1 files changed, 94 insertions, 0 deletions
diff --git a/src/backends/reference/workloads/Splitter.cpp b/src/backends/reference/workloads/Splitter.cpp
new file mode 100644
index 0000000000..3bddfb0cab
--- /dev/null
+++ b/src/backends/reference/workloads/Splitter.cpp
@@ -0,0 +1,94 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#include "RefWorkloadUtils.hpp"
+#include <backendsCommon/WorkloadData.hpp>
+#include <armnn/Tensor.hpp>
+
+#include <boost/assert.hpp>
+#include "Splitter.hpp"
+
+#include <cmath>
+#include <limits>
+
+#include "Decoders.hpp"
+#include "Encoders.hpp"
+
+namespace armnn
+{
+
+void Split(const SplitterQueueDescriptor& data)
+{
+    const TensorInfo& inputInfo = GetTensorInfo(data.m_Inputs[0]);
+
+    std::unique_ptr<Decoder<float>> decoderPtr =
+        MakeDecoder<float>(inputInfo, data.m_Inputs[0]->Map());
+    Decoder<float>& decoder = *decoderPtr;
+
+    for (unsigned int index = 0; index < inputInfo.GetNumElements(); ++index)
+    {
+        unsigned int indices[MaxNumOfTensorDimensions] = { 0 };
+
+        unsigned int indexRemainder = index;
+        unsigned int dimensionStride = inputInfo.GetNumElements();
+
+        for (unsigned int i = 0; i<inputInfo.GetNumDimensions(); i++)
+        {
+            dimensionStride /= inputInfo.GetShape()[i];
+            indices[i] = indexRemainder / dimensionStride; // Use integer division to round down.
+            indexRemainder -= indices[i] * dimensionStride;
+        }
+
+        for (unsigned int viewIdx = 0; viewIdx < data.m_ViewOrigins.size(); ++viewIdx)
+        {
+            SplitterQueueDescriptor::ViewOrigin const& view = data.m_ViewOrigins[viewIdx];
+
+            //Split view extents are defined by the size of (the corresponding) input tensor.
+            const TensorInfo& outputInfo = GetTensorInfo(data.m_Outputs[viewIdx]);
+            BOOST_ASSERT(outputInfo.GetNumDimensions() == inputInfo.GetNumDimensions());
+
+            // Check all dimensions to see if this element is inside the given input view.
+            bool insideView = true;
+            for (unsigned int i = 0; i<outputInfo.GetNumDimensions(); i++)
+            {
+                if (indices[i] < view.m_Origin[i])
+                {
+                    insideView = false;
+                }
+                if (indices[i] >= view.m_Origin[i] + outputInfo.GetShape()[i])
+                {
+                    insideView = false;
+                }
+            }
+
+            if (insideView)
+            {
+                std::unique_ptr<Encoder<float>> encoderPtr =
+                    MakeEncoder<float>(outputInfo, data.m_Outputs[viewIdx]->Map());
+                Encoder<float>& encoder = *encoderPtr;
+
+                unsigned int outIndex = 0;
+                unsigned int dimensionStride = 1;
+                float inputValue = 0.f;
+
+                for (unsigned int i = outputInfo.GetNumDimensions(); i-- > 0;)
+                {
+                    outIndex += dimensionStride * (indices[i] - view.m_Origin[i]);
+                    dimensionStride *= outputInfo.GetShape()[i];
+                }
+
+                decoder += index;
+                inputValue = decoder.Get();
+                decoder -= index;
+
+                encoder += outIndex;
+                encoder.Set(inputValue);
+                break;
+            }
+        }
+    }
+}
+
+}
+\ No newline at end of file