COMPMID-808 Add NHWC data format support for NEON direct convolution

Change-Id: I5d4cc3d5b0d25f3fe4ed998c0f15b1b8e260a43a
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/125697
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>

1 files changed, 291 insertions, 144 deletions

diff --git a/src/core/NEON/kernels/NEDirectConvolutionLayerKernel.cpp b/src/core/NEON/kernels/NEDirectConvolutionLayerKernel.cpp
index 285ec2d0a0..5eafdf0363 100644
--- a/src/core/NEON/kernels/NEDirectConvolutionLayerKernel.cpp
+++ b/src/core/NEON/kernels/NEDirectConvolutionLayerKernel.cpp
@@ -33,6 +33,7 @@
 #include "arm_compute/core/Types.h"
 #include "arm_compute/core/Utils.h"
 #include "arm_compute/core/Validate.h"
+#include "arm_compute/core/utils/misc/ShapeCalculator.h"
 
 #include <algorithm>
 #include <arm_neon.h>
@@ -663,6 +664,118 @@ void accumulate_results<3>(qint16_t *buffer, const qint16x8x2_t &values)
     vst1_qs16(buffer, vqadd_qs16(vld1_qs16(buffer), vget_low_s16(values.val[0])));
 }
 
+template <typename T1>
+class convolver_nhwc
+{
+public:
+    static void convolve(const Window &window, int kernel_size, unsigned int num_elems_read_per_iteration,
+                         const ITensor *input, const ITensor *weights, ITensor *output, const PadStrideInfo &conv_info)
+    {
+        const int          input_width     = input->info()->dimension(0);
+        const int          input_depth     = input->info()->dimension(2);
+        const int          input_stride_x  = input->info()->strides_in_bytes().x();
+        const int          input_stride_y  = input->info()->strides_in_bytes().y();
+        const int          input_stride_z  = input->info()->strides_in_bytes().z();
+        const int          output_stride_x = output->info()->strides_in_bytes().x();
+        const int          kernel_stride_x = weights->info()->strides_in_bytes().x();
+        const int          kernel_stride_y = weights->info()->strides_in_bytes().y();
+        const int          kernel_stride_z = weights->info()->strides_in_bytes().z();
+        const int          conv_pad_top    = conv_info.pad_top();
+        const unsigned int conv_stride_x   = std::get<0>(conv_info.stride());
+        const unsigned int conv_stride_y   = std::get<1>(conv_info.stride());
+        const T1           zero            = 0;
+
+        // Setup input window for the input iterator
+        Window window_in = window;
+        window_in.set(Window::DimX, Window::Dimension(0, 0, 0));
+        window_in.set(Window::DimY, Window::Dimension(0, 0, 0));
+        window_in.set(Window::DimZ, Window::Dimension(0, 0, 0));
+
+        // Setup input window for the output iterator
+        Window window_out = window;
+        window_out.set(Window::DimX, Window::Dimension(0, 1, 1));
+
+        // Setup input window for the weights iterator
+        Window window_k = calculate_max_window(*weights->info(), Steps());
+        window_k.set(Window::DimX, Window::Dimension(0, 1, 1));
+        window_k.set(Window::DimY, Window::Dimension(0, 1, 1));
+        window_k.set(Window::DimZ, Window::Dimension(0, 1, 1));
+        window_k.set(3, Window::Dimension(0, weights->info()->dimension(3), 1));
+
+        Iterator in(input, window_in);
+        Iterator out(output, window_out);
+        Iterator k(weights, window_k);
+
+        execute_window_loop(window_k, [&](const Coordinates & id_k)
+        {
+            execute_window_loop(window_out, [&](const Coordinates & id)
+            {
+                const auto in_y = static_cast<int>(id.y() * conv_stride_x - conv_info.pad_left());
+                const auto in_z = static_cast<int>(id.z() * conv_stride_y - conv_pad_top);
+
+                const uint8_t *in_ptr  = in.ptr() + in_y * input_stride_y + in_z * input_stride_z;
+                uint8_t       *out_ptr = out.ptr() + id_k[3] * output_stride_x;
+
+                T1 out_val = 0;
+
+                auto in_addr_base0 = in_ptr;
+                auto we_addr_base0 = k.ptr();
+
+                for(int z = 0; z < kernel_size; ++z, in_addr_base0 += input_stride_z, we_addr_base0 += kernel_stride_z)
+                {
+                    const int in_z = id.z() * conv_stride_y + z - conv_pad_top;
+
+                    if(in_z >= 0 && in_z < input_depth) // If false, pad top/bottom
+                    {
+                        auto in_addr_base1 = in_addr_base0;
+                        auto we_addr_base1 = we_addr_base0;
+
+                        for(int y = 0; y < kernel_size; ++y, in_addr_base1 += input_stride_y, we_addr_base1 += kernel_stride_y)
+                        {
+                            auto out_values = internal_vdupq_n(zero);
+
+                            int x           = 0;
+                            int no_leftover = input_width - num_elems_read_per_iteration;
+
+                            for(; x < no_leftover; x += num_elems_read_per_iteration)
+                            {
+                                const auto in_addr   = reinterpret_cast<const T1 *>(in_addr_base1 + x * input_stride_x);
+                                const auto in_values = internal_vld1q<1>(in_addr);
+
+                                const auto we_addr   = reinterpret_cast<const T1 *>(we_addr_base1 + x * kernel_stride_x);
+                                const auto we_values = internal_vld1q<1>(we_addr);
+
+                                out_values = internal_vmlal(out_values, in_values, we_values, 0);
+                            }
+
+                            out_val += out_values[0];
+                            out_val += out_values[1];
+                            out_val += out_values[2];
+                            out_val += out_values[3];
+
+                            // Leftover
+                            for(; x < input_width; ++x)
+                            {
+                                const auto in_addr  = reinterpret_cast<const T1 *>(in_addr_base1 + x * input_stride_x);
+                                const auto in_value = *(in_addr);
+
+                                const auto we_addr  = reinterpret_cast<const T1 *>(we_addr_base1 + x * kernel_stride_x);
+                                const auto we_value = *(we_addr);
+
+                                out_val += in_value * we_value;
+                            }
+                        }
+                    }
+                }
+
+                *(reinterpret_cast<T1 *>(out_ptr)) = out_val;
+            },
+            in, out);
+        },
+        k);
+    }
+};
+
 template <typename T1, typename T2, unsigned int stridex>
 class convolver_3x3
 {
@@ -1003,35 +1116,28 @@ inline void convolve_5x5(const Window &window, unsigned int num_elems_read_per_i
     }
 }
 
