Add ArgMinMax layer node to Graph API

Change-Id: I2ccb2c65edd2932b76e905af3d747324b65c2f7f
Signed-off-by: thecha01 <theo.charalambous@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/3910
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>

3 files changed, 83 insertions, 0 deletions

diff --git a/arm_compute/graph/nodes/ArgMinMaxLayerNode.h b/arm_compute/graph/nodes/ArgMinMaxLayerNode.h
new file mode 100644
index 0000000000..69191add99
--- /dev/null
+++ b/arm_compute/graph/nodes/ArgMinMaxLayerNode.h
@@ -0,0 +1,81 @@
+/*
+ * 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.
+ */
+#ifndef ARM_COMPUTE_GRAPH_ARGMINMAX_LAYER_NODE_H
+#define ARM_COMPUTE_GRAPH_ARGMINMAX_LAYER_NODE_H
+
+#include "arm_compute/graph/INode.h"
+
+namespace arm_compute
+{
+namespace graph
+{
+/** Arg Min/Max Layer node */
+class ArgMinMaxLayerNode final : public INode
+{
+public:
+    /** Constructor
+     *
+     * @param[in] op             Operation to perform: min or max
+     * @param[in] axis           Axis along which to reduce. Supported reduction axis : 0,1,2,3
+     * @param[in] out_data_type  (Optional) Output data type
+     * @param[in] out_quant_info (Optional) Output quantization info
+     */
+    ArgMinMaxLayerNode(ReductionOperation op,
+                       unsigned int       axis,
+                       DataType           out_data_type  = DataType::UNKNOWN,
+                       QuantizationInfo   out_quant_info = QuantizationInfo());
+    /** Operator accessor
+     *
+     * @return The operator the layer performs: min or max
+     */
+    ReductionOperation reduction_operation() const;
+    /** Axis accessor
+     *
+     * @return The axis along which the reduction is operating
+     */
+    unsigned int axis() const;
+    /** Output data type accessor
+     *
+     * @return The output data type
+     */
+    DataType out_data_type() const;
+
+    // Inherited overridden methods:
+    NodeType         type() const override;
+    bool             forward_descriptors() override;
+    TensorDescriptor configure_output(size_t idx) const override;
+    void accept(INodeVisitor &v) override;
+
+public:
+    static constexpr NodeType node_type = NodeType::ArgMinMaxLayer;
+
+private:
+    ReductionOperation _op;
+    unsigned int       _axis;
+    DataType           _out_data_type;
+    QuantizationInfo   _out_quant_info;
+};
+} // namespace graph
+} // namespace arm_compute
+#endif /* ARM_COMPUTE_GRAPH_ARGMINMAX_LAYER_NODE_H */
diff --git a/arm_compute/graph/nodes/Nodes.h b/arm_compute/graph/nodes/Nodes.h
index 0e4ccd067d..2b400a9140 100644
--- a/arm_compute/graph/nodes/Nodes.h
+++ b/arm_compute/graph/nodes/Nodes.h
@@ -25,6 +25,7 @@
 #define ARM_COMPUTE_GRAPH_NODES_H
 
 #include "arm_compute/graph/nodes/ActivationLayerNode.h"
+#include "arm_compute/graph/nodes/ArgMinMaxLayerNode.h"
 #include "arm_compute/graph/nodes/BatchNormalizationLayerNode.h"
 #include "arm_compute/graph/nodes/BoundingBoxTransformLayerNode.h"
 #include "arm_compute/graph/nodes/ChannelShuffleLayerNode.h"
diff --git a/arm_compute/graph/nodes/NodesFwd.h b/arm_compute/graph/nodes/NodesFwd.h
index f829955fb1..8692476a09 100644
--- a/arm_compute/graph/nodes/NodesFwd.h
+++ b/arm_compute/graph/nodes/NodesFwd.h
@@ -31,6 +31,7 @@ namespace graph
 // Forward declarations
 class INode;
 class ActivationLayerNode;
+class ArgMinMaxLayerNode;
 class BatchNormalizationLayerNode;
 class BoundingBoxTransformLayerNode;
 class ChannelShuffleLayerNode;