DefaultIEW handles both single threaded and SMT IEW (issue/execute/writeback). More...

#include <iew.hh>

Classes
struct	IEWStats

Public Types
enum	Status { Active, Inactive }
	Overall IEW stage status. More...

enum	StageStatus { Running, Blocked, Idle, StartSquash, Squashing, Unblocking }
	Status for Issue, Execute, and Writeback stages. More...

Public Member Functions
	DefaultIEW (O3CPU *_cpu, const DerivO3CPUParams &params)
	Constructs a DefaultIEW with the given parameters. More...

std::string	name () const
	Returns the name of the DefaultIEW stage. More...

void	regProbePoints ()
	Registers probes. More...

void	startupStage ()
	Initializes stage; sends back the number of free IQ and LSQ entries. More...

void	clearStates (ThreadID tid)
	Clear all thread-specific states. More...

void	setTimeBuffer (TimeBuffer< TimeStruct > *tb_ptr)
	Sets main time buffer used for backwards communication. More...

void	setRenameQueue (TimeBuffer< RenameStruct > *rq_ptr)
	Sets time buffer for getting instructions coming from rename. More...

void	setIEWQueue (TimeBuffer< IEWStruct > *iq_ptr)
	Sets time buffer to pass on instructions to commit. More...

void	setActiveThreads (std::list< ThreadID > *at_ptr)
	Sets pointer to list of active threads. More...

void	setScoreboard (Scoreboard *sb_ptr)
	Sets pointer to the scoreboard. More...

void	drainSanityCheck () const
	Perform sanity checks after a drain. More...

bool	isDrained () const
	Has the stage drained? More...

void	takeOverFrom ()
	Takes over from another CPU's thread. More...

void	squash (ThreadID tid)
	Squashes instructions in IEW for a specific thread. More...

void	wakeDependents (const DynInstPtr &inst)
	Wakes all dependents of a completed instruction. More...

void	rescheduleMemInst (const DynInstPtr &inst)
	Tells memory dependence unit that a memory instruction needs to be rescheduled. More...

void	replayMemInst (const DynInstPtr &inst)
	Re-executes all rescheduled memory instructions. More...

void	blockMemInst (const DynInstPtr &inst)
	Moves memory instruction onto the list of cache blocked instructions. More...

void	cacheUnblocked ()
	Notifies that the cache has become unblocked. More...

void	instToCommit (const DynInstPtr &inst)
	Sends an instruction to commit through the time buffer. More...

void	skidInsert (ThreadID tid)
	Inserts unused instructions of a thread into the skid buffer. More...

int	skidCount ()
	Returns the max of the number of entries in all of the skid buffers. More...

bool	skidsEmpty ()
	Returns if all of the skid buffers are empty. More...

void	updateStatus ()
	Updates overall IEW status based on all of the stages' statuses. More...

void	resetEntries ()
	Resets entries of the IQ and the LSQ. More...

void	wakeCPU ()
	Tells the CPU to wakeup if it has descheduled itself due to no activity. More...

void	activityThisCycle ()
	Reports to the CPU that there is activity this cycle. More...

void	activateStage ()
	Tells CPU that the IEW stage is active and running. More...

void	deactivateStage ()
	Tells CPU that the IEW stage is inactive and idle. More...

bool	hasStoresToWB ()
	Returns if the LSQ has any stores to writeback. More...

bool	hasStoresToWB (ThreadID tid)
	Returns if the LSQ has any stores to writeback. More...

void	checkMisprediction (const DynInstPtr &inst)
	Check misprediction More...

void	setLastRetiredHtmUid (ThreadID tid, uint64_t htmUid)

void	tick ()
	Ticks IEW stage, causing Dispatch, the IQ, the LSQ, Execute, and Writeback to run for one cycle. More...

Public Attributes
IQ	instQueue
	Instruction queue. More...

LSQ	ldstQueue
	Load / store queue. More...

FUPool *	fuPool
	Pointer to the functional unit pool. More...

bool	updateLSQNextCycle
	Records if the LSQ needs to be updated on the next cycle, so that IEW knows if there will be activity on the next cycle. More...

Private Types
typedef Impl::CPUPol	CPUPol

typedef Impl::DynInstPtr	DynInstPtr

typedef Impl::O3CPU	O3CPU

typedef CPUPol::IQ	IQ

typedef CPUPol::RenameMap	RenameMap

typedef CPUPol::LSQ	LSQ

typedef CPUPol::TimeStruct	TimeStruct

typedef CPUPol::IEWStruct	IEWStruct

typedef CPUPol::RenameStruct	RenameStruct

typedef CPUPol::IssueStruct	IssueStruct

Private Member Functions
void	squashDueToBranch (const DynInstPtr &inst, ThreadID tid)
	Sends commit proper information for a squash due to a branch mispredict. More...

void	squashDueToMemOrder (const DynInstPtr &inst, ThreadID tid)
	Sends commit proper information for a squash due to a memory order violation. More...

void	block (ThreadID tid)
	Sets Dispatch to blocked, and signals back to other stages to block. More...

void	unblock (ThreadID tid)
	Unblocks Dispatch if the skid buffer is empty, and signals back to other stages to unblock. More...

void	dispatch (ThreadID tid)
	Determines proper actions to take given Dispatch's status. More...

void	dispatchInsts (ThreadID tid)
	Dispatches instructions to IQ and LSQ. More...

void	executeInsts ()
	Executes instructions. More...

void	writebackInsts ()
	Writebacks instructions. More...

unsigned	validInstsFromRename ()
	Returns the number of valid, non-squashed instructions coming from rename to dispatch. More...

bool	checkStall (ThreadID tid)
	Checks if any of the stall conditions are currently true. More...

void	checkSignalsAndUpdate (ThreadID tid)
	Processes inputs and changes state accordingly. More...

void	emptyRenameInsts (ThreadID tid)
	Removes instructions from rename from a thread's instruction list. More...

void	sortInsts ()
	Sorts instructions coming from rename into lists separated by thread. More...

void	updateExeInstStats (const DynInstPtr &inst)
	Updates execution stats based on the instruction. More...

void	printAvailableInsts ()
	Debug function to print instructions that are issued this cycle. More...

Private Attributes
Status	_status
	Overall stage status. More...

StageStatus	dispatchStatus [Impl::MaxThreads]
	Dispatch status. More...

StageStatus	exeStatus
	Execute status. More...

StageStatus	wbStatus
	Writeback status. More...

ProbePointArg< DynInstPtr > *	ppMispredict
	Probe points. More...

ProbePointArg< DynInstPtr > *	ppDispatch

ProbePointArg< DynInstPtr > *	ppExecute
	To probe when instruction execution begins. More...

