From c30b668bf7b3e7f841ea8ef9295f43fc69519e15 Mon Sep 17 00:00:00 2001
From: Michele Di Giorgio <michele.digiorgio@arm.com>
Date: Wed, 12 Sep 2018 17:44:08 +0100
Subject: COMPMID-1576: Add SliceLayer to graph API

Change-Id: I42260cc529ca7721e221d3d0576b1668e09f8307
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/148255
Tested-by: bsgcomp <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
---
 src/graph/nodes/SliceLayerNode.cpp | 100 +++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 src/graph/nodes/SliceLayerNode.cpp

(limited to 'src/graph/nodes/SliceLayerNode.cpp')

diff --git a/src/graph/nodes/SliceLayerNode.cpp b/src/graph/nodes/SliceLayerNode.cpp
new file mode 100644
index 0000000000..3a29e4c9ad
--- /dev/null
+++ b/src/graph/nodes/SliceLayerNode.cpp
@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2018 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/SliceLayerNode.h"
+
+#include "arm_compute/core/Utils.h"
+#include "arm_compute/core/utils/helpers/tensor_transform.h"
+#include "arm_compute/graph/Graph.h"
+#include "arm_compute/graph/INodeVisitor.h"
+
+namespace arm_compute
+{
+namespace graph
+{
+SliceLayerNode::SliceLayerNode(Coordinates &starts, Coordinates &ends)
+    : _starts(starts), _ends(ends)
+{
+    _input_edges.resize(1, EmptyEdgeID);
+    _outputs.resize(1, NullTensorID);
+}
+
+Coordinates SliceLayerNode::starts() const
+{
+    return _starts;
+}
+
+Coordinates SliceLayerNode::ends() const
+{
+    return _ends;
+}
+
+TensorDescriptor SliceLayerNode::compute_output_descriptor(const TensorDescriptor &input_descriptor,
+                                                           const Coordinates &starts, const Coordinates &ends)
+{
+    // Get absolute end coordinates
+    const Coordinates ends_abs = arm_compute::helpers::tensor_transform::slice_absolute_end_coords(input_descriptor.shape, ends);
+
+    TensorDescriptor output_descriptor = input_descriptor;
+    for(unsigned int i = 0; i < starts.num_dimensions(); ++i)
+    {
+        output_descriptor.shape.set(i, ends_abs[i] - starts[i]);
+    }
+
+    return output_descriptor;
+}
+
+bool SliceLayerNode::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 SliceLayerNode::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);
+}
+
+NodeType SliceLayerNode::type() const
+{
+    return NodeType::SliceLayer;
+}
+
+void SliceLayerNode::accept(INodeVisitor &v)
+{
+    v.visit(*this);
+}
+} // namespace graph
+} // namespace arm_compute
-- 
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