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 getT2SORegOpValue(const MachineInstr &MI, unsigned Op)
182 unsigned getRotImmOpValue(const MachineInstr &MI, unsigned Op)
184 unsigned getImmMinusOneOpValue(const MachineInstr &MI, unsigned Op)
186 unsigned getAddrMode6AddressOpValue(const MachineInstr &MI, unsigned Op)
188 unsigned getAddrMode6OffsetOpValue(const MachineInstr &MI, unsigned Op)
190 unsigned getBitfieldInvertedMaskOpValue(const MachineInstr &MI,
191 unsigned Op) const { return 0; }
192 uint32_t getLdStmModeOpValue(const MachineInstr &MI, unsigned OpIdx)
194 uint32_t getLdStSORegOpValue(const MachineInstr &MI, unsigned OpIdx)
197 unsigned getAddrModeImm12OpValue(const MachineInstr &MI, unsigned Op)
200 // {12} = (U)nsigned (add == '1', sub == '0')
202 const MachineOperand &MO = MI.getOperand(Op);
203 const MachineOperand &MO1 = MI.getOperand(Op + 1);
205 emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry);
208 unsigned Reg = getARMRegisterNumbering(MO.getReg());
209 int32_t Imm12 = MO1.getImm();
211 Binary = Imm12 & 0xfff;
214 Binary |= (Reg << 13);
217 uint32_t getAddrMode3OffsetOpValue(const MachineInstr &MI, unsigned OpIdx)
219 uint32_t getAddrMode3OpValue(const MachineInstr &MI, unsigned Op) const
221 uint32_t getAddrMode5OpValue(const MachineInstr &MI, unsigned Op) const {
223 // {8} = (U)nsigned (add == '1', sub == '0')
225 const MachineOperand &MO = MI.getOperand(Op);
226 const MachineOperand &MO1 = MI.getOperand(Op + 1);
228 emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry);
231 unsigned Reg = getARMRegisterNumbering(MO.getReg());
232 int32_t Imm8 = MO1.getImm();
234 Binary = Imm8 & 0xff;
237 Binary |= (Reg << 9);
240 unsigned getNEONVcvtImm32OpValue(const MachineInstr &MI, unsigned Op)
243 unsigned getRegisterListOpValue(const MachineInstr &MI, unsigned Op)
246 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
247 /// machine operand requires relocation, record the relocation and return
249 unsigned getMovi32Value(const MachineInstr &MI,const MachineOperand &MO,
252 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
254 unsigned getShiftOp(unsigned Imm) const ;
256 /// Routines that handle operands which add machine relocations which are
257 /// fixed up by the relocation stage.
258 void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
259 bool MayNeedFarStub, bool Indirect,
260 intptr_t ACPV = 0) const;
261 void emitExternalSymbolAddress(const char *ES, unsigned Reloc) const;
262 void emitConstPoolAddress(unsigned CPI, unsigned Reloc) const;
263 void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const;
264 void emitMachineBasicBlock(MachineBasicBlock *BB, unsigned Reloc,
265 intptr_t JTBase = 0) const;
269 char ARMCodeEmitter::ID = 0;
271 /// createARMJITCodeEmitterPass - Return a pass that emits the collected ARM
272 /// code to the specified MCE object.
273 FunctionPass *llvm::createARMJITCodeEmitterPass(ARMBaseTargetMachine &TM,
274 JITCodeEmitter &JCE) {
275 return new ARMCodeEmitter(TM, JCE);
278 bool ARMCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
279 assert((MF.getTarget().getRelocationModel() != Reloc::Default ||
280 MF.getTarget().getRelocationModel() != Reloc::Static) &&
281 "JIT relocation model must be set to static or default!");
282 JTI = ((ARMTargetMachine &)MF.getTarget()).getJITInfo();
283 II = ((const ARMTargetMachine &)MF.getTarget()).getInstrInfo();
284 TD = ((const ARMTargetMachine &)MF.getTarget()).getTargetData();
285 Subtarget = &TM.getSubtarget<ARMSubtarget>();
286 MCPEs = &MF.getConstantPool()->getConstants();
288 if (MF.getJumpTableInfo()) MJTEs = &MF.getJumpTableInfo()->getJumpTables();
289 IsPIC = TM.getRelocationModel() == Reloc::PIC_;
290 IsThumb = MF.getInfo<ARMFunctionInfo>()->isThumbFunction();
291 JTI->Initialize(MF, IsPIC);
292 MMI = &getAnalysis<MachineModuleInfo>();
293 MCE.setModuleInfo(MMI);
296 DEBUG(errs() << "JITTing function '"
297 << MF.getFunction()->getName() << "'\n");
298 MCE.startFunction(MF);
299 for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
301 MCE.StartMachineBasicBlock(MBB);
302 for (MachineBasicBlock::const_iterator I = MBB->begin(), E = MBB->end();
306 } while (MCE.finishFunction(MF));
311 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
313 unsigned ARMCodeEmitter::getShiftOp(unsigned Imm) const {
314 switch (ARM_AM::getAM2ShiftOpc(Imm)) {
315 default: llvm_unreachable("Unknown shift opc!");
316 case ARM_AM::asr: return 2;
317 case ARM_AM::lsl: return 0;
318 case ARM_AM::lsr: return 1;
320 case ARM_AM::rrx: return 3;
325 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the
326 /// machine operand requires relocation, record the relocation and return zero.
327 unsigned ARMCodeEmitter::getMovi32Value(const MachineInstr &MI,
328 const MachineOperand &MO,
330 assert(((Reloc == ARM::reloc_arm_movt) || (Reloc == ARM::reloc_arm_movw))
331 && "Relocation to this function should be for movt or movw");
334 return static_cast<unsigned>(MO.getImm());
335 else if (MO.isGlobal())
336 emitGlobalAddress(MO.getGlobal(), Reloc, true, false);
337 else if (MO.isSymbol())
338 emitExternalSymbolAddress(MO.getSymbolName(), Reloc);
340 emitMachineBasicBlock(MO.getMBB(), Reloc);
345 llvm_unreachable("Unsupported operand type for movw/movt");
350 /// getMachineOpValue - Return binary encoding of operand. If the machine
351 /// operand requires relocation, record the relocation and return zero.
352 unsigned ARMCodeEmitter::getMachineOpValue(const MachineInstr &MI,
353 const MachineOperand &MO) const {
355 return getARMRegisterNumbering(MO.getReg());
357 return static_cast<unsigned>(MO.getImm());
358 else if (MO.isGlobal())
359 emitGlobalAddress(MO.getGlobal(), ARM::reloc_arm_branch, true, false);
360 else if (MO.isSymbol())
361 emitExternalSymbolAddress(MO.getSymbolName(), ARM::reloc_arm_branch);
362 else if (MO.isCPI()) {
363 const TargetInstrDesc &TID = MI.getDesc();
364 // For VFP load, the immediate offset is multiplied by 4.
