SoftwareBypasser.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:
 
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/**
 * @file SoftwareBypasser.hh
 *
 * Declaration of SoftwareBypasser interface.
 *
 * @author Pekka Jääskeläinen 2007 (pjaaskel-no.spam-cs.tut.fi)
 * @note rating: red
 */
 
#ifndef TTA_SOFTWARE_BYPASSER_HH
#define TTA_SOFTWARE_BYPASSER_HH
 
#include <set>
 
class MoveNodeGroup;
class DataDependenceGraph;
class ResourceManager;
class MoveNodeSelector;
class MoveNode;
 
namespace TTAProgram {
    class Move;
}
 
/**
 * Classes that implement this interface are able to software bypass
 * moves.
 */
class SoftwareBypasser {
public:
    SoftwareBypasser();
    virtual ~SoftwareBypasser();
 
    virtual int bypass(
        MoveNodeGroup& candidates,
        DataDependenceGraph& ddg,
        ResourceManager& rm, bool bypassTrigger) = 0;
 
    virtual int bypassNode(
        MoveNode& moveNode,
        int& lastOperandCycle,
        DataDependenceGraph& ddg,
        ResourceManager& rm) = 0;
 
    virtual void removeBypass(
        MoveNodeGroup& candidates,
        DataDependenceGraph& ddg,
        ResourceManager& rm) = 0;
 
    virtual void removeBypass(
        MoveNode& moveNode,
        DataDependenceGraph& ddg,
        ResourceManager& rm, bool restoreSource=true) = 0;
 
    virtual int removeDeadResults(
        MoveNodeGroup& candidates,
        DataDependenceGraph& ddg,
        ResourceManager& rm,
        std::set<std::pair<TTAProgram::Move*, int> >& removedMoves) = 0;
 
    virtual void setSelector(MoveNodeSelector* selector);
 
    virtual void clearCaches(DataDependenceGraph& ddg, 
                             bool removeDeadResults) = 0;
 
    int bypassCount() { return bypassCount_; }
    int deadResultCount() { return deadResultCount_; }
protected:
    int bypassCount_;
    int deadResultCount_;
    
};
 
#endif