ARMCodeEmitter.cpp revision 3fea19105d4929ad694f0b6272de31924c9f9f09
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; } 177 178 /// getMovi32Value - Return binary encoding of operand for movw/movt. If the 179 /// machine operand requires relocation, record the relocation and return 180 /// zero. 181 unsigned getMovi32Value(const MachineInstr &MI,const MachineOperand &MO, 182 unsigned Reloc); 183 184 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value. 185 /// 186 unsigned getShiftOp(unsigned Imm) const ; 187 188 /// Routines that handle operands which add machine relocations which are 189 /// fixed up by the relocation stage. 190 void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc, 191 bool MayNeedFarStub, bool Indirect, 192 intptr_t ACPV = 0) const; 193 void emitExternalSymbolAddress(const char *ES, unsigned Reloc) const; 194 void emitConstPoolAddress(unsigned CPI, unsigned Reloc) const; 195 void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const; 196 void emitMachineBasicBlock(MachineBasicBlock *BB, unsigned Reloc, 197 intptr_t JTBase = 0) const; 198 }; 199} 200 201char ARMCodeEmitter::ID = 0; 202 203/// createARMJITCodeEmitterPass - Return a pass that emits the collected ARM 204/// code to the specified MCE object. 205FunctionPass *llvm::createARMJITCodeEmitterPass(ARMBaseTargetMachine &TM, 206 JITCodeEmitter &JCE) { 207 return new ARMCodeEmitter(TM, JCE); 208} 209 210bool ARMCodeEmitter::runOnMachineFunction(MachineFunction &MF) { 211 assert((MF.getTarget().getRelocationModel() != Reloc::Default || 212 MF.getTarget().getRelocationModel() != Reloc::Static) && 213 "JIT relocation model must be set to static or default!"); 214 JTI = ((ARMTargetMachine &)MF.getTarget()).getJITInfo(); 215 II = ((const ARMTargetMachine &)MF.getTarget()).getInstrInfo(); 216 TD = ((const ARMTargetMachine &)MF.getTarget()).getTargetData(); 217 Subtarget = &TM.getSubtarget<ARMSubtarget>(); 218 MCPEs = &MF.getConstantPool()->getConstants(); 219 MJTEs = 0; 220 if (MF.getJumpTableInfo()) MJTEs = &MF.getJumpTableInfo()->getJumpTables(); 221 IsPIC = TM.getRelocationModel() == Reloc::PIC_; 222 IsThumb = MF.getInfo<ARMFunctionInfo>()->isThumbFunction(); 223 JTI->Initialize(MF, IsPIC); 224 MMI = &getAnalysis<MachineModuleInfo>(); 225 MCE.setModuleInfo(MMI); 226 227 do { 228 DEBUG(errs() << "JITTing function '" 229 << MF.getFunction()->getName() << "'\n"); 230 MCE.startFunction(MF); 231 for (MachineFunction::iterator MBB = MF.begin(), E = MF.end(); 232 MBB != E; ++MBB) { 233 MCE.StartMachineBasicBlock(MBB); 234 for (MachineBasicBlock::const_iterator I = MBB->begin(), E = MBB->end(); 235 I != E; ++I) 236 emitInstruction(*I); 237 } 238 } while (MCE.finishFunction(MF)); 239 240 return false; 241} 242 243/// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value. 244/// 245unsigned ARMCodeEmitter::getShiftOp(unsigned Imm) const { 246 switch (ARM_AM::getAM2ShiftOpc(Imm)) { 247 default: llvm_unreachable("Unknown shift opc!"); 248 case ARM_AM::asr: return 2; 249 case ARM_AM::lsl: return 0; 250 case ARM_AM::lsr: return 1; 251 case ARM_AM::ror: 252 case ARM_AM::rrx: return 3; 253 } 254 return 0; 255} 256 257/// getMovi32Value - Return binary encoding of operand for movw/movt. If the 258/// machine operand requires relocation, record the relocation and return zero. 259unsigned ARMCodeEmitter::getMovi32Value(const MachineInstr &MI, 260 const MachineOperand &MO, 261 unsigned Reloc) { 262 assert(((Reloc == ARM::reloc_arm_movt) || (Reloc == ARM::reloc_arm_movw)) 263 && "Relocation to this function should be for movt or movw"); 264 265 if (MO.isImm()) 266 return static_cast<unsigned>(MO.getImm()); 267 else if (MO.isGlobal()) 268 emitGlobalAddress(MO.getGlobal(), Reloc, true, false); 269 else if (MO.isSymbol()) 270 emitExternalSymbolAddress(MO.getSymbolName(), Reloc); 271 else if (MO.isMBB()) 272 emitMachineBasicBlock(MO.getMBB(), Reloc); 273 else { 274#ifndef NDEBUG 275 errs() << MO; 276#endif 277 llvm_unreachable("Unsupported operand type for movw/movt"); 278 } 279 return 0; 280} 281 282/// getMachineOpValue - Return binary encoding of operand. If the machine 283/// operand requires relocation, record the relocation and return zero. 284unsigned ARMCodeEmitter::getMachineOpValue(const MachineInstr &MI, 285 const MachineOperand &MO) const { 286 if (MO.isReg()) 287 return getARMRegisterNumbering(MO.getReg()); 288 else if (MO.isImm()) 289 return static_cast<unsigned>(MO.getImm()); 290 else if (MO.isGlobal()) 291 emitGlobalAddress(MO.getGlobal(), ARM::reloc_arm_branch, true, false); 292 else if (MO.isSymbol()) 293 emitExternalSymbolAddress(MO.getSymbolName(), ARM::reloc_arm_branch); 294 else if (MO.isCPI()) { 295 const TargetInstrDesc &TID = MI.getDesc(); 296 // For VFP load, the immediate offset is multiplied by 4. 297 unsigned Reloc = ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPLdStFrm) 298 ? ARM::reloc_arm_vfp_cp_entry : ARM::reloc_arm_cp_entry; 299 emitConstPoolAddress(MO.getIndex(), Reloc); 300 } else if (MO.isJTI()) 301 emitJumpTableAddress(MO.getIndex(), ARM::reloc_arm_relative); 302 else if (MO.isMBB()) 303 emitMachineBasicBlock(MO.getMBB(), ARM::reloc_arm_branch); 304 else { 305#ifndef NDEBUG 306 errs() << MO; 307#endif 308 llvm_unreachable(0); 309 } 310 return 0; 311} 312 313/// emitGlobalAddress - Emit the specified address to the code stream. 314/// 315void ARMCodeEmitter::emitGlobalAddress(const GlobalValue *GV, unsigned Reloc, 316 bool MayNeedFarStub, bool Indirect, 317 intptr_t ACPV) const { 318 MachineRelocation MR = Indirect 319 ? MachineRelocation::getIndirectSymbol(MCE.getCurrentPCOffset(), Reloc, 320 const_cast<GlobalValue *>(GV), 321 ACPV, MayNeedFarStub) 322 : MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc, 323 const_cast<GlobalValue *>(GV), ACPV, 324 MayNeedFarStub); 325 MCE.addRelocation(MR); 326} 327 328/// emitExternalSymbolAddress - Arrange for the address of an external symbol to 329/// be emitted to the current location in the function, and allow it to be PC 330/// relative. 331void ARMCodeEmitter:: 332emitExternalSymbolAddress(const char *ES, unsigned Reloc) const { 333 MCE.addRelocation(MachineRelocation::getExtSym(MCE.getCurrentPCOffset(), 334 Reloc, ES)); 335} 336 337/// emitConstPoolAddress - Arrange for the address of an constant pool 338/// to be emitted to the current location in the function, and allow it to be PC 339/// relative. 340void ARMCodeEmitter::emitConstPoolAddress(unsigned CPI, unsigned Reloc) const { 341 // Tell JIT emitter we'll resolve the address. 