COMPMID-1151: Templatize FunctionFactories.

Change-Id: Id1c68c3bf442c3fcff265041b260d007db7593cb
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/134027
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>

1 files changed, 40 insertions, 643 deletions

diff --git a/src/graph/backends/CL/CLFunctionsFactory.cpp b/src/graph/backends/CL/CLFunctionsFactory.cpp
index 90ea81f21a..4d6734846a 100644
--- a/src/graph/backends/CL/CLFunctionsFactory.cpp
+++ b/src/graph/backends/CL/CLFunctionsFactory.cpp
@@ -25,16 +25,9 @@
 
 #include "arm_compute/core/utils/misc/Cast.h"
 #include "arm_compute/graph/Graph.h"
-#include "arm_compute/graph/GraphContext.h"
-#include "arm_compute/graph/Logger.h"
-#include "arm_compute/graph/TypePrinter.h"
-#include "arm_compute/graph/Types.h"
-#include "arm_compute/graph/backends/Utils.h"
-#include "arm_compute/graph/nodes/Nodes.h"
+#include "arm_compute/graph/backends/FunctionHelpers.h"
 #include "arm_compute/runtime/CL/CLFunctions.h"
 
-#include "support/ToolchainSupport.h"
-
 using namespace arm_compute::utils::cast;
 
 namespace arm_compute
@@ -43,634 +36,38 @@ namespace graph
 {
 namespace backends
 {
-namespace
-{
-/** Returns backing tensor of a given tensor
- *
- * @param[in] tensor Tensor to extract the backing tensor from
- *
- * @return Backing tensor if present else nullptr
- */
-arm_compute::ICLTensor *get_backing_tensor(arm_compute::graph::Tensor *tensor)
-{
-    arm_compute::ICLTensor *backing_tensor = nullptr;
-    if(tensor != nullptr)
-    {
-        ARM_COMPUTE_ERROR_ON(tensor->desc().target != arm_compute::graph::Target::CL);
-        // Get backing tensor handle
-        ITensorHandle *tensor_handle = tensor->handle();
-        // Get backing tensor
-        backing_tensor = (tensor_handle != nullptr) ? polymorphic_cast<ICLTensor *>(&tensor_handle->tensor()) : nullptr;
-    }
-
-    return backing_tensor;
-}
-
-/** Create a backend activation layer function
- *
- * @param[in] node Node to create the backend function for
- *
- * @return Backend activation layer function
- */
-std::unique_ptr<IFunction> create_activation_layer(ActivationLayerNode &node)
-{
-    ARM_COMPUTE_LOG_GRAPH_VERBOSE(
-        "Creating CL ActivationLayerNode node with ID : " << node.id() << " and Name: " << node.name()
-        << std::endl);
-    ARM_COMPUTE_ERROR_ON(node.num_inputs() != 1);
-    ARM_COMPUTE_ERROR_ON(node.num_outputs() != 1);
-
-    // Extract IO and info
-    ICLTensor                *input    = get_backing_tensor(node.input(0));
-    ICLTensor                *output   = get_backing_tensor(node.output(0));
-    const ActivationLayerInfo act_info = node.activation_info();
-
-    // Create function
-    auto func = support::cpp14::make_unique<CLActivationLayer>();
-    func->configure(input, output, act_info);
-
-    ARM_COMPUTE_LOG_GRAPH_INFO("Instantiated CLActivationLayer"
-                               << " Data Type: " << input->info()->data_type()
-                               << " Shape: " << input->info()->tensor_shape()
-                               << " Activation function: " << act_info.activation()
-                               << " a: " << act_info.a()
-                               << " b: " << act_info.b()
-                               << " InPlace : " << is_in_place_operation(input, output)
-                               << std::endl);
-
-    return std::move(func);
-}
-
-/** Create a backend batch normalization layer function
- *
- * @param[in] node Node to create the backend function for
- *
- * @return Backend batch normalization layer function
- */
-std::unique_ptr<IFunction> create_batch_normalization_layer(BatchNormalizationLayerNode &node)
+/** Target specific information structure used to pass information to the layer templates */
+struct CLTargetInfo
 {
-    ARM_COMPUTE_LOG_GRAPH_VERBOSE("Creating CL BatchNormalization node with ID : " << node.id() << " and Name: " << node.name() << std::endl);
-
-    // TODO (geopin01) : Var and mean are compulsory, switch function to accept nullptr as beta and/or gamma
-    ARM_COMPUTE_ERROR_ON(node.num_inputs() != 5);
-    ARM_COMPUTE_ERROR_ON(node.num_outputs() != 1);
-
-    // Extract IO and info
-    ICLTensor                *input     = get_backing_tensor(node.input(0));
-    ICLTensor                *mean      = get_backing_tensor(node.input(1));
