Add StridedSliceLayerNode to graph API

Signed-off-by: thecha01 <theo.charalambous@arm.com>
Change-Id: I6d6fb2b053c74e35a86841621486bc0cd34b12b3
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/3911
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>

6 files changed, 126 insertions, 0 deletions

diff --git a/src/graph/GraphBuilder.cpp b/src/graph/GraphBuilder.cpp
index 01520421f0..a3953329d2 100644
--- a/src/graph/GraphBuilder.cpp
+++ b/src/graph/GraphBuilder.cpp
@@ -706,6 +706,11 @@ NodeID GraphBuilder::add_split_node(Graph &g, NodeParams params, NodeIdxPair inp
     return create_simple_single_input_output_node<SplitLayerNode>(g, params, input, num_splits, axis);
 }
 
+NodeID GraphBuilder::add_strided_slice_node(Graph &g, NodeParams params, NodeIdxPair input, Coordinates &starts, Coordinates &ends, BiStrides &strides, StridedSliceLayerInfo info)
+{
+    return create_simple_single_input_output_node<StridedSliceLayerNode>(g, params, input, starts, ends, strides, info);
+}
+
 NodeID GraphBuilder::add_stack_node(Graph &g, NodeParams params, const std::vector<NodeIdxPair> &inputs, int axis)
 {
     return create_simple_multiple_input_single_output_node<StackLayerNode>(g, params, inputs, inputs.size(), axis);
diff --git a/src/graph/backends/CL/CLFunctionsFactory.cpp b/src/graph/backends/CL/CLFunctionsFactory.cpp
index 59db9129ab..594ad0a05a 100644
--- a/src/graph/backends/CL/CLFunctionsFactory.cpp
+++ b/src/graph/backends/CL/CLFunctionsFactory.cpp
@@ -306,6 +306,8 @@ std::unique_ptr<IFunction> CLFunctionFactory::create(INode *node, GraphContext &
             return detail::create_softmax_layer<CLSoftmaxLayer, CLTargetInfo>(*polymorphic_downcast<SoftmaxLayerNode *>(node), ctx);
         case NodeType::StackLayer:
             return detail::create_stack_layer<CLStackLayer, CLTargetInfo>(*polymorphic_downcast<StackLayerNode *>(node));
+        case NodeType::StridedSliceLayer:
+            return detail::create_strided_slice_layer<CLStridedSlice, CLTargetInfo>(*polymorphic_downcast<StridedSliceLayerNode *>(node));
         case NodeType::UpsampleLayer:
             return detail::create_upsample_layer<CLUpsampleLayer, CLTargetInfo>(*polymorphic_downcast<UpsampleLayerNode *>(node), ctx);
         case NodeType::YOLOLayer:
diff --git a/src/graph/backends/CL/CLNodeValidator.cpp b/src/graph/backends/CL/CLNodeValidator.cpp
index ee77d58052..08d2f917ca 100644
--- a/src/graph/backends/CL/CLNodeValidator.cpp
+++ b/src/graph/backends/CL/CLNodeValidator.cpp
@@ -104,6 +104,8 @@ Status CLNodeValidator::validate(INode *node)
             return detail::validate_roi_align_layer<CLROIAlignLayer>(*polymorphic_downcast<ROIAlignLayerNode *>(node));
         case NodeType::SliceLayer:
             return detail::validate_slice_layer<CLSlice>(*polymorphic_downcast<SliceLayerNode *>(node));
+        case NodeType::StridedSliceLayer:
+            return detail::validate_strided_slice_layer<CLStridedSlice>(*polymorphic_downcast<StridedSliceLayerNode *>(node));
         case NodeType::UpsampleLayer:
             return detail::validate_upsample_layer<CLUpsampleLayer>(*polymorphic_downcast<UpsampleLayerNode *>(node));
         case NodeType::YOLOLayer:
diff --git a/src/graph/backends/NEON/NEFunctionFactory.cpp b/src/graph/backends/NEON/NEFunctionFactory.cpp
index d292977665..82f1abba9e 100644
--- a/src/graph/backends/NEON/NEFunctionFactory.cpp
+++ b/src/graph/backends/NEON/NEFunctionFactory.cpp
@@ -189,6 +189,8 @@ std::unique_ptr<IFunction> NEFunctionFactory::create(INode *node, GraphContext &
             return detail::create_softmax_layer<NESoftmaxLayer, NETargetInfo>(*polymorphic_downcast<SoftmaxLayerNode *>(node), ctx);
         case NodeType::StackLayer:
             return detail::create_stack_layer<NEStackLayer, NETargetInfo>(*polymorphic_downcast<StackLayerNode *>(node));
+        case NodeType::StridedSliceLayer:
+            return detail::create_strided_slice_layer<NEStridedSlice, NETargetInfo>(*polymorphic_downcast<StridedSliceLayerNode *>(node));