365 unsigned Reloc = ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPLdStFrm)
366 ? ARM::reloc_arm_vfp_cp_entry : ARM::reloc_arm_cp_entry;
367 emitConstPoolAddress(MO.getIndex(), Reloc);
368 } else if (MO.isJTI())
369 emitJumpTableAddress(MO.getIndex(), ARM::reloc_arm_relative);
371 emitMachineBasicBlock(MO.getMBB(), ARM::reloc_arm_branch);
381 /// emitGlobalAddress - Emit the specified address to the code stream.
383 void ARMCodeEmitter::emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
384 bool MayNeedFarStub, bool Indirect,
385 intptr_t ACPV) const {
386 MachineRelocation MR = Indirect
387 ? MachineRelocation::getIndirectSymbol(MCE.getCurrentPCOffset(), Reloc,
388 const_cast<GlobalValue *>(GV),
389 ACPV, MayNeedFarStub)
390 : MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc,
391 const_cast<GlobalValue *>(GV), ACPV,
393 MCE.addRelocation(MR);
396 /// emitExternalSymbolAddress - Arrange for the address of an external symbol to
397 /// be emitted to the current location in the function, and allow it to be PC
399 void ARMCodeEmitter::
400 emitExternalSymbolAddress(const char *ES, unsigned Reloc) const {
401 MCE.addRelocation(MachineRelocation::getExtSym(MCE.getCurrentPCOffset(),
405 /// emitConstPoolAddress - Arrange for the address of an constant pool
406 /// to be emitted to the current location in the function, and allow it to be PC
408 void ARMCodeEmitter::emitConstPoolAddress(unsigned CPI, unsigned Reloc) const {
409 // Tell JIT emitter we'll resolve the address.
410 MCE.addRelocation(MachineRelocation::getConstPool(MCE.getCurrentPCOffset(),
411 Reloc, CPI, 0, true));
414 /// emitJumpTableAddress - Arrange for the address of a jump table to
415 /// be emitted to the current location in the function, and allow it to be PC
417 void ARMCodeEmitter::
418 emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const {
419 MCE.addRelocation(MachineRelocation::getJumpTable(MCE.getCurrentPCOffset(),
420 Reloc, JTIndex, 0, true));
423 /// emitMachineBasicBlock - Emit the specified address basic block.
424 void ARMCodeEmitter::emitMachineBasicBlock(MachineBasicBlock *BB,
426 intptr_t JTBase) const {
427 MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(),
431 void ARMCodeEmitter::emitWordLE(unsigned Binary) {
432 DEBUG(errs() << " 0x";
433 errs().write_hex(Binary) << "\n");
434 MCE.emitWordLE(Binary);
437 void ARMCodeEmitter::emitDWordLE(uint64_t Binary) {
438 DEBUG(errs() << " 0x";
439 errs().write_hex(Binary) << "\n");
440 MCE.emitDWordLE(Binary);
443 void ARMCodeEmitter::emitInstruction(const MachineInstr &MI) {
444 DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << MI);
446 MCE.processDebugLoc(MI.getDebugLoc(), true);
448 ++NumEmitted; // Keep track of the # of mi's emitted
449 switch (MI.getDesc().TSFlags & ARMII::FormMask) {
451 llvm_unreachable("Unhandled instruction encoding format!");
455 emitPseudoInstruction(MI);
458 case ARMII::DPSoRegFrm:
459 emitDataProcessingInstruction(MI);
463 emitLoadStoreInstruction(MI);
465 case ARMII::LdMiscFrm:
466 case ARMII::StMiscFrm:
467 emitMiscLoadStoreInstruction(MI);
469 case ARMII::LdStMulFrm:
470 emitLoadStoreMultipleInstruction(MI);
473 emitMulFrmInstruction(MI);
476 emitExtendInstruction(MI);
478 case ARMII::ArithMiscFrm:
479 emitMiscArithInstruction(MI);
482 emitSaturateInstruction(MI);
485 emitBranchInstruction(MI);
487 case ARMII::BrMiscFrm:
488 emitMiscBranchInstruction(MI);
491 case ARMII::VFPUnaryFrm:
492 case ARMII::VFPBinaryFrm:
493 emitVFPArithInstruction(MI);
495 case ARMII::VFPConv1Frm:
496 case ARMII::VFPConv2Frm:
497 case ARMII::VFPConv3Frm:
498 case ARMII::VFPConv4Frm:
499 case ARMII::VFPConv5Frm:
500 emitVFPConversionInstruction(MI);
502 case ARMII::VFPLdStFrm:
503 emitVFPLoadStoreInstruction(MI);
505 case ARMII::VFPLdStMulFrm:
506 emitVFPLoadStoreMultipleInstruction(MI);
509 // NEON instructions.
510 case ARMII::NGetLnFrm:
511 case ARMII::NSetLnFrm:
512 emitNEONLaneInstruction(MI);
515 emitNEONDupInstruction(MI);
517 case ARMII::N1RegModImmFrm:
518 emitNEON1RegModImmInstruction(MI);
520 case ARMII::N2RegFrm:
521 emitNEON2RegInstruction(MI);
523 case ARMII::N3RegFrm:
524 emitNEON3RegInstruction(MI);
527 MCE.processDebugLoc(MI.getDebugLoc(), false);
530 void ARMCodeEmitter::emitConstPoolInstruction(const MachineInstr &MI) {
531 unsigned CPI = MI.getOperand(0).getImm(); // CP instruction index.
532 unsigned CPIndex = MI.getOperand(1).getIndex(); // Actual cp entry index.
533 const MachineConstantPoolEntry &MCPE = (*MCPEs)[CPIndex];
535 // Remember the CONSTPOOL_ENTRY address for later relocation.
536 JTI->addConstantPoolEntryAddr(CPI, MCE.getCurrentPCValue());
538 // Emit constpool island entry. In most cases, the actual values will be
539 // resolved and relocated after code emission.
