row_2 = working_increment*1 + out_row_1; out_row_3 = out_working_increment*2 + out_row_1; out_row_4 = working_increment*3 + row_1; row_4 = working_increment*3 + row_1; // special: the right-hand side tries to squeeze 6 rows into the space of 5 out_working_increment = working_increment.