1 files changed, 111 insertions, 15 deletions

diff --git a/src/core/CL/kernels/CLCopyKernel.cpp b/src/core/CL/kernels/CLCopyKernel.cpp
index 2da67d2666..e14e5dafab 100644
--- a/src/core/CL/kernels/CLCopyKernel.cpp
+++ b/src/core/CL/kernels/CLCopyKernel.cpp
@@ -30,21 +30,22 @@
 #include "arm_compute/core/Error.h"
 #include "arm_compute/core/Helpers.h"
 #include "arm_compute/core/TensorInfo.h"
-#include "arm_compute/core/Validate.h"
 #include "arm_compute/core/Window.h"
+#include "arm_compute/core/utils/misc/ShapeCalculator.h"
 
-using namespace arm_compute;
-
+namespace arm_compute
+{
 namespace
 {
-Status validate_arguments(const ITensorInfo *input, const ITensorInfo *output)
+Status validate_arguments(const ITensorInfo *input, const ITensorInfo *output, const PaddingList &padding = PaddingList())
 {
     ARM_COMPUTE_RETURN_ERROR_ON_NULLPTR(input, output);
+    ARM_COMPUTE_RETURN_ERROR_ON(padding.size() > 4);
 
     // Validate output if initialized
     if(output->total_size() != 0)
     {
-        ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DIMENSIONS(input->tensor_shape(), output->tensor_shape());
+        ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DIMENSIONS(misc::shape_calculator::compute_padded_shape(input->tensor_shape(), padding), output->tensor_shape());
         ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_TYPES(input, output);
     }
 
@@ -69,6 +70,64 @@ std::pair<Status, Window> validate_and_configure_window(ITensorInfo *input, ITen
     Status err = (window_changed) ? ARM_COMPUTE_CREATE_ERROR(ErrorCode::RUNTIME_ERROR, "Insufficient Padding!") : Status{};
     return std::make_pair(err, win);
 }
+
+std::pair<Status, Window> validate_and_configure_window_with_padding(ITensorInfo *input, ITensorInfo *output, const PaddingList &padding)
+{
+    TensorShape input_shape  = input->tensor_shape();
+    TensorShape padded_shape = misc::shape_calculator::compute_padded_shape(input_shape, padding);
+
+    auto_init_if_empty(*output, input->clone()->set_tensor_shape(padded_shape));
+
+    // Configure window
+    const unsigned int num_elems_processed_per_iteration = 16 / input->element_size();
+
+    Window win = calculate_max_window(*input, Steps(num_elems_processed_per_iteration));
+
+    // Pad on the x dimension accounting for the padding offset along the same dimension
+    AccessWindowHorizontal output_access(output, padding[0].first, num_elems_processed_per_iteration);
+    AccessWindowHorizontal input_access(input, 0, num_elems_processed_per_iteration);
+    bool                   window_changed = update_window_and_padding(win, input_access, output_access);
+
+    Status err = (window_changed) ? ARM_COMPUTE_CREATE_ERROR(ErrorCode::RUNTIME_ERROR, "Insufficient Padding!") : Status{};
+    return std::make_pair(err, win);
+}
+
+/** Generate the string "-DPAD= @p dim @p index @p padding"
+ *
+ * @param[in] dim     The dimension index
+ * @param[in] index   Can be 0 for the start dimension and 1 for the end dimension
+ * @param[in] padding The value to pad for that index/dimension pair
+ *
+ * @return The correct concatenated string
+ */
+std::string generate_pad_string(const size_t dim, const size_t index, const size_t padding)
+{
+    return "-DPAD" + support::cpp11::to_string(dim) + support::cpp11::to_string(index) + "=" + support::cpp11::to_string(padding);
+}
+
+/** Pass the padding as build option to the kernel.
+ *
+ * @param[in]  tensor     The padded tensor
+ * @param[in]  padding    The list of the padding for each dimension
+ * @param[out] build_opts The build option to which adding the padding
+ */
+void add_padding_as_build_options(const PaddingList &padding, CLBuildOptions &build_opts)
+{
+    size_t dim = 0;
+    for(dim = 0; dim < padding.size(); dim++)
+    {
+        build_opts.add_option(generate_pad_string(dim, 0, padding[dim].first));
+        build_opts.add_option(generate_pad_string(dim, 1, padding[dim].second));
+    }
+
+    while(dim < TensorShape::num_max_dimensions)
+    {
+        build_opts.add_option(generate_pad_string(dim, 0, 0));
+        build_opts.add_option(generate_pad_string(dim, 1, 0));
+        dim++;
+    }
+}
+
 } // namespace
 