-inline TensorShape get_convolved_dimensions(const ITensorInfo *input, const ITensorInfo *weights, const int kernel_size, const PadStrideInfo &conv_info)
-{
-    unsigned int output_width  = 0;
-    unsigned int output_height = 0;
-    std::tie(output_width, output_height) = scaled_dimensions(input->dimension(0), input->dimension(1), kernel_size, kernel_size, conv_info);
-
-    TensorShape output_shape = input->tensor_shape();
-    output_shape.set(0, output_width);
-    output_shape.set(1, output_height);
-    output_shape.set(2, weights->dimension(3));
-
-    return output_shape;
-}
-
 Status validate_arguments(const ITensorInfo *input, const ITensorInfo *weights, const ITensorInfo *output, const PadStrideInfo &conv_info)
 {
     ARM_COMPUTE_RETURN_ERROR_ON_NULLPTR(input, weights, output);
+    ARM_COMPUTE_RETURN_ERROR_ON(input->data_layout() == DataLayout::UNKNOWN);
     ARM_COMPUTE_RETURN_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(input, 1, DataType::QS8, DataType::QS16, DataType::F16, DataType::F32);
     ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_TYPES(input, weights);
 
+    const DataLayout data_layout = input->data_layout();
+    const int        width_idx   = get_data_layout_dimension_index(data_layout, DataLayoutDimension::WIDTH);
+    const int        height_idx  = get_data_layout_dimension_index(data_layout, DataLayoutDimension::HEIGHT);
+    const int        channel_idx = get_data_layout_dimension_index(data_layout, DataLayoutDimension::CHANNEL);
+
     ARM_COMPUTE_RETURN_ERROR_ON_MSG(std::get<0>(conv_info.stride()) > 3, "Strides larger than 3 not supported.");
-    ARM_COMPUTE_RETURN_ERROR_ON(weights->dimension(2) != input->dimension(2));
-    ARM_COMPUTE_RETURN_ERROR_ON(weights->dimension(0) != weights->dimension(1));
+    ARM_COMPUTE_RETURN_ERROR_ON(weights->dimension(channel_idx) != input->dimension(channel_idx));
+    ARM_COMPUTE_RETURN_ERROR_ON(weights->dimension(width_idx) != weights->dimension(height_idx));
     ARM_COMPUTE_RETURN_ERROR_ON(weights->num_dimensions() > 4);
+    ARM_COMPUTE_RETURN_ERROR_ON(data_layout == DataLayout::NHWC && input->data_type() != DataType::F32);
 
