ARMCodeEmitter.cpp revision c4bc2111a75dc1ba2383a7021dc95750b3398efe
1//===-- ARM/ARMCodeEmitter.cpp - Convert ARM code to machine code ---------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file contains the pass that transforms the ARM machine instructions into 11// relocatable machine code. 12// 13//===----------------------------------------------------------------------===// 14 15#define DEBUG_TYPE "jit" 16#include "ARM.h" 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" 38#ifndef NDEBUG 39#include <iomanip> 40#endif 41using namespace llvm; 42 43STATISTIC(NumEmitted, "Number of machine instructions emitted"); 44 45namespace { 46 47 class ARMCodeEmitter : public MachineFunctionPass { 48 ARMJITInfo *JTI; 49 const ARMInstrInfo *II; 50 const TargetData *TD; 51 const ARMSubtarget *Subtarget; 52 TargetMachine &TM; 53 JITCodeEmitter &MCE; 54 MachineModuleInfo *MMI; 55 const std::vector<MachineConstantPoolEntry> *MCPEs; 56 const std::vector<MachineJumpTableEntry> *MJTEs; 57 bool IsPIC; 58 bool IsThumb; 59 60 void getAnalysisUsage(AnalysisUsage &AU) const { 61 AU.addRequired<MachineModuleInfo>(); 62 MachineFunctionPass::getAnalysisUsage(AU); 63 } 64 65 static char ID; 66 public: 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) {} 73 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; 78 79 bool runOnMachineFunction(MachineFunction &MF); 80 81 virtual const char *getPassName() const { 82 return "ARM Machine Code Emitter"; 83 } 84 85 void emitInstruction(const MachineInstr &MI); 86 87 private: 88 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, 101 unsigned OpIdx); 102 103 unsigned getMachineSoImmOpValue(unsigned SoImm); 104 105 unsigned getAddrModeSBit(const MachineInstr &MI, 106 const TargetInstrDesc &TID) const; 107 108 void emitDataProcessingInstruction(const MachineInstr &MI, 109 unsigned ImplicitRd = 0, 110 unsigned ImplicitRn = 0); 111 112 void emitLoadStoreInstruction(const MachineInstr &MI, 113 unsigned ImplicitRd = 0, 114 unsigned ImplicitRn = 0); 115 116 void emitMiscLoadStoreInstruction(const MachineInstr &MI, 117 unsigned ImplicitRn = 0); 118 119 void emitLoadStoreMultipleInstruction(const MachineInstr &MI); 120 121 void emitMulFrmInstruction(const MachineInstr &MI); 122 123 void emitExtendInstruction(const MachineInstr &MI); 124 125 void emitMiscArithInstruction(const MachineInstr &MI); 126 127 void emitSaturateInstruction(const MachineInstr &MI); 128 129 void emitBranchInstruction(const MachineInstr &MI); 130 131 void emitInlineJumpTable(unsigned JTIndex); 132 133 void emitMiscBranchInstruction(const MachineInstr &MI); 134 135 void emitVFPArithInstruction(const MachineInstr &MI); 136 137 void emitVFPConversionInstruction(const MachineInstr &MI); 138 139 void emitVFPLoadStoreInstruction(const MachineInstr &MI); 140 141 void emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI); 142 143 void emitNEONLaneInstruction(const MachineInstr &MI); 144 void emitNEONDupInstruction(const MachineInstr &MI); 145 void emitNEON1RegModImmInstruction(const MachineInstr &MI); 146 void emitNEON2RegInstruction(const MachineInstr &MI); 147 void emitNEON3RegInstruction(const MachineInstr &MI); 148 149 /// getMachineOpValue - Return binary encoding of operand. If the machine 150 /// operand requires relocation, record the relocation and return zero. 151 unsigned getMachineOpValue(const MachineInstr &MI, 152 const MachineOperand &MO) const; 153 unsigned getMachineOpValue(const MachineInstr &MI, unsigned OpIdx) const { 154 return getMachineOpValue(MI, MI.getOperand(OpIdx)); 155 } 156 157 // FIXME: The legacy JIT ARMCodeEmitter doesn't rely on the the 158 // TableGen'erated getBinaryCodeForInstr() function to encode any 159 // operand values, instead querying getMachineOpValue() directly for 160 // each operand it needs to encode. Thus, any of the new encoder 161 // helper functions can simply return 0 as the values the return 162 // are already handled elsewhere. They are placeholders to allow this 163 // encoder to continue to function until the MC encoder is sufficiently 164 // far along that this one can be eliminated entirely. 165 unsigned getCCOutOpValue(const MachineInstr &MI, unsigned Op) 166 const { return 0; } 167 unsigned getSOImmOpValue(const MachineInstr &MI, unsigned Op) 168 const { return 0; } 169 unsigned getSORegOpValue(const MachineInstr &MI, unsigned Op) 170 const { return 0; } 171 unsigned getRotImmOpValue(const MachineInstr &MI, unsigned Op) 172 const { return 0; } 173 unsigned getImmMinusOneOpValue(const MachineInstr &MI, unsigned Op) 174 const { return 0; } 175 unsigned getBitfieldInvertedMaskOpValue(const MachineInstr &MI, 176 unsigned Op) const { return 0; } 177 unsigned getAddrModeImm12OpValue(const MachineInstr &MI, unsigned Op) 178 const { 179 // {17-13} = reg 180 // {12} = (U)nsigned (add == '1', sub == '0') 181 // {11-0} = imm12 182 const MachineOperand &MO = MI.getOperand(Op); 183 const MachineOperand &MO1 = MI.getOperand(Op + 1); 184 if (!MO.isReg()) { 185 emitConstPoolAddress(MO.getIndex(), ARM::reloc_arm_cp_entry); 186 return 0; 187 } 188 unsigned Reg = getARMRegisterNumbering(MO.getReg()); 189 int32_t Imm12 = MO1.getImm(); 190 uint32_t Binary; 191 Binary = Imm12 & 0xfff; 192 if (Imm12 >= 0) 193 Binary |= (1 << 12); 194 Binary |= (Reg << 13); 195 return Binary; 196 } 197 unsigned getNEONVcvtImm32OpValue(const MachineInstr &MI, unsigned Op) 198 const { return 0; } 199 200 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the 201 /// machine operand requires relocation, record the relocation and return 202 /// zero. 203 unsigned getMovi32Value(const MachineInstr &MI,const MachineOperand &MO, 204 unsigned Reloc); 205 206 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value. 207 /// 208 unsigned getShiftOp(unsigned Imm) const ; 209 210 /// Routines that handle operands which add machine relocations which are 211 /// fixed up by the relocation stage. 212 void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc, 213 bool MayNeedFarStub, bool Indirect, 214 intptr_t ACPV = 0) const; 215 void emitExternalSymbolAddress(const char *ES, unsigned Reloc) const; 216 void emitConstPoolAddress(unsigned CPI, unsigned Reloc) const; 217 void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const; 218 void emitMachineBasicBlock(MachineBasicBlock *BB, unsigned Reloc, 219 intptr_t JTBase = 0) const; 220 }; 221} 222 223char ARMCodeEmitter::ID = 0; 224 225/// createARMJITCodeEmitterPass - Return a pass that emits the collected ARM 226/// code to the specified MCE object. 