#include <multiperspective_perceptron_tage.hh>

Inheritance diagram for gem5::branch_prediction::MPP_StatisticalCorrector:

Classes
struct	BranchInfo
struct	MPP_SCThreadHistory

Public Member Functions
	MPP_StatisticalCorrector (const MPP_StatisticalCorrectorParams &p)
void	initBias () override
unsigned	getIndBias (Addr branch_pc, StatisticalCorrector::BranchInfo *bi, bool bias) const override
unsigned	getIndBiasSK (Addr branch_pc, StatisticalCorrector::BranchInfo *bi) const override
unsigned	getIndBiasBank (Addr branch_pc, StatisticalCorrector::BranchInfo *bi, int hitBank, int altBank) const override
unsigned	getIndUpd (Addr branch_pc) const override
int	gIndexLogsSubstr (int nbr, int i) override
bool	scPredict (ThreadID tid, Addr branch_pc, bool cond_branch, StatisticalCorrector::BranchInfo *bi, bool prev_pred_taken, bool bias_bit, bool use_conf_ctr, int8_t conf_ctr, unsigned conf_bits, int hitBank, int altBank, int init_lsum) override
void	condBranchUpdate (ThreadID tid, Addr branch_pc, bool taken, StatisticalCorrector::BranchInfo *bi, Addr target, bool b, int hitBank, int altBank) override
virtual void	getBiasLSUM (Addr branch_pc, StatisticalCorrector::BranchInfo *bi, int &lsum) const =0
void	gUpdate (Addr branch_pc, bool taken, int64_t hist, std::vector< int > &length, std::vector< int8_t > tab, int nbr, int logs, std::vector< int8_t > &w, StatisticalCorrector::BranchInfo bi) override
Public Member Functions inherited from gem5::branch_prediction::StatisticalCorrector
	StatisticalCorrector (const StatisticalCorrectorParams &p)
virtual BranchInfo *	makeBranchInfo ()
virtual SCThreadHistory *	makeThreadHistory ()
unsigned	getIndUpds (Addr branch_pc) const
virtual int	gPredictions (ThreadID tid, Addr branch_pc, BranchInfo *bi, int &lsum)=0
int	calcBias (Addr branch_pc, BranchInfo *bi, bool bias_bit, bool use_conf_ctr, int8_t conf_ctr, unsigned conf_bits, int hitBank, int altBank)
int64_t	gIndex (Addr branch_pc, int64_t bhist, int logs, int nbr, int i)
int	gPredict (Addr branch_pc, int64_t hist, std::vector< int > &length, std::vector< int8_t > *tab, int nbr, int logs, std::vector< int8_t > &w)
void	initGEHLTable (unsigned numLenghts, std::vector< int > lengths, std::vector< int8_t > *&table, unsigned logNumEntries, std::vector< int8_t > &w, int8_t wInitValue)
virtual void	scHistoryUpdate (Addr branch_pc, const StaticInstPtr &inst, bool taken, Addr target, int64_t phist)
void	updateHistories (Addr branch_pc, bool speculative, const StaticInstPtr &inst, bool taken, BranchInfo *bi, Addr target, int64_t phist)
virtual void	scRecordHistState (Addr branch_pc, BranchInfo *bi)
virtual bool	scRestoreHistState (BranchInfo *bi)
virtual void	gUpdates (ThreadID tid, Addr pc, bool taken, BranchInfo *bi)=0
void	init () override
	init() is called after all C++ SimObjects have been created and all ports are connected.
void	updateStats (bool taken, BranchInfo *bi)
virtual size_t	getSizeInBits () const
Public Member Functions inherited from gem5::SimObject
const Params &	params () const
	SimObject (const Params &p)
virtual	~SimObject ()
virtual void	loadState (CheckpointIn &cp)
	loadState() is called on each SimObject when restoring from a checkpoint.
virtual void	initState ()
	initState() is called on each SimObject when not restoring from a checkpoint.
virtual void	regProbePoints ()
	Register probe points for this object.
virtual void	regProbeListeners ()
	Register probe listeners for this object.
ProbeManager *	getProbeManager ()
	Get the probe manager for this object.
virtual Port &	getPort (const std::string &if_name, PortID idx=InvalidPortID)
	Get a port with a given name and index.
virtual void	startup ()
	startup() is the final initialization call before simulation.
DrainState	drain () override
	Provide a default implementation of the drain interface for objects that don't need draining.
virtual void	memWriteback ()
	Write back dirty buffers to memory using functional writes.
virtual void	memInvalidate ()
	Invalidate the contents of memory buffers.
void	serialize (CheckpointOut &cp) const override
	Serialize an object.
void	unserialize (CheckpointIn &cp) override
	Unserialize an object.
Public Member Functions inherited from gem5::EventManager
EventQueue *	eventQueue () 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.
void	setCurTick (Tick newVal)
	EventManager (EventManager &em)
	Event manger manages events in the event queue.
	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.
void	serializeSection (CheckpointOut &cp, const std::string &name) const
void	unserializeSection (CheckpointIn &cp, const char *name)
	Unserialize an a child object.
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.
virtual void	notifyFork ()
	Notify a child process of a fork.
Public Member Functions inherited from gem5::statistics::Group
	Group (Group parent, const char name=nullptr)
	Construct a new statistics group.
virtual	~Group ()
virtual void	regStats ()
	Callback to set stat parameters.
virtual void	resetStats ()
	Callback to reset stats.
virtual void	preDumpStats ()
	Callback before stats are dumped.
void	addStat (statistics::Info *info)
	Register a stat with this group.
const std::map< std::string, Group * > &	getStatGroups () const
	Get all child groups associated with this object.
const std::vector< Info * > &	getStats () const
	Get all stats associated with this object.
void	addStatGroup (const char name, Group block)
	Add a stat block as a child of this block.
const Info *	resolveStat (std::string name) const
	Resolve a stat by its name within this group.
void	mergeStatGroup (Group *block)
	Merge the contents (stats & children) of a block to this block.
	Group ()=delete
	Group (const Group &)=delete
Group &	operator= (const Group &)=delete
Public Member Functions inherited from gem5::Named
	Named (std::string_view name_)
virtual	~Named ()=default
virtual std::string	name () const

