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, 42 insertions, 0 deletions

diff --git a/src/backends/reference/workloads/TensorBufferArrayView.hpp b/src/backends/reference/workloads/TensorBufferArrayView.hpp
new file mode 100644
index 0000000000..e19810ca87
--- /dev/null
+++ b/src/backends/reference/workloads/TensorBufferArrayView.hpp
@@ -0,0 +1,42 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#include <armnn/Tensor.hpp>
+
+#include <boost/assert.hpp>
+
+namespace armnn
+{
+
+// Utility class providing access to raw tensor memory based on indices along each dimension.
+template <typename DataType>
+class TensorBufferArrayView
+{
+public:
+    TensorBufferArrayView(const TensorShape& shape, DataType* data)
+        : m_Shape(shape)
+        , m_Data(data)
+    {
+    }
+
+    DataType& Get(unsigned int b, unsigned int c, unsigned int h, unsigned int w) const
+    {
+        BOOST_ASSERT( b < m_Shape[0] || (m_Shape[0] == 0 && b == 0) );
+        BOOST_ASSERT( c < m_Shape[1] || (m_Shape[1] == 0 && c == 0) );
+        BOOST_ASSERT( h < m_Shape[2] || (m_Shape[2] == 0 && h == 0) );
+        BOOST_ASSERT( w < m_Shape[3] || (m_Shape[3] == 0 && w == 0) );
+
+        return m_Data[b * m_Shape[1] * m_Shape[2] * m_Shape[3]
+                    + c * m_Shape[2] * m_Shape[3]
+                    + h * m_Shape[3]
+                    + w];
+    }
+
+private:
+    const TensorShape m_Shape;
+    DataType* m_Data;
+};
+
+} //namespace armnn