-    ICLTensor                *var       = get_backing_tensor(node.input(2));
-    ICLTensor                *beta      = get_backing_tensor(node.input(3));
-    ICLTensor                *gamma     = get_backing_tensor(node.input(4));
-    ICLTensor                *output    = get_backing_tensor(node.output(0));
-    const float               epsilon   = node.epsilon();
-    const ActivationLayerInfo fused_act = node.fused_activation();
-
-    // Create and configure function
-    auto func = support::cpp14::make_unique<CLBatchNormalizationLayer>();
-    func->configure(input, output, mean, var, beta, gamma, epsilon, fused_act);
-
-    // Log info
-    ARM_COMPUTE_LOG_GRAPH_INFO("Instantiated CLBatchNormalizationLayer"
-                               << " Data Type: " << input->info()->data_type()
-                               << " Shape: " << input->info()->tensor_shape()
-                               << " Epsilon: " << epsilon << " "
-                               << (fused_act.enabled() ? to_string(fused_act.activation()) : "")
-                               << " InPlace : " << is_in_place_operation(input, output)
-                               << std::endl);
-
-    return std::move(func);
-}
-
-/** Create a backend channel shuffle layer function
- *
- * @param[in] node Node to create the backend function for
- *
- * @return Backend channel shuffle layer function
- */
-std::unique_ptr<IFunction> create_channel_shuffle_layer(ChannelShuffleLayerNode &node)
-{
-    ARM_COMPUTE_LOG_GRAPH_VERBOSE(
-        "Creating CL Channel Shuffle node with ID : " << node.id() << " and Name: " << node.name()
-        << std::endl);
-    ARM_COMPUTE_ERROR_ON(node.num_inputs() != 1);
-    ARM_COMPUTE_ERROR_ON(node.num_outputs() != 1);
-
-    // Extract IO and info
-    ICLTensor         *input      = get_backing_tensor(node.input(0));
-    ICLTensor         *output     = get_backing_tensor(node.output(0));
-    const unsigned int num_groups = node.num_groups();
-
-    // Create function
-    auto func = support::cpp14::make_unique<CLChannelShuffleLayer>();
-    func->configure(input, output, num_groups);
-
-    ARM_COMPUTE_LOG_GRAPH_INFO("Instantiated CLChannelShuffleLayer"
-                               << " Data Type: " << input->info()->data_type()
-                               << " Shape: " << input->info()->tensor_shape()
-                               << " Num groups: " << num_groups
-                               << std::endl);
-
-    return std::move(func);
-}
-
-/** Create a backend convolution layer function
- *
- * @param[in] node Node to create the backend function for
- *
- * @return Backend convolution layer function
- */
-std::unique_ptr<IFunction> create_convolution_layer(ConvolutionLayerNode &node, GraphContext &ctx)
-{
-    ARM_COMPUTE_LOG_GRAPH_VERBOSE("Creating CL ConvolutionLayer node with ID : " << node.id() << " and Name: " << node.name() << std::endl);
-    ARM_COMPUTE_ERROR_ON(node.num_inputs() != 3);
-    ARM_COMPUTE_ERROR_ON(node.num_outputs() != 1);
-
-    // Extract IO and info
-    ICLTensor *input   = get_backing_tensor(node.input(0));
-    ICLTensor *weights = get_backing_tensor(node.input(1));
-    ICLTensor *biases  = get_backing_tensor(node.input(2));
-    ICLTensor *output  = get_backing_tensor(node.output(0));
-
-    if(is_data_type_quantized_asymmetric(input->info()->data_type()))
-    {
-        biases->info()->set_data_type(DataType::S32);
-    }
-
-    const PadStrideInfo     conv_info      = node.convolution_info();
-    const ConvolutionMethod conv_algorithm = node.convolution_method();
-    const bool              fast_math      = node.fast_math_hint() == FastMathHint::ENABLED;
-
-    // Create and configure function (we assume that functions have been validated before creation)
-    std::shared_ptr<IMemoryManager> mm = get_memory_manager(ctx, Target::CL);
-    std::unique_ptr<IFunction>      func;
-    std::string                     func_name;
-
-    if(conv_algorithm == ConvolutionMethod::WINOGRAD)
-    {
-        std::tie(func, func_name) = create_named_memory_managed_function<CLWinogradConvolutionLayer>(
-                                        std::string("CLWinogradConvolutionLayer"), mm, input, weights, biases, output, conv_info, ActivationLayerInfo(), fast_math);
-    }
-    else if(conv_algorithm == ConvolutionMethod::DIRECT)