ProbePointArg< DynInstPtr > *	ppToCommit
	To probe when instruction execution is complete. More...

TimeBuffer< TimeStruct > *	timeBuffer
	Pointer to main time buffer used for backwards communication. More...

TimeBuffer< TimeStruct >::wire	toFetch
	Wire to write information heading to previous stages. More...

TimeBuffer< TimeStruct >::wire	fromCommit
	Wire to get commit's output from backwards time buffer. More...

TimeBuffer< TimeStruct >::wire	toRename
	Wire to write information heading to previous stages. More...

TimeBuffer< RenameStruct > *	renameQueue
	Rename instruction queue interface. More...

TimeBuffer< RenameStruct >::wire	fromRename
	Wire to get rename's output from rename queue. More...

TimeBuffer< IssueStruct >	issueToExecQueue
	Issue stage queue. More...

TimeBuffer< IssueStruct >::wire	fromIssue
	Wire to read information from the issue stage time queue. More...

TimeBuffer< IEWStruct > *	iewQueue
	IEW stage time buffer. More...

TimeBuffer< IEWStruct >::wire	toCommit
	Wire to write infromation heading to commit. More...

std::queue< DynInstPtr >	insts [Impl::MaxThreads]
	Queue of all instructions coming from rename this cycle. More...

std::queue< DynInstPtr >	skidBuffer [Impl::MaxThreads]
	Skid buffer between rename and IEW. More...

Scoreboard *	scoreboard
	Scoreboard pointer. More...

O3CPU *	cpu
	CPU pointer. More...

bool	wroteToTimeBuffer
	Records if IEW has written to the time buffer this cycle, so that the CPU can deschedule itself if there is no activity. More...

bool	fetchRedirect [Impl::MaxThreads]
	Records if there is a fetch redirect on this cycle for each thread. More...

bool	updatedQueues
	Records if the queues have been changed (inserted or issued insts), so that IEW knows to broadcast the updated amount of free entries. More...

Cycles	commitToIEWDelay
	Commit to IEW delay. More...

Cycles	renameToIEWDelay
	Rename to IEW delay. More...

Cycles	issueToExecuteDelay
	Issue to execute delay. More...

unsigned	dispatchWidth
	Width of dispatch, in instructions. More...

unsigned	issueWidth
	Width of issue, in instructions. More...

unsigned	wbNumInst
	Index into queue of instructions being written back. More...

unsigned	wbCycle
	Cycle number within the queue of instructions being written back. More...

unsigned	wbWidth
	Writeback width. More...

ThreadID	numThreads
	Number of active threads. More...

std::list< ThreadID > *	activeThreads
	Pointer to list of active threads. More...

unsigned	skidBufferMax
	Maximum size of the skid buffer. More...

DefaultIEW::IEWStats	iewStats

Detailed Description

template<class Impl>
class DefaultIEW< Impl >

DefaultIEW handles both single threaded and SMT IEW (issue/execute/writeback).

It handles the dispatching of instructions to the LSQ/IQ as part of the issue stage, and has the IQ try to issue instructions each cycle. The execute latency is actually tied into the issue latency to allow the IQ to be able to do back-to-back scheduling without having to speculatively schedule instructions. This happens by having the IQ have access to the functional units, and the IQ gets the execution latencies from the FUs when it issues instructions. Instructions reach the execute stage on the last cycle of their execution, which is when the IQ knows to wake up any dependent instructions, allowing back to back scheduling. The execute portion of IEW separates memory instructions from non-memory instructions, either telling the LSQ to execute the instruction, or executing the instruction directly. The writeback portion of IEW completes the instructions by waking up any dependents, and marking the register ready on the scoreboard.

Definition at line 78 of file iew.hh.

Member Typedef Documentation

◆ CPUPol

template<class Impl >

typedef Impl::CPUPol DefaultIEW< Impl >::CPUPol

private

Definition at line 82 of file iew.hh.

◆ DynInstPtr

template<class Impl >

typedef Impl::DynInstPtr DefaultIEW< Impl >::DynInstPtr

private

Definition at line 83 of file iew.hh.

◆ IEWStruct

template<class Impl >

typedef CPUPol::IEWStruct DefaultIEW< Impl >::IEWStruct

private

Definition at line 91 of file iew.hh.

◆ IQ

template<class Impl >

typedef CPUPol::IQ DefaultIEW< Impl >::IQ

private

Definition at line 86 of file iew.hh.

◆ IssueStruct

template<class Impl >

typedef CPUPol::IssueStruct DefaultIEW< Impl >::IssueStruct

private

Definition at line 93 of file iew.hh.

◆ LSQ

template<class Impl >

typedef CPUPol::LSQ DefaultIEW< Impl >::LSQ

private

Definition at line 88 of file iew.hh.

◆ O3CPU

template<class Impl >

typedef Impl::O3CPU DefaultIEW< Impl >::O3CPU

private

Definition at line 84 of file iew.hh.

◆ RenameMap

template<class Impl >

typedef CPUPol::RenameMap DefaultIEW< Impl >::RenameMap

private

Definition at line 87 of file iew.hh.

◆ RenameStruct

template<class Impl >

typedef CPUPol::RenameStruct DefaultIEW< Impl >::RenameStruct

private

Definition at line 92 of file iew.hh.

◆ TimeStruct

template<class Impl >

typedef CPUPol::TimeStruct DefaultIEW< Impl >::TimeStruct

private

Definition at line 90 of file iew.hh.

Member Enumeration Documentation

◆ StageStatus

template<class Impl >

enum DefaultIEW::StageStatus

Status for Issue, Execute, and Writeback stages.

Enumerator
Running
Blocked
Idle
StartSquash
Squashing
Unblocking

Definition at line 105 of file iew.hh.

◆ Status

template<class Impl >

enum DefaultIEW::Status

Overall IEW stage status.

Used to determine if the CPU can deschedule itself due to a lack of activity.

Enumerator
Active
Inactive

Definition at line 99 of file iew.hh.

Constructor & Destructor Documentation

◆ DefaultIEW()

template<class Impl >

DefaultIEW< Impl >::DefaultIEW	(	O3CPU *	_cpu,
		const DerivO3CPUParams &	params
	)

Member Function Documentation

◆ activateStage()

template<class Impl >

void DefaultIEW< Impl >::activateStage

inline

Tells CPU that the IEW stage is active and running.

Definition at line 848 of file iew_impl.hh.

References DefaultIEW< Impl >::cpu, and DPRINTF.

Referenced by DefaultIEW< Impl >::updateStatus().

◆ activityThisCycle()

template<class Impl >

void DefaultIEW< Impl >::activityThisCycle

Reports to the CPU that there is activity this cycle.

