gem5::branch_prediction::MultiperspectivePerceptron::HistorySpec Struct Reference

Base class to implement the predictor tables. More...

#include <multiperspective_perceptron.hh>

Inheritance diagram for gem5::branch_prediction::MultiperspectivePerceptron::HistorySpec:

Public Member Functions
	HistorySpec (int _p1, int _p2, int _p3, double _coeff, int _size, int _width, MultiperspectivePerceptron &_mpp)
virtual unsigned int	getHash (ThreadID tid, Addr pc, Addr pc2, int t) const =0
	Gets the hash to index the table, using the pc of the branch, and the index of the table.
virtual void	setBitRequirements () const
	Sets the size requirements of the table, used when initializing to set the proper size of the tables.

Public Attributes
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

Base class to implement the predictor tables.

Definition at line 237 of file multiperspective_perceptron.hh.

Constructor & Destructor Documentation

HistorySpec()

gem5::branch_prediction::MultiperspectivePerceptron::HistorySpec::HistorySpec ( int _p1, int _p2, int _p3, double _coeff, int _size, int _width, MultiperspectivePerceptron & _mpp )

inline

Definition at line 254 of file multiperspective_perceptron.hh.

Member Function Documentation

getHash()

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

pure virtual

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

Implemented in gem5::branch_prediction::MultiperspectivePerceptron::ACYCLIC, gem5::branch_prediction::MultiperspectivePerceptron::BIAS, gem5::branch_prediction::MultiperspectivePerceptron::BLURRYPATH, gem5::branch_prediction::MultiperspectivePerceptron::GHIST, gem5::branch_prediction::MultiperspectivePerceptron::GHISTMODPATH, gem5::branch_prediction::MultiperspectivePerceptron::GHISTPATH, gem5::branch_prediction::MultiperspectivePerceptron::IMLI, gem5::branch_prediction::MultiperspectivePerceptron::LOCAL, gem5::branch_prediction::MultiperspectivePerceptron::MODHIST, gem5::branch_prediction::MultiperspectivePerceptron::MODPATH, gem5::branch_prediction::MultiperspectivePerceptron::PATH, gem5::branch_prediction::MultiperspectivePerceptron::RECENCY, gem5::branch_prediction::MultiperspectivePerceptron::RECENCYPOS, and gem5::branch_prediction::MultiperspectivePerceptron::SGHISTPATH.

Referenced by gem5::branch_prediction::MultiperspectivePerceptron::getIndex(), and gem5::branch_prediction::MultiperspectivePerceptronTAGE::getIndex().

setBitRequirements()

virtual void gem5::branch_prediction::MultiperspectivePerceptron::HistorySpec::setBitRequirements ( ) const

inlinevirtual

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

Reimplemented in gem5::branch_prediction::MultiperspectivePerceptron::ACYCLIC, gem5::branch_prediction::MultiperspectivePerceptron::BLURRYPATH, gem5::branch_prediction::MultiperspectivePerceptron::GHIST, gem5::branch_prediction::MultiperspectivePerceptron::GHISTMODPATH, gem5::branch_prediction::MultiperspectivePerceptron::GHISTPATH, gem5::branch_prediction::MultiperspectivePerceptron::IMLI, gem5::branch_prediction::MultiperspectivePerceptron::LOCAL, gem5::branch_prediction::MultiperspectivePerceptron::MODHIST, gem5::branch_prediction::MultiperspectivePerceptron::MODPATH, gem5::branch_prediction::MultiperspectivePerceptron::PATH, gem5::branch_prediction::MultiperspectivePerceptron::RECENCY, and gem5::branch_prediction::MultiperspectivePerceptron::RECENCYPOS.

Definition at line 275 of file multiperspective_perceptron.hh.

Member Data Documentation

coeff

const double gem5::branch_prediction::MultiperspectivePerceptron::HistorySpec::coeff

Coefficient of the feature, models the accuracy of the feature.

Definition at line 246 of file multiperspective_perceptron.hh.

Referenced by gem5::branch_prediction::MultiperspectivePerceptron::computeOutput(), and gem5::branch_prediction::MultiperspectivePerceptron::train().

mpp

MultiperspectivePerceptron& gem5::branch_prediction::MultiperspectivePerceptron::HistorySpec::mpp

Reference to the branch predictor class.

Definition at line 252 of file multiperspective_perceptron.hh.

