Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1 | /* |
Michele Di Giorgio | d9eaf61 | 2020-07-08 11:12:57 +0100 | [diff] [blame] | 2 | * Copyright (c) 2016, 2017 Arm Limited. |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 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 "helpers.h" |
| 25 | |
| 26 | #define VATOMIC_INC16(histogram, win_pos) \ |
| 27 | { \ |
| 28 | atomic_inc(histogram + win_pos.s0); \ |
| 29 | atomic_inc(histogram + win_pos.s1); \ |
| 30 | atomic_inc(histogram + win_pos.s2); \ |
| 31 | atomic_inc(histogram + win_pos.s3); \ |
| 32 | atomic_inc(histogram + win_pos.s4); \ |
| 33 | atomic_inc(histogram + win_pos.s5); \ |
| 34 | atomic_inc(histogram + win_pos.s6); \ |
| 35 | atomic_inc(histogram + win_pos.s7); \ |
| 36 | atomic_inc(histogram + win_pos.s8); \ |
| 37 | atomic_inc(histogram + win_pos.s9); \ |
| 38 | atomic_inc(histogram + win_pos.sa); \ |
| 39 | atomic_inc(histogram + win_pos.sb); \ |
| 40 | atomic_inc(histogram + win_pos.sc); \ |
| 41 | atomic_inc(histogram + win_pos.sd); \ |
| 42 | atomic_inc(histogram + win_pos.se); \ |
| 43 | atomic_inc(histogram + win_pos.sf); \ |
| 44 | } |
| 45 | |
| 46 | /** Calculate the histogram of an 8 bit grayscale image. |
| 47 | * |
| 48 | * Each thread will process 16 pixels and use one local atomic operation per pixel. |
| 49 | * When all work items in a work group are done the resulting local histograms are |
| 50 | * added to the global histogram using global atomics. |
| 51 | * |
| 52 | * @note The input image is represented as a two-dimensional array of type uchar. |
| 53 | * The output is represented as a one-dimensional uint array of length of num_bins |
| 54 | * |
| 55 | * @param[in] input_ptr Pointer to the first source image. Supported data types: U8 |
| 56 | * @param[in] input_stride_x Stride of the first source image in X dimension (in bytes) |
| 57 | * @param[in] input_step_x input_stride_x * number of elements along X processed per workitem(in bytes) |
| 58 | * @param[in] input_stride_y Stride of the first source image in Y dimension (in bytes) |
| 59 | * @param[in] input_step_y input_stride_y * number of elements along Y processed per workitem(in bytes) |
| 60 | * @param[in] input_offset_first_element_in_bytes The offset of the first element in the first source image |
| 61 | * @param[in] histogram_local The local buffer to hold histogram result in per workgroup. Supported data types: U32 |
| 62 | * @param[out] histogram The output buffer to hold histogram final result. Supported data types: U32 |
| 63 | * @param[out] num_bins The number of bins |
| 64 | * @param[out] offset The start of values to use (inclusive) |
| 65 | * @param[out] range The range of a bin |
| 66 | * @param[out] offrange The maximum value (exclusive) |
| 67 | */ |
| 68 | __kernel void hist_local_kernel(IMAGE_DECLARATION(input), |
| 69 | __local uint *histogram_local, |
| 70 | __global uint *restrict histogram, |
| 71 | uint num_bins, |
| 72 | uint offset, |
| 73 | uint range, |
| 74 | uint offrange) |
| 75 | { |
| 76 | Image input_buffer = CONVERT_TO_IMAGE_STRUCT(input); |
| 77 | uint local_id_x = get_local_id(0); |
| 78 | |
| 79 | uint local_x_size = get_local_size(0); |
| 80 | |
| 81 | if(num_bins > local_x_size) |
| 82 | { |
| 83 | for(int i = local_id_x; i < num_bins; i += local_x_size) |
| 84 | { |
| 85 | histogram_local[i] = 0; |
| 86 | } |
| 87 | } |
| 88 | else |
| 89 | { |
| 90 | if(local_id_x <= num_bins) |
| 91 | { |
| 92 | histogram_local[local_id_x] = 0; |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | uint16 vals = convert_uint16(vload16(0, input_buffer.ptr)); |
| 97 | |
| 98 | uint16 win_pos = select(num_bins, ((vals - offset) * num_bins) / range, (vals >= offset && vals < offrange)); |
