A functional unit configured from a MinorFU object. More...

#include <func_unit.hh>

Inheritance diagram for gem5::minor::FUPipeline:

Public Member Functions
	FUPipeline (const std::string &name, const MinorFU &description_, ClockedObject &timeSource_)

Cycles	cyclesBeforeInsert ()
	How many cycles must from curCycle before insertion into the pipeline is allowed.

bool	canInsert () const
	Can an instruction be inserted now?

MinorFUTiming *	findTiming (const StaticInstPtr &inst)
	Find the extra timing information for this instruction.

void	advance ()
	Step the pipeline.

Public Member Functions inherited from gem5::minor::SelfStallingPipeline< ElemType, ReportTraits, BubbleTraits >
	SelfStallingPipeline (const std::string &name, const std::string &data_name, unsigned depth)

void	push (ElemType &elem)
	Write an element to the back of the pipeline.

ElemType &	front ()
	Peek at the end element of the pipe.

const ElemType &	front () const

bool	alreadyPushed ()
	Have we already pushed onto this pipe without advancing.

bool	isPopable ()
	There's data (not a bubble) at the end of the pipe.

void	advance ()
	Try to advance the pipeline.

Public Member Functions inherited from gem5::minor::MinorBuffer< ElemType, ReportTraits >
	MinorBuffer (const std::string &name, const std::string &data_name, int num_past, int num_future, int report_left=-1, int report_right=-1)

bool	empty () const

void	minorTrace () const
	Report buffer states from 'slot' 'from' to 'to'.

Public Member Functions inherited from gem5::Named
	Named (const std::string &name_)

virtual	~Named ()=default

virtual std::string	name () const

Public Member Functions inherited from gem5::TimeBuffer< ElemType >
	TimeBuffer (int p, int f)

	TimeBuffer ()

	~TimeBuffer ()

void	id (int id)

int	id ()

void	advance ()

ElemType *	access (int idx)

ElemType &	operator[] (int idx)

const ElemType &	operator[] (int idx) const

wire	getWire (int idx)

wire	zero ()

unsigned	getSize ()

Public Member Functions inherited from gem5::FuncUnit
	FuncUnit ()

	FuncUnit (const FuncUnit &fu)

void	addCapability (OpClass cap, unsigned oplat, bool pipelined)

bool	provides (OpClass capability)

std::bitset< Num_OpClasses >	capabilities ()

unsigned &	opLatency (OpClass capability)

bool	isPipelined (OpClass capability)

Public Attributes
const MinorFU &	description
	Functional unit description that this pipeline implements.

ClockedObject &	timeSource
	An FUPipeline needs access to curCycle, use this timing source.

std::bitset< Num_OpClasses >	capabilityList
	Set of operation classes supported by this FU.

std::vector< bool >	cantForwardFromFUIndices
	FUs which this pipeline can't receive a forwarded (i.e.

Cycles	nextInsertCycle
	When can a new instruction be inserted into the pipeline? This is an absolute cycle time unless it is 0 in which case the an instruction can be pushed straightaway.

Public Attributes inherited from gem5::minor::SelfStallingPipeline< ElemType, ReportTraits, BubbleTraits >
bool	stalled
	If true, advance will not advance the pipeline.

unsigned int	occupancy
	The number of slots with non-bubbles in them.

Public Attributes inherited from gem5::FuncUnit
std::string	name

Additional Inherited Members
Protected Member Functions inherited from gem5::TimeBuffer< ElemType >
void	valid (int idx) const

int	calculateVectorIndex (int idx) const

Protected Attributes inherited from gem5::minor::SelfStallingPipeline< ElemType, ReportTraits, BubbleTraits >
TimeBuffer< ElemType >::wire	pushWire
	Wire at the input end of the pipeline (for convenience)

TimeBuffer< ElemType >::wire	popWire
	Wire at the output end of the pipeline (for convenience)

Protected Attributes inherited from gem5::minor::MinorBuffer< ElemType, ReportTraits >
int	reportLeft
	The range of elements that should appear in trace lines.

int	reportRight

std::string	dataName
	Name to use for the data in a MinorTrace line.