342 MCE.addRelocation(MachineRelocation::getConstPool(MCE.getCurrentPCOffset(), 343 Reloc, CPI, 0, true)); 344} 345 346/// emitJumpTableAddress - Arrange for the address of a jump table to 347/// be emitted to the current location in the function, and allow it to be PC 348/// relative. 349void ARMCodeEmitter:: 350emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const { 351 MCE.addRelocation(MachineRelocation::getJumpTable(MCE.getCurrentPCOffset(), 352 Reloc, JTIndex, 0, true)); 353} 354 355/// emitMachineBasicBlock - Emit the specified address basic block. 356void ARMCodeEmitter::emitMachineBasicBlock(MachineBasicBlock *BB, 357 unsigned Reloc, 358 intptr_t JTBase) const { 359 MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(), 360 Reloc, BB, JTBase)); 361} 362 363void ARMCodeEmitter::emitWordLE(unsigned Binary) { 364 DEBUG(errs() << " 0x"; 365 errs().write_hex(Binary) << "\n"); 366 MCE.emitWordLE(Binary); 367} 368 369void ARMCodeEmitter::emitDWordLE(uint64_t Binary) { 370 DEBUG(errs() << " 0x"; 371 errs().write_hex(Binary) << "\n"); 372 MCE.emitDWordLE(Binary); 373} 374 375void ARMCodeEmitter::emitInstruction(const MachineInstr &MI) { 376 DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << MI); 377 378 MCE.processDebugLoc(MI.getDebugLoc(), true); 379 380 ++NumEmitted; // Keep track of the # of mi's emitted 381 switch (MI.getDesc().TSFlags & ARMII::FormMask) { 382 default: { 383 llvm_unreachable("Unhandled instruction encoding format!"); 384 break; 385 } 386 case ARMII::Pseudo: 387 emitPseudoInstruction(MI); 388 break; 389 case ARMII::DPFrm: 390 case ARMII::DPSoRegFrm: 391 emitDataProcessingInstruction(MI); 392 break; 393 case ARMII::LdFrm: 394 case ARMII::StFrm: 395 emitLoadStoreInstruction(MI); 396 break; 397 case ARMII::LdMiscFrm: 398 case ARMII::StMiscFrm: 399 emitMiscLoadStoreInstruction(MI); 400 break; 401 case ARMII::LdStMulFrm: 402 emitLoadStoreMultipleInstruction(MI); 403 break; 404 case ARMII::MulFrm: 405 emitMulFrmInstruction(MI); 406 break; 407 case ARMII::ExtFrm: 408 emitExtendInstruction(MI); 409 break; 410 case ARMII::ArithMiscFrm: 411 emitMiscArithInstruction(MI); 412 break; 413 case ARMII::SatFrm: 414 emitSaturateInstruction(MI); 415 break; 416 case ARMII::BrFrm: 417 emitBranchInstruction(MI); 418 break; 419 case ARMII::BrMiscFrm: 420 emitMiscBranchInstruction(MI); 421 break; 422 // VFP instructions. 423 case ARMII::VFPUnaryFrm: 424 case ARMII::VFPBinaryFrm: 425 emitVFPArithInstruction(MI); 426 break; 427 case ARMII::VFPConv1Frm: 428 case ARMII::VFPConv2Frm: 429 case ARMII::VFPConv3Frm: 430 case ARMII::VFPConv4Frm: 431 case ARMII::VFPConv5Frm: 432 emitVFPConversionInstruction(MI); 433 break; 434 case ARMII::VFPLdStFrm: 435 emitVFPLoadStoreInstruction(MI); 436 break; 437 case ARMII::VFPLdStMulFrm: 438 emitVFPLoadStoreMultipleInstruction(MI); 439 break; 440 441 // NEON instructions. 442 case ARMII::NGetLnFrm: 443 case ARMII::NSetLnFrm: 444 emitNEONLaneInstruction(MI); 445 break; 446 case ARMII::NDupFrm: 447 emitNEONDupInstruction(MI); 448 break; 449 case ARMII::N1RegModImmFrm: 450 emitNEON1RegModImmInstruction(MI); 451 break; 452 case ARMII::N2RegFrm: 453 emitNEON2RegInstruction(MI); 454 break; 455 case ARMII::N3RegFrm: 456 emitNEON3RegInstruction(MI); 457 break; 458 } 459 MCE.processDebugLoc(MI.getDebugLoc(), false); 460} 461 462void ARMCodeEmitter::emitConstPoolInstruction(const MachineInstr &MI) { 463 unsigned CPI = MI.getOperand(0).getImm(); // CP instruction index. 464 unsigned CPIndex = MI.getOperand(1).getIndex(); // Actual cp entry index. 465 const MachineConstantPoolEntry &MCPE = (*MCPEs)[CPIndex]; 466 467 // Remember the CONSTPOOL_ENTRY address for later relocation. 468 JTI->addConstantPoolEntryAddr(CPI, MCE.getCurrentPCValue()); 469 470 // Emit constpool island entry. In most cases, the actual values will be 471 // resolved and relocated after code emission. 472 if (MCPE.isMachineConstantPoolEntry()) { 473 ARMConstantPoolValue *ACPV = 474 static_cast<ARMConstantPoolValue*>(MCPE.Val.MachineCPVal); 475 476 DEBUG(errs() << " ** ARM constant pool #" << CPI << " @ " 477 << (void*)MCE.getCurrentPCValue() << " " << *ACPV << '\n'); 478 479 assert(ACPV->isGlobalValue() && "unsupported constant pool value"); 480 const GlobalValue *GV = ACPV->getGV(); 481 if (GV) { 482 Reloc::Model RelocM = TM.getRelocationModel(); 483 emitGlobalAddress(GV, ARM::reloc_arm_machine_cp_entry, 484 isa<Function>(GV), 485 Subtarget->GVIsIndirectSymbol(GV, RelocM), 486 (intptr_t)ACPV); 487 } else { 488 emitExternalSymbolAddress(ACPV->getSymbol(), ARM::reloc_arm_absolute); 489 } 490 emitWordLE(0); 491 } else { 492 const Constant *CV = MCPE.Val.ConstVal; 493 494 DEBUG({ 495 errs() << " ** Constant pool #" << CPI << " @ " 496 << (void*)MCE.getCurrentPCValue() << " "; 497 if (const Function *F = dyn_cast<Function>(CV)) 498 errs() << F->getName(); 499 else 500 errs() << *CV; 501 errs() << '\n'; 502 }); 503 504 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) { 505 emitGlobalAddress(GV, ARM::reloc_arm_absolute, isa<Function>(GV), false); 506 emitWordLE(0); 507 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) { 508 uint32_t Val = *(uint32_t*)CI->getValue().getRawData(); 509 emitWordLE(Val); 510 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) { 511 if (CFP->getType()->isFloatTy()) 512 emitWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue()); 513 else if (CFP->getType()->isDoubleTy()) 514 emitDWordLE(CFP->getValueAPF().bitcastToAPInt().getZExtValue()); 515 else { 516 llvm_unreachable("Unable to handle this constantpool entry!"); 517 } 518 } else { 519 llvm_unreachable("Unable to handle this constantpool entry!"); 520 } 521 } 522} 523 524void ARMCodeEmitter::emitMOVi32immInstruction(const MachineInstr &MI) { 525 const MachineOperand &MO0 = MI.getOperand(0); 526 const MachineOperand &MO1 = MI.getOperand(1); 527 528 // Emit the 'movw' instruction. 529 unsigned Binary = 0x30 << 20; // mov: Insts{27-20} = 0b00110000 530 531 unsigned Lo16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movw) & 0xFFFF; 532 533 // Set the conditional execution predicate. 534 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 535 536 // Encode Rd. 537 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift; 538 539 // Encode imm16 as imm4:imm12 540 Binary |= Lo16 & 0xFFF; // Insts{11-0} = imm12 541 Binary |= ((Lo16 >> 12) & 0xF) << 16; // Insts{19-16} = imm4 542 emitWordLE(Binary); 543 544 unsigned Hi16 = getMovi32Value(MI, MO1, ARM::reloc_arm_movt) >> 16; 545 // Emit the 'movt' instruction. 