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/*
* Copyright (c) 2014-2015 Advanced Micro Devices, Inc.
* All rights reserved.
*
* For use for simulation and test purposes only
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Anthony Gutierrez,
* Sooraj Puthoor
*/
#include "gpu-compute/fetch_stage.hh"
#include "gpu-compute/compute_unit.hh"
#include "gpu-compute/wavefront.hh"
FetchStage::FetchStage(const ComputeUnitParams* p) : numSIMDs(p->num_SIMDs),
computeUnit(nullptr)
{
for (int j = 0; j < numSIMDs; ++j) {
FetchUnit newFetchUnit(p);
fetchUnit.push_back(newFetchUnit);
}
}
FetchStage::~FetchStage()
{
fetchUnit.clear();
}
void
FetchStage::init(ComputeUnit *cu)
{
computeUnit = cu;
_name = computeUnit->name() + ".FetchStage";
for (int j = 0; j < numSIMDs; ++j) {
fetchUnit[j].bindWaveList(&computeUnit->wfList[j]);
fetchUnit[j].init(computeUnit);
}
}
void
FetchStage::exec()
{
for (int j = 0; j < numSIMDs; ++j) {
fetchUnit[j].exec();
}
}
void
FetchStage::processFetchReturn(PacketPtr pkt)
{
ComputeUnit::SQCPort::SenderState *sender_state =
safe_cast<ComputeUnit::SQCPort::SenderState*>(pkt->senderState);
Wavefront *wavefront = sender_state->wavefront;
const unsigned num_instructions = pkt->req->getSize() /
sizeof(TheGpuISA::RawMachInst);
instFetchInstReturned.sample(num_instructions);
uint32_t simdId = wavefront->simdId;
fetchUnit[simdId].processFetchReturn(pkt);
}
void
FetchStage::fetch(PacketPtr pkt, Wavefront *wavefront)
{
fetchUnit[wavefront->simdId].fetch(pkt, wavefront);
}
void
FetchStage::regStats()
{
instFetchInstReturned
.init(1, 32, 1)
.name(name() + ".inst_fetch_instr_returned")
.desc("For each instruction fetch request recieved record how many "
"instructions you got from it")
;
}
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