gem5: MultiperspectivePerceptron::HistorySpec Struct Reference

gem5 v20.1.0.0

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

#include <multiperspective_perceptron.hh>

Inheritance diagram for 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. More...

virtual void	setBitRequirements () const
	Sets the size requirements of the table, used when initializing to set the proper size of the tables. More...

Public Attributes
const int	p1
	First parameter. More...

const int	p2
	Second parameter. More...

const int	p3
	Third parameter. More...

const double	coeff
	Coefficient of the feature, models the accuracy of the feature. More...

const int	size
	Pre-assigned size in bits assigned to this feature. More...

const int	width
	Width of the table in bits More...

MultiperspectivePerceptron &	mpp
	Reference to the branch predictor class. More...

Detailed Description

Base class to implement the predictor tables.

Definition at line 216 of file multiperspective_perceptron.hh.

Constructor & Destructor Documentation

◆ HistorySpec()

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

inline

Definition at line 232 of file multiperspective_perceptron.hh.

Member Function Documentation

◆ getHash()

virtual unsigned int 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 MultiperspectivePerceptron::SGHISTPATH, MultiperspectivePerceptron::RECENCYPOS, MultiperspectivePerceptron::BLURRYPATH, MultiperspectivePerceptron::GHISTMODPATH, MultiperspectivePerceptron::GHISTPATH, MultiperspectivePerceptron::MODPATH, MultiperspectivePerceptron::LOCAL, MultiperspectivePerceptron::PATH, MultiperspectivePerceptron::IMLI, MultiperspectivePerceptron::RECENCY, MultiperspectivePerceptron::BIAS, MultiperspectivePerceptron::MODHIST, MultiperspectivePerceptron::ACYCLIC, and MultiperspectivePerceptron::GHIST.

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

◆ setBitRequirements()

virtual void 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 MultiperspectivePerceptron::RECENCYPOS, MultiperspectivePerceptron::BLURRYPATH, MultiperspectivePerceptron::GHISTMODPATH, MultiperspectivePerceptron::GHISTPATH, MultiperspectivePerceptron::MODPATH, MultiperspectivePerceptron::LOCAL, MultiperspectivePerceptron::PATH, MultiperspectivePerceptron::IMLI, MultiperspectivePerceptron::RECENCY, MultiperspectivePerceptron::MODHIST, MultiperspectivePerceptron::ACYCLIC, and MultiperspectivePerceptron::GHIST.

Definition at line 253 of file multiperspective_perceptron.hh.

Member Data Documentation

◆ coeff

const double MultiperspectivePerceptron::HistorySpec::coeff

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

Definition at line 224 of file multiperspective_perceptron.hh.

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

◆ mpp

MultiperspectivePerceptron& MultiperspectivePerceptron::HistorySpec::mpp

Reference to the branch predictor class.

Definition at line 230 of file multiperspective_perceptron.hh.

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

◆ p1

const int MultiperspectivePerceptron::HistorySpec::p1

First parameter.

Definition at line 218 of file multiperspective_perceptron.hh.

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

◆ p2

const int MultiperspectivePerceptron::HistorySpec::p2

Second parameter.

Definition at line 220 of file multiperspective_perceptron.hh.

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

◆ p3

const int MultiperspectivePerceptron::HistorySpec::p3

Third parameter.

Definition at line 222 of file multiperspective_perceptron.hh.

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

◆ size

const int MultiperspectivePerceptron::HistorySpec::size

Pre-assigned size in bits assigned to this feature.

Definition at line 226 of file multiperspective_perceptron.hh.

◆ width

const int MultiperspectivePerceptron::HistorySpec::width

Width of the table in bits

Definition at line 228 of file multiperspective_perceptron.hh.

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

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

cpu/pred/multiperspective_perceptron.hh

Generated on Wed Sep 30 2020 14:02:28 for gem5 by doxygen 1.8.17