ARMCodeEmitter.cpp revision dc3c93266cd023dd0c8015626ef412b2d35d04bd
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); 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 emitMiscInstruction(const MachineInstr &MI); 144 145 void emitNEONLaneInstruction(const MachineInstr &MI); 146 void emitNEONDupInstruction(const MachineInstr &MI); 147 void emitNEON1RegModImmInstruction(const MachineInstr &MI); 148 void emitNEON2RegInstruction(const MachineInstr &MI); 149 void emitNEON3RegInstruction(const MachineInstr &MI); 150 151 /// getMachineOpValue - Return binary encoding of operand. If the machine 152 /// operand requires relocation, record the relocation and return zero. 153 unsigned getMachineOpValue(const MachineInstr &MI,const MachineOperand &MO); 154 unsigned getMachineOpValue(const MachineInstr &MI, unsigned OpIdx) { 155 return getMachineOpValue(MI, MI.getOperand(OpIdx)); 156 } 157 158 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the 159 /// machine operand requires relocation, record the relocation and return 160 /// zero. 161 unsigned getMovi32Value(const MachineInstr &MI,const MachineOperand &MO, 162 unsigned Reloc); 163 164 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value. 165 /// 166 unsigned getShiftOp(unsigned Imm) const ; 167 168 /// Routines that handle operands which add machine relocations which are 169 /// fixed up by the relocation stage. 170 void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc, 171 bool MayNeedFarStub, bool Indirect, 172 intptr_t ACPV = 0); 173 void emitExternalSymbolAddress(const char *ES, unsigned Reloc); 174 void emitConstPoolAddress(unsigned CPI, unsigned Reloc); 175 void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc); 176 void emitMachineBasicBlock(MachineBasicBlock *BB, unsigned Reloc, 177 intptr_t JTBase = 0); 178 }; 179} 180 181char ARMCodeEmitter::ID = 0; 182 183/// createARMJITCodeEmitterPass - Return a pass that emits the collected ARM 184/// code to the specified MCE object. 185FunctionPass *llvm::createARMJITCodeEmitterPass(ARMBaseTargetMachine &TM, 186 JITCodeEmitter &JCE) { 187 return new ARMCodeEmitter(TM, JCE); 188} 189 190bool ARMCodeEmitter::runOnMachineFunction(MachineFunction &MF) { 191 assert((MF.getTarget().getRelocationModel() != Reloc::Default || 192 MF.getTarget().getRelocationModel() != Reloc::Static) && 193 "JIT relocation model must be set to static or default!"); 194 JTI = ((ARMTargetMachine &)MF.getTarget()).getJITInfo(); 195 II = ((const ARMTargetMachine &)MF.getTarget()).getInstrInfo(); 196 TD = ((const ARMTargetMachine &)MF.getTarget()).getTargetData(); 197 Subtarget = &TM.getSubtarget<ARMSubtarget>(); 198 MCPEs = &MF.getConstantPool()->getConstants(); 199 MJTEs = 0; 200 if (MF.getJumpTableInfo()) MJTEs = &MF.getJumpTableInfo()->getJumpTables(); 201 IsPIC = TM.getRelocationModel() == Reloc::PIC_; 202 IsThumb = MF.getInfo<ARMFunctionInfo>()->isThumbFunction(); 203 JTI->Initialize(MF, IsPIC); 204 MMI = &getAnalysis<MachineModuleInfo>(); 205 MCE.setModuleInfo(MMI); 206 207 do { 208 DEBUG(errs() << "JITTing function '" 209 << MF.getFunction()->getName() << "'\n"); 210 MCE.startFunction(MF); 211 for (MachineFunction::iterator MBB = MF.begin(), E = MF.end(); 212 MBB != E; ++MBB) { 213 MCE.StartMachineBasicBlock(MBB); 214 for (MachineBasicBlock::const_iterator I = MBB->begin(), E = MBB->end(); 215 I != E; ++I) 216 emitInstruction(*I); 217 } 218 } while (MCE.finishFunction(MF)); 219 220 return false; 221} 222 223/// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value. 224/// 225unsigned ARMCodeEmitter::getShiftOp(unsigned Imm) const { 226 switch (ARM_AM::getAM2ShiftOpc(Imm)) { 227 default: llvm_unreachable("Unknown shift opc!"); 228 case ARM_AM::asr: return 2; 229 case ARM_AM::lsl: return 0; 230 case ARM_AM::lsr: return 1; 231 case ARM_AM::ror: 232 case ARM_AM::rrx: return 3; 233 } 234 return 0; 235} 236 237/// getMovi32Value - Return binary encoding of operand for movw/movt. If the 238/// machine operand requires relocation, record the relocation and return zero. 239unsigned ARMCodeEmitter::getMovi32Value(const MachineInstr &MI, 240 const MachineOperand &MO, 241 unsigned Reloc) { 242 assert(((Reloc == ARM::reloc_arm_movt) || (Reloc == ARM::reloc_arm_movw)) 243 && "Relocation to this function should be for movt or movw"); 244 245 if (MO.isImm()) 246 return static_cast<unsigned>(MO.getImm()); 247 else if (MO.isGlobal()) 248 emitGlobalAddress(MO.getGlobal(), Reloc, true, false); 249 else if (MO.isSymbol()) 250 emitExternalSymbolAddress(MO.getSymbolName(), Reloc); 251 else if (MO.isMBB()) 252 emitMachineBasicBlock(MO.getMBB(), Reloc); 253 else { 254#ifndef NDEBUG 255 errs() << MO; 256#endif 257 llvm_unreachable("Unsupported operand type for movw/movt"); 258 } 259 return 0; 260} 261 262/// getMachineOpValue - Return binary encoding of operand. If the machine 263/// operand requires relocation, record the relocation and return zero. 264unsigned ARMCodeEmitter::getMachineOpValue(const MachineInstr &MI, 265 const MachineOperand &MO) { 266 if (MO.isReg()) 267 return getARMRegisterNumbering(MO.getReg()); 268 else if (MO.isImm()) 269 return static_cast<unsigned>(MO.getImm()); 270 else if (MO.isGlobal()) 271 emitGlobalAddress(MO.getGlobal(), ARM::reloc_arm_branch, true, false); 272 else if (MO.isSymbol()) 273 emitExternalSymbolAddress(MO.getSymbolName(), ARM::reloc_arm_branch); 274 else if (MO.isCPI()) { 275 const TargetInstrDesc &TID = MI.getDesc(); 276 // For VFP load, the immediate offset is multiplied by 4. 277 unsigned Reloc = ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPLdStFrm) 278 ? ARM::reloc_arm_vfp_cp_entry : ARM::reloc_arm_cp_entry; 279 emitConstPoolAddress(MO.getIndex(), Reloc); 280 } else if (MO.isJTI()) 281 emitJumpTableAddress(MO.getIndex(), ARM::reloc_arm_relative); 282 else if (MO.isMBB()) 283 emitMachineBasicBlock(MO.getMBB(), ARM::reloc_arm_branch); 284 else { 285#ifndef NDEBUG 286 errs() << MO; 287#endif 288 llvm_unreachable(0); 289 } 290 return 0; 291} 292 293/// emitGlobalAddress - Emit the specified address to the code stream. 294/// 295void ARMCodeEmitter::emitGlobalAddress(const GlobalValue *GV, unsigned Reloc, 296 bool MayNeedFarStub, bool Indirect, 297 intptr_t ACPV) { 298 MachineRelocation MR = Indirect 299 ? MachineRelocation::getIndirectSymbol(MCE.getCurrentPCOffset(), Reloc, 300 const_cast<GlobalValue *>(GV), 301 ACPV, MayNeedFarStub) 302 : MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc, 303 const_cast<GlobalValue *>(GV), ACPV, 304 MayNeedFarStub); 305 MCE.addRelocation(MR); 306} 307 308/// emitExternalSymbolAddress - Arrange for the address of an external symbol to 309/// be emitted to the current location in the function, and allow it to be PC 310/// relative. 