IVGCVSW-3973 Add frontend for LOG_SOFTMAX

Signed-off-by: Aron Virginas-Tar <Aron.Virginas-Tar@arm.com>
Change-Id: Ic6acc7176deea3753b32ce6340f642d19dce0e9f

7 files changed, 63 insertions, 3 deletions

diff --git a/src/backends/backendsCommon/LayerSupportBase.cpp b/src/backends/backendsCommon/LayerSupportBase.cpp
index c41f0b11ea..7d5555ce68 100644
--- a/src/backends/backendsCommon/LayerSupportBase.cpp
+++ b/src/backends/backendsCommon/LayerSupportBase.cpp
@@ -250,6 +250,14 @@ bool LayerSupportBase::IsL2NormalizationSupported(const TensorInfo& input,
     return DefaultLayerSupport(__func__, __FILE__, __LINE__, reasonIfUnsupported);
 }
 
+bool LayerSupportBase::IsLogSoftmaxSupported(const TensorInfo& input,
+                                             const TensorInfo& output,
+                                             const LogSoftmaxDescriptor& descriptor,
+                                             Optional<std::string&> reasonIfUnsupported) const
+{
+    return DefaultLayerSupport(__func__, __FILE__, __LINE__, reasonIfUnsupported);
+}
+
 bool LayerSupportBase::IsLstmSupported(const TensorInfo& input,
                                        const TensorInfo& outputStateIn,
                                        const TensorInfo& cellStateIn,
diff --git a/src/backends/backendsCommon/LayerSupportBase.hpp b/src/backends/backendsCommon/LayerSupportBase.hpp
index 495870e645..cb660f5c2b 100644
--- a/src/backends/backendsCommon/LayerSupportBase.hpp
+++ b/src/backends/backendsCommon/LayerSupportBase.hpp
@@ -152,6 +152,11 @@ public:
                                     const L2NormalizationDescriptor& descriptor,
                                     Optional<std::string&> reasonIfUnsupported = EmptyOptional()) const override;
 
+    bool IsLogSoftmaxSupported(const TensorInfo& input,
+                               const TensorInfo& output,
+                               const LogSoftmaxDescriptor& descriptor,
+                               Optional<std::string&> reasonIfUnsupported = EmptyOptional()) const override;
+
     bool IsLstmSupported(const TensorInfo& input,
                          const TensorInfo& outputStateIn,
                          const TensorInfo& cellStateIn,
diff --git a/src/backends/backendsCommon/WorkloadData.cpp b/src/backends/backendsCommon/WorkloadData.cpp
index ea0e5c82b8..b8d4f0dfff 100644
--- a/src/backends/backendsCommon/WorkloadData.cpp
+++ b/src/backends/backendsCommon/WorkloadData.cpp
@@ -1294,8 +1294,6 @@ void InstanceNormalizationQueueDescriptor::Validate(const WorkloadInfo& workload
         };
 
     ValidateDataTypes(inputTensorInfo,  supportedTypes, descriptorName);
-    ValidateDataTypes(outputTensorInfo, supportedTypes, descriptorName);
-
     ValidateTensorDataTypesMatch(inputTensorInfo, outputTensorInfo, descriptorName, "input", "output");
 }
 
@@ -1326,8 +1324,28 @@ void L2NormalizationQueueDescriptor::Validate(const WorkloadInfo& workloadInfo)
     };
 
     ValidateDataTypes(inputTensorInfo,  supportedTypes, descriptorName);
-    ValidateDataTypes(outputTensorInfo, supportedTypes, descriptorName);
+    ValidateTensorDataTypesMatch(inputTensorInfo, outputTensorInfo, descriptorName, "input", "output");
+}
+
+void LogSoftmaxQueueDescriptor::Validate(const WorkloadInfo& workloadInfo) const
+{
+    const std::string descriptorName{"LogSoftmaxQueueDescriptor"};
+
+    ValidateNumInputs(workloadInfo,  descriptorName, 1);
+    ValidateNumOutputs(workloadInfo, descriptorName, 1);
+
+    const TensorInfo& inputTensorInfo  = workloadInfo.m_InputTensorInfos[0];
+    const TensorInfo& outputTensorInfo = workloadInfo.m_OutputTensorInfos[0];
+
+    ValidateTensorShapesMatch(inputTensorInfo, outputTensorInfo, descriptorName, "input", "output");
 
