| /* |
| * Copyright (c) 2016-2018 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 "helpers.h" |
| |
| #pragma OPENCL EXTENSION cl_khr_int64_base_atomics : enable |
| |
| /** This function calculates the sum and sum of squares of a given input image. |
| * |
| * @note To enable calculation sum of squares -DSTDDEV should be passed as a preprocessor argument. |
| * |
| * @param[in] src_ptr Pointer to the source image. Supported data types: U8 |
| * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) |
| * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) |
| * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) |
| * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) |
| * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image |
| * @param[in] height Height of the input image |
| * @param[out] global_sum Global sum of all elements |
| * @param[out] global_sum_sq Global sum of squares of all elements |
| */ |
| __kernel void mean_stddev_accumulate( |
| IMAGE_DECLARATION(src), |
| uint height, |
| __global ulong *global_sum |
| #ifdef STDDEV |
| , |
| __global ulong *global_sum_sq |
| #endif /* STDDEV */ |
| ) |
| { |
| // Get pixels pointer |
| Image src = CONVERT_TO_IMAGE_STRUCT(src); |
| |
| uint8 tmp_sum = 0; |
| #ifdef STDDEV |
| uint8 tmp_sum_sq = 0; |
| #endif /* STDDEV */ |
| // Calculate partial sum |
| for(int i = 0; i < height; i++) |
| { |
| // Load data |
| uint8 data = convert_uint8(vload8(0, offset(&src, 0, i))); |
| |
| tmp_sum += data; |
| #ifdef STDDEV |
| tmp_sum_sq += data * data; |
| #endif /* STDDEV */ |
| } |
| // Perform reduction |
| tmp_sum.s0123 += tmp_sum.s4567; |
| tmp_sum.s01 += tmp_sum.s23; |
| atom_add(global_sum, tmp_sum.s0 + tmp_sum.s1); |
| |
| #ifdef STDDEV |
| tmp_sum_sq.s0123 += tmp_sum_sq.s4567; |
| tmp_sum_sq.s01 += tmp_sum_sq.s23; |
| atom_add(global_sum_sq, tmp_sum_sq.s0 + tmp_sum_sq.s1); |
| #endif /* STDDEV */ |
| } |
| |
| #pragma OPENCL EXTENSION cl_khr_int64_base_atomics : disable |