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/*
* Copyright (c) 2019 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"
/** Generate all the region of interests based on the image size and the anchors passed in. For each element (x,y) of the
* grid, it will generate NUM_ANCHORS rois, given by shifting the grid position to match the anchor.
*
* @attention The following variables must be passed at compile time:
* -# -DDATA_TYPE= Tensor data type. Supported data types: F16/F32
* -# -DHEIGHT= Height of the feature map on which this kernel is applied
* -# -DWIDTH= Width of the feature map on which this kernel is applied
* -# -DNUM_ANCHORS= Number of anchors to be used to generate the rois per each pixel
* -# -DSTRIDE= Stride to be applied at each different pixel position (i.e., x_range = (1:WIDTH)*STRIDE and y_range = (1:HEIGHT)*STRIDE
* -# -DNUM_ROI_FIELDS= Number of fields used to represent a roi
*
* @param[in] anchors_ptr Pointer to the anchors tensor. Supported data types: F16/F32
* @param[in] anchors_stride_x Stride of the anchors tensor in X dimension (in bytes)
* @param[in] anchors_step_x anchors_stride_x * number of elements along X processed per workitem(in bytes)
* @param[in] anchors_stride_y Stride of the anchors tensor in Y dimension (in bytes)
* @param[in] anchors_step_y anchors_stride_y * number of elements along Y processed per workitem(in bytes)
* @param[in] anchors_stride_z Stride of the source tensor in Z dimension (in bytes)
* @param[in] anchors_step_z anchors_stride_z * number of elements along Z processed per workitem(in bytes)
* @param[in] anchors_offset_first_element_in_bytes The offset of the first element in the boxes tensor
* @param[out] rois_ptr Pointer to the rois. Supported data types: same as @p in_ptr
* @param[out] rois_stride_x Stride of the rois in X dimension (in bytes)
* @param[out] rois_step_x pred_boxes_stride_x * number of elements along X processed per workitem(in bytes)
* @param[out] rois_stride_y Stride of the rois in Y dimension (in bytes)
* @param[out] rois_step_y pred_boxes_stride_y * number of elements along Y processed per workitem(in bytes)
* @param[out] rois_stride_z Stride of the rois in Z dimension (in bytes)
* @param[out] rois_step_z pred_boxes_stride_z * number of elements along Z processed per workitem(in bytes)
* @param[out] rois_offset_first_element_in_bytes The offset of the first element in the rois
*/
#if defined(DATA_TYPE) && defined(WIDTH) && defined(HEIGHT) && defined(NUM_ANCHORS) && defined(STRIDE) && defined(NUM_ROI_FIELDS)
__kernel void generate_proposals_compute_all_anchors(
VECTOR_DECLARATION(anchors),
VECTOR_DECLARATION(rois))
{
Vector anchors = CONVERT_TO_VECTOR_STRUCT_NO_STEP(anchors);
Vector rois = CONVERT_TO_VECTOR_STRUCT(rois);
const size_t idx = get_global_id(0);
// Find the index of the anchor
const size_t anchor_idx = idx % NUM_ANCHORS;
// Find which shift is this thread using
const size_t shift_idx = idx / NUM_ANCHORS;
// Compute the shift on the X and Y direction (the shift depends exclusively by the index thread id)
const DATA_TYPE
shift_x = (DATA_TYPE)(shift_idx % WIDTH) * STRIDE;
const DATA_TYPE
shift_y = (DATA_TYPE)(shift_idx / WIDTH) * STRIDE;
const VEC_DATA_TYPE(DATA_TYPE, NUM_ROI_FIELDS)
shift = (VEC_DATA_TYPE(DATA_TYPE, NUM_ROI_FIELDS))(shift_x, shift_y, shift_x, shift_y);
// Read the given anchor
const VEC_DATA_TYPE(DATA_TYPE, NUM_ROI_FIELDS)
anchor = vload4(0, (__global DATA_TYPE *)vector_offset(&anchors, anchor_idx * NUM_ROI_FIELDS));
// Apply the shift to the anchor
const VEC_DATA_TYPE(DATA_TYPE, NUM_ROI_FIELDS)
shifted_anchor = anchor + shift;
vstore4(shifted_anchor, 0, (__global DATA_TYPE *)rois.ptr);
}
#endif //defined(DATA_TYPE) && defined(WIDTH) && defined(HEIGHT) && defined(NUM_ANCHORS) && defined(STRIDE) && defined(NUM_ROI_FIELDS)
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