540 if (MCPE.isMachineConstantPoolEntry()) {
541 ARMConstantPoolValue *ACPV =
542 static_cast<ARMConstantPoolValue*>(MCPE.Val.MachineCPVal);
544 DEBUG(errs() << " ** ARM constant pool #" << CPI << " @ "
545 << (void*)MCE.getCurrentPCValue() << " " << *ACPV << '\n');
547 assert(ACPV->isGlobalValue() && "unsupported constant pool value");
548 const GlobalValue *GV = ACPV->getGV();
550 Reloc::Model RelocM = TM.getRelocationModel();
551 emitGlobalAddress(GV, ARM::reloc_arm_machine_cp_entry,
553 Subtarget->GVIsIndirectSymbol(GV, RelocM),
556 emitExternalSymbolAddress(ACPV->getSymbol(), ARM::reloc_arm_absolute);
560 const Constant *CV = MCPE.Val.ConstVal;
563 errs() << " ** Constant pool #" << CPI << " @ "
564 << (void*)MCE.getCurrentPCValue() << " ";
565 if (const Function *F = dyn_cast<Function>(CV))
566 errs() << F->getName();
572 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
573 emitGlobalAddress(GV, ARM::reloc_arm_absolute, isa<Function>(GV), false);
575 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
576 uint32_t Val = uint32_t(*CI->getValue().getRawData());
578 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
579 if (CFP->getType()->isFloatTy())
580 emitWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
581 else if (CFP->getType()->isDoubleTy())
582 emitDWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
584 llvm_unreachable("Unable to handle this constantpool entry!");
587 llvm_unreachable("Unable to handle this constantpool entry!");
592 void ARMCodeEmitter::emitMOVi32immInstruction(const MachineInstr &MI) {
593 const MachineOperand &MO0 = MI.getOperand(0);
594 const MachineOperand &MO1 = MI.getOperand(1);
596 // Emit the 'movw' instruction.
597 unsigned Binary = 0x30 << 20; // mov: Insts{27-20} = 0b00110000
599 unsigned Lo16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movw) & 0xFFFF;
601 // Set the conditional execution predicate.
602 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
605 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
607 // Encode imm16 as imm4:imm12
608 Binary |= Lo16 & 0xFFF; // Insts{11-0} = imm12
609 Binary |= ((Lo16 >> 12) & 0xF) << 16; // Insts{19-16} = imm4
612 unsigned Hi16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movt) >> 16;
613 // Emit the 'movt' instruction.
614 Binary = 0x34 << 20; // movt: Insts{27-20} = 0b00110100
616 // Set the conditional execution predicate.
617 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
620 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
622 // Encode imm16 as imm4:imm1, same as movw above.
623 Binary |= Hi16 & 0xFFF;
624 Binary |= ((Hi16 >> 12) & 0xF) << 16;
628 void ARMCodeEmitter::emitMOVi2piecesInstruction(const MachineInstr &MI) {
629 const MachineOperand &MO0 = MI.getOperand(0);
630 const MachineOperand &MO1 = MI.getOperand(1);
631 assert(MO1.isImm() && ARM_AM::isSOImmTwoPartVal(MO1.getImm()) &&
632 "Not a valid so_imm value!");
633 unsigned V1 = ARM_AM::getSOImmTwoPartFirst(MO1.getImm());
634 unsigned V2 = ARM_AM::getSOImmTwoPartSecond(MO1.getImm());
636 // Emit the 'mov' instruction.
637 unsigned Binary = 0xd << 21; // mov: Insts{24-21} = 0b1101
639 // Set the conditional execution predicate.
640 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
643 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
646 // Set bit I(25) to identify this is the immediate form of <shifter_op>
647 Binary |= 1 << ARMII::I_BitShift;
648 Binary |= getMachineSoImmOpValue(V1);
651 // Now the 'orr' instruction.
652 Binary = 0xc << 21; // orr: Insts{24-21} = 0b1100
654 // Set the conditional execution predicate.
655 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
658 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift;
661 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRnShift;
664 // Set bit I(25) to identify this is the immediate form of <shifter_op>
665 Binary |= 1 << ARMII::I_BitShift;
666 Binary |= getMachineSoImmOpValue(V2);
670 void ARMCodeEmitter::emitLEApcrelJTInstruction(const MachineInstr &MI) {
671 // It's basically add r, pc, (LJTI - $+8)
673 const TargetInstrDesc &TID = MI.getDesc();
675 // Emit the 'add' instruction.
676 unsigned Binary = 0x4 << 21; // add: Insts{24-31} = 0b0100
678 // Set the conditional execution predicate
679 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
681 // Encode S bit if MI modifies CPSR.
682 Binary |= getAddrModeSBit(MI, TID);
685 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
687 // Encode Rn which is PC.
688 Binary |= getARMRegisterNumbering(ARM::PC) << ARMII::RegRnShift;
690 // Encode the displacement.
691 Binary |= 1 << ARMII::I_BitShift;
692 emitJumpTableAddress(MI.getOperand(1).getIndex(), ARM::reloc_arm_jt_base);
697 void ARMCodeEmitter::emitPseudoMoveInstruction(const MachineInstr &MI) {
698 unsigned Opcode = MI.getDesc().Opcode;
700 // Part of binary is determined by TableGn.
701 unsigned Binary = getBinaryCodeForInstr(MI);
703 // Set the conditional execution predicate
704 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
706 // Encode S bit if MI modifies CPSR.
707 if (Opcode == ARM::MOVsrl_flag || Opcode == ARM::MOVsra_flag)
708 Binary |= 1 << ARMII::S_BitShift;
710 // Encode register def if there is one.
711 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
713 // Encode the shift operation.
720 case ARM::MOVsrl_flag:
722 Binary |= (0x2 << 4) | (1 << 7);
724 case ARM::MOVsra_flag:
726 Binary |= (0x4 << 4) | (1 << 7);
730 // Encode register Rm.
731 Binary |= getMachineOpValue(MI, 1);
736 void ARMCodeEmitter::addPCLabel(unsigned LabelID) {
737 DEBUG(errs() << " ** LPC" << LabelID << " @ "
738 << (void*)MCE.getCurrentPCValue() << '\n');
739 JTI->addPCLabelAddr(LabelID, MCE.getCurrentPCValue());
742 void ARMCodeEmitter::emitPseudoInstruction(const MachineInstr &MI) {
743 unsigned Opcode = MI.getDesc().Opcode;
746 llvm_unreachable("ARMCodeEmitter::emitPseudoInstruction");
750 case ARM::BMOVPCRXr9: {
751 // First emit mov lr, pc
752 unsigned Binary = 0x01a0e00f;
753 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
756 // and then emit the branch.
757 emitMiscBranchInstruction(MI);
760 case TargetOpcode::INLINEASM: {
761 // We allow inline assembler nodes with empty bodies - they can
762 // implicitly define registers, which is ok for JIT.
763 if (MI.getOperand(0).getSymbolName()[0]) {
764 report_fatal_error("JIT does not support inline asm!");
768 case TargetOpcode::PROLOG_LABEL:
769 case TargetOpcode::EH_LABEL:
770 MCE.emitLabel(MI.getOperand(0).getMCSymbol());
772 case TargetOpcode::IMPLICIT_DEF:
773 case TargetOpcode::KILL:
776 case ARM::CONSTPOOL_ENTRY:
777 emitConstPoolInstruction(MI);
780 // Remember of the address of the PC label for relocation later.
781 addPCLabel(MI.getOperand(2).getImm());
782 // PICADD is just an add instruction that implicitly read pc.
783 emitDataProcessingInstruction(MI, 0, ARM::PC);
790 // Remember of the address of the PC label for relocation later.