Definition at line 840 of file iew_impl.hh.

References DefaultIEW< Impl >::cpu, and DPRINTF.

Referenced by DefaultIEW< Impl >::executeInsts().

◆ block()

template<class Impl >

void DefaultIEW< Impl >::block ( ThreadID tid )

private

Sets Dispatch to blocked, and signals back to other stages to block.

Definition at line 503 of file iew_impl.hh.

References DefaultIEW< Impl >::Blocked, DefaultIEW< Impl >::dispatchStatus, DPRINTF, DefaultIEW< Impl >::skidInsert(), DefaultIEW< Impl >::toRename, DefaultIEW< Impl >::Unblocking, and DefaultIEW< Impl >::wroteToTimeBuffer.

Referenced by DefaultIEW< Impl >::checkSignalsAndUpdate(), and DefaultIEW< Impl >::dispatchInsts().

◆ blockMemInst()

template<class Impl >

void DefaultIEW< Impl >::blockMemInst ( const DynInstPtr & inst )

Moves memory instruction onto the list of cache blocked instructions.

Definition at line 560 of file iew_impl.hh.

References DefaultIEW< Impl >::instQueue.

◆ cacheUnblocked()

template<class Impl >

void DefaultIEW< Impl >::cacheUnblocked

Notifies that the cache has become unblocked.

Definition at line 567 of file iew_impl.hh.

References DefaultIEW< Impl >::instQueue.

◆ checkMisprediction()

template<class Impl >

void DefaultIEW< Impl >::checkMisprediction ( const DynInstPtr & inst )

Check misprediction

Definition at line 1631 of file iew_impl.hh.

References DPRINTF, DefaultIEW< Impl >::fetchRedirect, DefaultIEW< Impl >::iewStats, DefaultIEW< Impl >::IEWStats::predictedNotTakenIncorrect, DefaultIEW< Impl >::IEWStats::predictedTakenIncorrect, DefaultIEW< Impl >::squashDueToBranch(), and DefaultIEW< Impl >::toCommit.

◆ checkSignalsAndUpdate()

template<class Impl >

void DefaultIEW< Impl >::checkSignalsAndUpdate ( ThreadID tid )

private

Processes inputs and changes state accordingly.

Definition at line 733 of file iew_impl.hh.

References DefaultIEW< Impl >::block(), DefaultIEW< Impl >::Blocked, DefaultIEW< Impl >::checkStall(), DefaultIEW< Impl >::dispatchStatus, DPRINTF, DefaultIEW< Impl >::emptyRenameInsts(), DefaultIEW< Impl >::fetchRedirect, DefaultIEW< Impl >::fromCommit, DefaultIEW< Impl >::Running, DefaultIEW< Impl >::squash(), DefaultIEW< Impl >::Squashing, DefaultIEW< Impl >::toRename, DefaultIEW< Impl >::unblock(), DefaultIEW< Impl >::Unblocking, and DefaultIEW< Impl >::wroteToTimeBuffer.

Referenced by DefaultIEW< Impl >::tick().

◆ checkStall()

template<class Impl >

bool DefaultIEW< Impl >::checkStall ( ThreadID tid )

private

Checks if any of the stall conditions are currently true.

Definition at line 716 of file iew_impl.hh.

References DPRINTF, DefaultIEW< Impl >::fromCommit, and DefaultIEW< Impl >::instQueue.

Referenced by DefaultIEW< Impl >::checkSignalsAndUpdate().

◆ clearStates()

template<class Impl >

void DefaultIEW< Impl >::clearStates ( ThreadID tid )

Clear all thread-specific states.

Definition at line 279 of file iew_impl.hh.

References DefaultIEW< Impl >::instQueue, DefaultIEW< Impl >::ldstQueue, LSQ< Impl >::numFreeLoadEntries(), LSQ< Impl >::numFreeStoreEntries(), and DefaultIEW< Impl >::toRename.

◆ deactivateStage()

template<class Impl >

void DefaultIEW< Impl >::deactivateStage

inline

Tells CPU that the IEW stage is inactive and idle.

Definition at line 856 of file iew_impl.hh.

References DefaultIEW< Impl >::cpu, and DPRINTF.

Referenced by DefaultIEW< Impl >::updateStatus().

◆ dispatch()

template<class Impl >

void DefaultIEW< Impl >::dispatch ( ThreadID tid )

private

Determines proper actions to take given Dispatch's status.

Definition at line 864 of file iew_impl.hh.

Referenced by DefaultIEW< Impl >::tick().

◆ dispatchInsts()

template<class Impl >

void DefaultIEW< Impl >::dispatchInsts ( ThreadID tid )

private

Dispatches instructions to IQ and LSQ.

Definition at line 912 of file iew_impl.hh.

Referenced by DefaultIEW< Impl >::dispatch().

◆ drainSanityCheck()

template<class Impl >

void DefaultIEW< Impl >::drainSanityCheck

Perform sanity checks after a drain.

Definition at line 376 of file iew_impl.hh.

References LSQ< Impl >::drainSanityCheck(), DefaultIEW< Impl >::instQueue, DefaultIEW< Impl >::isDrained(), and DefaultIEW< Impl >::ldstQueue.

◆ emptyRenameInsts()

template<class Impl >

void DefaultIEW< Impl >::emptyRenameInsts ( ThreadID tid )

private

Removes instructions from rename from a thread's instruction list.

Definition at line 811 of file iew_impl.hh.

References DPRINTF, DefaultIEW< Impl >::insts, and DefaultIEW< Impl >::toRename.

Referenced by DefaultIEW< Impl >::checkSignalsAndUpdate(), and DefaultIEW< Impl >::squash().

◆ executeInsts()

template<class Impl >

void DefaultIEW< Impl >::executeInsts

private

Executes instructions.

In the case of memory operations, it informs the LSQ to execute the instructions. Also handles any redirects that occur due to the executed instructions.

Definition at line 1172 of file iew_impl.hh.

Referenced by DefaultIEW< Impl >::tick().

◆ hasStoresToWB() [1/2]

template<class Impl >

bool DefaultIEW< Impl >::hasStoresToWB ( )

inline

Returns if the LSQ has any stores to writeback.

Definition at line 225 of file iew.hh.

References LSQ< Impl >::hasStoresToWB(), and DefaultIEW< Impl >::ldstQueue.

◆ hasStoresToWB() [2/2]

template<class Impl >

bool DefaultIEW< Impl >::hasStoresToWB ( ThreadID tid )

inline

Returns if the LSQ has any stores to writeback.

Definition at line 228 of file iew.hh.

