llvm/llvm/lib/Target/XCore/Disassembler/XCoreDisassembler.cpp

//===- XCoreDisassembler.cpp - Disassembler for XCore -----------*- 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
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This file is part of the XCore Disassembler.
///
//===----------------------------------------------------------------------===//

#include "TargetInfo/XCoreTargetInfo.h"
#include "XCore.h"
#include "XCoreRegisterInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDecoderOps.h"
#include "llvm/MC/MCDisassembler/MCDisassembler.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/TargetRegistry.h"

usingnamespacellvm;

#define DEBUG_TYPE …

DecodeStatus;

namespace {

/// A disassembler class for XCore.
class XCoreDisassembler : public MCDisassembler { … };
}

static bool readInstruction16(ArrayRef<uint8_t> Bytes, uint64_t Address,
                              uint64_t &Size, uint16_t &Insn) { … }

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

static unsigned getReg(const MCDisassembler *D, unsigned RC, unsigned RegNo) { … }

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

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

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

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

static DecodeStatus Decode2RInstruction(MCInst &Inst, unsigned Insn,
                                        uint64_t Address,
                                        const MCDisassembler *Decoder);

static DecodeStatus Decode2RImmInstruction(MCInst &Inst, unsigned Insn,
                                           uint64_t Address,
                                           const MCDisassembler *Decoder);

static DecodeStatus DecodeR2RInstruction(MCInst &Inst, unsigned Insn,
                                         uint64_t Address,
                                         const MCDisassembler *Decoder);

static DecodeStatus Decode2RSrcDstInstruction(MCInst &Inst, unsigned Insn,
                                              uint64_t Address,
                                              const MCDisassembler *Decoder);

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

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

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

static DecodeStatus DecodeL2RInstruction(MCInst &Inst, unsigned Insn,
                                         uint64_t Address,
                                         const MCDisassembler *Decoder);

static DecodeStatus DecodeLR2RInstruction(MCInst &Inst, unsigned Insn,
                                          uint64_t Address,
                                          const MCDisassembler *Decoder);

static DecodeStatus Decode3RInstruction(MCInst &Inst, unsigned Insn,
                                        uint64_t Address,
                                        const MCDisassembler *Decoder);

static DecodeStatus Decode3RImmInstruction(MCInst &Inst, unsigned Insn,
                                           uint64_t Address,
                                           const MCDisassembler *Decoder);

static DecodeStatus Decode2RUSInstruction(MCInst &Inst, unsigned Insn,
                                          uint64_t Address,
                                          const MCDisassembler *Decoder);

static DecodeStatus Decode2RUSBitpInstruction(MCInst &Inst, unsigned Insn,
                                              uint64_t Address,
                                              const MCDisassembler *Decoder);

static DecodeStatus DecodeL3RInstruction(MCInst &Inst, unsigned Insn,
                                         uint64_t Address,
                                         const MCDisassembler *Decoder);

static DecodeStatus DecodeL3RSrcDstInstruction(MCInst &Inst, unsigned Insn,
                                               uint64_t Address,
                                               const MCDisassembler *Decoder);

static DecodeStatus DecodeL2RUSInstruction(MCInst &Inst, unsigned Insn,
                                           uint64_t Address,
                                           const MCDisassembler *Decoder);

static DecodeStatus DecodeL2RUSBitpInstruction(MCInst &Inst, unsigned Insn,
                                               uint64_t Address,
                                               const MCDisassembler *Decoder);

static DecodeStatus DecodeL6RInstruction(MCInst &Inst, unsigned Insn,
                                         uint64_t Address,
                                         const MCDisassembler *Decoder);

static DecodeStatus DecodeL5RInstruction(MCInst &Inst, unsigned Insn,
                                         uint64_t Address,
                                         const MCDisassembler *Decoder);

static DecodeStatus DecodeL4RSrcDstInstruction(MCInst &Inst, unsigned Insn,
                                               uint64_t Address,
                                               const MCDisassembler *Decoder);

static DecodeStatus
DecodeL4RSrcDstSrcDstInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
                                 const MCDisassembler *Decoder);

#include "XCoreGenDisassemblerTables.inc"

