HexagonDisassembler.cpp | Explore in Territory

//===- 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
//
//===----------------------------------------------------------------------===//

#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/MCDecoderOps.h"
#include "llvm/MC/MCDisassembler/MCDisassembler.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <memory>

#define DEBUG_TYPE …

usingnamespacellvm;
usingnamespaceHexagon;

DecodeStatus;

namespace {

/// Hexagon disassembler for all Hexagon platforms.
class HexagonDisassembler : public MCDisassembler { … };

static uint64_t fullValue(HexagonDisassembler const &Disassembler, MCInst &MI,
                          int64_t Value) { … }
static HexagonDisassembler const &disassembler(const MCDisassembler *Decoder) { … }
template <size_t T>
static void signedDecoder(MCInst &MI, unsigned tmp,
                          const MCDisassembler *Decoder) { … }
}

// 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 MCDisassembler *Decoder);
static DecodeStatus
DecodeGeneralSubRegsRegisterClass(MCInst &Inst, unsigned RegNo,
                                  uint64_t Address,
                                  const MCDisassembler *Decoder);
static DecodeStatus
DecodeIntRegsLow8RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address,
                               const MCDisassembler *Decoder);
static DecodeStatus DecodeHvxVRRegisterClass(MCInst &Inst, unsigned RegNo,
                                             uint64_t Address,
                                             const MCDisassembler *Decoder);
static DecodeStatus
DecodeDoubleRegsRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address,
                              const MCDisassembler *Decoder);
static DecodeStatus
DecodeGeneralDoubleLow8RegsRegisterClass(MCInst &Inst, unsigned RegNo,
                                         uint64_t Address,
                                         const MCDisassembler *Decoder);
static DecodeStatus DecodeHvxWRRegisterClass(MCInst &Inst, unsigned RegNo,
                                             uint64_t Address,
                                             const MCDisassembler *Decoder);
static DecodeStatus DecodeHvxVQRRegisterClass(MCInst &Inst, unsigned RegNo,
                                              uint64_t Address,
                                              const MCDisassembler *Decoder);
static DecodeStatus DecodePredRegsRegisterClass(MCInst &Inst, unsigned RegNo,
                                                uint64_t Address,
                                                const MCDisassembler *Decoder);
static DecodeStatus DecodeHvxQRRegisterClass(MCInst &Inst, unsigned RegNo,
                                             uint64_t Address,
                                             const MCDisassembler *Decoder);
static DecodeStatus DecodeCtrRegsRegisterClass(MCInst &Inst, unsigned RegNo,
                                               uint64_t Address,
                                               const MCDisassembler *Decoder);
static DecodeStatus DecodeGuestRegsRegisterClass(MCInst &Inst, unsigned RegNo,
                                                 uint64_t Address,
                                                 const MCDisassembler *Decoder);
static DecodeStatus DecodeSysRegsRegisterClass(MCInst &Inst, unsigned RegNo,
                                               uint64_t Address,
                                               const MCDisassembler *Decoder);
static DecodeStatus DecodeModRegsRegisterClass(MCInst &Inst, unsigned RegNo,
                                               uint64_t Address,
                                               const MCDisassembler *Decoder);
static DecodeStatus DecodeCtrRegs64RegisterClass(MCInst &Inst, unsigned RegNo,
                                                 uint64_t Address,
                                                 const MCDisassembler *Decoder);
static DecodeStatus
DecodeGuestRegs64RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address,
                               const MCDisassembler *Decoder);
static DecodeStatus DecodeSysRegs64RegisterClass(MCInst &Inst, unsigned RegNo,
                                                 uint64_t Address,
                                                 const MCDisassembler *Decoder);

static DecodeStatus unsignedImmDecoder(MCInst &MI, unsigned tmp,
                                       uint64_t Address,
                                       const MCDisassembler *Decoder);
static DecodeStatus s32_0ImmDecoder(MCInst &MI, unsigned tmp,
                                    uint64_t /*Address*/,
                                    const MCDisassembler *Decoder);
static DecodeStatus brtargetDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
                                    const MCDisassembler *Decoder);
#include "HexagonDepDecoders.inc"
#include "HexagonGenDisassemblerTables.inc"

static MCDisassembler *createHexagonDisassembler(const Target &T,
                                                 const MCSubtargetInfo &STI,
                                                 MCContext &Ctx) { … }

extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeHexagonDisassembler() { … }

