| Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2016, 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 "helpers.h" |
| 25 | |
| 26 | #pragma OPENCL EXTENSION cl_khr_int64_base_atomics : enable |
| 27 | #pragma OPENCL EXTENSION cl_khr_int64_extended_atomics : enable |
| 28 | |
| 29 | /** This function calculates the sum and sum of squares of a given input image. |
| 30 | * |
| 31 | * @note To enable calculation sum of squares -DSTDDEV should be passed as a preprocessor argument. |
| 32 | * |
| 33 | * @param[in] src_ptr Pointer to the source image. Supported data types: U8 |
| 34 | * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) |
| 35 | * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) |
| 36 | * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) |
| 37 | * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) |
| 38 | * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image |
| 39 | * @param[in] height Height of the input image |
| 40 | * @param[out] global_sum Global sum of all elements |
| 41 | * @param[out] global_sum_sq Global sum of squares of all elements |
| 42 | */ |
| 43 | __kernel void mean_stddev_accumulate( |
| 44 | IMAGE_DECLARATION(src), |
| 45 | uint height, |
| 46 | __global ulong *global_sum |
| 47 | #if defined STDDEV |
| 48 | , |
| 49 | __global ulong *global_sum_sq |
| 50 | #endif |
| 51 | ) |
| 52 | { |
| 53 | // Get pixels pointer |
| 54 | Image src = CONVERT_TO_IMAGE_STRUCT(src); |
| 55 | |
| 56 | uint8 tmp_sum = 0; |
| 57 | #if defined STDDEV |
| 58 | uint8 tmp_sum_sq = 0; |
| 59 | #endif |
| 60 | // Calculate partial sum |
| 61 | for(int i = 0; i < height; i++) |
| 62 | { |
| 63 | // Load data |
| 64 | uint8 data = convert_uint8(vload8(0, offset(&src, 0, i))); |
| 65 | |
| 66 | tmp_sum += data; |
| 67 | #if defined STDDEV |
| 68 | tmp_sum_sq += data * data; |
| 69 | #endif |
| 70 | } |
| 71 | // Perform reduction |
| 72 | tmp_sum.s0123 += tmp_sum.s4567; |
| 73 | tmp_sum.s01 += tmp_sum.s23; |
| 74 | atom_add(global_sum, tmp_sum.s0 + tmp_sum.s1); |
| 75 | |
| 76 | #if defined STDDEV |
| 77 | tmp_sum_sq.s0123 += tmp_sum_sq.s4567; |
| 78 | tmp_sum_sq.s01 += tmp_sum_sq.s23; |
| 79 | atom_add(global_sum_sq, tmp_sum_sq.s0 + tmp_sum_sq.s1); |
| 80 | #endif |
| 81 | } |
| 82 | |
| 83 | #pragma OPENCL EXTENSION cl_khr_int64_base_atomics : disable |
| 84 | #pragma OPENCL EXTENSION cl_khr_int64_extended_atomics : disable |