546 Binary = 0x34 << 20; // movt: Insts{27-20} = 0b00110100 547 548 // Set the conditional execution predicate. 549 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 550 551 // Encode Rd. 552 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift; 553 554 // Encode imm16 as imm4:imm1, same as movw above. 555 Binary |= Hi16 & 0xFFF; 556 Binary |= ((Hi16 >> 12) & 0xF) << 16; 557 emitWordLE(Binary); 558} 559 560void ARMCodeEmitter::emitMOVi2piecesInstruction(const MachineInstr &MI) { 561 const MachineOperand &MO0 = MI.getOperand(0); 562 const MachineOperand &MO1 = MI.getOperand(1); 563 assert(MO1.isImm() && ARM_AM::isSOImmTwoPartVal(MO1.getImm()) && 564 "Not a valid so_imm value!"); 565 unsigned V1 = ARM_AM::getSOImmTwoPartFirst(MO1.getImm()); 566 unsigned V2 = ARM_AM::getSOImmTwoPartSecond(MO1.getImm()); 567 568 // Emit the 'mov' instruction. 569 unsigned Binary = 0xd << 21; // mov: Insts{24-21} = 0b1101 570 571 // Set the conditional execution predicate. 572 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 573 574 // Encode Rd. 575 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift; 576 577 // Encode so_imm. 578 // Set bit I(25) to identify this is the immediate form of <shifter_op> 579 Binary |= 1 << ARMII::I_BitShift; 580 Binary |= getMachineSoImmOpValue(V1); 581 emitWordLE(Binary); 582 583 // Now the 'orr' instruction. 584 Binary = 0xc << 21; // orr: Insts{24-21} = 0b1100 585 586 // Set the conditional execution predicate. 587 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 588 589 // Encode Rd. 590 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRdShift; 591 592 // Encode Rn. 593 Binary |= getMachineOpValue(MI, MO0) << ARMII::RegRnShift; 594 595 // Encode so_imm. 596 // Set bit I(25) to identify this is the immediate form of <shifter_op> 597 Binary |= 1 << ARMII::I_BitShift; 598 Binary |= getMachineSoImmOpValue(V2); 599 emitWordLE(Binary); 600} 601 602void ARMCodeEmitter::emitLEApcrelJTInstruction(const MachineInstr &MI) { 603 // It's basically add r, pc, (LJTI - $+8) 604 605 const TargetInstrDesc &TID = MI.getDesc(); 606 607 // Emit the 'add' instruction. 608 unsigned Binary = 0x4 << 21; // add: Insts{24-31} = 0b0100 609 610 // Set the conditional execution predicate 611 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 612 613 // Encode S bit if MI modifies CPSR. 614 Binary |= getAddrModeSBit(MI, TID); 615 616 // Encode Rd. 617 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift; 618 619 // Encode Rn which is PC. 620 Binary |= getARMRegisterNumbering(ARM::PC) << ARMII::RegRnShift; 621 622 // Encode the displacement. 623 Binary |= 1 << ARMII::I_BitShift; 624 emitJumpTableAddress(MI.getOperand(1).getIndex(), ARM::reloc_arm_jt_base); 625 626 emitWordLE(Binary); 627} 628 629void ARMCodeEmitter::emitPseudoMoveInstruction(const MachineInstr &MI) { 630 unsigned Opcode = MI.getDesc().Opcode; 631 632 // Part of binary is determined by TableGn. 633 unsigned Binary = getBinaryCodeForInstr(MI); 634 635 // Set the conditional execution predicate 636 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 637 638 // Encode S bit if MI modifies CPSR. 639 if (Opcode == ARM::MOVsrl_flag || Opcode == ARM::MOVsra_flag) 640 Binary |= 1 << ARMII::S_BitShift; 641 642 // Encode register def if there is one. 643 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift; 644 645 // Encode the shift operation. 646 switch (Opcode) { 647 default: break; 648 case ARM::RRX: 649 // rrx 650 Binary |= 0x6 << 4; 651 break; 652 case ARM::MOVsrl_flag: 653 // lsr #1 654 Binary |= (0x2 << 4) | (1 << 7); 655 break; 656 case ARM::MOVsra_flag: 657 // asr #1 658 Binary |= (0x4 << 4) | (1 << 7); 659 break; 660 } 661 662 // Encode register Rm. 663 Binary |= getMachineOpValue(MI, 1); 664 665 emitWordLE(Binary); 666} 667 668void ARMCodeEmitter::addPCLabel(unsigned LabelID) { 669 DEBUG(errs() << " ** LPC" << LabelID << " @ " 670 << (void*)MCE.getCurrentPCValue() << '\n'); 671 JTI->addPCLabelAddr(LabelID, MCE.getCurrentPCValue()); 672} 673 674void ARMCodeEmitter::emitPseudoInstruction(const MachineInstr &MI) { 675 unsigned Opcode = MI.getDesc().Opcode; 676 switch (Opcode) { 677 default: 678 llvm_unreachable("ARMCodeEmitter::emitPseudoInstruction"); 679 case ARM::BX: 680 case ARM::BMOVPCRX: 681 case ARM::BXr9: 682 case ARM::BMOVPCRXr9: { 683 // First emit mov lr, pc 684 unsigned Binary = 0x01a0e00f; 685 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 686 emitWordLE(Binary); 687 688 // and then emit the branch. 689 emitMiscBranchInstruction(MI); 690 break; 691 } 692 case TargetOpcode::INLINEASM: { 693 // We allow inline assembler nodes with empty bodies - they can 694 // implicitly define registers, which is ok for JIT. 695 if (MI.getOperand(0).getSymbolName()[0]) { 696 report_fatal_error("JIT does not support inline asm!"); 697 } 698 break; 699 } 700 case TargetOpcode::PROLOG_LABEL: 701 case TargetOpcode::EH_LABEL: 702 MCE.emitLabel(MI.getOperand(0).getMCSymbol()); 703 break; 704 case TargetOpcode::IMPLICIT_DEF: 705 case TargetOpcode::KILL: 706 // Do nothing. 707 break; 708 case ARM::CONSTPOOL_ENTRY: 709 emitConstPoolInstruction(MI); 710 break; 711 case ARM::PICADD: { 712 // Remember of the address of the PC label for relocation later. 713 addPCLabel(MI.getOperand(2).getImm()); 714 // PICADD is just an add instruction that implicitly read pc. 715 emitDataProcessingInstruction(MI, 0, ARM::PC); 716 break; 717 } 718 case ARM::PICLDR: 719 case ARM::PICLDRB: 720 case ARM::PICSTR: 721 case ARM::PICSTRB: { 722 // Remember of the address of the PC label for relocation later. 723 addPCLabel(MI.getOperand(2).getImm()); 724 // These are just load / store instructions that implicitly read pc. 725 emitLoadStoreInstruction(MI, 0, ARM::PC); 726 break; 727 } 728 case ARM::PICLDRH: 729 case ARM::PICLDRSH: 730 case ARM::PICLDRSB: 731 case ARM::PICSTRH: { 732 // Remember of the address of the PC label for relocation later. 733 addPCLabel(MI.getOperand(2).getImm()); 734 // These are just load / store instructions that implicitly read pc. 735 emitMiscLoadStoreInstruction(MI, ARM::PC); 736 break; 737 } 738 739 case ARM::MOVi32imm: 740 emitMOVi32immInstruction(MI); 741 break; 742 743 case ARM::MOVi2pieces: 744 // Two instructions to materialize a constant. 745 emitMOVi2piecesInstruction(MI); 746 break; 747 case ARM::LEApcrelJT: 748 // Materialize jumptable address. 