题解 | #全加器#
全加器
https://www.nowcoder.com/practice/d04c046febb74e72949baee9aa99d958
`timescale 1ns/1ns
module add_half(
input A ,
input B ,
output wire S ,
output wire C
);
assign S = A ^ B;
assign C = A & B;
endmodule
/***************************************************************/
module add_full(
input A ,
input B ,
input Ci ,
output wire S ,
output wire Co
);
wire S_half1,C_half1;
wire S_half2,C_half2;
add_half inst0(
.A (A ) ,
.B (B ) ,
.S (S_half1 ) ,
.C (C_half1 )
);
add_half inst1(
.A (S_half1 ) ,
.B (Ci ) ,
.S (S_half2 ) ,
.C (C_half2 )
);
assign S = S_half2;
assign Co = C_half2 | C_half1;
endmodule
