/************************************************************************************* * Copyright (c) 2015, Advanced Micro Devices, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation and/or * other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. **************************************************************************************/ __kernel void col2im(const int n, __global const T* data_col, const int col_offset, const int height, const int width, const int channels, const int patch_h, const int patch_w, const int pad_h, const int pad_w, const int stride_h, const int stride_w, const int height_col, const int width_col, __global T* data_im, const int img_offset) { data_col = data_col + col_offset; data_im = data_im + img_offset; int index = get_global_id(0); if(index < n) { T val = 0; int w = index % width + pad_w; int h = (index / width) % height + pad_h; int c = index / (width * height); // compute the start and end of the output int w_col_start = (w < patch_w) ? 0 : (w - patch_w) / stride_w + 1; int w_col_end = min(w / stride_w + 1, width_col); int h_col_start = (h < patch_h) ? 0 : (h - patch_h) / stride_h + 1; int h_col_end = min(h / stride_h + 1, height_col); // equivalent implementation int offset = (c * patch_h * patch_w + h * patch_w + w) * height_col * width_col; int coeff_h_col = (1 - stride_h * patch_w * height_col) * width_col; int coeff_w_col = (1 - stride_w * height_col * width_col); for (int h_col = h_col_start; h_col < h_col_end; ++h_col) { for (int w_col = w_col_start; w_col < w_col_end; ++w_col) { val += data_col[offset + h_col * coeff_h_col + w_col * coeff_w_col]; } } data_im[index] = val; } }