High performance requires the register files have short access latency, while embedded application focuses on running power and standby power. Superscalar CPUs need the register files have multiple read and write ports. 高性能要求寄存器文件具有小的访问延时,而嵌入式应用更关注工作功耗和待机功耗,超标量处理器则要求寄存器具有多个读写端口。