#include <simple_indirect.hh>

Inheritance diagram for gem5::branch_prediction::SimpleIndirectPredictor:

Classes
struct	HistoryEntry

struct	IPredEntry

struct	ThreadInfo

Public Member Functions
	SimpleIndirectPredictor (const SimpleIndirectPredictorParams &params)

bool	lookup (Addr br_addr, TheISA::PCState &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 TheISA::PCState &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 Params &	params () 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...

ProbeManager *	getProbeManager ()
	Get the probe manager for this object. More...

virtual Port &	getPort (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
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. 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 Info *	resolveStat (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

Group &	operator= (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< ThreadInfo >	threadInfo

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 SimObject *	find (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 SimObjectResolver *	getSimObjectResolver ()
	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
EventQueue *	eventq
	A pointer to this object's event queue. More...

Detailed Description

Definition at line 45 of file simple_indirect.hh.

Constructor & Destructor Documentation

◆ SimpleIndirectPredictor()

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

Definition at line 40 of file simple_indirect.cc.

References fatal_if, gem5::branch_prediction::SimpleIndirectPredictor::ThreadInfo::ghr, ghrNumBits, gem5::ArmISA::i, gem5::isPowerOf2(), numSets, numWays, panic, gem5::SimObject::params(), targetCache, and threadInfo.

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

Implements gem5::branch_prediction::IndirectPredictor.

Definition at line 127 of file simple_indirect.cc.

References DPRINTF, gem5::branch_prediction::SimpleIndirectPredictor::ThreadInfo::headHistEntry, gem5::branch_prediction::SimpleIndirectPredictor::ThreadInfo::pathHist, pathLength, and threadInfo.

◆ deleteIndirectInfo()

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

virtual

Implements gem5::branch_prediction::IndirectPredictor.

Definition at line 169 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

Definition at line 218 of file simple_indirect.cc.

References gem5::floorLog2(), hashGHR, hashTargets, gem5::ArmISA::i, instShift, numSets, gem5::MipsISA::p, gem5::branch_prediction::SimpleIndirectPredictor::ThreadInfo::pathHist, pathLength, and threadInfo.

Referenced by lookup(), and recordTarget().

◆ getTag()

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

inlineprivate

Definition at line 238 of file simple_indirect.cc.

References instShift, and tagBits.

Referenced by lookup(), and recordTarget().

◆ lookup()

bool gem5::branch_prediction::SimpleIndirectPredictor::lookup	(	Addr	br_addr,
		TheISA::PCState &	br_target,
		ThreadID	tid
	)

virtual

Implements gem5::branch_prediction::IndirectPredictor.

Definition at line 96 of file simple_indirect.cc.

References DPRINTF, getSetIndex(), getTag(), numSets, targetCache, and threadInfo.

◆ 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 118 of file simple_indirect.cc.

References DPRINTF, and threadInfo.

◆ recordTarget()

void gem5::branch_prediction::SimpleIndirectPredictor::recordTarget	(	InstSeqNum	seq_num,
		void *	indirect_history,
		const TheISA::PCState &	target,
		ThreadID	tid
	)

virtual

Implements gem5::branch_prediction::IndirectPredictor.

Definition at line 179 of file simple_indirect.cc.

References DPRINTF, getSetIndex(), getTag(), numSets, numWays, gem5::branch_prediction::SimpleIndirectPredictor::ThreadInfo::pathHist, targetCache, and threadInfo.

◆ squash()

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

virtual

Implements gem5::branch_prediction::IndirectPredictor.

Definition at line 150 of file simple_indirect.cc.

References DPRINTF, gem5::branch_prediction::SimpleIndirectPredictor::ThreadInfo::pathHist, and threadInfo.

◆ 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 72 of file simple_indirect.hh.

Referenced by changeDirectionPrediction(), and updateDirectionInfo().

◆ ghrNumBits

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

private

Definition at line 71 of file simple_indirect.hh.

Referenced by SimpleIndirectPredictor().

◆ hashGHR

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

private

Definition at line 64 of file simple_indirect.hh.

Referenced by getSetIndex().

◆ hashTargets

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

private

Definition at line 65 of file simple_indirect.hh.

Referenced by getSetIndex().

◆ instShift

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

private

Definition at line 70 of file simple_indirect.hh.

Referenced by getSetIndex(), and getTag().

◆ numSets

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

private

Definition at line 66 of file simple_indirect.hh.

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

◆ numWays

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

private

Definition at line 67 of file simple_indirect.hh.

Referenced by recordTarget(), and SimpleIndirectPredictor().

◆ pathLength

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

private

Definition at line 69 of file simple_indirect.hh.

Referenced by commit(), and getSetIndex().

◆ tagBits

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

private

Definition at line 68 of file simple_indirect.hh.

Referenced by getTag().

◆ targetCache

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

private

Definition at line 81 of file simple_indirect.hh.

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

◆ threadInfo

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

private

Definition at line 105 of file simple_indirect.hh.

Referenced by changeDirectionPrediction(), commit(), deleteIndirectInfo(), genIndirectInfo(), getSetIndex(), lookup(), recordIndirect(), recordTarget(), SimpleIndirectPredictor(), squash(), and updateDirectionInfo().

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

cpu/pred/simple_indirect.hh
cpu/pred/simple_indirect.cc

Classes

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ SimpleIndirectPredictor()

Member Function Documentation

◆ changeDirectionPrediction()

◆ commit()

◆ deleteIndirectInfo()

◆ genIndirectInfo()

◆ getSetIndex()

◆ getTag()

◆ lookup()

◆ recordIndirect()

◆ recordTarget()

◆ squash()

◆ updateDirectionInfo()

Member Data Documentation

◆ ghrMask

◆ ghrNumBits

◆ hashGHR

◆ hashTargets

◆ instShift

◆ numSets

◆ numWays

◆ pathLength

◆ tagBits

◆ targetCache

◆ threadInfo