791 addPCLabel(MI.getOperand(2).getImm());
792 // These are just load / store instructions that implicitly read pc.
793 emitLoadStoreInstruction(MI, 0, ARM::PC);
800 // Remember of the address of the PC label for relocation later.
801 addPCLabel(MI.getOperand(2).getImm());
802 // These are just load / store instructions that implicitly read pc.
803 emitMiscLoadStoreInstruction(MI, ARM::PC);
808 // Two instructions to materialize a constant.
809 if (Subtarget->hasV6T2Ops())
810 emitMOVi32immInstruction(MI);
812 emitMOVi2piecesInstruction(MI);
815 case ARM::LEApcrelJT:
816 // Materialize jumptable address.
817 emitLEApcrelJTInstruction(MI);
820 case ARM::MOVsrl_flag:
821 case ARM::MOVsra_flag:
822 emitPseudoMoveInstruction(MI);
827 unsigned ARMCodeEmitter::getMachineSoRegOpValue(const MachineInstr &MI,
828 const TargetInstrDesc &TID,
829 const MachineOperand &MO,
831 unsigned Binary = getMachineOpValue(MI, MO);
833 const MachineOperand &MO1 = MI.getOperand(OpIdx + 1);
834 const MachineOperand &MO2 = MI.getOperand(OpIdx + 2);
835 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO2.getImm());
837 // Encode the shift opcode.
839 unsigned Rs = MO1.getReg();
841 // Set shift operand (bit[7:4]).
846 // RRX - 0110 and bit[11:8] clear.
848 default: llvm_unreachable("Unknown shift opc!");
849 case ARM_AM::lsl: SBits = 0x1; break;
850 case ARM_AM::lsr: SBits = 0x3; break;
851 case ARM_AM::asr: SBits = 0x5; break;
852 case ARM_AM::ror: SBits = 0x7; break;
853 case ARM_AM::rrx: SBits = 0x6; break;
856 // Set shift operand (bit[6:4]).
862 default: llvm_unreachable("Unknown shift opc!");
863 case ARM_AM::lsl: SBits = 0x0; break;
864 case ARM_AM::lsr: SBits = 0x2; break;
865 case ARM_AM::asr: SBits = 0x4; break;
866 case ARM_AM::ror: SBits = 0x6; break;
869 Binary |= SBits << 4;
870 if (SOpc == ARM_AM::rrx)
873 // Encode the shift operation Rs or shift_imm (except rrx).
875 // Encode Rs bit[11:8].
876 assert(ARM_AM::getSORegOffset(MO2.getImm()) == 0);
877 return Binary | (getARMRegisterNumbering(Rs) << ARMII::RegRsShift);
880 // Encode shift_imm bit[11:7].
881 return Binary | ARM_AM::getSORegOffset(MO2.getImm()) << 7;
884 unsigned ARMCodeEmitter::getMachineSoImmOpValue(unsigned SoImm) {
885 int SoImmVal = ARM_AM::getSOImmVal(SoImm);
886 assert(SoImmVal != -1 && "Not a valid so_imm value!");
888 // Encode rotate_imm.
889 unsigned Binary = (ARM_AM::getSOImmValRot((unsigned)SoImmVal) >> 1)
890 << ARMII::SoRotImmShift;
893 Binary |= ARM_AM::getSOImmValImm((unsigned)SoImmVal);
897 unsigned ARMCodeEmitter::getAddrModeSBit(const MachineInstr &MI,
898 const TargetInstrDesc &TID) const {
899 for (unsigned i = MI.getNumOperands(), e = TID.getNumOperands(); i != e; --i){
900 const MachineOperand &MO = MI.getOperand(i-1);
901 if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR)
902 return 1 << ARMII::S_BitShift;
907 void ARMCodeEmitter::emitDataProcessingInstruction(const MachineInstr &MI,
909 unsigned ImplicitRn) {
910 const TargetInstrDesc &TID = MI.getDesc();
912 // Part of binary is determined by TableGn.
913 unsigned Binary = getBinaryCodeForInstr(MI);
915 // Set the conditional execution predicate
916 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
918 // Encode S bit if MI modifies CPSR.
919 Binary |= getAddrModeSBit(MI, TID);
921 // Encode register def if there is one.
922 unsigned NumDefs = TID.getNumDefs();
925 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
927 // Special handling for implicit use (e.g. PC).
928 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
930 if (TID.Opcode == ARM::MOVi16) {
931 // Get immediate from MI.
932 unsigned Lo16 = getMovi32Value(MI, MI.getOperand(OpIdx),
933 ARM::reloc_arm_movw);
934 // Encode imm which is the same as in emitMOVi32immInstruction().
935 Binary |= Lo16 & 0xFFF;
936 Binary |= ((Lo16 >> 12) & 0xF) << 16;
939 } else if(TID.Opcode == ARM::MOVTi16) {
940 unsigned Hi16 = (getMovi32Value(MI, MI.getOperand(OpIdx),
941 ARM::reloc_arm_movt) >> 16);
942 Binary |= Hi16 & 0xFFF;
943 Binary |= ((Hi16 >> 12) & 0xF) << 16;
946 } else if ((TID.Opcode == ARM::BFC) || (TID.Opcode == ARM::BFI)) {
947 uint32_t v = ~MI.getOperand(2).getImm();
948 int32_t lsb = CountTrailingZeros_32(v);
949 int32_t msb = (32 - CountLeadingZeros_32(v)) - 1;
950 // Instr{20-16} = msb, Instr{11-7} = lsb
951 Binary |= (msb & 0x1F) << 16;
952 Binary |= (lsb & 0x1F) << 7;
955 } else if ((TID.Opcode == ARM::UBFX) || (TID.Opcode == ARM::SBFX)) {
956 // Encode Rn in Instr{0-3}
957 Binary |= getMachineOpValue(MI, OpIdx++);
959 uint32_t lsb = MI.getOperand(OpIdx++).getImm();
960 uint32_t widthm1 = MI.getOperand(OpIdx++).getImm() - 1;
962 // Instr{20-16} = widthm1, Instr{11-7} = lsb
963 Binary |= (widthm1 & 0x1F) << 16;
964 Binary |= (lsb & 0x1F) << 7;
969 // If this is a two-address operand, skip it. e.g. MOVCCr operand 1.
970 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
973 // Encode first non-shifter register operand if there is one.
974 bool isUnary = TID.TSFlags & ARMII::UnaryDP;
977 // Special handling for implicit use (e.g. PC).
978 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
980 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRnShift;
985 // Encode shifter operand.
986 const MachineOperand &MO = MI.getOperand(OpIdx);
987 if ((TID.TSFlags & ARMII::FormMask) == ARMII::DPSoRegFrm) {
989 emitWordLE(Binary | getMachineSoRegOpValue(MI, TID, MO, OpIdx));
994 // Encode register Rm.