311void ARMCodeEmitter::emitExternalSymbolAddress(const char *ES, unsigned Reloc) { 312 MCE.addRelocation(MachineRelocation::getExtSym(MCE.getCurrentPCOffset(), 313 Reloc, ES)); 314} 315 316/// emitConstPoolAddress - Arrange for the address of an constant pool 317/// to be emitted to the current location in the function, and allow it to be PC 318/// relative. 319void ARMCodeEmitter::emitConstPoolAddress(unsigned CPI, unsigned Reloc) { 320 // Tell JIT emitter we'll resolve the address. 321 MCE.addRelocation(MachineRelocation::getConstPool(MCE.getCurrentPCOffset(), 322 Reloc, CPI, 0, true)); 323} 324 325/// emitJumpTableAddress - Arrange for the address of a jump table to 326/// be emitted to the current location in the function, and allow it to be PC 327/// relative. 328void ARMCodeEmitter::emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) { 329 MCE.addRelocation(MachineRelocation::getJumpTable(MCE.getCurrentPCOffset(), 330 Reloc, JTIndex, 0, true)); 331} 332 333/// emitMachineBasicBlock - Emit the specified address basic block. 334void ARMCodeEmitter::emitMachineBasicBlock(MachineBasicBlock *BB, 335 unsigned Reloc, intptr_t JTBase) { 336 MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(), 337 Reloc, BB, JTBase)); 338} 339 340void ARMCodeEmitter::emitWordLE(unsigned Binary) { 341 DEBUG(errs() << " 0x"; 342 errs().write_hex(Binary) << "\n"); 343 MCE.emitWordLE(Binary); 344} 345 346void ARMCodeEmitter::emitDWordLE(uint64_t Binary) { 347 DEBUG(errs() << " 0x"; 348 errs().write_hex(Binary) << "\n"); 349 MCE.emitDWordLE(Binary); 350} 351 352void ARMCodeEmitter::emitInstruction(const MachineInstr &MI) { 353 DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << MI); 354 355 MCE.processDebugLoc(MI.getDebugLoc(), true); 356 357 ++NumEmitted; // Keep track of the # of mi's emitted 358 switch (MI.getDesc().TSFlags & ARMII::FormMask) { 359 default: { 360 llvm_unreachable("Unhandled instruction encoding format!"); 361 break; 362 } 363 case ARMII::Pseudo: 364 emitPseudoInstruction(MI); 365 break; 366 case ARMII::DPFrm: 367 case ARMII::DPSoRegFrm: 368 emitDataProcessingInstruction(MI); 369 break; 370 case ARMII::LdFrm: 371 case ARMII::StFrm: 372 emitLoadStoreInstruction(MI); 373 break; 374 case ARMII::LdMiscFrm: 375 case ARMII::StMiscFrm: 376 emitMiscLoadStoreInstruction(MI); 377 break; 378 case ARMII::LdStMulFrm: 379 emitLoadStoreMultipleInstruction(MI); 380 break; 381 case ARMII::MulFrm: 382 emitMulFrmInstruction(MI); 383 break; 384 case ARMII::ExtFrm: 385 emitExtendInstruction(MI); 386 break; 387 case ARMII::ArithMiscFrm: 388 emitMiscArithInstruction(MI); 389 break; 390 case ARMII::SatFrm: 391 emitSaturateInstruction(MI); 392 break; 393 case ARMII::BrFrm: 394 emitBranchInstruction(MI); 395 break; 396 case ARMII::BrMiscFrm: 397 emitMiscBranchInstruction(MI); 398 break; 399 // VFP instructions. 400 case ARMII::VFPUnaryFrm: 401 case ARMII::VFPBinaryFrm: 402 emitVFPArithInstruction(MI); 403 break; 404 case ARMII::VFPConv1Frm: 405 case ARMII::VFPConv2Frm: 406 case ARMII::VFPConv3Frm: 407 case ARMII::VFPConv4Frm: 408 case ARMII::VFPConv5Frm: 409 emitVFPConversionInstruction(MI); 410 break; 411 case ARMII::VFPLdStFrm: 412 emitVFPLoadStoreInstruction(MI); 413 break; 414 case ARMII::VFPLdStMulFrm: 415 emitVFPLoadStoreMultipleInstruction(MI); 416 break; 417 case ARMII::VFPMiscFrm: 418 emitMiscInstruction(MI); 419 break; 420 // NEON instructions. 421 case ARMII::NGetLnFrm: 422 case ARMII::NSetLnFrm: 423 emitNEONLaneInstruction(MI); 424 break; 425 case ARMII::NDupFrm: 426 emitNEONDupInstruction(MI); 427 break; 428 case ARMII::N1RegModImmFrm: 429 emitNEON1RegModImmInstruction(MI); 430 break; 431 case ARMII::N2RegFrm: 432 emitNEON2RegInstruction(MI); 433 break; 434 case ARMII::N3RegFrm: 435 emitNEON3RegInstruction(MI); 436 break; 437 } 438 MCE.processDebugLoc(MI.getDebugLoc(), false); 439} 440 441void ARMCodeEmitter::emitConstPoolInstruction(const MachineInstr &MI) { 442 unsigned CPI = MI.getOperand(0).getImm(); // CP instruction index. 443 unsigned CPIndex = MI.getOperand(1).getIndex(); // Actual cp entry index. 444 const MachineConstantPoolEntry &MCPE = (*MCPEs)[CPIndex]; 445 446 // Remember the CONSTPOOL_ENTRY address for later relocation. 447 JTI->addConstantPoolEntryAddr(CPI, MCE.getCurrentPCValue()); 448 449 // Emit constpool island entry. In most cases, the actual values will be 450 // resolved and relocated after code emission. 451 if (MCPE.isMachineConstantPoolEntry()) { 452 ARMConstantPoolValue *ACPV = 453 static_cast<ARMConstantPoolValue*>(MCPE.Val.MachineCPVal); 454 455 DEBUG(errs() << " ** ARM constant pool #" << CPI << " @ " 456 << (void*)MCE.getCurrentPCValue() << " " << *ACPV << '\n'); 457 458 assert(ACPV->isGlobalValue() && "unsupported constant pool value"); 459 const GlobalValue *GV = ACPV->getGV(); 460 if (GV) { 461 Reloc::Model RelocM = TM.getRelocationModel(); 462 emitGlobalAddress(GV, ARM::reloc_arm_machine_cp_entry, 463 isa<Function>(GV), 464 Subtarget->GVIsIndirectSymbol(GV, RelocM), 465 (intptr_t)ACPV); 466 } else { 467 emitExternalSymbolAddress(ACPV->getSymbol(), ARM::reloc_arm_absolute); 468 } 469 emitWordLE(0); 470 } else { 471 const Constant *CV = MCPE.Val.ConstVal; 472 473 DEBUG({ 474 errs() << " ** Constant pool #" << CPI << " @ " 475 << (void*)MCE.getCurrentPCValue() << " "; 476 if (const Function *F = dyn_cast<Function>(CV)) 477 errs() << F->getName(); 478 else 479 errs() << *CV; 480 errs() << '\n'; 481 }); 482 483 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) { 484 emitGlobalAddress(GV, ARM::reloc_arm_absolute, isa<Function>(GV), false); 485 emitWordLE(0); 486 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) { 487 uint32_t Val = *(uint32_t*)CI->getValue().getRawData(); 488 emitWordLE(Val); 489 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) { 490 if (CFP->getType()->isFloatTy()) 491 emitWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue()); 492 else if (CFP->getType()->isDoubleTy()) 493 emitDWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue()); 494 else { 495 llvm_unreachable("Unable to handle this constantpool entry!"); 496 } 497 } else { 498 llvm_unreachable("Unable to handle this constantpool entry!"); 499 } 500 } 501} 502 503void ARMCodeEmitter::emitMOVi32immInstruction(const MachineInstr &MI) { 504 const MachineOperand &MO0 = MI.getOperand(0); 505 const MachineOperand &MO1 = MI.getOperand(1); 506 507 // Emit the 'movw' instruction. 508 unsigned Binary = 0x30 << 20; // mov: Insts{27-20} = 0b00110000 509 510 unsigned Lo16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movw) & 0xFFFF; 511 512 // Set the conditional execution predicate. 