-    {
-        std::tie(func, func_name) = create_named_function<CLDirectConvolutionLayer>(
-                                        std::string("CLDirectConvolutionLayer"), input, weights, biases, output, conv_info);
-    }
-    else if(conv_algorithm == ConvolutionMethod::GEMM)
-    {
-        std::tie(func, func_name) = create_named_memory_managed_function<CLGEMMConvolutionLayer>(std::string("CLGEMMConvolutionLayer"), mm,
-                                                                                                 input, weights, biases, output, conv_info);
-    }
-    else
-    {
-        std::tie(func, func_name) = create_named_memory_managed_function<CLConvolutionLayer>(std::string("CLConvolutionLayer"), mm,
-                                                                                             input, weights, biases, output, conv_info, WeightsInfo(), Size2D(1U, 1U), ActivationLayerInfo(), fast_math);
-    }
+    using TensorType = arm_compute::ICLTensor;
+    static Target TargetType;
+};
 
-    // Log info
-    ARM_COMPUTE_LOG_GRAPH_INFO("Instantiated " << func_name
-                               << " Data Type: " << input->info()->data_type()
-                               << " Input QuantInfo: " << input->info()->quantization_info()
-                               << " Weights QuantInfo: " << weights->info()->quantization_info()
-                               << " Input shape: " << input->info()->tensor_shape()
-                               << " Weights shape: " << weights->info()->tensor_shape()
-                               << " Output shape: " << output->info()->tensor_shape()
-                               << std::endl);
-    return func;
-}
+Target CLTargetInfo::TargetType = Target::CL;
 
-/** Create a backend deconvolution layer function
- *
- * @param[in] node Node to create the backend function for
- *
- * @return Backend deconvolution layer function
- */
-std::unique_ptr<IFunction> create_deconvolution_layer(DeconvolutionLayerNode &node, GraphContext &ctx)
+/** Collection of CL convolution functions */
+struct CLConvolutionLayerFunctions
 {
-    ARM_COMPUTE_LOG_GRAPH_VERBOSE("Creating CL DeconvolutionLayer node with ID : " << node.id() << " and Name: " << node.name() << std::endl);
-    ARM_COMPUTE_ERROR_ON(node.num_inputs() != 3);
-    ARM_COMPUTE_ERROR_ON(node.num_outputs() != 1);
-
-    // Extract IO and info
-    ICLTensor *input   = get_backing_tensor(node.input(0));
-    ICLTensor *weights = get_backing_tensor(node.input(1));
-    ICLTensor *biases  = get_backing_tensor(node.input(2));
-    ICLTensor *output  = get_backing_tensor(node.output(0));
+    using GenericConvolutionLayer  = CLConvolutionLayer;
+    using GEMMConvolutionLayer     = CLGEMMConvolutionLayer;
+    using DirectConvolutionLayer   = CLDirectConvolutionLayer;
+    using WinogradConvolutionLayer = CLWinogradConvolutionLayer;
+};
 
-    const PadStrideInfo deconv_info  = node.deconvolution_info();
-    const Size2D        inner_border = node.inner_border();
-
-    // Create and configure function (we assume that functions have been validated before creation)
-    std::shared_ptr<IMemoryManager> mm = get_memory_manager(ctx, Target::CL);
-    std::unique_ptr<IFunction>      func;
-    std::string                     func_name;
-
-    std::tie(func, func_name) = create_named_memory_managed_function<CLDeconvolutionLayer>(std::string("CLDeconvolutionLayer"), mm,
-                                                                                           input, weights, biases, output,
-                                                                                           deconv_info, inner_border.x(), inner_border.y());
-
-    // Log info
-    ARM_COMPUTE_LOG_GRAPH_INFO("Instantiated " << func_name
-                               << " Data Type: " << input->info()->data_type()
-                               << " Input shape: " << input->info()->tensor_shape()
-                               << " Weights shape: " << weights->info()->tensor_shape()
-                               << " Output shape: " << output->info()->tensor_shape()
-                               << std::endl);
-    return func;
-}
-
-/** Create a backend layer depth concatenate function
- *
- * @param[in] node Node to create the backend function for
- *
