IVGCVSW-4515 Add ConvertBf16ToFp32Layer and Ref workload support

Signed-off-by: Narumol Prangnawarat <narumol.prangnawarat@arm.com>
Change-Id: Ida6d7e1d2c9abe0618f8b711bab9d62c011090d6

1 files changed, 55 insertions, 0 deletions

diff --git a/src/armnn/layers/ConvertBf16ToFp32Layer.cpp b/src/armnn/layers/ConvertBf16ToFp32Layer.cpp
new file mode 100644
index 0000000000..147aa8f46a
--- /dev/null
+++ b/src/armnn/layers/ConvertBf16ToFp32Layer.cpp
@@ -0,0 +1,55 @@
+//
+// Copyright © 2020 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#include "ConvertBf16ToFp32Layer.hpp"
+#include "LayerCloneBase.hpp"
+
+#include <armnn/TypesUtils.hpp>
+
+#include <backendsCommon/WorkloadData.hpp>
+#include <backendsCommon/WorkloadFactory.hpp>
+
+namespace armnn
+{
+
+ConvertBf16ToFp32Layer::ConvertBf16ToFp32Layer(const char* name)
+    : Layer(1, 1, LayerType::ConvertBf16ToFp32, name)
+{
+}
+
+std::unique_ptr<IWorkload> ConvertBf16ToFp32Layer::CreateWorkload(const IWorkloadFactory& factory) const
+{
+    ConvertBf16ToFp32QueueDescriptor descriptor;
+    return factory.CreateConvertBf16ToFp32(descriptor, PrepInfoAndDesc(descriptor));
+}
+
+ConvertBf16ToFp32Layer* ConvertBf16ToFp32Layer::Clone(Graph& graph) const
+{
+    return CloneBase<ConvertBf16ToFp32Layer>(graph, GetName());
+}
+
+void ConvertBf16ToFp32Layer::ValidateTensorShapesFromInputs()
+{
+    VerifyLayerConnections(1, CHECK_LOCATION());
+
+    auto inferredShapes = InferOutputShapes({ GetInputSlot(0).GetConnection()->GetTensorInfo().GetShape() });
+
+    BOOST_ASSERT(inferredShapes.size() == 1);
+
+    ConditionalThrowIfNotEqual<LayerValidationException>(
+        "ConvertBf16ToFp32Layer: TensorShape set on OutputSlot[0] does not match the inferred shape.",
+        GetOutputSlot(0).GetTensorInfo().GetShape(),
+        inferredShapes[0]);
+}
+
+void ConvertBf16ToFp32Layer::Accept(ILayerVisitor& visitor) const
+{
+    // these conversion layers are only inserted by the
+    // optimizer and so will never be in an input graph.
+    IgnoreUnused(visitor);
+    throw armnn::Exception("ConvertBf16ToFp32Layer should never appear in an input graph");
+}
+
+} // namespace armnn