995 emitWordLE(Binary | getARMRegisterNumbering(MO.getReg()));
1000 Binary |= getMachineSoImmOpValue((unsigned)MO.getImm());
1005 void ARMCodeEmitter::emitLoadStoreInstruction(const MachineInstr &MI,
1006 unsigned ImplicitRd,
1007 unsigned ImplicitRn) {
1008 const TargetInstrDesc &TID = MI.getDesc();
1009 unsigned Form = TID.TSFlags & ARMII::FormMask;
1010 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1012 // Part of binary is determined by TableGn.
1013 unsigned Binary = getBinaryCodeForInstr(MI);
1015 // If this is an LDRi12, STRi12 or LDRcp, nothing more needs be done.
1016 if (MI.getOpcode() == ARM::LDRi12 || MI.getOpcode() == ARM::LDRcp ||
1017 MI.getOpcode() == ARM::STRi12) {
1022 // Set the conditional execution predicate
1023 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1027 // Operand 0 of a pre- and post-indexed store is the address base
1028 // writeback. Skip it.
1029 bool Skipped = false;
1030 if (IsPrePost && Form == ARMII::StFrm) {
1035 // Set first operand
1037 // Special handling for implicit use (e.g. PC).
1038 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift);
1040 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1042 // Set second operand
1044 // Special handling for implicit use (e.g. PC).
1045 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1047 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1049 // If this is a two-address operand, skip it. e.g. LDR_PRE.
1050 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1053 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1054 unsigned AM2Opc = (ImplicitRn == ARM::PC)
1055 ? 0 : MI.getOperand(OpIdx+1).getImm();
1057 // Set bit U(23) according to sign of immed value (positive or negative).
1058 Binary |= ((ARM_AM::getAM2Op(AM2Opc) == ARM_AM::add ? 1 : 0) <<
1060 if (!MO2.getReg()) { // is immediate
1061 if (ARM_AM::getAM2Offset(AM2Opc))
1062 // Set the value of offset_12 field
1063 Binary |= ARM_AM::getAM2Offset(AM2Opc);
1068 // Set bit I(25), because this is not in immediate encoding.
1069 Binary |= 1 << ARMII::I_BitShift;
1070 assert(TargetRegisterInfo::isPhysicalRegister(MO2.getReg()));
1071 // Set bit[3:0] to the corresponding Rm register
1072 Binary |= getARMRegisterNumbering(MO2.getReg());
1074 // If this instr is in scaled register offset/index instruction, set
1075 // shift_immed(bit[11:7]) and shift(bit[6:5]) fields.
1076 if (unsigned ShImm = ARM_AM::getAM2Offset(AM2Opc)) {
1077 Binary |= getShiftOp(AM2Opc) << ARMII::ShiftImmShift; // shift
1078 Binary |= ShImm << ARMII::ShiftShift; // shift_immed
1084 void ARMCodeEmitter::emitMiscLoadStoreInstruction(const MachineInstr &MI,
1085 unsigned ImplicitRn) {
1086 const TargetInstrDesc &TID = MI.getDesc();
1087 unsigned Form = TID.TSFlags & ARMII::FormMask;
1088 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1090 // Part of binary is determined by TableGn.
1091 unsigned Binary = getBinaryCodeForInstr(MI);
1093 // Set the conditional execution predicate
1094 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1098 // Operand 0 of a pre- and post-indexed store is the address base
1099 // writeback. Skip it.
1100 bool Skipped = false;
1101 if (IsPrePost && Form == ARMII::StMiscFrm) {
1106 // Set first operand
1107 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1109 // Skip LDRD and STRD's second operand.
1110 if (TID.Opcode == ARM::LDRD || TID.Opcode == ARM::STRD)
1113 // Set second operand
1115 // Special handling for implicit use (e.g. PC).
1116 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift);
1118 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1120 // If this is a two-address operand, skip it. e.g. LDRH_POST.
1121 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1124 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1125 unsigned AM3Opc = (ImplicitRn == ARM::PC)
1126 ? 0 : MI.getOperand(OpIdx+1).getImm();
1128 // Set bit U(23) according to sign of immed value (positive or negative)
1129 Binary |= ((ARM_AM::getAM3Op(AM3Opc) == ARM_AM::add ? 1 : 0) <<
1132 // If this instr is in register offset/index encoding, set bit[3:0]
1133 // to the corresponding Rm register.
1135 Binary |= getARMRegisterNumbering(MO2.getReg());
1140 // This instr is in immediate offset/index encoding, set bit 22 to 1.
1141 Binary |= 1 << ARMII::AM3_I_BitShift;
1142 if (unsigned ImmOffs = ARM_AM::getAM3Offset(AM3Opc)) {
1144 Binary |= (ImmOffs >> 4) << ARMII::ImmHiShift; // immedH
1145 Binary |= (ImmOffs & 0xF); // immedL
1151 static unsigned getAddrModeUPBits(unsigned Mode) {
1152 unsigned Binary = 0;
1154 // Set addressing mode by modifying bits U(23) and P(24)
1155 // IA - Increment after - bit U = 1 and bit P = 0
1156 // IB - Increment before - bit U = 1 and bit P = 1
1157 // DA - Decrement after - bit U = 0 and bit P = 0
1158 // DB - Decrement before - bit U = 0 and bit P = 1
1160 default: llvm_unreachable("Unknown addressing sub-mode!");
1161 case ARM_AM::da: break;
1162 case ARM_AM::db: Binary |= 0x1 << ARMII::P_BitShift; break;
1163 case ARM_AM::ia: Binary |= 0x1 << ARMII::U_BitShift; break;
1164 case ARM_AM::ib: Binary |= 0x3 << ARMII::U_BitShift; break;
1170 void ARMCodeEmitter::emitLoadStoreMultipleInstruction(const MachineInstr &MI) {
1171 const TargetInstrDesc &TID = MI.getDesc();
1172 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1174 // Part of binary is determined by TableGn.
1175 unsigned Binary = getBinaryCodeForInstr(MI);
1177 // Set the conditional execution predicate
1178 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1180 // Skip operand 0 of an instruction with base register update.
1185 // Set base address operand
1186 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1188 // Set addressing mode by modifying bits U(23) and P(24)
1189 const MachineOperand &MO = MI.getOperand(OpIdx++);
1190 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(MO.getImm()));
1194 Binary |= 0x1 << ARMII::W_BitShift;
1197 for (unsigned i = OpIdx+2, e = MI.getNumOperands(); i != e; ++i) {
1198 const MachineOperand &MO = MI.getOperand(i);
1199 if (!MO.isReg() || MO.isImplicit())
1201 unsigned RegNum = getARMRegisterNumbering(MO.getReg());
1202 assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
1204 Binary |= 0x1 << RegNum;
1210 void ARMCodeEmitter::emitMulFrmInstruction(const MachineInstr &MI) {
1211 const TargetInstrDesc &TID = MI.getDesc();
1213 // Part of binary is determined by TableGn.
