backends/reference: Add ReduceSum operation support

This patch addes ReduceSum operation support for reference backend,
which computes the sum of elements across dimensions of a tensor.

Changelog v1:
- Fix file header descriptions.

Chagelog v2:
- Fix line limit issue.
- Fix type conversion issue.

Changelog v3:
- Remove tabs.
- Modify newly added file headers.

Changelog v4:
- Symbol on header isn't allowed so drop it from newly added file headers.

Changelog v5:
- Remove tabs, fix the use of brackets and align lines correctly.

Changelog v6:
- Add serializer and deserializer support.

Changelog v7:
- Fix build error add missed code.

Changelog v8:
- Rename ReduceSumDecriptor to ReduceDescriptor
    - Update m_KeepDims field data type to bool on ReduceDescriptor
    - Add ReduceOperation field to ReduceDescriptor

- Rename ReduceSumLayer to ReduceLayer
    - Update ReduceLayer to use ReduceDescriptor
    - Update ReduceLayer::ValidateTensorShapesFromInputs() function

- Rename RefReduceSumWokload to RefReduceWorkload
    - Update workload to use ReduceDescriptor
    - Update workload to use Decoders and Encoders

- Remove ReduceSum.hpp and ReduceSum.cpp
- Added Reduce.hpp and Reduce.cpp
     - Move Mean.cpp (which is implementing REDUCE_MEAN) functionality to Reduce.cpp
     - Update RefMeanWorkload to call Reduce function with ReduceOperation::Mean argument

- Remove Mean.hpp and Mean.cpp
- Update the Serializer/Deserializer ArmnnSchema.fbs for ReduceLayer, ReduceDescriptor, and ReduceOperation
- Update Serializer and Deserializer for serializing/parsing ReduceLayer
- Added TfLiter parser Sum test for REDUCE_SUM operator
- Make corresponding changes on front-end and Ref backend to support REDUCE_SUM operator

Changelog v9:
- Fixed build errors.

Change-Id: I8c8e034f3df73f9565b3c18eff51ecca6c542195
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Sadik Armagan <sadik.armagan@arm.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/src/armnnSerializer/SerializerUtils.cpp b/src/armnnSerializer/SerializerUtils.cpp
index 045d6aac5c..32ac75e024 100644
--- a/src/armnnSerializer/SerializerUtils.cpp
+++ b/src/armnnSerializer/SerializerUtils.cpp
@@ -198,4 +198,21 @@ armnnSerializer::ResizeMethod GetFlatBufferResizeMethod(armnn::ResizeMethod meth
     }
 }
 
+armnnSerializer::ReduceOperation GetFlatBufferReduceOperation(armnn::ReduceOperation reduceOperation)
+{
+    switch (reduceOperation)
+    {
+        case armnn::ReduceOperation::Sum:
+            return armnnSerializer::ReduceOperation::ReduceOperation_Sum;
+        case armnn::ReduceOperation::Max:
+            return armnnSerializer::ReduceOperation::ReduceOperation_Max;
+        case armnn::ReduceOperation::Mean:
+            return armnnSerializer::ReduceOperation::ReduceOperation_Mean;
+        case armnn::ReduceOperation::Min:
+            return armnnSerializer::ReduceOperation::ReduceOperation_Min;
+        default:
+            return armnnSerializer::ReduceOperation::ReduceOperation_Sum;
+    }
+}
+
 } // namespace armnnSerializer