| //===- HexagonDisassembler.cpp - Disassembler for Hexagon ISA -------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #define DEBUG_TYPE "hexagon-disassembler" |
| |
| #include "MCTargetDesc/HexagonBaseInfo.h" |
| #include "MCTargetDesc/HexagonMCChecker.h" |
| #include "MCTargetDesc/HexagonMCInstrInfo.h" |
| #include "MCTargetDesc/HexagonMCTargetDesc.h" |
| #include "TargetInfo/HexagonTargetInfo.h" |
| #include "llvm/ADT/ArrayRef.h" |
| #include "llvm/ADT/STLExtras.h" |
| #include "llvm/MC/MCContext.h" |
| #include "llvm/MC/MCDisassembler/MCDisassembler.h" |
| #include "llvm/MC/MCExpr.h" |
| #include "llvm/MC/MCFixedLenDisassembler.h" |
| #include "llvm/MC/MCInst.h" |
| #include "llvm/MC/MCInstrInfo.h" |
| #include "llvm/MC/MCRegisterInfo.h" |
| #include "llvm/MC/MCSubtargetInfo.h" |
| #include "llvm/Support/Endian.h" |
| #include "llvm/Support/MathExtras.h" |
| #include "llvm/Support/TargetRegistry.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include <cassert> |
| #include <cstddef> |
| #include <cstdint> |
| #include <memory> |
| |
| using namespace llvm; |
| using namespace Hexagon; |
| |
| using DecodeStatus = MCDisassembler::DecodeStatus; |
| |
| namespace { |
| |
| /// Hexagon disassembler for all Hexagon platforms. |
| class HexagonDisassembler : public MCDisassembler { |
| public: |
| std::unique_ptr<MCInstrInfo const> const MCII; |
| std::unique_ptr<MCInst *> CurrentBundle; |
| mutable MCInst const *CurrentExtender; |
| |
| HexagonDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx, |
| MCInstrInfo const *MCII) |
| : MCDisassembler(STI, Ctx), MCII(MCII), CurrentBundle(new MCInst *), |
| CurrentExtender(nullptr) {} |
| |
| DecodeStatus getSingleInstruction(MCInst &Instr, MCInst &MCB, |
| ArrayRef<uint8_t> Bytes, uint64_t Address, |
| raw_ostream &CStream, bool &Complete) const; |
| DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size, |
| ArrayRef<uint8_t> Bytes, uint64_t Address, |
| raw_ostream &CStream) const override; |
| void remapInstruction(MCInst &Instr) const; |
| }; |
| |
| static uint64_t fullValue(HexagonDisassembler const &Disassembler, MCInst &MI, |
| int64_t Value) { |
| MCInstrInfo MCII = *Disassembler.MCII; |
| if (!Disassembler.CurrentExtender || |
| MI.size() != HexagonMCInstrInfo::getExtendableOp(MCII, MI)) |
| return Value; |
| unsigned Alignment = HexagonMCInstrInfo::getExtentAlignment(MCII, MI); |
| uint32_t Lower6 = static_cast<uint32_t>(Value >> Alignment) & 0x3f; |
| int64_t Bits; |
| bool Success = |
| Disassembler.CurrentExtender->getOperand(0).getExpr()->evaluateAsAbsolute( |
| Bits); |
| assert(Success); |
| (void)Success; |
| uint64_t Upper26 = static_cast<uint64_t>(Bits); |
| uint64_t Operand = Upper26 | Lower6; |
| return Operand; |
| } |
| static HexagonDisassembler const &disassembler(void const *Decoder) { |
| return *static_cast<HexagonDisassembler const *>(Decoder); |
| } |
| template <size_t T> |
| static void signedDecoder(MCInst &MI, unsigned tmp, const void *Decoder) { |
| HexagonDisassembler const &Disassembler = disassembler(Decoder); |
| int64_t FullValue = fullValue(Disassembler, MI, SignExtend64<T>(tmp)); |
| int64_t Extended = SignExtend64<32>(FullValue); |
| HexagonMCInstrInfo::addConstant(MI, Extended, Disassembler.getContext()); |
| } |
| } |
| |
| // Forward declare these because the auto-generated code will reference them. |
| // Definitions are further down. |
| |