         case NodeType::UpsampleLayer:
             return detail::create_upsample_layer<NEUpsampleLayer, NETargetInfo>(*polymorphic_downcast<UpsampleLayerNode *>(node), ctx);
         case NodeType::YOLOLayer:
diff --git a/src/graph/backends/NEON/NENodeValidator.cpp b/src/graph/backends/NEON/NENodeValidator.cpp
index 0f860b63f3..46f0051468 100644
--- a/src/graph/backends/NEON/NENodeValidator.cpp
+++ b/src/graph/backends/NEON/NENodeValidator.cpp
@@ -104,6 +104,8 @@ Status NENodeValidator::validate(INode *node)
             return ARM_COMPUTE_CREATE_ERROR(arm_compute::ErrorCode::RUNTIME_ERROR, "Unsupported operation : ROIAlignLayer");
         case NodeType::SliceLayer:
             return ARM_COMPUTE_CREATE_ERROR(arm_compute::ErrorCode::RUNTIME_ERROR, "Unsupported operation : SliceLayer");
+        case NodeType::StridedSliceLayer:
+            return detail::validate_strided_slice_layer<NEStridedSlice>(*polymorphic_downcast<StridedSliceLayerNode *>(node));
         case NodeType::UpsampleLayer:
             return detail::validate_upsample_layer<NEUpsampleLayer>(*polymorphic_downcast<UpsampleLayerNode *>(node));
         case NodeType::YOLOLayer:
diff --git a/src/graph/nodes/StridedSliceLayerNode.cpp b/src/graph/nodes/StridedSliceLayerNode.cpp
new file mode 100644
index 0000000000..6a1a724bb3
--- /dev/null
+++ b/src/graph/nodes/StridedSliceLayerNode.cpp
@@ -0,0 +1,113 @@
+/*
+ * 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/StridedSliceLayerNode.h"
+
+#include "arm_compute/core/Utils.h"
+#include "arm_compute/core/utils/misc/ShapeCalculator.h"
+#include "arm_compute/graph/Graph.h"
+#include "arm_compute/graph/INodeVisitor.h"
+
+namespace arm_compute
+{
+namespace graph
+{
+StridedSliceLayerNode::StridedSliceLayerNode(const Coordinates    &starts,
+                                             const Coordinates    &ends,
+                                             const BiStrides      &strides,
+                                             StridedSliceLayerInfo info)
+    : _starts(starts), _ends(ends), _strides(strides), _info(std::move(info))
+{
+    _input_edges.resize(1, EmptyEdgeID);
+    _outputs.resize(1, NullTensorID);
+}
+
+Coordinates StridedSliceLayerNode::starts() const
+{
+    return _starts;
+}
+
+Coordinates StridedSliceLayerNode::ends() const
+{
+    return _ends;
+}
+
+BiStrides StridedSliceLayerNode::strides() const
+{
+    return _strides;
+}
+
+StridedSliceLayerInfo StridedSliceLayerNode::strided_slice_info() const
+{
+    return _info;
+}
+
+TensorDescriptor StridedSliceLayerNode::compute_output_descriptor(const TensorDescriptor &input_descriptor,
+                                                                  const Coordinates      &starts,
+                                                                  const Coordinates      &ends,
+                                                                  const BiStrides        &strides,
+                                                                  StridedSliceLayerInfo   info)
+{
+    using namespace arm_compute::helpers::tensor_transform;
+
+    TensorDescriptor output_desc = input_descriptor;
+    output_desc.shape            = compute_strided_slice_output_shape(input_descriptor.shape, starts, ends, strides,
+                                                                      info.begin_mask(), info.end_mask(), info.shrink_axis_mask());
+
+    return output_desc;
+}
+
+bool StridedSliceLayerNode::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 StridedSliceLayerNode::configure_output(size_t idx) const
+{
+    ARM_COMPUTE_UNUSED(idx);
+    ARM_COMPUTE_ERROR_ON(idx >= _outputs.size());
+
+    const Tensor *src = input(0);
+    ARM_COMPUTE_ERROR_ON(src == nullptr);
+
+    return compute_output_descriptor(src->desc(), _starts, _ends, _strides, _info);
+}
+
+NodeType StridedSliceLayerNode::type() const
+{
+    return NodeType::StridedSliceLayer;
+}
+
+void StridedSliceLayerNode::accept(INodeVisitor &v)
+{
+    v.visit(*this);
+}
+} // namespace graph
+} // namespace arm_compute