COMPMID-3083: Add graph support for PRelu

Change-Id: I48492f8c48b818b563bba1e0b48831ac5cdf1420
Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/2685
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>

6 files changed, 94 insertions, 1 deletions

diff --git a/src/graph/GraphBuilder.cpp b/src/graph/GraphBuilder.cpp
index 14f919d057..6592b2b21e 100644
--- a/src/graph/GraphBuilder.cpp
+++ b/src/graph/GraphBuilder.cpp
@@ -581,6 +581,20 @@ NodeID GraphBuilder::add_permute_node(Graph &g, NodeParams params, NodeIdxPair i
     return create_simple_single_input_output_node<PermuteLayerNode>(g, params, input, perm, layout);
 }
 
+NodeID GraphBuilder::add_prelu_node(Graph &g, NodeParams params, NodeIdxPair input, NodeIdxPair alpha)
+{
+    check_nodeidx_pair(input, g);
+    check_nodeidx_pair(alpha, g);
+
+    NodeID prelu_nid = g.add_node<PReluLayerNode>();
+    g.add_connection(input.node_id, input.index, prelu_nid, 0);
+    g.add_connection(alpha.node_id, alpha.index, prelu_nid, 1);
+
+    set_node_params(g, prelu_nid, params);
+
+    return prelu_nid;
+}
+
 NodeID GraphBuilder::add_pooling_node(Graph &g, NodeParams params, NodeIdxPair input, PoolingLayerInfo pool_info)
 {
     return create_simple_single_input_output_node<PoolingLayerNode>(g, params, input, pool_info);
diff --git a/src/graph/backends/CL/CLFunctionsFactory.cpp b/src/graph/backends/CL/CLFunctionsFactory.cpp
index c841126b1c..e6684f676d 100644
--- a/src/graph/backends/CL/CLFunctionsFactory.cpp
+++ b/src/graph/backends/CL/CLFunctionsFactory.cpp
@@ -272,6 +272,8 @@ std::unique_ptr<IFunction> CLFunctionFactory::create(INode *node, GraphContext &
             return detail::create_permute_layer<CLPermute, CLTargetInfo>(*polymorphic_downcast<PermuteLayerNode *>(node));
         case NodeType::PoolingLayer:
             return detail::create_pooling_layer<CLPoolingLayer, CLTargetInfo>(*polymorphic_downcast<PoolingLayerNode *>(node));
+        case NodeType::PReluLayer:
+            return detail::create_prelu_layer<CLPReluLayer, CLTargetInfo>(*polymorphic_downcast<PReluLayerNode *>(node));
         case NodeType::PrintLayer:
             return detail::create_print_layer<CLTargetInfo>(*polymorphic_downcast<PrintLayerNode *>(node));
         case NodeType::PriorBoxLayer:
diff --git a/src/graph/backends/CL/CLNodeValidator.cpp b/src/graph/backends/CL/CLNodeValidator.cpp
index 8ca58bc6e8..ddb8e3d1ac 100644
--- a/src/graph/backends/CL/CLNodeValidator.cpp
+++ b/src/graph/backends/CL/CLNodeValidator.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019 ARM Limited.
+ * Copyright (c) 2018-2020 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -73,6 +73,8 @@ Status CLNodeValidator::validate(INode *node)
             return detail::validate_pad_layer<CLPadLayer>(*polymorphic_downcast<PadLayerNode *>(node));
         case NodeType::PermuteLayer:
             return detail::validate_permute_layer<CLPermute>(*polymorphic_downcast<PermuteLayerNode *>(node));
+        case NodeType::PReluLayer:
+            return detail::validate_prelu_layer<CLPReluLayer>(*polymorphic_downcast<PReluLayerNode *>(node));
         case NodeType::PriorBoxLayer:
             return detail::validate_priorbox_layer<CLPriorBoxLayer>(*polymorphic_downcast<PriorBoxLayerNode *>(node));
