gem5  v20.1.0.0
Public Member Functions | List of all members
MPP_LoopPredictor Class Reference

#include <multiperspective_perceptron_tage.hh>

Inheritance diagram for MPP_LoopPredictor:
LoopPredictor SimObject EventManager Serializable Drainable Stats::Group MPP_LoopPredictor_8KB

Public Member Functions

 MPP_LoopPredictor (MPP_LoopPredictorParams *p)
bool calcConf (int index) const override
bool optionalAgeInc () const override
- Public Member Functions inherited from LoopPredictor
int lindex (Addr pc_in, unsigned instShiftAmt) const
 Computes the index used to access the loop predictor. More...
int finallindex (int lindex, int lowPcBits, int way) const
 Computes the index used to access the ltable structures. More...
bool getLoop (Addr pc, BranchInfo *bi, bool speculative, unsigned instShiftAmt) const
 Get a branch prediction from the loop predictor. More...
void loopUpdate (Addr pc, bool Taken, BranchInfo *bi, bool tage_pred)
 Updates the loop predictor. More...
void specLoopUpdate (bool taken, BranchInfo *bi)
 Speculatively updates the loop predictor iteration count (only for useSpeculation). More...
void condBranchUpdate (ThreadID tid, Addr branch_pc, bool taken, bool tage_pred, BranchInfo *bi, unsigned instShiftAmt)
 Update LTAGE for conditional branches. More...
bool loopPredict (ThreadID tid, Addr branch_pc, bool cond_branch, BranchInfo *bi, bool prev_pred_taken, unsigned instShiftAmt)
 Get the loop prediction. More...
void updateStats (bool taken, BranchInfo *bi)
 Update the stats. More...
void squashLoop (BranchInfo *bi)
void squash (ThreadID tid, BranchInfo *bi)
virtual BranchInfomakeBranchInfo ()
int8_t getLoopUseCounter () const
 Gets the value of the loop use counter. More...
void init () override
 Initialize the loop predictor. More...
 LoopPredictor (LoopPredictorParams *p)
size_t getSizeInBits () const
- Public Member Functions inherited from SimObject
const Paramsparams () const
 SimObject (const Params *_params)
virtual ~SimObject ()
virtual const std::string name () const
virtual void loadState (CheckpointIn &cp)
 loadState() is called on each SimObject when restoring from a checkpoint. More...
virtual void initState ()
 initState() is called on each SimObject when not restoring from a checkpoint. More...
virtual void regProbePoints ()
 Register probe points for this object. More...
virtual void regProbeListeners ()
 Register probe listeners for this object. More...
ProbeManagergetProbeManager ()
 Get the probe manager for this object. More...
virtual PortgetPort (const std::string &if_name, PortID idx=InvalidPortID)
 Get a port with a given name and index. More...
virtual void startup ()
 startup() is the final initialization call before simulation. More...
DrainState drain () override
 Provide a default implementation of the drain interface for objects that don't need draining. More...
virtual void memWriteback ()
 Write back dirty buffers to memory using functional writes. More...
virtual void memInvalidate ()
 Invalidate the contents of memory buffers. More...
void serialize (CheckpointOut &cp) const override
 Serialize an object. More...
void unserialize (CheckpointIn &cp) override
 Unserialize an object. More...
- Public Member Functions inherited from EventManager
EventQueueeventQueue () const
void schedule (Event &event, Tick when)
void deschedule (Event &event)
void reschedule (Event &event, Tick when, bool always=false)
void schedule (Event *event, Tick when)
void deschedule (Event *event)
void reschedule (Event *event, Tick when, bool always=false)
void wakeupEventQueue (Tick when=(Tick) -1)
 This function is not needed by the usual gem5 event loop but may be necessary in derived EventQueues which host gem5 on other schedulers. More...
void setCurTick (Tick newVal)
 EventManager (EventManager &em)
 Event manger manages events in the event queue. More...
 EventManager (EventManager *em)
 EventManager (EventQueue *eq)
- Public Member Functions inherited from Serializable
 Serializable ()
virtual ~Serializable ()
void serializeSection (CheckpointOut &cp, const char *name) const
 Serialize an object into a new section. More...
void serializeSection (CheckpointOut &cp, const std::string &name) const
void unserializeSection (CheckpointIn &cp, const char *name)
 Unserialize an a child object. More...
void unserializeSection (CheckpointIn &cp, const std::string &name)
- Public Member Functions inherited from Drainable
DrainState drainState () const
 Return the current drain state of an object. More...
virtual void notifyFork ()
 Notify a child process of a fork. More...
- Public Member Functions inherited from Stats::Group
 Group (Group *parent, const char *name=nullptr)
 Construct a new statistics group. More...
virtual ~Group ()
virtual void regStats ()
 Callback to set stat parameters. More...
virtual void resetStats ()
 Callback to reset stats. More...
virtual void preDumpStats ()
 Callback before stats are dumped. More...
void addStat (Stats::Info *info)
 Register a stat with this group. More...
const std::map< std::string, Group * > & getStatGroups () const
 Get all child groups associated with this object. More...
const std::vector< Info * > & getStats () const
 Get all stats associated with this object. More...
void addStatGroup (const char *name, Group *block)
 Add a stat block as a child of this block. More...
const InforesolveStat (std::string name) const
 Resolve a stat by its name within this group. More...
 Group ()=delete
 Group (const Group &)=delete
Groupoperator= (const Group &)=delete

