// Copyright (c) 2009-2011, Tor M. Aamodt, Inderpreet Singh
// The University of British Columbia
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
// Redistributions in binary form must reproduce the above copyright notice, this
// list of conditions and the following disclaimer in the documentation and/or
// other materials provided with the distribution.
// Neither the name of The University of British Columbia nor the names of its
// contributors may be used to endorse or promote products derived from this
// software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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#include <stdio.h>
#include <stdlib.h>
#include <vector>
#include <set>
#include "assert.h"

#ifndef SCOREBOARD_H_
#define SCOREBOARD_H_

#include "../abstract_hardware_model.h"

class Scoreboard {
public:
    Scoreboard( unsigned sid, unsigned n_warps );

    void reserveRegisters(const warp_inst_t *inst);
    void releaseRegisters(const warp_inst_t *inst);
    void releaseRegister(unsigned wid, unsigned regnum);

    bool checkCollision(unsigned wid, const inst_t *inst) const;
    bool pendingWrites(unsigned wid) const;
    void printContents() const;
    const bool islongop(unsigned warp_id, unsigned regnum);
private:
    void reserveRegister(unsigned wid, unsigned regnum);
    int get_sid() const { return m_sid; }

    unsigned m_sid;

    // keeps track of pending writes to registers
    // indexed by warp id, reg_id => pending write count
    std::vector< std::set<unsigned> > reg_table;
    //Register that depend on a long operation (global, local or tex memory)
    std::vector< std::set<unsigned> > longopregs;
};


#endif /* SCOREBOARD_H_ */