专用指令集处理器模型的研究  

Modeling for application specific instruction set processor

作　　者：余洁[1] 王志刚[1] 周学海[1] 李曦[1] 

机构地区：[1]中国科学技术大学计算机科学技术系

出　　处：《哈尔滨工业大学学报》2008年第7期1125-1130,共6页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(60273042)

摘　　要：针对现有专用指令集处理器(ASIP)模型的不足和ASIP的特点,提出了一个新型的ASIP模型——xpMODEL.它以指令行为作为设计核心,引入指令行为有限状态机IB-EFSM建立指令操作的时序调度机制,通过原语操作完成行为中对处理器资源的调用,有效地对指令的流水化操作进行了建模.在对处理器资源的建模中,利用资源库描述处理器的部件、存储和连接,并通过抽象层和行为层的部件双层建模形式有效地支持了对ASIP中专用硬件和外围部件的描述.介绍了xpMODEL对一些复杂执行机制,如forwarding技术、动态调度技术、分支预测技术和中断技术建模的支持,说明了其建模能力相对于现有的ASIP模型的优势.Aiming at the shortcomings of existed models and the features of ASIP, this paper presents a novel ASIP model, xpMODEL. It takes the instruction behavior as the core of design and introduces the extended finite state machine for instruction behavior to model the instruction operation on cycle-level, with a meta-operator modeling calls of resources in the instruction operation. It uses the resource library to describe the units, storage and connection of processor, and applies the double-level mechanism to model the execution unit, thus supports the description of specific hardware and peripherals. Moreover, the ability to model complex mechanisms, such as forwarding technique, dynamic scheduling, branch prediction and interruption technique, is introduced. It demonstrates that xpMODEL is superior to other ASIP models in modeling capacity.

关 键 词：专用指令集处理器 xpMODEL 指令行为有限状态机 

分 类 号：TP302.1[自动化与计算机技术—计算机系统结构]