IVGCVSW-6856 Add GATHERNd FrontEnd and Ref Implementation
* Add front end
* Add reference workload
* Add unit tests
* Add EndToEnd test
Signed-off-by: Teresa Charlin <teresa.charlinreyes@arm.com>
Change-Id: I4cebd17b18476df86162e2dda3366c10e80bd2f8
diff --git a/src/backends/reference/workloads/CMakeLists.txt b/src/backends/reference/workloads/CMakeLists.txt
index c18342f..b1f6d8b 100644
--- a/src/backends/reference/workloads/CMakeLists.txt
+++ b/src/backends/reference/workloads/CMakeLists.txt
@@ -118,6 +118,8 @@
RefFloorWorkload.hpp
RefFullyConnectedWorkload.cpp
RefFullyConnectedWorkload.hpp
+ RefGatherNdWorkload.cpp
+ RefGatherNdWorkload.hpp
RefGatherWorkload.cpp
RefGatherWorkload.hpp
RefInstanceNormalizationWorkload.cpp
diff --git a/src/backends/reference/workloads/RefGatherNdWorkload.cpp b/src/backends/reference/workloads/RefGatherNdWorkload.cpp
new file mode 100644
index 0000000..4c6b559
--- /dev/null
+++ b/src/backends/reference/workloads/RefGatherNdWorkload.cpp
@@ -0,0 +1,91 @@
+//
+// Copyright © 2022 Arm Ltd and Contributors. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#include "RefGatherNdWorkload.hpp"
+
+#include "Gather.hpp"
+#include "Profiling.hpp"
+#include "RefWorkloadUtils.hpp"
+#include "backendsCommon/WorkloadUtils.hpp"
+
+namespace armnn
+{
+
+void RefGatherNdWorkload::Execute() const
+{
+ Execute(m_Data.m_Inputs, m_Data.m_Outputs);
+}
+
+void RefGatherNdWorkload::ExecuteAsync(WorkingMemDescriptor &workingMemDescriptor)
+{
+ Execute(workingMemDescriptor.m_Inputs, workingMemDescriptor.m_Outputs);
+}
+
+void RefGatherNdWorkload::Execute(std::vector<ITensorHandle*> inputs, std::vector<ITensorHandle*> outputs) const
+{
+ ARMNN_SCOPED_PROFILING_EVENT(Compute::CpuRef, "RefGatherNdWorkload_Execute");
+
+ const TensorInfo& inputInfo0 = GetTensorInfo(inputs[0]);
+ const TensorInfo& inputInfo1 = GetTensorInfo(inputs[1]);
+ const TensorInfo& outputInfo = GetTensorInfo(outputs[0]);
+
+ std::unique_ptr<Decoder<float>> params_decoderPtr = MakeDecoder<float>(inputInfo0, inputs[0]->Map());
+
+ const int32_t* indicesDataPtr = reinterpret_cast<int32_t*>(inputs[1]->Map());
+ std::vector<int32_t> indices(indicesDataPtr, indicesDataPtr + inputInfo1.GetNumElements());
+
+ std::unique_ptr<Encoder<float>> output_encoderPtr = MakeEncoder<float>(outputInfo, outputs[0]->Map());
+
+ std::map<std::string, unsigned int> keyIndices = CalculateGatherNdKeyIndices(inputInfo0, inputInfo1);
+
+ /// Calculate flattened indices: flattenedIndices = indices * flattenedCoefficients
+ // Calculate the flattened coefficients to use in the multiplication
+ // to calculate the flattened indices needed by gather
+ TensorShape paramsShape = inputInfo0.GetShape();
+ std::vector<unsigned int> flattenedCoeff(keyIndices["ND"], 1);
+ for (unsigned int i = 1; i < keyIndices["ND"]; ++i)
+ {
+ flattenedCoeff[i-1] = paramsShape[i];
+ }
+ for (unsigned int i = keyIndices["ND"]-1; i > 0; --i)
+ {
+ flattenedCoeff[i-1] *= flattenedCoeff[i];
+ }
+
+ // Prepare the vector to store the output of the matrix multiplication,
+ // which will represent the flattened indices needed by gather
+ armnn::TensorInfo flattenedIndices_Info = inputInfo1;
+ flattenedIndices_Info.SetShape({ keyIndices["W"] });
+ std::vector<int32_t> flattenedIndices(flattenedIndices_Info.GetNumElements(), 0);
+
+ // Multiplication to calculate the flattened indices, which are the indices needed by gather.
