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 | /** This function computes the horizontal integral of the image. |
| 27 | * |
| 28 | * @param[in] src_ptr Pointer to the source image. Supported data types: U8 |
| 29 | * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) |
| 30 | * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) |
| 31 | * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) |
| 32 | * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) |
| 33 | * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image |
| 34 | * @param[out] dst_ptr Pointer to the destination image. Supported data types: U32 |
| 35 | * @param[in] dst_stride_x Stride of the destination image in X dimension (in bytes) |
| 36 | * @param[in] dst_step_x dst_stride_x * number of elements along X processed per workitem(in bytes) |
| 37 | * @param[in] dst_stride_y Stride of the destination image in Y dimension (in bytes) |
| 38 | * @param[in] dst_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes) |
| 39 | * @param[in] dst_offset_first_element_in_bytes The offset of the first element in the destination image |
| 40 | */ |
| 41 | __kernel void integral_horizontal( |
| 42 | IMAGE_DECLARATION(src), |
| 43 | IMAGE_DECLARATION(dst)) |
| 44 | { |
| 45 | Image src = CONVERT_TO_IMAGE_STRUCT(src); |
| 46 | Image dst = CONVERT_TO_IMAGE_STRUCT(dst); |
| 47 | |
| 48 | uint prev = 0; |
| 49 | |
| 50 | for(uint j = 0; j < src_step_x; j += 16) |
| 51 | { |
| 52 | barrier(CLK_GLOBAL_MEM_FENCE); |
| 53 | uint16 res = convert_uint16(vload16(0, offset(&src, j, 0))); |
| 54 | res.s0 += prev; |
| 55 | res.s1 += res.s0; |
| 56 | res.s2 += res.s1; |
| 57 | res.s3 += res.s2; |
| 58 | res.s4 += res.s3; |
| 59 | res.s5 += res.s4; |
| 60 | res.s6 += res.s5; |
| 61 | res.s7 += res.s6; |
| 62 | res.s8 += res.s7; |
| 63 | res.s9 += res.s8; |
| 64 | res.sA += res.s9; |
| 65 | res.sB += res.sA; |
| 66 | res.sC += res.sB; |
| 67 | res.sD += res.sC; |
| 68 | res.sE += res.sD; |
| 69 | res.sF += res.sE; |
| 70 | prev = res.sF; |
| 71 | vstore16(res, 0, (__global uint *)offset(&dst, j, 0)); |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | /** This function computes the vertical integral of the image. |
| 76 | * |
| 77 | * @param[in,out] src_ptr Pointer to the source image. Supported data types: U32 |
| 78 | * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) |
| 79 | * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) |
| 80 | * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) |
| 81 | * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) |
| 82 | * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image |
| 83 | * @param[in] height Image height. |
| 84 | */ |
| 85 | __kernel void integral_vertical( |
| 86 | IMAGE_DECLARATION(src), |
| 87 | uint height) |
| 88 | { |
| 89 | Image src = CONVERT_TO_IMAGE_STRUCT(src); |
| 90 | |
| 91 | uint8 prev = vload8(0, (__global uint *)offset(&src, 0, 0)); |
| 92 | for(uint j = 1; j < height; ++j) |
| 93 | { |
| 94 | barrier(CLK_GLOBAL_MEM_FENCE); |
| 95 | uint8 res = vload8(0, (__global uint *)offset(&src, 0, j)); |
| 96 | res += prev; |
| 97 | vstore8(res, 0, (__global uint *)offset(&src, 0, j)); |
| 98 | prev = res; |
| 99 | } |
| 100 | } |