg());
223 int32_t Imm12 = MO1.getImm();
225 Binary = Imm12 & 0xfff;
228 Binary |= (Reg << 13);
232 unsigned getMovtImmOpValue(const MachineInstr &MI, unsigned Op) const {
236 uint32_t getAddrMode2OpValue(const MachineInstr &MI, unsigned OpIdx)
238 uint32_t getAddrMode2OffsetOpValue(const MachineInstr &MI, unsigned OpIdx)
240 uint32_t getAddrMode3OffsetOpValue(const MachineInstr &MI, unsigned OpIdx)
242 uint32_t getAddrMode3OpValue(const MachineInstr &MI, unsigned Op)
244 uint32_t getAddrModeS4OpValue(const MachineInstr &MI, unsigned Op)
246 uint32_t getAddrModeS2OpValue(const MachineInstr &MI, unsigned Op)
248 uint32_t getAddrModeS1OpValue(const MachineInstr &MI, unsigned Op)
250 uint32_t getAddrMode5OpValue(const MachineInstr &MI, unsigned Op) const {
252 // {12} = (U)nsigned (add == '1', sub == '0')
254 const MachineOperand &MO = MI.getOperand(Op);
255 const MachineOperand &MO1 = MI.getOperand(Op + 1);
257 emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry);
260 unsigned Reg = getARMRegisterNumbering(MO.getReg());
261 int32_t Imm12 = MO1.getImm();
263 // Special value for #-0
264 if (Imm12 == INT32_MIN)
267 // Immediate is always encoded as positive. The 'U' bit controls add vs
275 uint32_t Binary = Imm12 & 0xfff;
278 Binary |= (Reg << 13);
281 unsigned getNEONVcvtImm32OpValue(const MachineInstr &MI, unsigned Op)
284 unsigned getRegisterListOpValue(const MachineInstr &MI, unsigned Op)
287 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
288 /// machine operand requires relocation, record the relocation and return
290 unsigned getMovi32Value(const MachineInstr &MI,const MachineOperand &MO,
293 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
295 unsigned getShiftOp(unsigned Imm) const ;
297 /// Routines that handle operands which add machine relocations which are
298 /// fixed up by the relocation stage.
299 void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
300 bool MayNeedFarStub, bool Indirect,
301 intptr_t ACPV = 0) const;
302 void emitExternalSymbolAddress(const char *ES, unsigned Reloc) const;
303 void emitConstPoolAddress(unsigned CPI, unsigned Reloc) const;
304 void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const;
305 void emitMachineBasicBlock(MachineBasicBlock *BB, unsigned Reloc,
306 intptr_t JTBase = 0) const;
310 char ARMCodeEmitter::ID = 0;
312 /// createARMJITCodeEmitterPass - Return a pass that emits the collected ARM
313 /// code to the specified MCE object.
314 FunctionPass *llvm::createARMJITCodeEmitterPass(ARMBaseTargetMachine &TM,
315 JITCodeEmitter &JCE) {
316 return new ARMCodeEmitter(TM, JCE);
319 bool ARMCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
320 assert((MF.getTarget().getRelocationModel() != Reloc::Default ||
321 MF.getTarget().getRelocationModel() != Reloc::Static) &&
322 "JIT relocation model must be set to static or default!");
323 JTI = ((ARMTargetMachine &)MF.getTarget()).getJITInfo();
324 II = ((const ARMTargetMachine &)MF.getTarget()).getInstrInfo();
325 TD = ((const ARMTargetMachine &)MF.getTarget()).getTargetData();
326 Subtarget = &TM.getSubtarget<ARMSubtarget>();
327 MCPEs = &MF.getConstantPool()->getConstants();
329 if (MF.getJumpTableInfo()) MJTEs = &MF.getJumpTableInfo()->getJumpTables();
330 IsPIC = TM.getRelocationModel() == Reloc::PIC_;
331 IsThumb = MF.getInfo<ARMFunctionInfo>()->isThumbFunction();
332 JTI->Initialize(MF, IsPIC);
333 MMI = &getAnalysis<MachineModuleInfo>();
334 MCE.setModuleInfo(MMI);
337 DEBUG(errs() << "JITTing function '"
338 << MF.getFunction()->getName() << "'\n");
339 MCE.startFunction(MF);
340 for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
342 MCE.StartMachineBasicBlock(MBB);
343 for (MachineBasicBlock::const_iterator I = MBB->begin(), E = MBB->end();
347 } while (MCE.finishFunction(MF));
352 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
354 unsigned ARMCodeEmitter::getShiftOp(unsigned Imm) const {
355 switch (ARM_AM::getAM2ShiftOpc(Imm)) {
356 default: llvm_unreachable("Unknown shift opc!");
357 case ARM_AM::asr: return 2;
358 case ARM_AM::lsl: return 0;
359 case ARM_AM::lsr: return 1;
361 case ARM_AM::rrx: return 3;
366 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
367 /// machine operand requires relocation, record the relocation and return zero.
368 unsigned ARMCodeEmitter::getMovi32Value(const MachineInstr &MI,
369 const MachineOperand &MO,
371 assert(((Reloc == ARM::reloc_arm_movt) || (Reloc == ARM::reloc_arm_movw))
372 && "Relocation to this function should be for movt or movw");
375 return static_cast<unsigned>(MO.getImm());
376 else if (MO.isGlobal())
377 emitGlobalAddress(MO.getGlobal(), Reloc, true, false);
378 else if (MO.isSymbol())
379 emitExternalSymbolAddress(MO.getSymbolName(), Reloc);
381 emitMachineBasicBlock(MO.getMBB(), Reloc);
386 llvm_unreachable("Unsupported operand type for movw/movt");
391 /// getMachineOpValue - Return binary encoding of operand. If the machine
392 /// operand requires relocation, record the relocation and return zero.
393 unsigned ARMCodeEmitter::getMachineOpValue(const MachineInstr &MI,
394 const MachineOperand &MO) const {
396 return getARMRegisterNumbering(MO.getReg());
398 return static_cast<unsigned>(MO.getImm());
399 else if (MO.isGlobal())
400 emitGlobalAddress(MO.getGlobal(), ARM::reloc_arm_branch, true, false);
401 else if (MO.isSymbol())
402 emitExternalSymbolAddress(MO.getSymbolName(), ARM::reloc_arm_branch);
403 else if (MO.isCPI()) {
404 const TargetInstrDesc &TID = MI.getDesc();
405 // For VFP load, the immediate offset is multiplied by 4.
406 unsigned Reloc = ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPLdStFrm)
407 ? ARM::reloc_arm_vfp_cp_entry : ARM::reloc_arm_cp_entry;
408 emitConstPoolAddress(MO.getIndex(), Reloc);
409 } else if (MO.isJTI())
410 emitJumpTableAddress(MO.getIndex(), ARM::reloc_arm_relative);
412 emitMachineBasicBlock(MO.getMBB(), ARM::reloc_arm_branch);
414 llvm_unreachable("Unable to encode MachineOperand!");
418 /// emitGlobalAddress - Emit the specified address to the code stream.