Referenced by gem5::branch_prediction::MultiperspectivePerceptron::ACYCLIC::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::BLURRYPATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::GHIST::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::GHISTMODPATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::GHISTPATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::IMLI::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::LOCAL::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::MODHIST::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::MODPATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::PATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::RECENCY::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::RECENCYPOS::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::SGHISTPATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::ACYCLIC::setBitRequirements(), gem5::branch_prediction::MultiperspectivePerceptron::BLURRYPATH::setBitRequirements(), gem5::branch_prediction::MultiperspectivePerceptron::GHIST::setBitRequirements(), gem5::branch_prediction::MultiperspectivePerceptron::GHISTMODPATH::setBitRequirements(), gem5::branch_prediction::MultiperspectivePerceptron::GHISTPATH::setBitRequirements(), gem5::branch_prediction::MultiperspectivePerceptron::IMLI::setBitRequirements(), gem5::branch_prediction::MultiperspectivePerceptron::LOCAL::setBitRequirements(), gem5::branch_prediction::MultiperspectivePerceptron::MODHIST::setBitRequirements(), gem5::branch_prediction::MultiperspectivePerceptron::MODPATH::setBitRequirements(), gem5::branch_prediction::MultiperspectivePerceptron::PATH::setBitRequirements(), gem5::branch_prediction::MultiperspectivePerceptron::RECENCY::setBitRequirements(), and gem5::branch_prediction::MultiperspectivePerceptron::RECENCYPOS::setBitRequirements().

p1

const int gem5::branch_prediction::MultiperspectivePerceptron::HistorySpec::p1

First parameter.

Definition at line 240 of file multiperspective_perceptron.hh.

Referenced by gem5::branch_prediction::MultiperspectivePerceptron::ACYCLIC::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::BLURRYPATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::GHIST::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::GHISTMODPATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::GHISTPATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::IMLI::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::LOCAL::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::MODHIST::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::MODPATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::PATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::RECENCY::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::RECENCYPOS::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::SGHISTPATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::ACYCLIC::setBitRequirements(), gem5::branch_prediction::MultiperspectivePerceptron::BLURRYPATH::setBitRequirements(), gem5::branch_prediction::MultiperspectivePerceptron::GHISTMODPATH::setBitRequirements(), gem5::branch_prediction::MultiperspectivePerceptron::GHISTPATH::setBitRequirements(), gem5::branch_prediction::MultiperspectivePerceptron::IMLI::setBitRequirements(), gem5::branch_prediction::MultiperspectivePerceptron::MODHIST::setBitRequirements(), gem5::branch_prediction::MultiperspectivePerceptron::MODPATH::setBitRequirements(), gem5::branch_prediction::MultiperspectivePerceptron::PATH::setBitRequirements(), gem5::branch_prediction::MultiperspectivePerceptron::RECENCY::setBitRequirements(), and gem5::branch_prediction::MultiperspectivePerceptron::RECENCYPOS::setBitRequirements().

p2

const int gem5::branch_prediction::MultiperspectivePerceptron::HistorySpec::p2

Second parameter.

Definition at line 242 of file multiperspective_perceptron.hh.

Referenced by gem5::branch_prediction::MultiperspectivePerceptron::ACYCLIC::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::BLURRYPATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::GHIST::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::GHISTMODPATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::GHISTPATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::MODHIST::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::MODPATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::PATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::RECENCY::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::SGHISTPATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::BLURRYPATH::setBitRequirements(), gem5::branch_prediction::MultiperspectivePerceptron::GHIST::setBitRequirements(), gem5::branch_prediction::MultiperspectivePerceptron::GHISTMODPATH::setBitRequirements(), gem5::branch_prediction::MultiperspectivePerceptron::MODHIST::setBitRequirements(), and gem5::branch_prediction::MultiperspectivePerceptron::MODPATH::setBitRequirements().

p3

const int gem5::branch_prediction::MultiperspectivePerceptron::HistorySpec::p3

Third parameter.

Definition at line 244 of file multiperspective_perceptron.hh.

Referenced by gem5::branch_prediction::MultiperspectivePerceptron::ACYCLIC::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::BLURRYPATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::GHISTMODPATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::GHISTPATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::MODPATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::PATH::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::RECENCY::getHash(), gem5::branch_prediction::MultiperspectivePerceptron::SGHISTPATH::getHash(), and gem5::branch_prediction::MultiperspectivePerceptron::ACYCLIC::setBitRequirements().

size

const int gem5::branch_prediction::MultiperspectivePerceptron::HistorySpec::size

Pre-assigned size in bits assigned to this feature.

Definition at line 248 of file multiperspective_perceptron.hh.

width

const int gem5::branch_prediction::MultiperspectivePerceptron::HistorySpec::width

Width of the table in bits

Definition at line 250 of file multiperspective_perceptron.hh.

Referenced by gem5::branch_prediction::MultiperspectivePerceptron::computeOutput(), and gem5::branch_prediction::MultiperspectivePerceptron::train().

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

• cpu/pred/multiperspective_perceptron.hh