gem5::minor::BranchData Class Reference

Forward data betwen Execute and Fetch1 carrying change-of-address/stream information. More...

#include <pipe_data.hh>

Public Types
enum	Reason {   NoBranch , CorrectlyPredictedBranch , UnpredictedBranch , BranchPrediction ,   BadlyPredictedBranchTarget , BadlyPredictedBranch , SuspendThread , Interrupt ,   HaltFetch }

Public Member Functions
	BranchData ()
	BranchData (Reason reason_, ThreadID thread_id, InstSeqNum new_stream_seq_num, InstSeqNum new_prediction_seq_num, const PCStateBase &_target, MinorDynInstPtr inst_)
	BranchData (const BranchData &other)
BranchData &	operator= (const BranchData &other)
bool	isBubble () const
bool	isStreamChange () const
	As static isStreamChange but on this branch data.
bool	isBranch () const
	As static isBranch but on this branch data.
void	reportData (std::ostream &os) const
	ReportIF interface.

Static Public Member Functions
static bool	isStreamChange (const BranchData::Reason reason)
	Is a request with this reason actually a request to change the PC rather than a bubble or branch prediction information.
static bool	isBranch (const BranchData::Reason reason)
	Is a request with this reason actually a 'real' branch, that is, a stream change that's not just an instruction to Fetch1 to halt or wake up.
static BranchData	bubble ()
	BubbleIF interface.

Public Attributes
Reason	reason = NoBranch
	Explanation for this branch.
ThreadID	threadId = InvalidThreadID
	ThreadID associated with branch.
InstSeqNum	newStreamSeqNum = 0
	Sequence number of new stream/prediction to be adopted.
InstSeqNum	newPredictionSeqNum = 0
std::unique_ptr< PCStateBase >	target
	Starting PC of that stream.
MinorDynInstPtr	inst = MinorDynInst::bubble()
	Instruction which caused this branch.

Detailed Description

Forward data betwen Execute and Fetch1 carrying change-of-address/stream information.

Definition at line 65 of file pipe_data.hh.

Member Enumeration Documentation

Reason

enum gem5::minor::BranchData::Reason

Enumerator
NoBranch
CorrectlyPredictedBranch
UnpredictedBranch
BranchPrediction
BadlyPredictedBranchTarget
BadlyPredictedBranch
SuspendThread
Interrupt
HaltFetch

Definition at line 68 of file pipe_data.hh.

Constructor & Destructor Documentation

BranchData() [1/3]

gem5::minor::BranchData::BranchData ( )

inline

Definition at line 128 of file pipe_data.hh.

Referenced by bubble().

BranchData() [2/3]

gem5::minor::BranchData::BranchData ( Reason reason_, ThreadID thread_id, InstSeqNum new_stream_seq_num, InstSeqNum new_prediction_seq_num, const PCStateBase & _target, MinorDynInstPtr inst_ )

inline

Definition at line 130 of file pipe_data.hh.

References gem5::ArmISA::set, and target.

BranchData() [3/3]

gem5::minor::BranchData::BranchData ( const BranchData & other )

inline

Definition at line 141 of file pipe_data.hh.

References gem5::ArmISA::set, and target.

Member Function Documentation

bubble()

static BranchData gem5::minor::BranchData::bubble ( )

inlinestatic

BubbleIF interface.

Definition at line 162 of file pipe_data.hh.

References BranchData().

Referenced by gem5::minor::Execute::evaluate().

isBranch() [1/2]

bool gem5::minor::BranchData::isBranch ( ) const

inline

As static isBranch but on this branch data.

Definition at line 169 of file pipe_data.hh.

References isBranch(), and reason.

Referenced by isBranch().

isBranch() [2/2]

bool gem5::minor::BranchData::isBranch ( const BranchData::Reason reason )

static

Is a request with this reason actually a 'real' branch, that is, a stream change that's not just an instruction to Fetch1 to halt or wake up.

Definition at line 112 of file pipe_data.cc.

References BadlyPredictedBranch, BadlyPredictedBranchTarget, BranchPrediction, CorrectlyPredictedBranch, HaltFetch, Interrupt, NoBranch, reason, SuspendThread, and UnpredictedBranch.

isBubble()

bool gem5::minor::BranchData::isBubble ( ) const

inline

Definition at line 163 of file pipe_data.hh.