     // Checks performed when output is configured
     if(output->total_size() != 0)
     {
-        TensorShape output_shape = get_convolved_dimensions(input, weights, weights->dimension(0), conv_info);
+        TensorShape output_shape = misc::shape_calculator::compute_deep_convolution_shape(*input, *weights, conv_info);
 
         DataType data_type = input->data_type();
         if(is_data_type_fixed_point(data_type))
@@ -1050,101 +1156,127 @@ Status validate_arguments(const ITensorInfo *input, const ITensorInfo *weights,
 std::pair<Status, Window> validate_and_configure_window(ITensorInfo *input, ITensorInfo *weights, ITensorInfo *output, const PadStrideInfo &conv_info, unsigned int &num_weight_elems_read_per_row,
                                                         unsigned int &num_elems_read_per_iteration, unsigned int &num_elems_written_per_iteration, BorderSize &border_size)
 {
+    ARM_COMPUTE_ERROR_ON(input->data_layout() == DataLayout::UNKNOWN);
+
+    const DataLayout data_layout = input->data_layout();
+    const int        width_idx   = get_data_layout_dimension_index(data_layout, DataLayoutDimension::WIDTH);
+
     // Calculate right and bottom border
-    unsigned int kernel_size   = weights->dimension(0);
+    unsigned int kernel_size   = weights->dimension(width_idx);
     const int    conv_stride_x = std::get<0>(conv_info.stride());
     const int    conv_stride_y = std::get<1>(conv_info.stride());
-    const int    input_width   = input->dimension(0);
+    const int    input_width   = input->dimension(width_idx);
+
+    Window win{};
+    bool   window_changed = false;
 
-    switch(kernel_size)
+    if(data_layout == DataLayout::NCHW)
     {
-        case 1:
+        switch(kernel_size)
         {
-            switch(input->data_type())
+            case 1:
             {
+                switch(input->data_type())
+                {
 #ifdef __ARM_FEATURE_FP16_VECTOR_ARITHMETIC
-                case DataType::F16:
+                    case DataType::F16:
 #endif /* __ARM_FEATURE_FP16_VECTOR_ARITHMETIC */
-                case DataType::QS8:
-                case DataType::QS16:
-                    num_elems_written_per_iteration = 8;
-                    break;
-                case DataType::F32:
-                    if(run_optim_small_tensor_info(input))
-                    {
+                    case DataType::QS8:
+                    case DataType::QS16:
                         num_elems_written_per_iteration = 8;
-                    }
-                    else
-                    {
-                        num_elems_written_per_iteration = 4;
-                    }
-                    break;
-                default:
-                    ARM_COMPUTE_ERROR("Data type not supported.");
-                    break;
+                        break;
+                    case DataType::F32:
+                        if(run_optim_small_tensor_info(input))
+                        {
+                            num_elems_written_per_iteration = 8;
+                        }
+                        else
+                        {
+                            num_elems_written_per_iteration = 4;
+                        }
+                        break;
+                    default:
+                        ARM_COMPUTE_ERROR("Data type not supported.");
+                        break;
+                }
+                num_weight_elems_read_per_row = kernel_size;
+                num_elems_read_per_iteration  = conv_stride_x * num_elems_written_per_iteration;
+                break;
             }
-            num_weight_elems_read_per_row = kernel_size;
-            num_elems_read_per_iteration  = conv_stride_x * num_elems_written_per_iteration;
-            break;
-        }
-        case 3:
-        case 5:
-        {
-            switch(input->data_type())
+            case 3:
+            case 5:
             {
-                case DataType::F32:
-                    num_weight_elems_read_per_row   = 4 + kernel_size - 1;
-                    num_elems_read_per_iteration    = 12;
-                    num_elems_written_per_iteration = 16 >> conv_stride_x;
-                    break;
+                switch(input->data_type())
+                {
+                    case DataType::F32:
+                        num_weight_elems_read_per_row   = 4 + kernel_size - 1;
+                        num_elems_read_per_iteration    = 12;
+                        num_elems_written_per_iteration = 16 >> conv_stride_x;
+                        break;
 #ifdef __ARM_FEATURE_FP16_VECTOR_ARITHMETIC
-                case DataType::F16:
+                    case DataType::F16:
 #endif /* __ARM_FEATURE_FP16_VECTOR_ARITHMETIC */
-                case DataType::QS8:
-                case DataType::QS16:
-                    num_weight_elems_read_per_row   = 8 + kernel_size - 1;
-                    num_elems_read_per_iteration    = 24;
-                    num_elems_written_per_iteration = 32 >> conv_stride_x;
-                    break;
-                default:
-                    ARM_COMPUTE_ERROR("Data type not supported.");
-                    break;
+                    case DataType::QS8:
+                    case DataType::QS16:
+                        num_weight_elems_read_per_row   = 8 + kernel_size - 1;
+                        num_elems_read_per_iteration    = 24;
+                        num_elems_written_per_iteration = 32 >> conv_stride_x;
+                        break;
+                    default:
+                        ARM_COMPUTE_ERROR("Data type not supported.");
+                        break;
+                }
             }
-        }
-        break;
-        default:
-        {
-            ARM_COMPUTE_ERROR("Not implemented");
             break;
+            default:
+            {
+                ARM_COMPUTE_ERROR("Not implemented");
+                break;
+            }
         }
-    }
 