513 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 514 515 // Encode Rd. 516 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift; 517 518 // Encode imm16 as imm4:imm12 519 Binary |= Lo16 & 0xFFF; // Insts{11-0} = imm12 520 Binary |= ((Lo16 >> 12) & 0xF) << 16; // Insts{19-16} = imm4 521 emitWordLE(Binary); 522 523 unsigned Hi16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movt) >> 16; 524 // Emit the 'movt' instruction. 525 Binary = 0x34 << 20; // movt: Insts{27-20} = 0b00110100 526 527 // Set the conditional execution predicate. 528 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 529 530 // Encode Rd. 531 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift; 532 533 // Encode imm16 as imm4:imm1, same as movw above. 534 Binary |= Hi16 & 0xFFF; 535 Binary |= ((Hi16 >> 12) & 0xF) << 16; 536 emitWordLE(Binary); 537} 538 539void ARMCodeEmitter::emitMOVi2piecesInstruction(const MachineInstr &MI) { 540 const MachineOperand &MO0 = MI.getOperand(0); 541 const MachineOperand &MO1 = MI.getOperand(1); 542 assert(MO1.isImm() && ARM_AM::isSOImmTwoPartVal(MO1.getImm()) && 543 "Not a valid so_imm value!"); 544 unsigned V1 = ARM_AM::getSOImmTwoPartFirst(MO1.getImm()); 545 unsigned V2 = ARM_AM::getSOImmTwoPartSecond(MO1.getImm()); 546 547 // Emit the 'mov' instruction. 548 unsigned Binary = 0xd << 21; // mov: Insts{24-21} = 0b1101 549 550 // Set the conditional execution predicate. 551 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 552 553 // Encode Rd. 554 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift; 555 556 // Encode so_imm. 557 // Set bit I(25) to identify this is the immediate form of <shifter_op> 558 Binary |= 1 << ARMII::I_BitShift; 559 Binary |= getMachineSoImmOpValue(V1); 560 emitWordLE(Binary); 561 562 // Now the 'orr' instruction. 563 Binary = 0xc << 21; // orr: Insts{24-21} = 0b1100 564 565 // Set the conditional execution predicate. 566 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 567 568 // Encode Rd. 569 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift; 570 571 // Encode Rn. 572 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRnShift; 573 574 // Encode so_imm. 575 // Set bit I(25) to identify this is the immediate form of <shifter_op> 576 Binary |= 1 << ARMII::I_BitShift; 577 Binary |= getMachineSoImmOpValue(V2); 578 emitWordLE(Binary); 579} 580 581void ARMCodeEmitter::emitLEApcrelJTInstruction(const MachineInstr &MI) { 582 // It's basically add r, pc, (LJTI - $+8) 583 584 const TargetInstrDesc &TID = MI.getDesc(); 585 586 // Emit the 'add' instruction. 587 unsigned Binary = 0x4 << 21; // add: Insts{24-31} = 0b0100 588 589 // Set the conditional execution predicate 590 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 591 592 // Encode S bit if MI modifies CPSR. 593 Binary |= getAddrModeSBit(MI, TID); 594 595 // Encode Rd. 596 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift; 597 598 // Encode Rn which is PC. 599 Binary |= getARMRegisterNumbering(ARM::PC) << ARMII::RegRnShift; 600 601 // Encode the displacement. 602 Binary |= 1 << ARMII::I_BitShift; 603 emitJumpTableAddress(MI.getOperand(1).getIndex(), ARM::reloc_arm_jt_base); 604 605 emitWordLE(Binary); 606} 607 608void ARMCodeEmitter::emitPseudoMoveInstruction(const MachineInstr &MI) { 609 unsigned Opcode = MI.getDesc().Opcode; 610 611 // Part of binary is determined by TableGn. 612 unsigned Binary = getBinaryCodeForInstr(MI); 613 614 // Set the conditional execution predicate 615 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 616 617 // Encode S bit if MI modifies CPSR. 618 if (Opcode == ARM::MOVsrl_flag || Opcode == ARM::MOVsra_flag) 619 Binary |= 1 << ARMII::S_BitShift; 620 621 // Encode register def if there is one. 622 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift; 623 624 // Encode the shift operation. 625 switch (Opcode) { 626 default: break; 627 case ARM::MOVrx: 628 // rrx 629 Binary |= 0x6 << 4; 630 break; 631 case ARM::MOVsrl_flag: 632 // lsr #1 633 Binary |= (0x2 << 4) | (1 << 7); 634 break; 635 case ARM::MOVsra_flag: 636 // asr #1 637 Binary |= (0x4 << 4) | (1 << 7); 638 break; 639 } 640 641 // Encode register Rm. 642 Binary |= getMachineOpValue(MI, 1); 643 644 emitWordLE(Binary); 645} 646 647void ARMCodeEmitter::addPCLabel(unsigned LabelID) { 648 DEBUG(errs() << " ** LPC" << LabelID << " @ " 649 << (void*)MCE.getCurrentPCValue() << '\n'); 650 JTI->addPCLabelAddr(LabelID, MCE.getCurrentPCValue()); 651} 652 653void ARMCodeEmitter::emitPseudoInstruction(const MachineInstr &MI) { 654 unsigned Opcode = MI.getDesc().Opcode; 655 switch (Opcode) { 656 default: 657 llvm_unreachable("ARMCodeEmitter::emitPseudoInstruction"); 658 case ARM::BX: 659 case ARM::BMOVPCRX: 660 case ARM::BXr9: 661 case ARM::BMOVPCRXr9: { 662 // First emit mov lr, pc 663 unsigned Binary = 0x01a0e00f; 664 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 665 emitWordLE(Binary); 666 667 // and then emit the branch. 668 emitMiscBranchInstruction(MI); 669 break; 670 } 671 case TargetOpcode::INLINEASM: { 672 // We allow inline assembler nodes with empty bodies - they can 673 // implicitly define registers, which is ok for JIT. 674 if (MI.getOperand(0).getSymbolName()[0]) { 675 report_fatal_error("JIT does not support inline asm!"); 676 } 677 break; 678 } 679 case TargetOpcode::PROLOG_LABEL: 680 case TargetOpcode::EH_LABEL: 681 MCE.emitLabel(MI.getOperand(0).getMCSymbol()); 682 break; 683 case TargetOpcode::IMPLICIT_DEF: 684 case TargetOpcode::KILL: 685 // Do nothing. 686 break; 687 case ARM::CONSTPOOL_ENTRY: 688 emitConstPoolInstruction(MI); 689 break; 690 case ARM::PICADD: { 691 // Remember of the address of the PC label for relocation later. 692 addPCLabel(MI.getOperand(2).getImm()); 693 // PICADD is just an add instruction that implicitly read pc. 694 emitDataProcessingInstruction(MI, 0, ARM::PC); 695 break; 696 } 697 case ARM::PICLDR: 698 case ARM::PICLDRB: 699 case ARM::PICSTR: 700 case ARM::PICSTRB: { 701 // Remember of the address of the PC label for relocation later. 702 addPCLabel(MI.getOperand(2).getImm()); 703 // These are just load / store instructions that implicitly read pc. 704 emitLoadStoreInstruction(MI, 0, ARM::PC); 705 break; 706 } 707 case ARM::PICLDRH: 708 case ARM::PICLDRSH: 709 case ARM::PICLDRSB: 710 case ARM::PICSTRH: { 711 // Remember of the address of the PC label for relocation later. 712 addPCLabel(MI.getOperand(2).getImm()); 713 // These are just load / store instructions that implicitly read pc. 714 emitMiscLoadStoreInstruction(MI, ARM::PC); 715 break; 716 } 717 718 case ARM::MOVi32imm: 719 emitMOVi32immInstruction(MI); 720 break; 721 722 case ARM::MOVi2pieces: 723 // Two instructions to materialize a constant. 724 emitMOVi2piecesInstruction(MI); 725 break; 726 case ARM::LEApcrelJT: 727 // Materialize jumptable address. 