Protected Attributes
int8_t	thirdH
const unsigned	pnb
const unsigned	logPnb
std::vector< int >	pm
std::vector< int8_t > *	pgehl
std::vector< int8_t >	wp
const unsigned	gnb
const unsigned	logGnb
std::vector< int >	gm
std::vector< int8_t > *	ggehl
std::vector< int8_t >	wg
Protected Attributes inherited from gem5::branch_prediction::StatisticalCorrector
SCThreadHistory *	scHistory
const unsigned	logBias
const unsigned	logSizeUp
const unsigned	logSizeUps
const unsigned	numEntriesFirstLocalHistories
const unsigned	bwnb
const unsigned	logBwnb
std::vector< int >	bwm
std::vector< int8_t > *	bwgehl
std::vector< int8_t >	wbw
const unsigned	lnb
const unsigned	logLnb
std::vector< int >	lm
std::vector< int8_t > *	lgehl
std::vector< int8_t >	wl
const unsigned	inb
const unsigned	logInb
std::vector< int >	im
std::vector< int8_t > *	igehl
std::vector< int8_t >	wi
std::vector< int8_t >	bias
std::vector< int8_t >	biasSK
std::vector< int8_t >	biasBank
std::vector< int8_t >	wb
int	updateThreshold
std::vector< int >	pUpdateThreshold
const unsigned	chooserConfWidth
const unsigned	updateThresholdWidth
const unsigned	pUpdateThresholdWidth
const unsigned	extraWeightsWidth
const unsigned	scCountersWidth
const unsigned	instShiftAmt
const bool	speculativeHistUpdate
int8_t	firstH
int8_t	secondH
gem5::branch_prediction::StatisticalCorrector::StatisticalCorrectorStats	stats
Protected Attributes inherited from gem5::SimObject
const SimObjectParams &	_params
	Cached copy of the object parameters.
Protected Attributes inherited from gem5::EventManager
EventQueue *	eventq
	A pointer to this object's event queue.

