| //===- MipsDisassembler.cpp - Disassembler for Mips -------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file is part of the Mips Disassembler. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "Mips.h" |
| #include "MipsRegisterInfo.h" |
| #include "MipsSubtarget.h" |
| #include "llvm/MC/MCContext.h" |
| #include "llvm/MC/MCDisassembler.h" |
| #include "llvm/MC/MCFixedLenDisassembler.h" |
| #include "llvm/MC/MCInst.h" |
| #include "llvm/MC/MCSubtargetInfo.h" |
| #include "llvm/Support/MathExtras.h" |
| #include "llvm/Support/MemoryObject.h" |
| #include "llvm/Support/TargetRegistry.h" |
| |
| using namespace llvm; |
| |
| #define DEBUG_TYPE "mips-disassembler" |
| |
| typedef MCDisassembler::DecodeStatus DecodeStatus; |
| |
| namespace { |
| |
| /// MipsDisassemblerBase - a disasembler class for Mips. |
| class MipsDisassemblerBase : public MCDisassembler { |
| public: |
| /// Constructor - Initializes the disassembler. |
| /// |
| MipsDisassemblerBase(const MCSubtargetInfo &STI, MCContext &Ctx, |
| bool bigEndian) : |
| MCDisassembler(STI, Ctx), |
| IsN64(STI.getFeatureBits() & Mips::FeatureN64), isBigEndian(bigEndian) {} |
| |
| virtual ~MipsDisassemblerBase() {} |
| |
| bool isN64() const { return IsN64; } |
| |
| private: |
| bool IsN64; |
| protected: |
| bool isBigEndian; |
| }; |
| |
| /// MipsDisassembler - a disasembler class for Mips32. |
| class MipsDisassembler : public MipsDisassemblerBase { |
| bool IsMicroMips; |
| public: |
| /// Constructor - Initializes the disassembler. |
| /// |
| MipsDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx, |
| bool bigEndian) : |
| MipsDisassemblerBase(STI, Ctx, bigEndian) { |
| IsMicroMips = STI.getFeatureBits() & Mips::FeatureMicroMips; |
| } |
| |
| /// getInstruction - See MCDisassembler. |
| virtual DecodeStatus getInstruction(MCInst &instr, |
| uint64_t &size, |
| const MemoryObject ®ion, |
| uint64_t address, |
| raw_ostream &vStream, |
| raw_ostream &cStream) const; |
| }; |
| |
| |
| /// Mips64Disassembler - a disasembler class for Mips64. |
| class Mips64Disassembler : public MipsDisassemblerBase { |
| public: |
| /// Constructor - Initializes the disassembler. |
| /// |
| Mips64Disassembler(const MCSubtargetInfo &STI, MCContext &Ctx, |
| bool bigEndian) : |
| MipsDisassemblerBase(STI, Ctx, bigEndian) {} |
| |
| /// getInstruction - See MCDisassembler. |
| virtual DecodeStatus getInstruction(MCInst &instr, |
| uint64_t &size, |
| const MemoryObject ®ion, |
| uint64_t address, |
| raw_ostream &vStream, |
| raw_ostream &cStream) const; |
| }; |
| |
| } // end anonymous namespace |
| |
| // Forward declare these because the autogenerated code will reference them. |
| // Definitions are further down. |
| static DecodeStatus DecodeGPR64RegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeCPU16RegsRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodePtrRegisterClass(MCInst &Inst, |
| unsigned Insn, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeDSPRRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeFGR64RegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeFGR32RegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeFGRH32RegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeCCRRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeFCCRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeHWRegsRegisterClass(MCInst &Inst, |
| unsigned Insn, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeAFGR64RegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeACC64DSPRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeHI32DSPRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeLO32DSPRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeMSA128BRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeMSA128HRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeMSA128WRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeMSA128DRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeMSACtrlRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeBranchTarget(MCInst &Inst, |
