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, 25 insertions, 3 deletions

diff --git a/src/armnnSerializer/ArmnnSchema.fbs b/src/armnnSerializer/ArmnnSchema.fbs
index 1f71ce19f2..aa539b188f 100644
--- a/src/armnnSerializer/ArmnnSchema.fbs
+++ b/src/armnnSerializer/ArmnnSchema.fbs
@@ -47,6 +47,13 @@ enum DataLayout : byte {
     NCHW = 1
 }
 
+enum ReduceOperation: byte {
+    Sum  = 0,
+    Max  = 1,
+    Mean = 2,
+    Min  = 3
+}
+
 enum ResizeMethod: byte {
     NearestNeighbor = 0,
     Bilinear = 1,
@@ -160,7 +167,8 @@ enum LayerType : uint {
     QLstm = 56,
     Fill = 57,
     Rank = 58,
-    LogicalBinary = 59
+    LogicalBinary = 59,
+    Reduce = 60
 }
 
 // Base layer table to be used as part of other layers
@@ -881,6 +889,19 @@ table RankLayer {
     base:LayerBase;
 }
 
+table ReduceLayer {
+    base:LayerBase;
+    descriptor:ReduceDescriptor;
+}
+
+table ReduceDescriptor {
+    targetHeight:uint;
+    targetWidth:uint;
+    keepDims:bool = false;
+    axis:[uint];
+    reduceOperation:ReduceOperation = Sum;
+}
+
 union Layer {
     ActivationLayer,
     AdditionLayer,
@@ -941,7 +962,8 @@ union Layer {
     QLstmLayer,
     FillLayer,
     RankLayer,
-    LogicalBinaryLayer
+    LogicalBinaryLayer,
+    ReduceLayer
 }
 
 table AnyLayer {
@@ -960,4 +982,4 @@ table SerializedGraph {
     featureVersions:FeatureCompatibilityVersions;
 }
 
-root_type SerializedGraph;
\ No newline at end of file
+root_type SerializedGraph;