XBT_DEBUG ("Copy a %ux%u submatrix from %ux%u(of %ux%u) to %ux%u (of %ux%u)",
lsize, rsize, lpos_src, rpos_src, src->lines, src->rows, lpos_dst, rpos_dst, dst->lines, dst->rows);
XBT_DEBUG ("Copy a %ux%u submatrix from %ux%u(of %ux%u) to %ux%u (of %ux%u)",
lsize, rsize, lpos_src, rpos_src, src->lines, src->rows, lpos_dst, rpos_dst, dst->lines, dst->rows);