| static DecodeStatus DecodeIntRegsRegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| static DecodeStatus DecodeGeneralSubRegsRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| static DecodeStatus DecodeIntRegsLow8RegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| static DecodeStatus DecodeHvxVRRegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| static DecodeStatus DecodeDoubleRegsRegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| static DecodeStatus |
| DecodeGeneralDoubleLow8RegsRegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t Address, const void *Decoder); |
| static DecodeStatus DecodeHvxWRRegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| static DecodeStatus DecodeHvxVQRRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| static DecodeStatus DecodePredRegsRegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| static DecodeStatus DecodeHvxQRRegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| static DecodeStatus DecodeCtrRegsRegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| static DecodeStatus DecodeGuestRegsRegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| static DecodeStatus DecodeModRegsRegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| static DecodeStatus DecodeCtrRegs64RegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| static DecodeStatus DecodeGuestRegs64RegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder); |
| |
| static DecodeStatus unsignedImmDecoder(MCInst &MI, unsigned tmp, |
| uint64_t Address, const void *Decoder); |
| static DecodeStatus s32_0ImmDecoder(MCInst &MI, unsigned tmp, |
| uint64_t /*Address*/, const void *Decoder); |
| static DecodeStatus brtargetDecoder(MCInst &MI, unsigned tmp, uint64_t Address, |
| const void *Decoder); |
| #include "HexagonDepDecoders.inc" |
| #include "HexagonGenDisassemblerTables.inc" |
| |
| static MCDisassembler *createHexagonDisassembler(const Target &T, |
| const MCSubtargetInfo &STI, |
| MCContext &Ctx) { |
| return new HexagonDisassembler(STI, Ctx, T.createMCInstrInfo()); |
| } |
| |
| extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeHexagonDisassembler() { |
| TargetRegistry::RegisterMCDisassembler(getTheHexagonTarget(), |
| createHexagonDisassembler); |
| } |
| |
| DecodeStatus HexagonDisassembler::getInstruction(MCInst &MI, uint64_t &Size, |
| ArrayRef<uint8_t> Bytes, |
| uint64_t Address, |
| raw_ostream &cs) const { |
| DecodeStatus Result = DecodeStatus::Success; |
| bool Complete = false; |
| Size = 0; |
| |
| *CurrentBundle = &MI; |
| MI.setOpcode(Hexagon::BUNDLE); |
| MI.addOperand(MCOperand::createImm(0)); |
| while (Result == Success && !Complete) { |
| if (Bytes.size() < HEXAGON_INSTR_SIZE) |
| return MCDisassembler::Fail; |
| MCInst *Inst = new (getContext()) MCInst; |
| Result = getSingleInstruction(*Inst, MI, Bytes, Address, cs, Complete); |
| MI.addOperand(MCOperand::createInst(Inst)); |
| Size += HEXAGON_INSTR_SIZE; |
| Bytes = Bytes.slice(HEXAGON_INSTR_SIZE); |
| } |
| if (Result == MCDisassembler::Fail) |
| return Result; |
| if (Size > HEXAGON_MAX_PACKET_SIZE) |
| return MCDisassembler::Fail; |
| HexagonMCChecker Checker(getContext(), *MCII, STI, MI, |
| *getContext().getRegisterInfo(), false); |
| if (!Checker.check()) |
| return MCDisassembler::Fail; |
| remapInstruction(MI); |
| return MCDisassembler::Success; |
| } |
| |
| void HexagonDisassembler::remapInstruction(MCInst &Instr) const { |
| for (auto I: HexagonMCInstrInfo::bundleInstructions(Instr)) { |
| auto &MI = const_cast<MCInst &>(*I.getInst()); |
| switch (MI.getOpcode()) { |
| case Hexagon::S2_allocframe: |
