Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2017 ARM Limited. |
| 3 | * |
| 4 | * SPDX-License-Identifier: MIT |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to |
| 8 | * deal in the Software without restriction, including without limitation the |
| 9 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| 10 | * sell copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all |
| 14 | * copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 19 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 22 | * SOFTWARE. |
| 23 | */ |
| 24 | #include "arm_compute/core/AccessWindowStatic.h" |
| 25 | |
| 26 | #include "arm_compute/core/Helpers.h" |
| 27 | #include "arm_compute/core/ITensorInfo.h" |
| 28 | #include "arm_compute/core/Window.h" |
| 29 | |
| 30 | using namespace arm_compute; |
| 31 | |
| 32 | AccessWindowStatic::AccessWindowStatic(ITensorInfo *info, int start_x, int start_y, int end_x, int end_y) |
| 33 | : _info(info), _start_x(start_x), _start_y(start_y), _end_x(end_x), _end_y(end_y) |
| 34 | { |
| 35 | } |
| 36 | |
| 37 | ValidRegion AccessWindowStatic::compute_valid_region(const Window &window, ValidRegion input_valid_region, bool border_undefined, BorderSize border_size) const |
| 38 | { |
| 39 | ARM_COMPUTE_UNUSED(border_undefined); |
| 40 | ARM_COMPUTE_UNUSED(border_size); |
| 41 | |
| 42 | return compute_valid_region(window, input_valid_region); |
| 43 | } |
| 44 | |
| 45 | ValidRegion AccessWindowStatic::compute_valid_region(const Window &window, ValidRegion input_valid_region) const |
| 46 | { |
| 47 | if(_info == nullptr) |
| 48 | { |
| 49 | return input_valid_region; |
| 50 | } |
| 51 | |
| 52 | Coordinates &anchor = input_valid_region.anchor; |
| 53 | TensorShape &shape = input_valid_region.shape; |
| 54 | |
| 55 | // Start of the valid region is equal to the start of the static access but |
| 56 | // never outside of the tensor. |
| 57 | anchor.set(0, std::max<int>(0, _start_x)); |
| 58 | if(_info->num_dimensions() > 1) |
| 59 | { |
| 60 | anchor.set(1, std::max<int>(0, _start_y)); |
| 61 | } |
| 62 | |
| 63 | // End of the valid region is equal to the end of the static access but |
| 64 | // never outside of the tensor. |
| 65 | shape.set(0, std::min<int>(_end_x, _info->tensor_shape()[0])); |
| 66 | if(_info->num_dimensions() > 1) |
| 67 | { |
| 68 | shape.set(1, std::min<int>(_end_y, _info->tensor_shape()[1])); |
| 69 | } |
| 70 | |
| 71 | // For higher dimension use the intersection of the window size and the |
| 72 | // valid region of the input |
| 73 | for(size_t d = 2; d < _info->num_dimensions(); ++d) |
| 74 | { |
| 75 | anchor.set(d, std::max(window[d].start(), input_valid_region.anchor[d])); |
| 76 | shape.set(d, std::min<int>(window[d].end(), input_valid_region.shape[d]) - anchor[d]); |
| 77 | } |
| 78 | |
| 79 | return input_valid_region; |
| 80 | } |
| 81 | |
| 82 | void AccessWindowStatic::set_valid_region(const Window &window, const ValidRegion &input_valid_region) |
| 83 | { |
| 84 | if(_info != nullptr) |
| 85 | { |
| 86 | _info->set_valid_region(compute_valid_region(window, input_valid_region)); |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | bool AccessWindowStatic::update_window_if_needed(Window &window) const |
| 91 | { |
| 92 | // Only update the window size if we can't use padding |
| 93 | if(_info == nullptr || _info->is_resizable()) |
| 94 | { |
| 95 | return false; |
| 96 | } |
| 97 | |
| 98 | const TensorShape &shape = _info->tensor_shape(); |
| 99 | const Strides &strides = _info->strides_in_bytes(); |
| 100 | const size_t offset_first_element = _info->offset_first_element_in_bytes(); |
| 101 | |
| 102 | bool window_modified = false; |
| 103 | |
| 104 | int front_pad_y = 0; |
| 105 | |
| 106 | // Adjust window start for Y dimension |
| 107 | if(_start_y < 0) |
| 108 | { |
| 109 | // Calculate rows available above the tensor |
| 110 | const int front_pad_y_available = -static_cast<int>(offset_first_element / strides[1]); |
