Minor::Execute Class Reference

Execute stage. More...

#include <execute.hh>

Inheritance diagram for Minor::Execute:

Classes
struct	ExecuteThreadInfo

Public Member Functions
	Execute (const std::string &name_, MinorCPU &cpu_, MinorCPUParams &params, Latch< ForwardInstData >::Output inp_, Latch< BranchData >::Input out_)
	~Execute ()
MinorCPU::MinorCPUPort &	getDcachePort ()
	Returns the DcachePort owned by this Execute to pass upwards. More...
LSQ &	getLSQ ()
	To allow ExecContext to find the LSQ. More...
bool	instIsRightStream (MinorDynInstPtr inst)
	Does the given instruction have the right stream sequence number to be committed? More...
bool	instIsHeadInst (MinorDynInstPtr inst)
	Returns true if the given instruction is at the head of the inFlightInsts instruction queue. More...
void	evaluate ()
	Pass on input/buffer data to the output if you can. More...
void	minorTrace () const
bool	isDrained ()
	After thread suspension, has Execute been drained of in-flight instructions and memory accesses. More...
unsigned int	drain ()
	Like the drain interface on SimObject. More...
void	drainResume ()
Public Member Functions inherited from Named
	Named (const std::string &name_)
const std::string &	name () const

Public Attributes
std::vector< InputBuffer < ForwardInstData > >	inputBuffer

Protected Types
enum	DrainState { NotDraining, DrainCurrentInst, DrainHaltFetch, DrainAllInsts }
	Stage cycle-by-cycle state. More...

Protected Member Functions
const ForwardInstData *	getInput (ThreadID tid)
	Get a piece of data to work on from the inputBuffer, or 0 if there is no data. More...
void	popInput (ThreadID tid)
	Pop an element off the input buffer, if there are any. More...
void	tryToBranch (MinorDynInstPtr inst, Fault fault, BranchData &branch)
	Generate Branch data based (into branch) on an observed (or not) change in PC while executing an instruction. More...
void	updateBranchData (ThreadID tid, BranchData::Reason reason, MinorDynInstPtr inst, const TheISA::PCState &target, BranchData &branch)
	Actually create a branch to communicate to Fetch1/Fetch2 and, if that is a stream-changing branch update the streamSeqNum. More...
void	handleMemResponse (MinorDynInstPtr inst, LSQ::LSQRequestPtr response, BranchData &branch, Fault &fault)
	Handle extracting mem ref responses from the memory queues and completing the associated instructions. More...
bool	executeMemRefInst (MinorDynInstPtr inst, BranchData &branch, bool &failed_predicate, Fault &fault)
	Execute a memory reference instruction. More...
bool	isInterrupted (ThreadID thread_id) const
	Has an interrupt been raised. More...
bool	isInbetweenInsts (ThreadID thread_id) const
	Are we between instructions? Can we be interrupted? More...
bool	takeInterrupt (ThreadID thread_id, BranchData &branch)
	Act on an interrupt. More...
unsigned int	issue (ThreadID thread_id)
	Try and issue instructions from the inputBuffer. More...
bool	tryPCEvents (ThreadID thread_id)
	Try to act on PC-related events. More...
void	doInstCommitAccounting (MinorDynInstPtr inst)
	Do the stats handling and instruction count and PC event events related to the new instruction/op counts. More...
ThreadID	checkInterrupts (BranchData &branch, bool &interrupted)
	Check all threads for possible interrupts. More...
bool	hasInterrupt (ThreadID thread_id)
	Checks if a specific thread has an interrupt. More...
bool	commitInst (MinorDynInstPtr inst, bool early_memory_issue, BranchData &branch, Fault &fault, bool &committed, bool &completed_mem_issue)
	Commit a single instruction. More...
void	commit (ThreadID thread_id, bool only_commit_microops, bool discard, BranchData &branch)
	Try and commit instructions from the ends of the functional unit pipelines. More...
void	setDrainState (ThreadID thread_id, DrainState state)
	Set the drain state (with useful debugging messages) More...
ThreadID	getCommittingThread ()
	Use the current threading policy to determine the next thread to decode from. More...
ThreadID	getIssuingThread ()