| if (MI.getOperand(0).getReg() == Hexagon::R29) { |
| MI.setOpcode(Hexagon::S6_allocframe_to_raw); |
| MI.erase(MI.begin () + 1); |
| MI.erase(MI.begin ()); |
| } |
| break; |
| case Hexagon::L2_deallocframe: |
| if (MI.getOperand(0).getReg() == Hexagon::D15 && |
| MI.getOperand(1).getReg() == Hexagon::R30) { |
| MI.setOpcode(L6_deallocframe_map_to_raw); |
| MI.erase(MI.begin () + 1); |
| MI.erase(MI.begin ()); |
| } |
| break; |
| case Hexagon::L4_return: |
| if (MI.getOperand(0).getReg() == Hexagon::D15 && |
| MI.getOperand(1).getReg() == Hexagon::R30) { |
| MI.setOpcode(L6_return_map_to_raw); |
| MI.erase(MI.begin () + 1); |
| MI.erase(MI.begin ()); |
| } |
| break; |
| case Hexagon::L4_return_t: |
| if (MI.getOperand(0).getReg() == Hexagon::D15 && |
| MI.getOperand(2).getReg() == Hexagon::R30) { |
| MI.setOpcode(L4_return_map_to_raw_t); |
| MI.erase(MI.begin () + 2); |
| MI.erase(MI.begin ()); |
| } |
| break; |
| case Hexagon::L4_return_f: |
| if (MI.getOperand(0).getReg() == Hexagon::D15 && |
| MI.getOperand(2).getReg() == Hexagon::R30) { |
| MI.setOpcode(L4_return_map_to_raw_f); |
| MI.erase(MI.begin () + 2); |
| MI.erase(MI.begin ()); |
| } |
| break; |
| case Hexagon::L4_return_tnew_pt: |
| if (MI.getOperand(0).getReg() == Hexagon::D15 && |
| MI.getOperand(2).getReg() == Hexagon::R30) { |
| MI.setOpcode(L4_return_map_to_raw_tnew_pt); |
| MI.erase(MI.begin () + 2); |
| MI.erase(MI.begin ()); |
| } |
| break; |
| case Hexagon::L4_return_fnew_pt: |
| if (MI.getOperand(0).getReg() == Hexagon::D15 && |
| MI.getOperand(2).getReg() == Hexagon::R30) { |
| MI.setOpcode(L4_return_map_to_raw_fnew_pt); |
| MI.erase(MI.begin () + 2); |
| MI.erase(MI.begin ()); |
| } |
| break; |
| case Hexagon::L4_return_tnew_pnt: |
| if (MI.getOperand(0).getReg() == Hexagon::D15 && |
| MI.getOperand(2).getReg() == Hexagon::R30) { |
| MI.setOpcode(L4_return_map_to_raw_tnew_pnt); |
| MI.erase(MI.begin () + 2); |
| MI.erase(MI.begin ()); |
| } |
| break; |
| case Hexagon::L4_return_fnew_pnt: |
| if (MI.getOperand(0).getReg() == Hexagon::D15 && |
| MI.getOperand(2).getReg() == Hexagon::R30) { |
| MI.setOpcode(L4_return_map_to_raw_fnew_pnt); |
| MI.erase(MI.begin () + 2); |
| MI.erase(MI.begin ()); |
| } |
| break; |
| } |
| } |
| } |
| |
| static void adjustDuplex(MCInst &MI, MCContext &Context) { |
| switch (MI.getOpcode()) { |
| case Hexagon::SA1_setin1: |
| MI.insert(MI.begin() + 1, |
| MCOperand::createExpr(MCConstantExpr::create(-1, Context))); |
| break; |
| case Hexagon::SA1_dec: |
| MI.insert(MI.begin() + 2, |
| MCOperand::createExpr(MCConstantExpr::create(-1, Context))); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| DecodeStatus HexagonDisassembler::getSingleInstruction(MCInst &MI, MCInst &MCB, |
| ArrayRef<uint8_t> Bytes, |
| uint64_t Address, |
| raw_ostream &cs, |
| bool &Complete) const { |
| assert(Bytes.size() >= HEXAGON_INSTR_SIZE); |
| |
| uint32_t Instruction = support::endian::read32le(Bytes.data()); |
| |
| auto BundleSize = HexagonMCInstrInfo::bundleSize(MCB); |
| if ((Instruction & HexagonII::INST_PARSE_MASK) == |
| HexagonII::INST_PARSE_LOOP_END) { |
| if (BundleSize == 0) |
| HexagonMCInstrInfo::setInnerLoop(MCB); |
| else if (BundleSize == 1) |
| HexagonMCInstrInfo::setOuterLoop(MCB); |
| else |
| return DecodeStatus::Fail; |
| } |
| |
| CurrentExtender = HexagonMCInstrInfo::extenderForIndex( |
| MCB, HexagonMCInstrInfo::bundleSize(MCB)); |
| |
| DecodeStatus Result = DecodeStatus::Fail; |
| if ((Instruction & HexagonII::INST_PARSE_MASK) == |