| unsigned Offset, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeJumpTarget(MCInst &Inst, |
| unsigned Insn, |
| uint64_t Address, |
| const void *Decoder); |
| |
| // DecodeBranchTargetMM - Decode microMIPS branch offset, which is |
| // shifted left by 1 bit. |
| static DecodeStatus DecodeBranchTargetMM(MCInst &Inst, |
| unsigned Offset, |
| uint64_t Address, |
| const void *Decoder); |
| |
| // DecodeJumpTargetMM - Decode microMIPS jump target, which is |
| // shifted left by 1 bit. |
| static DecodeStatus DecodeJumpTargetMM(MCInst &Inst, |
| unsigned Insn, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeMem(MCInst &Inst, |
| unsigned Insn, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeMSA128Mem(MCInst &Inst, unsigned Insn, |
| uint64_t Address, const void *Decoder); |
| |
| static DecodeStatus DecodeMemMMImm12(MCInst &Inst, |
| unsigned Insn, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeMemMMImm16(MCInst &Inst, |
| unsigned Insn, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeFMem(MCInst &Inst, unsigned Insn, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeSimm16(MCInst &Inst, |
| unsigned Insn, |
| uint64_t Address, |
| const void *Decoder); |
| |
| // Decode the immediate field of an LSA instruction which |
| // is off by one. |
| static DecodeStatus DecodeLSAImm(MCInst &Inst, |
| unsigned Insn, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeInsSize(MCInst &Inst, |
| unsigned Insn, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus DecodeExtSize(MCInst &Inst, |
| unsigned Insn, |
| uint64_t Address, |
| const void *Decoder); |
| |
| /// INSVE_[BHWD] have an implicit operand that the generated decoder doesn't |
| /// handle. |
| template <typename InsnType> |
| static DecodeStatus DecodeINSVE_DF(MCInst &MI, InsnType insn, uint64_t Address, |
| const void *Decoder); |
| namespace llvm { |
| extern Target TheMipselTarget, TheMipsTarget, TheMips64Target, |
| TheMips64elTarget; |
| } |
| |
| static MCDisassembler *createMipsDisassembler( |
| const Target &T, |
| const MCSubtargetInfo &STI, |
| MCContext &Ctx) { |
| return new MipsDisassembler(STI, Ctx, true); |
| } |
| |
| static MCDisassembler *createMipselDisassembler( |
| const Target &T, |
| const MCSubtargetInfo &STI, |
| MCContext &Ctx) { |
| return new MipsDisassembler(STI, Ctx, false); |
| } |
| |
| static MCDisassembler *createMips64Disassembler( |
| const Target &T, |
| const MCSubtargetInfo &STI, |
| MCContext &Ctx) { |
| return new Mips64Disassembler(STI, Ctx, true); |
| } |
| |
| static MCDisassembler *createMips64elDisassembler( |
| const Target &T, |
| const MCSubtargetInfo &STI, |
| MCContext &Ctx) { |
| return new Mips64Disassembler(STI, Ctx, false); |
| } |
| |
| extern "C" void LLVMInitializeMipsDisassembler() { |
| // Register the disassembler. |
| TargetRegistry::RegisterMCDisassembler(TheMipsTarget, |
| createMipsDisassembler); |
| TargetRegistry::RegisterMCDisassembler(TheMipselTarget, |
| createMipselDisassembler); |
| TargetRegistry::RegisterMCDisassembler(TheMips64Target, |
| createMips64Disassembler); |
| TargetRegistry::RegisterMCDisassembler(TheMips64elTarget, |
| createMips64elDisassembler); |
| } |
| |
| #include "MipsGenDisassemblerTables.inc" |
| |
| template <typename InsnType> |
| static DecodeStatus DecodeINSVE_DF(MCInst &MI, InsnType insn, uint64_t Address, |
| const void *Decoder) { |
| typedef DecodeStatus (*DecodeFN)(MCInst &, unsigned, uint64_t, const void *); |
| // The size of the n field depends on the element size |
| // The register class also depends on this. |
| InsnType tmp = fieldFromInstruction(insn, 17, 5); |