Additional Inherited Members
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.
static SimObject *	find (const char *name)
	Find the SimObject with the given name and return a pointer to it.
static void	setSimObjectResolver (SimObjectResolver *resolver)
	There is a single object name resolver, and it is only set when simulation is restoring from checkpoints.
static SimObjectResolver *	getSimObjectResolver ()
	There is a single object name resolver, and it is only set when simulation is restoring from checkpoints.
Static Public Member Functions inherited from gem5::Serializable
static const std::string &	currentSection ()
	Gets the fully-qualified name of the active section.
static void	generateCheckpointOut (const std::string &cpt_dir, std::ofstream &outstream)
	Generate a checkpoint file so that the serialization can be routed to it.
Protected Member Functions inherited from gem5::branch_prediction::StatisticalCorrector
template<typename T>
void	ctrUpdate (T &ctr, bool taken, int nbits)
Protected Member Functions inherited from gem5::Drainable
	Drainable ()
virtual	~Drainable ()
virtual void	drainResume ()
	Resume execution after a successful drain.
void	signalDrainDone () const
	Signal that an object is drained.
Static Protected Attributes inherited from gem5::branch_prediction::StatisticalCorrector
static const int	MaxOrdinalHistories = 4

Detailed Description

Definition at line 117 of file multiperspective_perceptron_tage.hh.

Constructor & Destructor Documentation

◆ MPP_StatisticalCorrector()

gem5::branch_prediction::MPP_StatisticalCorrector::MPP_StatisticalCorrector ( const MPP_StatisticalCorrectorParams & p )

Definition at line 264 of file multiperspective_perceptron_tage.cc.

References ggehl, gm, gnb, gem5::branch_prediction::StatisticalCorrector::initGEHLTable(), logGnb, logPnb, gem5::MipsISA::p, pgehl, pm, pnb, gem5::branch_prediction::StatisticalCorrector::StatisticalCorrector(), thirdH, wg, gem5::branch_prediction::StatisticalCorrector::wl, and wp.

Referenced by gem5::branch_prediction::MPP_StatisticalCorrector_64KB::MPP_StatisticalCorrector_64KB(), and gem5::branch_prediction::MPP_StatisticalCorrector_8KB::MPP_StatisticalCorrector_8KB().

Member Function Documentation

◆ condBranchUpdate()

void gem5::branch_prediction::MPP_StatisticalCorrector::condBranchUpdate	(	ThreadID	tid,
		Addr	branch_pc,
		bool	taken,
		StatisticalCorrector::BranchInfo *	bi,
		Addr	target,
		bool	b,
		int	hitBank,
		int	altBank )

overridevirtual

Reimplemented from gem5::branch_prediction::StatisticalCorrector.

Definition at line 551 of file multiperspective_perceptron_tage.cc.

◆ getBiasLSUM()

virtual void gem5::branch_prediction::MPP_StatisticalCorrector::getBiasLSUM	(	Addr	branch_pc,
		StatisticalCorrector::BranchInfo *	bi,
		int &	lsum ) const

pure virtual

Implemented in gem5::branch_prediction::MPP_StatisticalCorrector_64KB, and gem5::branch_prediction::MPP_StatisticalCorrector_8KB.

References gem5::PowerISA::bi, and gem5::MipsISA::w.

Referenced by scPredict().

◆ getIndBias()

unsigned gem5::branch_prediction::MPP_StatisticalCorrector::getIndBias	(	Addr	branch_pc,
		StatisticalCorrector::BranchInfo *	bi,
		bool	bias ) const

overridevirtual

Reimplemented from gem5::branch_prediction::StatisticalCorrector.

Definition at line 292 of file multiperspective_perceptron_tage.cc.

References gem5::PowerISA::bi, gem5::branch_prediction::StatisticalCorrector::bias, and gem5::branch_prediction::StatisticalCorrector::logBias.

Referenced by condBranchUpdate(), gem5::branch_prediction::MPP_StatisticalCorrector_64KB::getBiasLSUM(), and gem5::branch_prediction::MPP_StatisticalCorrector_8KB::getBiasLSUM().

