IVGCVSW-7555 Restructure Delegate

* New folders created:
  * common is for common code where TfLite API is not used
  * classic is for existing delegate implementations
  * opaque is for new opaque delegate implementation,
  * tests is for shared between existing Delegate and Opaque Delegate which have test utils to work which delegate to use.
* Existing delegate is built to libarmnnDelegate.so and opaque delegate is built as libarmnnOpaqueDelegate.so
* Opaque structure is introduced but no API is added yet.
* CmakeList.txt and delegate/CMakeList.txt have been modified and 2 new CmakeList.txt added
* Rename BUILD_ARMNN_TFLITE_DELEGATE as BUILD_CLASSIC_DELEGATE
* Rename BUILD_ARMNN_TFLITE_OPAQUE_DELEGATE as BUILD_OPAQUE_DELEGATE

Signed-off-by: Teresa Charlin <teresa.charlinreyes@arm.com>
Change-Id: Ib682b9ad0ac8d8acdc4ec6d9099bb0008a9fe8ed

1 files changed, 116 insertions, 0 deletions

diff --git a/delegate/classic/src/SharedFunctions.cpp b/delegate/classic/src/SharedFunctions.cpp
new file mode 100644
index 0000000000..8de7d9c933
--- /dev/null
+++ b/delegate/classic/src/SharedFunctions.cpp
@@ -0,0 +1,116 @@
+//
+// Copyright © 2021-2023 Arm Ltd and Contributors. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+
+#include "SharedFunctions.hpp"
+
+#include <DelegateUtils.hpp>
+
+#include "tensorflow/lite/builtin_ops.h"
+#include "tensorflow/lite/c/builtin_op_data.h"
+#include "tensorflow/lite/c/common.h"
+#include "tensorflow/lite/minimal_logging.h"
+
+namespace armnnDelegate
+{
+
+TfLiteStatus ValidateFloorOperator(DelegateData& delegateData,
+                                   TfLiteContext* tfLiteContext,
+                                   const armnn::TensorInfo& inputTensorInfo,
+                                   const armnn::TensorInfo& outputTensorInfo)
+{
+    bool isSupported = false;
+    auto validateFunc = [&](const armnn::TensorInfo& outInfo, bool& isSupported)
+    {
+        FORWARD_LAYER_SUPPORT_FUNC("FLOOR",
+                                   tfLiteContext,
+                                   IsFloorSupported,
+                                   delegateData.m_Backends,
+                                   isSupported,
+                                   armnn::BackendId(),
+                                   inputTensorInfo,
+                                   outInfo);
+    };
+    validateFunc(outputTensorInfo, isSupported);
+    return isSupported ? kTfLiteOk : kTfLiteError;
+}
+
+TfLiteStatus ValidateFusedActivationOperator(DelegateData& delegateData,
+                                             TfLiteContext* tfLiteContext,
+                                             const armnn::TensorInfo& inputInfo,
+                                             const armnn::TensorInfo& outputInfo,
+                                             TfLiteFusedActivation activationType)
+{
+    armnn::ActivationDescriptor activationDesc;
+
+    switch (activationType)
+    {
+        case kTfLiteActNone:
+        {
+            // No Activation
+            return kTfLiteOk;
+        }
+        case kTfLiteActRelu:
+        {
+            activationDesc.m_Function = armnn::ActivationFunction::ReLu;
+            break;
+        }
+// The name of kTfLiteActRelu1 changed after TF Lite v2.3
+#if defined(ARMNN_POST_TFLITE_2_3)
+        case kTfLiteActReluN1To1:
+#else
+            case kTfLiteActRelu1:
+#endif
+        {
+            activationDesc.m_Function = armnn::ActivationFunction::BoundedReLu;
+            activationDesc.m_A = 1.0f;
+            activationDesc.m_B = -1.0f;
+            break;
+        }
+        case kTfLiteActRelu6:
+        {
+            activationDesc.m_Function = armnn::ActivationFunction::BoundedReLu;
+            activationDesc.m_A = 6.0f;
+            activationDesc.m_B = 0.0f;
+            break;
+        }
+        case kTfLiteActSigmoid:
+        {
+            activationDesc.m_Function = armnn::ActivationFunction::Sigmoid;
+            break;
+        }
+        case kTfLiteActTanh:
+        {
+            activationDesc.m_Function = armnn::ActivationFunction::TanH;
+            activationDesc.m_A = 1.0f;
+            activationDesc.m_B = 1.0f;
+            break;
+        }
+        default:
+            return kTfLiteError;
+    }
+
+    bool isSupported = false;
+    armnn::BackendId setBackend;
+
+    auto validateFunc = [&](const armnn::TensorInfo& outputInfo, bool& isSupported)
+    {
+        FORWARD_LAYER_SUPPORT_FUNC("ACTIVATION",
+                                   tfLiteContext,
+                                   IsActivationSupported,
+                                   delegateData.m_Backends,
+                                   isSupported,
+                                   armnn::BackendId(),
+                                   inputInfo,
+                                   outputInfo,
+                                   activationDesc);
+    };
+    validateFunc(outputInfo, isSupported);
+    return isSupported ? kTfLiteOk : kTfLiteError;
+}
+
+
+} // namespace armnnDelegate
+