| unsigned NSize = 0; |
| DecodeFN RegDecoder = nullptr; |
| if ((tmp & 0x18) == 0x00) { // INSVE_B |
| NSize = 4; |
| RegDecoder = DecodeMSA128BRegisterClass; |
| } else if ((tmp & 0x1c) == 0x10) { // INSVE_H |
| NSize = 3; |
| RegDecoder = DecodeMSA128HRegisterClass; |
| } else if ((tmp & 0x1e) == 0x18) { // INSVE_W |
| NSize = 2; |
| RegDecoder = DecodeMSA128WRegisterClass; |
| } else if ((tmp & 0x1f) == 0x1c) { // INSVE_D |
| NSize = 1; |
| RegDecoder = DecodeMSA128DRegisterClass; |
| } else |
| llvm_unreachable("Invalid encoding"); |
| |
| assert(NSize != 0 && RegDecoder != nullptr); |
| |
| // $wd |
| tmp = fieldFromInstruction(insn, 6, 5); |
| if (RegDecoder(MI, tmp, Address, Decoder) == MCDisassembler::Fail) |
| return MCDisassembler::Fail; |
| // $wd_in |
| if (RegDecoder(MI, tmp, Address, Decoder) == MCDisassembler::Fail) |
| return MCDisassembler::Fail; |
| // $n |
| tmp = fieldFromInstruction(insn, 16, NSize); |
| MI.addOperand(MCOperand::CreateImm(tmp)); |
| // $ws |
| tmp = fieldFromInstruction(insn, 11, 5); |
| if (RegDecoder(MI, tmp, Address, Decoder) == MCDisassembler::Fail) |
| return MCDisassembler::Fail; |
| // $n2 |
| MI.addOperand(MCOperand::CreateImm(0)); |
| |
| return MCDisassembler::Success; |
| } |
| |
| /// readInstruction - read four bytes from the MemoryObject |
| /// and return 32 bit word sorted according to the given endianess |
| static DecodeStatus readInstruction32(const MemoryObject ®ion, |
| uint64_t address, |
| uint64_t &size, |
| uint32_t &insn, |
| bool isBigEndian, |
| bool IsMicroMips) { |
| uint8_t Bytes[4]; |
| |
| // We want to read exactly 4 Bytes of data. |
| if (region.readBytes(address, 4, Bytes) == -1) { |
| size = 0; |
| return MCDisassembler::Fail; |
| } |
| |
| if (isBigEndian) { |
| // Encoded as a big-endian 32-bit word in the stream. |
| insn = (Bytes[3] << 0) | |
| (Bytes[2] << 8) | |
| (Bytes[1] << 16) | |
| (Bytes[0] << 24); |
| } |
| else { |
| // Encoded as a small-endian 32-bit word in the stream. |
| // Little-endian byte ordering: |
| // mips32r2: 4 | 3 | 2 | 1 |
| // microMIPS: 2 | 1 | 4 | 3 |
| if (IsMicroMips) { |
| insn = (Bytes[2] << 0) | |
| (Bytes[3] << 8) | |
| (Bytes[0] << 16) | |
| (Bytes[1] << 24); |
| } else { |
| insn = (Bytes[0] << 0) | |
| (Bytes[1] << 8) | |
| (Bytes[2] << 16) | |
| (Bytes[3] << 24); |
| } |
| } |
| |
| return MCDisassembler::Success; |
| } |
| |
| DecodeStatus |
| MipsDisassembler::getInstruction(MCInst &instr, |
| uint64_t &Size, |
| const MemoryObject &Region, |
| uint64_t Address, |
| raw_ostream &vStream, |
| raw_ostream &cStream) const { |
| uint32_t Insn; |
| |
| DecodeStatus Result = readInstruction32(Region, Address, Size, |
| Insn, isBigEndian, IsMicroMips); |
| if (Result == MCDisassembler::Fail) |
| return MCDisassembler::Fail; |
| |
| if (IsMicroMips) { |
| // Calling the auto-generated decoder function. |
| Result = decodeInstruction(DecoderTableMicroMips32, instr, Insn, Address, |
| this, STI); |
| if (Result != MCDisassembler::Fail) { |
| Size = 4; |
| return Result; |
| } |
| return MCDisassembler::Fail; |
| } |
| |
| // Calling the auto-generated decoder function. |
| Result = decodeInstruction(DecoderTableMips32, instr, Insn, Address, |
| this, STI); |
| if (Result != MCDisassembler::Fail) { |
| Size = 4; |
| return Result; |
| } |
| |
| return MCDisassembler::Fail; |
| } |
| |
| DecodeStatus |
| Mips64Disassembler::getInstruction(MCInst &instr, |
| uint64_t &Size, |
| const MemoryObject &Region, |
| uint64_t Address, |
| raw_ostream &vStream, |
| raw_ostream &cStream) const { |
| uint32_t Insn; |
| |
| DecodeStatus Result = readInstruction32(Region, Address, Size, |
| Insn, isBigEndian, false); |
| if (Result == MCDisassembler::Fail) |
| return MCDisassembler::Fail; |
| |
| // Calling the auto-generated decoder function. |
| Result = decodeInstruction(DecoderTableMips6432, instr, Insn, Address, |