- * @return Backend depth concatenate layer function
- */
-std::unique_ptr<arm_compute::IFunction> create_depth_concatenate_layer(DepthConcatenateLayerNode &node)
+/** Collection of CL depthwise convolution functions */
+struct CLDepthwiseConvolutionLayerFunctions
 {
-    ARM_COMPUTE_LOG_GRAPH_VERBOSE("Creating CL DepthConcatenate node with ID : " << node.id() << " and Name: " << node.name() << std::endl);
-    ARM_COMPUTE_ERROR_ON(node.num_outputs() != 1);
-
-    // Return nullptr if depth concatenate is switched off
-    if(!node.is_enabled())
-    {
-        return nullptr;
-    }
+    using GenericDepthwiseConvolutionLayer = CLDepthwiseConvolutionLayer;
+    using DepthwiseConvolutionLayer3x3     = CLDepthwiseConvolutionLayer3x3;
+};
 
-    // Extract IO and info
-    std::vector<arm_compute::ICLTensor *> inputs;
-    for(unsigned int i = 0; i < node.num_inputs(); ++i)
-    {
-        inputs.push_back(get_backing_tensor(node.input(i)));
-    }
-    ICLTensor *output = get_backing_tensor(node.output(0));
-
-    // Create and configure function
-    auto func = support::cpp14::make_unique<CLDepthConcatenateLayer>();
-    func->configure(inputs, output);
-
-    // Log info
-    ARM_COMPUTE_LOG_GRAPH_INFO("Instantiated CLDepthConcatenateLayer"
-                               << " Data Type: " << output->info()->data_type()
-                               << " Shape: " << output->info()->tensor_shape()
-                               << " Num Inputs: " << inputs.size()
-                               << std::endl);
-
-    return std::move(func);
-}
-
-/** Create a backend layer depth-wise convolution function
- *
- * @param[in] node Node to create the backend function for
- *
- * @return Backend depth-wise convolution layer function
- */
-std::unique_ptr<IFunction> create_depthwise_convolution_layer(DepthwiseConvolutionLayerNode &node)
+/** Collection of CL element-wise functions */
+struct CLEltwiseFunctions
 {
-    ARM_COMPUTE_LOG_GRAPH_VERBOSE(
-        "Creating CL DepthwiseConvolutionLayer node with ID : " << node.id() << " and Name: " << node.name()
-        << std::endl);
-    ARM_COMPUTE_ERROR_ON(node.num_inputs() != 3);
-    ARM_COMPUTE_ERROR_ON(node.num_outputs() != 1);
-
-    // Extract IO and info
-    ICLTensor *input   = get_backing_tensor(node.input(0));
-    ICLTensor *weights = get_backing_tensor(node.input(1));
-    ICLTensor *biases  = get_backing_tensor(node.input(2));
-    ICLTensor *output  = get_backing_tensor(node.output(0));
-
-    if(is_data_type_quantized_asymmetric(input->info()->data_type()))
-    {
-        biases->info()->set_data_type(DataType::S32);
-    }
-
-    const PadStrideInfo              conv_info     = node.convolution_info();
-    const DepthwiseConvolutionMethod dwc_algorithm = node.depthwise_convolution_method();
-
-    // Create and configure function (we assume that functions have been validated before creation)
-    std::unique_ptr<IFunction> func;
-    std::string                func_name;
-    if(dwc_algorithm == DepthwiseConvolutionMethod::OPTIMIZED_3x3)
-    {
-        std::tie(func, func_name) = create_named_function<CLDepthwiseConvolutionLayer3x3>(
-                                        std::string("CLDepthwiseConvolutionLayer3x3"), input, weights, biases, output, conv_info);
-    }
-    else
-    {
-        std::tie(func, func_name) = create_named_function<CLDepthwiseConvolutionLayer>(
-                                        std::string("CLDepthwiseConvolutionLayer"), input, weights, biases, output, conv_info);
-    }
-
-    // Log info
-    ARM_COMPUTE_LOG_GRAPH_INFO("Instantiated " << func_name
-                               << " Data Type: " << input->info()->data_type()
-                               << " Input QuantInfo: " << input->info()->quantization_info()
-                               << " Weights QuantInfo: " << weights->info()->quantization_info()
-                               << " Input shape: " << input->info()->tensor_shape()
-                               << " Weights shape: " << weights->info()->tensor_shape()
-                               << " Output shape: " << output->info()->tensor_shape()
-                               << std::endl);
-    return func;
-}
-
-/** Create a backend element-wise operation layer function
- *
- * @param[in] node Node to create the backend function for
- *