Protected Attributes
Latch< ForwardInstData >::Output	inp
	Input port carrying instructions from Decode. More...
Latch< BranchData >::Input	out
	Input port carrying stream changes to Fetch1. More...
MinorCPU &	cpu
	Pointer back to the containing CPU. More...
unsigned int	issueLimit
	Number of instructions that can be issued per cycle. More...
unsigned int	memoryIssueLimit
	Number of memory ops that can be issued per cycle. More...
unsigned int	commitLimit
	Number of instructions that can be committed per cycle. More...
unsigned int	memoryCommitLimit
	Number of memory instructions that can be committed per cycle. More...
bool	processMoreThanOneInput
	If true, more than one input line can be processed each cycle if there is room to execute more instructions than taken from the first line. More...
MinorFUPool &	fuDescriptions
	Descriptions of the functional units we want to generate. More...
unsigned int	numFuncUnits
	Number of functional units to produce. More...
Cycles	longestFuLatency
	Longest latency of any FU, useful for setting up the activity recoder. More...
bool	setTraceTimeOnCommit
	Modify instruction trace times on commit. More...
bool	setTraceTimeOnIssue
	Modify instruction trace times on issue. More...
bool	allowEarlyMemIssue
	Allow mem refs to leave their FUs before reaching the head of the in flight insts queue if their dependencies are met. More...
unsigned int	noCostFUIndex
	The FU index of the non-existent costless FU for instructions which pass the MinorDynInst::isNoCostInst test. More...
LSQ	lsq
	Dcache port to pass on to the CPU. More...
std::vector< Scoreboard >	scoreboard
	Scoreboard of instruction dependencies. More...
std::vector< FUPipeline * >	funcUnits
	The execution functional units. More...
std::vector< ExecuteThreadInfo >	executeInfo
ThreadID	interruptPriority
ThreadID	issuePriority
ThreadID	commitPriority
Protected Attributes inherited from Named
const std::string	_name

Friends
std::ostream &	operator<< (std::ostream &os, DrainState state)

Detailed Description

Execute stage.

Everything apart from fetching and decoding instructions. The LSQ lives here too.

Definition at line 62 of file execute.hh.

Member Enumeration Documentation

enum Minor::Execute::DrainState

protected

Stage cycle-by-cycle state.

State that drain passes through (in order). On a drain request, Execute transitions into either DrainCurrentInst (if between microops) or DrainHaltFetch.

Note that Execute doesn't actually have * a 'Drained' state, only an indication that it's currently draining and isDrained that can't tell if there are insts still in the pipeline leading up to Execute

Enumerator
NotDraining
DrainCurrentInst
DrainHaltFetch
DrainAllInsts

Definition at line 138 of file execute.hh.

Constructor & Destructor Documentation

Minor::Execute::Execute	(	const std::string &	name_,
		MinorCPU &	cpu_,
		MinorCPUParams &	params,
		Latch< ForwardInstData >::Output	inp_,
		Latch< BranchData >::Input	out_
	)

Check that there is a functional unit for all operation classes

Definition at line 62 of file execute.cc.

References commitLimit, cpu, executeInfo, fatal, PowerISA::fu, fuDescriptions, funcUnits, MinorFUPool::funcUnits, ArmISA::i, inputBuffer, issueLimit, memoryCommitLimit, memoryIssueLimit, Num_OpClasses, numFuncUnits, MinorFU::opLat, scoreboard, and warn.

Minor::Execute::~Execute

(

)

Definition at line 1834 of file execute.cc.

References cpu, executeInfo, funcUnits, ArmISA::i, and numFuncUnits.

Member Function Documentation

ThreadID Minor::Execute::checkInterrupts ( BranchData &  branch, bool &  interrupted  )

protected

Check all threads for possible interrupts.