References LSQ< Impl >::hasStoresToWB(), and DefaultIEW< Impl >::ldstQueue.

◆ instToCommit()

template<class Impl >

void DefaultIEW< Impl >::instToCommit ( const DynInstPtr & inst )

Sends an instruction to commit through the time buffer.

Definition at line 574 of file iew_impl.hh.

References DPRINTF, DefaultIEW< Impl >::iewQueue, DefaultIEW< Impl >::insts, DefaultIEW< Impl >::wbCycle, DefaultIEW< Impl >::wbNumInst, and DefaultIEW< Impl >::wbWidth.

Referenced by DefaultIEW< Impl >::executeInsts().

◆ isDrained()

template<class Impl >

bool DefaultIEW< Impl >::isDrained

Has the stage drained?

Definition at line 347 of file iew_impl.hh.

References DefaultIEW< Impl >::dispatchStatus, DPRINTF, DefaultIEW< Impl >::fuPool, DefaultIEW< Impl >::instQueue, DefaultIEW< Impl >::insts, FUPool::isDrained(), LSQ< Impl >::isDrained(), DefaultIEW< Impl >::ldstQueue, DefaultIEW< Impl >::numThreads, DefaultIEW< Impl >::Running, and DefaultIEW< Impl >::skidBuffer.

Referenced by DefaultIEW< Impl >::drainSanityCheck().

◆ name()

template<class Impl >

std::string DefaultIEW< Impl >::name

Returns the name of the DefaultIEW stage.

Definition at line 116 of file iew_impl.hh.

◆ printAvailableInsts()

template<class Impl >

void DefaultIEW< Impl >::printAvailableInsts

private

Debug function to print instructions that are issued this cycle.

Definition at line 1149 of file iew_impl.hh.

References DefaultIEW< Impl >::fromIssue.

◆ regProbePoints()

template<class Impl >

void DefaultIEW< Impl >::regProbePoints

Registers probes.

Probe point with dynamic instruction as the argument used to probe when an instruction starts to execute.

Probe point with dynamic instruction as the argument used to probe when an instruction execution completes and it is marked ready to commit.

Definition at line 123 of file iew_impl.hh.

◆ replayMemInst()

template<class Impl >

void DefaultIEW< Impl >::replayMemInst ( const DynInstPtr & inst )

Re-executes all rescheduled memory instructions.

Definition at line 553 of file iew_impl.hh.

References DefaultIEW< Impl >::instQueue.

◆ rescheduleMemInst()

template<class Impl >

void DefaultIEW< Impl >::rescheduleMemInst ( const DynInstPtr & inst )

Tells memory dependence unit that a memory instruction needs to be rescheduled.

It will re-execute once replayMemInst() is called.

Definition at line 546 of file iew_impl.hh.

References DefaultIEW< Impl >::instQueue.

◆ resetEntries()

template<class Impl >

void DefaultIEW< Impl >::resetEntries ( )

Resets entries of the IQ and the LSQ.

◆ setActiveThreads()

template<class Impl >

void DefaultIEW< Impl >::setActiveThreads ( std::list< ThreadID > * at_ptr )

Sets pointer to list of active threads.

Definition at line 330 of file iew_impl.hh.

References DefaultIEW< Impl >::activeThreads, DefaultIEW< Impl >::instQueue, DefaultIEW< Impl >::ldstQueue, and LSQ< Impl >::setActiveThreads().

◆ setIEWQueue()

template<class Impl >

void DefaultIEW< Impl >::setIEWQueue ( TimeBuffer< IEWStruct > * iq_ptr )

Sets time buffer to pass on instructions to commit.

Definition at line 320 of file iew_impl.hh.

References TimeBuffer< T >::getWire(), DefaultIEW< Impl >::iewQueue, and DefaultIEW< Impl >::toCommit.

◆ setLastRetiredHtmUid()

template<class Impl >

void DefaultIEW< Impl >::setLastRetiredHtmUid	(	ThreadID	tid,
		uint64_t	htmUid
	)

inline

Definition at line 238 of file iew.hh.

References DefaultIEW< Impl >::ldstQueue, and LSQ< Impl >::setLastRetiredHtmUid().

◆ setRenameQueue()

template<class Impl >

void DefaultIEW< Impl >::setRenameQueue ( TimeBuffer< RenameStruct > * rq_ptr )

Sets time buffer for getting instructions coming from rename.

Definition at line 310 of file iew_impl.hh.

References DefaultIEW< Impl >::fromRename, TimeBuffer< T >::getWire(), DefaultIEW< Impl >::renameQueue, and DefaultIEW< Impl >::renameToIEWDelay.

◆ setScoreboard()

template<class Impl >

void DefaultIEW< Impl >::setScoreboard ( Scoreboard * sb_ptr )

Sets pointer to the scoreboard.

Definition at line 340 of file iew_impl.hh.

References DefaultIEW< Impl >::scoreboard.

◆ setTimeBuffer()

template<class Impl >

void DefaultIEW< Impl >::setTimeBuffer ( TimeBuffer< TimeStruct > * tb_ptr )

Sets main time buffer used for backwards communication.

Definition at line 292 of file iew_impl.hh.

References DefaultIEW< Impl >::commitToIEWDelay, DefaultIEW< Impl >::fromCommit, TimeBuffer< T >::getWire(), DefaultIEW< Impl >::instQueue, DefaultIEW< Impl >::timeBuffer, DefaultIEW< Impl >::toFetch, and DefaultIEW< Impl >::toRename.

◆ skidCount()

template<class Impl >

int DefaultIEW< Impl >::skidCount

Returns the max of the number of entries in all of the skid buffers.

Definition at line 639 of file iew_impl.hh.

References DefaultIEW< Impl >::activeThreads, and DefaultIEW< Impl >::skidBuffer.

◆ skidInsert()

template<class Impl >

void DefaultIEW< Impl >::skidInsert ( ThreadID tid )

Inserts unused instructions of a thread into the skid buffer.

Definition at line 617 of file iew_impl.hh.

References DPRINTF, DefaultIEW< Impl >::insts, DefaultIEW< Impl >::skidBuffer, and DefaultIEW< Impl >::skidBufferMax.

Referenced by DefaultIEW< Impl >::block(), and DefaultIEW< Impl >::dispatch().

◆ skidsEmpty()

template<class Impl >

bool DefaultIEW< Impl >::skidsEmpty

Returns if all of the skid buffers are empty.

Definition at line 658 of file iew_impl.hh.

References DefaultIEW< Impl >::activeThreads, and DefaultIEW< Impl >::skidBuffer.

Referenced by DefaultIEW< Impl >::dispatch().

