1/* 2 * Copyright (c) 2019-2021 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/** Generate all the region of interests based on the image size and the anchors passed in. For each element (x,y) of the 27 * grid, it will generate NUM_ANCHORS rois, given by shifting the grid position to match the anchor. 28 * 29 * @attention The following variables must be passed at compile time: 30 * -# -DDATA_TYPE= Tensor data type. Supported data types: F16/F32 31 * -# -DHEIGHT= Height of the feature map on which this kernel is applied 32 * -# -DWIDTH= Width of the feature map on which this kernel is applied 33 * -# -DNUM_ANCHORS= Number of anchors to be used to generate the rois per each pixel 34 * -# -DSTRIDE= Stride to be applied at each different pixel position (i.e., x_range = (1:WIDTH)*STRIDE and y_range = (1:HEIGHT)*STRIDE 35 * -# -DNUM_ROI_FIELDS= Number of fields used to represent a roi 36 * 37 * @param[in] anchors_ptr Pointer to the anchors tensor. Supported data types: F16/F32 38 * @param[in] anchors_stride_x Stride of the anchors tensor in X dimension (in bytes) 39 * @param[in] anchors_step_x anchors_stride_x * number of elements along X processed per workitem(in bytes) 40 * @param[in] anchors_stride_y Stride of the anchors tensor in Y dimension (in bytes) 41 * @param[in] anchors_step_y anchors_stride_y * number of elements along Y processed per workitem(in bytes) 42 * @param[in] anchors_stride_z Stride of the source tensor in Z dimension (in bytes) 43 * @param[in] anchors_step_z anchors_stride_z * number of elements along Z processed per workitem(in bytes) 44 * @param[in] anchors_offset_first_element_in_bytes The offset of the first element in the boxes tensor 45 * @param[out] rois_ptr Pointer to the rois. Supported data types: same as @p in_ptr 46 * @param[out] rois_stride_x Stride of the rois in X dimension (in bytes) 47 * @param[out] rois_step_x pred_boxes_stride_x * number of elements along X processed per workitem(in bytes) 48 * @param[out] rois_stride_y Stride of the rois in Y dimension (in bytes) 49 * @param[out] rois_step_y pred_boxes_stride_y * number of elements along Y processed per workitem(in bytes) 50 * @param[out] rois_stride_z Stride of the rois in Z dimension (in bytes) 51 * @param[out] rois_step_z pred_boxes_stride_z * number of elements along Z processed per workitem(in bytes) 52 * @param[out] rois_offset_first_element_in_bytes The offset of the first element in the rois 53 */ 54#if defined(DATA_TYPE) && defined(WIDTH) && defined(HEIGHT) && defined(NUM_ANCHORS) && defined(STRIDE) && defined(NUM_ROI_FIELDS) 55__kernel void generate_proposals_compute_all_anchors( 56 VECTOR_DECLARATION(anchors), 57 VECTOR_DECLARATION(rois)) 58{ 59 Vector anchors = CONVERT_TO_VECTOR_STRUCT_NO_STEP(anchors); 60 Vector rois = CONVERT_TO_VECTOR_STRUCT(rois); 61 62 const size_t idx = get_global_id(0); 63 // Find the index of the anchor 64 const size_t anchor_idx = idx % NUM_ANCHORS; 65 66 // Find which shift is this thread using 67 const size_t shift_idx = idx / NUM_ANCHORS; 68 69 // Compute the shift on the X and Y direction (the shift depends exclusively by the index thread id) 70 const DATA_TYPE 71 shift_x = (DATA_TYPE)(shift_idx % WIDTH) * STRIDE; 72 const DATA_TYPE 73 shift_y = (DATA_TYPE)(shift_idx / WIDTH) * STRIDE; 74 75 const VEC_DATA_TYPE(DATA_TYPE, NUM_ROI_FIELDS) 76 shift = (VEC_DATA_TYPE(DATA_TYPE, NUM_ROI_FIELDS))(shift_x, shift_y, shift_x, shift_y); 77 78 // Read the given anchor 79 const VEC_DATA_TYPE(DATA_TYPE, NUM_ROI_FIELDS) 80 anchor = vload4(0, (__global DATA_TYPE *)vector_offset(&anchors, anchor_idx * NUM_ROI_FIELDS)); 81 82 // Apply the shift to the anchor 83 const VEC_DATA_TYPE(DATA_TYPE, NUM_ROI_FIELDS) 84 shifted_anchor = anchor + shift; 85 86 vstore4(shifted_anchor, 0, (__global DATA_TYPE *)rois.ptr); 87} 88#endif //defined(DATA_TYPE) && defined(WIDTH) && defined(HEIGHT) && defined(NUM_ANCHORS) && defined(STRIDE) && defined(NUM_ROI_FIELDS) 89