FetchUnit Class Reference

#include <fetch_unit.hh>

Public Member Functions
	FetchUnit (const ComputeUnitParams *params)
	~FetchUnit ()
void	init (ComputeUnit *cu)
void	exec ()
void	bindWaveList (std::vector< Wavefront *> *list)
void	initiateFetch (Wavefront *wavefront)
void	fetch (PacketPtr pkt, Wavefront *wavefront)
void	processFetchReturn (PacketPtr pkt)

Static Public Attributes
static uint32_t	globalFetchUnitID

Private Attributes
bool	timingSim
ComputeUnit *	computeUnit
TheGpuISA::Decoder	decoder
Scheduler	fetchScheduler
std::vector< Wavefront * >	fetchQueue
std::vector< std::pair< Wavefront *, bool > >	fetchStatusQueue
std::vector< Wavefront * > *	waveList

Detailed Description

Definition at line 54 of file fetch_unit.hh.

Constructor & Destructor Documentation

FetchUnit()

FetchUnit::FetchUnit

(

const ComputeUnitParams *

params

)

Definition at line 52 of file fetch_unit.cc.

~FetchUnit()

FetchUnit::~FetchUnit

(

)

Definition at line 60 of file fetch_unit.cc.

References fetchQueue, and fetchStatusQueue.

Member Function Documentation

bindWaveList()

void FetchUnit::bindWaveList

(

std::vector< Wavefront *> *

list

)

Definition at line 314 of file fetch_unit.cc.

References waveList.

exec()

void FetchUnit::exec

(

)

Definition at line 82 of file fetch_unit.cc.

References Scheduler::chooseWave(), computeUnit, fetchQueue, fetchScheduler, fetchStatusQueue, initiateFetch(), Wavefront::instructionBuffer, Wavefront::instructionBufferHasBranch(), ArmISA::j, Shader::n_wf, Wavefront::pendingFetch, Wavefront::S_RUNNING, ComputeUnit::shader, Wavefront::status, and Wavefront::wfSlotId.

fetch()

void FetchUnit::fetch	(	PacketPtr	pkt,
		Wavefront *	wavefront
	)

Definition at line 208 of file fetch_unit.cc.

References computeUnit, ComputeUnit::cu_id, data, Packet::dataDynamic(), DPRINTF, processFetchReturn(), Packet::req, ComputeUnit::SQCPort::retries, Packet::senderState, MasterPort::sendFunctional(), MasterPort::sendTimingReq(), Wavefront::simdId, ComputeUnit::sqcPort, timingSim, and Wavefront::wfSlotId.

Referenced by initiateFetch().

init()

void FetchUnit::init

(

ComputeUnit *

cu

)

Definition at line 67 of file fetch_unit.cc.

References Scheduler::bindList(), computeUnit, fetchQueue, fetchScheduler, fetchStatusQueue, ArmISA::j, Shader::n_wf, ComputeUnit::shader, timingSim, Shader::timingSim, and waveList.

initiateFetch()

void FetchUnit::initiateFetch

(

Wavefront *

wavefront

)

the instruction buffer holds one instruction per entry, regardless of the underlying instruction's size. the PC, however, addresses instrutions on a 32b granularity so we must account for that here.

Definition at line 116 of file fetch_unit.cc.

References Wavefront::basePtr, ComputeUnit::cacheLineSize(), computeUnit, ComputeUnit::cu_id, DPRINTF, BaseTLB::Execute, fetch(), Shader::gpuTc, ArmISA::i, Request::INST_FETCH, Wavefront::instructionBuffer, ComputeUnit::ITLBPort::isStalled(), ComputeUnit::masterId(), Wavefront::pc(), MemCmd::ReadReq, ComputeUnit::ITLBPort::retries, roundDown(), safe_cast(), MasterPort::sendFunctional(), MasterPort::sendTimingReq(), ComputeUnit::shader, Wavefront::simdId, ComputeUnit::sqcTLBPort, ComputeUnit::ITLBPort::stallPort(), timingSim, MipsISA::vaddr, and Wavefront::wfSlotId.

Referenced by exec().

processFetchReturn()

void FetchUnit::processFetchReturn

(

PacketPtr

pkt

)

this instruction occupies 2 consecutive entries in the instruction array, the second of which contains a nullptr. so if this inst is 8 bytes we advance two entries instead of 1

Definition at line 256 of file fetch_unit.cc.

References computeUnit, ComputeUnit::cu_id, decoder, GPUStaticInst::disassemble(), DPRINTF, Packet::getPtr(), ArmISA::i, GPUStaticInst::instSize(), Packet::req, safe_cast(), Packet::senderState, and ComputeUnit::SQCPort::SenderState::wavefront.

Referenced by fetch().

Member Data Documentation

computeUnit

ComputeUnit* FetchUnit::computeUnit

private

Definition at line 69 of file fetch_unit.hh.

Referenced by exec(), fetch(), init(), initiateFetch(), and processFetchReturn().

decoder

TheGpuISA::Decoder FetchUnit::decoder

private

Definition at line 70 of file fetch_unit.hh.

Referenced by processFetchReturn().

fetchQueue

std::vector<Wavefront*> FetchUnit::fetchQueue

private

Definition at line 80 of file fetch_unit.hh.

Referenced by exec(), init(), and ~FetchUnit().

fetchScheduler

Scheduler FetchUnit::fetchScheduler

private

Definition at line 76 of file fetch_unit.hh.

Referenced by exec(), and init().

fetchStatusQueue

std::vector<std::pair<Wavefront*, bool> > FetchUnit::fetchStatusQueue

private

Definition at line 85 of file fetch_unit.hh.

Referenced by exec(), init(), and ~FetchUnit().

globalFetchUnitID

uint32_t FetchUnit::globalFetchUnitID

static

Definition at line 65 of file fetch_unit.hh.

timingSim

bool FetchUnit::timingSim

private

Definition at line 68 of file fetch_unit.hh.

Referenced by fetch(), init(), and initiateFetch().

waveList

std::vector<Wavefront*>* FetchUnit::waveList

private

Definition at line 88 of file fetch_unit.hh.

Referenced by bindWaveList(), and init().

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

• gpu-compute/fetch_unit.hh
• gpu-compute/fetch_unit.cc