◆ sortInsts()

template<class Impl >

void DefaultIEW< Impl >::sortInsts

private

Sorts instructions coming from rename into lists separated by thread.

Definition at line 797 of file iew_impl.hh.

References DefaultIEW< Impl >::fromRename, ArmISA::i, DefaultIEW< Impl >::insts, DefaultIEW< Impl >::numThreads, and TimeBuffer< T >::size.

Referenced by DefaultIEW< Impl >::tick().

◆ squash()

template<class Impl >

void DefaultIEW< Impl >::squash ( ThreadID tid )

Squashes instructions in IEW for a specific thread.

Definition at line 414 of file iew_impl.hh.

References DPRINTF, DefaultIEW< Impl >::emptyRenameInsts(), DefaultIEW< Impl >::fromCommit, DefaultIEW< Impl >::instQueue, DefaultIEW< Impl >::ldstQueue, DefaultIEW< Impl >::skidBuffer, LSQ< Impl >::squash(), DefaultIEW< Impl >::toRename, and DefaultIEW< Impl >::updatedQueues.

Referenced by DefaultIEW< Impl >::checkSignalsAndUpdate().

◆ squashDueToBranch()

template<class Impl >

void DefaultIEW< Impl >::squashDueToBranch	(	const DynInstPtr &	inst,
		ThreadID	tid
	)

private

Sends commit proper information for a squash due to a branch mispredict.

Definition at line 450 of file iew_impl.hh.

References ArmISA::advancePC(), DPRINTF, MipsISA::pc, DefaultIEW< Impl >::toCommit, and DefaultIEW< Impl >::wroteToTimeBuffer.

Referenced by DefaultIEW< Impl >::checkMisprediction(), and DefaultIEW< Impl >::executeInsts().

◆ squashDueToMemOrder()

template<class Impl >

void DefaultIEW< Impl >::squashDueToMemOrder	(	const DynInstPtr &	inst,
		ThreadID	tid
	)

private

Sends commit proper information for a squash due to a memory order violation.

Definition at line 476 of file iew_impl.hh.

References DPRINTF, DefaultIEW< Impl >::toCommit, and DefaultIEW< Impl >::wroteToTimeBuffer.

Referenced by DefaultIEW< Impl >::executeInsts().

◆ startupStage()

template<class Impl >

void DefaultIEW< Impl >::startupStage

Initializes stage; sends back the number of free IQ and LSQ entries.

Definition at line 257 of file iew_impl.hh.

References DefaultIEW< Impl >::cpu, LSQ< Impl >::getDataPort(), DefaultIEW< Impl >::instQueue, DefaultIEW< Impl >::ldstQueue, LSQ< Impl >::numFreeLoadEntries(), LSQ< Impl >::numFreeStoreEntries(), DefaultIEW< Impl >::numThreads, and DefaultIEW< Impl >::toRename.

Referenced by DefaultIEW< Impl >::takeOverFrom().

◆ takeOverFrom()

template<class Impl >

void DefaultIEW< Impl >::takeOverFrom

◆ tick()

template<class Impl >

void DefaultIEW< Impl >::tick

Ticks IEW stage, causing Dispatch, the IQ, the LSQ, Execute, and Writeback to run for one cycle.

Definition at line 1469 of file iew_impl.hh.

◆ unblock()

template<class Impl >

void DefaultIEW< Impl >::unblock ( ThreadID tid )

private

Unblocks Dispatch if the skid buffer is empty, and signals back to other stages to unblock.

Definition at line 522 of file iew_impl.hh.

References DefaultIEW< Impl >::dispatchStatus, DPRINTF, DefaultIEW< Impl >::Running, DefaultIEW< Impl >::skidBuffer, DefaultIEW< Impl >::toRename, and DefaultIEW< Impl >::wroteToTimeBuffer.

Referenced by DefaultIEW< Impl >::checkSignalsAndUpdate(), and DefaultIEW< Impl >::dispatch().

◆ updateExeInstStats()

template<class Impl >

void DefaultIEW< Impl >::updateExeInstStats ( const DynInstPtr & inst )

private

Updates execution stats based on the instruction.

Definition at line 1599 of file iew_impl.hh.

References curTick(), DTRACE, DefaultIEW< Impl >::IEWStats::executedInstStats, DefaultIEW< Impl >::iewStats, DefaultIEW< Impl >::IEWStats::ExecutedInstStats::numBranches, DefaultIEW< Impl >::IEWStats::ExecutedInstStats::numInsts, DefaultIEW< Impl >::IEWStats::ExecutedInstStats::numLoadInsts, and DefaultIEW< Impl >::IEWStats::ExecutedInstStats::numRefs.

Referenced by DefaultIEW< Impl >::executeInsts().

◆ updateStatus()

template<class Impl >

void DefaultIEW< Impl >::updateStatus

Updates overall IEW status based on all of the stages' statuses.

Definition at line 675 of file iew_impl.hh.

References DefaultIEW< Impl >::_status, DefaultIEW< Impl >::activateStage(), DefaultIEW< Impl >::Active, DefaultIEW< Impl >::activeThreads, DefaultIEW< Impl >::deactivateStage(), DefaultIEW< Impl >::dispatchStatus, DPRINTF, DefaultIEW< Impl >::Inactive, DefaultIEW< Impl >::instQueue, DefaultIEW< Impl >::ldstQueue, DefaultIEW< Impl >::Unblocking, and LSQ< Impl >::willWB().

Referenced by DefaultIEW< Impl >::tick().

◆ validInstsFromRename()

template<class Impl >

unsigned DefaultIEW< Impl >::validInstsFromRename

private

Returns the number of valid, non-squashed instructions coming from rename to dispatch.

Definition at line 603 of file iew_impl.hh.

References DefaultIEW< Impl >::fromRename, ArmISA::i, and TimeBuffer< T >::size.

Referenced by DefaultIEW< Impl >::dispatch().

◆ wakeCPU()

template<class Impl >

void DefaultIEW< Impl >::wakeCPU

Tells the CPU to wakeup if it has descheduled itself due to no activity.

Used mainly by the LdWritebackEvent.

Definition at line 833 of file iew_impl.hh.

References DefaultIEW< Impl >::cpu.

◆ wakeDependents()

template<class Impl >

void DefaultIEW< Impl >::wakeDependents ( const DynInstPtr & inst )

Wakes all dependents of a completed instruction.

Definition at line 539 of file iew_impl.hh.

References DefaultIEW< Impl >::instQueue.

◆ writebackInsts()

template<class Impl >

void DefaultIEW< Impl >::writebackInsts

private

Writebacks instructions.

