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/*!

  AEMB INSTRUCTION SET SIMULATOR

  Copyright (C) 2009 Shawn Tan 

  This program is free software: you can redistribute it and/or modify

  it under the terms of the GNU General Public License as published by

  the Free Software Foundation, either version 3 of the License, or

  (at your option) any later version.

  This program is distributed in the hope that it will be useful, but

  WITHOUT ANY WARRANTY; without even the implied warranty of

  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  General Public License for more details.

  You should have received a copy of the GNU General Public License

  along with this program.  If not, see

  .

*/

#ifndef _AEMBREGISTERGP_H_

#define _AEMBREGISTERGP_H_

#include 

using std::vector;

namespace aemb {

/**

 * List of special function registers

 */

typedef enum

{

        SFR_PC = 0,

        SFR_MSR = 1,

        SFR_EAR = 3,

        SFR_ESR = 5,

} SpecialRegs;

/**

   Behavioral class for the general purpose register file that can

   only be read from and written to. It has internal mechanisms to

   check for data hazards.

*/

class RegisterFile

{

        vector regfile; ///< internal general purpose register file

        int rsfr;

public:

        void reset();

        /**

         * Put a value into a register.

         * @param gpr Register number [0:31].

         * @param data Register data to write

         */

        void setRegister(const int gpr, const int data);

        /**

         * Get a value from a register.

         * @param gpr Register number [0:31].

         * @return Value of the register.

         */

        int getRegister(const int gpr);

        /**

         * Get the value of a special register.

         * @param sfr Special register number

         * @return Special register value

         */

        int getSpecial(const int sfr);

        /**

         * Set the value of a special register

         * @param sfr Special register number

         * @param imm32 Special register value

         */

        void setSpecial(const int sfr, const int imm32);

        int clrSpecial(const int imm14);

        int setSpecial(const int imm14);

        RegisterFile();

        ~RegisterFile();

};

}

#endif