420 void ARMCodeEmitter::emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
421 bool MayNeedFarStub, bool Indirect,
422 intptr_t ACPV) const {
423 MachineRelocation MR = Indirect
424 ? MachineRelocation::getIndirectSymbol(MCE.getCurrentPCOffset(), Reloc,
425 const_cast<GlobalValue *>(GV),
426 ACPV, MayNeedFarStub)
427 : MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc,
428 const_cast<GlobalValue *>(GV), ACPV,
430 MCE.addRelocation(MR);
433 /// emitExternalSymbolAddress - Arrange for the address of an external symbol to
434 /// be emitted to the current location in the function, and allow it to be PC
436 void ARMCodeEmitter::
437 emitExternalSymbolAddress(const char *ES, unsigned Reloc) const {
438 MCE.addRelocation(MachineRelocation::getExtSym(MCE.getCurrentPCOffset(),
442 /// emitConstPoolAddress - Arrange for the address of an constant pool
443 /// to be emitted to the current location in the function, and allow it to be PC
445 void ARMCodeEmitter::emitConstPoolAddress(unsigned CPI, unsigned Reloc) const {
446 // Tell JIT emitter we'll resolve the address.
447 MCE.addRelocation(MachineRelocation::getConstPool(MCE.getCurrentPCOffset(),
448 Reloc, CPI, 0, true));
451 /// emitJumpTableAddress - Arrange for the address of a jump table to
452 /// be emitted to the current location in the function, and allow it to be PC
454 void ARMCodeEmitter::
455 emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const {
456 MCE.addRelocation(MachineRelocation::getJumpTable(MCE.getCurrentPCOffset(),
457 Reloc, JTIndex, 0, true));
460 /// emitMachineBasicBlock - Emit the specified address basic block.
461 void ARMCodeEmitter::emitMachineBasicBlock(MachineBasicBlock *BB,
463 intptr_t JTBase) const {
464 MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(),
468 void ARMCodeEmitter::emitWordLE(unsigned Binary) {
469 DEBUG(errs() << " 0x";
470 errs().write_hex(Binary) << "\n");
471 MCE.emitWordLE(Binary);
474 void ARMCodeEmitter::emitDWordLE(uint64_t Binary) {
475 DEBUG(errs() << " 0x";
476 errs().write_hex(Binary) << "\n");
477 MCE.emitDWordLE(Binary);
480 void ARMCodeEmitter::emitInstruction(const MachineInstr &MI) {
481 DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << MI);
483 MCE.processDebugLoc(MI.getDebugLoc(), true);
485 ++NumEmitted; // Keep track of the # of mi's emitted
486 switch (MI.getDesc().TSFlags & ARMII::FormMask) {
488 llvm_unreachable("Unhandled instruction encoding format!");
492 if (MI.getOpcode() == ARM::LEApcrelJT) {
493 // Materialize jumptable address.
494 emitLEApcrelJTInstruction(MI);
497 llvm_unreachable("Unhandled instruction encoding!");
500 emitPseudoInstruction(MI);
503 case ARMII::DPSoRegFrm:
504 emitDataProcessingInstruction(MI);
508 emitLoadStoreInstruction(MI);
510 case ARMII::LdMiscFrm:
511 case ARMII::StMiscFrm:
512 emitMiscLoadStoreInstruction(MI);
514 case ARMII::LdStMulFrm:
515 emitLoadStoreMultipleInstruction(MI);
518 emitMulFrmInstruction(MI);
521 emitExtendInstruction(MI);
523 case ARMII::ArithMiscFrm:
524 emitMiscArithInstruction(MI);
527 emitSaturateInstruction(MI);
530 emitBranchInstruction(MI);
532 case ARMII::BrMiscFrm:
533 emitMiscBranchInstruction(MI);
536 case ARMII::VFPUnaryFrm:
537 case ARMII::VFPBinaryFrm:
538 emitVFPArithInstruction(MI);
540 case ARMII::VFPConv1Frm:
541 case ARMII::VFPConv2Frm:
542 case ARMII::VFPConv3Frm:
543 case ARMII::VFPConv4Frm:
544 case ARMII::VFPConv5Frm:
545 emitVFPConversionInstruction(MI);
547 case ARMII::VFPLdStFrm:
548 emitVFPLoadStoreInstruction(MI);
550 case ARMII::VFPLdStMulFrm:
551 emitVFPLoadStoreMultipleInstruction(MI);
554 // NEON instructions.
555 case ARMII::NGetLnFrm:
556 case ARMII::NSetLnFrm:
557 emitNEONLaneInstruction(MI);
560 emitNEONDupInstruction(MI);
562 case ARMII::N1RegModImmFrm:
563 emitNEON1RegModImmInstruction(MI);
565 case ARMII::N2RegFrm:
566 emitNEON2RegInstruction(MI);
568 case ARMII::N3RegFrm:
569 emitNEON3RegInstruction(MI);
572 MCE.processDebugLoc(MI.getDebugLoc(), false);
575 void ARMCodeEmitter::emitConstPoolInstruction(const MachineInstr &MI) {
576 unsigned CPI = MI.getOperand(0).getImm(); // CP instruction index.
577 unsigned CPIndex = MI.getOperand(1).getIndex(); // Actual cp entry index.
578 const MachineConstantPoolEntry &MCPE = (*MCPEs)[CPIndex];
580 // Remember the CONSTPOOL_ENTRY address for later relocation.
581 JTI->addConstantPoolEntryAddr(CPI, MCE.getCurrentPCValue());
583 // Emit constpool island entry. In most cases, the actual values will be
584 // resolved and relocated after code emission.
585 if (MCPE.isMachineConstantPoolEntry()) {
586 ARMConstantPoolValue *ACPV =
587 static_cast<ARMConstantPoolValue*>(MCPE.Val.MachineCPVal);
589 DEBUG(errs() << " ** ARM constant pool #" << CPI << " @ "
590 << (void*)MCE.getCurrentPCValue() << " " << *ACPV << '\n');
592 assert(ACPV->isGlobalValue() && "unsupported constant pool value");
593 const GlobalValue *GV = ACPV->getGV();
595 Reloc::Model RelocM = TM.getRelocationModel();
596 emitGlobalAddress(GV, ARM::reloc_arm_machine_cp_entry,
598 Subtarget->GVIsIndirectSymbol(GV, RelocM),
601 emitExternalSymbolAddress(ACPV->getSymbol(), ARM::reloc_arm_absolute);
605 const Constant *CV = MCPE.Val.ConstVal;
608 errs() << " ** Constant pool #" << CPI << " @ "
609 << (void*)MCE.getCurrentPCValue() << " ";
610 if (const Function *F = dyn_cast<Function>(CV))
611 errs() << F->getName();
617 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
618 emitGlobalAddress(GV, ARM::reloc_arm_absolute, isa<Function>(GV), false);
620 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
621 uint32_t Val = uint32_t(*CI->getValue().getRawData());
623 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
624 if (CFP->getType()->isFloatTy())
625 emitWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
626 else if (CFP->getType()->isDoubleTy())
627 emitDWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
629 llvm_unreachable("Unable to handle this constantpool entry!");
632 llvm_unreachable("Unable to handle this constantpool entry!");
637 void ARMCodeEmitter::emitMOVi32immInstruction(const MachineInstr &MI) {
638 const MachineOperand &MO0 = MI.getOperand(0);
639 const MachineOperand &MO1 = MI.getOperand(1);
641 // Emit the 'movw' instruction.
