IVGCVSW-7133 Add TosaMappings backbone structure with support for Addition TosaMappings operator.

Signed-off-by: Cathal Corbett <cathal.corbett@arm.com>
Change-Id: Ibea0cf625b3af4ab38e8b985f7a129c983ca9659

3 files changed, 126 insertions, 0 deletions

diff --git a/src/backends/tosaCommon/operatorMappings/AdditionOperator.hpp b/src/backends/tosaCommon/operatorMappings/AdditionOperator.hpp
new file mode 100644
index 0000000000..98c01e2cb8
--- /dev/null
+++ b/src/backends/tosaCommon/operatorMappings/AdditionOperator.hpp
@@ -0,0 +1,52 @@
+//
+// Copyright © 2022 Arm Ltd and Contributors. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include <Layer.hpp>
+
+#include <tosa_serialization_handler.h>
+#include "TosaOperatorUtils.hpp"
+
+using namespace armnn;
+using namespace tosa;
+
+TosaSerializationBasicBlock* ConvertAdditionToTosaOperator(const std::vector<const TensorInfo*>& inputs,
+                                                          const std::vector<const TensorInfo*>& outputs)
+{
+    // A helper function with static global variables ensures uniqueness
+    // for dynamically generating input, output and block names
+    std::string input0Name = std::string("Op_ADD_input0_")  + GetUniqueTosaMappingID();
+    std::string input1Name = std::string("Op_ADD_input1_")  + GetUniqueTosaMappingID();
+    std::string outputName = std::string("Op_ADD_output0_") + GetUniqueTosaMappingID();
+    std::string blockName  = std::string("Op_ADD_block_")   + GetUniqueTosaMappingID();
+
+    TosaSerializationOperator* op = new TosaSerializationOperator(Op_ADD,
+                                                                  Attribute_NONE,
+                                                                  nullptr,
+                                                                  {input0Name, input1Name},
+                                                                  {outputName});
+
+    std::vector<int32_t> inputShape0 = GetTosaTensorShape(inputs[0]->GetShape());
+    DType inputDType0 = ArmNNToDType(inputs[0]->GetDataType());
+
+    std::vector<int32_t> inputShape1 = GetTosaTensorShape(inputs[1]->GetShape());
+    DType inputDType1 = ArmNNToDType(inputs[1]->GetDataType());
+
+    std::vector<int32_t> outputShape0 = GetTosaTensorShape(outputs[0]->GetShape());
+    DType outputDType0 = ArmNNToDType(outputs[0]->GetDataType());
+
+    TosaSerializationTensor* inputTensor0  = new TosaSerializationTensor(input0Name, inputShape0, inputDType0, {});
+    TosaSerializationTensor* inputTensor1  = new TosaSerializationTensor(input1Name, inputShape1, inputDType1, {});
+    TosaSerializationTensor* outputTensor0 = new TosaSerializationTensor(outputName, outputShape0, outputDType0, {});
+
+    // operatorInputNames/operatorOutputNames ends up being the same as
+    // blockInputNames/blockOutputNames for one-to-one ArmNN to Tosa mappings
+    return new TosaSerializationBasicBlock(blockName, // name
+                                           {op}, // operators
+                                           {inputTensor0, inputTensor1, outputTensor0}, // tensors
+                                           {input0Name, input1Name}, // inputs
+                                           {outputName}); // outputs
+}
diff --git a/src/backends/tosaCommon/operatorMappings/CMakeLists.txt b/src/backends/tosaCommon/operatorMappings/CMakeLists.txt
new file mode 100644
index 0000000000..3965a6ab04
--- /dev/null
+++ b/src/backends/tosaCommon/operatorMappings/CMakeLists.txt
@@ -0,0 +1,14 @@
+#
+# Copyright © 2022 Arm Ltd and Contributors. All rights reserved.
+# SPDX-License-Identifier: MIT
+#
+
+list(APPEND armnnTosaBackendOperators_sources
+        AdditionOperator.hpp
+        TosaOperatorUtils.hpp
+    )
+
+add_library(armnnTosaBackendOperators OBJECT ${armnnTosaBackendOperators_sources})
+target_include_directories(armnnTosaBackendOperators PRIVATE ${PROJECT_SOURCE_DIR}/src/armnn)
+target_include_directories(armnnTosaBackendOperators PRIVATE ${PROJECT_SOURCE_DIR}/src/armnnUtils)
+target_include_directories(armnnTosaBackendOperators PRIVATE ${PROJECT_SOURCE_DIR}/src/backends)
diff --git a/src/backends/tosaCommon/operatorMappings/TosaOperatorUtils.hpp b/src/backends/tosaCommon/operatorMappings/TosaOperatorUtils.hpp
new file mode 100644
index 0000000000..b887721648
--- /dev/null
+++ b/src/backends/tosaCommon/operatorMappings/TosaOperatorUtils.hpp
@@ -0,0 +1,60 @@
+//
+// Copyright © 2022 Arm Ltd and Contributors. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include <armnn/Tensor.hpp>
+#include <armnn/Types.hpp>
+
+#include <tosa_generated.h>
+
+using namespace armnn;
+using namespace tosa;
+
+// Function to return Tosa datatype from input ArmNN datatype.
+DType ArmNNToDType(const DataType& type)
+{
+    switch (type)
+    {
+        case DataType::Float16:
+        case DataType::Float32:
+        case DataType::BFloat16:
+            return DType_FLOAT;
+        case DataType::QAsymmU8:
+            return DType_UINT8;
+        case DataType::QSymmS8:
+        case DataType::QAsymmS8:
+            return DType_INT8;
+        case DataType::QSymmS16:
+            return DType_INT16;
+        case DataType::Signed32:
+            return DType_INT32;
+        case DataType::Signed64:
+            // No signed 64, only DType_INT48.
+            return DType_UNKNOWN;
+        case DataType::Boolean:
+            return DType_BOOL;
+        default:
+            return DType_UNKNOWN;
+    }
+}
+
+// Function to return Tosa tensor shape from input ArmNN tensor shape.
+std::vector<int32_t> GetTosaTensorShape(const TensorShape& shape)
+{
+    std::vector<int32_t> returnShape;
+    for (u_int32_t i = 0; i < shape.GetNumDimensions(); i++)
+    {
+        returnShape.push_back(static_cast<int32_t>(shape[i]));
+    }
+    return returnShape;
+}
+
+// Function to return unique int as a string to ensure uniqueness between all input, output and block names.
+static int uniqueTosaMappingID = 0;
+std::string GetUniqueTosaMappingID()
+{
+    return std::to_string(++uniqueTosaMappingID);
+}