| | |
| | | |
| | | __kernel void im2col(__global float *data_im, const int im_offset, |
| | | const int channels, const int height, const int width, |
| | | const int ksize, const int stride, __global float *data_col, const int col_offset) |
| | | float im2col_get_pixel(__global float *im, int height, int width, int channels, |
| | | int batch, int row, int col, int channel, int pad) |
| | | { |
| | | int b = get_global_id(0); |
| | | int c = get_global_id(1); |
| | | row -= pad; |
| | | col -= pad; |
| | | |
| | | int h = get_local_id(0); |
| | | int w = get_local_id(1); |
| | | if (row < 0 || col < 0 || row >= height || col >= width) return 0; |
| | | int index = col + width*(row + height*(channel+batch*channels)); |
| | | return im[index]; |
| | | } |
| | | |
| | | __kernel void im2col(__global float *data_im, int batch, |
| | | int channels, int height, int width, |
| | | int ksize, int stride, int pad, __global float *data_col) |
| | | { |
| | | int c,h,w,b; |
| | | int height_col = (height - ksize) / stride + 1; |
| | | int width_col = (width - ksize) / stride + 1; |
| | | if (pad){ |
| | | height_col = 1 + (height-1) / stride; |
| | | width_col = 1 + (width-1) / stride; |
| | | pad = ksize/2; |
| | | } |
| | | int gid1 = get_global_id(0); |
| | | b = gid1%batch; |
| | | c = gid1/batch; |
| | | |
| | | int gid2 = get_global_id(1); |
| | | h = gid2%height_col; |
| | | w = gid2/height_col; |
| | | |
| | | |
| | | int channels_col = channels * ksize * ksize; |
| | | |
| | | int im_offset = height*width*channels*b; |
| | | int col_offset = height_col*width_col*channels_col*b; |
| | | |
| | | int col_size = height_col*width_col*channels_col; |
| | | int w_offset = c % ksize; |
| | | int h_offset = (c / ksize) % ksize; |
| | | int c_im = c / ksize / ksize; |
| | | |
| | | data_col[(c * height_col + h) * width_col + w + col_offset] = |
| | | data_im[(c_im * height + h * stride + h_offset) * width |
| | | + w * stride + w_offset + im_offset]; |
| | | int im_row = h_offset + h * stride; |
| | | int im_col = w_offset + w * stride; |
| | | int col_index = (c * height_col + h) * width_col + w + b*col_size; |
| | | data_col[col_index] = im2col_get_pixel(data_im, height, width, channels, b, im_row, im_col, c_im, pad); |
| | | } |