227FunctionPass *llvm::createARMJITCodeEmitterPass(ARMBaseTargetMachine &TM, 228 JITCodeEmitter &JCE) { 229 return new ARMCodeEmitter(TM, JCE); 230} 231 232bool ARMCodeEmitter::runOnMachineFunction(MachineFunction &MF) { 233 assert((MF.getTarget().getRelocationModel() != Reloc::Default || 234 MF.getTarget().getRelocationModel() != Reloc::Static) && 235 "JIT relocation model must be set to static or default!"); 236 JTI = ((ARMTargetMachine &)MF.getTarget()).getJITInfo(); 237 II = ((const ARMTargetMachine &)MF.getTarget()).getInstrInfo(); 238 TD = ((const ARMTargetMachine &)MF.getTarget()).getTargetData(); 239 Subtarget = &TM.getSubtarget<ARMSubtarget>(); 240 MCPEs = &MF.getConstantPool()->getConstants(); 241 MJTEs = 0; 242 if (MF.getJumpTableInfo()) MJTEs = &MF.getJumpTableInfo()->getJumpTables(); 243 IsPIC = TM.getRelocationModel() == Reloc::PIC_; 244 IsThumb = MF.getInfo<ARMFunctionInfo>()->isThumbFunction(); 245 JTI->Initialize(MF, IsPIC); 246 MMI = &getAnalysis<MachineModuleInfo>(); 247 MCE.setModuleInfo(MMI); 248 249 do { 250 DEBUG(errs() << "JITTing function '" 251 << MF.getFunction()->getName() << "'\n"); 252 MCE.startFunction(MF); 253 for (MachineFunction::iterator MBB = MF.begin(), E = MF.end(); 254 MBB != E; ++MBB) { 255 MCE.StartMachineBasicBlock(MBB); 256 for (MachineBasicBlock::const_iterator I = MBB->begin(), E = MBB->end(); 257 I != E; ++I) 258 emitInstruction(*I); 259 } 260 } while (MCE.finishFunction(MF)); 261 262 return false; 263} 264 265/// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value. 266/// 267unsigned ARMCodeEmitter::getShiftOp(unsigned Imm) const { 268 switch (ARM_AM::getAM2ShiftOpc(Imm)) { 269 default: llvm_unreachable("Unknown shift opc!"); 270 case ARM_AM::asr: return 2; 271 case ARM_AM::lsl: return 0; 272 case ARM_AM::lsr: return 1; 273 case ARM_AM::ror: 274 case ARM_AM::rrx: return 3; 275 } 276 return 0; 277} 278 279/// getMovi32Value - Return binary encoding of operand for movw/movt. If the 280/// machine operand requires relocation, record the relocation and return zero. 281unsigned ARMCodeEmitter::getMovi32Value(const MachineInstr &MI, 282 const MachineOperand &MO, 283 unsigned Reloc) { 284 assert(((Reloc == ARM::reloc_arm_movt) || (Reloc == ARM::reloc_arm_movw)) 285 && "Relocation to this function should be for movt or movw"); 286 287 if (MO.isImm()) 288 return static_cast<unsigned>(MO.getImm()); 289 else if (MO.isGlobal()) 290 emitGlobalAddress(MO.getGlobal(), Reloc, true, false); 291 else if (MO.isSymbol()) 292 emitExternalSymbolAddress(MO.getSymbolName(), Reloc); 293 else if (MO.isMBB()) 294 emitMachineBasicBlock(MO.getMBB(), Reloc); 295 else { 296#ifndef NDEBUG 297 errs() << MO; 298#endif 299 llvm_unreachable("Unsupported operand type for movw/movt"); 300 } 301 return 0; 302} 303 304/// getMachineOpValue - Return binary encoding of operand. If the machine 305/// operand requires relocation, record the relocation and return zero. 306unsigned ARMCodeEmitter::getMachineOpValue(const MachineInstr &MI, 307 const MachineOperand &MO) const { 308 if (MO.isReg()) 309 return getARMRegisterNumbering(MO.getReg()); 310 else if (MO.isImm()) 311 return static_cast<unsigned>(MO.getImm()); 312 else if (MO.isGlobal()) 313 emitGlobalAddress(MO.getGlobal(), ARM::reloc_arm_branch, true, false); 314 else if (MO.isSymbol()) 315 emitExternalSymbolAddress(MO.getSymbolName(), ARM::reloc_arm_branch); 316 else if (MO.isCPI()) { 317 const TargetInstrDesc &TID = MI.getDesc(); 318 // For VFP load, the immediate offset is multiplied by 4. 319 unsigned Reloc = ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPLdStFrm) 320 ? ARM::reloc_arm_vfp_cp_entry : ARM::reloc_arm_cp_entry; 321 emitConstPoolAddress(MO.getIndex(), Reloc); 322 } else if (MO.isJTI()) 323 emitJumpTableAddress(MO.getIndex(), ARM::reloc_arm_relative); 324 else if (MO.isMBB()) 325 emitMachineBasicBlock(MO.getMBB(), ARM::reloc_arm_branch); 326 else { 327#ifndef NDEBUG 328 errs() << MO; 329#endif 330 llvm_unreachable(0); 331 } 332 return 0; 333} 334 335/// emitGlobalAddress - Emit the specified address to the code stream. 336/// 337void ARMCodeEmitter::emitGlobalAddress(const GlobalValue *GV, unsigned Reloc, 338 bool MayNeedFarStub, bool Indirect, 339 intptr_t ACPV) const { 340 MachineRelocation MR = Indirect 341 ? MachineRelocation::getIndirectSymbol(MCE.getCurrentPCOffset(), Reloc, 342 const_cast<GlobalValue *>(GV), 343 ACPV, MayNeedFarStub) 344 : MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc, 345 const_cast<GlobalValue *>(GV), ACPV, 346 MayNeedFarStub); 347 MCE.addRelocation(MR); 348} 349 350/// emitExternalSymbolAddress - Arrange for the address of an external symbol to 351/// be emitted to the current location in the function, and allow it to be PC 352/// relative. 353void ARMCodeEmitter:: 354emitExternalSymbolAddress(const char *ES, unsigned Reloc) const { 355 MCE.addRelocation(MachineRelocation::getExtSym(MCE.getCurrentPCOffset(), 356 Reloc, ES)); 357} 358 359/// emitConstPoolAddress - Arrange for the address of an constant pool 360/// to be emitted to the current location in the function, and allow it to be PC 361/// relative. 362void ARMCodeEmitter::emitConstPoolAddress(unsigned CPI, unsigned Reloc) const { 363 // Tell JIT emitter we'll resolve the address. 364 MCE.addRelocation(MachineRelocation::getConstPool(MCE.getCurrentPCOffset(), 365 Reloc, CPI, 0, true)); 366} 367 368/// emitJumpTableAddress - Arrange for the address of a jump table to 369/// be emitted to the current location in the function, and allow it to be PC 370/// relative. 371void ARMCodeEmitter:: 372emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const { 373 MCE.addRelocation(MachineRelocation::getJumpTable(MCE.getCurrentPCOffset(), 374 Reloc, JTIndex, 0, true)); 375} 376 377/// emitMachineBasicBlock - Emit the specified address basic block. 378void ARMCodeEmitter::emitMachineBasicBlock(MachineBasicBlock *BB, 379 unsigned Reloc, 380 intptr_t JTBase) const { 381 MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(), 382 Reloc, BB, JTBase)); 383} 384 385void ARMCodeEmitter::emitWordLE(unsigned Binary) { 386 DEBUG(errs() << " 0x"; 387 errs().write_hex(Binary) << "\n"); 388 MCE.emitWordLE(Binary); 389} 390 391void ARMCodeEmitter::emitDWordLE(uint64_t Binary) { 392 DEBUG(errs() << " 0x"; 393 errs().write_hex(Binary) << "\n"); 394 MCE.emitDWordLE(Binary); 395} 396 397void ARMCodeEmitter::emitInstruction(const MachineInstr &MI) { 398 DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << MI); 399 400 MCE.processDebugLoc(MI.getDebugLoc(), true); 401 402 ++NumEmitted; // Keep track of the # of mi's emitted 403 switch (MI.getDesc().TSFlags & ARMII::FormMask) { 404 default: { 405 llvm_unreachable("Unhandled instruction encoding format!"); 406 break; 407 } 408 case ARMII::Pseudo: 409 emitPseudoInstruction(MI); 410 break; 411 case ARMII::DPFrm: 412 case ARMII::DPSoRegFrm: 413 emitDataProcessingInstruction(MI); 414 break; 415 case ARMII::LdFrm: 416 case ARMII::StFrm: 417 emitLoadStoreInstruction(MI); 418 break; 419 case ARMII::LdMiscFrm: 420 case ARMII::StMiscFrm: 421 emitMiscLoadStoreInstruction(MI); 422 break; 423 case ARMII::LdStMulFrm: 424 emitLoadStoreMultipleInstruction(MI); 425 break; 426 case ARMII::MulFrm: 427 emitMulFrmInstruction(MI); 428 break; 429 case ARMII::ExtFrm: 430 emitExtendInstruction(MI); 431 break; 432 case ARMII::ArithMiscFrm: 433 emitMiscArithInstruction(MI); 434 break; 435 case ARMII::SatFrm: 436 emitSaturateInstruction(MI); 437 break; 438 case ARMII::BrFrm: 439 emitBranchInstruction(MI); 440 break; 441 case ARMII::BrMiscFrm: 442 emitMiscBranchInstruction(MI); 443 break; 444 // VFP instructions. 