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/*
* Copyright (c) 2016, 2017 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.
*
* Author: Mark Wyse
*/
#include "gpu-compute/register_manager.hh"
#include "config/the_gpu_isa.hh"
#include "debug/GPURename.hh"
#include "gpu-compute/compute_unit.hh"
#include "gpu-compute/scalar_register_file.hh"
#include "gpu-compute/static_register_manager_policy.hh"
#include "gpu-compute/vector_register_file.hh"
#include "gpu-compute/wavefront.hh"
#include "params/RegisterManager.hh"
RegisterManager::RegisterManager(const RegisterManagerParams &p)
: SimObject(p), srfPoolMgrs(p.srf_pool_managers),
vrfPoolMgrs(p.vrf_pool_managers)
{
if (p.policy == "static") {
policy = new StaticRegisterManagerPolicy();
} else {
fatal("Unimplemented Register Manager Policy");
}
}
RegisterManager::~RegisterManager()
{
for (auto mgr : srfPoolMgrs) {
delete mgr;
}
for (auto mgr : vrfPoolMgrs) {
delete mgr;
}
}
void
RegisterManager::exec()
{
policy->exec();
}
void
RegisterManager::setParent(ComputeUnit *cu)
{
computeUnit = cu;
policy->setParent(computeUnit);
for (int i = 0; i < srfPoolMgrs.size(); i++) {
fatal_if(computeUnit->srf[i]->numRegs() %
srfPoolMgrs[i]->minAllocation(),
"Min SGPR allocation is not multiple of VRF size\n");
}
for (int i = 0; i < vrfPoolMgrs.size(); i++) {
fatal_if(computeUnit->vrf[i]->numRegs() %
vrfPoolMgrs[i]->minAllocation(),
"Min VGPG allocation is not multiple of VRF size\n");
}
}
// compute mapping for vector register
int
RegisterManager::mapVgpr(Wavefront* w, int vgprIndex)
{
return policy->mapVgpr(w, vgprIndex);
}
// compute mapping for scalar register
int
RegisterManager::mapSgpr(Wavefront* w, int sgprIndex)
{
return policy->mapSgpr(w, sgprIndex);
}
// check if we can allocate registers
bool
RegisterManager::canAllocateVgprs(int simdId, int nWfs, int demandPerWf)
{
return policy->canAllocateVgprs(simdId, nWfs, demandPerWf);
}
bool
RegisterManager::canAllocateSgprs(int simdId, int nWfs, int demandPerWf)
{
return policy->canAllocateSgprs(simdId, nWfs, demandPerWf);
}
// allocate registers
void
RegisterManager::allocateRegisters(Wavefront *w, int vectorDemand,
int scalarDemand)
{
policy->allocateRegisters(w, vectorDemand, scalarDemand);
}
void
RegisterManager::freeRegisters(Wavefront* w)
{
policy->freeRegisters(w);
}