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//
// Copyright © 2022-2024 Arm Ltd and Contributors. All rights reserved.
// SPDX-License-Identifier: MIT
//
#include "TosaRefBackend.hpp"
#include "TosaRefBackendId.hpp"
#include "TosaRefWorkloadFactory.hpp"
#include "TosaRefLayerSupport.hpp"
#include "TosaRefTensorHandleFactory.hpp"
#include <tosaCommon/TosaMappings.hpp>
#include <armnn/BackendRegistry.hpp>
#include <armnn/backends/IBackendContext.hpp>
#include <armnn/backends/IMemoryManager.hpp>
#include <armnn/utility/PolymorphicDowncast.hpp>
#include <backendsCommon/DefaultAllocator.hpp>
#include <backendsCommon/SubgraphUtils.hpp>
#include <Optimizer.hpp>
namespace armnn
{
// Utility function to construct a valid Deleter for TosaSerializationHandler ptrs passed back to ArmNN
template <typename T>
void DeleteAsType(const void* const blob)
{
delete static_cast<const T*>(blob);
}
const BackendId& TosaRefBackend::GetIdStatic()
{
static const BackendId s_Id{TosaRefBackendId()};
return s_Id;
}
IBackendInternal::IWorkloadFactoryPtr TosaRefBackend::CreateWorkloadFactory(
const IBackendInternal::IMemoryManagerSharedPtr& memoryManager) const
{
return std::make_unique<TosaRefWorkloadFactory>(PolymorphicPointerDowncast<TosaRefMemoryManager>(memoryManager));
}
IBackendInternal::IWorkloadFactoryPtr TosaRefBackend::CreateWorkloadFactory(
class TensorHandleFactoryRegistry& tensorHandleFactoryRegistry) const
{
auto memoryManager = std::make_shared<TosaRefMemoryManager>();
tensorHandleFactoryRegistry.RegisterMemoryManager(memoryManager);
auto factory = std::make_unique<TosaRefTensorHandleFactory>(memoryManager);
// Register copy and import factory pair
tensorHandleFactoryRegistry.RegisterCopyAndImportFactoryPair(factory->GetId(), factory->GetId());
// Register the factory
tensorHandleFactoryRegistry.RegisterFactory(std::move(factory));
return std::make_unique<TosaRefWorkloadFactory>(PolymorphicPointerDowncast<TosaRefMemoryManager>(memoryManager));
}
IBackendInternal::IBackendContextPtr TosaRefBackend::CreateBackendContext(const IRuntime::CreationOptions&) const
{
return IBackendContextPtr{};
}
IBackendInternal::IBackendProfilingContextPtr TosaRefBackend::CreateBackendProfilingContext(
const IRuntime::CreationOptions&, IBackendProfilingPtr&)
{
return IBackendProfilingContextPtr{};
}
IBackendInternal::IMemoryManagerUniquePtr TosaRefBackend::CreateMemoryManager() const
{
return std::make_unique<TosaRefMemoryManager>();
}
IBackendInternal::ILayerSupportSharedPtr TosaRefBackend::GetLayerSupport() const
{
static ILayerSupportSharedPtr layerSupport{new TosaRefLayerSupport};
return layerSupport;
}
OptimizationViews TosaRefBackend::OptimizeSubgraphView(const SubgraphView& subgraph,
const ModelOptions& modelOptions) const
{
OptimizationViews optimizationViews(modelOptions);
auto handler = std::make_unique<TosaSerializationHandler>();
std::vector<std::string> graphInputs;
std::vector<std::string> graphOutputs;
std::vector<TosaSerializationOperator*> operators;
std::vector<TosaSerializationTensor*> tensors;
auto it = subgraph.begin();
while (it != subgraph.end())
{
Layer& base = *(PolymorphicDowncast<Layer*>(*it));
if(base.GetType() == armnn::LayerType::Input ||
base.GetType() == armnn::LayerType::Output)
{
++it;
continue;
}
tosa::TosaSerializationBasicBlock* mappings = GetTosaMappingFromLayer(&base);
// Loop through inputs to see if there are any graph inputs, if so save them.
// If it's an input to the graph "input" can be found in the string.
for (const std::string& blockInputName : mappings->GetInputs())
{
if (blockInputName.find("input") != std::string::npos)
{
graphInputs.push_back(blockInputName);
}
}
// Loop through outputs to see if there are any graph outputs, if so save them.
// If it's an output to the graph "output" can be found in the string.
for (const std::string& blockOutputName : mappings->GetOutputs())
{
if (blockOutputName.find("output") != std::string::npos)
{
graphOutputs.push_back(blockOutputName);
}
}
auto blockOperators = mappings->GetOperators();
operators.insert(operators.end(), blockOperators.begin(), blockOperators.end());
auto blockTensors = mappings->GetTensors();
tensors.insert(tensors.end(), blockTensors.begin(), blockTensors.end());
++it;
}
// Add all mappings to main block.
auto* block = new TosaSerializationBasicBlock("main", "main", operators, tensors, graphInputs, graphOutputs);
std::vector<TosaSerializationBasicBlock*> blocks;
blocks.emplace_back(block);
// Add blocks to the main region.
auto* region = new TosaSerializationRegion("main", blocks);
handler->GetRegions().emplace_back(region);
auto compiledBlob =
std::make_unique<PreCompiledObjectPtr>(handler.release(), DeleteAsType<TosaSerializationHandler>);
IConnectableLayer* preCompiledLayer = optimizationViews.GetINetwork()->AddPrecompiledLayer(
PreCompiledDescriptor(subgraph.GetNumInputSlots(), subgraph.GetNumOutputSlots()),
std::move(*compiledBlob),
armnn::Optional<BackendId>(GetId()),
"TOSA_Pre_Compiled_Layer");
// Copy the output tensor infos from sub-graph
for (unsigned int i = 0; i < subgraph.GetNumOutputSlots(); i++)
{
preCompiledLayer->GetOutputSlot(i).SetTensorInfo(subgraph.GetIOutputSlot(i)->GetTensorInfo());
}
optimizationViews.AddSubstitution({ std::move(subgraph), SubgraphView(preCompiledLayer) });
return optimizationViews;
}
std::vector<ITensorHandleFactory::FactoryId> TosaRefBackend::GetHandleFactoryPreferences() const
{
return std::vector<ITensorHandleFactory::FactoryId> { TosaRefTensorHandleFactory::GetIdStatic() };
}
void TosaRefBackend::RegisterTensorHandleFactories(class TensorHandleFactoryRegistry& registry)
{
auto memoryManager = std::make_shared<TosaRefMemoryManager>();
registry.RegisterMemoryManager(memoryManager);
auto factory = std::make_unique<TosaRefTensorHandleFactory>(memoryManager);
// Register copy and import factory pair
registry.RegisterCopyAndImportFactoryPair(factory->GetId(), factory->GetId());
// Register the factory
registry.RegisterFactory(std::move(factory));
}
std::unique_ptr<ICustomAllocator> TosaRefBackend::GetDefaultAllocator() const
{
return std::make_unique<DefaultAllocator>();
}
} // namespace armnn
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