| HexagonII::INST_PARSE_DUPLEX) { |
| unsigned duplexIClass; |
| uint8_t const *DecodeLow, *DecodeHigh; |
| duplexIClass = ((Instruction >> 28) & 0xe) | ((Instruction >> 13) & 0x1); |
| switch (duplexIClass) { |
| default: |
| return MCDisassembler::Fail; |
| case 0: |
| DecodeLow = DecoderTableSUBINSN_L132; |
| DecodeHigh = DecoderTableSUBINSN_L132; |
| break; |
| case 1: |
| DecodeLow = DecoderTableSUBINSN_L232; |
| DecodeHigh = DecoderTableSUBINSN_L132; |
| break; |
| case 2: |
| DecodeLow = DecoderTableSUBINSN_L232; |
| DecodeHigh = DecoderTableSUBINSN_L232; |
| break; |
| case 3: |
| DecodeLow = DecoderTableSUBINSN_A32; |
| DecodeHigh = DecoderTableSUBINSN_A32; |
| break; |
| case 4: |
| DecodeLow = DecoderTableSUBINSN_L132; |
| DecodeHigh = DecoderTableSUBINSN_A32; |
| break; |
| case 5: |
| DecodeLow = DecoderTableSUBINSN_L232; |
| DecodeHigh = DecoderTableSUBINSN_A32; |
| break; |
| case 6: |
| DecodeLow = DecoderTableSUBINSN_S132; |
| DecodeHigh = DecoderTableSUBINSN_A32; |
| break; |
| case 7: |
| DecodeLow = DecoderTableSUBINSN_S232; |
| DecodeHigh = DecoderTableSUBINSN_A32; |
| break; |
| case 8: |
| DecodeLow = DecoderTableSUBINSN_S132; |
| DecodeHigh = DecoderTableSUBINSN_L132; |
| break; |
| case 9: |
| DecodeLow = DecoderTableSUBINSN_S132; |
| DecodeHigh = DecoderTableSUBINSN_L232; |
| break; |
| case 10: |
| DecodeLow = DecoderTableSUBINSN_S132; |
| DecodeHigh = DecoderTableSUBINSN_S132; |
| break; |
| case 11: |
| DecodeLow = DecoderTableSUBINSN_S232; |
| DecodeHigh = DecoderTableSUBINSN_S132; |
| break; |
| case 12: |
| DecodeLow = DecoderTableSUBINSN_S232; |
| DecodeHigh = DecoderTableSUBINSN_L132; |
| break; |
| case 13: |
| DecodeLow = DecoderTableSUBINSN_S232; |
| DecodeHigh = DecoderTableSUBINSN_L232; |
| break; |
| case 14: |
| DecodeLow = DecoderTableSUBINSN_S232; |
| DecodeHigh = DecoderTableSUBINSN_S232; |
| break; |
| } |
| MI.setOpcode(Hexagon::DuplexIClass0 + duplexIClass); |
| MCInst *MILow = new (getContext()) MCInst; |
| MCInst *MIHigh = new (getContext()) MCInst; |
| auto TmpExtender = CurrentExtender; |
| CurrentExtender = |
| nullptr; // constant extenders in duplex must always be in slot 1 |
| Result = decodeInstruction(DecodeLow, *MILow, Instruction & 0x1fff, Address, |
| this, STI); |
| CurrentExtender = TmpExtender; |
| if (Result != DecodeStatus::Success) |
| return DecodeStatus::Fail; |
| adjustDuplex(*MILow, getContext()); |
| Result = decodeInstruction( |
| DecodeHigh, *MIHigh, (Instruction >> 16) & 0x1fff, Address, this, STI); |
| if (Result != DecodeStatus::Success) |
| return DecodeStatus::Fail; |
| adjustDuplex(*MIHigh, getContext()); |
| MCOperand OPLow = MCOperand::createInst(MILow); |
| MCOperand OPHigh = MCOperand::createInst(MIHigh); |
| MI.addOperand(OPLow); |
| MI.addOperand(OPHigh); |
| Complete = true; |
| } else { |
| if ((Instruction & HexagonII::INST_PARSE_MASK) == |
| HexagonII::INST_PARSE_PACKET_END) |
| Complete = true; |
| |
| if (CurrentExtender != nullptr) |
| Result = decodeInstruction(DecoderTableMustExtend32, MI, Instruction, |
| Address, this, STI); |
| |
| if (Result != MCDisassembler::Success) |
| Result = decodeInstruction(DecoderTable32, MI, Instruction, Address, this, |
| STI); |
| |
| if (Result != MCDisassembler::Success && |
| STI.getFeatureBits()[Hexagon::ExtensionHVX]) |
| Result = decodeInstruction(DecoderTableEXT_mmvec32, MI, Instruction, |
| Address, this, STI); |
| |
| } |
| |
| switch (MI.getOpcode()) { |
| case Hexagon::J4_cmpeqn1_f_jumpnv_nt: |