- * @return Backend element-wise operation layer function
- */
-std::unique_ptr<IFunction> create_eltwise_layer(EltwiseLayerNode &node)
-{
-    ARM_COMPUTE_LOG_GRAPH_VERBOSE(
-        "Creating CL EltwiseLayer node with ID : " << node.id() << " and Name: " << node.name() << std::endl);
-    ARM_COMPUTE_ERROR_ON(node.num_inputs() != 2);
-    ARM_COMPUTE_ERROR_ON(node.num_outputs() != 1);
-
-    // Extract IO and info
-    ICLTensor             *input1         = get_backing_tensor(node.input(0));
-    ICLTensor             *input2         = get_backing_tensor(node.input(1));
-    ICLTensor             *output         = get_backing_tensor(node.output(0));
-    const EltwiseOperation eltwise_op     = node.eltwise_operation();
-    const ConvertPolicy    convert_policy = node.convert_policy();
-    ARM_COMPUTE_ERROR_ON(input1 == nullptr);
-    ARM_COMPUTE_ERROR_ON(input2 == nullptr);
-    ARM_COMPUTE_ERROR_ON(output == nullptr);
-
-    std::unique_ptr<IFunction> func = nullptr;
-    std::string                func_name;
-    if(eltwise_op == EltwiseOperation::ADD)
-    {
-        std::tie(func, func_name) = create_named_function<CLArithmeticAddition>(std::string("CLArithmeticAddition"),
-                                                                                input1, input2, output,
-                                                                                convert_policy);
-    }
-    else if(eltwise_op == EltwiseOperation::SUB)
-    {
-        std::tie(func, func_name) = create_named_function<CLArithmeticSubtraction>(
-                                        std::string("CLArithmeticSubtraction"), input1, input2, output, convert_policy);
-    }
-    else if(eltwise_op == EltwiseOperation::MUL)
-    {
-        std::tie(func, func_name) = create_named_function<CLPixelWiseMultiplication>(
-                                        std::string("CLPixelWiseMultiplication"), input1, input2, output, 1.f, convert_policy,
-                                        node.rounding_policy());
-    }
-    else
-    {
-        ARM_COMPUTE_ERROR("Unsupported element-wise operation!");
-    }
-
-    // Log info
-    ARM_COMPUTE_LOG_GRAPH_INFO("Instantiated " << func_name
-                               << " Data Type: " << input1->info()->data_type()
-                               << " Shape : " << input1->info()->tensor_shape()
-                               << std::endl);
-
-    return func;
-}
-
-/** Create a backend flatten layer function
- *
- * @param[in] node Node to create the backend function for
- *
- * @return Backend flatten layer function
- */
-std::unique_ptr<IFunction> create_flatten_layer(FlattenLayerNode &node)
-{
-    ARM_COMPUTE_LOG_GRAPH_VERBOSE(
-        "Creating CL FlattenLayer node with ID : " << node.id() << " and Name: " << node.name() << std::endl);
-    ARM_COMPUTE_ERROR_ON(node.num_inputs() != 1);
-    ARM_COMPUTE_ERROR_ON(node.num_outputs() != 1);
-
-    // Extract IO and info
-    ICLTensor *input  = get_backing_tensor(node.input(0));
-    ICLTensor *output = get_backing_tensor(node.output(0));
-
-    // Create and configure function
-    auto func = support::cpp14::make_unique<CLFlattenLayer>();
-    func->configure(input, output);
-    ARM_COMPUTE_ERROR_ON(input == nullptr);
-    ARM_COMPUTE_ERROR_ON(output == nullptr);
-
-    // Log info
-    ARM_COMPUTE_LOG_GRAPH_INFO("Instantiated CLFlattenLayer"
-                               << " Data Type: " << input->info()->data_type()
-                               << " Input shape: " << input->info()->tensor_shape()
-                               << " Output shape: " << output->info()->tensor_shape()
-                               << std::endl);
-
-    return std::move(func);
-}
-
-/** Create a backend fully connected layer function
- *
- * @param[in] node Node to create the backend function for
- *
- * @return Backend fully connected layer function
- */
-std::unique_ptr<IFunction> create_fully_connected_layer(FullyConnectedLayerNode &node, GraphContext &ctx)
-{
-    ARM_COMPUTE_LOG_GRAPH_VERBOSE(
-        "Creating CL FullyConnectedLayer node with ID : " << node.id() << " and Name: " << node.name()
-        << std::endl);
-    ARM_COMPUTE_ERROR_ON(node.num_inputs() != 3);
-    ARM_COMPUTE_ERROR_ON(node.num_outputs() != 1);
-
-    // Extract IO and info
-    ICLTensor *input   = get_backing_tensor(node.input(0));