         case NodeType::QuantizationLayer:
diff --git a/src/graph/backends/NEON/NEFunctionFactory.cpp b/src/graph/backends/NEON/NEFunctionFactory.cpp
index 3597139003..ddb4ccf391 100644
--- a/src/graph/backends/NEON/NEFunctionFactory.cpp
+++ b/src/graph/backends/NEON/NEFunctionFactory.cpp
@@ -231,6 +231,8 @@ std::unique_ptr<IFunction> NEFunctionFactory::create(INode *node, GraphContext &
             return detail::create_permute_layer<NEPermute, NETargetInfo>(*polymorphic_downcast<PermuteLayerNode *>(node));
         case NodeType::PoolingLayer:
             return detail::create_pooling_layer<NEPoolingLayer, NETargetInfo>(*polymorphic_downcast<PoolingLayerNode *>(node));
+        case NodeType::PReluLayer:
+            return detail::create_prelu_layer<NEPReluLayer, NETargetInfo>(*polymorphic_downcast<PReluLayerNode *>(node));
         case NodeType::PrintLayer:
             return detail::create_print_layer<NETargetInfo>(*polymorphic_downcast<PrintLayerNode *>(node));
         case NodeType::PriorBoxLayer:
diff --git a/src/graph/backends/NEON/NENodeValidator.cpp b/src/graph/backends/NEON/NENodeValidator.cpp
index ec8c0e5222..0a3107292b 100644
--- a/src/graph/backends/NEON/NENodeValidator.cpp
+++ b/src/graph/backends/NEON/NENodeValidator.cpp
@@ -73,6 +73,8 @@ Status NENodeValidator::validate(INode *node)
             return detail::validate_pad_layer<NEPadLayer>(*polymorphic_downcast<PadLayerNode *>(node));
         case NodeType::PermuteLayer:
             return detail::validate_permute_layer<NEPermute>(*polymorphic_downcast<PermuteLayerNode *>(node));
+        case NodeType::PReluLayer:
+            return detail::validate_prelu_layer<NEPReluLayer>(*polymorphic_downcast<PReluLayerNode *>(node));
         case NodeType::PriorBoxLayer:
             return detail::validate_priorbox_layer<NEPriorBoxLayer>(*polymorphic_downcast<PriorBoxLayerNode *>(node));
         case NodeType::QuantizationLayer:
diff --git a/src/graph/nodes/PReluLayerNode.cpp b/src/graph/nodes/PReluLayerNode.cpp
new file mode 100644
index 0000000000..9310aaf727
--- /dev/null
+++ b/src/graph/nodes/PReluLayerNode.cpp
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2020 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "arm_compute/graph/nodes/PReluLayerNode.h"
+
+#include "arm_compute/graph/Graph.h"
+#include "arm_compute/graph/INodeVisitor.h"
+
+namespace arm_compute
+{
+namespace graph
+{
+PReluLayerNode::PReluLayerNode()
+{
+    _input_edges.resize(2, EmptyEdgeID);
+    _outputs.resize(1, NullTensorID);
+}
+
+bool PReluLayerNode::forward_descriptors()
+{
+    if((input_id(0) != NullTensorID) && (output_id(0) != NullTensorID))
+    {
+        Tensor *dst = output(0);
+        ARM_COMPUTE_ERROR_ON(dst == nullptr);
+        dst->desc() = configure_output(0);
+        return true;
+    }
+    return false;
+}
+
+TensorDescriptor PReluLayerNode::configure_output(size_t idx) const
+{
+    ARM_COMPUTE_UNUSED(idx);
+
+    const Tensor *src = input(0);
+    ARM_COMPUTE_ERROR_ON(src == nullptr);
+
+    return src->desc();
+}
+
+NodeType PReluLayerNode::type() const
+{
+    return NodeType::PReluLayer;
+}
+
+void PReluLayerNode::accept(INodeVisitor &v)
+{
+    v.visit(*this);
+}
+} // namespace graph
+} // namespace arm_compute