749 emitLEApcrelJTInstruction(MI); 750 break; 751 case ARM::RRX: 752 case ARM::MOVsrl_flag: 753 case ARM::MOVsra_flag: 754 emitPseudoMoveInstruction(MI); 755 break; 756 } 757} 758 759unsigned ARMCodeEmitter::getMachineSoRegOpValue(const MachineInstr &MI, 760 const TargetInstrDesc &TID, 761 const MachineOperand &MO, 762 unsigned OpIdx) { 763 unsigned Binary = getMachineOpValue(MI, MO); 764 765 const MachineOperand &MO1 = MI.getOperand(OpIdx + 1); 766 const MachineOperand &MO2 = MI.getOperand(OpIdx + 2); 767 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO2.getImm()); 768 769 // Encode the shift opcode. 770 unsigned SBits = 0; 771 unsigned Rs = MO1.getReg(); 772 if (Rs) { 773 // Set shift operand (bit[7:4]). 774 // LSL - 0001 775 // LSR - 0011 776 // ASR - 0101 777 // ROR - 0111 778 // RRX - 0110 and bit[11:8] clear. 779 switch (SOpc) { 780 default: llvm_unreachable("Unknown shift opc!"); 781 case ARM_AM::lsl: SBits = 0x1; break; 782 case ARM_AM::lsr: SBits = 0x3; break; 783 case ARM_AM::asr: SBits = 0x5; break; 784 case ARM_AM::ror: SBits = 0x7; break; 785 case ARM_AM::rrx: SBits = 0x6; break; 786 } 787 } else { 788 // Set shift operand (bit[6:4]). 789 // LSL - 000 790 // LSR - 010 791 // ASR - 100 792 // ROR - 110 793 switch (SOpc) { 794 default: llvm_unreachable("Unknown shift opc!"); 795 case ARM_AM::lsl: SBits = 0x0; break; 796 case ARM_AM::lsr: SBits = 0x2; break; 797 case ARM_AM::asr: SBits = 0x4; break; 798 case ARM_AM::ror: SBits = 0x6; break; 799 } 800 } 801 Binary |= SBits << 4; 802 if (SOpc == ARM_AM::rrx) 803 return Binary; 804 805 // Encode the shift operation Rs or shift_imm (except rrx). 806 if (Rs) { 807 // Encode Rs bit[11:8]. 808 assert(ARM_AM::getSORegOffset(MO2.getImm()) == 0); 809 return Binary | (getARMRegisterNumbering(Rs) << ARMII::RegRsShift); 810 } 811 812 // Encode shift_imm bit[11:7]. 813 return Binary | ARM_AM::getSORegOffset(MO2.getImm()) << 7; 814} 815 816unsigned ARMCodeEmitter::getMachineSoImmOpValue(unsigned SoImm) { 817 int SoImmVal = ARM_AM::getSOImmVal(SoImm); 818 assert(SoImmVal != -1 && "Not a valid so_imm value!"); 819 820 // Encode rotate_imm. 821 unsigned Binary = (ARM_AM::getSOImmValRot((unsigned)SoImmVal) >> 1) 822 << ARMII::SoRotImmShift; 823 824 // Encode immed_8. 825 Binary |= ARM_AM::getSOImmValImm((unsigned)SoImmVal); 826 return Binary; 827} 828 829unsigned ARMCodeEmitter::getAddrModeSBit(const MachineInstr &MI, 830 const TargetInstrDesc &TID) const { 831 for (unsigned i = MI.getNumOperands(), e = TID.getNumOperands(); i != e; --i){ 832 const MachineOperand &MO = MI.getOperand(i-1); 833 if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR) 834 return 1 << ARMII::S_BitShift; 835 } 836 return 0; 837} 838 839void ARMCodeEmitter::emitDataProcessingInstruction(const MachineInstr &MI, 840 unsigned ImplicitRd, 841 unsigned ImplicitRn) { 842 const TargetInstrDesc &TID = MI.getDesc(); 843 844 // Part of binary is determined by TableGn. 845 unsigned Binary = getBinaryCodeForInstr(MI); 846 847 // Set the conditional execution predicate 848 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 849 850 // Encode S bit if MI modifies CPSR. 851 Binary |= getAddrModeSBit(MI, TID); 852 853 // Encode register def if there is one. 854 unsigned NumDefs = TID.getNumDefs(); 855 unsigned OpIdx = 0; 856 if (NumDefs) 857 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift; 858 else if (ImplicitRd) 859 // Special handling for implicit use (e.g. PC). 860 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift); 861 862 if (TID.Opcode == ARM::MOVi16) { 863 // Get immediate from MI. 864 unsigned Lo16 = getMovi32Value(MI, MI.getOperand(OpIdx), 865 ARM::reloc_arm_movw); 866 // Encode imm which is the same as in emitMOVi32immInstruction(). 867 Binary |= Lo16 & 0xFFF; 868 Binary |= ((Lo16 >> 12) & 0xF) << 16; 869 emitWordLE(Binary); 870 return; 871 } else if(TID.Opcode == ARM::MOVTi16) { 872 unsigned Hi16 = (getMovi32Value(MI, MI.getOperand(OpIdx), 873 ARM::reloc_arm_movt) >> 16); 874 Binary |= Hi16 & 0xFFF; 875 Binary |= ((Hi16 >> 12) & 0xF) << 16; 876 emitWordLE(Binary); 877 return; 878 } else if ((TID.Opcode == ARM::BFC) || (TID.Opcode == ARM::BFI)) { 879 uint32_t v = ~MI.getOperand(2).getImm(); 880 int32_t lsb = CountTrailingZeros_32(v); 881 int32_t msb = (32 - CountLeadingZeros_32(v)) - 1; 882 // Instr{20-16} = msb, Instr{11-7} = lsb 883 Binary |= (msb & 0x1F) << 16; 884 Binary |= (lsb & 0x1F) << 7; 885 emitWordLE(Binary); 886 return; 887 } else if ((TID.Opcode == ARM::UBFX) || (TID.Opcode == ARM::SBFX)) { 888 // Encode Rn in Instr{0-3} 889 Binary |= getMachineOpValue(MI, OpIdx++); 890 891 uint32_t lsb = MI.getOperand(OpIdx++).getImm(); 892 uint32_t widthm1 = MI.getOperand(OpIdx++).getImm() - 1; 893 894 // Instr{20-16} = widthm1, Instr{11-7} = lsb 895 Binary |= (widthm1 & 0x1F) << 16; 896 Binary |= (lsb & 0x1F) << 7; 897 emitWordLE(Binary); 898 return; 899 } 900 901 // If this is a two-address operand, skip it. e.g. MOVCCr operand 1. 902 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) 903 ++OpIdx; 904 905 // Encode first non-shifter register operand if there is one. 906 bool isUnary = TID.TSFlags & ARMII::UnaryDP; 907 if (!isUnary) { 908 if (ImplicitRn) 909 // Special handling for implicit use (e.g. PC). 910 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift); 911 else { 912 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRnShift; 913 ++OpIdx; 914 } 915 } 916 917 // Encode shifter operand. 918 const MachineOperand &MO = MI.getOperand(OpIdx); 919 if ((TID.TSFlags & ARMII::FormMask) == ARMII::DPSoRegFrm) { 920 // Encode SoReg. 921 emitWordLE(Binary | getMachineSoRegOpValue(MI, TID, MO, OpIdx)); 922 return; 923 } 924 925 if (MO.isReg()) { 926 // Encode register Rm. 927 emitWordLE(Binary | getARMRegisterNumbering(MO.getReg())); 928 return; 929 } 930 931 // Encode so_imm. 932 Binary |= getMachineSoImmOpValue((unsigned)MO.getImm()); 933 934 emitWordLE(Binary); 935} 936 937void ARMCodeEmitter::emitLoadStoreInstruction(const MachineInstr &MI, 938 unsigned ImplicitRd, 939 unsigned ImplicitRn) { 940 const TargetInstrDesc &TID = MI.getDesc(); 941 unsigned Form = TID.TSFlags & ARMII::FormMask; 942 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0; 943 944 // Part of binary is determined by TableGn. 945 unsigned Binary = getBinaryCodeForInstr(MI); 946 947 // Set the conditional execution predicate 948 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 949 950 unsigned OpIdx = 0; 951 952 // Operand 0 of a pre- and post-indexed store is the address base 953 // writeback. Skip it. 954 bool Skipped = false; 955 if (IsPrePost && Form == ARMII::StFrm) { 956 ++OpIdx; 957 Skipped = true; 958 } 959 960 // Set first operand 961 if (ImplicitRd) 962 // Special handling for implicit use (e.g. PC). 