If interrupt is taken, returns the tid of the thread. interrupted is set if any thread has an interrupt, irrespective of if it is taken

Definition at line 1579 of file execute.cc.

References cpu, DPRINTF, executeInfo, FullSystem, interruptPriority, InvalidThreadID, isInbetweenInsts(), isInterrupted(), NotDraining, and takeInterrupt().

Referenced by evaluate().

void Minor::Execute::commit ( ThreadID  thread_id, bool  only_commit_microops, bool  discard, BranchData &  branch  )

protected

Try and commit instructions from the ends of the functional unit pipelines.

If only_commit_microops is true then only commit upto the end of the currect full instruction. If discard is true then discard all instructions rather than committing. branch is set to any branch raised during commit.

Try and execute as many instructions from the end of FU pipelines as possible. This doesn't include actually advancing the pipelines.

We do this by looping on the front of the inFlightInsts queue for as long as we can find the desired instruction at the end of the functional unit it was issued to without seeing a branch or a fault. In this function, these terms are used: complete – The instruction has finished its passage through its functional unit and its fate has been decided (committed, discarded, issued to the memory system) commit – The instruction is complete(d), not discarded and has its effects applied to the CPU state discard(ed) – The instruction is complete but not committed as its streamSeqNum disagrees with the current Execute::streamSeqNum

Commits are also possible from two other places:

1) Responses returning from the LSQ 2) Mem ops issued to the LSQ ('committed' from the FUs) earlier than their position in the inFlightInsts queue, but after all their dependencies are resolved.

Definition at line 1003 of file execute.cc.

References Minor::MinorDynInst::bubble(), Minor::LSQ::canRequest(), commitInst(), commitLimit, Minor::LSQ::completeMemBarrierInst(), cpu, curTick(), DPRINTF, DTRACE, executeInfo, Minor::LSQ::findResponse(), Minor::SelfStallingPipeline< ElemType, ReportTraits, BubbleTraits >::front(), PowerISA::fu, funcUnits, Minor::LSQ::getLastMemBarrier(), handleMemResponse(), Minor::Execute::ExecuteThreadInfo::inFlightInsts, Minor::Execute::ExecuteThreadInfo::inFUMemInsts, Minor::QueuedInst::inst, Minor::ForwardInstData::insts, Minor::Execute::ExecuteThreadInfo::instsBeingCommitted, isInbetweenInsts(), Minor::BranchData::isStreamChange(), Minor::Execute::ExecuteThreadInfo::lastCommitWasEndOfMacroop, Minor::Execute::ExecuteThreadInfo::lastPredictionSeqNum, lsq, memoryCommitLimit, noCostFUIndex, NoFault, Minor::MinorStats::numDiscardedOps, ThreadContext::pcState(), Minor::LSQ::popResponse(), scoreboard, setTraceTimeOnCommit, MinorCPU::stats, Minor::Execute::ExecuteThreadInfo::streamSeqNum, tryPCEvents(), Minor::BranchData::UnpredictedBranch, and updateBranchData().

Referenced by evaluate().

bool Minor::Execute::commitInst ( MinorDynInstPtr  inst, bool  early_memory_issue, BranchData &  branch, Fault &  fault, bool &  committed, bool &  completed_mem_issue  )

protected

Commit a single instruction.

Returns true if the instruction being examined was completed (fully executed, discarded, or initiated a memory access), false if there is still some processing to do. fu_index is the index of the functional unit this instruction is being executed in into for funcUnits If early_memory_issue is true then this is an early execution of a mem ref and so faults will not be processed. If the return value is true: fault is set if a fault happened, branch is set to indicate any branch that occurs committed is set to true if this instruction is committed (and so needs to be traced and accounted for) completed_mem_issue is set if the instruction was a memory access that was issued

Definition at line 870 of file execute.cc.

