MCDT_FIFO_LENGTH
return 4 * (MCDT_FIFO_LENGTH - w_addr + r_addr);
return 4 * (MCDT_FIFO_LENGTH - r_addr + w_addr);
MCDT_FIFO_LENGTH - 1);
MCDT_FIFO_LENGTH - 1, water_mark);
water_mark, MCDT_FIFO_LENGTH - 1);
MCDT_FIFO_LENGTH - 1, water_mark);