| /* |
| * Copyright (c) 2016, 2017 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 "helpers.h" |
| |
| #define VATOMIC_INC16(histogram, win_pos) \ |
| { \ |
| atomic_inc(histogram + win_pos.s0); \ |
| atomic_inc(histogram + win_pos.s1); \ |
| atomic_inc(histogram + win_pos.s2); \ |
| atomic_inc(histogram + win_pos.s3); \ |
| atomic_inc(histogram + win_pos.s4); \ |
| atomic_inc(histogram + win_pos.s5); \ |
| atomic_inc(histogram + win_pos.s6); \ |
| atomic_inc(histogram + win_pos.s7); \ |
| atomic_inc(histogram + win_pos.s8); \ |
| atomic_inc(histogram + win_pos.s9); \ |
| atomic_inc(histogram + win_pos.sa); \ |
| atomic_inc(histogram + win_pos.sb); \ |
| atomic_inc(histogram + win_pos.sc); \ |
| atomic_inc(histogram + win_pos.sd); \ |
| atomic_inc(histogram + win_pos.se); \ |
| atomic_inc(histogram + win_pos.sf); \ |
| } |
| |
| /** Calculate the histogram of an 8 bit grayscale image. |
| * |
| * Each thread will process 16 pixels and use one local atomic operation per pixel. |
| * When all work items in a work group are done the resulting local histograms are |
| * added to the global histogram using global atomics. |
| * |
| * @note The input image is represented as a two-dimensional array of type uchar. |
| * The output is represented as a one-dimensional uint array of length of num_bins |
| * |
| * @param[in] input_ptr Pointer to the first source image. Supported data types: U8 |
| * @param[in] input_stride_x Stride of the first source image in X dimension (in bytes) |
| * @param[in] input_step_x input_stride_x * number of elements along X processed per workitem(in bytes) |
| * @param[in] input_stride_y Stride of the first source image in Y dimension (in bytes) |
| * @param[in] input_step_y input_stride_y * number of elements along Y processed per workitem(in bytes) |
| * @param[in] input_offset_first_element_in_bytes The offset of the first element in the first source image |
| * @param[in] histogram_local The local buffer to hold histogram result in per workgroup. Supported data types: U32 |
| * @param[out] histogram The output buffer to hold histogram final result. Supported data types: U32 |
| * @param[out] num_bins The number of bins |
| * @param[out] offset The start of values to use (inclusive) |
| * @param[out] range The range of a bin |
| * @param[out] offrange The maximum value (exclusive) |
| */ |
| __kernel void hist_local_kernel(IMAGE_DECLARATION(input), |
| __local uint *histogram_local, |
| __global uint *restrict histogram, |
| uint num_bins, |
| uint offset, |
| uint range, |
| uint offrange) |
| { |
| Image input_buffer = CONVERT_TO_IMAGE_STRUCT(input); |
| uint local_id_x = get_local_id(0); |
| |
| uint local_x_size = get_local_size(0); |
| |
| if(num_bins > local_x_size) |
| { |
| for(int i = local_id_x; i < num_bins; i += local_x_size) |
| { |
| histogram_local[i] = 0; |
| } |
| } |
| else |
| { |
| if(local_id_x <= num_bins) |
| { |
| histogram_local[local_id_x] = 0; |
| } |
| } |
| |
| uint16 vals = convert_uint16(vload16(0, input_buffer.ptr)); |
| |
| uint16 win_pos = select(num_bins, ((vals - offset) * num_bins) / range, (vals >= offset && vals < offrange)); |
| |
| barrier(CLK_LOCAL_MEM_FENCE); |
| VATOMIC_INC16(histogram_local, win_pos); |
| barrier(CLK_LOCAL_MEM_FENCE); |
| |
| if(num_bins > local_x_size) |
| { |
| for(int i = local_id_x; i < num_bins; i += local_x_size) |
| { |
| atomic_add(histogram + i, histogram_local[i]); |
| } |
| } |
| else |
| { |
| if(local_id_x <= num_bins) |
| { |
| atomic_add(histogram + local_id_x, histogram_local[local_id_x]); |
| } |
| } |
| } |
| |
| /** Calculate the histogram of an 8 bit grayscale image's border. |
| * |
| * Each thread will process one pixel using global atomic. |
| * When all work items in a work group are done the resulting local histograms are |
| * added to the global histogram using global atomics. |
| * |
| * @note The input image is represented as a two-dimensional array of type uchar. |
| * The output is represented as a one-dimensional uint array of length of num_bins |
| * |
| * @param[in] input_ptr Pointer to the first source image. Supported data types: U8 |
| * @param[in] input_stride_x Stride of the first source image in X dimension (in bytes) |
| * @param[in] input_step_x input_stride_x * number of elements along X processed per workitem(in bytes) |
| * @param[in] input_stride_y Stride of the first source image in Y dimension (in bytes) |
| * @param[in] input_step_y input_stride_y * number of elements along Y processed per workitem(in bytes) |
| * @param[in] input_offset_first_element_in_bytes The offset of the first element in the first source image |
| * @param[out] histogram The output buffer to hold histogram final result. Supported data types: U32 |
| * @param[out] num_bins The number of bins |
