gem5::MinorFUTiming Class Reference

Extra timing capability to allow individual ops to have their source register dependency latencies tweaked based on the ExtMachInst of the source instruction. More...

#include <func_unit.hh>

Inheritance diagram for gem5::MinorFUTiming:

Public Member Functions
	MinorFUTiming (const MinorFUTimingParams &params)
bool	provides (OpClass op_class)
	Does the extra decode in this object support the given op class.
Public Member Functions inherited from gem5::SimObject
const Params &	params () const
	SimObject (const Params &p)
virtual	~SimObject ()
virtual void	init ()
	init() is called after all C++ SimObjects have been created and all ports are connected.
virtual void	loadState (CheckpointIn &cp)
	loadState() is called on each SimObject when restoring from a checkpoint.
virtual void	initState ()
	initState() is called on each SimObject when not restoring from a checkpoint.
virtual void	regProbePoints ()
	Register probe points for this object.
virtual void	regProbeListeners ()
	Register probe listeners for this object.
ProbeManager *	getProbeManager ()
	Get the probe manager for this object.
virtual Port &	getPort (const std::string &if_name, PortID idx=InvalidPortID)
	Get a port with a given name and index.
virtual void	startup ()
	startup() is the final initialization call before simulation.
DrainState	drain () override
	Provide a default implementation of the drain interface for objects that don't need draining.
virtual void	memWriteback ()
	Write back dirty buffers to memory using functional writes.
virtual void	memInvalidate ()
	Invalidate the contents of memory buffers.
void	serialize (CheckpointOut &cp) const override
	Serialize an object.
void	unserialize (CheckpointIn &cp) override
	Unserialize an object.
Public Member Functions inherited from gem5::EventManager
EventQueue *	eventQueue () const
void	schedule (Event &event, Tick when)
void	deschedule (Event &event)
void	reschedule (Event &event, Tick when, bool always=false)
void	schedule (Event *event, Tick when)
void	deschedule (Event *event)
void	reschedule (Event *event, Tick when, bool always=false)
void	wakeupEventQueue (Tick when=(Tick) -1)
	This function is not needed by the usual gem5 event loop but may be necessary in derived EventQueues which host gem5 on other schedulers.
void	setCurTick (Tick newVal)
	EventManager (EventManager &em)
	Event manger manages events in the event queue.
	EventManager (EventManager *em)
	EventManager (EventQueue *eq)
Public Member Functions inherited from gem5::Serializable
	Serializable ()
virtual	~Serializable ()
void	serializeSection (CheckpointOut &cp, const char *name) const
	Serialize an object into a new section.
void	serializeSection (CheckpointOut &cp, const std::string &name) const
void	unserializeSection (CheckpointIn &cp, const char *name)
	Unserialize an a child object.
void	unserializeSection (CheckpointIn &cp, const std::string &name)
Public Member Functions inherited from gem5::Drainable
DrainState	drainState () const
	Return the current drain state of an object.
virtual void	notifyFork ()
	Notify a child process of a fork.
Public Member Functions inherited from gem5::statistics::Group
	Group (Group *parent, const char *name=nullptr)
	Construct a new statistics group.
virtual	~Group ()
virtual void	regStats ()
	Callback to set stat parameters.
virtual void	resetStats ()
	Callback to reset stats.
virtual void	preDumpStats ()
	Callback before stats are dumped.
void	addStat (statistics::Info *info)
	Register a stat with this group.
const std::map< std::string, Group * > &	getStatGroups () const
	Get all child groups associated with this object.
const std::vector< Info * > &	getStats () const
	Get all stats associated with this object.
void	addStatGroup (const char *name, Group *block)
	Add a stat block as a child of this block.
const Info *	resolveStat (std::string name) const
	Resolve a stat by its name within this group.
void	mergeStatGroup (Group *block)
	Merge the contents (stats & children) of a block to this block.
	Group ()=delete
	Group (const Group &)=delete
Group &	operator= (const Group &)=delete
Public Member Functions inherited from gem5::Named
	Named (const std::string &name_)
virtual	~Named ()=default
virtual std::string	name () const

Public Attributes
uint64_t	mask
	Mask off the ExtMachInst of an instruction before comparing with match.
uint64_t	match
std::string	description
	Textual description of the decode's purpose.
bool	suppress
	If true, instructions matching this mask/match should not be issued in this FU.
Cycles	extraCommitLat
	Extra latency that the instruction should spend at the end of the pipeline.
TimingExpr *	extraCommitLatExpr
Cycles	extraAssumedLat
	Extra delay that results should show in the scoreboard after leaving the pipeline.
std::vector< Cycles >	srcRegsRelativeLats
	Cycle offsets from the scoreboard delivery times of register values for each of this instruction's source registers (in srcRegs order).
MinorOpClassSet *	opClasses
	Extra opClasses check (after the FU one)

