一位二进制全减器设计 源代码 ARCHITECTURE dataflow OF full_adder IS signal op:std_logic; BEGIN process begin op<=not y;end if; s <= x XOR op AFTER tpd; sum <= s XOR c_in AFTER tpd; c_out <= (x AND op) OR( s AND c_in) AFTER 2* tpd; END dataflow； 5
library ieee; use ieee.std_logic_1164.all; entity addt is port (ain,bin,cin :in std_logic; cout,sum :out std_logic); end entity addt; architecture fd1 of addt is component h_adder port(a,b: in std_logic; co,so:out std_logic); end component; componen
