ImmediateEncoding.hh

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/*
    Copyright (c) 2002-2009 Tampere University.
 
    This file is part of TTA-Based Codesign Environment (TCE).
 
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    copy of this software and associated documentation files (the "Software"),
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    Software is furnished to do so, subject to the following conditions:
 
    The above copyright notice and this permission notice shall be included in
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    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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/**
 * @file ImmediateEncoding.hh
 *
 * Declaration of ImmediateEncoding class.
 *
 * @author Lasse Laasonen 2005 (lasse.laasonen-no.spam-tut.fi)
 * @note rating: red
 */
 
#ifndef TTA_IMMEDIATE_ENCODING_HH
#define TTA_IMMEDIATE_ENCODING_HH
 
#include "Encoding.hh"
 
class SourceField;
class ObjectState;
 
/**
 * Represents the encoding for inline immediate within the source field.
 */
class ImmediateEncoding : public Encoding {
public:
    ImmediateEncoding(
        unsigned int encoding, unsigned int extraBits, int immediateWidth,
        SourceField& parent);
    ImmediateEncoding(const ObjectState* state, SourceField& parent);
    virtual ~ImmediateEncoding();
 
    SourceField* parent() const;
    int immediateWidth() const;
    int encodingWidth() const;
    int encodingPosition() const;
    int immediatePosition() const;
 
    virtual int bitPosition() const;
    virtual int width() const;
    virtual ObjectState* saveState() const;
 
    /// ObjectState name for immediate encoding.
    static const std::string OSNAME_IMM_ENCODING;
    /// ObjectState attribute key for the immediate width.
    static const std::string OSKEY_IMM_WIDTH;
 
private:
    int immediateWidth_;
};
 
#endif