963 Binary |= (getARMRegisterNumbering(ImplicitRd) << ARMII::RegRdShift); 964 else 965 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift; 966 967 // Set second operand 968 if (ImplicitRn) 969 // Special handling for implicit use (e.g. PC). 970 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift); 971 else 972 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift; 973 974 // If this is a two-address operand, skip it. e.g. LDR_PRE. 975 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) 976 ++OpIdx; 977 978 const MachineOperand &MO2 = MI.getOperand(OpIdx); 979 unsigned AM2Opc = (ImplicitRn == ARM::PC) 980 ? 0 : MI.getOperand(OpIdx+1).getImm(); 981 982 // Set bit U(23) according to sign of immed value (positive or negative). 983 Binary |= ((ARM_AM::getAM2Op(AM2Opc) == ARM_AM::add ? 1 : 0) << 984 ARMII::U_BitShift); 985 if (!MO2.getReg()) { // is immediate 986 if (ARM_AM::getAM2Offset(AM2Opc)) 987 // Set the value of offset_12 field 988 Binary |= ARM_AM::getAM2Offset(AM2Opc); 989 emitWordLE(Binary); 990 return; 991 } 992 993 // Set bit I(25), because this is not in immediate encoding. 994 Binary |= 1 << ARMII::I_BitShift; 995 assert(TargetRegisterInfo::isPhysicalRegister(MO2.getReg())); 996 // Set bit[3:0] to the corresponding Rm register 997 Binary |= getARMRegisterNumbering(MO2.getReg()); 998 999 // If this instr is in scaled register offset/index instruction, set 1000 // shift_immed(bit[11:7]) and shift(bit[6:5]) fields. 1001 if (unsigned ShImm = ARM_AM::getAM2Offset(AM2Opc)) { 1002 Binary |= getShiftOp(AM2Opc) << ARMII::ShiftImmShift; // shift 1003 Binary |= ShImm << ARMII::ShiftShift; // shift_immed 1004 } 1005 1006 emitWordLE(Binary); 1007} 1008 1009void ARMCodeEmitter::emitMiscLoadStoreInstruction(const MachineInstr &MI, 1010 unsigned ImplicitRn) { 1011 const TargetInstrDesc &TID = MI.getDesc(); 1012 unsigned Form = TID.TSFlags & ARMII::FormMask; 1013 bool IsPrePost = (TID.TSFlags & ARMII::IndexModeMask) != 0; 1014 1015 // Part of binary is determined by TableGn. 1016 unsigned Binary = getBinaryCodeForInstr(MI); 1017 1018 // Set the conditional execution predicate 1019 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1020 1021 unsigned OpIdx = 0; 1022 1023 // Operand 0 of a pre- and post-indexed store is the address base 1024 // writeback. Skip it. 1025 bool Skipped = false; 1026 if (IsPrePost && Form == ARMII::StMiscFrm) { 1027 ++OpIdx; 1028 Skipped = true; 1029 } 1030 1031 // Set first operand 1032 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift; 1033 1034 // Skip LDRD and STRD's second operand. 1035 if (TID.Opcode == ARM::LDRD || TID.Opcode == ARM::STRD) 1036 ++OpIdx; 1037 1038 // Set second operand 1039 if (ImplicitRn) 1040 // Special handling for implicit use (e.g. PC). 1041 Binary |= (getARMRegisterNumbering(ImplicitRn) << ARMII::RegRnShift); 1042 else 1043 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift; 1044 1045 // If this is a two-address operand, skip it. e.g. LDRH_POST. 1046 if (!Skipped && TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) 1047 ++OpIdx; 1048 1049 const MachineOperand &MO2 = MI.getOperand(OpIdx); 1050 unsigned AM3Opc = (ImplicitRn == ARM::PC) 1051 ? 0 : MI.getOperand(OpIdx+1).getImm(); 1052 1053 // Set bit U(23) according to sign of immed value (positive or negative) 1054 Binary |= ((ARM_AM::getAM3Op(AM3Opc) == ARM_AM::add ? 1 : 0) << 1055 ARMII::U_BitShift); 1056 1057 // If this instr is in register offset/index encoding, set bit[3:0] 1058 // to the corresponding Rm register. 1059 if (MO2.getReg()) { 1060 Binary |= getARMRegisterNumbering(MO2.getReg()); 1061 emitWordLE(Binary); 1062 return; 1063 } 1064 1065 // This instr is in immediate offset/index encoding, set bit 22 to 1. 1066 Binary |= 1 << ARMII::AM3_I_BitShift; 1067 if (unsigned ImmOffs = ARM_AM::getAM3Offset(AM3Opc)) { 1068 // Set operands 1069 Binary |= (ImmOffs >> 4) << ARMII::ImmHiShift; // immedH 1070 Binary |= (ImmOffs & 0xF); // immedL 1071 } 1072 1073 emitWordLE(Binary); 1074} 1075 1076static unsigned getAddrModeUPBits(unsigned Mode) { 1077 unsigned Binary = 0; 1078 1079 // Set addressing mode by modifying bits U(23) and P(24) 1080 // IA - Increment after - bit U = 1 and bit P = 0 1081 // IB - Increment before - bit U = 1 and bit P = 1 1082 // DA - Decrement after - bit U = 0 and bit P = 0 1083 // DB - Decrement before - bit U = 0 and bit P = 1 1084 switch (Mode) { 1085 default: llvm_unreachable("Unknown addressing sub-mode!"); 1086 case ARM_AM::da: break; 1087 case ARM_AM::db: Binary |= 0x1 << ARMII::P_BitShift; break; 1088 case ARM_AM::ia: Binary |= 0x1 << ARMII::U_BitShift; break; 1089 case ARM_AM::ib: Binary |= 0x3 << ARMII::U_BitShift; break; 1090 } 1091 1092 return Binary; 1093} 1094 1095void ARMCodeEmitter::emitLoadStoreMultipleInstruction(const MachineInstr &MI) { 1096 const TargetInstrDesc &TID = MI.getDesc(); 1097 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0; 1098 1099 // Part of binary is determined by TableGn. 1100 unsigned Binary = getBinaryCodeForInstr(MI); 1101 1102 // Set the conditional execution predicate 1103 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1104 1105 // Skip operand 0 of an instruction with base register update. 1106 unsigned OpIdx = 0; 1107 if (IsUpdating) 1108 ++OpIdx; 1109 1110 // Set base address operand 1111 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift; 1112 1113 // Set addressing mode by modifying bits U(23) and P(24) 1114 const MachineOperand &MO = MI.getOperand(OpIdx++); 1115 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(MO.getImm())); 1116 1117 // Set bit W(21) 1118 if (IsUpdating) 1119 Binary |= 0x1 << ARMII::W_BitShift; 1120 1121 // Set registers 1122 for (unsigned i = OpIdx+2, e = MI.getNumOperands(); i != e; ++i) { 1123 const MachineOperand &MO = MI.getOperand(i); 1124 if (!MO.isReg() || MO.isImplicit()) 1125 break; 1126 unsigned RegNum = getARMRegisterNumbering(MO.getReg()); 1127 assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) && 1128 RegNum < 16); 1129 Binary |= 0x1 << RegNum; 1130 } 1131 1132 emitWordLE(Binary); 1133} 1134 1135void ARMCodeEmitter::emitMulFrmInstruction(const MachineInstr &MI) { 1136 const TargetInstrDesc &TID = MI.getDesc(); 1137 1138 // Part of binary is determined by TableGn. 