References Minor::LSQ::canPushIntoStoreBuffer(), cpu, doInstCommitAccounting(), DPRINTF, executeInfo, executeMemRefInst(), Minor::BranchData::isBubble(), isInterrupted(), lsq, NoFault, Minor::MinorStats::numFetchSuspends, panic, Minor::ExecContext::readPredicate(), MinorCPU::stats, ThreadContext::status(), ThreadContext::Suspended, Minor::BranchData::SuspendThread, MinorCPU::threads, tryToBranch(), and updateBranchData().

Referenced by commit().

void Minor::Execute::doInstCommitAccounting ( MinorDynInstPtr  inst )

protected

Do the stats handling and instruction count and PC event events related to the new instruction/op counts.

Definition at line 837 of file execute.cc.

References Minor::MinorStats::committedInstType, cpu, Minor::MinorStats::numInsts, Minor::MinorStats::numOps, MinorCPU::stats, and MinorCPU::threads.

Referenced by commitInst(), and handleMemResponse().

unsigned int Minor::Execute::drain

(

)

Like the drain interface on SimObject.

Definition at line 1796 of file execute.cc.

References cpu, DPRINTF, DrainCurrentInst, DrainHaltFetch, executeInfo, Minor::Pipeline::ExecuteStageId, isDrained(), isInbetweenInsts(), NotDraining, setDrainState(), and MinorCPU::wakeupOnEvent().

Referenced by Minor::Pipeline::drain().

void Minor::Execute::drainResume

(

)

Definition at line 1753 of file execute.cc.

References cpu, DPRINTF, Minor::Pipeline::ExecuteStageId, NotDraining, setDrainState(), and MinorCPU::wakeupOnEvent().

Referenced by Minor::Pipeline::drainResume().

void Minor::Execute::evaluate

(

)

Pass on input/buffer data to the output if you can.

Definition at line 1393 of file execute.cc.

References ActivityRecorder::activity(), MinorCPU::activityRecorder, Minor::FUPipeline::advance(), Minor::BranchData::bubble(), Minor::MinorDynInst::bubble(), checkInterrupts(), commit(), cpu, DPRINTF, DrainAllInsts, DrainCurrentInst, DrainHaltFetch, Minor::Execute::ExecuteThreadInfo::drainState, executeInfo, Minor::Pipeline::ExecuteStageId, Minor::LSQ::findResponse(), Minor::SelfStallingPipeline< ElemType, ReportTraits, BubbleTraits >::front(), PowerISA::fu, funcUnits, getCommittingThread(), getInput(), getIssuingThread(), Minor::BranchData::HaltFetch, hasInterrupt(), ArmISA::i, inp, inputBuffer, Minor::QueuedInst::inst, Minor::ForwardInstData::insts, InvalidThreadID, Minor::BranchData::isBubble(), isInbetweenInsts(), issue(), lsq, Minor::LSQ::needsToTick(), NotDraining, numFuncUnits, Minor::SelfStallingPipeline< ElemType, ReportTraits, BubbleTraits >::occupancy, out, popInput(), FuncUnit::provides(), scoreboard, setDrainState(), Minor::SelfStallingPipeline< ElemType, ReportTraits, BubbleTraits >::stalled, Minor::LSQ::step(), updateBranchData(), and MinorCPU::wakeupOnEvent().

Referenced by Minor::Pipeline::evaluate().

bool Minor::Execute::executeMemRefInst ( MinorDynInstPtr  inst, BranchData &  branch, bool &  failed_predicate, Fault &  fault  )

protected

Execute a memory reference instruction.

This calls initiateAcc on the instruction which will then call writeMem or readMem to issue a memory access to the LSQ. Returns true if the instruction was executed rather than stalled because of a lack of LSQ resources and false otherwise. branch is set to any branch raised by the instruction. failed_predicate is set to false if the instruction passed its predicate and so will access memory or true if the instruction failed its predicate and is now complete. fault is set if any non-NoFault fault is raised. Any faults raised are actually invoke-d by this function.

