Hadd

Fadd(全加器)

Adder3

Exams/m2014 q4j

Exams/ece241 2014 q1c

Adder100

Bcdadd4

https://zhuanlan.zhihu.com/p/60262770

https://blog.csdn.net/Decade0820/article/details/106384719?spm=1001.2014.3001.5501