-    // Calculate right pad
-    int start_x       = kernel_size / 2 - static_cast<int>(conv_info.pad_left());
-    int end_x         = ceil_to_multiple(static_cast<int>(output->dimension(0)), num_elems_written_per_iteration) * conv_stride_x;
-    int upper_bound_w = ceil_to_multiple(start_x + end_x, num_elems_read_per_iteration) - input_width;
+        // Calculate right pad
+        int start_x       = kernel_size / 2 - static_cast<int>(conv_info.pad_left());
+        int end_x         = ceil_to_multiple(static_cast<int>(output->dimension(0)), num_elems_written_per_iteration) * conv_stride_x;
+        int upper_bound_w = ceil_to_multiple(start_x + end_x, num_elems_read_per_iteration) - input_width;
 
-    // Calculate border
-    const unsigned int conv_pad_left   = conv_info.pad_left();
-    const unsigned int conv_pad_top    = conv_info.pad_top();
-    const unsigned int conv_pad_right  = std::max(upper_bound_w, 0);
-    const unsigned int conv_pad_bottom = conv_info.pad_bottom();
+        // Calculate border
+        const unsigned int conv_pad_left   = conv_info.pad_left();
+        const unsigned int conv_pad_top    = conv_info.pad_top();
+        const unsigned int conv_pad_right  = std::max(upper_bound_w, 0);
+        const unsigned int conv_pad_bottom = conv_info.pad_bottom();
+
+        border_size.left   = conv_pad_left;
+        border_size.top    = conv_pad_top;
+        border_size.right  = conv_pad_right;
+        border_size.bottom = conv_pad_bottom;
+
+        // Configure window
+        win = calculate_max_window(*output, Steps(num_elems_written_per_iteration));
+
+        AccessWindowRectangle input_access(input, -conv_pad_left, -conv_pad_top,
+                                           num_elems_read_per_iteration, kernel_size,
+                                           conv_stride_x, conv_stride_y);
+        AccessWindowStatic     weights_access(weights, 0, 0, num_weight_elems_read_per_row, kernel_size);
+        AccessWindowHorizontal output_access(output, 0, num_elems_written_per_iteration);
+        window_changed = update_window_and_padding(win, input_access, weights_access, output_access);
+        output_access.set_valid_region(win, ValidRegion(Coordinates(), output->tensor_shape()));
+    }
+    else
+    {
+        border_size.left   = 0;
+        border_size.top    = conv_info.pad_left();
+        border_size.right  = 0;
+        border_size.bottom = conv_info.pad_right();
 
-    border_size.left   = conv_pad_left;
-    border_size.top    = conv_pad_top;
-    border_size.right  = conv_pad_right;
-    border_size.bottom = conv_pad_bottom;
+        num_elems_read_per_iteration = 16 / element_size_from_data_type(input->data_type());
 