445 case ARMII::VFPUnaryFrm: 446 case ARMII::VFPBinaryFrm: 447 emitVFPArithInstruction(MI); 448 break; 449 case ARMII::VFPConv1Frm: 450 case ARMII::VFPConv2Frm: 451 case ARMII::VFPConv3Frm: 452 case ARMII::VFPConv4Frm: 453 case ARMII::VFPConv5Frm: 454 emitVFPConversionInstruction(MI); 455 break; 456 case ARMII::VFPLdStFrm: 457 emitVFPLoadStoreInstruction(MI); 458 break; 459 case ARMII::VFPLdStMulFrm: 460 emitVFPLoadStoreMultipleInstruction(MI); 461 break; 462 463 // NEON instructions. 464 case ARMII::NGetLnFrm: 465 case ARMII::NSetLnFrm: 466 emitNEONLaneInstruction(MI); 467 break; 468 case ARMII::NDupFrm: 469 emitNEONDupInstruction(MI); 470 break; 471 case ARMII::N1RegModImmFrm: 472 emitNEON1RegModImmInstruction(MI); 473 break; 474 case ARMII::N2RegFrm: 475 emitNEON2RegInstruction(MI); 476 break; 477 case ARMII::N3RegFrm: 478 emitNEON3RegInstruction(MI); 479 break; 480 } 481 MCE.processDebugLoc(MI.getDebugLoc(), false); 482} 483 484void ARMCodeEmitter::emitConstPoolInstruction(const MachineInstr &MI) { 485 unsigned CPI = MI.getOperand(0).getImm(); // CP instruction index. 486 unsigned CPIndex = MI.getOperand(1).getIndex(); // Actual cp entry index. 487 const MachineConstantPoolEntry &MCPE = (*MCPEs)[CPIndex]; 488 489 // Remember the CONSTPOOL_ENTRY address for later relocation. 490 JTI->addConstantPoolEntryAddr(CPI, MCE.getCurrentPCValue()); 491 492 // Emit constpool island entry. In most cases, the actual values will be 493 // resolved and relocated after code emission. 494 if (MCPE.isMachineConstantPoolEntry()) { 495 ARMConstantPoolValue *ACPV = 496 static_cast<ARMConstantPoolValue*>(MCPE.Val.MachineCPVal); 497 498 DEBUG(errs() << " ** ARM constant pool #" << CPI << " @ " 499 << (void*)MCE.getCurrentPCValue() << " " << *ACPV << '\n'); 500 501 assert(ACPV->isGlobalValue() && "unsupported constant pool value"); 502 const GlobalValue *GV = ACPV->getGV(); 503 if (GV) { 504 Reloc::Model RelocM = TM.getRelocationModel(); 505 emitGlobalAddress(GV, ARM::reloc_arm_machine_cp_entry, 506 isa<Function>(GV), 507 Subtarget->GVIsIndirectSymbol(GV, RelocM), 508 (intptr_t)ACPV); 509 } else { 510 emitExternalSymbolAddress(ACPV->getSymbol(), ARM::reloc_arm_absolute); 511 } 512 emitWordLE(0); 513 } else { 514 const Constant *CV = MCPE.Val.ConstVal; 515 516 DEBUG({ 517 errs() << " ** Constant pool #" << CPI << " @ " 518 << (void*)MCE.getCurrentPCValue() << " "; 519 if (const Function *F = dyn_cast<Function>(CV)) 520 errs() << F->getName(); 521 else 522 errs() << *CV; 523 errs() << '\n'; 524 }); 525 526 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) { 527 emitGlobalAddress(GV, ARM::reloc_arm_absolute, isa<Function>(GV), false); 528 emitWordLE(0); 529 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) { 530 uint32_t Val = uint32_t(*CI->getValue().getRawData()); 531 emitWordLE(Val); 532 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) { 533 if (CFP->getType()->isFloatTy()) 534 emitWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue()); 535 else if (CFP->getType()->isDoubleTy()) 536 emitDWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue()); 537 else { 538 llvm_unreachable("Unable to handle this constantpool entry!"); 539 } 540 } else { 541 llvm_unreachable("Unable to handle this constantpool entry!"); 542 } 543 } 544} 545 546void ARMCodeEmitter::emitMOVi32immInstruction(const MachineInstr &MI) { 547 const MachineOperand &MO0 = MI.getOperand(0); 548 const MachineOperand &MO1 = MI.getOperand(1); 549 550 // Emit the 'movw' instruction. 551 unsigned Binary = 0x30 << 20; // mov: Insts{27-20} = 0b00110000 552 553 unsigned Lo16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movw) & 0xFFFF; 554 555 // Set the conditional execution predicate. 556 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 557 558 // Encode Rd. 559 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift; 560 561 // Encode imm16 as imm4:imm12 562 Binary |= Lo16 & 0xFFF; // Insts{11-0} = imm12 563 Binary |= ((Lo16 >> 12) & 0xF) << 16; // Insts{19-16} = imm4 564 emitWordLE(Binary); 565 566 unsigned Hi16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movt) >> 16; 567 // Emit the 'movt' instruction. 568 Binary = 0x34 << 20; // movt: Insts{27-20} = 0b00110100 569 570 // Set the conditional execution predicate. 571 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 572 573 // Encode Rd. 574 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift; 575 576 // Encode imm16 as imm4:imm1, same as movw above. 577 Binary |= Hi16 & 0xFFF; 578 Binary |= ((Hi16 >> 12) & 0xF) << 16; 579 emitWordLE(Binary); 580} 581 582void ARMCodeEmitter::emitMOVi2piecesInstruction(const MachineInstr &MI) { 583 const MachineOperand &MO0 = MI.getOperand(0); 584 const MachineOperand &MO1 = MI.getOperand(1); 585 assert(MO1.isImm() && ARM_AM::isSOImmTwoPartVal(MO1.getImm()) && 586 "Not a valid so_imm value!"); 587 unsigned V1 = ARM_AM::getSOImmTwoPartFirst(MO1.getImm()); 588 unsigned V2 = ARM_AM::getSOImmTwoPartSecond(MO1.getImm()); 589 590 // Emit the 'mov' instruction. 591 unsigned Binary = 0xd << 21; // mov: Insts{24-21} = 0b1101 592 593 // Set the conditional execution predicate. 594 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 595 596 // Encode Rd. 597 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift; 598 599 // Encode so_imm. 600 // Set bit I(25) to identify this is the immediate form of <shifter_op> 601 Binary |= 1 << ARMII::I_BitShift; 602 Binary |= getMachineSoImmOpValue(V1); 603 emitWordLE(Binary); 604 605 // Now the 'orr' instruction. 606 Binary = 0xc << 21; // orr: Insts{24-21} = 0b1100 607 608 // Set the conditional execution predicate. 609 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 610 611 // Encode Rd. 612 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift; 613 614 // Encode Rn. 615 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRnShift; 616 617 // Encode so_imm. 618 // Set bit I(25) to identify this is the immediate form of <shifter_op> 619 Binary |= 1 << ARMII::I_BitShift; 620 Binary |= getMachineSoImmOpValue(V2); 621 emitWordLE(Binary); 622} 623 624void ARMCodeEmitter::emitLEApcrelJTInstruction(const MachineInstr &MI) { 625 // It's basically add r, pc, (LJTI - $+8) 626 627 const TargetInstrDesc &TID = MI.getDesc(); 628 629 // Emit the 'add' instruction. 630 unsigned Binary = 0x4 << 21; // add: Insts{24-31} = 0b0100 631 632 // Set the conditional execution predicate 633 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 634 635 // Encode S bit if MI modifies CPSR. 636 Binary |= getAddrModeSBit(MI, TID); 637 638 // Encode Rd. 639 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift; 640 641 // Encode Rn which is PC. 642 Binary |= getARMRegisterNumbering(ARM::PC) << ARMII::RegRnShift; 643 644 // Encode the displacement. 645 Binary |= 1 << ARMII::I_BitShift; 646 emitJumpTableAddress(MI.getOperand(1).getIndex(), ARM::reloc_arm_jt_base); 647 648 emitWordLE(Binary); 649} 650 651void ARMCodeEmitter::emitPseudoMoveInstruction(const MachineInstr &MI) { 652 unsigned Opcode = MI.getDesc().Opcode; 653 654 // Part of binary is determined by TableGn. 655 unsigned Binary = getBinaryCodeForInstr(MI); 656 657 // Set the conditional execution predicate 658 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 659 660 // Encode S bit if MI modifies CPSR. 661 if (Opcode == ARM::MOVsrl_flag || Opcode == ARM::MOVsra_flag) 662 Binary |= 1 << ARMII::S_BitShift; 663 664 // Encode register def if there is one. 665 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift; 666 667 // Encode the shift operation. 