-    ICLTensor *weights = get_backing_tensor(node.input(1));
-    ICLTensor *biases  = get_backing_tensor(node.input(2));
-    ICLTensor *output  = get_backing_tensor(node.output(0));
-
-    // Create and configure function
-    auto func = support::cpp14::make_unique<CLFullyConnectedLayer>(get_memory_manager(ctx, Target::CL));
-    func->configure(input, weights, biases, output);
-    ARM_COMPUTE_ERROR_ON(input == nullptr);
-    ARM_COMPUTE_ERROR_ON(weights == nullptr);
-    ARM_COMPUTE_ERROR_ON(output == nullptr);
-
-    // Log info
-    ARM_COMPUTE_LOG_GRAPH_INFO("Instantiated CLFullyConnectedLayer"
-                               << " Data Type: " << input->info()->data_type()
-                               << " Input shape: " << input->info()->tensor_shape()
-                               << " Weights shape: " << weights->info()->tensor_shape()
-                               << " Biases Shape: " << biases->info()->tensor_shape()
-                               << " Output shape: " << output->info()->tensor_shape()
-                               << std::endl);
-
-    return std::move(func);
-}
-
-/** Create a backend normalization layer function
- *
- * @param[in] node Node to create the backend function for
- *
- * @return Backend normalization layer function
- */
-std::unique_ptr<IFunction> create_normalization_layer(NormalizationLayerNode &node)
-{
-    ARM_COMPUTE_LOG_GRAPH_VERBOSE(
-        "Creating CL NormalizationLayer node with ID : " << node.id() << " and Name: " << node.name() << std::endl);
-    ARM_COMPUTE_ERROR_ON(node.num_inputs() != 1);
-    ARM_COMPUTE_ERROR_ON(node.num_outputs() != 1);
-
-    // Extract IO and info
-    ICLTensor                   *input     = get_backing_tensor(node.input(0));
-    ICLTensor                   *output    = get_backing_tensor(node.output(0));
-    const NormalizationLayerInfo norm_info = node.normalization_info();
-    ARM_COMPUTE_ERROR_ON(input == nullptr);
-    ARM_COMPUTE_ERROR_ON(output == nullptr);
-
-    // Create and configure function
-    auto func = support::cpp14::make_unique<CLNormalizationLayer>();
-    func->configure(input, output, norm_info);
-
-    // Log info
-    ARM_COMPUTE_LOG_GRAPH_INFO("Instantiated CLNormalizationLayer"
-                               << " Data Type: " << input->info()->data_type()
-                               << " Input shape: " << input->info()->tensor_shape()
-                               << " Output shape: " << output->info()->tensor_shape()
-                               << " Normalization info: " << norm_info.type()
-                               << std::endl);
-
-    return std::move(func);
-}
-
-/** Create a backend pooling layer function
- *
- * @param[in] node Node to create the backend function for
- *
- * @return Backend pooling layer function
- */
-std::unique_ptr<IFunction> create_pooling_layer(PoolingLayerNode &node)
-{
-    ARM_COMPUTE_LOG_GRAPH_VERBOSE(
-        "Creating CL PoolingLayer node with ID : " << node.id() << " and Name: " << node.name() << std::endl);
-    ARM_COMPUTE_ERROR_ON(node.num_inputs() != 1);
-    ARM_COMPUTE_ERROR_ON(node.num_outputs() != 1);
-
-    // Extract IO and info
-    ICLTensor             *input     = get_backing_tensor(node.input(0));
-    ICLTensor             *output    = get_backing_tensor(node.output(0));
-    const PoolingLayerInfo pool_info = node.pooling_info();
-    ARM_COMPUTE_ERROR_ON(input == nullptr);
-    ARM_COMPUTE_ERROR_ON(output == nullptr);
-
-    // Create and configure function
-    auto func = support::cpp14::make_unique<CLPoolingLayer>();
-    func->configure(input, output, pool_info);
-
-    // Log info
-    ARM_COMPUTE_LOG_GRAPH_INFO("Instantiated CLPoolingLayer"
-                               << " Data Type: " << input->info()->data_type()
-                               << " Input shape: " << input->info()->tensor_shape()
-                               << " Output shape: " << output->info()->tensor_shape()
-                               << " Pooling info: " << pool_info.pool_type()
-                               << std::endl);
-
-    return std::move(func);
-}
-
-/** Create a backend reshape layer function
- *
- * @param[in] node Node to create the backend function for
- *
- * @return Backend reshape layer function
- */