642 unsigned Binary = 0x30 << 20; // mov: Insts{27-20} = 0b00110000
644 unsigned Lo16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movw) & 0xFFFF;
646 // Set the conditional execution predicate.
647 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
650 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
652 // Encode imm16 as imm4:imm12
653 Binary |= Lo16 & 0xFFF; // Insts{11-0} = imm12
654 Binary |= ((Lo16 >> 12) & 0xF) << 16; // Insts{19-16} = imm4
657 unsigned Hi16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movt) >> 16;
658 // Emit the 'movt' instruction.
659 Binary = 0x34 << 20; // movt: Insts{27-20} = 0b00110100
661 // Set the conditional execution predicate.
662 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
665 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
667 // Encode imm16 as imm4:imm1, same as movw above.
668 Binary |= Hi16 & 0xFFF;
669 Binary |= ((Hi16 >> 12) & 0xF) << 16;
673 void ARMCodeEmitter::emitMOVi2piecesInstruction(const MachineInstr &MI) {
674 const MachineOperand &MO0 = MI.getOperand(0);
675 const MachineOperand &MO1 = MI.getOperand(1);
676 assert(MO1.isImm() && ARM_AM::isSOImmTwoPartVal(MO1.getImm()) &&
677 "Not a valid so_imm value!");
678 unsigned V1 = ARM_AM::getSOImmTwoPartFirst(MO1.getImm());
679 unsigned V2 = ARM_AM::getSOImmTwoPartSecond(MO1.getImm());
681 // Emit the 'mov' instruction.
682 unsigned Binary = 0xd << 21; // mov: Insts{24-21} = 0b1101
684 // Set the conditional execution predicate.
685 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
688 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
691 // Set bit I(25) to identify this is the immediate form of <shifter_op>
692 Binary |= 1 << ARMII::I_BitShift;
693 Binary |= getMachineSoImmOpValue(V1);
696 // Now the 'orr' instruction.
697 Binary = 0xc << 21; // orr: Insts{24-21} = 0b1100
699 // Set the conditional execution predicate.
700 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
703 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
706 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRnShift;
709 // Set bit I(25) to identify this is the immediate form of <shifter_op>
710 Binary |= 1 << ARMII::I_BitShift;
711 Binary |= getMachineSoImmOpValue(V2);
715 void ARMCodeEmitter::emitLEApcrelJTInstruction(const MachineInstr &MI) {
716 // It's basically add r, pc, (LJTI - $+8)
718 const TargetInstrDesc &TID = MI.getDesc();
720 // Emit the 'add' instruction.
721 unsigned Binary = 0x4 << 21; // add: Insts{24-21} = 0b0100
723 // Set the conditional execution predicate
724 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
726 // Encode S bit if MI modifies CPSR.
727 Binary |= getAddrModeSBit(MI, TID);
730 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
732 // Encode Rn which is PC.
733 Binary |= getARMRegisterNumbering(ARM::PC) << ARMII::RegRnShift;
735 // Encode the displacement.
736 Binary |= 1 << ARMII::I_BitShift;
737 emitJumpTableAddress(MI.getOperand(1).getIndex(), ARM::reloc_arm_jt_base);
742 void ARMCodeEmitter::emitPseudoMoveInstruction(const MachineInstr &MI) {
743 unsigned Opcode = MI.getDesc().Opcode;
745 // Part of binary is determined by TableGn.
746 unsigned Binary = getBinaryCodeForInstr(MI);
748 // Set the conditional execution predicate
749 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
751 // Encode S bit if MI modifies CPSR.
752 if (Opcode == ARM::MOVsrl_flag || Opcode == ARM::MOVsra_flag)
753 Binary |= 1 << ARMII::S_BitShift;
755 // Encode register def if there is one.
756 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
758 // Encode the shift operation.
765 case ARM::MOVsrl_flag:
767 Binary |= (0x2 << 4) | (1 << 7);
769 case ARM::MOVsra_flag:
771 Binary |= (0x4 << 4) | (1 << 7);
775 // Encode register Rm.
776 Binary |= getMachineOpValue(MI, 1);
781 void ARMCodeEmitter::addPCLabel(unsigned LabelID) {
782 DEBUG(errs() << " ** LPC" << LabelID << " @ "
783 << (void*)MCE.getCurrentPCValue() << '\n');
784 JTI->addPCLabelAddr(LabelID, MCE.getCurrentPCValue());
787 void ARMCodeEmitter::emitPseudoInstruction(const MachineInstr &MI) {
788 unsigned Opcode = MI.getDesc().Opcode;
791 llvm_unreachable("ARMCodeEmitter::emitPseudoInstruction");
793 case ARM::BMOVPCRX_CALL:
795 case ARM::BMOVPCRXr9_CALL: {
796 // First emit mov lr, pc
797 unsigned Binary = 0x01a0e00f;
798 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
801 // and then emit the branch.
802 emitMiscBranchInstruction(MI);
805 case TargetOpcode::INLINEASM: {
806 // We allow inline assembler nodes with empty bodies - they can
807 // implicitly define registers, which is ok for JIT.
808 if (MI.getOperand(0).getSymbolName()[0]) {
809 report_fatal_error("JIT does not support inline asm!");
813 case TargetOpcode::PROLOG_LABEL:
814 case TargetOpcode::EH_LABEL:
815 MCE.emitLabel(MI.getOperand(0).getMCSymbol());
817 case TargetOpcode::IMPLICIT_DEF:
818 case TargetOpcode::KILL:
821 case ARM::CONSTPOOL_ENTRY:
822 emitConstPoolInstruction(MI);
825 // Remember of the address of the PC label for relocation later.
826 addPCLabel(MI.getOperand(2).getImm());
827 // PICADD is just an add instruction that implicitly read pc.
828 emitDataProcessingInstruction(MI, 0, ARM::PC);
835 // Remember of the address of the PC label for relocation later.
