gem5 [DEVELOP-FOR-25.0]
Loading...
Searching...
No Matches
Public Member Functions | Public Attributes | List of all members
gem5::branch_prediction::MultiperspectivePerceptron::HistorySpec Struct Referenceabstract

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

#include <multiperspective_perceptron.hh>

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

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 238 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 255 of file multiperspective_perceptron.hh.

References coeff, mpp, gem5::branch_prediction::MultiperspectivePerceptron::MultiperspectivePerceptron(), p1, p2, p3, size, and width.

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

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
tidThread ID of the branch
pcaddress of the branch
pc2address of the branch shifted 2 bits to the right
tinteger 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.

References gem5::MipsISA::pc, and gem5::ArmISA::t.

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 276 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 247 of file multiperspective_perceptron.hh.

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

◆ mpp

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

Reference to the branch predictor class.

Definition at line 253 of file multiperspective_perceptron.hh.

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

◆ p1

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

First parameter.

Definition at line 241 of file multiperspective_perceptron.hh.

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

◆ p2

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

Second parameter.

Definition at line 243 of file multiperspective_perceptron.hh.

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

◆ p3

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

Third parameter.

Definition at line 245 of file multiperspective_perceptron.hh.

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

◆ size

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

Pre-assigned size in bits assigned to this feature.

Definition at line 249 of file multiperspective_perceptron.hh.

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

◆ width

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

Width of the table in bits.

Definition at line 251 of file multiperspective_perceptron.hh.

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

The documentation for this struct was generated from the following file:
Generated on Mon May 26 2025 09:19:30 for gem5 by doxygen 1.13.2