| /* |
| * Copyright (c) 2018 Arm Limited. |
| * |
| * SPDX-License-Identifier: MIT |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to |
| * deal in the Software without restriction, including without limitation the |
| * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| * sell copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in all |
| * copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| #include "Unstack.h" |
| |
| #include "tests/validation/Helpers.h" |
| |
| namespace arm_compute |
| { |
| namespace test |
| { |
| namespace validation |
| { |
| namespace reference |
| { |
| namespace |
| { |
| inline Coordinates expand_coordinates(Coordinates in_coord, size_t axis, size_t slice, size_t num_dimensions) |
| { |
| /* |
| Reconstruct input_coord to read the corresponding value from the correct slice. This is done by adding an extra dimension |
| to the coordinates and shuffling around the values based on the info below. |
| |
| For example, if input tensor shape is (X, Y, Z, W); |
| |
| If axis == 0, each slice will have the shape (Y, Z, W) and there will be X slices |
| |
| If axis == 1, each slice will have the shape (X, Z, W) and there will be Y slices. |
| */ |
| Coordinates expanded_coord; |
| expanded_coord.set_num_dimensions(num_dimensions); |
| expanded_coord.set(axis, slice); |
| for(size_t k = 0; k < axis; ++k) |
| { |
| expanded_coord.set(k, in_coord[k]); |
| } |
| for(size_t k = axis + 1; k < num_dimensions; ++k) |
| { |
| expanded_coord.set(k, in_coord[k - 1]); |
| } |
| return expanded_coord; |
| } |
| |
| template <typename T> |
| SimpleTensor<T> get_slice(const SimpleTensor<T> &input_tensor, size_t axis, size_t slice) |
| { |
| TensorShape out_shape = input_tensor.shape(); |
| out_shape.remove_dimension(axis); |
| |
| const size_t unpacked_num_dimensions(input_tensor.shape().num_dimensions()); |
| |
| SimpleTensor<T> output{ out_shape, input_tensor.data_type() }; |
| |
| Window win; |
| win.use_tensor_dimensions(out_shape); |
| execute_window_loop(win, [&](const Coordinates & id) |
| { |
| const Coordinates input_coords = expand_coordinates(id, axis, slice, unpacked_num_dimensions); |
| *reinterpret_cast<T *>(output(id)) = *reinterpret_cast<const T *>(input_tensor(input_coords)); |
| }); |
| |
| return output; |
| } |
| } // namespace |
| |
| template <typename T> |
| std::vector<SimpleTensor<T>> unstack(const SimpleTensor<T> &input_tensor, std::vector<SimpleTensor<T>> &output_tensors, int axis) |
| { |
| // Wrap around negative values |
| const unsigned int axis_u = wrap_around(axis, static_cast<int>(input_tensor.shape().num_dimensions())); |
| ARM_COMPUTE_ERROR_ON(axis_u >= input_tensor.shape().num_dimensions()); |
| for(size_t k = 0; k < output_tensors.size(); ++k) |
| { |
| SimpleTensor<T> &output = output_tensors[k]; |
| const SimpleTensor<T> kth_slice = get_slice(input_tensor, axis_u, k); |
| output = copy_tensor<T>(kth_slice); |
| } |
| return output_tensors; |
| } |
| |
| template std::vector<SimpleTensor<float>> unstack(const SimpleTensor<float> &input_tensor, std::vector<SimpleTensor<float>> &output_tensors, int axis); |
| template std::vector<SimpleTensor<half>> unstack(const SimpleTensor<half> &input_tensor, std::vector<SimpleTensor<half>> &output_tensors, int axis); |
| template std::vector<SimpleTensor<uint8_t>> unstack(const SimpleTensor<uint8_t> &input_tensor, std::vector<SimpleTensor<uint8_t>> &output_tensors, int axis); |
| |
| } // namespace reference |
| } // namespace validation |
| } // namespace test |
| } // namespace arm_compute |