gem5::branch_prediction::MultiperspectivePerceptron::GHIST Class Reference

Available features. More...

#include <multiperspective_perceptron.hh>

Inheritance diagram for gem5::branch_prediction::MultiperspectivePerceptron::GHIST:

Public Member Functions
	GHIST (int p1, int p2, double coeff, int size, int width, MultiperspectivePerceptron &mpp)
unsigned int	getHash (ThreadID tid, Addr pc, Addr pc2, int t) const override
	Gets the hash to index the table, using the pc of the branch, and the index of the table.
void	setBitRequirements () const override
	Sets the size requirements of the table, used when initializing to set the proper size of the tables.
Public Member Functions inherited from gem5::branch_prediction::MultiperspectivePerceptron::HistorySpec
	HistorySpec (int _p1, int _p2, int _p3, double _coeff, int _size, int _width, MultiperspectivePerceptron &_mpp)

Static Public Member Functions
static unsigned int	hash (const std::vector< unsigned int > &ghist_words, int block_size, int start_pos, int end_pos)

Additional Inherited Members
Public Attributes inherited from gem5::branch_prediction::MultiperspectivePerceptron::HistorySpec
const int	p1
	First parameter.
const int	p2
	Second parameter.
const int	p3
	Third parameter.
const double	coeff
	Coefficient of the feature, models the accuracy of the feature.
const int	size
	Pre-assigned size in bits assigned to this feature.
const int	width
	Width of the table in bits
MultiperspectivePerceptron &	mpp
	Reference to the branch predictor class.

Detailed Description

Available features.

Definition at line 506 of file multiperspective_perceptron.hh.

Constructor & Destructor Documentation

GHIST()

gem5::branch_prediction::MultiperspectivePerceptron::GHIST::GHIST ( int p1, int p2, double coeff, int size, int width, MultiperspectivePerceptron & mpp )

inline

Definition at line 509 of file multiperspective_perceptron.hh.

Member Function Documentation

getHash()

unsigned int gem5::branch_prediction::MultiperspectivePerceptron::GHIST::getHash ( ThreadID tid, Addr pc, Addr pc2, int t ) const

inlineoverridevirtual

Gets the hash to index the table, using the pc of the branch, and the index of the table.

Parameters

tid	Thread ID of the branch
pc	address of the branch
pc2	address of the branch shifted 2 bits to the right
t	integer index of the table

Returns

resulting hash value that will be used to index the table

Implements gem5::branch_prediction::MultiperspectivePerceptron::HistorySpec.

Definition at line 514 of file multiperspective_perceptron.hh.

References gem5::branch_prediction::MultiperspectivePerceptron::blockSize, hash(), gem5::branch_prediction::MultiperspectivePerceptron::HistorySpec::mpp, gem5::branch_prediction::MultiperspectivePerceptron::HistorySpec::p1, gem5::branch_prediction::MultiperspectivePerceptron::HistorySpec::p2, and gem5::branch_prediction::MultiperspectivePerceptron::threadData.

hash()

static unsigned int gem5::branch_prediction::MultiperspectivePerceptron::GHIST::hash ( const std::vector< unsigned int > & ghist_words, int block_size, int start_pos, int end_pos )

inlinestatic

Definition at line 521 of file multiperspective_perceptron.hh.

References gem5::ArmISA::a, gem5::SparcISA::am, gem5::ArmISA::b, gem5::ArmISA::i, and gem5::RiscvISA::x.

Referenced by getHash().

setBitRequirements()

void gem5::branch_prediction::MultiperspectivePerceptron::GHIST::setBitRequirements ( ) const

inlineoverridevirtual

Sets the size requirements of the table, used when initializing to set the proper size of the tables.

Reimplemented from gem5::branch_prediction::MultiperspectivePerceptron::HistorySpec.

Definition at line 550 of file multiperspective_perceptron.hh.

References gem5::branch_prediction::MultiperspectivePerceptron::ghist_length, gem5::branch_prediction::MultiperspectivePerceptron::HistorySpec::mpp, and gem5::branch_prediction::MultiperspectivePerceptron::HistorySpec::p2.

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

• cpu/pred/multiperspective_perceptron.hh