References NoBranch, and reason.

Referenced by gem5::minor::Execute::commitInst(), gem5::minor::Execute::evaluate(), gem5::minor::Fetch1::evaluate(), gem5::minor::Fetch2::evaluate(), and reportData().

isStreamChange() [1/2]

bool gem5::minor::BranchData::isStreamChange ( ) const

inline

As static isStreamChange but on this branch data.

Definition at line 166 of file pipe_data.hh.

References isStreamChange(), and reason.

Referenced by isStreamChange(), and gem5::minor::Execute::updateBranchData().

isStreamChange() [2/2]

bool gem5::minor::BranchData::isStreamChange ( const BranchData::Reason reason )

static

Is a request with this reason actually a request to change the PC rather than a bubble or branch prediction information.

Definition at line 84 of file pipe_data.cc.

References BadlyPredictedBranch, BadlyPredictedBranchTarget, BranchPrediction, CorrectlyPredictedBranch, HaltFetch, Interrupt, NoBranch, reason, SuspendThread, and UnpredictedBranch.

Referenced by gem5::minor::Execute::commit(), gem5::minor::Fetch1::evaluate(), and gem5::minor::Fetch2::evaluate().

operator=()

BranchData & gem5::minor::BranchData::operator= ( const BranchData & other )

inline

Definition at line 150 of file pipe_data.hh.

References inst, newPredictionSeqNum, newStreamSeqNum, reason, gem5::ArmISA::set, target, and threadId.

reportData()

void gem5::minor::BranchData::reportData

(

std::ostream &

os

)

const

ReportIF interface.

Definition at line 140 of file pipe_data.cc.

References inst, isBubble(), newPredictionSeqNum, newStreamSeqNum, gem5::X86ISA::os, reason, and target.

Member Data Documentation

inst

MinorDynInstPtr gem5::minor::BranchData::inst = MinorDynInst::bubble()

Instruction which caused this branch.

Definition at line 125 of file pipe_data.hh.

Referenced by gem5::minor::operator<<(), operator=(), reportData(), and gem5::minor::Fetch2::updateBranchPrediction().

newPredictionSeqNum

InstSeqNum gem5::minor::BranchData::newPredictionSeqNum = 0

Definition at line 119 of file pipe_data.hh.

Referenced by gem5::minor::operator<<(), operator=(), reportData(), and gem5::minor::Fetch1::updateExpectedSeqNums().

newStreamSeqNum

InstSeqNum gem5::minor::BranchData::newStreamSeqNum = 0

Sequence number of new stream/prediction to be adopted.

Definition at line 118 of file pipe_data.hh.

Referenced by gem5::minor::Fetch1::evaluate(), gem5::minor::operator<<(), operator=(), reportData(), and gem5::minor::Fetch1::updateExpectedSeqNums().

reason

Reason gem5::minor::BranchData::reason = NoBranch

Explanation for this branch.

Definition at line 112 of file pipe_data.hh.

Referenced by gem5::minor::Fetch1::changeStream(), isBranch(), isBranch(), isBubble(), isStreamChange(), isStreamChange(), gem5::minor::operator<<(), operator=(), reportData(), and gem5::minor::Fetch2::updateBranchPrediction().

target

std::unique_ptr<PCStateBase> gem5::minor::BranchData::target

Starting PC of that stream.

Definition at line 122 of file pipe_data.hh.

Referenced by BranchData(), BranchData(), gem5::minor::Fetch1::changeStream(), gem5::minor::operator<<(), operator=(), gem5::minor::Fetch2::predictBranch(), reportData(), and gem5::minor::Fetch2::updateBranchPrediction().

threadId

ThreadID gem5::minor::BranchData::threadId = InvalidThreadID

ThreadID associated with branch.

Definition at line 115 of file pipe_data.hh.

Referenced by gem5::minor::Fetch1::changeStream(), gem5::minor::Fetch1::evaluate(), gem5::minor::Fetch2::evaluate(), operator=(), and gem5::minor::Fetch1::updateExpectedSeqNums().

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

• cpu/minor/pipe_data.hh
• cpu/minor/pipe_data.cc