#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 52 of file fetch_unit.hh.

Constructor & Destructor Documentation

FetchUnit::FetchUnit ( const ComputeUnitParams * params )

Definition at line 50 of file fetch_unit.cc.

FetchUnit::~FetchUnit ( )

Definition at line 58 of file fetch_unit.cc.

References fetchQueue, and fetchStatusQueue.

Member Function Documentation

void FetchUnit::bindWaveList ( std::vector< Wavefront * > * list )

Definition at line 312 of file fetch_unit.cc.

References waveList.

void FetchUnit::exec ( )

Definition at line 80 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.

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

Definition at line 205 of file fetch_unit.cc.

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

Referenced by initiateFetch().

void FetchUnit::init ( ComputeUnit * cu )

Definition at line 65 of file fetch_unit.cc.

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

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 114 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, X86ISA::size(), ComputeUnit::sqcTLBPort, ComputeUnit::ITLBPort::stallPort(), timingSim, MipsISA::vaddr, and Wavefront::wfSlotId.

Referenced by exec().

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 253 of file fetch_unit.cc.

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