+    std::vector<DataType> supportedTypes =
+    {
+        DataType::Float32,
+        DataType::Float16,
+    };
+
+    ValidateDataTypes(inputTensorInfo,  supportedTypes, descriptorName);
     ValidateTensorDataTypesMatch(inputTensorInfo, outputTensorInfo, descriptorName, "input", "output");
 }
 
diff --git a/src/backends/backendsCommon/WorkloadData.hpp b/src/backends/backendsCommon/WorkloadData.hpp
index 1bf3aa7509..5a3600fc71 100644
--- a/src/backends/backendsCommon/WorkloadData.hpp
+++ b/src/backends/backendsCommon/WorkloadData.hpp
@@ -317,6 +317,11 @@ struct L2NormalizationQueueDescriptor : QueueDescriptorWithParameters<L2Normaliz
     void Validate(const WorkloadInfo& workloadInfo) const;
 };
 
+struct LogSoftmaxQueueDescriptor : QueueDescriptorWithParameters<LogSoftmaxDescriptor>
+{
+    void Validate(const WorkloadInfo& workloadInfo) const;
+};
+
 struct ConstantQueueDescriptor : QueueDescriptor
 {
     ConstantQueueDescriptor()
diff --git a/src/backends/backendsCommon/WorkloadFactory.cpp b/src/backends/backendsCommon/WorkloadFactory.cpp
index 98fe158fc5..f19b48491a 100644
--- a/src/backends/backendsCommon/WorkloadFactory.cpp
+++ b/src/backends/backendsCommon/WorkloadFactory.cpp
@@ -401,6 +401,19 @@ bool IWorkloadFactory::IsLayerSupported(const BackendId& backendId,
                                                 reason);
             break;
         }
+        case LayerType::LogSoftmax:
+        {
+            auto cLayer = boost::polymorphic_downcast<const LogSoftmaxLayer*>(&layer);
+
+            const TensorInfo& input  = layer.GetInputSlot(0).GetConnection()->GetTensorInfo();
+            const TensorInfo& output = layer.GetOutputSlot(0).GetTensorInfo();
+
+            result = layerSupportObject->IsLogSoftmaxSupported(OverrideDataType(input, dataType),
+                                                               OverrideDataType(output, dataType),
+                                                               cLayer->GetParameters(),
+                                                               reason);
+            break;
+        }
         case LayerType::Lstm:
         {
             auto cLayer = boost::polymorphic_downcast<const LstmLayer*>(&layer);
@@ -1167,6 +1180,12 @@ std::unique_ptr<IWorkload> IWorkloadFactory::CreateL2Normalization(const L2Norma
     return std::unique_ptr<IWorkload>();
 }
 
+std::unique_ptr<IWorkload> IWorkloadFactory::CreateLogSoftmax(const LogSoftmaxQueueDescriptor& descriptor,
+                                                              const WorkloadInfo& info) const
+{
+    return std::unique_ptr<IWorkload>();
+}
+
 std::unique_ptr<IWorkload> IWorkloadFactory::CreateLstm(const LstmQueueDescriptor& descriptor,
                                                         const WorkloadInfo& info) const
 {
diff --git a/src/backends/backendsCommon/WorkloadFactory.hpp b/src/backends/backendsCommon/WorkloadFactory.hpp
index 9fa0221f31..fa7a9d46a8 100644
--- a/src/backends/backendsCommon/WorkloadFactory.hpp
+++ b/src/backends/backendsCommon/WorkloadFactory.hpp
@@ -127,6 +127,9 @@ public:
     virtual std::unique_ptr<IWorkload> CreateL2Normalization(const L2NormalizationQueueDescriptor& descriptor,
                                                              const WorkloadInfo& info) const;
 
+    virtual std::unique_ptr<IWorkload> CreateLogSoftmax(const LogSoftmaxQueueDescriptor& descriptor,
+                                                        const WorkloadInfo& info) const;
+
     virtual std::unique_ptr<IWorkload> CreateLstm(const LstmQueueDescriptor& descriptor,
                                                   const WorkloadInfo& info) const;
 
diff --git a/src/backends/backendsCommon/test/IsLayerSupportedTestImpl.hpp b/src/backends/backendsCommon/test/IsLayerSupportedTestImpl.hpp
index c8604140ec..907285c5cf 100644
--- a/src/backends/backendsCommon/test/IsLayerSupportedTestImpl.hpp
+++ b/src/backends/backendsCommon/test/IsLayerSupportedTestImpl.hpp
@@ -439,6 +439,8 @@ DECLARE_LAYER_POLICY_2_PARAM(InstanceNormalization)
 
 DECLARE_LAYER_POLICY_2_PARAM(L2Normalization)
 
+DECLARE_LAYER_POLICY_2_PARAM(LogSoftmax)
+
 DECLARE_LAYER_POLICY_2_PARAM(Lstm)
 
 DECLARE_LAYER_POLICY_1_PARAM(Maximum)