1139 unsigned Binary = getBinaryCodeForInstr(MI); 1140 1141 // Set the conditional execution predicate 1142 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1143 1144 // Encode S bit if MI modifies CPSR. 1145 Binary |= getAddrModeSBit(MI, TID); 1146 1147 // 32x32->64bit operations have two destination registers. The number 1148 // of register definitions will tell us if that's what we're dealing with. 1149 unsigned OpIdx = 0; 1150 if (TID.getNumDefs() == 2) 1151 Binary |= getMachineOpValue (MI, OpIdx++) << ARMII::RegRdLoShift; 1152 1153 // Encode Rd 1154 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdHiShift; 1155 1156 // Encode Rm 1157 Binary |= getMachineOpValue(MI, OpIdx++); 1158 1159 // Encode Rs 1160 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRsShift; 1161 1162 // Many multiple instructions (e.g. MLA) have three src operands. Encode 1163 // it as Rn (for multiply, that's in the same offset as RdLo. 1164 if (TID.getNumOperands() > OpIdx && 1165 !TID.OpInfo[OpIdx].isPredicate() && 1166 !TID.OpInfo[OpIdx].isOptionalDef()) 1167 Binary |= getMachineOpValue(MI, OpIdx) << ARMII::RegRdLoShift; 1168 1169 emitWordLE(Binary); 1170} 1171 1172void ARMCodeEmitter::emitExtendInstruction(const MachineInstr &MI) { 1173 const TargetInstrDesc &TID = MI.getDesc(); 1174 1175 // Part of binary is determined by TableGn. 1176 unsigned Binary = getBinaryCodeForInstr(MI); 1177 1178 // Set the conditional execution predicate 1179 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1180 1181 unsigned OpIdx = 0; 1182 1183 // Encode Rd 1184 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift; 1185 1186 const MachineOperand &MO1 = MI.getOperand(OpIdx++); 1187 const MachineOperand &MO2 = MI.getOperand(OpIdx); 1188 if (MO2.isReg()) { 1189 // Two register operand form. 1190 // Encode Rn. 1191 Binary |= getMachineOpValue(MI, MO1) << ARMII::RegRnShift; 1192 1193 // Encode Rm. 1194 Binary |= getMachineOpValue(MI, MO2); 1195 ++OpIdx; 1196 } else { 1197 Binary |= getMachineOpValue(MI, MO1); 1198 } 1199 1200 // Encode rot imm (0, 8, 16, or 24) if it has a rotate immediate operand. 1201 if (MI.getOperand(OpIdx).isImm() && 1202 !TID.OpInfo[OpIdx].isPredicate() && 1203 !TID.OpInfo[OpIdx].isOptionalDef()) 1204 Binary |= (getMachineOpValue(MI, OpIdx) / 8) << ARMII::ExtRotImmShift; 1205 1206 emitWordLE(Binary); 1207} 1208 1209void ARMCodeEmitter::emitMiscArithInstruction(const MachineInstr &MI) { 1210 const TargetInstrDesc &TID = MI.getDesc(); 1211 1212 // Part of binary is determined by TableGn. 1213 unsigned Binary = getBinaryCodeForInstr(MI); 1214 1215 // Set the conditional execution predicate 1216 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1217 1218 unsigned OpIdx = 0; 1219 1220 // Encode Rd 1221 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRdShift; 1222 1223 const MachineOperand &MO = MI.getOperand(OpIdx++); 1224 if (OpIdx == TID.getNumOperands() || 1225 TID.OpInfo[OpIdx].isPredicate() || 1226 TID.OpInfo[OpIdx].isOptionalDef()) { 1227 // Encode Rm and it's done. 1228 Binary |= getMachineOpValue(MI, MO); 1229 emitWordLE(Binary); 1230 return; 1231 } 1232 1233 // Encode Rn. 1234 Binary |= getMachineOpValue(MI, MO) << ARMII::RegRnShift; 1235 1236 // Encode Rm. 1237 Binary |= getMachineOpValue(MI, OpIdx++); 1238 1239 // Encode shift_imm. 1240 unsigned ShiftAmt = MI.getOperand(OpIdx).getImm(); 1241 if (TID.Opcode == ARM::PKHTB) { 1242 assert(ShiftAmt != 0 && "PKHTB shift_imm is 0!"); 1243 if (ShiftAmt == 32) 1244 ShiftAmt = 0; 1245 } 1246 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!"); 1247 Binary |= ShiftAmt << ARMII::ShiftShift; 1248 1249 emitWordLE(Binary); 1250} 1251 1252void ARMCodeEmitter::emitSaturateInstruction(const MachineInstr &MI) { 1253 const TargetInstrDesc &TID = MI.getDesc(); 1254 1255 // Part of binary is determined by TableGen. 1256 unsigned Binary = getBinaryCodeForInstr(MI); 1257 1258 // Set the conditional execution predicate 1259 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1260 1261 // Encode Rd 1262 Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift; 1263 1264 // Encode saturate bit position. 1265 unsigned Pos = MI.getOperand(1).getImm(); 1266 if (TID.Opcode == ARM::SSAT || TID.Opcode == ARM::SSAT16) 1267 Pos -= 1; 1268 assert((Pos < 16 || (Pos < 32 && 1269 TID.Opcode != ARM::SSAT16 && 1270 TID.Opcode != ARM::USAT16)) && 1271 "saturate bit position out of range"); 1272 Binary |= Pos << 16; 1273 1274 // Encode Rm 1275 Binary |= getMachineOpValue(MI, 2); 1276 1277 // Encode shift_imm. 1278 if (TID.getNumOperands() == 4) { 1279 unsigned ShiftOp = MI.getOperand(3).getImm(); 1280 ARM_AM::ShiftOpc Opc = ARM_AM::getSORegShOp(ShiftOp); 1281 if (Opc == ARM_AM::asr) 1282 Binary |= (1 << 6); 1283 unsigned ShiftAmt = MI.getOperand(3).getImm(); 1284 if (ShiftAmt == 32 && Opc == ARM_AM::asr) 1285 ShiftAmt = 0; 1286 assert(ShiftAmt < 32 && "shift_imm range is 0 to 31!"); 1287 Binary |= ShiftAmt << ARMII::ShiftShift; 1288 } 1289 1290 emitWordLE(Binary); 1291} 1292 1293void ARMCodeEmitter::emitBranchInstruction(const MachineInstr &MI) { 1294 const TargetInstrDesc &TID = MI.getDesc(); 1295 1296 if (TID.Opcode == ARM::TPsoft) { 1297 llvm_unreachable("ARM::TPsoft FIXME"); // FIXME 1298 } 1299 1300 // Part of binary is determined by TableGn. 1301 unsigned Binary = getBinaryCodeForInstr(MI); 1302 1303 // Set the conditional execution predicate 1304 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1305 1306 // Set signed_immed_24 field 1307 Binary |= getMachineOpValue(MI, 0); 1308 1309 emitWordLE(Binary); 1310} 1311 1312void ARMCodeEmitter::emitInlineJumpTable(unsigned JTIndex) { 1313 // Remember the base address of the inline jump table. 1314 uintptr_t JTBase = MCE.getCurrentPCValue(); 1315 JTI->addJumpTableBaseAddr(JTIndex, JTBase); 1316 DEBUG(errs() << " ** Jump Table #" << JTIndex << " @ " << (void*)JTBase 1317 << '\n'); 1318 1319 // Now emit the jump table entries. 1320 const std::vector<MachineBasicBlock*> &MBBs = (*MJTEs)[JTIndex].MBBs; 1321 for (unsigned i = 0, e = MBBs.size(); i != e; ++i) { 1322 if (IsPIC) 1323 // DestBB address - JT base. 1324 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_pic_jt, JTBase); 1325 else 1326 // Absolute DestBB address. 1327 emitMachineBasicBlock(MBBs[i], ARM::reloc_arm_absolute); 1328 emitWordLE(0); 1329 } 1330} 1331 1332void ARMCodeEmitter::emitMiscBranchInstruction(const MachineInstr &MI) { 1333 const TargetInstrDesc &TID = MI.getDesc(); 1334 1335 // Handle jump tables. 