728 emitLEApcrelJTInstruction(MI); 729 break; 730 case ARM::MOVrx: 731 case ARM::MOVsrl_flag: 732 case ARM::MOVsra_flag: 733 emitPseudoMoveInstruction(MI); 734 break; 735 } 736} 737 738unsigned ARMCodeEmitter::getMachineSoRegOpValue(const MachineInstr &MI, 739 const TargetInstrDesc &TID, 740 const MachineOperand &MO, 741 unsigned OpIdx) { 742 unsigned Binary = getMachineOpValue(MI, MO); 743 744 const MachineOperand &MO1 = MI.getOperand(OpIdx + 1); 745 const MachineOperand &MO2 = MI.getOperand(OpIdx + 2); 746 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO2.getImm()); 747 748 // Encode the shift opcode. 749 unsigned SBits = 0; 750 unsigned Rs = MO1.getReg(); 751 if (Rs) { 752 // Set shift operand (bit[7:4]). 753 // LSL - 0001 754 // LSR - 0011 755 // ASR - 0101 756 // ROR - 0111 757 // RRX - 0110 and bit[11:8] clear. 758 switch (SOpc) { 759 default: llvm_unreachable("Unknown shift opc!"); 760 case ARM_AM::lsl: SBits = 0x1; break; 761 case ARM_AM::lsr: SBits = 0x3; break; 762 case ARM_AM::asr: SBits = 0x5; break; 763 case ARM_AM::ror: SBits = 0x7; break; 764 case ARM_AM::rrx: SBits = 0x6; break; 765 } 766 } else { 767 // Set shift operand (bit[6:4]). 768 // LSL - 000 769 // LSR - 010 770 // ASR - 100 771 // ROR - 110 772 switch (SOpc) { 773 default: llvm_unreachable("Unknown shift opc!"); 774 case ARM_AM::lsl: SBits = 0x0; break; 775 case ARM_AM::lsr: SBits = 0x2; break; 776 case ARM_AM::asr: SBits = 0x4; break; 777 case ARM_AM::ror: SBits = 0x6; break; 778 } 779 } 780 Binary |= SBits << 4; 781 if (SOpc == ARM_AM::rrx) 782 return Binary; 783 784 // Encode the shift operation Rs or shift_imm (except rrx). 785 if (Rs) { 786 // Encode Rs bit[11:8]. 787 assert(ARM_AM::getSORegOffset(MO2.getImm()) == 0); 788 return Binary | (getARMRegisterNumbering(Rs) << ARMII::RegRsShift); 789 } 790 791 // Encode shift_imm bit[11:7]. 792 return Binary | ARM_AM::getSORegOffset(MO2.getImm()) << 7; 793} 794 795unsigned ARMCodeEmitter::getMachineSoImmOpValue(unsigned SoImm) { 796 int SoImmVal = ARM_AM::getSOImmVal(SoImm); 797 assert(SoImmVal != -1 && "Not a valid so_imm value!"); 798 799 // Encode rotate_imm. 800 unsigned Binary = (ARM_AM::getSOImmValRot((unsigned)SoImmVal) >> 1) 801 << ARMII::SoRotImmShift; 802 803 // Encode immed_8. 804 Binary |= ARM_AM::getSOImmValImm((unsigned)SoImmVal); 805 return Binary; 806} 807 808unsigned ARMCodeEmitter::getAddrModeSBit(const MachineInstr &MI, 809 const TargetInstrDesc &TID) const { 810 for (unsigned i = MI.getNumOperands(), e = TID.getNumOperands(); i != e; --i){ 811 const MachineOperand &MO = MI.getOperand(i-1); 812 if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR) 813 return 1 << ARMII::S_BitShift; 814 } 815 return 0; 816} 817 818void ARMCodeEmitter::emitDataProcessingInstruction(const MachineInstr &MI, 819 unsigned ImplicitRd, 820 unsigned ImplicitRn) { 821 const TargetInstrDesc &TID = MI.getDesc(); 822 823 // Part of binary is determined by TableGn. 824 unsigned Binary = getBinaryCodeForInstr(MI); 825 826 // Set the conditional execution predicate 827 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 828 829 // Encode S bit if MI modifies CPSR. 830 Binary |= getAddrModeSBit(MI, TID); 831 832 // Encode register def if there is one. 833 unsigned NumDefs = TID.getNumDefs(); 834 unsigned OpIdx = 0; 835 if (NumDefs) 836 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift; 837 else if (ImplicitRd) 838 // Special handling for implicit use (e.g. PC). 839 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift); 840 841 if (TID.Opcode == ARM::MOVi16) { 842 // Get immediate from MI. 843 unsigned Lo16 = getMovi32Value(MI, MI.getOperand(OpIdx), 844 ARM::reloc_arm_movw); 845 // Encode imm which is the same as in emitMOVi32immInstruction(). 846 Binary |= Lo16 & 0xFFF; 847 Binary |= ((Lo16 >> 12) & 0xF) << 16; 848 emitWordLE(Binary); 849 return; 850 } else if(TID.Opcode == ARM::MOVTi16) { 851 unsigned Hi16 = (getMovi32Value(MI, MI.getOperand(OpIdx), 852 ARM::reloc_arm_movt) >> 16); 853 Binary |= Hi16 & 0xFFF; 854 Binary |= ((Hi16 >> 12) & 0xF) << 16; 855 emitWordLE(Binary); 856 return; 857 } else if ((TID.Opcode == ARM::BFC) || (TID.Opcode == ARM::BFI)) { 858 uint32_t v = ~MI.getOperand(2).getImm(); 859 int32_t lsb = CountTrailingZeros_32(v); 860 int32_t msb = (32 - CountLeadingZeros_32(v)) - 1; 861 // Instr{20-16} = msb, Instr{11-7} = lsb 862 Binary |= (msb & 0x1F) << 16; 863 Binary |= (lsb & 0x1F) << 7; 864 emitWordLE(Binary); 865 return; 866 } else if ((TID.Opcode == ARM::UBFX) || (TID.Opcode == ARM::SBFX)) { 867 // Encode Rn in Instr{0-3} 868 Binary |= getMachineOpValue(MI, OpIdx++); 869 870 uint32_t lsb = MI.getOperand(OpIdx++).getImm(); 871 uint32_t widthm1 = MI.getOperand(OpIdx++).getImm() - 1; 872 873 // Instr{20-16} = widthm1, Instr{11-7} = lsb 874 Binary |= (widthm1 & 0x1F) << 16; 875 Binary |= (lsb & 0x1F) << 7; 876 emitWordLE(Binary); 877 return; 878 } 879 880 // If this is a two-address operand, skip it. e.g. MOVCCr operand 1. 881 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) 882 ++OpIdx; 883 884 // Encode first non-shifter register operand if there is one. 885 bool isUnary = TID.TSFlags & ARMII::UnaryDP; 886 if (!isUnary) { 887 if (ImplicitRn) 888 // Special handling for implicit use (e.g. PC). 889 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift); 890 else { 891 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRnShift; 892 ++OpIdx; 893 } 894 } 895 896 // Encode shifter operand. 897 const MachineOperand &MO = MI.getOperand(OpIdx); 898 if ((TID.TSFlags & ARMII::FormMask) == ARMII::DPSoRegFrm) { 899 // Encode SoReg. 900 emitWordLE(Binary | getMachineSoRegOpValue(MI, TID, MO, OpIdx)); 901 return; 902 } 903 904 if (MO.isReg()) { 905 // Encode register Rm. 906 emitWordLE(Binary | getARMRegisterNumbering(MO.getReg())); 907 return; 908 } 909 910 // Encode so_imm. 911 Binary |= getMachineSoImmOpValue((unsigned)MO.getImm()); 912 913 emitWordLE(Binary); 914} 915 916void ARMCodeEmitter::emitLoadStoreInstruction(const MachineInstr &MI, 917 unsigned ImplicitRd, 918 unsigned ImplicitRn) { 919 const TargetInstrDesc &TID = MI.getDesc(); 920 unsigned Form = TID.TSFlags & ARMII::FormMask; 921 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0; 922 923 // Part of binary is determined by TableGn. 924 unsigned Binary = getBinaryCodeForInstr(MI); 925 926 // Set the conditional execution predicate 927 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 928 929 unsigned OpIdx = 0; 930 931 // Operand 0 of a pre- and post-indexed store is the address base 932 // writeback. Skip it. 933 bool Skipped = false; 934 if (IsPrePost && Form == ARMII::StFrm) { 935 ++OpIdx; 936 Skipped = true; 937 } 938 939 // Set first operand 940 if (ImplicitRd) 941 // Special handling for implicit use (e.g. PC). 942 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift); 943 else 944 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift; 945 946 // Set second operand 947 if (ImplicitRn) 948 // Special handling for implicit use (e.g. PC). 