fu_pool.hh

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#ifndef __CPU_O3_FU_POOL_HH__
#define __CPU_O3_FU_POOL_HH__
 
#include <array>
#include <bitset>
#include <list>
#include <string>
#include <vector>
 
#include "cpu/op_class.hh"
#include "params/FUPool.hh"
#include "sim/sim_object.hh"
 
namespace gem5
{
 
class FUDesc;
class FuncUnit;
 
namespace o3
{
 
class FUPool : public SimObject
{
  private:
    std::array<Cycles, Num_OpClasses> maxOpLatencies;
    std::array<bool, Num_OpClasses> pipelined;
 
    std::bitset<Num_OpClasses> capabilityList;
 
    std::vector<bool> unitBusy;
 
    std::vector<int> unitsToBeFreed;
 
    class FUIdxQueue
    {
      public:
        FUIdxQueue()
            : idx(0), size(0)
        { }
 
        inline void addFU(int fu_idx);
 
        inline int getFU();
 
      private:
        int idx;
 
        int size;
 
        std::vector<int> funcUnitsIdx;
    };
 
    FUIdxQueue fuPerCapList[Num_OpClasses];
 
    int numFU;
 
    std::vector<FuncUnit *> funcUnits;
 
    typedef std::vector<FuncUnit *>::iterator fuListIterator;
 
  public:
    typedef FUPoolParams Params;
    FUPool(const Params &p);
    ~FUPool();
 
    static constexpr auto NoCapableFU = -2;
    static constexpr auto NoFreeFU = -1;
    int getUnit(OpClass capability);
 
    void freeUnitNextCycle(int fu_idx);
 
    void processFreeUnits();
 
    int size() { return numFU; }
 
    void dump();
 
    Cycles getOpLatency(OpClass capability) {
        return maxOpLatencies[capability];
    }
 
    bool isPipelined(OpClass capability) {
        return pipelined[capability];
    }
 
    bool isDrained() const;
 
    void takeOverFrom() {};
};
 
} // namespace o3
} // namespace gem5
 
#endif // __CPU_O3_FU_POOL_HH__