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Instruction CRC

Name:

 Instruction

Comment:

 The following class defines an instruction, represented in both
  • undecoded binary form
  • decoded to identify
  • operation to do
  • registers to act on
  • any immediate operand value

    • Collaborators:

    Responsibilities: 

    class Instruction {
  public:
    void Decode();      // decode the binary representation of the instruction

    unsigned int value; // binary representation of the instruction

    char opCode;     // Type of instruction.  This is NOT the same as the
                     // opcode field from the instruction: see defs in mips.h
    char rs, rt, rd; // Three registers from instruction.
    int extra;       // Immediate or target or shamt field or offset.
                     // Immediates are sign-extended.
};