Definition at line 444 of file execute.cc.

References Minor::LSQ::canRequest(), cpu, DPRINTF, lsq, NoFault, ThreadContext::pcState(), Minor::LSQ::pushFailedRequest(), Minor::ExecContext::readPredicate(), and MinorCPU::threads.

Referenced by commitInst().

ThreadID Minor::Execute::getCommittingThread ( )

inlineprotected

Use the current threading policy to determine the next thread to decode from.

Definition at line 1658 of file execute.cc.

References Minor::LSQ::canRequest(), commitPriority, cpu, executeInfo, Minor::LSQ::findResponse(), Minor::SelfStallingPipeline< ElemType, ReportTraits, BubbleTraits >::front(), PowerISA::fu, funcUnits, Minor::Execute::ExecuteThreadInfo::inFlightInsts, Minor::Execute::ExecuteThreadInfo::inFUMemInsts, Minor::QueuedInst::inst, InvalidThreadID, lsq, noCostFUIndex, panic, MinorCPU::randomPriority(), MinorCPU::roundRobinPriority(), and MinorCPU::threadPolicy.

Referenced by evaluate().

MinorCPU::MinorCPUPort & Minor::Execute::getDcachePort

(

)

Returns the DcachePort owned by this Execute to pass upwards.

Definition at line 1861 of file execute.cc.

References Minor::LSQ::getDcachePort(), and lsq.

Referenced by Minor::Pipeline::getDataPort().

const ForwardInstData * Minor::Execute::getInput ( ThreadID  tid )

protected

Get a piece of data to work on from the inputBuffer, or 0 if there is no data.

Definition at line 194 of file execute.cc.

References inputBuffer, and Minor::ForwardInstData::isBubble().

Referenced by evaluate(), getIssuingThread(), and issue().

ThreadID Minor::Execute::getIssuingThread ( )

inlineprotected

Definition at line 1725 of file execute.cc.

References cpu, getInput(), InvalidThreadID, issuePriority, panic, MinorCPU::randomPriority(), MinorCPU::roundRobinPriority(), and MinorCPU::threadPolicy.

Referenced by evaluate().

LSQ& Minor::Execute::getLSQ ( )

inline

To allow ExecContext to find the LSQ.

Definition at line 331 of file execute.hh.

References lsq.

Referenced by Minor::ExecContext::initiateMemRead(), and Minor::ExecContext::writeMem().

void Minor::Execute::handleMemResponse ( MinorDynInstPtr  inst, LSQ::LSQRequestPtr  response, BranchData &  branch, Fault &  fault  )

protected

Handle extracting mem ref responses from the memory queues and completing the associated instructions.

Fault is an output and will contain any fault caused (and already invoked by the function) Sets branch to any branch generated by the instruction.

Definition at line 320 of file execute.cc.

References cpu, doInstCommitAccounting(), DPRINTF, fatal, Minor::LSQ::LSQRequest::fault, Packet::getAddr(), Packet::getConstPtr(), Packet::getSize(), Packet::isError(), lsq, Minor::LSQ::LSQRequest::needsToBeSentToStoreBuffer(), NoFault, Minor::LSQ::LSQRequest::packet, Minor::LSQ::popResponse(), Minor::ExecContext::readPredicate(), Minor::LSQ::sendStoreToStoreBuffer(), MinorCPU::threads, and tryToBranch().

Referenced by commit().

bool Minor::Execute::hasInterrupt ( ThreadID  thread_id )

protected

Checks if a specific thread has an interrupt.

No action is taken. this is used for determining if a thread should only commit microops

Definition at line 1614 of file execute.cc.

References cpu, executeInfo, FullSystem, isInterrupted(), and NotDraining.

Referenced by evaluate().

bool Minor::Execute::instIsHeadInst

(

MinorDynInstPtr

inst

)

Returns true if the given instruction is at the head of the inFlightInsts instruction queue.

Definition at line 1850 of file execute.cc.

References executeInfo.

