IVGCVSW-1898 : Ref backend folder structure

* Reference backend is renamed to backends/reference as per
  https://confluence.arm.com/display/MLENG/Pluggable+backends

Change-Id: I27a13c274eb60995dfb459e3c49c0e2f60bcd32c

1 files changed, 138 insertions, 0 deletions

diff --git a/src/backends/reference/workloads/RefWorkloadUtils.hpp b/src/backends/reference/workloads/RefWorkloadUtils.hpp
new file mode 100644
index 0000000000..616a875028
--- /dev/null
+++ b/src/backends/reference/workloads/RefWorkloadUtils.hpp
@@ -0,0 +1,138 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include "backends/CpuTensorHandle.hpp"
+
+#include <armnn/Tensor.hpp>
+#include <armnn/Types.hpp>
+#include <Half.hpp>
+
+#include <boost/polymorphic_cast.hpp>
+
+namespace armnn
+{
+
+////////////////////////////////////////////
+/// float32 helpers
+////////////////////////////////////////////
+
+inline const TensorInfo& GetTensorInfo(const ITensorHandle* tensorHandle)
+{
+    // We know that reference workloads use CpuTensorHandles only, so this cast is legitimate.
+    const ConstCpuTensorHandle* cpuTensorHandle =
+        boost::polymorphic_downcast<const ConstCpuTensorHandle*>(tensorHandle);
+    return cpuTensorHandle->GetTensorInfo();
+}
+
+template <typename DataType>
+inline const DataType* GetConstCpuData(const ITensorHandle* tensorHandle)
+{
+    // We know that reference workloads use (Const)CpuTensorHandles only, so this cast is legitimate.
+    const ConstCpuTensorHandle* cpuTensorHandle =
+        boost::polymorphic_downcast<const ConstCpuTensorHandle*>(tensorHandle);
+    return cpuTensorHandle->GetConstTensor<DataType>();
+}
+
+template <typename DataType>
+inline DataType* GetCpuData(const ITensorHandle* tensorHandle)
+{
+    // We know that reference workloads use CpuTensorHandles only, so this cast is legitimate.
+    const CpuTensorHandle* cpuTensorHandle = boost::polymorphic_downcast<const CpuTensorHandle*>(tensorHandle);
+    return cpuTensorHandle->GetTensor<DataType>();
+};
+
+template <typename DataType, typename PayloadType>
+const DataType* GetInputTensorData(unsigned int idx, const PayloadType& data)
+{
+    const ITensorHandle* tensorHandle = data.m_Inputs[idx];
+    return GetConstCpuData<DataType>(tensorHandle);
+}
+
+template <typename DataType, typename PayloadType>
+DataType* GetOutputTensorData(unsigned int idx, const PayloadType& data)
+{
+    const ITensorHandle* tensorHandle = data.m_Outputs[idx];
+    return GetCpuData<DataType>(tensorHandle);
+}
+
+template <typename PayloadType>
+const float* GetInputTensorDataFloat(unsigned int idx, const PayloadType& data)
+{
+    return GetInputTensorData<float>(idx, data);
+}
+
+template <typename PayloadType>
+float* GetOutputTensorDataFloat(unsigned int idx, const PayloadType& data)
+{
+    return GetOutputTensorData<float>(idx, data);
+}
+
+template <typename PayloadType>
+const Half* GetInputTensorDataHalf(unsigned int idx, const PayloadType& data)
+{
+    return GetInputTensorData<Half>(idx, data);
+}
+
+template <typename PayloadType>
+Half* GetOutputTensorDataHalf(unsigned int idx, const PayloadType& data)
+{
+    return GetOutputTensorData<Half>(idx, data);
+}
+
+////////////////////////////////////////////
+/// u8 helpers
+////////////////////////////////////////////
+
+inline const uint8_t* GetConstCpuU8Data(const ITensorHandle* tensorHandle)
+{
+    // We know that reference workloads use (Const)CpuTensorHandles only, so this cast is legitimate.
+    const ConstCpuTensorHandle* cpuTensorHandle =
+        boost::polymorphic_downcast<const ConstCpuTensorHandle*>(tensorHandle);
+    return cpuTensorHandle->GetConstTensor<uint8_t>();
+};
+
+inline uint8_t* GetCpuU8Data(const ITensorHandle* tensorHandle)
+{
+    // We know that reference workloads use CpuTensorHandles only, so this cast is legitimate.
+    const CpuTensorHandle* cpuTensorHandle = boost::polymorphic_downcast<const CpuTensorHandle*>(tensorHandle);
+    return cpuTensorHandle->GetTensor<uint8_t>();
+};
+
+template <typename PayloadType>
+const uint8_t* GetInputTensorDataU8(unsigned int idx, const PayloadType& data)
+{
+    const ITensorHandle* tensorHandle = data.m_Inputs[idx];
+    return GetConstCpuU8Data(tensorHandle);
+}
+
+template <typename PayloadType>
+uint8_t* GetOutputTensorDataU8(unsigned int idx, const PayloadType& data)
+{
+    const ITensorHandle* tensorHandle = data.m_Outputs[idx];
+    return GetCpuU8Data(tensorHandle);
+}
+
+template<typename T>
+std::vector<float> Dequantize(const T* quant, const TensorInfo& info)
+{
+    std::vector<float> ret(info.GetNumElements());
+    for (size_t i = 0; i < info.GetNumElements(); i++)
+    {
+        ret[i] = armnn::Dequantize(quant[i], info.GetQuantizationScale(), info.GetQuantizationOffset());
+    }
+    return ret;
+}
+
+inline void Quantize(uint8_t* quant, const float* dequant, const TensorInfo& info)
+{
+    for (size_t i = 0; i < info.GetNumElements(); i++)
+    {
+        quant[i] = armnn::Quantize<uint8_t>(dequant[i], info.GetQuantizationScale(), info.GetQuantizationOffset());
+    }
+}
+
+} //namespace armnn