-std::unique_ptr<IFunction> create_reshape_layer(ReshapeLayerNode &node)
-{
-    ARM_COMPUTE_LOG_GRAPH_VERBOSE(
-        "Creating CL ReshapeLayer node with ID : " << node.id() << " and Name: " << node.name() << std::endl);
-    ARM_COMPUTE_ERROR_ON(node.num_inputs() != 1);
-    ARM_COMPUTE_ERROR_ON(node.num_outputs() != 1);
-
-    // Extract IO and info
-    ICLTensor *input  = get_backing_tensor(node.input(0));
-    ICLTensor *output = get_backing_tensor(node.output(0));
-    ARM_COMPUTE_ERROR_ON(input == nullptr);
-    ARM_COMPUTE_ERROR_ON(output == nullptr);
-
-    // Create and configure function
-    auto func = support::cpp14::make_unique<CLReshapeLayer>();
-    func->configure(input, output);
-
-    // Log info
-    ARM_COMPUTE_LOG_GRAPH_INFO("Instantiated CLReshapeLayer"
-                               << " Data Type: " << input->info()->data_type()
-                               << " Input shape: " << input->info()->tensor_shape()
-                               << " Output shape: " << output->info()->tensor_shape()
-                               << std::endl);
-
-    return std::move(func);
-}
-
-/** Create a backend resize layer function
- *
- * @param[in] node Node to create the backend function for
- *
- * @return Backend resize layer function
- */
-std::unique_ptr<IFunction> create_resize_layer(ResizeLayerNode &node)
-{
-    ARM_COMPUTE_LOG_GRAPH_VERBOSE(
-        "Creating CL Resize node with ID : " << node.id() << " and Name: " << node.name() << std::endl);
-    ARM_COMPUTE_ERROR_ON(node.num_inputs() != 1);
-    ARM_COMPUTE_ERROR_ON(node.num_outputs() != 1);
-
-    // Extract IO and info
-    ICLTensor *input  = get_backing_tensor(node.input(0));
-    ICLTensor *output = get_backing_tensor(node.output(0));
-    ARM_COMPUTE_ERROR_ON(input == nullptr);
-    ARM_COMPUTE_ERROR_ON(output == nullptr);
-    const InterpolationPolicy policy = node.policy();
-
-    // Create and configure function
-    auto func = support::cpp14::make_unique<CLScale>();
-    func->configure(input, output, policy, BorderMode::CONSTANT);
-
-    // Log info
-    ARM_COMPUTE_LOG_GRAPH_INFO("Instantiated CLScale"
-                               << " Data Type: " << input->info()->data_type()
-                               << " Input shape: " << input->info()->tensor_shape()
-                               << " Output shape: " << output->info()->tensor_shape()
-                               << " Interpolation: " << policy
-                               << std::endl);
-
-    return std::move(func);
-}
-
-/** Create a backend softmax layer function
- *
- * @param[in] node Node to create the backend function for
- *
- * @return Backend softmax layer function
- */
-std::unique_ptr<IFunction> create_softmax_layer(SoftmaxLayerNode &node, GraphContext &ctx)
-{
-    ARM_COMPUTE_LOG_GRAPH_VERBOSE(
-        "Creating CL SoftmaxLayer node with ID : " << node.id() << " and Name: " << node.name() << std::endl);
-    ARM_COMPUTE_ERROR_ON(node.num_inputs() != 1);
-    ARM_COMPUTE_ERROR_ON(node.num_outputs() != 1);
-
-    // Extract IO and info
-    ICLTensor *input  = get_backing_tensor(node.input(0));
-    ICLTensor *output = get_backing_tensor(node.output(0));
-    const float beta   = node.beta();
-    ARM_COMPUTE_ERROR_ON(input == nullptr);
-    ARM_COMPUTE_ERROR_ON(output == nullptr);
-
-    // Create and configure function
-    auto func = support::cpp14::make_unique<CLSoftmaxLayer>(get_memory_manager(ctx, Target::CL));
-    func->configure(input, output, beta);
-
-    // Log info
-    ARM_COMPUTE_LOG_GRAPH_INFO("Instantiated CLSoftmaxLayer"
-                               << " Data Type: " << input->info()->data_type()
-                               << " Input shape: " << input->info()->tensor_shape()
-                               << " Output shape: " << output->info()->tensor_shape()
-                               << std::endl);
-
-    return std::move(func);
-}
-} // namespace
+    using Addition       = CLArithmeticAddition;
+    using Subtraction    = CLArithmeticSubtraction;
+    using Multiplication = CLPixelWiseMultiplication;
+};
 
 std::unique_ptr<IFunction> CLFunctionFactory::create(INode *node, GraphContext &ctx)
 {
@@ -683,35 +80,35 @@ std::unique_ptr<IFunction> CLFunctionFactory::create(INode *node, GraphContext &
     switch(type)
     {
         case NodeType::ActivationLayer:
