parser.h

浙江大学的悟空嵌入式系统模拟器

/**
 *  Copyright (c) 2005 Zhejiang University, P.R.China
 *
 *  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 2 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, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */ 

//=============================================================================
/**
 *  \class       PPC_Parser
 *
 *  \brief       Parser to parse ppc instructions
 *
 *  \author      Chenfeng Zhou <[e-mail]>
 *
 *  Created    : <2005-02-09 23:24:33 by Cheney Chow>
 *  Last update: <2005-02-11 23:33:23 by Cheney Chow>
 *
 *  $Id: Parser.h,v 1.1 2005/06/16 06:01:50 qilj Exp $
 */
//=============================================================================

#ifndef _PPC_PARSER_H_
#define _PPC_PARSER_H_

#include "Types.h"                               
    
namespace PPC
{
    /**
     * @class   PPC_Parser
     * @brief   Base Parser class
     */
     
    class PPC_Parser
    {
    public:
        typedef
        enum {D_SIMM, D_UIMM,
              X} Parse_Type;

    protected:
        PPC_Parser () {}
        virtual ~PPC_Parser () {}
    };

    /**
     * @class   D_Form_Parser
     * @brief   Parse D Form instructions
     */
     
    class D_Form_Parser : public PPC_Parser
    {
    public:
        virtual ~D_Form_Parser () {}

    public:
        /// Signed immediate
        static void parse_simm (PPC_Instr_T,
                                PPC_s32 &D, PPC_s32 &A, PPC_u32 &SImm);

        /// Unsigned immediate
        static void parse_uimm (PPC_Instr_T,
                                PPC_s32 &D, PPC_s32 &A, PPC_u32 &UImm);

		/// Shifted immediate
		static void parse_shift16 (PPC_Instr_T,
								PPC_s32 &D, PPC_s32 &A, PPC_u32 &Imm16);
    };

    /**
     * @class   I_Form_Parser
     * @brief   Parse I Form instructions
     */
    class I_Form_Parser : public PPC_Parser
    {
    public:
        virtual ~I_Form_Parser () {}

        static void parse (PPC_Instr_T, PPC_u32 &LI);
    };

    /**
     * @class   B_Form_Parser
     * @brief   Parse B Form instructions
     */
    class B_Form_Parser : public PPC_Parser
    {
    public:
        virtual ~B_Form_Parser () {}

        static void parse (PPC_Instr_T,
                           PPC_u32 &BO, PPC_u32 &BD, PPC_u32 &BI);
    };

    /**
     * @class   A_Form_Parser
     * @brief   Parse A Form instructions
     */
    class A_Form_Parser : public PPC_Parser
    {
    public:
        virtual ~A_Form_Parser () {}

        static void parse (PPC_Instr_T,
                           PPC_s32 &D, PPC_s32 &A, PPC_s32 &B, PPC_s32 &C);
    };

    /**
     * @class   X_Form_Parser
     * @brief   Parse X Form instructions
     */
    class X_Form_Parser : public PPC_Parser
    {
    public:
        virtual ~X_Form_Parser () {}

        static void parse_x (PPC_Instr_T,
                             PPC_s32 &S, PPC_s32 &A, PPC_s32 &B);

        static void parse_xfx (PPC_Instr_T,
                               PPC_s32 &S, PPC_u32 &crm);

        static void parse_xo (PPC_Instr_T,
                              PPC_s32 &D, PPC_s32 &A, PPC_s32 &B);

        static void parse_xl (PPC_Instr_T,
                              PPC_u32 &BO, PPC_u32 &BI, PPC_u32 &BD);

        static void parse_xfl (PPC_Instr_T,
                               PPC_s32 &B, PPC_u32 &fm);
    };

	class M_Form_Parser : public PPC_Parser
	{
	public:
		virtual ~M_Form_Parser () {}

		static void parse (PPC_Instr_T,
						   PPC_s32 &S, PPC_s32 &A, PPC_s32 &SH, PPC_s32 &MB, PPC_s32 &ME);
	};

} // namespace PPC


#endif  // _PPC_PARSER_H_