ppcdecoder.h

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/*
 * Copyright (C) 1996-2001, The University of Queensland
 * Copyright (C) 2001, Sun Microsystems, Inc
 *
 * See the file "LICENSE.TERMS" for information on usage and
 * redistribution of this file, and for a DISCLAIMER OF ALL
 * WARRANTIES.
 *
 */

/*==============================================================================
 * FILE:       ppcdecoder.h
 * OVERVIEW:   The implementation of the instruction decoder for PPC.
 *============================================================================*/

/* 
 * $Revision: 1.4 $ // 1.3.2.1
 *
 * 23 Nov 04 - Jay Sweeney and Alejandro Dubrovsky: Created.
 */

#ifndef PPCDECODER
#define PPCDECODER

class Prog;
class NJMCDecoder;
struct DecodeResult;

class PPCDecoder : public NJMCDecoder
{
public:
    /* Default constructor
     */
                    PPCDecoder(Prog* prog);

    /*
     * Decodes the machine instruction at pc and returns an RTL instance for
     * the instruction.
     */
virtual DecodeResult& decodeInstruction (ADDRESS pc, int delta);

    /*
     * Disassembles the machine instruction at pc and returns the number of
     * bytes disassembled. Assembler output goes to global _assembly
     */
virtual int         decodeAssemblyInstruction (ADDRESS pc, int delta);


private:
        /*
         * Various functions to decode the operands of an instruction into an Exp* representation.
         */
        Exp*        dis_Eaddr(ADDRESS pc, int size = 0);
        Exp*        dis_RegImm(ADDRESS pc);
        Exp*        dis_Reg(unsigned r);
        Exp*        dis_RAmbz(unsigned r);      // Special for rA of certain instructions

        void        unused(int x);
        RTL*        createBranchRtl(ADDRESS pc, std::list<Statement*>* stmts, const char* name);
        bool        isFuncPrologue(ADDRESS hostPC);
        DWord       getDword(ADDRESS lc);

};

#endif

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