 CLCopyKernel::CLCopyKernel()
@@ -76,32 +135,68 @@ CLCopyKernel::CLCopyKernel()
 {
 }
 
-void CLCopyKernel::configure(const ICLTensor *input, ICLTensor *output)
+void CLCopyKernel::configure(const ICLTensor *input, ICLTensor *output, const PaddingList &padding)
 {
     ARM_COMPUTE_ERROR_ON_NULLPTR(input, output);
-    ARM_COMPUTE_ERROR_THROW_ON(validate_arguments(input->info(), output->info()));
+    ARM_COMPUTE_ERROR_THROW_ON(validate_arguments(input->info(), output->info(), padding));
 
     _input  = input;
     _output = output;
 
-    const unsigned int num_elems_processed_per_iteration = 16 / input->info()->element_size();
-
     // Create kernel
     CLBuildOptions build_opts;
     build_opts.add_option("-DDATA_TYPE=" + get_cl_type_from_data_type(input->info()->data_type()));
+
+    const unsigned int num_elems_processed_per_iteration = 16 / input->info()->element_size();
     build_opts.add_option("-DVEC_SIZE=" + support::cpp11::to_string(num_elems_processed_per_iteration));
-    _kernel = static_cast<cl::Kernel>(CLKernelLibrary::get().create_kernel("copy_tensor", build_opts.options()));
 
-    // Configure kernel window
-    auto win_config = validate_and_configure_window(input->info(), output->info());
+    std::pair<Status, Window> win_config;
+
+    if(padding.empty())
+    {
+        // Build kernel
+        _kernel = static_cast<cl::Kernel>(CLKernelLibrary::get().create_kernel("copy_tensor", build_opts.options()));
+
+        // Configure window
+        win_config = validate_and_configure_window(input->info(), output->info());
+    }
+    else
+    {
+        // Add compile time options
+        add_padding_as_build_options(padding, build_opts);
+
+        // If we are padding in the fourth dimension the kernel needs to know the depth of the
+        // different cubes
+        if(padding.size() == 4)
+        {
+            const size_t depth = input->info()->tensor_shape()[2];
+            build_opts.add_option("-DDEPTH=" + support::cpp11::to_string(depth));
+        }
+
+        // Build kernel
+        _kernel = static_cast<cl::Kernel>(CLKernelLibrary::get().create_kernel("copy_pad_tensor", build_opts.options()));
+
+        // Configure window
+        win_config = validate_and_configure_window_with_padding(input->info(), output->info(), padding);
+    }
+
+    // Validate and set the window
     ARM_COMPUTE_ERROR_THROW_ON(win_config.first);
     ICLKernel::configure_internal(win_config.second);
 }
 
-Status CLCopyKernel::validate(const arm_compute::ITensorInfo *input, const arm_compute::ITensorInfo *output)
+Status CLCopyKernel::validate(const arm_compute::ITensorInfo *input, const arm_compute::ITensorInfo *output, const PaddingList &padding)
 {
-    ARM_COMPUTE_RETURN_ON_ERROR(validate_arguments(input, output));
-    ARM_COMPUTE_RETURN_ON_ERROR(validate_and_configure_window(input->clone().get(), output->clone().get()).first);
+    ARM_COMPUTE_RETURN_ON_ERROR(validate_arguments(input, output, padding));
+
+    if(padding.empty())
+    {
+        ARM_COMPUTE_RETURN_ON_ERROR(validate_and_configure_window(input->clone().get(), output->clone().get()).first);
+    }
+    else
+    {
+        ARM_COMPUTE_RETURN_ON_ERROR(validate_and_configure_window_with_padding(input->clone().get(), output->clone().get(), padding).first);
+    }
 
     return Status{};
 }
@@ -123,3 +218,4 @@ void CLCopyKernel::run(const Window &window, cl::CommandQueue &queue)
     }
     while(collapsed.slide_window_slice_3D(slice));
 }
+} // namespace arm_compute