sparcdecoder.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:       sparcdecoder.h
 * OVERVIEW:   The implementation of the instruction decoder for Sparc.
 *============================================================================*/

/* 
 * $Revision: 1.7 $ // 1.6.6.2
 *
 * 06 Jun 02 - Trent: Created.
 * 04 Dec 02 - Mike: Added dis_RegLhs() and dis_RegRhs()
 */

#ifndef SPARCDECODER
#define SPARCDECODER

class Prog;
class NJMCDecoder;
struct DecodeResult;

class SparcDecoder : public NJMCDecoder
{
public:
    /* Constructor
     */
    SparcDecoder(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);

    /*
     * Indicates whether the instruction at the given address is a restore instruction.
     */
    bool    isRestore(ADDRESS hostPC);
private:
    /*
     * Various functions to decode the operands of an instruction into
     * a SemStr representation.
     */
    Exp*    dis_Eaddr(ADDRESS pc, int size = 0);
    Exp*    dis_RegImm(ADDRESS pc);
    Exp*    dis_RegLhs(unsigned r);
    Exp*    dis_RegRhs(unsigned r);

    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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