DecodeStatus HexagonDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
                                                 ArrayRef<uint8_t> Bytes,
                                                 uint64_t Address,
                                                 raw_ostream &cs) const { … }

void HexagonDisassembler::remapInstruction(MCInst &Instr) const { … }

static void adjustDuplex(MCInst &MI, MCContext &Context) { … }

DecodeStatus HexagonDisassembler::getSingleInstruction(MCInst &MI, MCInst &MCB,
                                                       ArrayRef<uint8_t> Bytes,
                                                       uint64_t Address,
                                                       raw_ostream &cs,
                                                       bool &Complete) const { … }

static DecodeStatus DecodeRegisterClass(MCInst &Inst, unsigned RegNo,
                                        ArrayRef<MCPhysReg> Table) { … }

static DecodeStatus
DecodeIntRegsLow8RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address,
                               const MCDisassembler *Decoder) { … }

static DecodeStatus DecodeIntRegsRegisterClass(MCInst &Inst, unsigned RegNo,
                                               uint64_t Address,
                                               const MCDisassembler *Decoder) { … }

static DecodeStatus
DecodeGeneralSubRegsRegisterClass(MCInst &Inst, unsigned RegNo,
                                  uint64_t Address,
                                  const MCDisassembler *Decoder) { … }

static DecodeStatus DecodeHvxVRRegisterClass(MCInst &Inst, unsigned RegNo,
                                             uint64_t /*Address*/,
                                             const MCDisassembler *Decoder) { … }

static DecodeStatus
DecodeDoubleRegsRegisterClass(MCInst &Inst, unsigned RegNo,
                              uint64_t /*Address*/,
                              const MCDisassembler *Decoder) { … }

static DecodeStatus
DecodeGeneralDoubleLow8RegsRegisterClass(MCInst &Inst, unsigned RegNo,
                                         uint64_t /*Address*/,
                                         const MCDisassembler *Decoder) { … }

static DecodeStatus DecodeHvxWRRegisterClass(MCInst &Inst, unsigned RegNo,
                                             uint64_t /*Address*/,
                                             const MCDisassembler *Decoder) { … }

LLVM_ATTRIBUTE_UNUSED // Suppress warning temporarily.
    static DecodeStatus
    DecodeHvxVQRRegisterClass(MCInst &Inst, unsigned RegNo,
                              uint64_t /*Address*/,
                              const MCDisassembler *Decoder) { … }

static DecodeStatus DecodePredRegsRegisterClass(MCInst &Inst, unsigned RegNo,
                                                uint64_t /*Address*/,
                                                const MCDisassembler *Decoder) { … }

static DecodeStatus DecodeHvxQRRegisterClass(MCInst &Inst, unsigned RegNo,
                                             uint64_t /*Address*/,
                                             const MCDisassembler *Decoder) { … }

static DecodeStatus DecodeCtrRegsRegisterClass(MCInst &Inst, unsigned RegNo,
                                               uint64_t /*Address*/,
                                               const MCDisassembler *Decoder) { … }

static DecodeStatus
DecodeCtrRegs64RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t /*Address*/,
                             const MCDisassembler *Decoder) { … }

static DecodeStatus DecodeModRegsRegisterClass(MCInst &Inst, unsigned RegNo,
                                               uint64_t /*Address*/,
                                               const MCDisassembler *Decoder) { … }

static DecodeStatus unsignedImmDecoder(MCInst &MI, unsigned tmp,
                                       uint64_t /*Address*/,
                                       const MCDisassembler *Decoder) { … }

static DecodeStatus s32_0ImmDecoder(MCInst &MI, unsigned tmp,
                                    uint64_t /*Address*/,
                                    const MCDisassembler *Decoder) { … }

// custom decoder for various jump/call immediates
static DecodeStatus brtargetDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
                                    const MCDisassembler *Decoder) { … }

static const uint16_t SysRegDecoderTable[] = …;

static DecodeStatus DecodeSysRegsRegisterClass(MCInst &Inst, unsigned RegNo,
                                               uint64_t /*Address*/,
                                               const MCDisassembler *Decoder) { … }

static const uint16_t SysReg64DecoderTable[] = …;

static DecodeStatus
DecodeSysRegs64RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t /*Address*/,
                             const MCDisassembler *Decoder) { … }

static DecodeStatus
DecodeGuestRegsRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t /*Address*/,
                             const MCDisassembler *Decoder) { … }

static DecodeStatus
DecodeGuestRegs64RegisterClass(MCInst &Inst, unsigned RegNo,
                               uint64_t /*Address*/,
                               const MCDisassembler *Decoder) { … }
llvm/llvm/lib/Target/Hexagon/Disassembler/HexagonDisassembler.cpp