836 addPCLabel(MI.getOperand(2).getImm());
837 // These are just load / store instructions that implicitly read pc.
838 emitLoadStoreInstruction(MI, 0, ARM::PC);
845 // Remember of the address of the PC label for relocation later.
846 addPCLabel(MI.getOperand(2).getImm());
847 // These are just load / store instructions that implicitly read pc.
848 emitMiscLoadStoreInstruction(MI, ARM::PC);
853 // Two instructions to materialize a constant.
854 if (Subtarget->hasV6T2Ops())
855 emitMOVi32immInstruction(MI);
857 emitMOVi2piecesInstruction(MI);
860 case ARM::LEApcrelJT:
861 // Materialize jumptable address.
862 emitLEApcrelJTInstruction(MI);
865 case ARM::MOVsrl_flag:
866 case ARM::MOVsra_flag:
867 emitPseudoMoveInstruction(MI);
872 unsigned ARMCodeEmitter::getMachineSoRegOpValue(const MachineInstr &MI,
873 const TargetInstrDesc &TID,
874 const MachineOperand &MO,
876 unsigned Binary = getMachineOpValue(MI, MO);
878 const MachineOperand &MO1 = MI.getOperand(OpIdx + 1);
879 const MachineOperand &MO2 = MI.getOperand(OpIdx + 2);
880 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO2.getImm());
882 // Encode the shift opcode.
884 unsigned Rs = MO1.getReg();
886 // Set shift operand (bit[7:4]).
891 // RRX - 0110 and bit[11:8] clear.
893 default: llvm_unreachable("Unknown shift opc!");
894 case ARM_AM::lsl: SBits = 0x1; break;
895 case ARM_AM::lsr: SBits = 0x3; break;
896 case ARM_AM::asr: SBits = 0x5; break;
897 case ARM_AM::ror: SBits = 0x7; break;
898 case ARM_AM::rrx: SBits = 0x6; break;
901 // Set shift operand (bit[6:4]).
907 default: llvm_unreachable("Unknown shift opc!");
908 case ARM_AM::lsl: SBits = 0x0; break;
909 case ARM_AM::lsr: SBits = 0x2; break;
910 case ARM_AM::asr: SBits = 0x4; break;
911 case ARM_AM::ror: SBits = 0x6; break;
914 Binary |= SBits << 4;
915 if (SOpc == ARM_AM::rrx)
918 // Encode the shift operation Rs or shift_imm (except rrx).
920 // Encode Rs bit[11:8].
921 assert(ARM_AM::getSORegOffset(MO2.getImm()) == 0);
922 return Binary | (getARMRegisterNumbering(Rs) << ARMII::RegRsShift);
925 // Encode shift_imm bit[11:7].
926 return Binary | ARM_AM::getSORegOffset(MO2.getImm()) << 7;
929 unsigned ARMCodeEmitter::getMachineSoImmOpValue(unsigned SoImm) {
930 int SoImmVal = ARM_AM::getSOImmVal(SoImm);
931 assert(SoImmVal != -1 && "Not a valid so_imm value!");
933 // Encode rotate_imm.
934 unsigned Binary = (ARM_AM::getSOImmValRot((unsigned)SoImmVal) >> 1)
935 << ARMII::SoRotImmShift;
938 Binary |= ARM_AM::getSOImmValImm((unsigned)SoImmVal);
942 unsigned ARMCodeEmitter::getAddrModeSBit(const MachineInstr &MI,
943 const TargetInstrDesc &TID) const {
944 for (unsigned i = MI.getNumOperands(), e = TID.getNumOperands(); i != e; --i){
945 const MachineOperand &MO = MI.getOperand(i-1);
946 if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR)
947 return 1 << ARMII::S_BitShift;
952 void ARMCodeEmitter::emitDataProcessingInstruction(const MachineInstr &MI,
954 unsigned ImplicitRn) {
955 const TargetInstrDesc &TID = MI.getDesc();
957 // Part of binary is determined by TableGn.
958 unsigned Binary = getBinaryCodeForInstr(MI);
960 // Set the conditional execution predicate
961 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
963 // Encode S bit if MI modifies CPSR.
964 Binary |= getAddrModeSBit(MI, TID);
966 // Encode register def if there is one.
967 unsigned NumDefs = TID.getNumDefs();
970 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
972 // Special handling for implicit use (e.g. PC).
973 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
975 if (TID.Opcode == ARM::MOVi16) {
976 // Get immediate from MI.
977 unsigned Lo16 = getMovi32Value(MI, MI.getOperand(OpIdx),
978 ARM::reloc_arm_movw);
979 // Encode imm which is the same as in emitMOVi32immInstruction().
980 Binary |= Lo16 & 0xFFF;
981 Binary |= ((Lo16 >> 12) & 0xF) << 16;
984 } else if(TID.Opcode == ARM::MOVTi16) {
985 unsigned Hi16 = (getMovi32Value(MI, MI.getOperand(OpIdx),
986 ARM::reloc_arm_movt) >> 16);
987 Binary |= Hi16 & 0xFFF;
988 Binary |= ((Hi16 >> 12) & 0xF) << 16;
991 } else if ((TID.Opcode == ARM::BFC) || (TID.Opcode == ARM::BFI)) {
992 uint32_t v = ~MI.getOperand(2).getImm();
993 int32_t lsb = CountTrailingZeros_32(v);
994 int32_t msb = (32 - CountLeadingZeros_32(v)) - 1;
995 // Instr{20-16} = msb, Instr{11-7} = lsb
996 Binary |= (msb & 0x1F) << 16;
997 Binary |= (lsb & 0x1F) << 7;
1000 } else if ((TID.Opcode == ARM::UBFX) || (TID.Opcode == ARM::SBFX)) {
1001 // Encode Rn in Instr{0-3}
1002 Binary |= getMachineOpValue(MI, OpIdx++);
1004 uint32_t lsb = MI.getOperand(OpIdx++).getImm();
1005 uint32_t widthm1 = MI.getOperand(OpIdx++).getImm() - 1;
1007 // Instr{20-16} = widthm1, Instr{11-7} = lsb
1008 Binary |= (widthm1 & 0x1F) << 16;
1009 Binary |= (lsb & 0x1F) << 7;
1014 // If this is a two-address operand, skip it. e.g. MOVCCr operand 1.
1015 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1018 // Encode first non-shifter register operand if there is one.
1019 bool isUnary = TID.TSFlags & ARMII::UnaryDP;
1022 // Special handling for implicit use (e.g. PC).
1023 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1025 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRnShift;
1030 // Encode shifter operand.
1031 const MachineOperand &MO = MI.getOperand(OpIdx);
1032 if ((TID.TSFlags & ARMII::FormMask) == ARMII::DPSoRegFrm) {
1034 emitWordLE(Binary | getMachineSoRegOpValue(MI, TID, MO, OpIdx));
1039 // Encode register Rm.