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

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

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

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

static DecodeStatus
Decode2OpInstruction(unsigned Insn, unsigned &Op1, unsigned &Op2) { … }

static DecodeStatus
Decode3OpInstruction(unsigned Insn, unsigned &Op1, unsigned &Op2,
                     unsigned &Op3) { … }

static DecodeStatus Decode2OpInstructionFail(MCInst &Inst, unsigned Insn,
                                             uint64_t Address,
                                             const MCDisassembler *Decoder) { … }

static DecodeStatus Decode2RInstruction(MCInst &Inst, unsigned Insn,
                                        uint64_t Address,
                                        const MCDisassembler *Decoder) { … }

static DecodeStatus Decode2RImmInstruction(MCInst &Inst, unsigned Insn,
                                           uint64_t Address,
                                           const MCDisassembler *Decoder) { … }

static DecodeStatus DecodeR2RInstruction(MCInst &Inst, unsigned Insn,
                                         uint64_t Address,
                                         const MCDisassembler *Decoder) { … }

static DecodeStatus Decode2RSrcDstInstruction(MCInst &Inst, unsigned Insn,
                                              uint64_t Address,
                                              const MCDisassembler *Decoder) { … }

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

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

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

static DecodeStatus DecodeL2OpInstructionFail(MCInst &Inst, unsigned Insn,
                                              uint64_t Address,
                                              const MCDisassembler *Decoder) { … }

static DecodeStatus DecodeL2RInstruction(MCInst &Inst, unsigned Insn,
                                         uint64_t Address,
                                         const MCDisassembler *Decoder) { … }

static DecodeStatus DecodeLR2RInstruction(MCInst &Inst, unsigned Insn,
                                          uint64_t Address,
                                          const MCDisassembler *Decoder) { … }

static DecodeStatus Decode3RInstruction(MCInst &Inst, unsigned Insn,
                                        uint64_t Address,
                                        const MCDisassembler *Decoder) { … }

static DecodeStatus Decode3RImmInstruction(MCInst &Inst, unsigned Insn,
                                           uint64_t Address,
                                           const MCDisassembler *Decoder) { … }

static DecodeStatus Decode2RUSInstruction(MCInst &Inst, unsigned Insn,
                                          uint64_t Address,
                                          const MCDisassembler *Decoder) { … }

static DecodeStatus Decode2RUSBitpInstruction(MCInst &Inst, unsigned Insn,
                                              uint64_t Address,
                                              const MCDisassembler *Decoder) { … }

static DecodeStatus DecodeL3RInstruction(MCInst &Inst, unsigned Insn,
                                         uint64_t Address,
                                         const MCDisassembler *Decoder) { … }

static DecodeStatus DecodeL3RSrcDstInstruction(MCInst &Inst, unsigned Insn,
                                               uint64_t Address,
                                               const MCDisassembler *Decoder) { … }

static DecodeStatus DecodeL2RUSInstruction(MCInst &Inst, unsigned Insn,
                                           uint64_t Address,
                                           const MCDisassembler *Decoder) { … }

static DecodeStatus DecodeL2RUSBitpInstruction(MCInst &Inst, unsigned Insn,
                                               uint64_t Address,
                                               const MCDisassembler *Decoder) { … }

static DecodeStatus DecodeL6RInstruction(MCInst &Inst, unsigned Insn,
                                         uint64_t Address,
                                         const MCDisassembler *Decoder) { … }

static DecodeStatus DecodeL5RInstructionFail(MCInst &Inst, unsigned Insn,
                                             uint64_t Address,
                                             const MCDisassembler *Decoder) { … }

static DecodeStatus DecodeL5RInstruction(MCInst &Inst, unsigned Insn,
                                         uint64_t Address,
                                         const MCDisassembler *Decoder) { … }

static DecodeStatus DecodeL4RSrcDstInstruction(MCInst &Inst, unsigned Insn,
                                               uint64_t Address,
                                               const MCDisassembler *Decoder) { … }

static DecodeStatus
DecodeL4RSrcDstSrcDstInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
                                 const MCDisassembler *Decoder) { … }

MCDisassembler::DecodeStatus
XCoreDisassembler::getInstruction(MCInst &instr, uint64_t &Size,
                                  ArrayRef<uint8_t> Bytes, uint64_t Address,
                                  raw_ostream &cStream) const { … }

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

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