949 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift); 950 else 951 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift; 952 953 // If this is a two-address operand, skip it. e.g. LDR_PRE. 954 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) 955 ++OpIdx; 956 957 const MachineOperand &MO2 = MI.getOperand(OpIdx); 958 unsigned AM2Opc = (ImplicitRn == ARM::PC) 959 ? 0 : MI.getOperand(OpIdx+1).getImm(); 960 961 // Set bit U(23) according to sign of immed value (positive or negative). 962 Binary |= ((ARM_AM::getAM2Op(AM2Opc) == ARM_AM::add ? 1 : 0) << 963 ARMII::U_BitShift); 964 if (!MO2.getReg()) { // is immediate 965 if (ARM_AM::getAM2Offset(AM2Opc)) 966 // Set the value of offset_12 field 967 Binary |= ARM_AM::getAM2Offset(AM2Opc); 968 emitWordLE(Binary); 969 return; 970 } 971 972 // Set bit I(25), because this is not in immediate enconding. 973 Binary |= 1 << ARMII::I_BitShift; 974 assert(TargetRegisterInfo::isPhysicalRegister(MO2.getReg())); 975 // Set bit[3:0] to the corresponding Rm register 976 Binary |= getARMRegisterNumbering(MO2.getReg()); 977 978 // If this instr is in scaled register offset/index instruction, set 979 // shift_immed(bit[11:7]) and shift(bit[6:5]) fields. 980 if (unsigned ShImm = ARM_AM::getAM2Offset(AM2Opc)) { 981 Binary |= getShiftOp(AM2Opc) << ARMII::ShiftImmShift; // shift 982 Binary |= ShImm << ARMII::ShiftShift; // shift_immed 983 } 984 985 emitWordLE(Binary); 986} 987 988void ARMCodeEmitter::emitMiscLoadStoreInstruction(const MachineInstr &MI, 989 unsigned ImplicitRn) { 990 const TargetInstrDesc &TID = MI.getDesc(); 991 unsigned Form = TID.TSFlags & ARMII::FormMask; 992 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0; 993 994 // Part of binary is determined by TableGn. 995 unsigned Binary = getBinaryCodeForInstr(MI); 996 997 // Set the conditional execution predicate 998 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 999 1000 unsigned OpIdx = 0; 1001 1002 // Operand 0 of a pre- and post-indexed store is the address base 1003 // writeback. Skip it. 1004 bool Skipped = false; 1005 if (IsPrePost && Form == ARMII::StMiscFrm) { 1006 ++OpIdx; 1007 Skipped = true; 1008 } 1009 1010 // Set first operand 1011 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift; 1012 1013 // Skip LDRD and STRD's second operand. 1014 if (TID.Opcode == ARM::LDRD || TID.Opcode == ARM::STRD) 1015 ++OpIdx; 1016 1017 // Set second operand 1018 if (ImplicitRn) 1019 // Special handling for implicit use (e.g. PC). 1020 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift); 1021 else 1022 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift; 1023 1024 // If this is a two-address operand, skip it. e.g. LDRH_POST. 1025 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) 1026 ++OpIdx; 1027 1028 const MachineOperand &MO2 = MI.getOperand(OpIdx); 1029 unsigned AM3Opc = (ImplicitRn == ARM::PC) 1030 ? 0 : MI.getOperand(OpIdx+1).getImm(); 1031 1032 // Set bit U(23) according to sign of immed value (positive or negative) 1033 Binary |= ((ARM_AM::getAM3Op(AM3Opc) == ARM_AM::add ? 1 : 0) << 1034 ARMII::U_BitShift); 1035 1036 // If this instr is in register offset/index encoding, set bit[3:0] 1037 // to the corresponding Rm register. 1038 if (MO2.getReg()) { 1039 Binary |= getARMRegisterNumbering(MO2.getReg()); 1040 emitWordLE(Binary); 1041 return; 1042 } 1043 1044 // This instr is in immediate offset/index encoding, set bit 22 to 1. 1045 Binary |= 1 << ARMII::AM3_I_BitShift; 1046 if (unsigned ImmOffs = ARM_AM::getAM3Offset(AM3Opc)) { 1047 // Set operands 1048 Binary |= (ImmOffs >> 4) << ARMII::ImmHiShift; // immedH 1049 Binary |= (ImmOffs & 0xF); // immedL 1050 } 1051 1052 emitWordLE(Binary); 1053} 1054 1055static unsigned getAddrModeUPBits(unsigned Mode) { 1056 unsigned Binary = 0; 1057 1058 // Set addressing mode by modifying bits U(23) and P(24) 1059 // IA - Increment after - bit U = 1 and bit P = 0 1060 // IB - Increment before - bit U = 1 and bit P = 1 1061 // DA - Decrement after - bit U = 0 and bit P = 0 1062 // DB - Decrement before - bit U = 0 and bit P = 1 1063 switch (Mode) { 1064 default: llvm_unreachable("Unknown addressing sub-mode!"); 1065 case ARM_AM::da: break; 1066 case ARM_AM::db: Binary |= 0x1 << ARMII::P_BitShift; break; 1067 case ARM_AM::ia: Binary |= 0x1 << ARMII::U_BitShift; break; 1068 case ARM_AM::ib: Binary |= 0x3 << ARMII::U_BitShift; break; 1069 } 1070 1071 return Binary; 1072} 1073 1074void ARMCodeEmitter::emitLoadStoreMultipleInstruction(const MachineInstr &MI) { 1075 const TargetInstrDesc &TID = MI.getDesc(); 1076 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0; 1077 1078 // Part of binary is determined by TableGn. 1079 unsigned Binary = getBinaryCodeForInstr(MI); 1080 1081 // Set the conditional execution predicate 1082 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1083 1084 // Skip operand 0 of an instruction with base register update. 1085 unsigned OpIdx = 0; 1086 if (IsUpdating) 1087 ++OpIdx; 1088 1089 // Set base address operand 1090 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift; 1091 1092 // Set addressing mode by modifying bits U(23) and P(24) 1093 const MachineOperand &MO = MI.getOperand(OpIdx++); 1094 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(MO.getImm())); 1095 1096 // Set bit W(21) 1097 if (IsUpdating) 1098 Binary |= 0x1 << ARMII::W_BitShift; 1099 1100 // Set registers 1101 for (unsigned i = OpIdx+2, e = MI.getNumOperands(); i != e; ++i) { 1102 const MachineOperand &MO = MI.getOperand(i); 1103 if (!MO.isReg() || MO.isImplicit()) 1104 break; 1105 unsigned RegNum = getARMRegisterNumbering(MO.getReg()); 1106 assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) && 1107 RegNum < 16); 1108 Binary |= 0x1 << RegNum; 1109 } 1110 1111 emitWordLE(Binary); 1112} 1113 1114void ARMCodeEmitter::emitMulFrmInstruction(const MachineInstr &MI) { 1115 const TargetInstrDesc &TID = MI.getDesc(); 1116 1117 // Part of binary is determined by TableGn. 1118 unsigned Binary = getBinaryCodeForInstr(MI); 1119 1120 // Set the conditional execution predicate 1121 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1122 1123 // Encode S bit if MI modifies CPSR. 1124 Binary |= getAddrModeSBit(MI, TID); 1125 1126 // 32x32->64bit operations have two destination registers. The number 1127 // of register definitions will tell us if that's what we're dealing with. 1128 unsigned OpIdx = 0; 1129 if (TID.getNumDefs() == 2) 1130 Binary |= getMachineOpValue (MI, OpIdx++) << ARMII::RegRdLoShift; 1131 1132 // Encode Rd 1133 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdHiShift; 1134 1135 // Encode Rm 1136 Binary |= getMachineOpValue(MI, OpIdx++); 1137 1138 // Encode Rs 1139 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRsShift; 1140 1141 // Many multiple instructions (e.g. MLA) have three src operands. Encode 1142 // it as Rn (for multiply, that's in the same offset as RdLo. 1143 if (TID.getNumOperands() > OpIdx && 1144 !TID.OpInfo[OpIdx].isPredicate() && 1145 !TID.OpInfo[OpIdx].isOptionalDef()) 1146 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRdLoShift; 1147 1148 emitWordLE(Binary); 1149} 1150 1151void ARMCodeEmitter::emitExtendInstruction(const MachineInstr &MI) { 1152 const TargetInstrDesc &TID = MI.getDesc(); 1153 1154 // Part of binary is determined by TableGn. 