题解 | #4bit超前进位加法器电路#
4bit超前进位加法器电路
https://www.nowcoder.com/practice/4d5b6dc4bb2848039da2ee40f9738363
`timescale 1ns/1ns
module lca_4(
input [3:0] A_in ,
input [3:0] B_in ,
input C_1 ,
output wire CO ,
output wire [3:0] S
);
wire [3:0] P;
wire [3:0] G;
wire [4:0] C;
assign C[0] = C_1;
assign CO = C[4];
genvar i;
generate
for(i=0;i<4;i=i+1) begin
assign P[i] = A_in[i] ^ B_in[i];
assign G[i] = A_in[i] & B_in[i];
assign C[i+1] = G[i] | P[i] & C[i];
assign S[i] = P[i] ^ C[i];
end
endgenerate
endmodule