In our model, the instruction's execute() function atomically reads registers, executes, and writes registers. Thus this writeback only wakes up dependent instructions, and informs the scoreboard of registers becoming ready.

Definition at line 1419 of file iew_impl.hh.

References DefaultIEW< Impl >::IEWStats::consumerInst, DPRINTF, ArmISA::i, DefaultIEW< Impl >::iewStats, DefaultIEW< Impl >::instQueue, DefaultIEW< Impl >::IEWStats::instsToCommit, NoFault, ProbePointArg< Arg >::notify(), DefaultIEW< Impl >::ppToCommit, DefaultIEW< Impl >::IEWStats::producerInst, DefaultIEW< Impl >::scoreboard, Scoreboard::setReg(), DefaultIEW< Impl >::toCommit, DefaultIEW< Impl >::wbWidth, and DefaultIEW< Impl >::IEWStats::writebackCount.

Referenced by DefaultIEW< Impl >::tick().

Member Data Documentation

◆ _status

template<class Impl >

Status DefaultIEW< Impl >::_status

private

Overall stage status.

Definition at line 116 of file iew.hh.

Referenced by DefaultIEW< Impl >::DefaultIEW(), DefaultIEW< Impl >::takeOverFrom(), and DefaultIEW< Impl >::updateStatus().

◆ activeThreads

template<class Impl >

std::list<ThreadID>* DefaultIEW< Impl >::activeThreads

private

Pointer to list of active threads.

Definition at line 421 of file iew.hh.

Referenced by DefaultIEW< Impl >::executeInsts(), DefaultIEW< Impl >::setActiveThreads(), DefaultIEW< Impl >::skidCount(), DefaultIEW< Impl >::skidsEmpty(), DefaultIEW< Impl >::tick(), and DefaultIEW< Impl >::updateStatus().

◆ commitToIEWDelay

template<class Impl >

Cycles DefaultIEW< Impl >::commitToIEWDelay

private

Commit to IEW delay.

Definition at line 386 of file iew.hh.

Referenced by DefaultIEW< Impl >::setTimeBuffer().

◆ cpu

template<class Impl >

O3CPU* DefaultIEW< Impl >::cpu

private

CPU pointer.

Definition at line 352 of file iew.hh.

Referenced by DefaultIEW< Impl >::activateStage(), DefaultIEW< Impl >::activityThisCycle(), DefaultIEW< Impl >::deactivateStage(), DefaultIEW< Impl >::IEWStats::ExecutedInstStats::ExecutedInstStats(), DefaultIEW< Impl >::executeInsts(), DefaultIEW< Impl >::IEWStats::IEWStats(), DefaultIEW< Impl >::startupStage(), DefaultIEW< Impl >::takeOverFrom(), DefaultIEW< Impl >::tick(), and DefaultIEW< Impl >::wakeCPU().

◆ dispatchStatus

template<class Impl >

StageStatus DefaultIEW< Impl >::dispatchStatus[Impl::MaxThreads]

private

Dispatch status.

Definition at line 118 of file iew.hh.

Referenced by DefaultIEW< Impl >::block(), DefaultIEW< Impl >::checkSignalsAndUpdate(), DefaultIEW< Impl >::DefaultIEW(), DefaultIEW< Impl >::dispatch(), DefaultIEW< Impl >::dispatchInsts(), DefaultIEW< Impl >::isDrained(), DefaultIEW< Impl >::takeOverFrom(), DefaultIEW< Impl >::unblock(), and DefaultIEW< Impl >::updateStatus().

◆ dispatchWidth

template<class Impl >

unsigned DefaultIEW< Impl >::dispatchWidth

private

Width of dispatch, in instructions.

Definition at line 399 of file iew.hh.

Referenced by DefaultIEW< Impl >::DefaultIEW(), and DefaultIEW< Impl >::dispatchInsts().

◆ exeStatus

template<class Impl >

StageStatus DefaultIEW< Impl >::exeStatus

private

Execute status.

Definition at line 120 of file iew.hh.

Referenced by DefaultIEW< Impl >::DefaultIEW(), DefaultIEW< Impl >::executeInsts(), DefaultIEW< Impl >::takeOverFrom(), and DefaultIEW< Impl >::tick().

◆ fetchRedirect

template<class Impl >

bool DefaultIEW< Impl >::fetchRedirect[Impl::MaxThreads]

private

Records if there is a fetch redirect on this cycle for each thread.

Definition at line 378 of file iew.hh.

Referenced by DefaultIEW< Impl >::checkMisprediction(), DefaultIEW< Impl >::checkSignalsAndUpdate(), DefaultIEW< Impl >::DefaultIEW(), DefaultIEW< Impl >::executeInsts(), and DefaultIEW< Impl >::takeOverFrom().

◆ fromCommit

template<class Impl >

TimeBuffer<TimeStruct>::wire DefaultIEW< Impl >::fromCommit

private

Wire to get commit's output from backwards time buffer.

Definition at line 315 of file iew.hh.

Referenced by DefaultIEW< Impl >::checkSignalsAndUpdate(), DefaultIEW< Impl >::checkStall(), DefaultIEW< Impl >::setTimeBuffer(), DefaultIEW< Impl >::squash(), and DefaultIEW< Impl >::tick().

◆ fromIssue

template<class Impl >

TimeBuffer<IssueStruct>::wire DefaultIEW< Impl >::fromIssue

private

Wire to read information from the issue stage time queue.

Definition at line 330 of file iew.hh.

Referenced by DefaultIEW< Impl >::DefaultIEW(), DefaultIEW< Impl >::executeInsts(), and DefaultIEW< Impl >::printAvailableInsts().

◆ fromRename

template<class Impl >

TimeBuffer<RenameStruct>::wire DefaultIEW< Impl >::fromRename

private

Wire to get rename's output from rename queue.

Definition at line 324 of file iew.hh.

Referenced by DefaultIEW< Impl >::setRenameQueue(), DefaultIEW< Impl >::sortInsts(), and DefaultIEW< Impl >::validInstsFromRename().

◆ fuPool

template<class Impl >

FUPool* DefaultIEW< Impl >::fuPool

Pointer to the functional unit pool.

Definition at line 370 of file iew.hh.

Referenced by DefaultIEW< Impl >::isDrained(), DefaultIEW< Impl >::takeOverFrom(), and DefaultIEW< Impl >::tick().

◆ iewQueue

template<class Impl >

TimeBuffer<IEWStruct>* DefaultIEW< Impl >::iewQueue

private

IEW stage time buffer.

Holds ROB indices of instructions that can be marked as completed.

Definition at line 336 of file iew.hh.

Referenced by DefaultIEW< Impl >::instToCommit(), and DefaultIEW< Impl >::setIEWQueue().