-            return create_activation_layer(*polymorphic_downcast<ActivationLayerNode *>(node));
+            return detail::create_activation_layer<CLActivationLayer, CLTargetInfo>(*polymorphic_downcast<ActivationLayerNode *>(node));
         case NodeType::BatchNormalizationLayer:
-            return create_batch_normalization_layer(*polymorphic_downcast<BatchNormalizationLayerNode *>(node));
+            return detail::create_batch_normalization_layer<CLBatchNormalizationLayer, CLTargetInfo>(*polymorphic_downcast<BatchNormalizationLayerNode *>(node));
         case NodeType::ChannelShuffleLayer:
-            return create_channel_shuffle_layer(*polymorphic_downcast<ChannelShuffleLayerNode *>(node));
+            return detail::create_channel_shuffle_layer<CLChannelShuffleLayer, CLTargetInfo>(*polymorphic_downcast<ChannelShuffleLayerNode *>(node));
         case NodeType::ConvolutionLayer:
-            return create_convolution_layer(*polymorphic_downcast<ConvolutionLayerNode *>(node), ctx);
+            return detail::create_convolution_layer<CLConvolutionLayerFunctions, CLTargetInfo>(*polymorphic_downcast<ConvolutionLayerNode *>(node), ctx);
         case NodeType::DeconvolutionLayer:
-            return create_deconvolution_layer(*polymorphic_downcast<DeconvolutionLayerNode *>(node), ctx);
+            return detail::create_deconvolution_layer<CLDeconvolutionLayer, CLTargetInfo>(*polymorphic_downcast<DeconvolutionLayerNode *>(node), ctx);
         case NodeType::DepthConcatenateLayer:
-            return create_depth_concatenate_layer(*polymorphic_downcast<DepthConcatenateLayerNode *>(node));
+            return detail::create_depth_concatenate_layer<CLDepthConcatenateLayer, CLTargetInfo>(*polymorphic_downcast<DepthConcatenateLayerNode *>(node));
         case NodeType::DepthwiseConvolutionLayer:
-            return create_depthwise_convolution_layer(*polymorphic_downcast<DepthwiseConvolutionLayerNode *>(node));
+            return detail::create_depthwise_convolution_layer<CLDepthwiseConvolutionLayerFunctions, CLTargetInfo>(*polymorphic_downcast<DepthwiseConvolutionLayerNode *>(node));
         case NodeType::EltwiseLayer:
-            return create_eltwise_layer(*polymorphic_downcast<EltwiseLayerNode *>(node));
+            return detail::create_eltwise_layer<CLEltwiseFunctions, CLTargetInfo>(*polymorphic_downcast<EltwiseLayerNode *>(node));
         case NodeType::FlattenLayer:
-            return create_flatten_layer(*polymorphic_downcast<FlattenLayerNode *>(node));
+            return detail::create_flatten_layer<CLFlattenLayer, CLTargetInfo>(*polymorphic_downcast<FlattenLayerNode *>(node));
         case NodeType::FullyConnectedLayer:
-            return create_fully_connected_layer(*polymorphic_downcast<FullyConnectedLayerNode *>(node), ctx);
+            return detail::create_fully_connected_layer<CLFullyConnectedLayer, CLTargetInfo>(*polymorphic_downcast<FullyConnectedLayerNode *>(node), ctx);
         case NodeType::NormalizationLayer:
-            return create_normalization_layer(*polymorphic_downcast<NormalizationLayerNode *>(node));
+            return detail::create_normalization_layer<CLNormalizationLayer, CLTargetInfo>(*polymorphic_downcast<NormalizationLayerNode *>(node), ctx);
         case NodeType::PoolingLayer:
-            return create_pooling_layer(*polymorphic_downcast<PoolingLayerNode *>(node));
+            return detail::create_pooling_layer<CLPoolingLayer, CLTargetInfo>(*polymorphic_downcast<PoolingLayerNode *>(node));
         case NodeType::ReshapeLayer:
-            return create_reshape_layer(*polymorphic_downcast<ReshapeLayerNode *>(node));
+            return detail::create_reshape_layer<CLReshapeLayer, CLTargetInfo>(*polymorphic_downcast<ReshapeLayerNode *>(node));
         case NodeType::ResizeLayer:
-            return create_resize_layer(*polymorphic_downcast<ResizeLayerNode *>(node));
+            return detail::create_resize_layer<CLScale, CLTargetInfo>(*polymorphic_downcast<ResizeLayerNode *>(node));
         case NodeType::SoftmaxLayer:
-            return create_softmax_layer(*polymorphic_downcast<SoftmaxLayerNode *>(node), ctx);
+            return detail::create_softmax_layer<CLSoftmaxLayer, CLTargetInfo>(*polymorphic_downcast<SoftmaxLayerNode *>(node), ctx);
         default:
             return nullptr;
     }