+ for (unsigned int i = 0; i < keyIndices["W"]; ++i)
+ {
+ for (unsigned int j = 0; j < keyIndices["ND"]; ++j)
+ {
+ flattenedIndices[i] += indices[i * keyIndices["ND"] + j] * static_cast<int32_t>(flattenedCoeff[j]);
+ }
+ }
+
+ /// Call Gather with adequate shapes
+ // Reshape params into {K, C}
+ armnn::TensorInfo params_K_C_Info = inputInfo0;
+ params_K_C_Info.SetShape({ keyIndices["K"], keyIndices["C"] });
+
+ // Reshape indices into {N, W}
+ armnn::TensorInfo indices_N_W_Info = inputInfo1;
+ indices_N_W_Info.SetShape({ keyIndices["N"], keyIndices["W"] });
+
+ // Reshape output to have the shape given by gather {N, W, C}
+ // (the original outputInfo has the shape given by gatherNd)
+ armnn::TensorInfo outputGather_Info = outputInfo;
+ outputGather_Info.SetShape({ keyIndices["N"], keyIndices["W"], keyIndices["C"] });
+
+ // output_gather = gather(params_K_C, indices_N_W)
+ Gather(params_K_C_Info, indices_N_W_Info, outputGather_Info,
+ *params_decoderPtr, flattenedIndices.data(), *output_encoderPtr, 0);
+}
+
+} //namespace armnn
diff --git a/src/backends/reference/workloads/RefGatherNdWorkload.hpp b/src/backends/reference/workloads/RefGatherNdWorkload.hpp
new file mode 100644
index 0000000..a0d9158
--- /dev/null
+++ b/src/backends/reference/workloads/RefGatherNdWorkload.hpp
@@ -0,0 +1,24 @@
+//
+// Copyright © 2022 Arm Ltd and Contributors. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include "RefBaseWorkload.hpp"
+
+namespace armnn
+{
+
+class RefGatherNdWorkload : public RefBaseWorkload<GatherNdQueueDescriptor>
+{
+public:
+ using RefBaseWorkload<GatherNdQueueDescriptor>::RefBaseWorkload;
+ void Execute() const override;
+ void ExecuteAsync(WorkingMemDescriptor& workingMemDescriptor) override;
+private:
+ void Execute(std::vector<ITensorHandle*> inputs, std::vector<ITensorHandle*> outputs) const;
+
+};
+
+} // namespace armnn
diff --git a/src/backends/reference/workloads/RefGatherWorkload.cpp b/src/backends/reference/workloads/RefGatherWorkload.cpp
index be3274f..8ad36e4 100644
--- a/src/backends/reference/workloads/RefGatherWorkload.cpp
+++ b/src/backends/reference/workloads/RefGatherWorkload.cpp
@@ -1,5 +1,5 @@
//
-// Copyright © 2017 Arm Ltd and Contributors. All rights reserved.
+// Copyright © 2022 Arm Ltd and Contributors. All rights reserved.
// SPDX-License-Identifier: MIT
//
diff --git a/src/backends/reference/workloads/RefWorkloads.hpp b/src/backends/reference/workloads/RefWorkloads.hpp
index 700a1d6..3e83304 100644
--- a/src/backends/reference/workloads/RefWorkloads.hpp
+++ b/src/backends/reference/workloads/RefWorkloads.hpp
@@ -42,6 +42,7 @@
#include "RefFillWorkload.hpp"
#include "RefFloorWorkload.hpp"
#include "RefFullyConnectedWorkload.hpp"
+#include "RefGatherNdWorkload.hpp"
#include "RefGatherWorkload.hpp"
#include "RefInstanceNormalizationWorkload.hpp"
#include "RefL2NormalizationWorkload.hpp"