| 99 | |
| 100 | barrier(CLK_LOCAL_MEM_FENCE); |
| 101 | VATOMIC_INC16(histogram_local, win_pos); |
| 102 | barrier(CLK_LOCAL_MEM_FENCE); |
| 103 | |
| 104 | if(num_bins > local_x_size) |
| 105 | { |
| 106 | for(int i = local_id_x; i < num_bins; i += local_x_size) |
| 107 | { |
| 108 | atomic_add(histogram + i, histogram_local[i]); |
| 109 | } |
| 110 | } |
| 111 | else |
| 112 | { |
| 113 | if(local_id_x <= num_bins) |
| 114 | { |
| 115 | atomic_add(histogram + local_id_x, histogram_local[local_id_x]); |
| 116 | } |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | /** Calculate the histogram of an 8 bit grayscale image's border. |
| 121 | * |
| 122 | * Each thread will process one pixel using global atomic. |
| 123 | * When all work items in a work group are done the resulting local histograms are |
| 124 | * added to the global histogram using global atomics. |
| 125 | * |
| 126 | * @note The input image is represented as a two-dimensional array of type uchar. |
| 127 | * The output is represented as a one-dimensional uint array of length of num_bins |
| 128 | * |
| 129 | * @param[in] input_ptr Pointer to the first source image. Supported data types: U8 |
| 130 | * @param[in] input_stride_x Stride of the first source image in X dimension (in bytes) |
| 131 | * @param[in] input_step_x input_stride_x * number of elements along X processed per workitem(in bytes) |
| 132 | * @param[in] input_stride_y Stride of the first source image in Y dimension (in bytes) |
| 133 | * @param[in] input_step_y input_stride_y * number of elements along Y processed per workitem(in bytes) |
| 134 | * @param[in] input_offset_first_element_in_bytes The offset of the first element in the first source image |
| 135 | * @param[out] histogram The output buffer to hold histogram final result. Supported data types: U32 |
| 136 | * @param[out] num_bins The number of bins |
| 137 | * @param[out] offset The start of values to use (inclusive) |
| 138 | * @param[out] range The range of a bin |
| 139 | * @param[out] offrange The maximum value (exclusive) |
| 140 | */ |
| 141 | __kernel void hist_border_kernel(IMAGE_DECLARATION(input), |
| 142 | __global uint *restrict histogram, |
| 143 | uint num_bins, |
| 144 | uint offset, |
| 145 | uint range, |
| 146 | uint offrange) |
| 147 | { |
| 148 | Image input_buffer = CONVERT_TO_IMAGE_STRUCT(input); |
| 149 | |
| 150 | uint val = (uint)(*input_buffer.ptr); |
| 151 | |
| 152 | uint win_pos = (val >= offset) ? (((val - offset) * num_bins) / range) : 0; |
| 153 | |
| 154 | if(val >= offset && (val < offrange)) |
| 155 | { |
| 156 | atomic_inc(histogram + win_pos); |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | /** Calculate the histogram of an 8 bit grayscale image with bin size of 256 and window size of 1. |
| 161 | * |
| 162 | * Each thread will process 16 pixels and use one local atomic operation per pixel. |
| 163 | * When all work items in a work group are done the resulting local histograms are |
| 164 | * added to the global histogram using global atomics. |
| 165 | * |
| 166 | * @note The input image is represented as a two-dimensional array of type uchar. |
| 167 | * The output is represented as a one-dimensional uint array of 256 elements |
| 168 | * |
| 169 | * @param[in] input_ptr Pointer to the first source image. Supported data types: U8 |
| 170 | * @param[in] input_stride_x Stride of the first source image in X dimension (in bytes) |
| 171 | * @param[in] input_step_x input_stride_x * number of elements along X processed per workitem(in bytes) |
| 172 | * @param[in] input_stride_y Stride of the first source image in Y dimension (in bytes) |