◆ iewStats

template<class Impl >

DefaultIEW::IEWStats DefaultIEW< Impl >::iewStats

private

Referenced by DefaultIEW< Impl >::checkMisprediction(), DefaultIEW< Impl >::dispatch(), DefaultIEW< Impl >::dispatchInsts(), DefaultIEW< Impl >::executeInsts(), DefaultIEW< Impl >::updateExeInstStats(), and DefaultIEW< Impl >::writebackInsts().

◆ instQueue

template<class Impl >

IQ DefaultIEW< Impl >::instQueue

◆ insts

template<class Impl >

std::queue<DynInstPtr> DefaultIEW< Impl >::insts[Impl::MaxThreads]

private

Queue of all instructions coming from rename this cycle.

Definition at line 342 of file iew.hh.

Referenced by DefaultIEW< Impl >::dispatchInsts(), DefaultIEW< Impl >::emptyRenameInsts(), DefaultIEW< Impl >::instToCommit(), DefaultIEW< Impl >::isDrained(), DefaultIEW< Impl >::skidInsert(), and DefaultIEW< Impl >::sortInsts().

◆ issueToExecQueue

template<class Impl >

TimeBuffer<IssueStruct> DefaultIEW< Impl >::issueToExecQueue

private

Issue stage queue.

Definition at line 327 of file iew.hh.

Referenced by DefaultIEW< Impl >::DefaultIEW(), DefaultIEW< Impl >::takeOverFrom(), and DefaultIEW< Impl >::tick().

◆ issueToExecuteDelay

template<class Impl >

Cycles DefaultIEW< Impl >::issueToExecuteDelay

private

Issue to execute delay.

What this actually represents is the amount of time it takes for an instruction to wake up, be scheduled, and sent to a FU for execution.

Definition at line 396 of file iew.hh.

Referenced by DefaultIEW< Impl >::DefaultIEW().

◆ issueWidth

template<class Impl >

unsigned DefaultIEW< Impl >::issueWidth

private

Width of issue, in instructions.

Definition at line 402 of file iew.hh.

Referenced by DefaultIEW< Impl >::DefaultIEW().

◆ ldstQueue

template<class Impl >

LSQ DefaultIEW< Impl >::ldstQueue

Load / store queue.

Definition at line 367 of file iew.hh.

Referenced by DefaultIEW< Impl >::clearStates(), DefaultIEW< Impl >::dispatchInsts(), DefaultIEW< Impl >::drainSanityCheck(), DefaultIEW< Impl >::executeInsts(), DefaultIEW< Impl >::hasStoresToWB(), DefaultIEW< Impl >::isDrained(), DefaultIEW< Impl >::setActiveThreads(), DefaultIEW< Impl >::setLastRetiredHtmUid(), DefaultIEW< Impl >::squash(), DefaultIEW< Impl >::startupStage(), DefaultIEW< Impl >::takeOverFrom(), DefaultIEW< Impl >::tick(), and DefaultIEW< Impl >::updateStatus().

◆ numThreads

template<class Impl >

ThreadID DefaultIEW< Impl >::numThreads

private

Number of active threads.

Definition at line 418 of file iew.hh.

Referenced by DefaultIEW< Impl >::isDrained(), DefaultIEW< Impl >::sortInsts(), DefaultIEW< Impl >::startupStage(), and DefaultIEW< Impl >::takeOverFrom().

◆ ppDispatch

template<class Impl >

ProbePointArg<DynInstPtr>* DefaultIEW< Impl >::ppDispatch

private

Definition at line 126 of file iew.hh.

Referenced by DefaultIEW< Impl >::dispatchInsts().

◆ ppExecute

template<class Impl >

ProbePointArg<DynInstPtr>* DefaultIEW< Impl >::ppExecute

private

To probe when instruction execution begins.

Definition at line 128 of file iew.hh.

Referenced by DefaultIEW< Impl >::executeInsts().

◆ ppMispredict

template<class Impl >

ProbePointArg<DynInstPtr>* DefaultIEW< Impl >::ppMispredict

private

Probe points.

Definition at line 125 of file iew.hh.

Referenced by DefaultIEW< Impl >::executeInsts().

◆ ppToCommit

template<class Impl >

ProbePointArg<DynInstPtr>* DefaultIEW< Impl >::ppToCommit

private

To probe when instruction execution is complete.

Definition at line 130 of file iew.hh.

Referenced by DefaultIEW< Impl >::writebackInsts().

◆ renameQueue

template<class Impl >

TimeBuffer<RenameStruct>* DefaultIEW< Impl >::renameQueue

private

Rename instruction queue interface.

Definition at line 321 of file iew.hh.

Referenced by DefaultIEW< Impl >::setRenameQueue().

◆ renameToIEWDelay

template<class Impl >

Cycles DefaultIEW< Impl >::renameToIEWDelay

private

Rename to IEW delay.

Definition at line 389 of file iew.hh.

Referenced by DefaultIEW< Impl >::DefaultIEW(), and DefaultIEW< Impl >::setRenameQueue().

◆ scoreboard

template<class Impl >

Scoreboard* DefaultIEW< Impl >::scoreboard

private

Scoreboard pointer.

Definition at line 348 of file iew.hh.

Referenced by DefaultIEW< Impl >::setScoreboard(), and DefaultIEW< Impl >::writebackInsts().

◆ skidBuffer

template<class Impl >

std::queue<DynInstPtr> DefaultIEW< Impl >::skidBuffer[Impl::MaxThreads]

private

Skid buffer between rename and IEW.

Definition at line 345 of file iew.hh.

Referenced by DefaultIEW< Impl >::dispatchInsts(), DefaultIEW< Impl >::isDrained(), DefaultIEW< Impl >::skidCount(), DefaultIEW< Impl >::skidInsert(), DefaultIEW< Impl >::skidsEmpty(), DefaultIEW< Impl >::squash(), and DefaultIEW< Impl >::unblock().

◆ skidBufferMax

template<class Impl >

unsigned DefaultIEW< Impl >::skidBufferMax

private

Maximum size of the skid buffer.

Definition at line 424 of file iew.hh.

Referenced by DefaultIEW< Impl >::DefaultIEW(), and DefaultIEW< Impl >::skidInsert().

◆ timeBuffer

template<class Impl >

TimeBuffer<TimeStruct>* DefaultIEW< Impl >::timeBuffer

private

Pointer to main time buffer used for backwards communication.

Definition at line 309 of file iew.hh.

Referenced by DefaultIEW< Impl >::setTimeBuffer().

◆ toCommit

template<class Impl >

TimeBuffer<IEWStruct>::wire DefaultIEW< Impl >::toCommit

private

Wire to write infromation heading to commit.