Protected Attributes inherited from gem5::TimeBuffer< ElemType >
int	past

int	future

unsigned	size

int	_id

char *	data

std::vector< char * >	index

unsigned	base

Detailed Description

A functional unit configured from a MinorFU object.

Definition at line 232 of file func_unit.hh.

Constructor & Destructor Documentation

◆ FUPipeline()

gem5::minor::FUPipeline::FUPipeline	(	const std::string &	name,
		const MinorFU &	description_,
		ClockedObject &	timeSource_ )

Definition at line 86 of file func_unit.cc.

References gem5::FuncUnit::addCapability(), cantForwardFromFUIndices, gem5::MinorFU::cantForwardFromFUIndices, description, DPRINTFS, gem5::ArmISA::i, gem5::MinorFUTiming::mask, gem5::MinorFUTiming::match, gem5::MinorFU::opClasses, gem5::MinorOpClassSet::opClasses, gem5::MinorFU::opLat, gem5::MinorFUTiming::srcRegsRelativeLats, and gem5::MinorFU::timings.

Member Function Documentation

◆ advance()

void gem5::minor::FUPipeline::advance ( )

Step the pipeline.

Allow multiple steps?

Definition at line 158 of file func_unit.cc.

References gem5::minor::SelfStallingPipeline< ElemType, ReportTraits, BubbleTraits >::advance(), gem5::minor::SelfStallingPipeline< ElemType, ReportTraits, BubbleTraits >::alreadyPushed(), gem5::Clocked::curCycle(), description, gem5::MinorFU::issueLat, nextInsertCycle, gem5::minor::SelfStallingPipeline< ElemType, ReportTraits, BubbleTraits >::stalled, and timeSource.

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

◆ canInsert()

bool gem5::minor::FUPipeline::canInsert ( ) const

Can an instruction be inserted now?

Definition at line 152 of file func_unit.cc.

References gem5::Clocked::curCycle(), nextInsertCycle, and timeSource.

◆ cyclesBeforeInsert()

Cycles gem5::minor::FUPipeline::cyclesBeforeInsert ( )

How many cycles must from curCycle before insertion into the pipeline is allowed.

Definition at line 143 of file func_unit.cc.

References gem5::Clocked::curCycle(), nextInsertCycle, and timeSource.

◆ findTiming()

MinorFUTiming * gem5::minor::FUPipeline::findTiming ( const StaticInstPtr & inst )

Find the extra timing information for this instruction.

Returns NULL if no decode info. is found

Definition at line 176 of file func_unit.cc.

References description, gem5::MinorFUTiming::description, gem5::StaticInst::disassemble(), DPRINTFS, gem5::StaticInst::getEMI(), gem5::ArmISA::i, gem5::MinorFUTiming::mask, gem5::MinorFUTiming::match, gem5::StaticInst::opClass(), gem5::MinorFUTiming::provides(), and gem5::MinorFU::timings.

Member Data Documentation

◆ cantForwardFromFUIndices

std::vector<bool> gem5::minor::FUPipeline::cantForwardFromFUIndices

FUs which this pipeline can't receive a forwarded (i.e.

relative latency != 0) result from

Definition at line 246 of file func_unit.hh.

Referenced by FUPipeline().

◆ capabilityList

std::bitset<Num_OpClasses> gem5::minor::FUPipeline::capabilityList

Set of operation classes supported by this FU.

Definition at line 242 of file func_unit.hh.

◆ description

const MinorFU& gem5::minor::FUPipeline::description

Functional unit description that this pipeline implements.

Definition at line 236 of file func_unit.hh.

Referenced by advance(), findTiming(), and FUPipeline().

◆ nextInsertCycle

Cycles gem5::minor::FUPipeline::nextInsertCycle

When can a new instruction be inserted into the pipeline? This is an absolute cycle time unless it is 0 in which case the an instruction can be pushed straightaway.

Definition at line 252 of file func_unit.hh.

Referenced by advance(), canInsert(), and cyclesBeforeInsert().

◆ timeSource

ClockedObject& gem5::minor::FUPipeline::timeSource

An FUPipeline needs access to curCycle, use this timing source.

Definition at line 239 of file func_unit.hh.