668 switch (Opcode) { 669 default: break; 670 case ARM::RRX: 671 // rrx 672 Binary |= 0x6 << 4; 673 break; 674 case ARM::MOVsrl_flag: 675 // lsr #1 676 Binary |= (0x2 << 4) | (1 << 7); 677 break; 678 case ARM::MOVsra_flag: 679 // asr #1 680 Binary |= (0x4 << 4) | (1 << 7); 681 break; 682 } 683 684 // Encode register Rm. 685 Binary |= getMachineOpValue(MI, 1); 686 687 emitWordLE(Binary); 688} 689 690void ARMCodeEmitter::addPCLabel(unsigned LabelID) { 691 DEBUG(errs() << " ** LPC" << LabelID << " @ " 692 << (void*)MCE.getCurrentPCValue() << '\n'); 693 JTI->addPCLabelAddr(LabelID, MCE.getCurrentPCValue()); 694} 695 696void ARMCodeEmitter::emitPseudoInstruction(const MachineInstr &MI) { 697 unsigned Opcode = MI.getDesc().Opcode; 698 switch (Opcode) { 699 default: 700 llvm_unreachable("ARMCodeEmitter::emitPseudoInstruction"); 701 case ARM::BX: 702 case ARM::BMOVPCRX: 703 case ARM::BXr9: 704 case ARM::BMOVPCRXr9: { 705 // First emit mov lr, pc 706 unsigned Binary = 0x01a0e00f; 707 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 708 emitWordLE(Binary); 709 710 // and then emit the branch. 711 emitMiscBranchInstruction(MI); 712 break; 713 } 714 case TargetOpcode::INLINEASM: { 715 // We allow inline assembler nodes with empty bodies - they can 716 // implicitly define registers, which is ok for JIT. 717 if (MI.getOperand(0).getSymbolName()[0]) { 718 report_fatal_error("JIT does not support inline asm!"); 719 } 720 break; 721 } 722 case TargetOpcode::PROLOG_LABEL: 723 case TargetOpcode::EH_LABEL: 724 MCE.emitLabel(MI.getOperand(0).getMCSymbol()); 725 break; 726 case TargetOpcode::IMPLICIT_DEF: 727 case TargetOpcode::KILL: 728 // Do nothing. 729 break; 730 case ARM::CONSTPOOL_ENTRY: 731 emitConstPoolInstruction(MI); 732 break; 733 case ARM::PICADD: { 734 // Remember of the address of the PC label for relocation later. 735 addPCLabel(MI.getOperand(2).getImm()); 736 // PICADD is just an add instruction that implicitly read pc. 737 emitDataProcessingInstruction(MI, 0, ARM::PC); 738 break; 739 } 740 case ARM::PICLDR: 741 case ARM::PICLDRB: 742 case ARM::PICSTR: 743 case ARM::PICSTRB: { 744 // Remember of the address of the PC label for relocation later. 745 addPCLabel(MI.getOperand(2).getImm()); 746 // These are just load / store instructions that implicitly read pc. 747 emitLoadStoreInstruction(MI, 0, ARM::PC); 748 break; 749 } 750 case ARM::PICLDRH: 751 case ARM::PICLDRSH: 752 case ARM::PICLDRSB: 753 case ARM::PICSTRH: { 754 // Remember of the address of the PC label for relocation later. 755 addPCLabel(MI.getOperand(2).getImm()); 756 // These are just load / store instructions that implicitly read pc. 757 emitMiscLoadStoreInstruction(MI, ARM::PC); 758 break; 759 } 760 761 case ARM::MOVi32imm: 762 emitMOVi32immInstruction(MI); 763 break; 764 765 case ARM::MOVi2pieces: 766 // Two instructions to materialize a constant. 767 emitMOVi2piecesInstruction(MI); 768 break; 769 case ARM::LEApcrelJT: 770 // Materialize jumptable address. 771 emitLEApcrelJTInstruction(MI); 772 break; 773 case ARM::RRX: 774 case ARM::MOVsrl_flag: 775 case ARM::MOVsra_flag: 776 emitPseudoMoveInstruction(MI); 777 break; 778 } 779} 780 781unsigned ARMCodeEmitter::getMachineSoRegOpValue(const MachineInstr &MI, 782 const TargetInstrDesc &TID, 783 const MachineOperand &MO, 784 unsigned OpIdx) { 785 unsigned Binary = getMachineOpValue(MI, MO); 786 787 const MachineOperand &MO1 = MI.getOperand(OpIdx + 1); 788 const MachineOperand &MO2 = MI.getOperand(OpIdx + 2); 789 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO2.getImm()); 790 791 // Encode the shift opcode. 792 unsigned SBits = 0; 793 unsigned Rs = MO1.getReg(); 794 if (Rs) { 795 // Set shift operand (bit[7:4]). 796 // LSL - 0001 797 // LSR - 0011 798 // ASR - 0101 799 // ROR - 0111 800 // RRX - 0110 and bit[11:8] clear. 801 switch (SOpc) { 802 default: llvm_unreachable("Unknown shift opc!"); 803 case ARM_AM::lsl: SBits = 0x1; break; 804 case ARM_AM::lsr: SBits = 0x3; break; 805 case ARM_AM::asr: SBits = 0x5; break; 806 case ARM_AM::ror: SBits = 0x7; break; 807 case ARM_AM::rrx: SBits = 0x6; break; 808 } 809 } else { 810 // Set shift operand (bit[6:4]). 811 // LSL - 000 812 // LSR - 010 813 // ASR - 100 814 // ROR - 110 815 switch (SOpc) { 816 default: llvm_unreachable("Unknown shift opc!"); 817 case ARM_AM::lsl: SBits = 0x0; break; 818 case ARM_AM::lsr: SBits = 0x2; break; 819 case ARM_AM::asr: SBits = 0x4; break; 820 case ARM_AM::ror: SBits = 0x6; break; 821 } 822 } 823 Binary |= SBits << 4; 824 if (SOpc == ARM_AM::rrx) 825 return Binary; 826 827 // Encode the shift operation Rs or shift_imm (except rrx). 828 if (Rs) { 829 // Encode Rs bit[11:8]. 830 assert(ARM_AM::getSORegOffset(MO2.getImm()) == 0); 831 return Binary | (getARMRegisterNumbering(Rs) << ARMII::RegRsShift); 832 } 833 834 // Encode shift_imm bit[11:7]. 835 return Binary | ARM_AM::getSORegOffset(MO2.getImm()) << 7; 836} 837 838unsigned ARMCodeEmitter::getMachineSoImmOpValue(unsigned SoImm) { 839 int SoImmVal = ARM_AM::getSOImmVal(SoImm); 840 assert(SoImmVal != -1 && "Not a valid so_imm value!"); 841 842 // Encode rotate_imm. 843 unsigned Binary = (ARM_AM::getSOImmValRot((unsigned)SoImmVal) >> 1) 844 << ARMII::SoRotImmShift; 845 846 // Encode immed_8. 847 Binary |= ARM_AM::getSOImmValImm((unsigned)SoImmVal); 848 return Binary; 849} 850 851unsigned ARMCodeEmitter::getAddrModeSBit(const MachineInstr &MI, 852 const TargetInstrDesc &TID) const { 853 for (unsigned i = MI.getNumOperands(), e = TID.getNumOperands(); i != e; --i){ 854 const MachineOperand &MO = MI.getOperand(i-1); 855 if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR) 856 return 1 << ARMII::S_BitShift; 857 } 858 return 0; 859} 860 861void ARMCodeEmitter::emitDataProcessingInstruction(const MachineInstr &MI, 862 unsigned ImplicitRd, 863 unsigned ImplicitRn) { 864 const TargetInstrDesc &TID = MI.getDesc(); 865 866 // Part of binary is determined by TableGn. 867 unsigned Binary = getBinaryCodeForInstr(MI); 868 869 // Set the conditional execution predicate 870 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 871 872 // Encode S bit if MI modifies CPSR. 873 Binary |= getAddrModeSBit(MI, TID); 874 875 // Encode register def if there is one. 876 unsigned NumDefs = TID.getNumDefs(); 877 unsigned OpIdx = 0; 878 if (NumDefs) 879 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift; 880 else if (ImplicitRd) 881 // Special handling for implicit use (e.g. PC). 882 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift); 883 884 if (TID.Opcode == ARM::MOVi16) { 885 // Get immediate from MI. 886 unsigned Lo16 = getMovi32Value(MI, MI.getOperand(OpIdx), 887 ARM::reloc_arm_movw); 888 // Encode imm which is the same as in emitMOVi32immInstruction(). 