1155 unsigned Binary = getBinaryCodeForInstr(MI); 1156 1157 // Set the conditional execution predicate 1158 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1159 1160 unsigned OpIdx = 0; 1161 1162 // Encode Rd 1163 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift; 1164 1165 const MachineOperand &MO1 = MI.getOperand(OpIdx++); 1166 const MachineOperand &MO2 = MI.getOperand(OpIdx); 1167 if (MO2.isReg()) { 1168 // Two register operand form. 1169 // Encode Rn. 1170 Binary |= getMachineOpValue(MI, MO1) << ARMII::RegRnShift; 1171 1172 // Encode Rm. 1173 Binary |= getMachineOpValue(MI, MO2); 1174 ++OpIdx; 1175 } else { 1176 Binary |= getMachineOpValue(MI, MO1); 1177 } 1178 1179 // Encode rot imm (0, 8, 16, or 24) if it has a rotate immediate operand. 1180 if (MI.getOperand(OpIdx).isImm() && 1181 !TID.OpInfo[OpIdx].isPredicate() && 1182 !TID.OpInfo[OpIdx].isOptionalDef()) 1183 Binary |= (getMachineOpValue(MI, OpIdx) / 8) << ARMII::ExtRotImmShift; 1184 1185 emitWordLE(Binary); 1186} 1187 1188void ARMCodeEmitter::emitMiscArithInstruction(const MachineInstr &MI) { 1189 const TargetInstrDesc &TID = MI.getDesc(); 1190 1191 // Part of binary is determined by TableGn. 1192 unsigned Binary = getBinaryCodeForInstr(MI); 1193 1194 // Set the conditional execution predicate 1195 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1196 1197 unsigned OpIdx = 0; 1198 1199 // Encode Rd 1200 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift; 1201 1202 const MachineOperand &MO = MI.getOperand(OpIdx++); 1203 if (OpIdx == TID.getNumOperands() || 1204 TID.OpInfo[OpIdx].isPredicate() || 1205 TID.OpInfo[OpIdx].isOptionalDef()) { 1206 // Encode Rm and it's done. 1207 Binary |= getMachineOpValue(MI, MO); 1208 emitWordLE(Binary); 1209 return; 1210 } 1211 1212 // Encode Rn. 1213 Binary |= getMachineOpValue(MI, MO) << ARMII::RegRnShift; 1214 1215 // Encode Rm. 1216 Binary |= getMachineOpValue(MI, OpIdx++); 1217 1218 // Encode shift_imm. 1219 unsigned ShiftAmt = MI.getOperand(OpIdx).getImm(); 1220 if (TID.Opcode == ARM::PKHTB) { 1221 assert(ShiftAmt != 0 && "PKHTB shift_imm is 0!"); 1222 if (ShiftAmt == 32) 1223 ShiftAmt = 0; 1224 } 1225 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!"); 1226 Binary |= ShiftAmt << ARMII::ShiftShift; 1227 1228 emitWordLE(Binary); 1229} 1230 1231void ARMCodeEmitter::emitSaturateInstruction(const MachineInstr &MI) { 1232 const TargetInstrDesc &TID = MI.getDesc(); 1233 1234 // Part of binary is determined by TableGen. 1235 unsigned Binary = getBinaryCodeForInstr(MI); 1236 1237 // Set the conditional execution predicate 1238 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1239 1240 // Encode Rd 1241 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift; 1242 1243 // Encode saturate bit position. 1244 unsigned Pos = MI.getOperand(1).getImm(); 1245 if (TID.Opcode == ARM::SSAT || TID.Opcode == ARM::SSAT16) 1246 Pos -= 1; 1247 assert((Pos < 16 || (Pos < 32 && 1248 TID.Opcode != ARM::SSAT16 && 1249 TID.Opcode != ARM::USAT16)) && 1250 "saturate bit position out of range"); 1251 Binary |= Pos << 16; 1252 1253 // Encode Rm 1254 Binary |= getMachineOpValue(MI, 2); 1255 1256 // Encode shift_imm. 1257 if (TID.getNumOperands() == 4) { 1258 unsigned ShiftOp = MI.getOperand(3).getImm(); 1259 ARM_AM::ShiftOpc Opc = ARM_AM::getSORegShOp(ShiftOp); 1260 if (Opc == ARM_AM::asr) 1261 Binary |= (1 << 6); 1262 unsigned ShiftAmt = MI.getOperand(3).getImm(); 1263 if (ShiftAmt == 32 && Opc == ARM_AM::asr) 1264 ShiftAmt = 0; 1265 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!"); 1266 Binary |= ShiftAmt << ARMII::ShiftShift; 1267 } 1268 1269 emitWordLE(Binary); 1270} 1271 1272void ARMCodeEmitter::emitBranchInstruction(const MachineInstr &MI) { 1273 const TargetInstrDesc &TID = MI.getDesc(); 1274 1275 if (TID.Opcode == ARM::TPsoft) { 1276 llvm_unreachable("ARM::TPsoft FIXME"); // FIXME 1277 } 1278 1279 // Part of binary is determined by TableGn. 1280 unsigned Binary = getBinaryCodeForInstr(MI); 1281 1282 // Set the conditional execution predicate 1283 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1284 1285 // Set signed_immed_24 field 1286 Binary |= getMachineOpValue(MI, 0); 1287 1288 emitWordLE(Binary); 1289} 1290 1291void ARMCodeEmitter::emitInlineJumpTable(unsigned JTIndex) { 1292 // Remember the base address of the inline jump table. 1293 uintptr_t JTBase = MCE.getCurrentPCValue(); 1294 JTI->addJumpTableBaseAddr(JTIndex, JTBase); 1295 DEBUG(errs() << " ** Jump Table #" << JTIndex << " @ " << (void*)JTBase 1296 << '\n'); 1297 1298 // Now emit the jump table entries. 1299 const std::vector<MachineBasicBlock*> &MBBs = (*MJTEs)[JTIndex].MBBs; 1300 for (unsigned i = 0, e = MBBs.size(); i != e; ++i) { 1301 if (IsPIC) 1302 // DestBB address - JT base. 1303 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_pic_jt, JTBase); 1304 else 1305 // Absolute DestBB address. 1306 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_absolute); 1307 emitWordLE(0); 1308 } 1309} 1310 1311void ARMCodeEmitter::emitMiscBranchInstruction(const MachineInstr &MI) { 1312 const TargetInstrDesc &TID = MI.getDesc(); 1313 1314 // Handle jump tables. 1315 if (TID.Opcode == ARM::BR_JTr || TID.Opcode == ARM::BR_JTadd) { 1316 // First emit a ldr pc, [] instruction. 1317 emitDataProcessingInstruction(MI, ARM::PC); 1318 1319 // Then emit the inline jump table. 1320 unsigned JTIndex = 1321 (TID.Opcode == ARM::BR_JTr) 1322 ? MI.getOperand(1).getIndex() : MI.getOperand(2).getIndex(); 1323 emitInlineJumpTable(JTIndex); 1324 return; 1325 } else if (TID.Opcode == ARM::BR_JTm) { 1326 // First emit a ldr pc, [] instruction. 1327 emitLoadStoreInstruction(MI, ARM::PC); 1328 1329 // Then emit the inline jump table. 1330 emitInlineJumpTable(MI.getOperand(3).getIndex()); 1331 return; 1332 } 1333 1334 // Part of binary is determined by TableGn. 