autodecrement

When the memory is accessed,the unit can execute some micro-operation which is optimized for memory access such as autoincrement and autodecrement in parallel and also support circular queue.

提出一新型结构内存控制单元,此单元在完成访存操作同时,可并行执行访存优化微操作,如和减操作,且可实现对循环队列支持。