889 Binary |= Lo16 & 0xFFF; 890 Binary |= ((Lo16 >> 12) & 0xF) << 16; 891 emitWordLE(Binary); 892 return; 893 } else if(TID.Opcode == ARM::MOVTi16) { 894 unsigned Hi16 = (getMovi32Value(MI, MI.getOperand(OpIdx), 895 ARM::reloc_arm_movt) >> 16); 896 Binary |= Hi16 & 0xFFF; 897 Binary |= ((Hi16 >> 12) & 0xF) << 16; 898 emitWordLE(Binary); 899 return; 900 } else if ((TID.Opcode == ARM::BFC) || (TID.Opcode == ARM::BFI)) { 901 uint32_t v = ~MI.getOperand(2).getImm(); 902 int32_t lsb = CountTrailingZeros_32(v); 903 int32_t msb = (32 - CountLeadingZeros_32(v)) - 1; 904 // Instr{20-16} = msb, Instr{11-7} = lsb 905 Binary |= (msb & 0x1F) << 16; 906 Binary |= (lsb & 0x1F) << 7; 907 emitWordLE(Binary); 908 return; 909 } else if ((TID.Opcode == ARM::UBFX) || (TID.Opcode == ARM::SBFX)) { 910 // Encode Rn in Instr{0-3} 911 Binary |= getMachineOpValue(MI, OpIdx++); 912 913 uint32_t lsb = MI.getOperand(OpIdx++).getImm(); 914 uint32_t widthm1 = MI.getOperand(OpIdx++).getImm() - 1; 915 916 // Instr{20-16} = widthm1, Instr{11-7} = lsb 917 Binary |= (widthm1 & 0x1F) << 16; 918 Binary |= (lsb & 0x1F) << 7; 919 emitWordLE(Binary); 920 return; 921 } 922 923 // If this is a two-address operand, skip it. e.g. MOVCCr operand 1. 924 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) 925 ++OpIdx; 926 927 // Encode first non-shifter register operand if there is one. 928 bool isUnary = TID.TSFlags & ARMII::UnaryDP; 929 if (!isUnary) { 930 if (ImplicitRn) 931 // Special handling for implicit use (e.g. PC). 932 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift); 933 else { 934 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRnShift; 935 ++OpIdx; 936 } 937 } 938 939 // Encode shifter operand. 940 const MachineOperand &MO = MI.getOperand(OpIdx); 941 if ((TID.TSFlags & ARMII::FormMask) == ARMII::DPSoRegFrm) { 942 // Encode SoReg. 943 emitWordLE(Binary | getMachineSoRegOpValue(MI, TID, MO, OpIdx)); 944 return; 945 } 946 947 if (MO.isReg()) { 948 // Encode register Rm. 949 emitWordLE(Binary | getARMRegisterNumbering(MO.getReg())); 950 return; 951 } 952 953 // Encode so_imm. 954 Binary |= getMachineSoImmOpValue((unsigned)MO.getImm()); 955 956 emitWordLE(Binary); 957} 958 959void ARMCodeEmitter::emitLoadStoreInstruction(const MachineInstr &MI, 960 unsigned ImplicitRd, 961 unsigned ImplicitRn) { 962 const TargetInstrDesc &TID = MI.getDesc(); 963 unsigned Form = TID.TSFlags & ARMII::FormMask; 964 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0; 965 966 // Part of binary is determined by TableGn. 967 unsigned Binary = getBinaryCodeForInstr(MI); 968 969 // If this is an LDRi12, STRi12 or LDRcp, nothing more needs be done. 970 if (MI.getOpcode() == ARM::LDRi12 || MI.getOpcode() == ARM::LDRcp || 971 MI.getOpcode() == ARM::STRi12) { 972 emitWordLE(Binary); 973 return; 974 } 975 976 // Set the conditional execution predicate 977 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 978 979 unsigned OpIdx = 0; 980 981 // Operand 0 of a pre- and post-indexed store is the address base 982 // writeback. Skip it. 983 bool Skipped = false; 984 if (IsPrePost && Form == ARMII::StFrm) { 985 ++OpIdx; 986 Skipped = true; 987 } 988 989 // Set first operand 990 if (ImplicitRd) 991 // Special handling for implicit use (e.g. PC). 992 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift); 993 else 994 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift; 995 996 // Set second operand 997 if (ImplicitRn) 998 // Special handling for implicit use (e.g. PC). 999 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift); 1000 else 1001 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift; 1002 1003 // If this is a two-address operand, skip it. e.g. LDR_PRE. 1004 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) 1005 ++OpIdx; 1006 1007 const MachineOperand &MO2 = MI.getOperand(OpIdx); 1008 unsigned AM2Opc = (ImplicitRn == ARM::PC) 1009 ? 0 : MI.getOperand(OpIdx+1).getImm(); 1010 1011 // Set bit U(23) according to sign of immed value (positive or negative). 1012 Binary |= ((ARM_AM::getAM2Op(AM2Opc) == ARM_AM::add ? 1 : 0) << 1013 ARMII::U_BitShift); 1014 if (!MO2.getReg()) { // is immediate 1015 if (ARM_AM::getAM2Offset(AM2Opc)) 1016 // Set the value of offset_12 field 1017 Binary |= ARM_AM::getAM2Offset(AM2Opc); 1018 emitWordLE(Binary); 1019 return; 1020 } 1021 1022 // Set bit I(25), because this is not in immediate encoding. 1023 Binary |= 1 << ARMII::I_BitShift; 1024 assert(TargetRegisterInfo::isPhysicalRegister(MO2.getReg())); 1025 // Set bit[3:0] to the corresponding Rm register 1026 Binary |= getARMRegisterNumbering(MO2.getReg()); 1027 1028 // If this instr is in scaled register offset/index instruction, set 1029 // shift_immed(bit[11:7]) and shift(bit[6:5]) fields. 1030 if (unsigned ShImm = ARM_AM::getAM2Offset(AM2Opc)) { 1031 Binary |= getShiftOp(AM2Opc) << ARMII::ShiftImmShift; // shift 1032 Binary |= ShImm << ARMII::ShiftShift; // shift_immed 1033 } 1034 1035 emitWordLE(Binary); 1036} 1037 1038void ARMCodeEmitter::emitMiscLoadStoreInstruction(const MachineInstr &MI, 1039 unsigned ImplicitRn) { 1040 const TargetInstrDesc &TID = MI.getDesc(); 1041 unsigned Form = TID.TSFlags & ARMII::FormMask; 1042 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0; 1043 1044 // Part of binary is determined by TableGn. 1045 unsigned Binary = getBinaryCodeForInstr(MI); 1046 1047 // Set the conditional execution predicate 1048 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1049 1050 unsigned OpIdx = 0; 1051 1052 // Operand 0 of a pre- and post-indexed store is the address base 1053 // writeback. Skip it. 1054 bool Skipped = false; 1055 if (IsPrePost && Form == ARMII::StMiscFrm) { 1056 ++OpIdx; 1057 Skipped = true; 1058 } 1059 1060 // Set first operand 1061 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift; 1062 1063 // Skip LDRD and STRD's second operand. 1064 if (TID.Opcode == ARM::LDRD || TID.Opcode == ARM::STRD) 1065 ++OpIdx; 1066 1067 // Set second operand 1068 if (ImplicitRn) 1069 // Special handling for implicit use (e.g. PC). 1070 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift); 1071 else 1072 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift; 1073 1074 // If this is a two-address operand, skip it. e.g. LDRH_POST. 1075 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) 1076 ++OpIdx; 1077 1078 const MachineOperand &MO2 = MI.getOperand(OpIdx); 1079 unsigned AM3Opc = (ImplicitRn == ARM::PC) 1080 ? 0 : MI.getOperand(OpIdx+1).getImm(); 1081 1082 // Set bit U(23) according to sign of immed value (positive or negative) 1083 Binary |= ((ARM_AM::getAM3Op(AM3Opc) == ARM_AM::add ? 1 : 0) << 1084 ARMII::U_BitShift); 1085 1086 // If this instr is in register offset/index encoding, set bit[3:0] 1087 // to the corresponding Rm register. 1088 if (MO2.getReg()) { 1089 Binary |= getARMRegisterNumbering(MO2.getReg()); 1090 emitWordLE(Binary); 1091 return; 1092 } 1093 1094 // This instr is in immediate offset/index encoding, set bit 22 to 1. 