Definition at line 339 of file iew.hh.

Referenced by DefaultIEW< Impl >::checkMisprediction(), DefaultIEW< Impl >::executeInsts(), DefaultIEW< Impl >::setIEWQueue(), DefaultIEW< Impl >::squashDueToBranch(), DefaultIEW< Impl >::squashDueToMemOrder(), and DefaultIEW< Impl >::writebackInsts().

◆ toFetch

template<class Impl >

TimeBuffer<TimeStruct>::wire DefaultIEW< Impl >::toFetch

private

Wire to write information heading to previous stages.

Definition at line 312 of file iew.hh.

Referenced by DefaultIEW< Impl >::setTimeBuffer(), and DefaultIEW< Impl >::tick().

◆ toRename

template<class Impl >

TimeBuffer<TimeStruct>::wire DefaultIEW< Impl >::toRename

private

Wire to write information heading to previous stages.

Definition at line 318 of file iew.hh.

Referenced by DefaultIEW< Impl >::block(), DefaultIEW< Impl >::checkSignalsAndUpdate(), DefaultIEW< Impl >::clearStates(), DefaultIEW< Impl >::dispatchInsts(), DefaultIEW< Impl >::emptyRenameInsts(), DefaultIEW< Impl >::setTimeBuffer(), DefaultIEW< Impl >::squash(), DefaultIEW< Impl >::startupStage(), DefaultIEW< Impl >::tick(), and DefaultIEW< Impl >::unblock().

◆ updatedQueues

template<class Impl >

bool DefaultIEW< Impl >::updatedQueues

private

Records if the queues have been changed (inserted or issued insts), so that IEW knows to broadcast the updated amount of free entries.

Definition at line 383 of file iew.hh.

Referenced by DefaultIEW< Impl >::dispatchInsts(), DefaultIEW< Impl >::executeInsts(), DefaultIEW< Impl >::squash(), and DefaultIEW< Impl >::tick().

◆ updateLSQNextCycle

template<class Impl >

bool DefaultIEW< Impl >::updateLSQNextCycle

Records if the LSQ needs to be updated on the next cycle, so that IEW knows if there will be activity on the next cycle.

Definition at line 374 of file iew.hh.

Referenced by DefaultIEW< Impl >::DefaultIEW(), DefaultIEW< Impl >::takeOverFrom(), and DefaultIEW< Impl >::tick().

◆ wbCycle

template<class Impl >

unsigned DefaultIEW< Impl >::wbCycle

private

Cycle number within the queue of instructions being written back.

Used in case there are too many instructions writing back at the current cycle and writesbacks need to be scheduled for the future. See comments in instToCommit().

Definition at line 412 of file iew.hh.

Referenced by DefaultIEW< Impl >::executeInsts(), DefaultIEW< Impl >::instToCommit(), and DefaultIEW< Impl >::tick().

◆ wbNumInst

template<class Impl >

unsigned DefaultIEW< Impl >::wbNumInst

private

Index into queue of instructions being written back.

Definition at line 405 of file iew.hh.

Referenced by DefaultIEW< Impl >::executeInsts(), DefaultIEW< Impl >::instToCommit(), and DefaultIEW< Impl >::tick().

◆ wbStatus

template<class Impl >

StageStatus DefaultIEW< Impl >::wbStatus

private

Writeback status.

Definition at line 122 of file iew.hh.

Referenced by DefaultIEW< Impl >::DefaultIEW(), and DefaultIEW< Impl >::takeOverFrom().

◆ wbWidth

template<class Impl >

unsigned DefaultIEW< Impl >::wbWidth

private

Writeback width.

Definition at line 415 of file iew.hh.

Referenced by DefaultIEW< Impl >::DefaultIEW(), DefaultIEW< Impl >::instToCommit(), and DefaultIEW< Impl >::writebackInsts().

◆ wroteToTimeBuffer

template<class Impl >

bool DefaultIEW< Impl >::wroteToTimeBuffer

private

Records if IEW has written to the time buffer this cycle, so that the CPU can deschedule itself if there is no activity.

Definition at line 357 of file iew.hh.

Referenced by DefaultIEW< Impl >::block(), DefaultIEW< Impl >::checkSignalsAndUpdate(), DefaultIEW< Impl >::squashDueToBranch(), DefaultIEW< Impl >::squashDueToMemOrder(), DefaultIEW< Impl >::tick(), and DefaultIEW< Impl >::unblock().

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

cpu/o3/iew.hh
cpu/o3/iew_impl.hh

Classes

Public Types

Public Member Functions

Public Attributes

Private Types

Private Member Functions

Private Attributes

Detailed Description

template<class Impl> class DefaultIEW< Impl >

Member Typedef Documentation

◆ CPUPol

◆ DynInstPtr

◆ IEWStruct

◆ IQ

◆ IssueStruct

◆ LSQ

◆ O3CPU

◆ RenameMap

◆ RenameStruct

◆ TimeStruct

Member Enumeration Documentation

◆ StageStatus

◆ Status

Constructor & Destructor Documentation

◆ DefaultIEW()

Member Function Documentation

◆ activateStage()

◆ activityThisCycle()

◆ block()

◆ blockMemInst()

◆ cacheUnblocked()

◆ checkMisprediction()

◆ checkSignalsAndUpdate()

◆ checkStall()

◆ clearStates()

◆ deactivateStage()

◆ dispatch()

◆ dispatchInsts()

◆ drainSanityCheck()

◆ emptyRenameInsts()

◆ executeInsts()

◆ hasStoresToWB() [1/2]

◆ hasStoresToWB() [2/2]

◆ instToCommit()

◆ isDrained()

◆ name()

◆ printAvailableInsts()

◆ regProbePoints()

◆ replayMemInst()

◆ rescheduleMemInst()

◆ resetEntries()

◆ setActiveThreads()

◆ setIEWQueue()

◆ setLastRetiredHtmUid()

◆ setRenameQueue()

◆ setScoreboard()

◆ setTimeBuffer()

◆ skidCount()

◆ skidInsert()

◆ skidsEmpty()

◆ sortInsts()

◆ squash()

◆ squashDueToBranch()

◆ squashDueToMemOrder()

◆ startupStage()

◆ takeOverFrom()

◆ tick()

◆ unblock()

◆ updateExeInstStats()

◆ updateStatus()

◆ validInstsFromRename()

◆ wakeCPU()

◆ wakeDependents()

◆ writebackInsts()

Member Data Documentation

◆ _status

◆ activeThreads

◆ commitToIEWDelay

◆ cpu

◆ dispatchStatus

template<class Impl>
class DefaultIEW< Impl >