-    // Configure window
-    Window win = calculate_max_window(*output, Steps(num_elems_written_per_iteration));
+        win = calculate_max_window(*output, Steps());
 
-    AccessWindowRectangle input_access(input, -conv_pad_left, -conv_pad_top,
-                                       num_elems_read_per_iteration, kernel_size,
-                                       conv_stride_x, conv_stride_y);
-    AccessWindowStatic     weights_access(weights, 0, 0, num_weight_elems_read_per_row, kernel_size);
-    AccessWindowHorizontal output_access(output, 0, num_elems_written_per_iteration);
-    bool                   window_changed = update_window_and_padding(win, input_access, weights_access, output_access);
-    output_access.set_valid_region(win, ValidRegion(Coordinates(), output->tensor_shape()));
+        AccessWindowRectangle input_access(input, 0, -border_size.top, num_elems_read_per_iteration, kernel_size, 1.f, conv_stride_x);
+        AccessWindowRectangle weights_access(weights, 0, 0, num_elems_read_per_iteration, kernel_size);
+        window_changed = update_window_and_padding(win, input_access, weights_access);
+    }
 
     Status err = (window_changed) ? ARM_COMPUTE_CREATE_ERROR(ErrorCode::RUNTIME_ERROR, "Insufficient Padding!") : Status{};
     return std::make_pair(err, win);
@@ -1170,7 +1302,7 @@ void NEDirectConvolutionLayerKernel::configure(const ITensor *input, const ITens
     _weights     = weights;
     _output      = output;
     _conv_info   = conv_info;
-    _kernel_size = weights->info()->dimension(0);
+    _kernel_size = weights->info()->dimension(get_data_layout_dimension_index(weights->info()->data_layout(), DataLayoutDimension::WIDTH));
 
     const unsigned int conv_pad_left   = conv_info.pad_left();
     const unsigned int conv_pad_top    = conv_info.pad_top();
@@ -1179,7 +1311,7 @@ void NEDirectConvolutionLayerKernel::configure(const ITensor *input, const ITens
     _border_size                       = BorderSize(conv_pad_top, conv_pad_right, conv_pad_bottom, conv_pad_left);
 
     // Get convolved dimensions
-    TensorShape output_shape = get_convolved_dimensions(input->info(), weights->info(), _kernel_size, conv_info);
+    TensorShape output_shape = misc::shape_calculator::compute_deep_convolution_shape(*input->info(), *weights->info(), conv_info);
 
     DataType data_type = input->info()->data_type();
 
@@ -1229,73 +1361,88 @@ void NEDirectConvolutionLayerKernel::run(const Window &window, const ThreadInfo
     ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(INEKernel::window(), window);
     ARM_COMPUTE_ERROR_ON(_input->buffer() == nullptr);
 
-    const int kernel_size = _weights->info()->dimension(0);
+    const int kernel_size = _weights->info()->dimension(get_data_layout_dimension_index(_weights->info()->data_layout(), DataLayoutDimension::WIDTH));
 