| case Hexagon::J4_cmpeqn1_f_jumpnv_t: |
| case Hexagon::J4_cmpeqn1_fp0_jump_nt: |
| case Hexagon::J4_cmpeqn1_fp0_jump_t: |
| case Hexagon::J4_cmpeqn1_fp1_jump_nt: |
| case Hexagon::J4_cmpeqn1_fp1_jump_t: |
| case Hexagon::J4_cmpeqn1_t_jumpnv_nt: |
| case Hexagon::J4_cmpeqn1_t_jumpnv_t: |
| case Hexagon::J4_cmpeqn1_tp0_jump_nt: |
| case Hexagon::J4_cmpeqn1_tp0_jump_t: |
| case Hexagon::J4_cmpeqn1_tp1_jump_nt: |
| case Hexagon::J4_cmpeqn1_tp1_jump_t: |
| case Hexagon::J4_cmpgtn1_f_jumpnv_nt: |
| case Hexagon::J4_cmpgtn1_f_jumpnv_t: |
| case Hexagon::J4_cmpgtn1_fp0_jump_nt: |
| case Hexagon::J4_cmpgtn1_fp0_jump_t: |
| case Hexagon::J4_cmpgtn1_fp1_jump_nt: |
| case Hexagon::J4_cmpgtn1_fp1_jump_t: |
| case Hexagon::J4_cmpgtn1_t_jumpnv_nt: |
| case Hexagon::J4_cmpgtn1_t_jumpnv_t: |
| case Hexagon::J4_cmpgtn1_tp0_jump_nt: |
| case Hexagon::J4_cmpgtn1_tp0_jump_t: |
| case Hexagon::J4_cmpgtn1_tp1_jump_nt: |
| case Hexagon::J4_cmpgtn1_tp1_jump_t: |
| MI.insert(MI.begin() + 1, |
| MCOperand::createExpr(MCConstantExpr::create(-1, getContext()))); |
| break; |
| default: |
| break; |
| } |
| |
| if (HexagonMCInstrInfo::isNewValue(*MCII, MI)) { |
| unsigned OpIndex = HexagonMCInstrInfo::getNewValueOp(*MCII, MI); |
| MCOperand &MCO = MI.getOperand(OpIndex); |
| assert(MCO.isReg() && "New value consumers must be registers"); |
| unsigned Register = |
| getContext().getRegisterInfo()->getEncodingValue(MCO.getReg()); |
| if ((Register & 0x6) == 0) |
| // HexagonPRM 10.11 Bit 1-2 == 0 is reserved |
| return MCDisassembler::Fail; |
| unsigned Lookback = (Register & 0x6) >> 1; |
| unsigned Offset = 1; |
| bool Vector = HexagonMCInstrInfo::isVector(*MCII, MI); |
| bool PrevVector = false; |
| auto Instructions = HexagonMCInstrInfo::bundleInstructions(**CurrentBundle); |
| auto i = Instructions.end() - 1; |
| for (auto n = Instructions.begin() - 1;; --i, ++Offset) { |
| if (i == n) |
| // Couldn't find producer |
| return MCDisassembler::Fail; |
| bool CurrentVector = HexagonMCInstrInfo::isVector(*MCII, *i->getInst()); |
| if (Vector && !CurrentVector) |
| // Skip scalars when calculating distances for vectors |
| ++Lookback; |
| if (HexagonMCInstrInfo::isImmext(*i->getInst()) && (Vector == PrevVector)) |
| ++Lookback; |
| PrevVector = CurrentVector; |
| if (Offset == Lookback) |
| break; |
| } |
| auto const &Inst = *i->getInst(); |
| bool SubregBit = (Register & 0x1) != 0; |
| if (HexagonMCInstrInfo::hasNewValue2(*MCII, Inst)) { |
| // If subreg bit is set we're selecting the second produced newvalue |
| unsigned Producer = SubregBit ? |
| HexagonMCInstrInfo::getNewValueOperand(*MCII, Inst).getReg() : |
| HexagonMCInstrInfo::getNewValueOperand2(*MCII, Inst).getReg(); |
| assert(Producer != Hexagon::NoRegister); |
| MCO.setReg(Producer); |
| } else if (HexagonMCInstrInfo::hasNewValue(*MCII, Inst)) { |
| unsigned Producer = |
| HexagonMCInstrInfo::getNewValueOperand(*MCII, Inst).getReg(); |
| if (Producer >= Hexagon::W0 && Producer <= Hexagon::W15) |
| Producer = ((Producer - Hexagon::W0) << 1) + SubregBit + Hexagon::V0; |
| else if (SubregBit) |
| // Hexagon PRM 10.11 New-value operands |
| // Nt[0] is reserved and should always be encoded as zero. |
| return MCDisassembler::Fail; |
| assert(Producer != Hexagon::NoRegister); |
| MCO.setReg(Producer); |
| } else |
| return MCDisassembler::Fail; |
| } |
| |
| if (CurrentExtender != nullptr) { |
| MCInst const &Inst = HexagonMCInstrInfo::isDuplex(*MCII, MI) |
| ? *MI.getOperand(1).getInst() |
| : MI; |