◆ getIndBiasBank()

unsigned gem5::branch_prediction::MPP_StatisticalCorrector::getIndBiasBank	(	Addr	branch_pc,
		StatisticalCorrector::BranchInfo *	bi,
		int	hitBank,
		int	altBank ) const

overridevirtual

Implements gem5::branch_prediction::StatisticalCorrector.

Definition at line 308 of file multiperspective_perceptron_tage.cc.

References gem5::PowerISA::bi.

◆ getIndBiasSK()

unsigned gem5::branch_prediction::MPP_StatisticalCorrector::getIndBiasSK	(	Addr	branch_pc,
		StatisticalCorrector::BranchInfo *	bi ) const

overridevirtual

Reimplemented from gem5::branch_prediction::StatisticalCorrector.

Definition at line 300 of file multiperspective_perceptron_tage.cc.

References gem5::PowerISA::bi, and gem5::branch_prediction::StatisticalCorrector::logBias.

Referenced by condBranchUpdate(), gem5::branch_prediction::MPP_StatisticalCorrector_64KB::getBiasLSUM(), and gem5::branch_prediction::MPP_StatisticalCorrector_8KB::getBiasLSUM().

◆ getIndUpd()

unsigned gem5::branch_prediction::MPP_StatisticalCorrector::getIndUpd ( Addr branch_pc ) const

overridevirtual

Reimplemented from gem5::branch_prediction::StatisticalCorrector.

Definition at line 321 of file multiperspective_perceptron_tage.cc.

References gem5::branch_prediction::StatisticalCorrector::logSizeUp.

Referenced by condBranchUpdate(), gem5::branch_prediction::MPP_StatisticalCorrector_64KB::gPredictions(), and gem5::branch_prediction::MPP_StatisticalCorrector_8KB::gPredictions().

◆ gIndexLogsSubstr()

int gem5::branch_prediction::MPP_StatisticalCorrector::gIndexLogsSubstr	(	int	nbr,
		int	i )

overridevirtual

Implements gem5::branch_prediction::StatisticalCorrector.

Definition at line 315 of file multiperspective_perceptron_tage.cc.

References gem5::ArmISA::i.

◆ gUpdate()

void gem5::branch_prediction::MPP_StatisticalCorrector::gUpdate	(	Addr	branch_pc,
		bool	taken,
		int64_t	hist,
		std::vector< int > &	length,
		std::vector< int8_t > *	tab,
		int	nbr,
		int	logs,
		std::vector< int8_t > &	w,
		StatisticalCorrector::BranchInfo *	bi )

overridevirtual

Reimplemented from gem5::branch_prediction::StatisticalCorrector.

Definition at line 327 of file multiperspective_perceptron_tage.cc.

References gem5::PowerISA::bi, gem5::branch_prediction::StatisticalCorrector::ctrUpdate(), gem5::branch_prediction::StatisticalCorrector::gIndex(), gem5::ArmISA::i, gem5::MipsISA::index, gem5::branch_prediction::StatisticalCorrector::scCountersWidth, and gem5::MipsISA::w.

Referenced by gem5::branch_prediction::MPP_StatisticalCorrector_64KB::gUpdates(), and gem5::branch_prediction::MPP_StatisticalCorrector_8KB::gUpdates().

◆ initBias()

void gem5::branch_prediction::MPP_StatisticalCorrector::initBias ( )

overridevirtual

Reimplemented from gem5::branch_prediction::StatisticalCorrector.

Definition at line 278 of file multiperspective_perceptron_tage.cc.

References gem5::branch_prediction::StatisticalCorrector::bias, gem5::branch_prediction::StatisticalCorrector::biasSK, and gem5::branch_prediction::StatisticalCorrector::logBias.

◆ scPredict()

bool gem5::branch_prediction::MPP_StatisticalCorrector::scPredict	(	ThreadID	tid,
		Addr	branch_pc,
		bool	cond_branch,
		StatisticalCorrector::BranchInfo *	bi,
		bool	prev_pred_taken,
		bool	bias_bit,
		bool	use_conf_ctr,
		int8_t	conf_ctr,
		unsigned	conf_bits,
		int	hitBank,
		int	altBank,
		int	init_lsum )