COMPMID-2051 Refactor shape_calculator::calculate_concatenate_shape

Change-Id: Ibf316718d11fa975d75f226925747b21c4efd127
Signed-off-by: Michalis Spyrou <michalis.spyrou@arm.com>
Reviewed-on: https://review.mlplatform.org/c/974
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
diff --git a/src/core/CL/kernels/CLDepthConcatenateLayerKernel.cpp b/src/core/CL/kernels/CLDepthConcatenateLayerKernel.cpp
index 3fccc04..1cae371 100644
--- a/src/core/CL/kernels/CLDepthConcatenateLayerKernel.cpp
+++ b/src/core/CL/kernels/CLDepthConcatenateLayerKernel.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2018 ARM Limited.
+ * Copyright (c) 2017-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -47,19 +47,13 @@
 {
     ARM_COMPUTE_UNUSED(depth_offset);
 
-    // Configure kernel window
-    const int left_right = (output->dimension(0) - input->dimension(0)) / 2;
-    const int top_bottom = (output->dimension(1) - input->dimension(1)) / 2;
-
     const unsigned int num_elems_processed_per_iteration = 16 / input->element_size();
-    const unsigned int num_elems_read_per_iteration      = 16 / input->element_size();
-    const unsigned int num_rows_read_per_iteration       = 1;
 
     // The window needs to be based on input as we copy all the depths of input
     Window win = calculate_max_window(*output, Steps(num_elems_processed_per_iteration));
     win.set(Window::DimZ, Window::Dimension(0, input->tensor_shape().z(), 1));
 
-    AccessWindowRectangle  input_access(input, -left_right, -top_bottom, num_elems_read_per_iteration, num_rows_read_per_iteration);
+    AccessWindowHorizontal input_access(input, 0, num_elems_processed_per_iteration);
     AccessWindowHorizontal output_access(output, 0, num_elems_processed_per_iteration);
     bool                   window_changed = update_window_and_padding(win, input_access, output_access);
     output_access.set_valid_region(win, ValidRegion(Coordinates(), output->tensor_shape()));
@@ -74,30 +68,20 @@
     ARM_COMPUTE_RETURN_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(input, 1, DataType::QASYMM8, DataType::F16, DataType::F32);
     ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_TYPES(input, output);
 
+    ARM_COMPUTE_RETURN_ERROR_ON(input->dimension(Window::DimX) != output->dimension(Window::DimX));
+    ARM_COMPUTE_RETURN_ERROR_ON(input->dimension(Window::DimY) != output->dimension(Window::DimY));
     ARM_COMPUTE_RETURN_ERROR_ON(input->dimension(2) + depth_offset > output->dimension(2));
-    ARM_COMPUTE_RETURN_ERROR_ON(input->dimension(0) > output->dimension(0));
-    ARM_COMPUTE_RETURN_ERROR_ON(input->dimension(1) > output->dimension(1));
     ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_SHAPES(3, input, output);
 
-    // The gaps between the two lowest dimensions of input and output need to be divisible by 2
-    // Otherwise it is not clear how the padding should be added onto the input tensor
-    ARM_COMPUTE_RETURN_ERROR_ON((output->dimension(0) - input->dimension(0)) % 2);
-    ARM_COMPUTE_RETURN_ERROR_ON((output->dimension(1) - input->dimension(1)) % 2);
-
     return Status{};
 }
 } // namespace
 
 CLDepthConcatenateLayerKernel::CLDepthConcatenateLayerKernel()
-    : _input(nullptr), _output(nullptr), _top_bottom(0), _left_right(0), _depth_offset(0)
+    : _input(nullptr), _output(nullptr), _depth_offset(0)
 {
 }
 
-BorderSize CLDepthConcatenateLayerKernel::border_size() const
-{
-    return BorderSize(_top_bottom, _left_right);
-}
-
 void CLDepthConcatenateLayerKernel::configure(const ICLTensor *input, unsigned int depth_offset, ICLTensor *output)
 {
     ARM_COMPUTE_ERROR_ON_NULLPTR(input, output);
@@ -125,10 +109,6 @@
     _kernel = static_cast<cl::Kernel>(CLKernelLibrary::get().create_kernel("concatenate_depth", build_opts.options()));
 
     // Configure kernel window
-    _left_right = (output->info()->dimension(0) - input->info()->dimension(0)) / 2;
-    _top_bottom = (output->info()->dimension(1) - input->info()->dimension(1)) / 2;
-
-    // Configure kernel window
     auto win_config = validate_and_configure_window(input->info(), depth_offset, output->info());
     ARM_COMPUTE_ERROR_THROW_ON(std::get<0>(win_config));
 
@@ -153,16 +133,8 @@
 
     const int offset_to_first_elements_in_bytes = _depth_offset * _output->info()->strides_in_bytes()[2];
 
-    unsigned int  idx = 2 * num_arguments_per_3D_tensor(); // Skip the input and output parameters
-    const cl_int3 offsets =
-    {
-        {
-            static_cast<cl_int>(_left_right),
-            static_cast<cl_int>(_top_bottom),
-            static_cast<cl_int>(offset_to_first_elements_in_bytes),
-        }
-    };
-    _kernel.setArg<cl_int3>(idx, offsets);
+    unsigned int idx = 2 * num_arguments_per_3D_tensor(); // Skip the input and output parameters
+    _kernel.setArg<cl_int>(idx, offset_to_first_elements_in_bytes);
 
     do
     {