| * @param[out] offset The start of values to use (inclusive) |
| * @param[out] range The range of a bin |
| * @param[out] offrange The maximum value (exclusive) |
| */ |
| __kernel void hist_border_kernel(IMAGE_DECLARATION(input), |
| __global uint *restrict histogram, |
| uint num_bins, |
| uint offset, |
| uint range, |
| uint offrange) |
| { |
| Image input_buffer = CONVERT_TO_IMAGE_STRUCT(input); |
| |
| uint val = (uint)(*input_buffer.ptr); |
| |
| uint win_pos = (val >= offset) ? (((val - offset) * num_bins) / range) : 0; |
| |
| if(val >= offset && (val < offrange)) |
| { |
| atomic_inc(histogram + win_pos); |
| } |
| } |
| |
| /** Calculate the histogram of an 8 bit grayscale image with bin size of 256 and window size of 1. |
| * |
| * Each thread will process 16 pixels and use one local atomic operation per pixel. |
| * When all work items in a work group are done the resulting local histograms are |
| * added to the global histogram using global atomics. |
| * |
| * @note The input image is represented as a two-dimensional array of type uchar. |
| * The output is represented as a one-dimensional uint array of 256 elements |
| * |
| * @param[in] input_ptr Pointer to the first source image. Supported data types: U8 |
| * @param[in] input_stride_x Stride of the first source image in X dimension (in bytes) |
| * @param[in] input_step_x input_stride_x * number of elements along X processed per workitem(in bytes) |
| * @param[in] input_stride_y Stride of the first source image in Y dimension (in bytes) |
| * @param[in] input_step_y input_stride_y * number of elements along Y processed per workitem(in bytes) |
| * @param[in] input_offset_first_element_in_bytes The offset of the first element in the first source image |
| * @param[in] histogram_local The local buffer to hold histogram result in per workgroup. Supported data types: U32 |
| * @param[out] histogram The output buffer to hold histogram final result. Supported data types: U32 |
| */ |
| __kernel void hist_local_kernel_fixed(IMAGE_DECLARATION(input), |
| __local uint *histogram_local, |
| __global uint *restrict histogram) |
| { |
| Image input_buffer = CONVERT_TO_IMAGE_STRUCT(input); |
| |
| uint local_index = get_local_id(0); |
| uint local_x_size = get_local_size(0); |
| |
| for(int i = local_index; i < 256; i += local_x_size) |
| { |
| histogram_local[i] = 0; |
| } |
| |
| uint16 vals = convert_uint16(vload16(0, input_buffer.ptr)); |
| |
| barrier(CLK_LOCAL_MEM_FENCE); |
| |
| atomic_inc(histogram_local + vals.s0); |
| atomic_inc(histogram_local + vals.s1); |
| atomic_inc(histogram_local + vals.s2); |
| atomic_inc(histogram_local + vals.s3); |
| atomic_inc(histogram_local + vals.s4); |
| atomic_inc(histogram_local + vals.s5); |
| atomic_inc(histogram_local + vals.s6); |
| atomic_inc(histogram_local + vals.s7); |
| atomic_inc(histogram_local + vals.s8); |
| atomic_inc(histogram_local + vals.s9); |
| atomic_inc(histogram_local + vals.sa); |
| atomic_inc(histogram_local + vals.sb); |
| atomic_inc(histogram_local + vals.sc); |
| atomic_inc(histogram_local + vals.sd); |
| atomic_inc(histogram_local + vals.se); |
| atomic_inc(histogram_local + vals.sf); |
| |
| barrier(CLK_LOCAL_MEM_FENCE); |
| |
| for(int i = local_index; i < 256; i += local_x_size) |
| { |
| atomic_add(histogram + i, histogram_local[i]); |
| } |
| } |
| |
| /** Calculate the histogram of an 8 bit grayscale image with bin size as 256 and window size as 1. |
| * |
| * Each thread will process one pixel using global atomic. |
| * When all work items in a work group are done the resulting local histograms are |
| * added to the global histogram using global atomics. |
| * |
| * @note The input image is represented as a two-dimensional array of type uchar. |
| * The output is represented as a one-dimensional uint array of 256 |
| * |
| * @param[in] input_ptr Pointer to the first source image. Supported data types: U8 |
| * @param[in] input_stride_x Stride of the first source image in X dimension (in bytes) |
| * @param[in] input_step_x input_stride_x * number of elements along X processed per workitem(in bytes) |
| * @param[in] input_stride_y Stride of the first source image in Y dimension (in bytes) |
| * @param[in] input_step_y input_stride_y * number of elements along Y processed per workitem(in bytes) |
| * @param[in] input_offset_first_element_in_bytes The offset of the first element in the first source image |
| * @param[out] histogram The output buffer to hold histogram final result. Supported data types: U32 |
| */ |
| __kernel void hist_border_kernel_fixed(IMAGE_DECLARATION(input), |
| __global uint *restrict histogram) |
| { |
| Image input_buffer = CONVERT_TO_IMAGE_STRUCT(input); |
| atomic_inc(histogram + *input_buffer.ptr); |
| } |