Referenced by Minor::LSQ::tryToSendToTransfers().

bool Minor::Execute::instIsRightStream

(

MinorDynInstPtr

inst

)

Does the given instruction have the right stream sequence number to be committed?

Definition at line 1844 of file execute.cc.

References executeInfo.

Referenced by Minor::LSQ::tryToSendToTransfers().

bool Minor::Execute::isDrained

(

)

After thread suspension, has Execute been drained of in-flight instructions and memory accesses.

Definition at line 1818 of file execute.cc.

References cpu, executeInfo, inputBuffer, Minor::LSQ::isDrained(), and lsq.

Referenced by drain(), and Minor::Pipeline::isDrained().

bool Minor::Execute::isInbetweenInsts ( ThreadID  thread_id ) const

protected

Are we between instructions? Can we be interrupted?

Definition at line 1386 of file execute.cc.

References Minor::LSQ::accessesInFlight(), executeInfo, and lsq.

Referenced by checkInterrupts(), commit(), drain(), evaluate(), and minorTrace().

bool Minor::Execute::isInterrupted ( ThreadID  thread_id ) const

protected

Has an interrupt been raised.

Definition at line 408 of file execute.cc.

References cpu.

Referenced by checkInterrupts(), commitInst(), and hasInterrupt().

unsigned int Minor::Execute::issue ( ThreadID  thread_id )

protected

Try and issue instructions from the inputBuffer.

Definition at line 523 of file execute.cc.

References ActivityRecorder::activity(), MinorCPU::activityRecorder, allowEarlyMemIssue, Minor::SelfStallingPipeline< ElemType, ReportTraits, BubbleTraits >::alreadyPushed(), Minor::FUPipeline::canInsert(), Minor::FUPipeline::cantForwardFromFUIndices, cpu, curTick(), Minor::FUPipeline::cyclesBeforeInsert(), Minor::FUPipeline::description, DPRINTF, DTRACE, executeInfo, MinorFUTiming::extraAssumedLat, MinorFUTiming::extraCommitLat, MinorFUTiming::extraCommitLatExpr, Minor::FUPipeline::findTiming(), PowerISA::fu, funcUnits, getInput(), Minor::LSQ::getLastMemBarrier(), Minor::Execute::ExecuteThreadInfo::inFlightInsts, Minor::Execute::ExecuteThreadInfo::inFUMemInsts, Minor::Execute::ExecuteThreadInfo::inputIndex, Minor::ForwardInstData::insts, Minor::LSQ::issuedMemBarrierInst(), issueLimit, lsq, memoryIssueLimit, noCostFUIndex, numFuncUnits, MinorFU::opLat, popInput(), processMoreThanOneInput, FuncUnit::provides(), Minor::SelfStallingPipeline< ElemType, ReportTraits, BubbleTraits >::push(), scoreboard, setTraceTimeOnIssue, MinorFUTiming::srcRegsRelativeLats, Minor::SelfStallingPipeline< ElemType, ReportTraits, BubbleTraits >::stalled, Minor::Execute::ExecuteThreadInfo::streamSeqNum, MinorFUTiming::suppress, ThreadContext::Suspended, and Minor::ForwardInstData::width().

Referenced by evaluate().

void Minor::Execute::minorTrace

(

)

const

Definition at line 1625 of file execute.cc.

References executeInfo, funcUnits, ArmISA::i, inputBuffer, isInbetweenInsts(), lsq, MINORTRACE, Minor::MinorBuffer< ElemType, ReportTraits >::minorTrace(), Minor::LSQ::minorTrace(), numFuncUnits, and scoreboard.

Referenced by Minor::Pipeline::minorTrace().

void Minor::Execute::popInput ( ThreadID  tid )

protected

Pop an element off the input buffer, if there are any.

Definition at line 207 of file execute.cc.

References executeInfo, and inputBuffer.