1095 Binary |= 1 << ARMII::AM3_I_BitShift; 1096 if (unsigned ImmOffs = ARM_AM::getAM3Offset(AM3Opc)) { 1097 // Set operands 1098 Binary |= (ImmOffs >> 4) << ARMII::ImmHiShift; // immedH 1099 Binary |= (ImmOffs & 0xF); // immedL 1100 } 1101 1102 emitWordLE(Binary); 1103} 1104 1105static unsigned getAddrModeUPBits(unsigned Mode) { 1106 unsigned Binary = 0; 1107 1108 // Set addressing mode by modifying bits U(23) and P(24) 1109 // IA - Increment after - bit U = 1 and bit P = 0 1110 // IB - Increment before - bit U = 1 and bit P = 1 1111 // DA - Decrement after - bit U = 0 and bit P = 0 1112 // DB - Decrement before - bit U = 0 and bit P = 1 1113 switch (Mode) { 1114 default: llvm_unreachable("Unknown addressing sub-mode!"); 1115 case ARM_AM::da: break; 1116 case ARM_AM::db: Binary |= 0x1 << ARMII::P_BitShift; break; 1117 case ARM_AM::ia: Binary |= 0x1 << ARMII::U_BitShift; break; 1118 case ARM_AM::ib: Binary |= 0x3 << ARMII::U_BitShift; break; 1119 } 1120 1121 return Binary; 1122} 1123 1124void ARMCodeEmitter::emitLoadStoreMultipleInstruction(const MachineInstr &MI) { 1125 const TargetInstrDesc &TID = MI.getDesc(); 1126 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0; 1127 1128 // Part of binary is determined by TableGn. 1129 unsigned Binary = getBinaryCodeForInstr(MI); 1130 1131 // Set the conditional execution predicate 1132 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1133 1134 // Skip operand 0 of an instruction with base register update. 1135 unsigned OpIdx = 0; 1136 if (IsUpdating) 1137 ++OpIdx; 1138 1139 // Set base address operand 1140 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift; 1141 1142 // Set addressing mode by modifying bits U(23) and P(24) 1143 const MachineOperand &MO = MI.getOperand(OpIdx++); 1144 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(MO.getImm())); 1145 1146 // Set bit W(21) 1147 if (IsUpdating) 1148 Binary |= 0x1 << ARMII::W_BitShift; 1149 1150 // Set registers 1151 for (unsigned i = OpIdx+2, e = MI.getNumOperands(); i != e; ++i) { 1152 const MachineOperand &MO = MI.getOperand(i); 1153 if (!MO.isReg() || MO.isImplicit()) 1154 break; 1155 unsigned RegNum = getARMRegisterNumbering(MO.getReg()); 1156 assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) && 1157 RegNum < 16); 1158 Binary |= 0x1 << RegNum; 1159 } 1160 1161 emitWordLE(Binary); 1162} 1163 1164void ARMCodeEmitter::emitMulFrmInstruction(const MachineInstr &MI) { 1165 const TargetInstrDesc &TID = MI.getDesc(); 1166 1167 // Part of binary is determined by TableGn. 1168 unsigned Binary = getBinaryCodeForInstr(MI); 1169 1170 // Set the conditional execution predicate 1171 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1172 1173 // Encode S bit if MI modifies CPSR. 1174 Binary |= getAddrModeSBit(MI, TID); 1175 1176 // 32x32->64bit operations have two destination registers. The number 1177 // of register definitions will tell us if that's what we're dealing with. 1178 unsigned OpIdx = 0; 1179 if (TID.getNumDefs() == 2) 1180 Binary |= getMachineOpValue (MI, OpIdx++) << ARMII::RegRdLoShift; 1181 1182 // Encode Rd 1183 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdHiShift; 1184 1185 // Encode Rm 1186 Binary |= getMachineOpValue(MI, OpIdx++); 1187 1188 // Encode Rs 1189 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRsShift; 1190 1191 // Many multiple instructions (e.g. MLA) have three src operands. Encode 1192 // it as Rn (for multiply, that's in the same offset as RdLo. 1193 if (TID.getNumOperands() > OpIdx && 1194 !TID.OpInfo[OpIdx].isPredicate() && 1195 !TID.OpInfo[OpIdx].isOptionalDef()) 1196 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRdLoShift; 1197 1198 emitWordLE(Binary); 1199} 1200 1201void ARMCodeEmitter::emitExtendInstruction(const MachineInstr &MI) { 1202 const TargetInstrDesc &TID = MI.getDesc(); 1203 1204 // Part of binary is determined by TableGn. 1205 unsigned Binary = getBinaryCodeForInstr(MI); 1206 1207 // Set the conditional execution predicate 1208 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1209 1210 unsigned OpIdx = 0; 1211 1212 // Encode Rd 1213 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift; 1214 1215 const MachineOperand &MO1 = MI.getOperand(OpIdx++); 1216 const MachineOperand &MO2 = MI.getOperand(OpIdx); 1217 if (MO2.isReg()) { 1218 // Two register operand form. 1219 // Encode Rn. 1220 Binary |= getMachineOpValue(MI, MO1) << ARMII::RegRnShift; 1221 1222 // Encode Rm. 1223 Binary |= getMachineOpValue(MI, MO2); 1224 ++OpIdx; 1225 } else { 1226 Binary |= getMachineOpValue(MI, MO1); 1227 } 1228 1229 // Encode rot imm (0, 8, 16, or 24) if it has a rotate immediate operand. 1230 if (MI.getOperand(OpIdx).isImm() && 1231 !TID.OpInfo[OpIdx].isPredicate() && 1232 !TID.OpInfo[OpIdx].isOptionalDef()) 1233 Binary |= (getMachineOpValue(MI, OpIdx) / 8) << ARMII::ExtRotImmShift; 1234 1235 emitWordLE(Binary); 1236} 1237 1238void ARMCodeEmitter::emitMiscArithInstruction(const MachineInstr &MI) { 1239 const TargetInstrDesc &TID = MI.getDesc(); 1240 1241 // Part of binary is determined by TableGn. 1242 unsigned Binary = getBinaryCodeForInstr(MI); 1243 1244 // Set the conditional execution predicate 1245 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1246 1247 unsigned OpIdx = 0; 1248 1249 // Encode Rd 1250 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift; 1251 1252 const MachineOperand &MO = MI.getOperand(OpIdx++); 1253 if (OpIdx == TID.getNumOperands() || 1254 TID.OpInfo[OpIdx].isPredicate() || 1255 TID.OpInfo[OpIdx].isOptionalDef()) { 1256 // Encode Rm and it's done. 1257 Binary |= getMachineOpValue(MI, MO); 1258 emitWordLE(Binary); 1259 return; 1260 } 1261 1262 // Encode Rn. 1263 Binary |= getMachineOpValue(MI, MO) << ARMII::RegRnShift; 1264 1265 // Encode Rm. 1266 Binary |= getMachineOpValue(MI, OpIdx++); 1267 1268 // Encode shift_imm. 1269 unsigned ShiftAmt = MI.getOperand(OpIdx).getImm(); 1270 if (TID.Opcode == ARM::PKHTB) { 1271 assert(ShiftAmt != 0 && "PKHTB shift_imm is 0!"); 1272 if (ShiftAmt == 32) 1273 ShiftAmt = 0; 1274 } 1275 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!"); 1276 Binary |= ShiftAmt << ARMII::ShiftShift; 1277 1278 emitWordLE(Binary); 1279} 1280 1281void ARMCodeEmitter::emitSaturateInstruction(const MachineInstr &MI) { 1282 const TargetInstrDesc &TID = MI.getDesc(); 1283 1284 // Part of binary is determined by TableGen. 1285 unsigned Binary = getBinaryCodeForInstr(MI); 1286 1287 // Set the conditional execution predicate 1288 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1289 1290 // Encode Rd 1291 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift; 1292 1293 // Encode saturate bit position. 1294 unsigned Pos = MI.getOperand(1).getImm(); 1295 if (TID.Opcode == ARM::SSAT || TID.Opcode == ARM::SSAT16) 1296 Pos -= 1; 1297 assert((Pos < 16 || (Pos < 32 && 1298 TID.Opcode != ARM::SSAT16 && 1299 TID.Opcode != ARM::USAT16)) && 1300 "saturate bit position out of range"); 1301 Binary |= Pos << 16; 1302 1303 // Encode Rm 1304 Binary |= getMachineOpValue(MI, 2); 1305 1306 // Encode shift_imm. 1307 if (TID.getNumOperands() == 4) { 1308 unsigned ShiftOp = MI.getOperand(3).getImm(); 1309 ARM_AM::ShiftOpc Opc = ARM_AM::getSORegShOp(ShiftOp); 1310 if (Opc == ARM_AM::asr) 1311 Binary |= (1 << 6); 1312 unsigned ShiftAmt = MI.getOperand(3).getImm(); 1313 if (ShiftAmt == 32 && Opc == ARM_AM::asr) 1314 ShiftAmt = 0; 1315 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!"); 1316 Binary |= ShiftAmt << ARMII::ShiftShift; 1317 } 1318 1319 emitWordLE(Binary); 1320} 1321 1322void ARMCodeEmitter::emitBranchInstruction(const MachineInstr &MI) { 1323 const TargetInstrDesc &TID = MI.getDesc(); 1324 1325 if (TID.Opcode == ARM::TPsoft) { 1326 llvm_unreachable("ARM::TPsoft FIXME"); // FIXME 1327 } 1328 1329 // Part of binary is determined by TableGn. 