| if (!HexagonMCInstrInfo::isExtendable(*MCII, Inst) && |
| !HexagonMCInstrInfo::isExtended(*MCII, Inst)) |
| return MCDisassembler::Fail; |
| } |
| return Result; |
| } |
| |
| static DecodeStatus DecodeRegisterClass(MCInst &Inst, unsigned RegNo, |
| ArrayRef<MCPhysReg> Table) { |
| if (RegNo < Table.size()) { |
| Inst.addOperand(MCOperand::createReg(Table[RegNo])); |
| return MCDisassembler::Success; |
| } |
| |
| return MCDisassembler::Fail; |
| } |
| |
| static DecodeStatus DecodeIntRegsLow8RegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| return DecodeIntRegsRegisterClass(Inst, RegNo, Address, Decoder); |
| } |
| |
| static DecodeStatus DecodeIntRegsRegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| static const MCPhysReg IntRegDecoderTable[] = { |
| Hexagon::R0, Hexagon::R1, Hexagon::R2, Hexagon::R3, Hexagon::R4, |
| Hexagon::R5, Hexagon::R6, Hexagon::R7, Hexagon::R8, Hexagon::R9, |
| Hexagon::R10, Hexagon::R11, Hexagon::R12, Hexagon::R13, Hexagon::R14, |
| Hexagon::R15, Hexagon::R16, Hexagon::R17, Hexagon::R18, Hexagon::R19, |
| Hexagon::R20, Hexagon::R21, Hexagon::R22, Hexagon::R23, Hexagon::R24, |
| Hexagon::R25, Hexagon::R26, Hexagon::R27, Hexagon::R28, Hexagon::R29, |
| Hexagon::R30, Hexagon::R31}; |
| |
| return DecodeRegisterClass(Inst, RegNo, IntRegDecoderTable); |
| } |
| |
| static DecodeStatus DecodeGeneralSubRegsRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t Address, |
| const void *Decoder) { |
| static const MCPhysReg GeneralSubRegDecoderTable[] = { |
| Hexagon::R0, Hexagon::R1, Hexagon::R2, Hexagon::R3, |
| Hexagon::R4, Hexagon::R5, Hexagon::R6, Hexagon::R7, |
| Hexagon::R16, Hexagon::R17, Hexagon::R18, Hexagon::R19, |
| Hexagon::R20, Hexagon::R21, Hexagon::R22, Hexagon::R23, |
| }; |
| |
| return DecodeRegisterClass(Inst, RegNo, GeneralSubRegDecoderTable); |
| } |
| |
| static DecodeStatus DecodeHvxVRRegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t /*Address*/, |
| const void *Decoder) { |
| static const MCPhysReg HvxVRDecoderTable[] = { |
| Hexagon::V0, Hexagon::V1, Hexagon::V2, Hexagon::V3, Hexagon::V4, |
| Hexagon::V5, Hexagon::V6, Hexagon::V7, Hexagon::V8, Hexagon::V9, |
| Hexagon::V10, Hexagon::V11, Hexagon::V12, Hexagon::V13, Hexagon::V14, |
| Hexagon::V15, Hexagon::V16, Hexagon::V17, Hexagon::V18, Hexagon::V19, |
| Hexagon::V20, Hexagon::V21, Hexagon::V22, Hexagon::V23, Hexagon::V24, |
| Hexagon::V25, Hexagon::V26, Hexagon::V27, Hexagon::V28, Hexagon::V29, |
| Hexagon::V30, Hexagon::V31}; |
| |
| return DecodeRegisterClass(Inst, RegNo, HvxVRDecoderTable); |
| } |
| |
| static DecodeStatus DecodeDoubleRegsRegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t /*Address*/, |
| const void *Decoder) { |
| static const MCPhysReg DoubleRegDecoderTable[] = { |
| Hexagon::D0, Hexagon::D1, Hexagon::D2, Hexagon::D3, |
| Hexagon::D4, Hexagon::D5, Hexagon::D6, Hexagon::D7, |
| Hexagon::D8, Hexagon::D9, Hexagon::D10, Hexagon::D11, |
| Hexagon::D12, Hexagon::D13, Hexagon::D14, Hexagon::D15}; |
| |
| return DecodeRegisterClass(Inst, RegNo >> 1, DoubleRegDecoderTable); |
| } |
| |
| static DecodeStatus DecodeGeneralDoubleLow8RegsRegisterClass( |
| MCInst &Inst, unsigned RegNo, uint64_t /*Address*/, const void *Decoder) { |
| static const MCPhysReg GeneralDoubleLow8RegDecoderTable[] = { |
| Hexagon::D0, Hexagon::D1, Hexagon::D2, Hexagon::D3, |
| Hexagon::D8, Hexagon::D9, Hexagon::D10, Hexagon::D11}; |
| |
| return DecodeRegisterClass(Inst, RegNo, GeneralDoubleLow8RegDecoderTable); |
| } |
| |