1214 unsigned Binary = getBinaryCodeForInstr(MI);
1216 // Set the conditional execution predicate
1217 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1219 // Encode S bit if MI modifies CPSR.
1220 Binary |= getAddrModeSBit(MI, TID);
1222 // 32x32->64bit operations have two destination registers. The number
1223 // of register definitions will tell us if that's what we're dealing with.
1225 if (TID.getNumDefs() == 2)
1226 Binary |= getMachineOpValue (MI, OpIdx++) << ARMII::RegRdLoShift;
1229 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdHiShift;
1232 Binary |= getMachineOpValue(MI, OpIdx++);
1235 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRsShift;
1237 // Many multiple instructions (e.g. MLA) have three src operands. Encode
1238 // it as Rn (for multiply, that's in the same offset as RdLo.
1239 if (TID.getNumOperands() > OpIdx &&
1240 !TID.OpInfo[OpIdx].isPredicate() &&
1241 !TID.OpInfo[OpIdx].isOptionalDef())
1242 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRdLoShift;
1247 void ARMCodeEmitter::emitExtendInstruction(const MachineInstr &MI) {
1248 const TargetInstrDesc &TID = MI.getDesc();
1250 // Part of binary is determined by TableGn.
1251 unsigned Binary = getBinaryCodeForInstr(MI);
1253 // Set the conditional execution predicate
1254 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1259 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1261 const MachineOperand &MO1 = MI.getOperand(OpIdx++);
1262 const MachineOperand &MO2 = MI.getOperand(OpIdx);
1264 // Two register operand form.
1266 Binary |= getMachineOpValue(MI, MO1) << ARMII::RegRnShift;
1269 Binary |= getMachineOpValue(MI, MO2);
1272 Binary |= getMachineOpValue(MI, MO1);
1275 // Encode rot imm (0, 8, 16, or 24) if it has a rotate immediate operand.
1276 if (MI.getOperand(OpIdx).isImm() &&
1277 !TID.OpInfo[OpIdx].isPredicate() &&
1278 !TID.OpInfo[OpIdx].isOptionalDef())
1279 Binary |= (getMachineOpValue(MI, OpIdx) / 8) << ARMII::ExtRotImmShift;
1284 void ARMCodeEmitter::emitMiscArithInstruction(const MachineInstr &MI) {
1285 const TargetInstrDesc &TID = MI.getDesc();
1287 // Part of binary is determined by TableGn.
1288 unsigned Binary = getBinaryCodeForInstr(MI);
1290 // Set the conditional execution predicate
1291 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1296 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift;
1298 const MachineOperand &MO = MI.getOperand(OpIdx++);
1299 if (OpIdx == TID.getNumOperands() ||
1300 TID.OpInfo[OpIdx].isPredicate() ||
1301 TID.OpInfo[OpIdx].isOptionalDef()) {
1302 // Encode Rm and it's done.
1303 Binary |= getMachineOpValue(MI, MO);
1309 Binary |= getMachineOpValue(MI, MO) << ARMII::RegRnShift;
1312 Binary |= getMachineOpValue(MI, OpIdx++);
1314 // Encode shift_imm.
1315 unsigned ShiftAmt = MI.getOperand(OpIdx).getImm();
1316 if (TID.Opcode == ARM::PKHTB) {
1317 assert(ShiftAmt != 0 && "PKHTB shift_imm is 0!");
1321 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1322 Binary |= ShiftAmt << ARMII::ShiftShift;
1327 void ARMCodeEmitter::emitSaturateInstruction(const MachineInstr &MI) {
1328 const TargetInstrDesc &TID = MI.getDesc();
1330 // Part of binary is determined by TableGen.
1331 unsigned Binary = getBinaryCodeForInstr(MI);
1333 // Set the conditional execution predicate
1334 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1337 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
1339 // Encode saturate bit position.
1340 unsigned Pos = MI.getOperand(1).getImm();
1341 if (TID.Opcode == ARM::SSAT || TID.Opcode == ARM::SSAT16)
1343 assert((Pos < 16 || (Pos < 32 &&
1344 TID.Opcode != ARM::SSAT16 &&
1345 TID.Opcode != ARM::USAT16)) &&
1346 "saturate bit position out of range");
1347 Binary |= Pos << 16;
1350 Binary |= getMachineOpValue(MI, 2);
1352 // Encode shift_imm.
1353 if (TID.getNumOperands() == 4) {
1354 unsigned ShiftOp = MI.getOperand(3).getImm();
1355 ARM_AM::ShiftOpc Opc = ARM_AM::getSORegShOp(ShiftOp);
1356 if (Opc == ARM_AM::asr)
1358 unsigned ShiftAmt = MI.getOperand(3).getImm();
1359 if (ShiftAmt == 32 && Opc == ARM_AM::asr)
1361 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!");
1362 Binary |= ShiftAmt << ARMII::ShiftShift;
1368 void ARMCodeEmitter::emitBranchInstruction(const MachineInstr &MI) {
1369 const TargetInstrDesc &TID = MI.getDesc();
1371 if (TID.Opcode == ARM::TPsoft) {
1372 llvm_unreachable("ARM::TPsoft FIXME"); // FIXME
1375 // Part of binary is determined by TableGn.
1376 unsigned Binary = getBinaryCodeForInstr(MI);
1378 // Set the conditional execution predicate
1379 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1381 // Set signed_immed_24 field
1382 Binary |= getMachineOpValue(MI, 0);
1387 void ARMCodeEmitter::emitInlineJumpTable(unsigned JTIndex) {
1388 // Remember the base address of the inline jump table.
1389 uintptr_t JTBase = MCE.getCurrentPCValue();
1390 JTI->addJumpTableBaseAddr(JTIndex, JTBase);
1391 DEBUG(errs() << " ** Jump Table #" << JTIndex << " @ " << (void*)JTBase
1394 // Now emit the jump table entries.
1395 const std::vector<MachineBasicBlock*> &MBBs = (*MJTEs)[JTIndex].MBBs;
1396 for (unsigned i = 0, e = MBBs.size(); i != e; ++i) {
1398 // DestBB address - JT base.
1399 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_pic_jt, JTBase);
1401 // Absolute DestBB address.
1402 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_absolute);
1407 void ARMCodeEmitter::emitMiscBranchInstruction(const MachineInstr &MI) {
1408 const TargetInstrDesc &TID = MI.getDesc();
1410 // Handle jump tables.
1411 if (TID.Opcode == ARM::BR_JTr || TID.Opcode == ARM::BR_JTadd) {
1412 // First emit a ldr pc, [] instruction.
1413 emitDataProcessingInstruction(MI, ARM::PC);
1415 // Then emit the inline jump table.
