IVGCVSW-3294 Add Neon backend support for PReLU

Change-Id: I2f92f7336d3b4188962a9d08b0e7c6372b1c648f
Signed-off-by: Nikhil Raj <nikhil.raj@arm.com>

4 files changed, 82 insertions, 0 deletions

diff --git a/src/backends/neon/workloads/CMakeLists.txt b/src/backends/neon/workloads/CMakeLists.txt
index f6568e1f7e..8f9b7d5d09 100644
--- a/src/backends/neon/workloads/CMakeLists.txt
+++ b/src/backends/neon/workloads/CMakeLists.txt
@@ -50,6 +50,8 @@ list(APPEND armnnNeonBackendWorkloads_sources
     NeonPermuteWorkload.hpp
     NeonPooling2dWorkload.cpp
     NeonPooling2dWorkload.hpp
+    NeonPreluWorkload.cpp
+    NeonPreluWorkload.hpp
     NeonQuantizeWorkload.cpp
     NeonQuantizeWorkload.hpp
     NeonReshapeWorkload.cpp
diff --git a/src/backends/neon/workloads/NeonPreluWorkload.cpp b/src/backends/neon/workloads/NeonPreluWorkload.cpp
new file mode 100644
index 0000000000..107090e704
--- /dev/null
+++ b/src/backends/neon/workloads/NeonPreluWorkload.cpp
@@ -0,0 +1,50 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#include "NeonPreluWorkload.hpp"
+#include "NeonWorkloadUtils.hpp"
+#include <aclCommon/ArmComputeUtils.hpp>
+
+#include <arm_compute/runtime/NEON/functions/NEPReluLayer.h>
+
+namespace armnn
+{
+
+arm_compute::Status NeonPreluWorkloadValidate(const TensorInfo& input,
+                                              const TensorInfo& alpha,
+                                              const TensorInfo& output)
+{
+    const arm_compute::TensorInfo aclInput = armcomputetensorutils::BuildArmComputeTensorInfo(input);
+    const arm_compute::TensorInfo aclAlpha = armcomputetensorutils::BuildArmComputeTensorInfo(alpha);
+    const arm_compute::TensorInfo aclOutput = armcomputetensorutils::BuildArmComputeTensorInfo(output);
+
+    return arm_compute::NEPReluLayer::validate(&aclInput,
+                                               &aclAlpha,
+                                               &aclOutput);
+}
+
+NeonPreluWorkload::NeonPreluWorkload(const PreluQueueDescriptor& descriptor,
+                                     const WorkloadInfo& info)
+        : BaseWorkload<PreluQueueDescriptor>(descriptor, info)
+{
+    m_Data.ValidateInputsOutputs("NeonPreluWorkload", 1, 1);
+
+    arm_compute::ITensor& input = boost::polymorphic_downcast<IAclTensorHandle*>(m_Data.m_Inputs[0])->GetTensor();
+    arm_compute::ITensor& alpha = boost::polymorphic_downcast<IAclTensorHandle*>(m_Data.m_Inputs[1])->GetTensor();
+    arm_compute::ITensor& output = boost::polymorphic_downcast<IAclTensorHandle*>(m_Data.m_Outputs[0])->GetTensor();
+
+    auto layer = std::make_unique<arm_compute::NEPReluLayer>();
+    layer->configure(&input, &alpha, &output);
+
+    m_PreluLayer.reset(layer.release());
+}
+
+void NeonPreluWorkload::Execute() const
+{
+    ARMNN_SCOPED_PROFILING_EVENT_NEON("NeonPreluWorkload_Execute");
+    m_PreluLayer->run();
+}
+
+} //namespace armnn
\ No newline at end of file
diff --git a/src/backends/neon/workloads/NeonPreluWorkload.hpp b/src/backends/neon/workloads/NeonPreluWorkload.hpp
new file mode 100644
index 0000000000..a0d46c2e94
--- /dev/null
+++ b/src/backends/neon/workloads/NeonPreluWorkload.hpp
@@ -0,0 +1,29 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include <backendsCommon/Workload.hpp>
+#include <arm_compute/core/Error.h>
+#include <arm_compute/runtime/IFunction.h>
+
+namespace armnn
+{
+
+arm_compute::Status NeonPreluWorkloadValidate(const TensorInfo& input,
+                                              const TensorInfo& alpha,
+                                              const TensorInfo& output);
+
+class NeonPreluWorkload : public BaseWorkload<PreluQueueDescriptor>
+{
+public:
+    NeonPreluWorkload(const PreluQueueDescriptor& descriptor, const WorkloadInfo& info);
+    void Execute() const override;
+
+private:
+    std::unique_ptr<arm_compute::IFunction> m_PreluLayer;
+};
+
+} //namespace armnn
diff --git a/src/backends/neon/workloads/NeonWorkloads.hpp b/src/backends/neon/workloads/NeonWorkloads.hpp
index ecd50c9d02..ebea879bad 100644
--- a/src/backends/neon/workloads/NeonWorkloads.hpp
+++ b/src/backends/neon/workloads/NeonWorkloads.hpp
@@ -27,6 +27,7 @@
 #include "NeonPadWorkload.hpp"
 #include "NeonPermuteWorkload.hpp"
 #include "NeonPooling2dWorkload.hpp"
+#include "NeonPreluWorkload.hpp"
 #include "NeonQuantizeWorkload.hpp"
 #include "NeonReshapeWorkload.hpp"
 #include "NeonResizeBilinearWorkload.hpp"