| 111 | |
| 112 | if(_start_y < front_pad_y_available) |
| 113 | { |
| 114 | // Not enough padding available, need to shrink the window |
| 115 | const int start = adjust_up(_start_y, front_pad_y_available, window.y().step()); |
| 116 | |
| 117 | window.set(1, Window::Dimension(start, window.y().end(), window.y().step())); |
| 118 | window_modified = true; |
| 119 | } |
| 120 | |
| 121 | // Update front padding with reconstructed value |
| 122 | front_pad_y = std::max(0, -window.y().start()); |
| 123 | } |
| 124 | |
| 125 | // Adjust window end for Y dimension |
| 126 | if(_end_y > static_cast<int>(shape[1])) |
| 127 | { |
| 128 | const int stride_z = _info->num_dimensions() > 2 ? strides[2] : _info->total_size(); |
| 129 | |
| 130 | // Calculate rows available below the tensor |
| 131 | const int tail_pad_y_available = (stride_z / strides[1]) - shape[1] - front_pad_y; |
| 132 | |
| 133 | if(static_cast<int>(shape[1]) + tail_pad_y_available < _end_y) |
| 134 | { |
| 135 | // Not enough padding available, need to shrink the window |
| 136 | const int end = adjust_down(_end_y, shape[1] + tail_pad_y_available, window.y().step()) + window.y().step(); |
| 137 | window.set(1, Window::Dimension(window.y().start(), end, window.y().step())); |
| 138 | window_modified = true; |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | int front_pad_x = 0; |
| 143 | |
| 144 | const int stride_y = _info->num_dimensions() > 1 ? strides[1] : _info->total_size(); |
| 145 | |
| 146 | // Adjust window start for X dimension |
| 147 | if(_start_x < 0) |
| 148 | { |
| 149 | const int front_pad_x_available = -std::min<int>(static_cast<int>(offset_first_element) - front_pad_y * strides[1], stride_y - shape[0] * strides[0]) / static_cast<int>(strides[0]); |
| 150 | |
| 151 | if(_start_x < front_pad_x_available) |
| 152 | { |
| 153 | // Not enough padding available, need to shrink the window |
| 154 | const int start = adjust_up(_start_x, front_pad_x_available, window.x().step()); |
| 155 | window.set(0, Window::Dimension(start, window.x().end(), window.x().step())); |
| 156 | window_modified = true; |
| 157 | } |
| 158 | |
| 159 | // Update front padding with reconstructed value |
| 160 | front_pad_x = std::max(0, -window.x().start()); |
| 161 | } |
| 162 | |
| 163 | // Adjust window end for X dimension |
| 164 | if(_end_x > static_cast<int>(shape[0])) |
| 165 | { |
| 166 | const int tail_pad_x_available = (stride_y / strides[0]) - shape[0] - front_pad_x; |
| 167 | |
| 168 | if(static_cast<int>(shape[0]) + tail_pad_x_available < _end_x) |
| 169 | { |
| 170 | // Not enough padding available, need to shrink the window |
| 171 | const int end = adjust_down(_end_x, shape[0] + tail_pad_x_available, window.x().step()) + window.x().step(); |
| 172 | window.set(0, Window::Dimension(window.x().start(), end, window.x().step())); |
| 173 | window_modified = true; |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | window.validate(); |
| 178 | |
| 179 | return window_modified; |
| 180 | } |
| 181 | |
| 182 | bool AccessWindowStatic::update_padding_if_needed(const Window &window) const |
| 183 | { |
| 184 | ARM_COMPUTE_UNUSED(window); |
| 185 | |
| 186 | // Only update the padding if the tensor allows it |
| 187 | if(_info == nullptr || !_info->is_resizable()) |
| 188 | { |
| 189 | return false; |
| 190 | } |
| 191 | |
| 192 | const TensorShape &shape = _info->tensor_shape(); |
| 193 | |
| 194 | PaddingSize padding; |
| 195 | padding.left = std::max(0, -_start_x); |
| 196 | padding.right = std::max<int>(0, _end_x - shape[0]); |
Georgios Pinitas | ce54b56 | 2017-09-14 17:21:51 +0100 | [diff] [blame] | 197 | padding.top = std::max(0, -_start_y); |
| 198 | padding.bottom = std::max<int>(0, _end_y - shape[1]); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 199 | |
| 200 | // Update strides in tensor info |
| 201 | return _info->extend_padding(padding); |
| 202 | } |