IVGCVSW-4375 Add support for Transpose

 * Added TransposeLayer
 * Added CL, Neon and Ref Workloads
 * Added Transpose utilities
 * Added Serializer and Deserializer support
 * Added Quantizer support

Signed-off-by: Mike Kelly <mike.kelly@arm.com>
Change-Id: I04c755ba7cb5b1edf72b3c9f3c0314878032e3c7

4 files changed, 72 insertions, 2 deletions

diff --git a/src/armnnSerializer/ArmnnSchema.fbs b/src/armnnSerializer/ArmnnSchema.fbs
index 0697517a0f..d175d41f3f 100644
--- a/src/armnnSerializer/ArmnnSchema.fbs
+++ b/src/armnnSerializer/ArmnnSchema.fbs
@@ -149,7 +149,8 @@ enum LayerType : uint {
     LogSoftmax = 51,
     Comparison = 52,
     StandIn = 53,
-    ElementwiseUnary = 54
+    ElementwiseUnary = 54,
+    Transpose = 55
 }
 
 // Base layer table to be used as part of other layers
@@ -732,6 +733,15 @@ table TransposeConvolution2dDescriptor {
     dataLayout:DataLayout = NCHW;
 }
 
+table TransposeLayer {
+    base:LayerBase;
+    descriptor:TransposeDescriptor;
+}
+
+table TransposeDescriptor {
+    dimMappings:[uint];
+}
+
 table ResizeLayer {
     base:LayerBase;
     descriptor:ResizeDescriptor;
@@ -820,7 +830,8 @@ union Layer {
     LogSoftmaxLayer,
     ComparisonLayer,
     StandInLayer,
-    ElementwiseUnaryLayer
+    ElementwiseUnaryLayer,
+    TransposeLayer
 }
 
 table AnyLayer {
diff --git a/src/armnnSerializer/Serializer.cpp b/src/armnnSerializer/Serializer.cpp
index 3c01842c95..a3fdcf8123 100644
--- a/src/armnnSerializer/Serializer.cpp
+++ b/src/armnnSerializer/Serializer.cpp
@@ -1301,6 +1301,33 @@ void SerializerVisitor::VisitTransposeConvolution2dLayer(
     CreateAnyLayer(fbLayer.o, serializer::Layer::Layer_TransposeConvolution2dLayer);
 }
 
+void SerializerVisitor::VisitTransposeLayer(const armnn::IConnectableLayer* layer,
+                                            const armnn::TransposeDescriptor& descriptor,
+                                            const char* name)
+{
+    boost::ignore_unused(name);
+
+    // Create FlatBuffer BaseLayer
+    auto flatBufferBaseLayer = CreateLayerBase(layer, serializer::LayerType::LayerType_Transpose);
+
+    std::vector<unsigned int> dimMappings;
+    for (unsigned int i=0; i<descriptor.m_DimMappings.GetSize(); ++i)
+    {
+        dimMappings.push_back(descriptor.m_DimMappings[i]);
+    }
+
+    auto flatBufferDesc = serializer::CreateTransposeDescriptor(m_flatBufferBuilder,
+                                                                m_flatBufferBuilder.CreateVector(dimMappings));
+
+    // Create the FlatBuffer TransposeLayer
+    auto flatBufferLayer = serializer::CreateTransposeLayer(m_flatBufferBuilder,
+                                                            flatBufferBaseLayer,
+                                                            flatBufferDesc);
+
+    // Add the AnyLayer to the FlatBufferLayers
+    CreateAnyLayer(flatBufferLayer.o, serializer::Layer::Layer_TransposeLayer);
+}
+
 void SerializerVisitor::VisitQuantizedLstmLayer(const armnn::IConnectableLayer* layer,
                                                 const armnn::QuantizedLstmInputParams& params,
                                                 const char* name)
diff --git a/src/armnnSerializer/Serializer.hpp b/src/armnnSerializer/Serializer.hpp
index 14d2776147..737cf3bb76 100644
--- a/src/armnnSerializer/Serializer.hpp
+++ b/src/armnnSerializer/Serializer.hpp
@@ -270,6 +270,10 @@ public:
                                           const armnn::Optional<armnn::ConstTensor>& biases,
                                           const char* = nullptr) override;
 
+    void VisitTransposeLayer(const armnn::IConnectableLayer* layer,
+                             const armnn::TransposeDescriptor& descriptor,
+                             const char* name = nullptr) override;
+
 private:
 
     /// Creates the Input Slots and Output Slots and LayerBase for the layer.
diff --git a/src/armnnSerializer/test/SerializerTests.cpp b/src/armnnSerializer/test/SerializerTests.cpp
index 47804fe328..8c9c92b634 100644
--- a/src/armnnSerializer/test/SerializerTests.cpp
+++ b/src/armnnSerializer/test/SerializerTests.cpp
@@ -2501,6 +2501,34 @@ BOOST_AUTO_TEST_CASE(SerializeSwitch)
     deserializedNetwork->Accept(verifier);
 }
 
+BOOST_AUTO_TEST_CASE(SerializeTranspose)
+{
+    DECLARE_LAYER_VERIFIER_CLASS_WITH_DESCRIPTOR(Transpose)
+
+    const std::string layerName("transpose");
+    const armnn::TensorInfo inputTensorInfo({4, 3, 2, 1}, armnn::DataType::Float32);
+    const armnn::TensorInfo outputTensorInfo({1, 2, 3, 4}, armnn::DataType::Float32);
+
+    armnn::TransposeDescriptor descriptor(armnn::PermutationVector({3, 2, 1, 0}));
+
+    armnn::INetworkPtr network = armnn::INetwork::Create();
+    armnn::IConnectableLayer* const inputLayer = network->AddInputLayer(0);
+    armnn::IConnectableLayer* const transposeLayer = network->AddTransposeLayer(descriptor, layerName.c_str());
+    armnn::IConnectableLayer* const outputLayer = network->AddOutputLayer(0);
+
+    inputLayer->GetOutputSlot(0).Connect(transposeLayer->GetInputSlot(0));
+    transposeLayer->GetOutputSlot(0).Connect(outputLayer->GetInputSlot(0));
+
+    inputLayer->GetOutputSlot(0).SetTensorInfo(inputTensorInfo);
+    transposeLayer->GetOutputSlot(0).SetTensorInfo(outputTensorInfo);
+
+    armnn::INetworkPtr deserializedNetwork = DeserializeNetwork(SerializeNetwork(*network));
+    BOOST_CHECK(deserializedNetwork);
+
+    TransposeLayerVerifier verifier(layerName, {inputTensorInfo}, {outputTensorInfo}, descriptor);
+    deserializedNetwork->Accept(verifier);
+}
+
 BOOST_AUTO_TEST_CASE(SerializeTransposeConvolution2d)
 {
     using Descriptor = armnn::TransposeConvolution2dDescriptor;