1330 unsigned Binary = getBinaryCodeForInstr(MI); 1331 1332 // Set the conditional execution predicate 1333 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1334 1335 // Set signed_immed_24 field 1336 Binary |= getMachineOpValue(MI, 0); 1337 1338 emitWordLE(Binary); 1339} 1340 1341void ARMCodeEmitter::emitInlineJumpTable(unsigned JTIndex) { 1342 // Remember the base address of the inline jump table. 1343 uintptr_t JTBase = MCE.getCurrentPCValue(); 1344 JTI->addJumpTableBaseAddr(JTIndex, JTBase); 1345 DEBUG(errs() << " ** Jump Table #" << JTIndex << " @ " << (void*)JTBase 1346 << '\n'); 1347 1348 // Now emit the jump table entries. 1349 const std::vector<MachineBasicBlock*> &MBBs = (*MJTEs)[JTIndex].MBBs; 1350 for (unsigned i = 0, e = MBBs.size(); i != e; ++i) { 1351 if (IsPIC) 1352 // DestBB address - JT base. 1353 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_pic_jt, JTBase); 1354 else 1355 // Absolute DestBB address. 1356 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_absolute); 1357 emitWordLE(0); 1358 } 1359} 1360 1361void ARMCodeEmitter::emitMiscBranchInstruction(const MachineInstr &MI) { 1362 const TargetInstrDesc &TID = MI.getDesc(); 1363 1364 // Handle jump tables. 1365 if (TID.Opcode == ARM::BR_JTr || TID.Opcode == ARM::BR_JTadd) { 1366 // First emit a ldr pc, [] instruction. 1367 emitDataProcessingInstruction(MI, ARM::PC); 1368 1369 // Then emit the inline jump table. 1370 unsigned JTIndex = 1371 (TID.Opcode == ARM::BR_JTr) 1372 ? MI.getOperand(1).getIndex() : MI.getOperand(2).getIndex(); 1373 emitInlineJumpTable(JTIndex); 1374 return; 1375 } else if (TID.Opcode == ARM::BR_JTm) { 1376 // First emit a ldr pc, [] instruction. 1377 emitLoadStoreInstruction(MI, ARM::PC); 1378 1379 // Then emit the inline jump table. 1380 emitInlineJumpTable(MI.getOperand(3).getIndex()); 1381 return; 1382 } 1383 1384 // Part of binary is determined by TableGn. 1385 unsigned Binary = getBinaryCodeForInstr(MI); 1386 1387 // Set the conditional execution predicate 1388 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1389 1390 if (TID.Opcode == ARM::BX_RET || TID.Opcode == ARM::MOVPCLR) 1391 // The return register is LR. 1392 Binary |= getARMRegisterNumbering(ARM::LR); 1393 else 1394 // otherwise, set the return register 1395 Binary |= getMachineOpValue(MI, 0); 1396 1397 emitWordLE(Binary); 1398} 1399 1400static unsigned encodeVFPRd(const MachineInstr &MI, unsigned OpIdx) { 1401 unsigned RegD = MI.getOperand(OpIdx).getReg(); 1402 unsigned Binary = 0; 1403 bool isSPVFP = ARM::SPRRegisterClass->contains(RegD); 1404 RegD = getARMRegisterNumbering(RegD); 1405 if (!isSPVFP) 1406 Binary |= RegD << ARMII::RegRdShift; 1407 else { 1408 Binary |= ((RegD & 0x1E) >> 1) << ARMII::RegRdShift; 1409 Binary |= (RegD & 0x01) << ARMII::D_BitShift; 1410 } 1411 return Binary; 1412} 1413 1414static unsigned encodeVFPRn(const MachineInstr &MI, unsigned OpIdx) { 1415 unsigned RegN = MI.getOperand(OpIdx).getReg(); 1416 unsigned Binary = 0; 1417 bool isSPVFP = ARM::SPRRegisterClass->contains(RegN); 1418 RegN = getARMRegisterNumbering(RegN); 1419 if (!isSPVFP) 1420 Binary |= RegN << ARMII::RegRnShift; 1421 else { 1422 Binary |= ((RegN & 0x1E) >> 1) << ARMII::RegRnShift; 1423 Binary |= (RegN & 0x01) << ARMII::N_BitShift; 1424 } 1425 return Binary; 1426} 1427 1428static unsigned encodeVFPRm(const MachineInstr &MI, unsigned OpIdx) { 1429 unsigned RegM = MI.getOperand(OpIdx).getReg(); 1430 unsigned Binary = 0; 1431 bool isSPVFP = ARM::SPRRegisterClass->contains(RegM); 1432 RegM = getARMRegisterNumbering(RegM); 1433 if (!isSPVFP) 1434 Binary |= RegM; 1435 else { 1436 Binary |= ((RegM & 0x1E) >> 1); 1437 Binary |= (RegM & 0x01) << ARMII::M_BitShift; 1438 } 1439 return Binary; 1440} 1441 1442void ARMCodeEmitter::emitVFPArithInstruction(const MachineInstr &MI) { 1443 const TargetInstrDesc &TID = MI.getDesc(); 1444 1445 // Part of binary is determined by TableGn. 1446 unsigned Binary = getBinaryCodeForInstr(MI); 1447 1448 // Set the conditional execution predicate 1449 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1450 1451 unsigned OpIdx = 0; 1452 assert((Binary & ARMII::D_BitShift) == 0 && 1453 (Binary & ARMII::N_BitShift) == 0 && 1454 (Binary & ARMII::M_BitShift) == 0 && "VFP encoding bug!"); 1455 1456 // Encode Dd / Sd. 1457 Binary |= encodeVFPRd(MI, OpIdx++); 1458 1459 // If this is a two-address operand, skip it, e.g. FMACD. 1460 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) 1461 ++OpIdx; 1462 1463 // Encode Dn / Sn. 1464 if ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPBinaryFrm) 1465 Binary |= encodeVFPRn(MI, OpIdx++); 1466 1467 if (OpIdx == TID.getNumOperands() || 1468 TID.OpInfo[OpIdx].isPredicate() || 1469 TID.OpInfo[OpIdx].isOptionalDef()) { 1470 // FCMPEZD etc. has only one operand. 1471 emitWordLE(Binary); 1472 return; 1473 } 1474 1475 // Encode Dm / Sm. 1476 Binary |= encodeVFPRm(MI, OpIdx); 1477 1478 emitWordLE(Binary); 1479} 1480 1481void ARMCodeEmitter::emitVFPConversionInstruction(const MachineInstr &MI) { 1482 const TargetInstrDesc &TID = MI.getDesc(); 1483 unsigned Form = TID.TSFlags & ARMII::FormMask; 1484 1485 // Part of binary is determined by TableGn. 1486 unsigned Binary = getBinaryCodeForInstr(MI); 1487 1488 // Set the conditional execution predicate 1489 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1490 1491 switch (Form) { 1492 default: break; 1493 case ARMII::VFPConv1Frm: 1494 case ARMII::VFPConv2Frm: 1495 case ARMII::VFPConv3Frm: 1496 // Encode Dd / Sd. 1497 Binary |= encodeVFPRd(MI, 0); 1498 break; 1499 case ARMII::VFPConv4Frm: 1500 // Encode Dn / Sn. 1501 Binary |= encodeVFPRn(MI, 0); 1502 break; 1503 case ARMII::VFPConv5Frm: 1504 // Encode Dm / Sm. 1505 Binary |= encodeVFPRm(MI, 0); 1506 break; 1507 } 1508 1509 switch (Form) { 1510 default: break; 1511 case ARMII::VFPConv1Frm: 1512 // Encode Dm / Sm. 1513 Binary |= encodeVFPRm(MI, 1); 1514 break; 1515 case ARMII::VFPConv2Frm: 1516 case ARMII::VFPConv3Frm: 1517 // Encode Dn / Sn. 1518 Binary |= encodeVFPRn(MI, 1); 1519 break; 1520 case ARMII::VFPConv4Frm: 1521 case ARMII::VFPConv5Frm: 1522 // Encode Dd / Sd. 1523 Binary |= encodeVFPRd(MI, 1); 1524 break; 1525 } 1526 1527 if (Form == ARMII::VFPConv5Frm) 1528 // Encode Dn / Sn. 1529 Binary |= encodeVFPRn(MI, 2); 1530 else if (Form == ARMII::VFPConv3Frm) 1531 // Encode Dm / Sm. 1532 Binary |= encodeVFPRm(MI, 2); 1533 1534 emitWordLE(Binary); 1535} 1536 1537void ARMCodeEmitter::emitVFPLoadStoreInstruction(const MachineInstr &MI) { 1538 // Part of binary is determined by TableGn. 1539 unsigned Binary = getBinaryCodeForInstr(MI); 1540 1541 // Set the conditional execution predicate 1542 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1543 1544 unsigned OpIdx = 0; 1545 1546 // Encode Dd / Sd. 1547 Binary |= encodeVFPRd(MI, OpIdx++); 1548 1549 // Encode address base. 1550 const MachineOperand &Base = MI.getOperand(OpIdx++); 1551 Binary |= getMachineOpValue(MI, Base) << ARMII::RegRnShift; 1552 1553 // If there is a non-zero immediate offset, encode it. 1554 if (Base.isReg()) { 1555 const MachineOperand &Offset = MI.getOperand(OpIdx); 1556 if (unsigned ImmOffs = ARM_AM::getAM5Offset(Offset.getImm())) { 1557 if (ARM_AM::getAM5Op(Offset.getImm()) == ARM_AM::add) 1558 Binary |= 1 << ARMII::U_BitShift; 1559 Binary |= ImmOffs; 1560 emitWordLE(Binary); 1561 return; 1562 } 1563 } 1564 1565 // If immediate offset is omitted, default to +0. 