1417 (TID.Opcode == ARM::BR_JTr)
1418 ? MI.getOperand(1).getIndex() : MI.getOperand(2).getIndex();
1419 emitInlineJumpTable(JTIndex);
1421 } else if (TID.Opcode == ARM::BR_JTm) {
1422 // First emit a ldr pc, [] instruction.
1423 emitLoadStoreInstruction(MI, ARM::PC);
1425 // Then emit the inline jump table.
1426 emitInlineJumpTable(MI.getOperand(3).getIndex());
1430 // Part of binary is determined by TableGn.
1431 unsigned Binary = getBinaryCodeForInstr(MI);
1433 // Set the conditional execution predicate
1434 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1436 if (TID.Opcode == ARM::BX_RET || TID.Opcode == ARM::MOVPCLR)
1437 // The return register is LR.
1438 Binary |= getARMRegisterNumbering(ARM::LR);
1440 // otherwise, set the return register
1441 Binary |= getMachineOpValue(MI, 0);
1446 static unsigned encodeVFPRd(const MachineInstr &MI, unsigned OpIdx) {
1447 unsigned RegD = MI.getOperand(OpIdx).getReg();
1448 unsigned Binary = 0;
1449 bool isSPVFP = ARM::SPRRegisterClass->contains(RegD);
1450 RegD = getARMRegisterNumbering(RegD);
1452 Binary |= RegD << ARMII::RegRdShift;
1454 Binary |= ((RegD & 0x1E) >> 1) << ARMII::RegRdShift;
1455 Binary |= (RegD & 0x01) << ARMII::D_BitShift;
1460 static unsigned encodeVFPRn(const MachineInstr &MI, unsigned OpIdx) {
1461 unsigned RegN = MI.getOperand(OpIdx).getReg();
1462 unsigned Binary = 0;
1463 bool isSPVFP = ARM::SPRRegisterClass->contains(RegN);
1464 RegN = getARMRegisterNumbering(RegN);
1466 Binary |= RegN << ARMII::RegRnShift;
1468 Binary |= ((RegN & 0x1E) >> 1) << ARMII::RegRnShift;
1469 Binary |= (RegN & 0x01) << ARMII::N_BitShift;
1474 static unsigned encodeVFPRm(const MachineInstr &MI, unsigned OpIdx) {
1475 unsigned RegM = MI.getOperand(OpIdx).getReg();
1476 unsigned Binary = 0;
1477 bool isSPVFP = ARM::SPRRegisterClass->contains(RegM);
1478 RegM = getARMRegisterNumbering(RegM);
1482 Binary |= ((RegM & 0x1E) >> 1);
1483 Binary |= (RegM & 0x01) << ARMII::M_BitShift;
1488 void ARMCodeEmitter::emitVFPArithInstruction(const MachineInstr &MI) {
1489 const TargetInstrDesc &TID = MI.getDesc();
1491 // Part of binary is determined by TableGn.
1492 unsigned Binary = getBinaryCodeForInstr(MI);
1494 // Set the conditional execution predicate
1495 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1498 assert((Binary & ARMII::D_BitShift) == 0 &&
1499 (Binary & ARMII::N_BitShift) == 0 &&
1500 (Binary & ARMII::M_BitShift) == 0 && "VFP encoding bug!");
1503 Binary |= encodeVFPRd(MI, OpIdx++);
1505 // If this is a two-address operand, skip it, e.g. FMACD.
1506 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1510 if ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPBinaryFrm)
1511 Binary |= encodeVFPRn(MI, OpIdx++);
1513 if (OpIdx == TID.getNumOperands() ||
1514 TID.OpInfo[OpIdx].isPredicate() ||
1515 TID.OpInfo[OpIdx].isOptionalDef()) {
1516 // FCMPEZD etc. has only one operand.
1522 Binary |= encodeVFPRm(MI, OpIdx);
1527 void ARMCodeEmitter::emitVFPConversionInstruction(const MachineInstr &MI) {
1528 const TargetInstrDesc &TID = MI.getDesc();
1529 unsigned Form = TID.TSFlags & ARMII::FormMask;
1531 // Part of binary is determined by TableGn.
1532 unsigned Binary = getBinaryCodeForInstr(MI);
1534 // Set the conditional execution predicate
1535 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1539 case ARMII::VFPConv1Frm:
1540 case ARMII::VFPConv2Frm:
1541 case ARMII::VFPConv3Frm:
1543 Binary |= encodeVFPRd(MI, 0);
1545 case ARMII::VFPConv4Frm:
1547 Binary |= encodeVFPRn(MI, 0);
1549 case ARMII::VFPConv5Frm:
1551 Binary |= encodeVFPRm(MI, 0);
1557 case ARMII::VFPConv1Frm:
1559 Binary |= encodeVFPRm(MI, 1);
1561 case ARMII::VFPConv2Frm:
1562 case ARMII::VFPConv3Frm:
1564 Binary |= encodeVFPRn(MI, 1);
1566 case ARMII::VFPConv4Frm:
1567 case ARMII::VFPConv5Frm:
1569 Binary |= encodeVFPRd(MI, 1);
1573 if (Form == ARMII::VFPConv5Frm)
1575 Binary |= encodeVFPRn(MI, 2);
1576 else if (Form == ARMII::VFPConv3Frm)
1578 Binary |= encodeVFPRm(MI, 2);
1583 void ARMCodeEmitter::emitVFPLoadStoreInstruction(const MachineInstr &MI) {
1584 // Part of binary is determined by TableGn.
1585 unsigned Binary = getBinaryCodeForInstr(MI);
1587 // Set the conditional execution predicate
1588 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1593 Binary |= encodeVFPRd(MI, OpIdx++);
1595 // Encode address base.
1596 const MachineOperand &Base = MI.getOperand(OpIdx++);
1597 Binary |= getMachineOpValue(MI, Base) << ARMII::RegRnShift;
1599 // If there is a non-zero immediate offset, encode it.
1601 const MachineOperand &Offset = MI.getOperand(OpIdx);
1602 if (unsigned ImmOffs = ARM_AM::getAM5Offset(Offset.getImm())) {
1603 if (ARM_AM::getAM5Op(Offset.getImm()) == ARM_AM::add)
1604 Binary |= 1 << ARMII::U_BitShift;
1611 // If immediate offset is omitted, default to +0.
1612 Binary |= 1 << ARMII::U_BitShift;
1618 ARMCodeEmitter::emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI) {
1619 const TargetInstrDesc &TID = MI.getDesc();
1620 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0;
1622 // Part of binary is determined by TableGn.
1623 unsigned Binary = getBinaryCodeForInstr(MI);
1625 // Set the conditional execution predicate
1626 Binary |= II->getPredicate(&MI) << ARMII::CondShift;
1628 // Skip operand 0 of an instruction with base register update.
