发布时间:2025-12-10 19:43:42 浏览次数:7
两个半加器组成一个全加器_并行进位加法器[通俗易懂]一、半加器和全加器二、行波进位加法器三、超前进位加法器(Carry-LookaheadAdder,CLA)https://www.jianshu.com/p/6ce9cad8b467_cla、csa
一、半加器和全加器
二、行波进位加法器
三、超前进位加法器(Carry-Lookahead Adder,CLA)
https://www.jianshu.com/p/6ce9cad8b467
四、流水线加法器
源文件:
`timescale 1ns / 1psmodule adder_pipeline2(input clk,input [7:0]a,input [7:0]b,input cin,output reg[7:0]sum,output reg cout ); reg [3:0]tem_a;reg [3:0]tem_b;reg [3:0]sum1;reg cout1;always@(posedge clk)//第一级流水线 begin{cout1,sum1}<=a[3:0]+b[3:0]+cin;endalways@(posedge clk)//将输入寄存一拍 begintem_a<=a[7:4];tem_b<=b[7:4];endalways@(posedge clk)//第二级流水线{cout,sum}<={ {1'b0,tem_a}+{1'b0,tem_b}+cout1,sum1};endmodule希望我今天分享的这篇文章可以帮到您。
测试文件:
`timescale 1ns / 1psmodule tb_adder2pipeline;reg clk;reg [7:0]a;reg [7:0]b;reg cin;wire [7:0]sum;wire cout;initialclk=0;always #10clk=~clk;always@(posedge clk)begina<={$random}%255;b<=2+{$random}%250;cin<={$random}%2;endadder_pipeline2 u_adder(.clk(clk),.a(a),.b(b),.cin(cin),.cout(cout),.sum(sum));endmodule仿真波形:
两级流水线,加法器的和延迟两个周期输出结果。