| this, STI); |
| if (Result != MCDisassembler::Fail) { |
| Size = 4; |
| return Result; |
| } |
| // If we fail to decode in Mips64 decoder space we can try in Mips32 |
| Result = decodeInstruction(DecoderTableMips32, instr, Insn, Address, |
| this, STI); |
| if (Result != MCDisassembler::Fail) { |
| Size = 4; |
| return Result; |
| } |
| |
| return MCDisassembler::Fail; |
| } |
| |
| static unsigned getReg(const void *D, unsigned RC, unsigned RegNo) { |
| const MipsDisassemblerBase *Dis = static_cast<const MipsDisassemblerBase*>(D); |
| const MCRegisterInfo *RegInfo = Dis->getContext().getRegisterInfo(); |
| return *(RegInfo->getRegClass(RC).begin() + RegNo); |
| } |
| |
| static DecodeStatus DecodeCPU16RegsRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| |
| return MCDisassembler::Fail; |
| |
| } |
| |
| static DecodeStatus DecodeGPR64RegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| |
| if (RegNo > 31) |
| return MCDisassembler::Fail; |
| |
| unsigned Reg = getReg(Decoder, Mips::GPR64RegClassID, RegNo); |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| if (RegNo > 31) |
| return MCDisassembler::Fail; |
| unsigned Reg = getReg(Decoder, Mips::GPR32RegClassID, RegNo); |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodePtrRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| if (static_cast<const MipsDisassembler *>(Decoder)->isN64()) |
| return DecodeGPR64RegisterClass(Inst, RegNo, Address, Decoder); |
| |
| return DecodeGPR32RegisterClass(Inst, RegNo, Address, Decoder); |
| } |
| |
| static DecodeStatus DecodeDSPRRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| return DecodeGPR32RegisterClass(Inst, RegNo, Address, Decoder); |
| } |
| |
| static DecodeStatus DecodeFGR64RegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| if (RegNo > 31) |
| return MCDisassembler::Fail; |
| |
| unsigned Reg = getReg(Decoder, Mips::FGR64RegClassID, RegNo); |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeFGR32RegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| if (RegNo > 31) |
| return MCDisassembler::Fail; |
| |
| unsigned Reg = getReg(Decoder, Mips::FGR32RegClassID, RegNo); |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeFGRH32RegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| if (RegNo > 31) |
| return MCDisassembler::Fail; |
| |
| unsigned Reg = getReg(Decoder, Mips::FGRH32RegClassID, RegNo); |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeCCRRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| if (RegNo > 31) |
| return MCDisassembler::Fail; |
| unsigned Reg = getReg(Decoder, Mips::CCRRegClassID, RegNo); |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeFCCRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| if (RegNo > 7) |
| return MCDisassembler::Fail; |
| unsigned Reg = getReg(Decoder, Mips::FCCRegClassID, RegNo); |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeMem(MCInst &Inst, |
| unsigned Insn, |
| uint64_t Address, |
| const void *Decoder) { |
| int Offset = SignExtend32<16>(Insn & 0xffff); |
| unsigned Reg = fieldFromInstruction(Insn, 16, 5); |
| unsigned Base = fieldFromInstruction(Insn, 21, 5); |
| |
| Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg); |
| Base = getReg(Decoder, Mips::GPR32RegClassID, Base); |
| |
| if(Inst.getOpcode() == Mips::SC){ |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| } |
| |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| Inst.addOperand(MCOperand::CreateReg(Base)); |
| Inst.addOperand(MCOperand::CreateImm(Offset)); |
| |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeMSA128Mem(MCInst &Inst, unsigned Insn, |
| uint64_t Address, const void *Decoder) { |
| int Offset = SignExtend32<10>(fieldFromInstruction(Insn, 16, 10)); |
| unsigned Reg = fieldFromInstruction(Insn, 6, 5); |