-    switch(kernel_size)
+    if(_input->info()->data_layout() == DataLayout::NCHW)
     {
-        case 1:
+        switch(kernel_size)
         {
-            switch(_input->info()->data_type())
+            case 1:
             {
-                case DataType::QS8:
-                    convolve_1x1<qint8_t, qint16_t>(window, _num_elems_read_per_iteration, _num_elems_written_per_iteration, _input, _weights, _output, _conv_info);
-                    break;
-                case DataType::QS16:
-                    convolve_1x1<qint16_t, qint32_t>(window, _num_elems_read_per_iteration, _num_elems_written_per_iteration, _input, _weights, _output, _conv_info);
-                    break;
-                case DataType::F32:
-                    convolve_1x1<float, float>(window, _num_elems_read_per_iteration, _num_elems_written_per_iteration, _input, _weights, _output, _conv_info);
-                    break;
+                switch(_input->info()->data_type())
+                {
+                    case DataType::QS8:
+                        convolve_1x1<qint8_t, qint16_t>(window, _num_elems_read_per_iteration, _num_elems_written_per_iteration, _input, _weights, _output, _conv_info);
+                        break;
+                    case DataType::QS16:
+                        convolve_1x1<qint16_t, qint32_t>(window, _num_elems_read_per_iteration, _num_elems_written_per_iteration, _input, _weights, _output, _conv_info);
+                        break;
+                    case DataType::F32:
+                        convolve_1x1<float, float>(window, _num_elems_read_per_iteration, _num_elems_written_per_iteration, _input, _weights, _output, _conv_info);
+                        break;
 #ifdef __ARM_FEATURE_FP16_VECTOR_ARITHMETIC
-                case DataType::F16:
-                    convolve_1x1<float16_t, float16_t>(window, _num_elems_read_per_iteration, _num_elems_written_per_iteration, _input, _weights, _output, _conv_info);
-                    break;
+                    case DataType::F16:
+                        convolve_1x1<float16_t, float16_t>(window, _num_elems_read_per_iteration, _num_elems_written_per_iteration, _input, _weights, _output, _conv_info);
+                        break;
 #endif /* __ARM_FEATURE_FP16_VECTOR_ARITHMETIC */
-                default:
-                    ARM_COMPUTE_ERROR("Data type not supported");
-                    break;
+                    default:
+                        ARM_COMPUTE_ERROR("Data type not supported");
+                        break;
+                }
+                break;
             }
-            break;
-        }
-        case 3:
-        {
-            switch(_input->info()->data_type())
+            case 3:
             {
-                case DataType::QS8:
-                    convolve_3x3<qint8_t, qint16_t>(window, _num_elems_read_per_iteration, _num_elems_written_per_iteration, _input, _weights, _output, _conv_info);
-                    break;
-                case DataType::F32:
-                    convolve_3x3<float, float>(window, _num_elems_read_per_iteration, _num_elems_written_per_iteration, _input, _weights, _output, _conv_info);
-                    break;
+                switch(_input->info()->data_type())
+                {
+                    case DataType::QS8:
+                        convolve_3x3<qint8_t, qint16_t>(window, _num_elems_read_per_iteration, _num_elems_written_per_iteration, _input, _weights, _output, _conv_info);
+                        break;
+                    case DataType::F32:
+                        convolve_3x3<float, float>(window, _num_elems_read_per_iteration, _num_elems_written_per_iteration, _input, _weights, _output, _conv_info);
+                        break;
 #ifdef __ARM_FEATURE_FP16_VECTOR_ARITHMETIC
-                case DataType::F16:
-                    convolve_3x3<float16_t, float16_t>(window, _num_elems_read_per_iteration, _num_elems_written_per_iteration, _input, _weights, _output, _conv_info);
-                    break;
+                    case DataType::F16:
+                        convolve_3x3<float16_t, float16_t>(window, _num_elems_read_per_iteration, _num_elems_written_per_iteration, _input, _weights, _output, _conv_info);
+                        break;
 #endif /* __ARM_FEATURE_FP16_VECTOR_ARITHMETIC */
-                default:
-                    ARM_COMPUTE_ERROR("Data type not supported");
-                    break;
+                    default:
+                        ARM_COMPUTE_ERROR("Data type not supported");
+                        break;
+                }
+                break;
             }
-            break;
-        }
-        case 5:
-        {
-            switch(_input->info()->data_type())
+            case 5:
+            {
+                switch(_input->info()->data_type())
+                {
+                    case DataType::F32:
+                        convolve_5x5<float, float>(window, _num_elems_read_per_iteration, _num_elems_written_per_iteration, _input, _weights, _output, _conv_info);
+                        break;
+                    default:
+                        ARM_COMPUTE_ERROR("Data type not supported");
+                        break;
+                }
+                break;
+            }
+
+            default:
             {
-                case DataType::F32:
-                    convolve_5x5<float, float>(window, _num_elems_read_per_iteration, _num_elems_written_per_iteration, _input, _weights, _output, _conv_info);
-                    break;
-                default:
-                    ARM_COMPUTE_ERROR("Data type not supported");
-                    break;
+                ARM_COMPUTE_ERROR("Only kernel sizes 1x1, 3x3 and 5x5 are supported.");
+                break;
             }
-            break;
         }
-
-        default:
+    }
+    else
+    {
+        switch(_input->info()->data_type())
         {
-            ARM_COMPUTE_ERROR("Only kernel sizes 1x1, 3x3 and 5x5 are supported.");
-            break;
+            case DataType::F32:
+                convolver_nhwc<float>::convolve(window, kernel_size, _num_elems_read_per_iteration, _input, _weights, _output, _conv_info);
+                break;
+            default:
+                ARM_COMPUTE_ERROR("Data type not supported");
+                break;
         }
     }
 }