| static DecodeStatus DecodeHvxWRRegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t /*Address*/, |
| const void *Decoder) { |
| static const MCPhysReg HvxWRDecoderTable[] = { |
| Hexagon::W0, Hexagon::W1, Hexagon::W2, Hexagon::W3, |
| Hexagon::W4, Hexagon::W5, Hexagon::W6, Hexagon::W7, |
| Hexagon::W8, Hexagon::W9, Hexagon::W10, Hexagon::W11, |
| Hexagon::W12, Hexagon::W13, Hexagon::W14, Hexagon::W15}; |
| |
| return (DecodeRegisterClass(Inst, RegNo >> 1, HvxWRDecoderTable)); |
| } |
| |
| LLVM_ATTRIBUTE_UNUSED // Suppress warning temporarily. |
| static DecodeStatus DecodeHvxVQRRegisterClass(MCInst &Inst, |
| unsigned RegNo, |
| uint64_t /*Address*/, |
| const void *Decoder) { |
| static const MCPhysReg HvxVQRDecoderTable[] = { |
| Hexagon::VQ0, Hexagon::VQ1, Hexagon::VQ2, Hexagon::VQ3, |
| Hexagon::VQ4, Hexagon::VQ5, Hexagon::VQ6, Hexagon::VQ7}; |
| |
| return DecodeRegisterClass(Inst, RegNo >> 2, HvxVQRDecoderTable); |
| } |
| |
| static DecodeStatus DecodePredRegsRegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t /*Address*/, |
| const void *Decoder) { |
| static const MCPhysReg PredRegDecoderTable[] = {Hexagon::P0, Hexagon::P1, |
| Hexagon::P2, Hexagon::P3}; |
| |
| return DecodeRegisterClass(Inst, RegNo, PredRegDecoderTable); |
| } |
| |
| static DecodeStatus DecodeHvxQRRegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t /*Address*/, |
| const void *Decoder) { |
| static const MCPhysReg HvxQRDecoderTable[] = {Hexagon::Q0, Hexagon::Q1, |
| Hexagon::Q2, Hexagon::Q3}; |
| |
| return DecodeRegisterClass(Inst, RegNo, HvxQRDecoderTable); |
| } |
| |
| static DecodeStatus DecodeCtrRegsRegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t /*Address*/, |
| const void *Decoder) { |
| using namespace Hexagon; |
| |
| static const MCPhysReg CtrlRegDecoderTable[] = { |
| /* 0 */ SA0, LC0, SA1, LC1, |
| /* 4 */ P3_0, C5, M0, M1, |
| /* 8 */ USR, PC, UGP, GP, |
| /* 12 */ CS0, CS1, UPCYCLELO, UPCYCLEHI, |
| /* 16 */ FRAMELIMIT, FRAMEKEY, PKTCOUNTLO, PKTCOUNTHI, |
| /* 20 */ 0, 0, 0, 0, |
| /* 24 */ 0, 0, 0, 0, |
| /* 28 */ 0, 0, UTIMERLO, UTIMERHI |
| }; |
| |
| if (RegNo >= array_lengthof(CtrlRegDecoderTable)) |
| return MCDisassembler::Fail; |
| |
| static_assert(NoRegister == 0, "Expecting NoRegister to be 0"); |
| if (CtrlRegDecoderTable[RegNo] == NoRegister) |
| return MCDisassembler::Fail; |
| |
| unsigned Register = CtrlRegDecoderTable[RegNo]; |
| Inst.addOperand(MCOperand::createReg(Register)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeCtrRegs64RegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t /*Address*/, |
| const void *Decoder) { |
| using namespace Hexagon; |
| |
| static const MCPhysReg CtrlReg64DecoderTable[] = { |
| /* 0 */ C1_0, 0, C3_2, 0, |
| /* 4 */ C5_4, 0, C7_6, 0, |
| /* 8 */ C9_8, 0, C11_10, 0, |
| /* 12 */ CS, 0, UPCYCLE, 0, |
| /* 16 */ C17_16, 0, PKTCOUNT, 0, |
| /* 20 */ 0, 0, 0, 0, |
| /* 24 */ 0, 0, 0, 0, |
| /* 28 */ 0, 0, UTIMER, 0 |
| }; |
| |
| if (RegNo >= array_lengthof(CtrlReg64DecoderTable)) |
| return MCDisassembler::Fail; |
| |
| static_assert(NoRegister == 0, "Expecting NoRegister to be 0"); |
| if (CtrlReg64DecoderTable[RegNo] == NoRegister) |
| return MCDisassembler::Fail; |
| |
| unsigned Register = CtrlReg64DecoderTable[RegNo]; |
| Inst.addOperand(MCOperand::createReg(Register)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeModRegsRegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t /*Address*/, |
| const void *Decoder) { |
| unsigned Register = 0; |
