instruction.h

// Copyright (c) 2021-2023, David H. Hovemeyer <david.hovemeyer@gmail.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
// OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
 
#ifndef INSTRUCTION_H
#define INSTRUCTION_H
 
#include <string>
#include "symtab.h"
#include "operand.h"
 
class Instruction {
private:
  int m_opcode;
  unsigned m_num_operands;
  Operand m_operands[3];
  std::string m_comment;
  Symbol *m_symbol;
 
public:
  Instruction(int opcode);
 
  Instruction(int opcode, const Operand &op1);
 
  Instruction(int opcode, const Operand &op1, const Operand &op2);
 
  Instruction(int opcode, const Operand &op1, const Operand &op2, const Operand &op3, unsigned num_operands = 3);
 
  ~Instruction();
 
  Instruction *duplicate() const { return new Instruction(*this); }
 
  int get_opcode() const;
 
  unsigned get_num_operands() const;
 
  const Operand &get_operand(unsigned index) const;
 
  void set_operand(unsigned index, const Operand &operand);
 
  Operand get_last_operand() const;
 
  void set_comment(const std::string &comment) { m_comment = comment; }
 
  bool has_comment() const { return !m_comment.empty(); }
 
  const std::string &get_comment() const { return m_comment; }
 
  void set_symbol(Symbol *sym) { m_symbol = sym; }
 
  Symbol *get_symbol() const { return m_symbol; }
};
 
#endif // INSTRUCTION_H