1335 unsigned Binary = getBinaryCodeForInstr(MI); 1336 1337 // Set the conditional execution predicate 1338 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1339 1340 if (TID.Opcode == ARM::BX_RET || TID.Opcode == ARM::MOVPCLR) 1341 // The return register is LR. 1342 Binary |= getARMRegisterNumbering(ARM::LR); 1343 else 1344 // otherwise, set the return register 1345 Binary |= getMachineOpValue(MI, 0); 1346 1347 emitWordLE(Binary); 1348} 1349 1350static unsigned encodeVFPRd(const MachineInstr &MI, unsigned OpIdx) { 1351 unsigned RegD = MI.getOperand(OpIdx).getReg(); 1352 unsigned Binary = 0; 1353 bool isSPVFP = ARM::SPRRegisterClass->contains(RegD); 1354 RegD = getARMRegisterNumbering(RegD); 1355 if (!isSPVFP) 1356 Binary |= RegD << ARMII::RegRdShift; 1357 else { 1358 Binary |= ((RegD & 0x1E) >> 1) << ARMII::RegRdShift; 1359 Binary |= (RegD & 0x01) << ARMII::D_BitShift; 1360 } 1361 return Binary; 1362} 1363 1364static unsigned encodeVFPRn(const MachineInstr &MI, unsigned OpIdx) { 1365 unsigned RegN = MI.getOperand(OpIdx).getReg(); 1366 unsigned Binary = 0; 1367 bool isSPVFP = ARM::SPRRegisterClass->contains(RegN); 1368 RegN = getARMRegisterNumbering(RegN); 1369 if (!isSPVFP) 1370 Binary |= RegN << ARMII::RegRnShift; 1371 else { 1372 Binary |= ((RegN & 0x1E) >> 1) << ARMII::RegRnShift; 1373 Binary |= (RegN & 0x01) << ARMII::N_BitShift; 1374 } 1375 return Binary; 1376} 1377 1378static unsigned encodeVFPRm(const MachineInstr &MI, unsigned OpIdx) { 1379 unsigned RegM = MI.getOperand(OpIdx).getReg(); 1380 unsigned Binary = 0; 1381 bool isSPVFP = ARM::SPRRegisterClass->contains(RegM); 1382 RegM = getARMRegisterNumbering(RegM); 1383 if (!isSPVFP) 1384 Binary |= RegM; 1385 else { 1386 Binary |= ((RegM & 0x1E) >> 1); 1387 Binary |= (RegM & 0x01) << ARMII::M_BitShift; 1388 } 1389 return Binary; 1390} 1391 1392void ARMCodeEmitter::emitVFPArithInstruction(const MachineInstr &MI) { 1393 const TargetInstrDesc &TID = MI.getDesc(); 1394 1395 // Part of binary is determined by TableGn. 1396 unsigned Binary = getBinaryCodeForInstr(MI); 1397 1398 // Set the conditional execution predicate 1399 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1400 1401 unsigned OpIdx = 0; 1402 assert((Binary & ARMII::D_BitShift) == 0 && 1403 (Binary & ARMII::N_BitShift) == 0 && 1404 (Binary & ARMII::M_BitShift) == 0 && "VFP encoding bug!"); 1405 1406 // Encode Dd / Sd. 1407 Binary |= encodeVFPRd(MI, OpIdx++); 1408 1409 // If this is a two-address operand, skip it, e.g. FMACD. 1410 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) 1411 ++OpIdx; 1412 1413 // Encode Dn / Sn. 1414 if ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPBinaryFrm) 1415 Binary |= encodeVFPRn(MI, OpIdx++); 1416 1417 if (OpIdx == TID.getNumOperands() || 1418 TID.OpInfo[OpIdx].isPredicate() || 1419 TID.OpInfo[OpIdx].isOptionalDef()) { 1420 // FCMPEZD etc. has only one operand. 1421 emitWordLE(Binary); 1422 return; 1423 } 1424 1425 // Encode Dm / Sm. 1426 Binary |= encodeVFPRm(MI, OpIdx); 1427 1428 emitWordLE(Binary); 1429} 1430 1431void ARMCodeEmitter::emitVFPConversionInstruction(const MachineInstr &MI) { 1432 const TargetInstrDesc &TID = MI.getDesc(); 1433 unsigned Form = TID.TSFlags & ARMII::FormMask; 1434 1435 // Part of binary is determined by TableGn. 1436 unsigned Binary = getBinaryCodeForInstr(MI); 1437 1438 // Set the conditional execution predicate 1439 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1440 1441 switch (Form) { 1442 default: break; 1443 case ARMII::VFPConv1Frm: 1444 case ARMII::VFPConv2Frm: 1445 case ARMII::VFPConv3Frm: 1446 // Encode Dd / Sd. 1447 Binary |= encodeVFPRd(MI, 0); 1448 break; 1449 case ARMII::VFPConv4Frm: 1450 // Encode Dn / Sn. 1451 Binary |= encodeVFPRn(MI, 0); 1452 break; 1453 case ARMII::VFPConv5Frm: 1454 // Encode Dm / Sm. 1455 Binary |= encodeVFPRm(MI, 0); 1456 break; 1457 } 1458 1459 switch (Form) { 1460 default: break; 1461 case ARMII::VFPConv1Frm: 1462 // Encode Dm / Sm. 1463 Binary |= encodeVFPRm(MI, 1); 1464 break; 1465 case ARMII::VFPConv2Frm: 1466 case ARMII::VFPConv3Frm: 1467 // Encode Dn / Sn. 1468 Binary |= encodeVFPRn(MI, 1); 1469 break; 1470 case ARMII::VFPConv4Frm: 1471 case ARMII::VFPConv5Frm: 1472 // Encode Dd / Sd. 1473 Binary |= encodeVFPRd(MI, 1); 1474 break; 1475 } 1476 1477 if (Form == ARMII::VFPConv5Frm) 1478 // Encode Dn / Sn. 1479 Binary |= encodeVFPRn(MI, 2); 1480 else if (Form == ARMII::VFPConv3Frm) 1481 // Encode Dm / Sm. 1482 Binary |= encodeVFPRm(MI, 2); 1483 1484 emitWordLE(Binary); 1485} 1486 1487void ARMCodeEmitter::emitVFPLoadStoreInstruction(const MachineInstr &MI) { 1488 // Part of binary is determined by TableGn. 1489 unsigned Binary = getBinaryCodeForInstr(MI); 1490 1491 // Set the conditional execution predicate 1492 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1493 1494 unsigned OpIdx = 0; 1495 1496 // Encode Dd / Sd. 1497 Binary |= encodeVFPRd(MI, OpIdx++); 1498 1499 // Encode address base. 1500 const MachineOperand &Base = MI.getOperand(OpIdx++); 1501 Binary |= getMachineOpValue(MI, Base) << ARMII::RegRnShift; 1502 1503 // If there is a non-zero immediate offset, encode it. 1504 if (Base.isReg()) { 1505 const MachineOperand &Offset = MI.getOperand(OpIdx); 1506 if (unsigned ImmOffs = ARM_AM::getAM5Offset(Offset.getImm())) { 1507 if (ARM_AM::getAM5Op(Offset.getImm()) == ARM_AM::add) 1508 Binary |= 1 << ARMII::U_BitShift; 1509 Binary |= ImmOffs; 1510 emitWordLE(Binary); 1511 return; 1512 } 1513 } 1514 1515 // If immediate offset is omitted, default to +0. 1516 Binary |= 1 << ARMII::U_BitShift; 1517 1518 emitWordLE(Binary); 1519} 1520 1521void 1522ARMCodeEmitter::emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI) { 1523 const TargetInstrDesc &TID = MI.getDesc(); 1524 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0; 1525 1526 // Part of binary is determined by TableGn. 1527 unsigned Binary = getBinaryCodeForInstr(MI); 1528 1529 // Set the conditional execution predicate 1530 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1531 1532 // Skip operand 0 of an instruction with base register update. 1533 unsigned OpIdx = 0; 1534 if (IsUpdating) 1535 ++OpIdx; 1536 1537 // Set base address operand 1538 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift; 1539 1540 // Set addressing mode by modifying bits U(23) and P(24) 1541 const MachineOperand &MO = MI.getOperand(OpIdx++); 1542 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(MO.getImm())); 1543 1544 // Set bit W(21) 1545 if (IsUpdating) 1546 Binary |= 0x1 << ARMII::W_BitShift; 1547 1548 // First register is encoded in Dd. 1549 Binary |= encodeVFPRd(MI, OpIdx+2); 1550 1551 // Count the number of registers. 1552 unsigned NumRegs = 1; 1553 for (unsigned i = OpIdx+3, e = MI.getNumOperands(); i != e; ++i) { 1554 const MachineOperand &MO = MI.getOperand(i); 1555 if (!MO.isReg() || MO.isImplicit()) 1556 break; 1557 ++NumRegs; 1558 } 1559 // Bit 8 will be set if <list> is consecutive 64-bit registers (e.g., D0) 1560 // Otherwise, it will be 0, in the case of 32-bit registers. 