| switch (RegNo) { |
| case 0: |
| Register = Hexagon::M0; |
| break; |
| case 1: |
| Register = Hexagon::M1; |
| break; |
| default: |
| return MCDisassembler::Fail; |
| } |
| Inst.addOperand(MCOperand::createReg(Register)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus unsignedImmDecoder(MCInst &MI, unsigned tmp, |
| uint64_t /*Address*/, |
| const void *Decoder) { |
| HexagonDisassembler const &Disassembler = disassembler(Decoder); |
| int64_t FullValue = fullValue(Disassembler, MI, tmp); |
| assert(FullValue >= 0 && "Negative in unsigned decoder"); |
| HexagonMCInstrInfo::addConstant(MI, FullValue, Disassembler.getContext()); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus s32_0ImmDecoder(MCInst &MI, unsigned tmp, |
| uint64_t /*Address*/, const void *Decoder) { |
| HexagonDisassembler const &Disassembler = disassembler(Decoder); |
| unsigned Bits = HexagonMCInstrInfo::getExtentBits(*Disassembler.MCII, MI); |
| tmp = SignExtend64(tmp, Bits); |
| signedDecoder<32>(MI, tmp, Decoder); |
| return MCDisassembler::Success; |
| } |
| |
| // custom decoder for various jump/call immediates |
| static DecodeStatus brtargetDecoder(MCInst &MI, unsigned tmp, uint64_t Address, |
| const void *Decoder) { |
| HexagonDisassembler const &Disassembler = disassembler(Decoder); |
| unsigned Bits = HexagonMCInstrInfo::getExtentBits(*Disassembler.MCII, MI); |
| // r13_2 is not extendable, so if there are no extent bits, it's r13_2 |
| if (Bits == 0) |
| Bits = 15; |
| uint64_t FullValue = fullValue(Disassembler, MI, SignExtend64(tmp, Bits)); |
| uint32_t Extended = FullValue + Address; |
| if (!Disassembler.tryAddingSymbolicOperand(MI, Extended, Address, true, 0, 4)) |
| HexagonMCInstrInfo::addConstant(MI, Extended, Disassembler.getContext()); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeGuestRegsRegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t /*Address*/, |
| const void *Decoder) { |
| using namespace Hexagon; |
| |
| static const MCPhysReg GuestRegDecoderTable[] = { |
| /* 0 */ GELR, GSR, GOSP, G3, |
| /* 4 */ G4, G5, G6, G7, |
| /* 8 */ G8, G9, G10, G11, |
| /* 12 */ G12, G13, G14, G15, |
| /* 16 */ GPMUCNT4, GPMUCNT5, GPMUCNT6, GPMUCNT7, |
| /* 20 */ G20, G21, G22, G23, |
| /* 24 */ GPCYCLELO, GPCYCLEHI, GPMUCNT0, GPMUCNT1, |
| /* 28 */ GPMUCNT2, GPMUCNT3, G30, G31 |
| }; |
| |
| if (RegNo >= array_lengthof(GuestRegDecoderTable)) |
| return MCDisassembler::Fail; |
| if (GuestRegDecoderTable[RegNo] == Hexagon::NoRegister) |
| return MCDisassembler::Fail; |
| |
| unsigned Register = GuestRegDecoderTable[RegNo]; |
| Inst.addOperand(MCOperand::createReg(Register)); |
| return MCDisassembler::Success; |
| } |
| |
| static DecodeStatus DecodeGuestRegs64RegisterClass(MCInst &Inst, unsigned RegNo, |
| uint64_t /*Address*/, |
| const void *Decoder) { |
| using namespace Hexagon; |
| |
| static const MCPhysReg GuestReg64DecoderTable[] = { |
| /* 0 */ G1_0, 0, G3_2, 0, |
| /* 4 */ G5_4, 0, G7_6, 0, |
| /* 8 */ G9_8, 0, G11_10, 0, |
| /* 12 */ G13_12, 0, G15_14, 0, |
| /* 16 */ G17_16, 0, G19_18, 0, |
| /* 20 */ G21_20, 0, G23_22, 0, |
| /* 24 */ G25_24, 0, G27_26, 0, |
| /* 28 */ G29_28, 0, G31_30, 0 |
| }; |
| |
| if (RegNo >= array_lengthof(GuestReg64DecoderTable)) |
| return MCDisassembler::Fail; |
| if (GuestReg64DecoderTable[RegNo] == Hexagon::NoRegister) |
| return MCDisassembler::Fail; |
| |
| unsigned Register = GuestReg64DecoderTable[RegNo]; |
| Inst.addOperand(MCOperand::createReg(Register)); |
| return MCDisassembler::Success; |
| } |
