According to the desire of BTB's function, the paper realizes a pseudo-LRU replacement algorithm and two-bit bimodal algorithm. The circuit has advantages in its simple structure, and small space.

针对BTB部件的功能需要，采用了随机替换算法以及两位饱和计数器算法，并给出电路实现，其电路结构简单，占用面积小。