1561 if(Binary & 0x100) 1562 Binary |= NumRegs * 2; 1563 else 1564 Binary |= NumRegs; 1565 1566 emitWordLE(Binary); 1567} 1568 1569void ARMCodeEmitter::emitMiscInstruction(const MachineInstr &MI) { 1570 unsigned Opcode = MI.getDesc().Opcode; 1571 // Part of binary is determined by TableGn. 1572 unsigned Binary = getBinaryCodeForInstr(MI); 1573 1574 // Set the conditional execution predicate 1575 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1576 1577 switch(Opcode) { 1578 default: 1579 llvm_unreachable("ARMCodeEmitter::emitMiscInstruction"); 1580 1581 case ARM::FMSTAT: 1582 // No further encoding needed. 1583 break; 1584 1585 case ARM::VMRS: 1586 case ARM::VMSR: { 1587 const MachineOperand &MO0 = MI.getOperand(0); 1588 // Encode Rt. 1589 Binary |= getARMRegisterNumbering(MO0.getReg()) << ARMII::RegRdShift; 1590 break; 1591 } 1592 1593 case ARM::FCONSTD: 1594 case ARM::FCONSTS: { 1595 // Encode Dd / Sd. 1596 Binary |= encodeVFPRd(MI, 0); 1597 1598 // Encode imm., Table A7-18 VFP modified immediate constants 1599 const MachineOperand &MO1 = MI.getOperand(1); 1600 unsigned Imm = static_cast<unsigned>(MO1.getFPImm()->getValueAPF() 1601 .bitcastToAPInt().getHiBits(32).getLimitedValue()); 1602 unsigned ModifiedImm; 1603 1604 if(Opcode == ARM::FCONSTS) 1605 ModifiedImm = (Imm & 0x80000000) >> 24 | // a 1606 (Imm & 0x03F80000) >> 19; // bcdefgh 1607 else // Opcode == ARM::FCONSTD 1608 ModifiedImm = (Imm & 0x80000000) >> 24 | // a 1609 (Imm & 0x007F0000) >> 16; // bcdefgh 1610 1611 // Insts{19-16} = abcd, Insts{3-0} = efgh 1612 Binary |= ((ModifiedImm & 0xF0) >> 4) << 16; 1613 Binary |= (ModifiedImm & 0xF); 1614 break; 1615 } 1616 } 1617 1618 emitWordLE(Binary); 1619} 1620 1621static unsigned encodeNEONRd(const MachineInstr &MI, unsigned OpIdx) { 1622 unsigned RegD = MI.getOperand(OpIdx).getReg(); 1623 unsigned Binary = 0; 1624 RegD = getARMRegisterNumbering(RegD); 1625 Binary |= (RegD & 0xf) << ARMII::RegRdShift; 1626 Binary |= ((RegD >> 4) & 1) << ARMII::D_BitShift; 1627 return Binary; 1628} 1629 1630static unsigned encodeNEONRn(const MachineInstr &MI, unsigned OpIdx) { 1631 unsigned RegN = MI.getOperand(OpIdx).getReg(); 1632 unsigned Binary = 0; 1633 RegN = getARMRegisterNumbering(RegN); 1634 Binary |= (RegN & 0xf) << ARMII::RegRnShift; 1635 Binary |= ((RegN >> 4) & 1) << ARMII::N_BitShift; 1636 return Binary; 1637} 1638 1639static unsigned encodeNEONRm(const MachineInstr &MI, unsigned OpIdx) { 1640 unsigned RegM = MI.getOperand(OpIdx).getReg(); 1641 unsigned Binary = 0; 1642 RegM = getARMRegisterNumbering(RegM); 1643 Binary |= (RegM & 0xf); 1644 Binary |= ((RegM >> 4) & 1) << ARMII::M_BitShift; 1645 return Binary; 1646} 1647 1648/// convertNEONDataProcToThumb - Convert the ARM mode encoding for a NEON 1649/// data-processing instruction to the corresponding Thumb encoding. 1650static unsigned convertNEONDataProcToThumb(unsigned Binary) { 1651 assert((Binary & 0xfe000000) == 0xf2000000 && 1652 "not an ARM NEON data-processing instruction"); 1653 unsigned UBit = (Binary >> 24) & 1; 1654 return 0xef000000 | (UBit << 28) | (Binary & 0xffffff); 1655} 1656 1657void ARMCodeEmitter::emitNEONLaneInstruction(const MachineInstr &MI) { 1658 unsigned Binary = getBinaryCodeForInstr(MI); 1659 1660 unsigned RegTOpIdx, RegNOpIdx, LnOpIdx; 1661 const TargetInstrDesc &TID = MI.getDesc(); 1662 if ((TID.TSFlags & ARMII::FormMask) == ARMII::NGetLnFrm) { 1663 RegTOpIdx = 0; 1664 RegNOpIdx = 1; 1665 LnOpIdx = 2; 1666 } else { // ARMII::NSetLnFrm 1667 RegTOpIdx = 2; 1668 RegNOpIdx = 0; 1669 LnOpIdx = 3; 1670 } 1671 1672 // Set the conditional execution predicate 1673 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift; 1674 1675 unsigned RegT = MI.getOperand(RegTOpIdx).getReg(); 1676 RegT = getARMRegisterNumbering(RegT); 1677 Binary |= (RegT << ARMII::RegRdShift); 1678 Binary |= encodeNEONRn(MI, RegNOpIdx); 1679 1680 unsigned LaneShift; 1681 if ((Binary & (1 << 22)) != 0) 1682 LaneShift = 0; // 8-bit elements 1683 else if ((Binary & (1 << 5)) != 0) 1684 LaneShift = 1; // 16-bit elements 1685 else 1686 LaneShift = 2; // 32-bit elements 1687 1688 unsigned Lane = MI.getOperand(LnOpIdx).getImm() << LaneShift; 1689 unsigned Opc1 = Lane >> 2; 1690 unsigned Opc2 = Lane & 3; 1691 assert((Opc1 & 3) == 0 && "out-of-range lane number operand"); 1692 Binary |= (Opc1 << 21); 1693 Binary |= (Opc2 << 5); 1694 1695 emitWordLE(Binary); 1696} 1697 1698void ARMCodeEmitter::emitNEONDupInstruction(const MachineInstr &MI) { 1699 unsigned Binary = getBinaryCodeForInstr(MI); 1700 1701 // Set the conditional execution predicate 1702 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift; 1703 1704 unsigned RegT = MI.getOperand(1).getReg(); 1705 RegT = getARMRegisterNumbering(RegT); 1706 Binary |= (RegT << ARMII::RegRdShift); 1707 Binary |= encodeNEONRn(MI, 0); 1708 emitWordLE(Binary); 1709} 1710 1711void ARMCodeEmitter::emitNEON1RegModImmInstruction(const MachineInstr &MI) { 1712 unsigned Binary = getBinaryCodeForInstr(MI); 1713 // Destination register is encoded in Dd. 1714 Binary |= encodeNEONRd(MI, 0); 1715 // Immediate fields: Op, Cmode, I, Imm3, Imm4 1716 unsigned Imm = MI.getOperand(1).getImm(); 1717 unsigned Op = (Imm >> 12) & 1; 1718 unsigned Cmode = (Imm >> 8) & 0xf; 1719 unsigned I = (Imm >> 7) & 1; 1720 unsigned Imm3 = (Imm >> 4) & 0x7; 1721 unsigned Imm4 = Imm & 0xf; 1722 Binary |= (I << 24) | (Imm3 << 16) | (Cmode << 8) | (Op << 5) | Imm4; 1723 if (IsThumb) 1724 Binary = convertNEONDataProcToThumb(Binary); 1725 emitWordLE(Binary); 1726} 1727 1728void ARMCodeEmitter::emitNEON2RegInstruction(const MachineInstr &MI) { 1729 const TargetInstrDesc &TID = MI.getDesc(); 1730 unsigned Binary = getBinaryCodeForInstr(MI); 1731 // Destination register is encoded in Dd; source register in Dm. 1732 unsigned OpIdx = 0; 1733 Binary |= encodeNEONRd(MI, OpIdx++); 1734 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) 1735 ++OpIdx; 1736 Binary |= encodeNEONRm(MI, OpIdx); 1737 if (IsThumb) 1738 Binary = convertNEONDataProcToThumb(Binary); 1739 // FIXME: This does not handle VDUPfdf or VDUPfqf. 1740 emitWordLE(Binary); 1741} 1742 1743void ARMCodeEmitter::emitNEON3RegInstruction(const MachineInstr &MI) { 1744 const TargetInstrDesc &TID = MI.getDesc(); 1745 unsigned Binary = getBinaryCodeForInstr(MI); 1746 // Destination register is encoded in Dd; source registers in Dn and Dm. 1747 unsigned OpIdx = 0; 1748 Binary |= encodeNEONRd(MI, OpIdx++); 1749 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) 1750 ++OpIdx; 1751 Binary |= encodeNEONRn(MI, OpIdx++); 1752 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) 1753 ++OpIdx; 1754 Binary |= encodeNEONRm(MI, OpIdx); 1755 if (IsThumb) 1756 Binary = convertNEONDataProcToThumb(Binary); 1757 // FIXME: This does not handle VMOVDneon or VMOVQ. 1758 emitWordLE(Binary); 1759} 1760 1761#include "ARMGenCodeEmitter.inc" 1762