1040 emitWordLE(Binary | getARMRegisterNumbering(MO.getReg()));
1045 Binary |= getMachineSoImmOpValue((unsigned)MO.getImm());
1050 void ARMCodeEmitter::emitLoadStoreInstruction(const MachineInstr &MI,
1051 unsigned ImplicitRd,
1052 unsigned ImplicitRn) {
1053 const TargetInstrDesc &TID = MI.getDesc();
1054 unsigned Form = TID.TSFlags & ARMII::FormMask;
1055 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1057 // Part of binary is determined by TableGn.
1058 unsigned Binary = getBinaryCodeForInstr(MI);
1060 // If this is an LDRi12, STRi12 or LDRcp, nothing more needs be done.
1061 if (MI.getOpcode() == ARM::LDRi12 || MI.getOpcode() == ARM::LDRcp ||
1062 MI.getOpcode() == ARM::STRi12) {
1067 // Set the conditional execution predicate
1068 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1072 // Operand 0 of a pre- and post-indexed store is the address base
1073 // writeback. Skip it.
1074 bool Skipped = false;
1075 if (IsPrePost && Form == ARMII::StFrm) {
1080 // Set first operand
1082 // Special handling for implicit use (e.g. PC).
1083 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
1085 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1087 // Set second operand
1089 // Special handling for implicit use (e.g. PC).
1090 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1092 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1094 // If this is a two-address operand, skip it. e.g. LDR_PRE.
1095 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1098 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1099 unsigned AM2Opc = (ImplicitRn == ARM::PC)
1100 ? 0 : MI.getOperand(OpIdx+1).getImm();
1102 // Set bit U(23) according to sign of immed value (positive or negative).
1103 Binary |= ((ARM_AM::getAM2Op(AM2Opc) == ARM_AM::add ? 1 : 0) <<
1105 if (!MO2.getReg()) { // is immediate
1106 if (ARM_AM::getAM2Offset(AM2Opc))
1107 // Set the value of offset_12 field
1108 Binary |= ARM_AM::getAM2Offset(AM2Opc);
1113 // Set bit I(25), because this is not in immediate encoding.
1114 Binary |= 1 << ARMII::I_BitShift;
1115 assert(TargetRegisterInfo::isPhysicalRegister(MO2.getReg()));
1116 // Set bit[3:0] to the corresponding Rm register
1117 Binary |= getARMRegisterNumbering(MO2.getReg());
1119 // If this instr is in scaled register offset/index instruction, set
1120 // shift_immed(bit[11:7]) and shift(bit[6:5]) fields.
1121 if (unsigned ShImm = ARM_AM::getAM2Offset(AM2Opc)) {
1122 Binary |= getShiftOp(AM2Opc) << ARMII::ShiftImmShift; // shift
1123 Binary |= ShImm << ARMII::ShiftShift; // shift_immed
1129 void ARMCodeEmitter::emitMiscLoadStoreInstruction(const MachineInstr &MI,
1130 unsigned ImplicitRn) {
1131 const TargetInstrDesc &TID = MI.getDesc();
1132 unsigned Form = TID.TSFlags & ARMII::FormMask;
1133 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1135 // Part of binary is determined by TableGn.
1136 unsigned Binary = getBinaryCodeForInstr(MI);
1138 // Set the conditional execution predicate
1139 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1143 // Operand 0 of a pre- and post-indexed store is the address base
1144 // writeback. Skip it.
1145 bool Skipped = false;
1146 if (IsPrePost && Form == ARMII::StMiscFrm) {
1151 // Set first operand
1152 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1154 // Skip LDRD and STRD's second operand.
1155 if (TID.Opcode == ARM::LDRD || TID.Opcode == ARM::STRD)
1158 // Set second operand
1160 // Special handling for implicit use (e.g. PC).
1161 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1163 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1165 // If this is a two-address operand, skip it. e.g. LDRH_POST.
1166 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1169 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1170 unsigned AM3Opc = (ImplicitRn == ARM::PC)
1171 ? 0 : MI.getOperand(OpIdx+1).getImm();
1173 // Set bit U(23) according to sign of immed value (positive or negative)
1174 Binary |= ((ARM_AM::getAM3Op(AM3Opc) == ARM_AM::add ? 1 : 0) <<
1177 // If this instr is in register offset/index encoding, set bit[3:0]
1178 // to the corresponding Rm register.
1180 Binary |= getARMRegisterNumbering(MO2.getReg());
1185 // This instr is in immediate offset/index encoding, set bit 22 to 1.
1186 Binary |= 1 << ARMII::AM3_I_BitShift;
1187 if (unsigned ImmOffs = ARM_AM::getAM3Offset(AM3Opc)) {
1189 Binary |= (ImmOffs >> 4) << ARMII::ImmHiShift; // immedH
1190 Binary |= (ImmOffs & 0xF); // immedL
1196 static unsigned getAddrModeUPBits(unsigned Mode) {
1197 unsigned Binary = 0;
1199 // Set addressing mode by modifying bits U(23) and P(24)
1200 // IA - Increment after - bit U = 1 and bit P = 0
1201 // IB - Increment before - bit U = 1 and bit P = 1
1202 // DA - Decrement after - bit U = 0 and bit P = 0
1203 // DB - Decrement before - bit U = 0 and bit P = 1
1205 default: llvm_unreachable("Unknown addressing sub-mode!");
1206 case ARM_AM::da: break;
1207 case ARM_AM::db: Binary |= 0x1 << ARMII::P_BitShift; break;
1208 case ARM_AM::ia: Binary |= 0x1 << ARMII::U_BitShift; break;
1209 case ARM_AM::ib: Binary |= 0x3 << ARMII::U_BitShift; break;
1215 void ARMCodeEmitter::emitLoadStoreMultipleInstruction(const MachineInstr &MI) {
1216 const TargetInstrDesc &TID = MI.getDesc();
1217 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1219 // Part of binary is determined by TableGn.
1220 unsigned Binary = getBinaryCodeForInstr(MI);
1222 // Set the conditional execution predicate
1223 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1225 // Skip operand 0 of an instruction with base register update.
1230 // Set base address operand
1231 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1233 // Set addressing mode by modifying bits U(23) and P(24)
1234 ARM_AM::AMSubMode Mode = ARM_AM::getLoadStoreMultipleSubMode(MI.getOpcode());
1235 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(Mode));
1239 Binary |= 0x1 << ARMII::W_BitShift;
1242 for (unsigned i = OpIdx+2, e = MI.getNumOperands(); i != e; ++i) {
1243 const MachineOperand &MO = MI.getOperand(i);
1244 if (!MO.isReg() || MO.isImplicit())
1246 unsigned RegNum = getARMRegisterNumbering(MO.getReg());
1247 assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
1249 Binary |= 0x1 << RegNum;
1255 void ARMCodeEmitter::emitMulFrmInstruction(const MachineInstr &MI) {
1256 const TargetInstrDesc &TID = MI.getDesc();
1258 // Part of binary is determined by TableGn.
