llvm/llvm/lib/Target/Lanai/Disassembler/LanaiDisassembler.cpp

//===- LanaiDisassembler.cpp - Disassembler for Lanai -----------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file is part of the Lanai Disassembler.
//
//===----------------------------------------------------------------------===//

#include "LanaiDisassembler.h"

#include "LanaiAluCode.h"
#include "LanaiCondCode.h"
#include "LanaiInstrInfo.h"
#include "TargetInfo/LanaiTargetInfo.h"
#include "llvm/MC/MCDecoderOps.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Support/MathExtras.h"

usingnamespacellvm;

DecodeStatus;

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

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

LanaiDisassembler::LanaiDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx)
    : … { … }

// Forward declare because the autogenerated code will reference this.
// Definition is further down.
static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
                                           uint64_t Address,
                                           const MCDisassembler *Decoder);

static DecodeStatus decodeRiMemoryValue(MCInst &Inst, unsigned Insn,
                                        uint64_t Address,
                                        const MCDisassembler *Decoder);

static DecodeStatus decodeRrMemoryValue(MCInst &Inst, unsigned Insn,
                                        uint64_t Address,
                                        const MCDisassembler *Decoder);

static DecodeStatus decodeSplsValue(MCInst &Inst, unsigned Insn,
                                    uint64_t Address,
                                    const MCDisassembler *Decoder);

static DecodeStatus decodeBranch(MCInst &Inst, unsigned Insn, uint64_t Address,
                                 const MCDisassembler *Decoder);

static DecodeStatus decodePredicateOperand(MCInst &Inst, unsigned Val,
                                           uint64_t Address,
                                           const MCDisassembler *Decoder);

static DecodeStatus decodeShiftImm(MCInst &Inst, unsigned Insn,
                                   uint64_t Address,
                                   const MCDisassembler *Decoder);

#include "LanaiGenDisassemblerTables.inc"

static DecodeStatus readInstruction32(ArrayRef<uint8_t> Bytes, uint64_t &Size,
                                      uint32_t &Insn) { … }

static void PostOperandDecodeAdjust(MCInst &Instr, uint32_t Insn) { … }

DecodeStatus
LanaiDisassembler::getInstruction(MCInst &Instr, uint64_t &Size,
                                  ArrayRef<uint8_t> Bytes, uint64_t Address,
                                  raw_ostream & /*CStream*/) const { … }

static const unsigned GPRDecoderTable[] = …;

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

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

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

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

static bool tryAddingSymbolicOperand(int64_t Value, bool IsBranch,
                                     uint64_t Address, uint64_t Offset,
                                     uint64_t Width, MCInst &MI,
                                     const MCDisassembler *Decoder) { … }

static DecodeStatus decodeBranch(MCInst &MI, unsigned Insn, uint64_t Address,
                                 const MCDisassembler *Decoder) { … }

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

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