1566 Binary |= 1 << ARMII::U_BitShift; 1567 1568 emitWordLE(Binary); 1569} 1570 1571void 1572ARMCodeEmitter::emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI) { 1573 const TargetInstrDesc &TID = MI.getDesc(); 1574 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0; 1575 1576 // Part of binary is determined by TableGn. 1577 unsigned Binary = getBinaryCodeForInstr(MI); 1578 1579 // Set the conditional execution predicate 1580 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1581 1582 // Skip operand 0 of an instruction with base register update. 1583 unsigned OpIdx = 0; 1584 if (IsUpdating) 1585 ++OpIdx; 1586 1587 // Set base address operand 1588 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift; 1589 1590 // Set addressing mode by modifying bits U(23) and P(24) 1591 const MachineOperand &MO = MI.getOperand(OpIdx++); 1592 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(MO.getImm())); 1593 1594 // Set bit W(21) 1595 if (IsUpdating) 1596 Binary |= 0x1 << ARMII::W_BitShift; 1597 1598 // First register is encoded in Dd. 1599 Binary |= encodeVFPRd(MI, OpIdx+2); 1600 1601 // Count the number of registers. 1602 unsigned NumRegs = 1; 1603 for (unsigned i = OpIdx+3, e = MI.getNumOperands(); i != e; ++i) { 1604 const MachineOperand &MO = MI.getOperand(i); 1605 if (!MO.isReg() || MO.isImplicit()) 1606 break; 1607 ++NumRegs; 1608 } 1609 // Bit 8 will be set if <list> is consecutive 64-bit registers (e.g., D0) 1610 // Otherwise, it will be 0, in the case of 32-bit registers. 1611 if(Binary & 0x100) 1612 Binary |= NumRegs * 2; 1613 else 1614 Binary |= NumRegs; 1615 1616 emitWordLE(Binary); 1617} 1618 1619static unsigned encodeNEONRd(const MachineInstr &MI, unsigned OpIdx) { 1620 unsigned RegD = MI.getOperand(OpIdx).getReg(); 1621 unsigned Binary = 0; 1622 RegD = getARMRegisterNumbering(RegD); 1623 Binary |= (RegD & 0xf) << ARMII::RegRdShift; 1624 Binary |= ((RegD >> 4) & 1) << ARMII::D_BitShift; 1625 return Binary; 1626} 1627 1628static unsigned encodeNEONRn(const MachineInstr &MI, unsigned OpIdx) { 1629 unsigned RegN = MI.getOperand(OpIdx).getReg(); 1630 unsigned Binary = 0; 1631 RegN = getARMRegisterNumbering(RegN); 1632 Binary |= (RegN & 0xf) << ARMII::RegRnShift; 1633 Binary |= ((RegN >> 4) & 1) << ARMII::N_BitShift; 1634 return Binary; 1635} 1636 1637static unsigned encodeNEONRm(const MachineInstr &MI, unsigned OpIdx) { 1638 unsigned RegM = MI.getOperand(OpIdx).getReg(); 1639 unsigned Binary = 0; 1640 RegM = getARMRegisterNumbering(RegM); 1641 Binary |= (RegM & 0xf); 1642 Binary |= ((RegM >> 4) & 1) << ARMII::M_BitShift; 1643 return Binary; 1644} 1645 1646/// convertNEONDataProcToThumb - Convert the ARM mode encoding for a NEON 1647/// data-processing instruction to the corresponding Thumb encoding. 1648static unsigned convertNEONDataProcToThumb(unsigned Binary) { 1649 assert((Binary & 0xfe000000) == 0xf2000000 && 1650 "not an ARM NEON data-processing instruction"); 1651 unsigned UBit = (Binary >> 24) & 1; 1652 return 0xef000000 | (UBit << 28) | (Binary & 0xffffff); 1653} 1654 1655void ARMCodeEmitter::emitNEONLaneInstruction(const MachineInstr &MI) { 1656 unsigned Binary = getBinaryCodeForInstr(MI); 1657 1658 unsigned RegTOpIdx, RegNOpIdx, LnOpIdx; 1659 const TargetInstrDesc &TID = MI.getDesc(); 1660 if ((TID.TSFlags & ARMII::FormMask) == ARMII::NGetLnFrm) { 1661 RegTOpIdx = 0; 1662 RegNOpIdx = 1; 1663 LnOpIdx = 2; 1664 } else { // ARMII::NSetLnFrm 1665 RegTOpIdx = 2; 1666 RegNOpIdx = 0; 1667 LnOpIdx = 3; 1668 } 1669 1670 // Set the conditional execution predicate 1671 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift; 1672 1673 unsigned RegT = MI.getOperand(RegTOpIdx).getReg(); 1674 RegT = getARMRegisterNumbering(RegT); 1675 Binary |= (RegT << ARMII::RegRdShift); 1676 Binary |= encodeNEONRn(MI, RegNOpIdx); 1677 1678 unsigned LaneShift; 1679 if ((Binary & (1 << 22)) != 0) 1680 LaneShift = 0; // 8-bit elements 1681 else if ((Binary & (1 << 5)) != 0) 1682 LaneShift = 1; // 16-bit elements 1683 else 1684 LaneShift = 2; // 32-bit elements 1685 1686 unsigned Lane = MI.getOperand(LnOpIdx).getImm() << LaneShift; 1687 unsigned Opc1 = Lane >> 2; 1688 unsigned Opc2 = Lane & 3; 1689 assert((Opc1 & 3) == 0 && "out-of-range lane number operand"); 1690 Binary |= (Opc1 << 21); 1691 Binary |= (Opc2 << 5); 1692 1693 emitWordLE(Binary); 1694} 1695 1696void ARMCodeEmitter::emitNEONDupInstruction(const MachineInstr &MI) { 1697 unsigned Binary = getBinaryCodeForInstr(MI); 1698 1699 // Set the conditional execution predicate 1700 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift; 1701 1702 unsigned RegT = MI.getOperand(1).getReg(); 1703 RegT = getARMRegisterNumbering(RegT); 1704 Binary |= (RegT << ARMII::RegRdShift); 1705 Binary |= encodeNEONRn(MI, 0); 1706 emitWordLE(Binary); 1707} 1708 1709void ARMCodeEmitter::emitNEON1RegModImmInstruction(const MachineInstr &MI) { 1710 unsigned Binary = getBinaryCodeForInstr(MI); 1711 // Destination register is encoded in Dd. 1712 Binary |= encodeNEONRd(MI, 0); 1713 // Immediate fields: Op, Cmode, I, Imm3, Imm4 1714 unsigned Imm = MI.getOperand(1).getImm(); 1715 unsigned Op = (Imm >> 12) & 1; 1716 unsigned Cmode = (Imm >> 8) & 0xf; 1717 unsigned I = (Imm >> 7) & 1; 1718 unsigned Imm3 = (Imm >> 4) & 0x7; 1719 unsigned Imm4 = Imm & 0xf; 1720 Binary |= (I << 24) | (Imm3 << 16) | (Cmode << 8) | (Op << 5) | Imm4; 1721 if (IsThumb) 1722 Binary = convertNEONDataProcToThumb(Binary); 1723 emitWordLE(Binary); 1724} 1725 1726void ARMCodeEmitter::emitNEON2RegInstruction(const MachineInstr &MI) { 1727 const TargetInstrDesc &TID = MI.getDesc(); 1728 unsigned Binary = getBinaryCodeForInstr(MI); 1729 // Destination register is encoded in Dd; source register in Dm. 1730 unsigned OpIdx = 0; 1731 Binary |= encodeNEONRd(MI, OpIdx++); 1732 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) 1733 ++OpIdx; 1734 Binary |= encodeNEONRm(MI, OpIdx); 1735 if (IsThumb) 1736 Binary = convertNEONDataProcToThumb(Binary); 1737 // FIXME: This does not handle VDUPfdf or VDUPfqf. 1738 emitWordLE(Binary); 1739} 1740 1741void ARMCodeEmitter::emitNEON3RegInstruction(const MachineInstr &MI) { 1742 const TargetInstrDesc &TID = MI.getDesc(); 1743 unsigned Binary = getBinaryCodeForInstr(MI); 1744 // Destination register is encoded in Dd; source registers in Dn and Dm. 1745 unsigned OpIdx = 0; 1746 Binary |= encodeNEONRd(MI, OpIdx++); 1747 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) 1748 ++OpIdx; 1749 Binary |= encodeNEONRn(MI, OpIdx++); 1750 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) 1751 ++OpIdx; 1752 Binary |= encodeNEONRm(MI, OpIdx); 1753 if (IsThumb) 1754 Binary = convertNEONDataProcToThumb(Binary); 1755 // FIXME: This does not handle VMOVDneon or VMOVQ. 1756 emitWordLE(Binary); 1757} 1758 1759#include "ARMGenCodeEmitter.inc" 1760