| unsigned Base = fieldFromInstruction(Insn, 11, 5); |
| |
| Reg = getReg(Decoder, Mips::MSA128BRegClassID, Reg); |
| Base = getReg(Decoder, Mips::GPR32RegClassID, Base); |
| |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| Inst.addOperand(MCOperand::CreateReg(Base)); |
| |
| // The immediate field of an LD/ST instruction is scaled which means it must |
| // be multiplied (when decoding) by the size (in bytes) of the instructions' |
| // data format. |
| // .b - 1 byte |
| // .h - 2 bytes |
| // .w - 4 bytes |
| // .d - 8 bytes |
| switch(Inst.getOpcode()) |
| { |
| default: |
| assert (0 && "Unexpected instruction"); |
| return MCDisassembler::Fail; |
| break; |
| case Mips::LD_B: |
| case Mips::ST_B: |
| Inst.addOperand(MCOperand::CreateImm(Offset)); |
| break; |
| case Mips::LD_H: |
| case Mips::ST_H: |
| Inst.addOperand(MCOperand::CreateImm(Offset << 1)); |
| break; |
| case Mips::LD_W: |
| case Mips::ST_W: |
| Inst.addOperand(MCOperand::CreateImm(Offset << 2)); |
| break; |
| case Mips::LD_D: |
| case Mips::ST_D: |
| Inst.addOperand(MCOperand::CreateImm(Offset << 3)); |
| break; |
| } |
| |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeMemMMImm12(MCInst &Inst, |
| unsigned Insn, |
| uint64_t Address, |
| const void *Decoder) { |
| int Offset = SignExtend32<12>(Insn & 0x0fff); |
| unsigned Reg = fieldFromInstruction(Insn, 21, 5); |
| unsigned Base = fieldFromInstruction(Insn, 16, 5); |
| |
| Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg); |
| Base = getReg(Decoder, Mips::GPR32RegClassID, Base); |
| |
| if (Inst.getOpcode() == Mips::SC_MM) |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| Inst.addOperand(MCOperand::CreateReg(Base)); |
| Inst.addOperand(MCOperand::CreateImm(Offset)); |
| |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeMemMMImm16(MCInst &Inst, |
| unsigned Insn, |
| uint64_t Address, |
| const void *Decoder) { |
| int Offset = SignExtend32<16>(Insn & 0xffff); |
| unsigned Reg = fieldFromInstruction(Insn, 21, 5); |
| unsigned Base = fieldFromInstruction(Insn, 16, 5); |
| |
| Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg); |
| Base = getReg(Decoder, Mips::GPR32RegClassID, Base); |
| |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| Inst.addOperand(MCOperand::CreateReg(Base)); |
| Inst.addOperand(MCOperand::CreateImm(Offset)); |
| |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeFMem(MCInst &Inst, |
| unsigned Insn, |
| uint64_t Address, |
| const void *Decoder) { |
| int Offset = SignExtend32<16>(Insn & 0xffff); |
| unsigned Reg = fieldFromInstruction(Insn, 16, 5); |
| unsigned Base = fieldFromInstruction(Insn, 21, 5); |
| |
| Reg = getReg(Decoder, Mips::FGR64RegClassID, Reg); |
| Base = getReg(Decoder, Mips::GPR32RegClassID, Base); |
| |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| Inst.addOperand(MCOperand::CreateReg(Base)); |
| Inst.addOperand(MCOperand::CreateImm(Offset)); |
| |
| return MCDisassembler::Success; |
| } |
| |
| |
| static DecodeStatus DecodeHWRegsRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| // Currently only hardware register 29 is supported. |
| if (RegNo != 29) |
| return MCDisassembler::Fail; |
| Inst.addOperand(MCOperand::CreateReg(Mips::HWR29)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeAFGR64RegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| if (RegNo > 30 || RegNo %2) |
| return MCDisassembler::Fail; |
| |
| ; |
| unsigned Reg = getReg(Decoder, Mips::AFGR64RegClassID, RegNo /2); |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeACC64DSPRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| if (RegNo >= 4) |
| return MCDisassembler::Fail; |
| |
| unsigned Reg = getReg(Decoder, Mips::ACC64DSPRegClassID, RegNo); |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeHI32DSPRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| if (RegNo >= 4) |