Additional Inherited Members
Public Types inherited from gem5::SimObject
typedef SimObjectParams	Params
Static Public Member Functions inherited from gem5::SimObject
static void	serializeAll (const std::string &cpt_dir)
	Create a checkpoint by serializing all SimObjects in the system.
static SimObject *	find (const char *name)
	Find the SimObject with the given name and return a pointer to it.
static void	setSimObjectResolver (SimObjectResolver *resolver)
	There is a single object name resolver, and it is only set when simulation is restoring from checkpoints.
static SimObjectResolver *	getSimObjectResolver ()
	There is a single object name resolver, and it is only set when simulation is restoring from checkpoints.
Static Public Member Functions inherited from gem5::Serializable
static const std::string &	currentSection ()
	Gets the fully-qualified name of the active section.
static void	generateCheckpointOut (const std::string &cpt_dir, std::ofstream &outstream)
	Generate a checkpoint file so that the serialization can be routed to it.
Protected Member Functions inherited from gem5::Drainable
	Drainable ()
virtual	~Drainable ()
virtual void	drainResume ()
	Resume execution after a successful drain.
void	signalDrainDone () const
	Signal that an object is drained.
Protected Attributes inherited from gem5::SimObject
const SimObjectParams &	_params
	Cached copy of the object parameters.
Protected Attributes inherited from gem5::EventManager
EventQueue *	eventq
	A pointer to this object's event queue.

Detailed Description

Extra timing capability to allow individual ops to have their source register dependency latencies tweaked based on the ExtMachInst of the source instruction.

Definition at line 103 of file func_unit.hh.

Constructor & Destructor Documentation

MinorFUTiming()

gem5::MinorFUTiming::MinorFUTiming

(

const MinorFUTimingParams &

params

)

Definition at line 63 of file func_unit.cc.

Member Function Documentation

provides()

bool gem5::MinorFUTiming::provides ( OpClass op_class )

inline

Does the extra decode in this object support the given op class.

Definition at line 146 of file func_unit.hh.

References opClasses, and gem5::MinorOpClassSet::provides().

Referenced by gem5::minor::FUPipeline::findTiming().

Member Data Documentation

description

std::string gem5::MinorFUTiming::description

Textual description of the decode's purpose.

Definition at line 112 of file func_unit.hh.

Referenced by gem5::minor::FUPipeline::findTiming().

extraAssumedLat

Cycles gem5::MinorFUTiming::extraAssumedLat

Extra delay that results should show in the scoreboard after leaving the pipeline.

If set to Cycles(0) for memory references, an 'unpredictable' return time will be set in the scoreboard blocking following dependent instructions from issuing

Definition at line 127 of file func_unit.hh.

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

extraCommitLat

Cycles gem5::MinorFUTiming::extraCommitLat

Extra latency that the instruction should spend at the end of the pipeline.

Definition at line 120 of file func_unit.hh.

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

extraCommitLatExpr

TimingExpr* gem5::MinorFUTiming::extraCommitLatExpr

Definition at line 121 of file func_unit.hh.

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

mask

uint64_t gem5::MinorFUTiming::mask

Mask off the ExtMachInst of an instruction before comparing with match.

Definition at line 108 of file func_unit.hh.

Referenced by gem5::minor::FUPipeline::findTiming(), and gem5::minor::FUPipeline::FUPipeline().

match

uint64_t gem5::MinorFUTiming::match

Definition at line 109 of file func_unit.hh.

Referenced by gem5::minor::FUPipeline::findTiming(), and gem5::minor::FUPipeline::FUPipeline().

opClasses

MinorOpClassSet* gem5::MinorFUTiming::opClasses

Extra opClasses check (after the FU one)

Definition at line 139 of file func_unit.hh.

Referenced by provides().

srcRegsRelativeLats

std::vector<Cycles> gem5::MinorFUTiming::srcRegsRelativeLats

Cycle offsets from the scoreboard delivery times of register values for each of this instruction's source registers (in srcRegs order).

The offsets are subtracted from the scoreboard returnCycle times. For example, for an instruction type with 3 source registers, [2, 1, 2] will allow the instruction to issue upto 2 cycles early for dependencies on the 1st and 3rd register and upto 1 cycle early on the 2nd.

Definition at line 136 of file func_unit.hh.

Referenced by gem5::minor::FUPipeline::FUPipeline(), and gem5::minor::Execute::issue().

suppress

bool gem5::MinorFUTiming::suppress

If true, instructions matching this mask/match should not be issued in this FU.

Definition at line 116 of file func_unit.hh.

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

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

• cpu/minor/func_unit.hh
• cpu/minor/func_unit.cc