1336 if (TID.Opcode == ARM::BR_JTr || TID.Opcode == ARM::BR_JTadd) { 1337 // First emit a ldr pc, [] instruction. 1338 emitDataProcessingInstruction(MI, ARM::PC); 1339 1340 // Then emit the inline jump table. 1341 unsigned JTIndex = 1342 (TID.Opcode == ARM::BR_JTr) 1343 ? MI.getOperand(1).getIndex() : MI.getOperand(2).getIndex(); 1344 emitInlineJumpTable(JTIndex); 1345 return; 1346 } else if (TID.Opcode == ARM::BR_JTm) { 1347 // First emit a ldr pc, [] instruction. 1348 emitLoadStoreInstruction(MI, ARM::PC); 1349 1350 // Then emit the inline jump table. 1351 emitInlineJumpTable(MI.getOperand(3).getIndex()); 1352 return; 1353 } 1354 1355 // Part of binary is determined by TableGn. 1356 unsigned Binary = getBinaryCodeForInstr(MI); 1357 1358 // Set the conditional execution predicate 1359 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1360 1361 if (TID.Opcode == ARM::BX_RET || TID.Opcode == ARM::MOVPCLR) 1362 // The return register is LR. 1363 Binary |= getARMRegisterNumbering(ARM::LR); 1364 else 1365 // otherwise, set the return register 1366 Binary |= getMachineOpValue(MI, 0); 1367 1368 emitWordLE(Binary); 1369} 1370 1371static unsigned encodeVFPRd(const MachineInstr &MI, unsigned OpIdx) { 1372 unsigned RegD = MI.getOperand(OpIdx).getReg(); 1373 unsigned Binary = 0; 1374 bool isSPVFP = ARM::SPRRegisterClass->contains(RegD); 1375 RegD = getARMRegisterNumbering(RegD); 1376 if (!isSPVFP) 1377 Binary |= RegD << ARMII::RegRdShift; 1378 else { 1379 Binary |= ((RegD & 0x1E) >> 1) << ARMII::RegRdShift; 1380 Binary |= (RegD & 0x01) << ARMII::D_BitShift; 1381 } 1382 return Binary; 1383} 1384 1385static unsigned encodeVFPRn(const MachineInstr &MI, unsigned OpIdx) { 1386 unsigned RegN = MI.getOperand(OpIdx).getReg(); 1387 unsigned Binary = 0; 1388 bool isSPVFP = ARM::SPRRegisterClass->contains(RegN); 1389 RegN = getARMRegisterNumbering(RegN); 1390 if (!isSPVFP) 1391 Binary |= RegN << ARMII::RegRnShift; 1392 else { 1393 Binary |= ((RegN & 0x1E) >> 1) << ARMII::RegRnShift; 1394 Binary |= (RegN & 0x01) << ARMII::N_BitShift; 1395 } 1396 return Binary; 1397} 1398 1399static unsigned encodeVFPRm(const MachineInstr &MI, unsigned OpIdx) { 1400 unsigned RegM = MI.getOperand(OpIdx).getReg(); 1401 unsigned Binary = 0; 1402 bool isSPVFP = ARM::SPRRegisterClass->contains(RegM); 1403 RegM = getARMRegisterNumbering(RegM); 1404 if (!isSPVFP) 1405 Binary |= RegM; 1406 else { 1407 Binary |= ((RegM & 0x1E) >> 1); 1408 Binary |= (RegM & 0x01) << ARMII::M_BitShift; 1409 } 1410 return Binary; 1411} 1412 1413void ARMCodeEmitter::emitVFPArithInstruction(const MachineInstr &MI) { 1414 const TargetInstrDesc &TID = MI.getDesc(); 1415 1416 // Part of binary is determined by TableGn. 1417 unsigned Binary = getBinaryCodeForInstr(MI); 1418 1419 // Set the conditional execution predicate 1420 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1421 1422 unsigned OpIdx = 0; 1423 assert((Binary & ARMII::D_BitShift) == 0 && 1424 (Binary & ARMII::N_BitShift) == 0 && 1425 (Binary & ARMII::M_BitShift) == 0 && "VFP encoding bug!"); 1426 1427 // Encode Dd / Sd. 1428 Binary |= encodeVFPRd(MI, OpIdx++); 1429 1430 // If this is a two-address operand, skip it, e.g. FMACD. 1431 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) 1432 ++OpIdx; 1433 1434 // Encode Dn / Sn. 1435 if ((TID.TSFlags & ARMII::FormMask) == ARMII::VFPBinaryFrm) 1436 Binary |= encodeVFPRn(MI, OpIdx++); 1437 1438 if (OpIdx == TID.getNumOperands() || 1439 TID.OpInfo[OpIdx].isPredicate() || 1440 TID.OpInfo[OpIdx].isOptionalDef()) { 1441 // FCMPEZD etc. has only one operand. 1442 emitWordLE(Binary); 1443 return; 1444 } 1445 1446 // Encode Dm / Sm. 1447 Binary |= encodeVFPRm(MI, OpIdx); 1448 1449 emitWordLE(Binary); 1450} 1451 1452void ARMCodeEmitter::emitVFPConversionInstruction(const MachineInstr &MI) { 1453 const TargetInstrDesc &TID = MI.getDesc(); 1454 unsigned Form = TID.TSFlags & ARMII::FormMask; 1455 1456 // Part of binary is determined by TableGn. 1457 unsigned Binary = getBinaryCodeForInstr(MI); 1458 1459 // Set the conditional execution predicate 1460 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1461 1462 switch (Form) { 1463 default: break; 1464 case ARMII::VFPConv1Frm: 1465 case ARMII::VFPConv2Frm: 1466 case ARMII::VFPConv3Frm: 1467 // Encode Dd / Sd. 1468 Binary |= encodeVFPRd(MI, 0); 1469 break; 1470 case ARMII::VFPConv4Frm: 1471 // Encode Dn / Sn. 1472 Binary |= encodeVFPRn(MI, 0); 1473 break; 1474 case ARMII::VFPConv5Frm: 1475 // Encode Dm / Sm. 1476 Binary |= encodeVFPRm(MI, 0); 1477 break; 1478 } 1479 1480 switch (Form) { 1481 default: break; 1482 case ARMII::VFPConv1Frm: 1483 // Encode Dm / Sm. 1484 Binary |= encodeVFPRm(MI, 1); 1485 break; 1486 case ARMII::VFPConv2Frm: 1487 case ARMII::VFPConv3Frm: 1488 // Encode Dn / Sn. 1489 Binary |= encodeVFPRn(MI, 1); 1490 break; 1491 case ARMII::VFPConv4Frm: 1492 case ARMII::VFPConv5Frm: 1493 // Encode Dd / Sd. 1494 Binary |= encodeVFPRd(MI, 1); 1495 break; 1496 } 1497 1498 if (Form == ARMII::VFPConv5Frm) 1499 // Encode Dn / Sn. 1500 Binary |= encodeVFPRn(MI, 2); 1501 else if (Form == ARMII::VFPConv3Frm) 1502 // Encode Dm / Sm. 1503 Binary |= encodeVFPRm(MI, 2); 1504 1505 emitWordLE(Binary); 1506} 1507 1508void ARMCodeEmitter::emitVFPLoadStoreInstruction(const MachineInstr &MI) { 1509 // Part of binary is determined by TableGn. 1510 unsigned Binary = getBinaryCodeForInstr(MI); 1511 1512 // Set the conditional execution predicate 1513 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1514 1515 unsigned OpIdx = 0; 1516 1517 // Encode Dd / Sd. 1518 Binary |= encodeVFPRd(MI, OpIdx++); 1519 1520 // Encode address base. 1521 const MachineOperand &Base = MI.getOperand(OpIdx++); 1522 Binary |= getMachineOpValue(MI, Base) << ARMII::RegRnShift; 1523 1524 // If there is a non-zero immediate offset, encode it. 1525 if (Base.isReg()) { 1526 const MachineOperand &Offset = MI.getOperand(OpIdx); 1527 if (unsigned ImmOffs = ARM_AM::getAM5Offset(Offset.getImm())) { 1528 if (ARM_AM::getAM5Op(Offset.getImm()) == ARM_AM::add) 1529 Binary |= 1 << ARMII::U_BitShift; 1530 Binary |= ImmOffs; 1531 emitWordLE(Binary); 1532 return; 1533 } 1534 } 1535 1536 // If immediate offset is omitted, default to +0. 1537 Binary |= 1 << ARMII::U_BitShift; 1538 1539 emitWordLE(Binary); 1540} 1541 1542void 1543ARMCodeEmitter::emitVFPLoadStoreMultipleInstruction(const MachineInstr &MI) { 1544 const TargetInstrDesc &TID = MI.getDesc(); 1545 bool IsUpdating = (TID.TSFlags & ARMII::IndexModeMask) != 0; 1546 1547 // Part of binary is determined by TableGn. 