gem5::prefetch::DeltaCorrelatingPredictionTables::DCPTEntry Struct Reference

DCPT Table entry datatype. More...

Inheritance diagram for gem5::prefetch::DeltaCorrelatingPredictionTables::DCPTEntry:

Public Member Functions
	DCPTEntry (unsigned int num_deltas, TagExtractor ext)
	Constructor.
void	invalidate () override
	Invalidate the block.
void	addAddress (Addr address, unsigned int delta_num_bits)
	Adds an address to the entry, if the entry already existed, a delta will be generated.
void	getCandidates (std::vector< Queued::AddrPriority > &pfs, unsigned int mask_bits) const
	Attempt to generate prefetch candidates using the two most recent deltas.
Public Member Functions inherited from gem5::CacheEntry
	CacheEntry (TagExtractor ext)
	~CacheEntry ()=default
virtual bool	isValid () const
	Checks if the entry is valid.
virtual Addr	getTag () const
	Get tag associated to this block.
virtual bool	match (const Addr addr) const
	Checks if the given tag information corresponds to this entry's.
virtual void	insert (const Addr addr)
	Insert the block by assigning it a tag and marking it valid.
std::string	print () const override
	Prints relevant information about this entry.
Public Member Functions inherited from gem5::ReplaceableEntry
	ReplaceableEntry ()
virtual	~ReplaceableEntry ()=default
virtual void	setPosition (const uint32_t set, const uint32_t way)
	Set both the set and way.
uint32_t	getSet () const
	Get set number.
uint32_t	getWay () const
	Get way number.

Public Attributes
Addr	lastAddress
	Last accessed address.
CircularQueue< Addr >	deltas
	Stored deltas.
Public Attributes inherited from gem5::ReplaceableEntry
std::shared_ptr< replacement_policy::ReplacementData >	replacementData
	Replacement data associated to this entry.

Additional Inherited Members
Public Types inherited from gem5::CacheEntry
using	IndexingPolicy = BaseIndexingPolicy
using	KeyType = Addr
using	TagExtractor = std::function<Addr(Addr)>
Protected Member Functions inherited from gem5::CacheEntry
virtual void	setTag (Addr _tag)
	Set tag associated to this block.
virtual void	setValid ()
	Set valid bit.
Protected Attributes inherited from gem5::ReplaceableEntry
uint32_t	_set
	Set to which this entry belongs.
uint32_t	_way
	Way (relative position within the set) to which this entry belongs.

Detailed Description

DCPT Table entry datatype.

Definition at line 68 of file delta_correlating_prediction_tables.hh.

Constructor & Destructor Documentation

DCPTEntry()

gem5::prefetch::DeltaCorrelatingPredictionTables::DCPTEntry::DCPTEntry ( unsigned int num_deltas, TagExtractor ext )

inline

Constructor.

Parameters

num_deltas

number of deltas stored in the entry

Definition at line 79 of file delta_correlating_prediction_tables.hh.

References gem5::CacheEntry::CacheEntry(), deltas, gem5::ArmISA::ext, and lastAddress.

Member Function Documentation

addAddress()

void gem5::prefetch::DeltaCorrelatingPredictionTables::DCPTEntry::addAddress	(	Addr	address,
		unsigned int	delta_num_bits )

Adds an address to the entry, if the entry already existed, a delta will be generated.

Parameters

address	address to add
delta_num_bits	number of bits of the delta

Definition at line 65 of file delta_correlating_prediction_tables.cc.

References deltas, and lastAddress.

Referenced by gem5::prefetch::DeltaCorrelatingPredictionTables::calculatePrefetch().

getCandidates()

void gem5::prefetch::DeltaCorrelatingPredictionTables::DCPTEntry::getCandidates	(	std::vector< Queued::AddrPriority > &	pfs,
		unsigned int	mask_bits ) const

Attempt to generate prefetch candidates using the two most recent deltas.

Prefetch candidates are added to the provided vector.

Parameters

pfs	reference to a vector where candidates will be added
mask_bits	the number of lower bits that should be masked (ignored) when comparing deltas

Definition at line 89 of file delta_correlating_prediction_tables.cc.

References gem5::X86ISA::addr, deltas, lastAddress, and gem5::ArmISA::mask.

Referenced by gem5::prefetch::DeltaCorrelatingPredictionTables::calculatePrefetch().

invalidate()

void gem5::prefetch::DeltaCorrelatingPredictionTables::DCPTEntry::invalidate ( )

overridevirtual

Invalidate the block.

Its contents are no longer valid.

Reimplemented from gem5::CacheEntry.

Definition at line 53 of file delta_correlating_prediction_tables.cc.

References deltas, gem5::CacheEntry::invalidate(), and lastAddress.

Member Data Documentation

deltas

CircularQueue<Addr> gem5::prefetch::DeltaCorrelatingPredictionTables::DCPTEntry::deltas

Stored deltas.

Definition at line 73 of file delta_correlating_prediction_tables.hh.

Referenced by addAddress(), DCPTEntry(), getCandidates(), and invalidate().

lastAddress

Addr gem5::prefetch::DeltaCorrelatingPredictionTables::DCPTEntry::lastAddress

Last accessed address.

Definition at line 71 of file delta_correlating_prediction_tables.hh.

Referenced by addAddress(), gem5::prefetch::DeltaCorrelatingPredictionTables::calculatePrefetch(), DCPTEntry(), getCandidates(), and invalidate().

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

• mem/cache/prefetch/delta_correlating_prediction_tables.hh
• mem/cache/prefetch/delta_correlating_prediction_tables.cc