SL_WIDTH
#define SKIP_NEXT_LINE(addr) (addr += (PL_WIDTH - SL_WIDTH))
for (j = 0; j < SL_WIDTH; j++)
for (j = 0; j < SL_WIDTH; j++) {
lp += (PL_WIDTH - SL_WIDTH);
lq += (PL_WIDTH - SL_WIDTH);
for (j = 0; j < SL_WIDTH; j++) {
lq += (PL_WIDTH - SL_WIDTH);