1633 // Set base address operand
1634 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
1636 // Set addressing mode by modifying bits U(23) and P(24)
1637 const MachineOperand &MO = MI.getOperand(OpIdx++);
1638 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(MO.getImm()));
1642 Binary |= 0x1 << ARMII::W_BitShift;
1644 // First register is encoded in Dd.
1645 Binary |= encodeVFPRd(MI, OpIdx+2);
1647 // Count the number of registers.
1648 unsigned NumRegs = 1;
1649 for (unsigned i = OpIdx+3, e = MI.getNumOperands(); i != e; ++i) {
1650 const MachineOperand &MO = MI.getOperand(i);
1651 if (!MO.isReg() || MO.isImplicit())
1655 // Bit 8 will be set if <list> is consecutive 64-bit registers (e.g., D0)
1656 // Otherwise, it will be 0, in the case of 32-bit registers.
1658 Binary |= NumRegs * 2;
1665 static unsigned encodeNEONRd(const MachineInstr &MI, unsigned OpIdx) {
1666 unsigned RegD = MI.getOperand(OpIdx).getReg();
1667 unsigned Binary = 0;
1668 RegD = getARMRegisterNumbering(RegD);
1669 Binary |= (RegD & 0xf) << ARMII::RegRdShift;
1670 Binary |= ((RegD >> 4) & 1) << ARMII::D_BitShift;
1674 static unsigned encodeNEONRn(const MachineInstr &MI, unsigned OpIdx) {
1675 unsigned RegN = MI.getOperand(OpIdx).getReg();
1676 unsigned Binary = 0;
1677 RegN = getARMRegisterNumbering(RegN);
1678 Binary |= (RegN & 0xf) << ARMII::RegRnShift;
1679 Binary |= ((RegN >> 4) & 1) << ARMII::N_BitShift;
1683 static unsigned encodeNEONRm(const MachineInstr &MI, unsigned OpIdx) {
1684 unsigned RegM = MI.getOperand(OpIdx).getReg();
1685 unsigned Binary = 0;
1686 RegM = getARMRegisterNumbering(RegM);
1687 Binary |= (RegM & 0xf);
1688 Binary |= ((RegM >> 4) & 1) << ARMII::M_BitShift;
1692 /// convertNEONDataProcToThumb - Convert the ARM mode encoding for a NEON
1693 /// data-processing instruction to the corresponding Thumb encoding.
1694 static unsigned convertNEONDataProcToThumb(unsigned Binary) {
1695 assert((Binary & 0xfe000000) == 0xf2000000 &&
1696 "not an ARM NEON data-processing instruction");
1697 unsigned UBit = (Binary >> 24) & 1;
1698 return 0xef000000 | (UBit << 28) | (Binary & 0xffffff);
1701 void ARMCodeEmitter::emitNEONLaneInstruction(const MachineInstr &MI) {
1702 unsigned Binary = getBinaryCodeForInstr(MI);
1704 unsigned RegTOpIdx, RegNOpIdx, LnOpIdx;
1705 const TargetInstrDesc &TID = MI.getDesc();
1706 if ((TID.TSFlags & ARMII::FormMask) == ARMII::NGetLnFrm) {
1710 } else { // ARMII::NSetLnFrm
1716 // Set the conditional execution predicate
1717 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1719 unsigned RegT = MI.getOperand(RegTOpIdx).getReg();
1720 RegT = getARMRegisterNumbering(RegT);
1721 Binary |= (RegT << ARMII::RegRdShift);
1722 Binary |= encodeNEONRn(MI, RegNOpIdx);
1725 if ((Binary & (1 << 22)) != 0)
1726 LaneShift = 0; // 8-bit elements
1727 else if ((Binary & (1 << 5)) != 0)
1728 LaneShift = 1; // 16-bit elements
1730 LaneShift = 2; // 32-bit elements
1732 unsigned Lane = MI.getOperand(LnOpIdx).getImm() << LaneShift;
1733 unsigned Opc1 = Lane >> 2;
1734 unsigned Opc2 = Lane & 3;
1735 assert((Opc1 & 3) == 0 && "out-of-range lane number operand");
1736 Binary |= (Opc1 << 21);
1737 Binary |= (Opc2 << 5);
1742 void ARMCodeEmitter::emitNEONDupInstruction(const MachineInstr &MI) {
1743 unsigned Binary = getBinaryCodeForInstr(MI);
1745 // Set the conditional execution predicate
1746 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift;
1748 unsigned RegT = MI.getOperand(1).getReg();
1749 RegT = getARMRegisterNumbering(RegT);
1750 Binary |= (RegT << ARMII::RegRdShift);
1751 Binary |= encodeNEONRn(MI, 0);
1755 void ARMCodeEmitter::emitNEON1RegModImmInstruction(const MachineInstr &MI) {
1756 unsigned Binary = getBinaryCodeForInstr(MI);
1757 // Destination register is encoded in Dd.
1758 Binary |= encodeNEONRd(MI, 0);
1759 // Immediate fields: Op, Cmode, I, Imm3, Imm4
1760 unsigned Imm = MI.getOperand(1).getImm();
1761 unsigned Op = (Imm >> 12) & 1;
1762 unsigned Cmode = (Imm >> 8) & 0xf;
1763 unsigned I = (Imm >> 7) & 1;
1764 unsigned Imm3 = (Imm >> 4) & 0x7;
1765 unsigned Imm4 = Imm & 0xf;
1766 Binary |= (I << 24) | (Imm3 << 16) | (Cmode << 8) | (Op << 5) | Imm4;
1768 Binary = convertNEONDataProcToThumb(Binary);
1772 void ARMCodeEmitter::emitNEON2RegInstruction(const MachineInstr &MI) {
1773 const TargetInstrDesc &TID = MI.getDesc();
1774 unsigned Binary = getBinaryCodeForInstr(MI);
1775 // Destination register is encoded in Dd; source register in Dm.
1777 Binary |= encodeNEONRd(MI, OpIdx++);
1778 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1780 Binary |= encodeNEONRm(MI, OpIdx);
1782 Binary = convertNEONDataProcToThumb(Binary);
1783 // FIXME: This does not handle VDUPfdf or VDUPfqf.
1787 void ARMCodeEmitter::emitNEON3RegInstruction(const MachineInstr &MI) {
1788 const TargetInstrDesc &TID = MI.getDesc();
1789 unsigned Binary = getBinaryCodeForInstr(MI);
1790 // Destination register is encoded in Dd; source registers in Dn and Dm.
1792 Binary |= encodeNEONRd(MI, OpIdx++);
1793 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1795 Binary |= encodeNEONRn(MI, OpIdx++);
1796 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
1798 Binary |= encodeNEONRm(MI, OpIdx);
1800 Binary = convertNEONDataProcToThumb(Binary);
1801 // FIXME: This does not handle VMOVDneon or VMOVQ.
1805 #include "ARMGenCodeEmitter.inc"