1259 unsigned Binary = getBinaryCodeForInstr(MI);
1261 // Set the conditional execution predicate
1262 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1264 // Encode S bit if MI modifies CPSR.
1265 Binary |= getAddrModeSBit(MI, TID);
1267 // 32x32->64bit operations have two destination registers. The number
1268 // of register definitions will tell us if that's what we're dealing with.
1270 if (TID.getNumDefs() == 2)
1271 Binary |= getMachineOpValue (MI, OpIdx++) << ARMII::RegRdLoShift;
1274 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdHiShift;
1277 Binary |= getMachineOpValue(MI, OpIdx++);
1280 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRsShift;
1282 // Many multiple instructions (e.g. MLA) have three src operands. Encode
1283 // it as Rn (for multiply, that's in the same offset as RdLo.
1284 if (TID.getNumOperands() > OpIdx &&
1285 !TID.OpInfo[OpIdx].isPredicate() &&
1286 !TID.OpInfo[OpIdx].isOptionalDef())
1287 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRdLoShift;
1292 void ARMCodeEmitter::emitExtendInstruction(const MachineInstr &MI) {
1293 const TargetInstrDesc &TID = MI.getDesc();
1295 // Part of binary is determined by TableGn.
1296 unsigned Binary = getBinaryCodeForInstr(MI);
1298 // Set the conditional execution predicate
1299 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1304 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1306 const MachineOperand &MO1 = MI.getOperand(OpIdx++);
1307 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1309 // Two register operand form.
1311 Binary |= getMachineOpValue(MI, MO1) << ARMII::RegRnShift;
1314 Binary |= getMachineOpValue(MI, MO2);
1317 Binary |= getMachineOpValue(MI, MO1);
1320 // Encode rot imm (0, 8, 16, or 24) if it has a rotate immediate operand.
1321 if (MI.getOperand(OpIdx).isImm() &&
1322 !TID.OpInfo[OpIdx].isPredicate() &&
1323 !TID.OpInfo[OpIdx].isOptionalDef())
1324 Binary |= (getMachineOpValue(MI, OpIdx) / 8) << ARMII::ExtRotImmShift;
1329 void ARMCodeEmitter::emitMiscArithInstruction(const MachineInstr &MI) {
1330 const TargetInstrDesc &TID = MI.getDesc();
1332 // Part of binary is determined by TableGn.
1333 unsigned Binary = getBinaryCodeForInstr(MI);
1335 // Set the conditional execution predicate
1336 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1341 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1343 const MachineOperand &MO = MI.getOperand(OpIdx++);
1344 if (OpIdx == TID.getNumOperands() ||
1345 TID.OpInfo[OpIdx].isPredicate() ||
1346 TID.OpInfo[OpIdx].isOptionalDef()) {
1347 // Encode Rm and it's done.
1348 Binary |= getMachineOpValue(MI, MO);
1354 Binary |= getMachineOpValue(MI, MO) << ARMII::RegRnShift;
1357 Binary |= getMachineOpValue(MI, OpIdx++);
1359 // Encode shift_imm.
1360 unsigned ShiftAmt = MI.getOperand(OpIdx).getImm();
1361 if (TID.Opcode == ARM::PKHTB) {
1362 assert(ShiftAmt != 0 && "PKHTB shift_imm is 0!");
1366 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1367 Binary |= ShiftAmt << ARMII::ShiftShift;
1372 void ARMCodeEmitter::emitSaturateInstruction(const MachineInstr &MI) {
1373 const TargetInstrDesc &TID = MI.getDesc();
1375 // Part of binary is determined by TableGen.
1376 unsigned Binary = getBinaryCodeForInstr(MI);
1378 // Set the conditional execution predicate
1379 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1382 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
1384 // Encode saturate bit position.
1385 unsigned Pos = MI.getOperand(1).getImm();
1386 if (TID.Opcode == ARM::SSAT || TID.Opcode == ARM::SSAT16)
1388 assert((Pos < 16 || (Pos < 32 &&
1389 TID.Opcode != ARM::SSAT16 &&
1390 TID.Opcode != ARM::USAT16)) &&
1391 "saturate bit position out of range");
1392 Binary |= Pos << 16;
1395 Binary |= getMachineOpValue(MI, 2);
1397 // Encode shift_imm.
1398 if (TID.getNumOperands() == 4) {
1399 unsigned ShiftOp = MI.getOperand(3).getImm();
1400 ARM_AM::ShiftOpc Opc = ARM_AM::getSORegShOp(ShiftOp);
1401 if (Opc == ARM_AM::asr)
1403 unsigned ShiftAmt = MI.getOperand(3).getImm();
1404 if (ShiftAmt == 32 && Opc == ARM_AM::asr)
1406 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1407 Binary |= ShiftAmt << ARMII::ShiftShift;
1413 void ARMCodeEmitter::emitBranchInstruction(const MachineInstr &MI) {
1414 const TargetInstrDesc &TID = MI.getDesc();
1416 if (TID.Opcode == ARM::TPsoft) {
1417 llvm_unreachable("ARM::TPsoft FIXME"); // FIXME
1420 // Part of binary is determined by TableGn.
1421 unsigned Binary = getBinaryCodeForInstr(MI);
1423 // Set the conditional execution predicate
1424 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1426 // Set signed_immed_24 field
1427 Binary |= getMachineOpValue(MI, 0);
1432 void ARMCodeEmitter::emitInlineJumpTable(unsigned JTIndex) {
1433 // Remember the base address of the inline jump table.
1434 uintptr_t JTBase = MCE.getCurrentPCValue();
1435 JTI->addJumpTableBaseAddr(JTIndex, JTBase);
1436 DEBUG(errs() << " ** Jump Table #" << JTIndex << " @ " << (void*)JTBase
1439 // Now emit the jump table entries.
1440 const std::vector<MachineBasicBlock*> &MBBs = (*MJTEs)[JTIndex].MBBs;
1441 for (unsigned i = 0, e = MBBs.size(); i != e; ++i) {
1443 // DestBB address - JT base.
1444 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_pic_jt, JTBase);
1446 // Absolute DestBB address.
1447 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_absolute);
1452 void ARMCodeEmitter::emitMiscBranchInstruction(const MachineInstr &MI) {
1453 const TargetInstrDesc &TID = MI.getDesc();
1455 // Handle jump tables.
1456 if (TID.Opcode == ARM::BR_JTr || TID.Opcode == ARM::BR_JTadd) {
1457 // First emit a ldr pc, [] instruction.
1458 emitDataProcessingInstruction(MI, ARM::PC);
1460 // Then emit the inline jump table.