Additional Inherited Members

- Public Types inherited from SimObject
typedef SimObjectParams Params
- Static Public Member Functions inherited from SimObject
static void serializeAll (CheckpointOut &cp)
 Serialize all SimObjects in the system. More...
static SimObjectfind (const char *name)
 Find the SimObject with the given name and return a pointer to it. More...
- Static Public Member Functions inherited from Serializable
static const std::string & currentSection ()
 Gets the fully-qualified name of the active section. More...
static void serializeAll (const std::string &cpt_dir)
 Serializes all the SimObjects. More...
static void unserializeGlobals (CheckpointIn &cp)
- Protected Member Functions inherited from Drainable
 Drainable ()
virtual ~Drainable ()
virtual void drainResume ()
 Resume execution after a successful drain. More...
void signalDrainDone () const
 Signal that an object is drained. More...
- Static Protected Member Functions inherited from LoopPredictor
static void unsignedCtrUpdate (uint8_t &ctr, bool up, unsigned nbits)
 Updates an unsigned counter based on up/down parameter. More...
static void signedCtrUpdate (int8_t &ctr, bool up, unsigned nbits)
- Protected Attributes inherited from LoopPredictor
const unsigned logSizeLoopPred
const unsigned loopTableAgeBits
const unsigned loopTableConfidenceBits
const unsigned loopTableTagBits
const unsigned loopTableIterBits
const unsigned logLoopTableAssoc
const uint8_t confidenceThreshold
const uint16_t loopTagMask
const uint16_t loopNumIterMask
const int loopSetMask
int8_t loopUseCounter
unsigned withLoopBits
const bool useDirectionBit
const bool useSpeculation
const bool useHashing
const bool restrictAllocation
const unsigned initialLoopIter
const unsigned initialLoopAge
const bool optionalAgeReset
LoopPredictor::LoopPredictorStats stats
- Protected Attributes inherited from SimObject
const SimObjectParams * _params
 Cached copy of the object parameters. More...
- Protected Attributes inherited from EventManager
 A pointer to this object's event queue. More...

Detailed Description

Definition at line 85 of file multiperspective_perceptron_tage.hh.

Constructor & Destructor Documentation

◆ MPP_LoopPredictor()

MPP_LoopPredictor::MPP_LoopPredictor ( MPP_LoopPredictorParams *  p)

Definition at line 87 of file multiperspective_perceptron_tage.hh.

Member Function Documentation

◆ calcConf()

bool MPP_LoopPredictor::calcConf ( int  index) const

◆ optionalAgeInc()

bool MPP_LoopPredictor::optionalAgeInc ( ) const

Reimplemented from LoopPredictor.

Definition at line 259 of file

References Random::random(), and random_mt.

The documentation for this class was generated from the following files:

Generated on Wed Sep 30 2020 14:02:28 for gem5 by doxygen 1.8.17