|
__kernel void im2col_pad(__global float *im, int batch,
|
int channels, int height, int width,
|
int ksize, int stride, __global float *data_col)
|
{
|
int c,h,w,b;
|
int height_col = 1 + (height-1) / stride;
|
int width_col = 1 + (width-1) / stride;
|
int channels_col = channels * ksize * ksize;
|
|
int pad = ksize/2;
|
|
int id = get_global_id(0);
|
int col_index = id;
|
w = id % width_col;
|
id /= width_col;
|
h = id % height_col;
|
id /= height_col;
|
c = id % channels_col;
|
id /= channels_col;
|
b = id % batch;
|
id /= batch;
|
|
int col_size = height_col*width_col*channels_col;
|
int w_offset = c % ksize;
|
int h_offset = (c / ksize) % ksize;
|
int im_channel = c / ksize / ksize;
|
int im_row = h_offset + h * stride - pad;
|
int im_col = w_offset + w * stride - pad;
|
|
int im_index = im_col + width*(im_row + height*(im_channel+b*channels));
|
float val = (im_row < 0 || im_col < 0 || im_row >= height || im_col >= width) ? 0 : im[im_index];
|
|
data_col[col_index] = val;
|
}
|
|
__kernel void im2col_nopad(__global float *im, int batch,
|
int channels, int height, int width,
|
int ksize, int stride, __global float *data_col)
|
{
|
int c,h,w,b;
|
int height_col = (height - ksize) / stride + 1;
|
int width_col = (width - ksize) / stride + 1;
|
int channels_col = channels * ksize * ksize;
|
|
int id = get_global_id(0);
|
int col_index = id;
|
w = id % width_col;
|
id /= width_col;
|
h = id % height_col;
|
id /= height_col;
|
c = id % channels_col;
|
id /= channels_col;
|
b = id % batch;
|
id /= batch;
|
|
int col_size = height_col*width_col*channels_col;
|
int w_offset = c % ksize;
|
int h_offset = (c / ksize) % ksize;
|
int im_channel = c / ksize / ksize;
|
int im_row = h_offset + h * stride;
|
int im_col = w_offset + w * stride;
|
|
int im_index = im_col + width*(im_row + height*(im_channel+b*channels));
|
float val = (im_row < 0 || im_col < 0 || im_row >= height || im_col >= width) ? 0 : im[im_index];
|
|
data_col[col_index] = val;
|
}
|