| return MCDisassembler::Fail; |
| |
| unsigned Reg = getReg(Decoder, Mips::HI32DSPRegClassID, RegNo); |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeLO32DSPRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| if (RegNo >= 4) |
| return MCDisassembler::Fail; |
| |
| unsigned Reg = getReg(Decoder, Mips::LO32DSPRegClassID, RegNo); |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeMSA128BRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| if (RegNo > 31) |
| return MCDisassembler::Fail; |
| |
| unsigned Reg = getReg(Decoder, Mips::MSA128BRegClassID, RegNo); |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeMSA128HRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| if (RegNo > 31) |
| return MCDisassembler::Fail; |
| |
| unsigned Reg = getReg(Decoder, Mips::MSA128HRegClassID, RegNo); |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeMSA128WRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| if (RegNo > 31) |
| return MCDisassembler::Fail; |
| |
| unsigned Reg = getReg(Decoder, Mips::MSA128WRegClassID, RegNo); |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeMSA128DRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| if (RegNo > 31) |
| return MCDisassembler::Fail; |
| |
| unsigned Reg = getReg(Decoder, Mips::MSA128DRegClassID, RegNo); |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeMSACtrlRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| if (RegNo > 7) |
| return MCDisassembler::Fail; |
| |
| unsigned Reg = getReg(Decoder, Mips::MSACtrlRegClassID, RegNo); |
| Inst.addOperand(MCOperand::CreateReg(Reg)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeBranchTarget(MCInst &Inst, |
| unsigned Offset, |
| uint64_t Address, |
| const void *Decoder) { |
| unsigned BranchOffset = Offset & 0xffff; |
| BranchOffset = SignExtend32<18>(BranchOffset << 2) + 4; |
| Inst.addOperand(MCOperand::CreateImm(BranchOffset)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeJumpTarget(MCInst &Inst, |
| unsigned Insn, |
| uint64_t Address, |
| const void *Decoder) { |
| |
| unsigned JumpOffset = fieldFromInstruction(Insn, 0, 26) << 2; |
| Inst.addOperand(MCOperand::CreateImm(JumpOffset)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeBranchTargetMM(MCInst &Inst, |
| unsigned Offset, |
| uint64_t Address, |
| const void *Decoder) { |
| unsigned BranchOffset = Offset & 0xffff; |
| BranchOffset = SignExtend32<18>(BranchOffset << 1); |
| Inst.addOperand(MCOperand::CreateImm(BranchOffset)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeJumpTargetMM(MCInst &Inst, |
| unsigned Insn, |
| uint64_t Address, |
| const void *Decoder) { |
| unsigned JumpOffset = fieldFromInstruction(Insn, 0, 26) << 1; |
| Inst.addOperand(MCOperand::CreateImm(JumpOffset)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeSimm16(MCInst &Inst, |
| unsigned Insn, |
| uint64_t Address, |
| const void *Decoder) { |
| Inst.addOperand(MCOperand::CreateImm(SignExtend32<16>(Insn))); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeLSAImm(MCInst &Inst, |
| unsigned Insn, |
| uint64_t Address, |
| const void *Decoder) { |
| // We add one to the immediate field as it was encoded as 'imm - 1'. |
| Inst.addOperand(MCOperand::CreateImm(Insn + 1)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeInsSize(MCInst &Inst, |
| unsigned Insn, |
| uint64_t Address, |
| const void *Decoder) { |
| // First we need to grab the pos(lsb) from MCInst. |
| int Pos = Inst.getOperand(2).getImm(); |
| int Size = (int) Insn - Pos + 1; |
| Inst.addOperand(MCOperand::CreateImm(SignExtend32<16>(Size))); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeExtSize(MCInst &Inst, |
| unsigned Insn, |
| uint64_t Address, |
| const void *Decoder) { |
| int Size = (int) Insn + 1; |
| Inst.addOperand(MCOperand::CreateImm(SignExtend32<16>(Size))); |
| return MCDisassembler::Success; |
| } |