gem5  v22.1.0.0
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gem5::branch_prediction::SimpleIndirectPredictor Class Reference

#include <simple_indirect.hh>

Inheritance diagram for gem5::branch_prediction::SimpleIndirectPredictor:
gem5::branch_prediction::IndirectPredictor gem5::SimObject gem5::EventManager gem5::Serializable gem5::Drainable gem5::statistics::Group gem5::Named

Classes

struct  HistoryEntry
 
struct  IPredEntry
 
struct  ThreadInfo
 

Public Member Functions

 SimpleIndirectPredictor (const SimpleIndirectPredictorParams &params)
 
bool lookup (Addr br_addr, PCStateBase &br_target, ThreadID tid)
 
void recordIndirect (Addr br_addr, Addr tgt_addr, InstSeqNum seq_num, ThreadID tid)
 
void commit (InstSeqNum seq_num, ThreadID tid, void *indirect_history)
 
void squash (InstSeqNum seq_num, ThreadID tid)
 
void recordTarget (InstSeqNum seq_num, void *indirect_history, const PCStateBase &target, ThreadID tid)
 
void genIndirectInfo (ThreadID tid, void *&indirect_history)
 
void updateDirectionInfo (ThreadID tid, bool actually_taken)
 
void deleteIndirectInfo (ThreadID tid, void *indirect_history)
 
void changeDirectionPrediction (ThreadID tid, void *indirect_history, bool actually_taken)
 
- Public Member Functions inherited from gem5::branch_prediction::IndirectPredictor
 IndirectPredictor (const Params &params)
 
- Public Member Functions inherited from gem5::SimObject
const Paramsparams () const
 
 SimObject (const Params &p)
 
virtual ~SimObject ()
 
virtual void init ()
 init() is called after all C++ SimObjects have been created and all ports are connected. More...
 
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 gem5::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 gem5::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 gem5::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 gem5::statistics::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 (statistics::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...
 
void mergeStatGroup (Group *block)
 Merge the contents (stats & children) of a block to this block. More...
 
 Group ()=delete
 
 Group (const Group &)=delete
 
Groupoperator= (const Group &)=delete
 
- Public Member Functions inherited from gem5::Named
 Named (const std::string &name_)
 
virtual ~Named ()=default
 
virtual std::string name () const
 

Private Member Functions

Addr getSetIndex (Addr br_addr, unsigned ghr, ThreadID tid)
 
Addr getTag (Addr br_addr)
 

Private Attributes

const bool hashGHR
 
const bool hashTargets
 
const unsigned numSets
 
const unsigned numWays
 
const unsigned tagBits
 
const unsigned pathLength
 
const unsigned instShift
 
const unsigned ghrNumBits
 
const unsigned ghrMask
 
std::vector< std::vector< IPredEntry > > targetCache
 
std::vector< ThreadInfothreadInfo
 

Additional Inherited Members

- Public Types inherited from gem5::branch_prediction::IndirectPredictor
typedef IndirectPredictorParams Params
 
- Public Types inherited from gem5::SimObject
typedef SimObjectParams Params
 
- Static Public Member Functions inherited from gem5::SimObject
static void serializeAll (const std::string &cpt_dir)
 Create a checkpoint by serializing 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 void setSimObjectResolver (SimObjectResolver *resolver)
 There is a single object name resolver, and it is only set when simulation is restoring from checkpoints. More...
 
static SimObjectResolvergetSimObjectResolver ()
 There is a single object name resolver, and it is only set when simulation is restoring from checkpoints. More...
 
- Static Public Member Functions inherited from gem5::Serializable
static const std::string & currentSection ()
 Gets the fully-qualified name of the active section. More...
 
static void generateCheckpointOut (const std::string &cpt_dir, std::ofstream &outstream)
 Generate a checkpoint file so that the serialization can be routed to it. More...
 
- Protected Member Functions inherited from gem5::Drainable
 Drainable ()
 
virtual ~Drainable ()
 
virtual void drainResume ()
 Resume execution after a successful drain. More...
 
void signalDrainDone () const
 Signal that an object is drained. More...
 
- Protected Attributes inherited from gem5::SimObject
const SimObjectParams & _params
 Cached copy of the object parameters. More...
 
- Protected Attributes inherited from gem5::EventManager
EventQueueeventq
 A pointer to this object's event queue. More...
 

Detailed Description

Definition at line 44 of file simple_indirect.hh.

Constructor & Destructor Documentation

◆ SimpleIndirectPredictor()

gem5::branch_prediction::SimpleIndirectPredictor::SimpleIndirectPredictor ( const SimpleIndirectPredictorParams &  params)

Member Function Documentation

◆ changeDirectionPrediction()

void gem5::branch_prediction::SimpleIndirectPredictor::changeDirectionPrediction ( ThreadID  tid,
void *  indirect_history,
bool  actually_taken 
)
virtual

Implements gem5::branch_prediction::IndirectPredictor.

Definition at line 87 of file simple_indirect.cc.

References ghrMask, and threadInfo.