Referenced by evaluate(), and issue().

void Minor::Execute::setDrainState ( ThreadID  thread_id, DrainState  state  )

protected

Set the drain state (with useful debugging messages)

Definition at line 1789 of file execute.cc.

References DPRINTF, and executeInfo.

Referenced by drain(), drainResume(), and evaluate().

bool Minor::Execute::takeInterrupt ( ThreadID  thread_id, BranchData &  branch  )

protected

Act on an interrupt.

Returns true if an interrupt was actually signalled and invoked

Definition at line 414 of file execute.cc.

References Minor::LSQ::accessesInFlight(), Minor::MinorDynInst::bubble(), cpu, DPRINTF, interrupt, Minor::BranchData::Interrupt, lsq, NoFault, and updateBranchData().

Referenced by checkInterrupts().

bool Minor::Execute::tryPCEvents ( ThreadID  thread_id )

protected

Try to act on PC-related events.

Returns true if any were executed

Definition at line 815 of file execute.cc.

References cpu, DPRINTF, ThreadContext::instAddr(), and ThreadContext::pcState().

Referenced by commit().

void Minor::Execute::tryToBranch ( MinorDynInstPtr  inst, Fault  fault, BranchData &  branch  )

protected

Generate Branch data based (into branch) on an observed (or not) change in PC while executing an instruction.

Also handles branch prediction information within the inst.

Definition at line 216 of file execute.cc.

References AlphaISA::advancePC(), Minor::BranchData::BadlyPredictedBranch, Minor::BranchData::BadlyPredictedBranchTarget, Minor::BranchData::CorrectlyPredictedBranch, cpu, DPRINTF, Minor::BranchData::NoBranch, NoFault, ThreadContext::pcState(), ThreadContext::status(), ThreadContext::Suspended, Minor::BranchData::UnpredictedBranch, and updateBranchData().

Referenced by commitInst(), and handleMemResponse().

void Minor::Execute::updateBranchData ( ThreadID  tid, BranchData::Reason  reason, MinorDynInstPtr  inst, const TheISA::PCState &  target, BranchData &  branch  )

protected

Actually create a branch to communicate to Fetch1/Fetch2 and, if that is a stream-changing branch update the streamSeqNum.

Definition at line 294 of file execute.cc.

References DPRINTF, executeInfo, Minor::BranchData::isStreamChange(), and Minor::BranchData::NoBranch.

Referenced by commit(), commitInst(), evaluate(), takeInterrupt(), and tryToBranch().

Friends And Related Function Documentation

std::ostream& operator<< ( std::ostream &  os, Execute::DrainState  state  )

friend

Definition at line 1764 of file execute.cc.

Member Data Documentation

bool Minor::Execute::allowEarlyMemIssue

protected

Allow mem refs to leave their FUs before reaching the head of the in flight insts queue if their dependencies are met.

Definition at line 109 of file execute.hh.

Referenced by issue().

unsigned int Minor::Execute::commitLimit

protected

Number of instructions that can be committed per cycle.

Definition at line 81 of file execute.hh.

Referenced by commit(), and Execute().

ThreadID Minor::Execute::commitPriority

protected

Definition at line 204 of file execute.hh.

Referenced by getCommittingThread().

MinorCPU& Minor::Execute::cpu

protected

Pointer back to the containing CPU.

Definition at line 72 of file execute.hh.

Referenced by checkInterrupts(), commit(), commitInst(), doInstCommitAccounting(), drain(), drainResume(), evaluate(), Execute(), executeMemRefInst(), getCommittingThread(), getIssuingThread(), handleMemResponse(), hasInterrupt(), isDrained(), isInterrupted(), issue(), takeInterrupt(), tryPCEvents(), tryToBranch(), and ~Execute().

std::vector<ExecuteThreadInfo> Minor::Execute::executeInfo

protected

Definition at line 200 of file execute.hh.

Referenced by checkInterrupts(), commit(), commitInst(), drain(), evaluate(), Execute(), getCommittingThread(), hasInterrupt(), instIsHeadInst(), instIsRightStream(), isDrained(), isInbetweenInsts(), issue(), minorTrace(), popInput(), setDrainState(), updateBranchData(), and ~Execute().