1548 unsigned Binary = getBinaryCodeForInstr(MI); 1549 1550 // Set the conditional execution predicate 1551 Binary |= II->getPredicate(&MI) << ARMII::CondShift; 1552 1553 // Skip operand 0 of an instruction with base register update. 1554 unsigned OpIdx = 0; 1555 if (IsUpdating) 1556 ++OpIdx; 1557 1558 // Set base address operand 1559 Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift; 1560 1561 // Set addressing mode by modifying bits U(23) and P(24) 1562 const MachineOperand &MO = MI.getOperand(OpIdx++); 1563 Binary |= getAddrModeUPBits(ARM_AM::getAM4SubMode(MO.getImm())); 1564 1565 // Set bit W(21) 1566 if (IsUpdating) 1567 Binary |= 0x1 << ARMII::W_BitShift; 1568 1569 // First register is encoded in Dd. 1570 Binary |= encodeVFPRd(MI, OpIdx+2); 1571 1572 // Count the number of registers. 1573 unsigned NumRegs = 1; 1574 for (unsigned i = OpIdx+3, e = MI.getNumOperands(); i != e; ++i) { 1575 const MachineOperand &MO = MI.getOperand(i); 1576 if (!MO.isReg() || MO.isImplicit()) 1577 break; 1578 ++NumRegs; 1579 } 1580 // Bit 8 will be set if <list> is consecutive 64-bit registers (e.g., D0) 1581 // Otherwise, it will be 0, in the case of 32-bit registers. 1582 if(Binary & 0x100) 1583 Binary |= NumRegs * 2; 1584 else 1585 Binary |= NumRegs; 1586 1587 emitWordLE(Binary); 1588} 1589 1590static unsigned encodeNEONRd(const MachineInstr &MI, unsigned OpIdx) { 1591 unsigned RegD = MI.getOperand(OpIdx).getReg(); 1592 unsigned Binary = 0; 1593 RegD = getARMRegisterNumbering(RegD); 1594 Binary |= (RegD & 0xf) << ARMII::RegRdShift; 1595 Binary |= ((RegD >> 4) & 1) << ARMII::D_BitShift; 1596 return Binary; 1597} 1598 1599static unsigned encodeNEONRn(const MachineInstr &MI, unsigned OpIdx) { 1600 unsigned RegN = MI.getOperand(OpIdx).getReg(); 1601 unsigned Binary = 0; 1602 RegN = getARMRegisterNumbering(RegN); 1603 Binary |= (RegN & 0xf) << ARMII::RegRnShift; 1604 Binary |= ((RegN >> 4) & 1) << ARMII::N_BitShift; 1605 return Binary; 1606} 1607 1608static unsigned encodeNEONRm(const MachineInstr &MI, unsigned OpIdx) { 1609 unsigned RegM = MI.getOperand(OpIdx).getReg(); 1610 unsigned Binary = 0; 1611 RegM = getARMRegisterNumbering(RegM); 1612 Binary |= (RegM & 0xf); 1613 Binary |= ((RegM >> 4) & 1) << ARMII::M_BitShift; 1614 return Binary; 1615} 1616 1617/// convertNEONDataProcToThumb - Convert the ARM mode encoding for a NEON 1618/// data-processing instruction to the corresponding Thumb encoding. 1619static unsigned convertNEONDataProcToThumb(unsigned Binary) { 1620 assert((Binary & 0xfe000000) == 0xf2000000 && 1621 "not an ARM NEON data-processing instruction"); 1622 unsigned UBit = (Binary >> 24) & 1; 1623 return 0xef000000 | (UBit << 28) | (Binary & 0xffffff); 1624} 1625 1626void ARMCodeEmitter::emitNEONLaneInstruction(const MachineInstr &MI) { 1627 unsigned Binary = getBinaryCodeForInstr(MI); 1628 1629 unsigned RegTOpIdx, RegNOpIdx, LnOpIdx; 1630 const TargetInstrDesc &TID = MI.getDesc(); 1631 if ((TID.TSFlags & ARMII::FormMask) == ARMII::NGetLnFrm) { 1632 RegTOpIdx = 0; 1633 RegNOpIdx = 1; 1634 LnOpIdx = 2; 1635 } else { // ARMII::NSetLnFrm 1636 RegTOpIdx = 2; 1637 RegNOpIdx = 0; 1638 LnOpIdx = 3; 1639 } 1640 1641 // Set the conditional execution predicate 1642 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift; 1643 1644 unsigned RegT = MI.getOperand(RegTOpIdx).getReg(); 1645 RegT = getARMRegisterNumbering(RegT); 1646 Binary |= (RegT << ARMII::RegRdShift); 1647 Binary |= encodeNEONRn(MI, RegNOpIdx); 1648 1649 unsigned LaneShift; 1650 if ((Binary & (1 << 22)) != 0) 1651 LaneShift = 0; // 8-bit elements 1652 else if ((Binary & (1 << 5)) != 0) 1653 LaneShift = 1; // 16-bit elements 1654 else 1655 LaneShift = 2; // 32-bit elements 1656 1657 unsigned Lane = MI.getOperand(LnOpIdx).getImm() << LaneShift; 1658 unsigned Opc1 = Lane >> 2; 1659 unsigned Opc2 = Lane & 3; 1660 assert((Opc1 & 3) == 0 && "out-of-range lane number operand"); 1661 Binary |= (Opc1 << 21); 1662 Binary |= (Opc2 << 5); 1663 1664 emitWordLE(Binary); 1665} 1666 1667void ARMCodeEmitter::emitNEONDupInstruction(const MachineInstr &MI) { 1668 unsigned Binary = getBinaryCodeForInstr(MI); 1669 1670 // Set the conditional execution predicate 1671 Binary |= (IsThumb ? ARMCC::AL : II->getPredicate(&MI)) << ARMII::CondShift; 1672 1673 unsigned RegT = MI.getOperand(1).getReg(); 1674 RegT = getARMRegisterNumbering(RegT); 1675 Binary |= (RegT << ARMII::RegRdShift); 1676 Binary |= encodeNEONRn(MI, 0); 1677 emitWordLE(Binary); 1678} 1679 1680void ARMCodeEmitter::emitNEON1RegModImmInstruction(const MachineInstr &MI) { 1681 unsigned Binary = getBinaryCodeForInstr(MI); 1682 // Destination register is encoded in Dd. 1683 Binary |= encodeNEONRd(MI, 0); 1684 // Immediate fields: Op, Cmode, I, Imm3, Imm4 1685 unsigned Imm = MI.getOperand(1).getImm(); 1686 unsigned Op = (Imm >> 12) & 1; 1687 unsigned Cmode = (Imm >> 8) & 0xf; 1688 unsigned I = (Imm >> 7) & 1; 1689 unsigned Imm3 = (Imm >> 4) & 0x7; 1690 unsigned Imm4 = Imm & 0xf; 1691 Binary |= (I << 24) | (Imm3 << 16) | (Cmode << 8) | (Op << 5) | Imm4; 1692 if (IsThumb) 1693 Binary = convertNEONDataProcToThumb(Binary); 1694 emitWordLE(Binary); 1695} 1696 1697void ARMCodeEmitter::emitNEON2RegInstruction(const MachineInstr &MI) { 1698 const TargetInstrDesc &TID = MI.getDesc(); 1699 unsigned Binary = getBinaryCodeForInstr(MI); 1700 // Destination register is encoded in Dd; source register in Dm. 1701 unsigned OpIdx = 0; 1702 Binary |= encodeNEONRd(MI, OpIdx++); 1703 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) 1704 ++OpIdx; 1705 Binary |= encodeNEONRm(MI, OpIdx); 1706 if (IsThumb) 1707 Binary = convertNEONDataProcToThumb(Binary); 1708 // FIXME: This does not handle VDUPfdf or VDUPfqf. 1709 emitWordLE(Binary); 1710} 1711 1712void ARMCodeEmitter::emitNEON3RegInstruction(const MachineInstr &MI) { 1713 const TargetInstrDesc &TID = MI.getDesc(); 1714 unsigned Binary = getBinaryCodeForInstr(MI); 1715 // Destination register is encoded in Dd; source registers in Dn and Dm. 1716 unsigned OpIdx = 0; 1717 Binary |= encodeNEONRd(MI, OpIdx++); 1718 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) 1719 ++OpIdx; 1720 Binary |= encodeNEONRn(MI, OpIdx++); 1721 if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) 1722 ++OpIdx; 1723 Binary |= encodeNEONRm(MI, OpIdx); 1724 if (IsThumb) 1725 Binary = convertNEONDataProcToThumb(Binary); 1726 // FIXME: This does not handle VMOVDneon or VMOVQ. 1727 emitWordLE(Binary); 1728} 1729 1730#include "ARMGenCodeEmitter.inc" 1731