◆ commit()

void gem5::branch_prediction::SimpleIndirectPredictor::commit ( InstSeqNum  seq_num,
ThreadID  tid,
void *  indirect_history 
)
virtual

◆ deleteIndirectInfo()

void gem5::branch_prediction::SimpleIndirectPredictor::deleteIndirectInfo ( ThreadID  tid,
void *  indirect_history 
)
virtual

Implements gem5::branch_prediction::IndirectPredictor.

Definition at line 171 of file simple_indirect.cc.

References threadInfo.

◆ genIndirectInfo()

void gem5::branch_prediction::SimpleIndirectPredictor::genIndirectInfo ( ThreadID  tid,
void *&  indirect_history 
)
virtual

Implements gem5::branch_prediction::IndirectPredictor.

Definition at line 68 of file simple_indirect.cc.

References threadInfo.

◆ getSetIndex()

Addr gem5::branch_prediction::SimpleIndirectPredictor::getSetIndex ( Addr  br_addr,
unsigned  ghr,
ThreadID  tid 
)
inlineprivate

◆ getTag()

Addr gem5::branch_prediction::SimpleIndirectPredictor::getTag ( Addr  br_addr)
inlineprivate

Definition at line 240 of file simple_indirect.cc.

References instShift, and tagBits.

Referenced by lookup(), and recordTarget().

◆ lookup()

bool gem5::branch_prediction::SimpleIndirectPredictor::lookup ( Addr  br_addr,
PCStateBase br_target,
ThreadID  tid 
)
virtual

◆ recordIndirect()

void gem5::branch_prediction::SimpleIndirectPredictor::recordIndirect ( Addr  br_addr,
Addr  tgt_addr,
InstSeqNum  seq_num,
ThreadID  tid 
)
virtual

Implements gem5::branch_prediction::IndirectPredictor.

Definition at line 120 of file simple_indirect.cc.

References DPRINTF, and threadInfo.

◆ recordTarget()

void gem5::branch_prediction::SimpleIndirectPredictor::recordTarget ( InstSeqNum  seq_num,
void *  indirect_history,
const PCStateBase target,
ThreadID  tid 
)
virtual

◆ squash()

void gem5::branch_prediction::SimpleIndirectPredictor::squash ( InstSeqNum  seq_num,
ThreadID  tid 
)
virtual

◆ updateDirectionInfo()

void gem5::branch_prediction::SimpleIndirectPredictor::updateDirectionInfo ( ThreadID  tid,
bool  actually_taken 
)
virtual

Implements gem5::branch_prediction::IndirectPredictor.

Definition at line 78 of file simple_indirect.cc.

References ghrMask, and threadInfo.

Member Data Documentation

◆ ghrMask

const unsigned gem5::branch_prediction::SimpleIndirectPredictor::ghrMask
private

Definition at line 71 of file simple_indirect.hh.

Referenced by changeDirectionPrediction(), and updateDirectionInfo().

◆ ghrNumBits

const unsigned gem5::branch_prediction::SimpleIndirectPredictor::ghrNumBits
private

Definition at line 70 of file simple_indirect.hh.

Referenced by SimpleIndirectPredictor().

◆ hashGHR

const bool gem5::branch_prediction::SimpleIndirectPredictor::hashGHR
private

Definition at line 63 of file simple_indirect.hh.

Referenced by getSetIndex().

◆ hashTargets

const bool gem5::branch_prediction::SimpleIndirectPredictor::hashTargets
private

Definition at line 64 of file simple_indirect.hh.

Referenced by getSetIndex().

◆ instShift

const unsigned gem5::branch_prediction::SimpleIndirectPredictor::instShift
private

Definition at line 69 of file simple_indirect.hh.

Referenced by getSetIndex(), and getTag().

◆ numSets

const unsigned gem5::branch_prediction::SimpleIndirectPredictor::numSets
private

Definition at line 65 of file simple_indirect.hh.

Referenced by getSetIndex(), lookup(), recordTarget(), and SimpleIndirectPredictor().

◆ numWays

const unsigned gem5::branch_prediction::SimpleIndirectPredictor::numWays
private

Definition at line 66 of file simple_indirect.hh.

Referenced by recordTarget(), and SimpleIndirectPredictor().

◆ pathLength

const unsigned gem5::branch_prediction::SimpleIndirectPredictor::pathLength
private

Definition at line 68 of file simple_indirect.hh.

Referenced by commit(), and getSetIndex().

◆ tagBits

const unsigned gem5::branch_prediction::SimpleIndirectPredictor::tagBits
private

Definition at line 67 of file simple_indirect.hh.

Referenced by getTag().

◆ targetCache

std::vector<std::vector<IPredEntry> > gem5::branch_prediction::SimpleIndirectPredictor::targetCache
private

Definition at line 79 of file simple_indirect.hh.

Referenced by lookup(), recordTarget(), and SimpleIndirectPredictor().

◆ threadInfo

std::vector<ThreadInfo> gem5::branch_prediction::SimpleIndirectPredictor::threadInfo
private

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

Generated on Wed Dec 21 2022 10:23:38 for gem5 by doxygen 1.9.1