MinorFUPool& Minor::Execute::fuDescriptions

protected

Descriptions of the functional units we want to generate.

Definition at line 92 of file execute.hh.

Referenced by Execute().

std::vector<FUPipeline *> Minor::Execute::funcUnits

protected

The execution functional units.

Definition at line 122 of file execute.hh.

Referenced by commit(), evaluate(), Execute(), getCommittingThread(), issue(), minorTrace(), and ~Execute().

Latch<ForwardInstData>::Output Minor::Execute::inp

protected

Input port carrying instructions from Decode.

Definition at line 66 of file execute.hh.

Referenced by evaluate().

std::vector<InputBuffer<ForwardInstData> > Minor::Execute::inputBuffer

Definition at line 125 of file execute.hh.

Referenced by evaluate(), Execute(), getInput(), isDrained(), minorTrace(), and popInput().

ThreadID Minor::Execute::interruptPriority

protected

Definition at line 202 of file execute.hh.

Referenced by checkInterrupts().

unsigned int Minor::Execute::issueLimit

protected

Number of instructions that can be issued per cycle.

Definition at line 75 of file execute.hh.

Referenced by Execute(), and issue().

ThreadID Minor::Execute::issuePriority

protected

Definition at line 203 of file execute.hh.

Referenced by getIssuingThread().

Cycles Minor::Execute::longestFuLatency

protected

Longest latency of any FU, useful for setting up the activity recoder.

Definition at line 99 of file execute.hh.

LSQ Minor::Execute::lsq

protected

Dcache port to pass on to the CPU.

Execute owns this

Definition at line 116 of file execute.hh.

Referenced by commit(), commitInst(), evaluate(), executeMemRefInst(), getCommittingThread(), getDcachePort(), getLSQ(), handleMemResponse(), isDrained(), isInbetweenInsts(), issue(), minorTrace(), and takeInterrupt().

unsigned int Minor::Execute::memoryCommitLimit

protected

Number of memory instructions that can be committed per cycle.

Definition at line 84 of file execute.hh.

Referenced by commit(), and Execute().

unsigned int Minor::Execute::memoryIssueLimit

protected

Number of memory ops that can be issued per cycle.

Definition at line 78 of file execute.hh.

Referenced by Execute(), and issue().

unsigned int Minor::Execute::noCostFUIndex

protected

The FU index of the non-existent costless FU for instructions which pass the MinorDynInst::isNoCostInst test.

Definition at line 113 of file execute.hh.

Referenced by commit(), getCommittingThread(), and issue().

unsigned int Minor::Execute::numFuncUnits

protected

Number of functional units to produce.

Definition at line 95 of file execute.hh.

Referenced by evaluate(), Execute(), issue(), minorTrace(), and ~Execute().

Latch<BranchData>::Input Minor::Execute::out

protected

Input port carrying stream changes to Fetch1.

Definition at line 69 of file execute.hh.

Referenced by evaluate().

bool Minor::Execute::processMoreThanOneInput

protected

If true, more than one input line can be processed each cycle if there is room to execute more instructions than taken from the first line.

Definition at line 89 of file execute.hh.

Referenced by issue().

std::vector<Scoreboard> Minor::Execute::scoreboard

protected

Scoreboard of instruction dependencies.

Definition at line 119 of file execute.hh.

Referenced by commit(), evaluate(), Execute(), issue(), and minorTrace().

bool Minor::Execute::setTraceTimeOnCommit

protected

Modify instruction trace times on commit.

Definition at line 102 of file execute.hh.

Referenced by commit().

bool Minor::Execute::setTraceTimeOnIssue

protected

Modify instruction trace times on issue.

Definition at line 105 of file execute.hh.

Referenced by issue().

---

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

• cpu/minor/execute.hh
• cpu/minor/execute.cc