1462 (TID.Opcode == ARM::BR_JTr)
1463 ? MI.getOperand(1).getIndex() : MI.getOperand(2).getIndex();
1464 emitInlineJumpTable(JTIndex);
1466 } else if (TID.Opcode == ARM::BR_JTm) {
1467 // First emit a ldr pc, [] instruction.
1468 emitLoadStoreInstruction(MI, ARM::PC);
1470 // Then emit the inline jump table.
1471 emitInlineJumpTable(MI.getOperand(3).getIndex());
1475 // Part of binary is determined by TableGn.
1476 unsigned Binary = getBinaryCodeForInstr(MI);
1478 // Set the conditional execution predicate
1479 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1481 if (TID.Opcode == ARM::BX_RET || TID.Opcode == ARM::MOVPCLR)
1482 // The return register is LR.
1483 Binary |= getARMRegisterNumbering(ARM::LR);
1485 // otherwise, set the return register
1486 Binary |= getMachineOpValue(MI, 0);
1491 static unsigned encodeVFPRd(const MachineInstr &MI, unsigned OpIdx) {
1492 unsigned RegD = MI.getOperand(OpIdx).getReg();
1493 unsigned Binary = 0;
1494 bool isSPVFP = ARM::SPRRegisterClass->contains(RegD);
1495 RegD = getARMRegisterNumbering(RegD);
1497 Binary |= RegD << ARMII::RegRdShift;
1499 Binary |= ((RegD & 0x1E) >> 1) << ARMII::RegRdShift;
1500 Binary |= (RegD & 0x01) << ARMII::D_BitShift;
1505 static unsigned encodeVFPRn(const MachineInstr &MI, unsigned OpIdx) {
1506 unsigned RegN = MI.getOperand(OpIdx).getReg();
1507 unsigned Binary = 0;
1508 bool isSPVFP = ARM::SPRRegisterClass->contains(RegN);
1509 RegN = getARMRegisterNumbering(RegN);
1511 Binary |= RegN << ARMII::RegRnShift;
1513 Binary |= ((RegN & 0x1E) >> 1) << ARMII::RegRnShift;
1514 Binary |= (RegN & 0x01) << ARMII::N_BitShift;
1519 static unsigned encodeVFPRm(const MachineInstr &MI, unsigned OpIdx) {
1520 unsigned RegM = MI.getOperand(OpIdx).getReg();
1521 unsigned Binary = 0;
1522 bool isSPVFP = ARM::SPRRegisterClass->contains(RegM);
1523 RegM = getARMRegisterNumbering(RegM);
1527 Binary |= ((RegM & 0x1E) >> 1);
1528 Binary |= (RegM & 0x01) << ARMII::M_BitShift;
1533 void ARMCodeEmitter::emitVFPArithInstruction(const MachineInstr &MI) {
1534 const TargetInstrDesc &TID = MI.getDesc();
1536 // Part of binary is determined by TableGn.
1537 unsigned Binary = getBinaryCodeForInstr(MI);
1539 // Set the conditional execution predicate
1540 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1543 assert((Binary & ARMII::D_BitShift) == 0 &&
1544 (Binary & ARMII::N_BitShift) == 0 &&
1545 (Binary & ARMII::M_BitShift) == 0 && "VFP encoding bug!");
1548 Binary |= encodeVFPRd(MI, OpIdx++);
1550 // If this is a two-address operand, skip it, e.g. FMACD.
1551 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1555 if ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPBinaryFrm)
1556 Binary |= encodeVFPRn(MI, OpIdx++);
1558 if (OpIdx == TID.getNumOperands() ||
1559 TID.OpInfo[OpIdx].isPredicate() ||
1560 TID.OpInfo[OpIdx].isOptionalDef()) {
1561 // FCMPEZD etc. has only one operand.
1567 Binary |= encodeVFPRm(MI, OpIdx);
1572 void ARMCodeEmitter::emitVFPConversionInstruction(const MachineInstr &MI) {
1573 const TargetInstrDesc &TID = MI.getDesc();
1574 unsigned Form = TID.TSFlags & ARMII::FormMask;
1576 // Part of binary is determined by TableGn.
1577 unsigned Binary = getBinaryCodeForInstr(MI);
1579 // Set the conditional execution predicate
1580 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1584 case ARMII::VFPConv1Frm:
1585 case ARMII::VFPConv2Frm:
1586 case ARMII::VFPConv3Frm:
1588 Binary |= encodeVFPRd(MI, 0);
1590 case ARMII::VFPConv4Frm:
1592 Binary |= encodeVFPRn(MI, 0);
1594 case ARMII::VFPConv5Frm:
1596 Binary |= encodeVFPRm(MI, 0);
1602 case ARMII::VFPConv1Frm:
1604 Binary |= encodeVFPRm(MI, 1);
1606 case ARMII::VFPConv2Frm:
1607 case ARMII::VFPConv3Frm:
1609 Binary |= encodeVFPRn(MI, 1);
1611 case ARMII::VFPConv4Frm:
1612 case ARMII::VFPConv5Frm:
1614 Binary |= encodeVFPRd(MI, 1);
1618 if (Form == ARMII::VFPConv5Frm)
1620 Binary |= encodeVFPRn(MI, 2);
1621 else if (Form == ARMII::VFPConv3Frm)
1623 Binary |= encodeVFPRm(MI, 2);
1628 void ARMCodeEmitter::emitVFPLoadStoreInstruction(const MachineInstr &MI) {
1629 // Part of binary is determined by TableGn.
1630 unsigned Binary = getBinaryCodeForInstr(MI);
1632 // Set the conditional execution predicate
1633 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1638 Binary |= encodeVFPRd(MI, OpIdx++);
1640 // Encode address base.
1641 const MachineOperand &Base = MI.getOperand(OpIdx++);
1642 Binary |= getMachineOpValue(MI, Base) << ARMII::RegRnShift;
1644 // If there is a non-zero immediate offset, encode it.
1646 const MachineOperand &Offset = MI.getOperand(OpIdx);
1647 if (unsigned ImmOffs = ARM_AM::getAM5Offset(Offset.getImm())) {
1648 if (ARM_AM::getAM5Op(Offset.getImm()) == ARM_AM::add)
1649 Binary |= 1 << ARMII::U_BitShift;
1656 // If immediate offset is omitted, default to +0.
1657 Binary |= 1 << ARMII::U_BitShift;
1663 ARMCodeEmitter::emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI) {
1664 const TargetInstrDesc &TID = MI.getDesc();
1665 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1667 // Part of binary is determined by TableGn.
1668 unsigned Binary = getBinaryCodeForInstr(MI);
1670 // Set the conditional execution predicate
1671 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1673 // Skip operand 0 of an instruction with base register update.