| 173 | * @param[in] input_step_y input_stride_y * number of elements along Y processed per workitem(in bytes) |
| 174 | * @param[in] input_offset_first_element_in_bytes The offset of the first element in the first source image |
| 175 | * @param[in] histogram_local The local buffer to hold histogram result in per workgroup. Supported data types: U32 |
| 176 | * @param[out] histogram The output buffer to hold histogram final result. Supported data types: U32 |
| 177 | */ |
| 178 | __kernel void hist_local_kernel_fixed(IMAGE_DECLARATION(input), |
| 179 | __local uint *histogram_local, |
| 180 | __global uint *restrict histogram) |
| 181 | { |
| 182 | Image input_buffer = CONVERT_TO_IMAGE_STRUCT(input); |
| 183 | |
| 184 | uint local_index = get_local_id(0); |
| 185 | uint local_x_size = get_local_size(0); |
| 186 | |
| 187 | for(int i = local_index; i < 256; i += local_x_size) |
| 188 | { |
| 189 | histogram_local[i] = 0; |
| 190 | } |
| 191 | |
| 192 | uint16 vals = convert_uint16(vload16(0, input_buffer.ptr)); |
| 193 | |
| 194 | barrier(CLK_LOCAL_MEM_FENCE); |
| 195 | |
| 196 | atomic_inc(histogram_local + vals.s0); |
| 197 | atomic_inc(histogram_local + vals.s1); |
| 198 | atomic_inc(histogram_local + vals.s2); |
| 199 | atomic_inc(histogram_local + vals.s3); |
| 200 | atomic_inc(histogram_local + vals.s4); |
| 201 | atomic_inc(histogram_local + vals.s5); |
| 202 | atomic_inc(histogram_local + vals.s6); |
| 203 | atomic_inc(histogram_local + vals.s7); |
| 204 | atomic_inc(histogram_local + vals.s8); |
| 205 | atomic_inc(histogram_local + vals.s9); |
| 206 | atomic_inc(histogram_local + vals.sa); |
| 207 | atomic_inc(histogram_local + vals.sb); |
| 208 | atomic_inc(histogram_local + vals.sc); |
| 209 | atomic_inc(histogram_local + vals.sd); |
| 210 | atomic_inc(histogram_local + vals.se); |
| 211 | atomic_inc(histogram_local + vals.sf); |
| 212 | |
| 213 | barrier(CLK_LOCAL_MEM_FENCE); |
| 214 | |
| 215 | for(int i = local_index; i < 256; i += local_x_size) |
| 216 | { |
| 217 | atomic_add(histogram + i, histogram_local[i]); |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | /** Calculate the histogram of an 8 bit grayscale image with bin size as 256 and window size as 1. |
| 222 | * |
| 223 | * Each thread will process one pixel using global atomic. |
| 224 | * When all work items in a work group are done the resulting local histograms are |
| 225 | * added to the global histogram using global atomics. |
| 226 | * |
| 227 | * @note The input image is represented as a two-dimensional array of type uchar. |
| 228 | * The output is represented as a one-dimensional uint array of 256 |
| 229 | * |
| 230 | * @param[in] input_ptr Pointer to the first source image. Supported data types: U8 |
| 231 | * @param[in] input_stride_x Stride of the first source image in X dimension (in bytes) |
| 232 | * @param[in] input_step_x input_stride_x * number of elements along X processed per workitem(in bytes) |
| 233 | * @param[in] input_stride_y Stride of the first source image in Y dimension (in bytes) |
| 234 | * @param[in] input_step_y input_stride_y * number of elements along Y processed per workitem(in bytes) |
| 235 | * @param[in] input_offset_first_element_in_bytes The offset of the first element in the first source image |
| 236 | * @param[out] histogram The output buffer to hold histogram final result. Supported data types: U32 |
| 237 | */ |
| 238 | __kernel void hist_border_kernel_fixed(IMAGE_DECLARATION(input), |
| 239 | __global uint *restrict histogram) |
| 240 | { |
| 241 | Image input_buffer = CONVERT_TO_IMAGE_STRUCT(input); |
| 242 | atomic_inc(histogram + *input_buffer.ptr); |
| 243 | } |