func_unit.hh

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 * Copyright (c) 2013-2014 ARM Limited
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 *
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 * not be construed as granting a license to any other intellectual
 * property including but not limited to intellectual property relating
 * to a hardware implementation of the functionality of the software
 * licensed hereunder.  You may use the software subject to the license
 * terms below provided that you ensure that this notice is replicated
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#ifndef __CPU_MINOR_FUNC_UNIT_HH__
#define __CPU_MINOR_FUNC_UNIT_HH__
 
#include <cstdint>
#include <ostream>
#include <string>
#include <vector>
 
#include "base/types.hh"
#include "cpu/func_unit.hh"
#include "cpu/minor/buffers.hh"
#include "cpu/minor/dyn_inst.hh"
#include "cpu/timing_expr.hh"
#include "params/MinorFU.hh"
#include "params/MinorFUPool.hh"
#include "params/MinorOpClass.hh"
#include "params/MinorOpClassSet.hh"
#include "sim/clocked_object.hh"
#include "sim/sim_object.hh"
 
namespace gem5
{

class MinorOpClass : public SimObject
{
  public:
    OpClass opClass;
 
  public:
    MinorOpClass(const MinorOpClassParams &params) :
        SimObject(params),
        opClass(params.opClass)
    { }
};

class MinorOpClassSet : public SimObject
{
  public:
    std::vector<MinorOpClass *> opClasses;

    std::vector<bool> capabilityList;
 
  public:
    MinorOpClassSet(const MinorOpClassSetParams &params);
 
  public:
    bool provides(OpClass op_class) { return capabilityList[op_class]; }
};

class MinorFUTiming: public SimObject
{
  public:
    uint64_t mask;
    uint64_t match;

    std::string description;

    bool suppress;

    Cycles extraCommitLat;
    TimingExpr *extraCommitLatExpr;

    Cycles extraAssumedLat;

    std::vector<Cycles> srcRegsRelativeLats;

    MinorOpClassSet *opClasses;
 
  public:
    MinorFUTiming(const MinorFUTimingParams &params);
 
  public:
    bool provides(OpClass op_class) { return opClasses->provides(op_class); }
};

class MinorFU : public SimObject
{
  public:
    MinorOpClassSet *opClasses;

    Cycles opLat;

    Cycles issueLat;

    std::vector<unsigned int> cantForwardFromFUIndices;

    std::vector<MinorFUTiming *> timings;
 
  public:
    MinorFU(const MinorFUParams &params) :
        SimObject(params),
        opClasses(params.opClasses),
        opLat(params.opLat),
        issueLat(params.issueLat),
        cantForwardFromFUIndices(params.cantForwardFromFUIndices),
        timings(params.timings)
    { }
};

class MinorFUPool : public SimObject
{
  public:
    std::vector<MinorFU *> funcUnits;
 
  public:
    MinorFUPool(const MinorFUPoolParams &params) :
        SimObject(params),
        funcUnits(params.funcUnits)
    { }
};
 
namespace minor
{

class QueuedInst
{
  public:
    MinorDynInstPtr inst;
 
  public:
    QueuedInst(MinorDynInstPtr inst_ = MinorDynInst::bubble()) :
        inst(inst_)
    { }
 
  public:
    void reportData(std::ostream &os) const;
    bool isBubble() const { return inst->isBubble(); }
 
    static QueuedInst bubble()
    { return QueuedInst(MinorDynInst::bubble()); }
};

typedef SelfStallingPipeline<QueuedInst,
    ReportTraitsAdaptor<QueuedInst> > FUPipelineBase;

class FUPipeline : public FUPipelineBase, public FuncUnit
{
  public:
    const MinorFU &description;

    ClockedObject &timeSource;

    std::bitset<Num_OpClasses> capabilityList;

    std::vector<bool> cantForwardFromFUIndices;
 
  public:
    Cycles nextInsertCycle;
 
  public:
    FUPipeline(const std::string &name, const MinorFU &description_,
        ClockedObject &timeSource_);
 
  public:
    Cycles cyclesBeforeInsert();

    bool canInsert() const;

    MinorFUTiming *findTiming(const StaticInstPtr &inst);

    void advance();
};
 
} // namespace minor
} // namespace gem5
 
#endif /* __CPU_MINOR_FUNC_UNIT_HH__ */