1678 // Set base address operand
1679 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1681 // Set addressing mode by modifying bits U(23) and P(24)
1682 ARM_AM::AMSubMode Mode = ARM_AM::getLoadStoreMultipleSubMode(MI.getOpcode());
1683 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(Mode));
1687 Binary |= 0x1 << ARMII::W_BitShift;
1689 // First register is encoded in Dd.
1690 Binary |= encodeVFPRd(MI, OpIdx+2);
1692 // Count the number of registers.
1693 unsigned NumRegs = 1;
1694 for (unsigned i = OpIdx+3, e = MI.getNumOperands(); i != e; ++i) {
1695 const MachineOperand &MO = MI.getOperand(i);
1696 if (!MO.isReg() || MO.isImplicit())
1700 // Bit 8 will be set if <list> is consecutive 64-bit registers (e.g., D0)
1701 // Otherwise, it will be 0, in the case of 32-bit registers.
1703 Binary |= NumRegs * 2;
1710 static unsigned encodeNEONRd(const MachineInstr &MI, unsigned OpIdx) {
1711 unsigned RegD = MI.getOperand(OpIdx).getReg();
1712 unsigned Binary = 0;
1713 RegD = getARMRegisterNumbering(RegD);
1714 Binary |= (RegD & 0xf) << ARMII::RegRdShift;
1715 Binary |= ((RegD >> 4) & 1) << ARMII::D_BitShift;
1719 static unsigned encodeNEONRn(const MachineInstr &MI, unsigned OpIdx) {
1720 unsigned RegN = MI.getOperand(OpIdx).getReg();
1721 unsigned Binary = 0;
1722 RegN = getARMRegisterNumbering(RegN);
1723 Binary |= (RegN & 0xf) << ARMII::RegRnShift;
1724 Binary |= ((RegN >> 4) & 1) << ARMII::N_BitShift;
1728 static unsigned encodeNEONRm(const MachineInstr &MI, unsigned OpIdx) {
1729 unsigned RegM = MI.getOperand(OpIdx).getReg();
1730 unsigned Binary = 0;
1731 RegM = getARMRegisterNumbering(RegM);
1732 Binary |= (RegM & 0xf);
1733 Binary |= ((RegM >> 4) & 1) << ARMII::M_BitShift;
1737 /// convertNEONDataProcToThumb - Convert the ARM mode encoding for a NEON
1738 /// data-processing instruction to the corresponding Thumb encoding.
1739 static unsigned convertNEONDataProcToThumb(unsigned Binary) {
1740 assert((Binary & 0xfe000000) == 0xf2000000 &&
1741 "not an ARM NEON data-processing instruction");
1742 unsigned UBit = (Binary >> 24) & 1;
1743 return 0xef000000 | (UBit << 28) | (Binary & 0xffffff);
1746 void ARMCodeEmitter::emitNEONLaneInstruction(const MachineInstr &MI) {
1747 unsigned Binary = getBinaryCodeForInstr(MI);
1749 unsigned RegTOpIdx, RegNOpIdx, LnOpIdx;
1750 const TargetInstrDesc &TID = MI.getDesc();
1751 if ((TID.TSFlags & ARMII::FormMask) == ARMII::NGetLnFrm) {
1755 } else { // ARMII::NSetLnFrm
1761 // Set the conditional execution predicate
1762 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1764 unsigned RegT = MI.getOperand(RegTOpIdx).getReg();
1765 RegT = getARMRegisterNumbering(RegT);
1766 Binary |= (RegT << ARMII::RegRdShift);
1767 Binary |= encodeNEONRn(MI, RegNOpIdx);
1770 if ((Binary & (1 << 22)) != 0)
1771 LaneShift = 0; // 8-bit elements
1772 else if ((Binary & (1 << 5)) != 0)
1773 LaneShift = 1; // 16-bit elements
1775 LaneShift = 2; // 32-bit elements
1777 unsigned Lane = MI.getOperand(LnOpIdx).getImm() << LaneShift;
1778 unsigned Opc1 = Lane >> 2;
1779 unsigned Opc2 = Lane & 3;
1780 assert((Opc1 & 3) == 0 && "out-of-range lane number operand");
1781 Binary |= (Opc1 << 21);
1782 Binary |= (Opc2 << 5);
1787 void ARMCodeEmitter::emitNEONDupInstruction(const MachineInstr &MI) {
1788 unsigned Binary = getBinaryCodeForInstr(MI);
1790 // Set the conditional execution predicate
1791 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1793 unsigned RegT = MI.getOperand(1).getReg();
1794 RegT = getARMRegisterNumbering(RegT);
1795 Binary |= (RegT << ARMII::RegRdShift);
1796 Binary |= encodeNEONRn(MI, 0);
1800 void ARMCodeEmitter::emitNEON1RegModImmInstruction(const MachineInstr &MI) {
1801 unsigned Binary = getBinaryCodeForInstr(MI);
1802 // Destination register is encoded in Dd.
1803 Binary |= encodeNEONRd(MI, 0);
1804 // Immediate fields: Op, Cmode, I, Imm3, Imm4
1805 unsigned Imm = MI.getOperand(1).getImm();
1806 unsigned Op = (Imm >> 12) & 1;
1807 unsigned Cmode = (Imm >> 8) & 0xf;
1808 unsigned I = (Imm >> 7) & 1;
1809 unsigned Imm3 = (Imm >> 4) & 0x7;
1810 unsigned Imm4 = Imm & 0xf;
1811 Binary |= (I << 24) | (Imm3 << 16) | (Cmode << 8) | (Op << 5) | Imm4;
1813 Binary = convertNEONDataProcToThumb(Binary);
1817 void ARMCodeEmitter::emitNEON2RegInstruction(const MachineInstr &MI) {
1818 const TargetInstrDesc &TID = MI.getDesc();
1819 unsigned Binary = getBinaryCodeForInstr(MI);
1820 // Destination register is encoded in Dd; source register in Dm.
1822 Binary |= encodeNEONRd(MI, OpIdx++);
1823 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1825 Binary |= encodeNEONRm(MI, OpIdx);
1827 Binary = convertNEONDataProcToThumb(Binary);
1828 // FIXME: This does not handle VDUPfdf or VDUPfqf.
1832 void ARMCodeEmitter::emitNEON3RegInstruction(const MachineInstr &MI) {
1833 const TargetInstrDesc &TID = MI.getDesc();
1834 unsigned Binary = getBinaryCodeForInstr(MI);
1835 // Destination register is encoded in Dd; source registers in Dn and Dm.
1837 Binary |= encodeNEONRd(MI, OpIdx++);
1838 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1840 Binary |= encodeNEONRn(MI, OpIdx++);
1841 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1843 Binary |= encodeNEONRm(MI, OpIdx);
1845 Binary = convertNEONDataProcToThumb(Binary);
1846 // FIXME: This does not handle VMOVDneon or VMOVQ.
1850 #include "ARMGenCodeEmitter.inc"