Instruction decode , scheduling , dispatch , and retirement functionality is contained within this region 指令解碼,分時,分布和退回功能就在此區(qū)。
Jx5 is a complex microprocessor , which contains cache , microcode rom , instruction prefetch unit , instruction decode unit , integer unit , mmx unit , floating point unit , page unit , bus unit , dp logic , apic and so on . it is very difficulty to test a such complicated microprocessor and receive anticipative fault coverage ratio . so , we must add dft in cpu ’ design Jx5微處理器是一款結(jié)構(gòu)異常復(fù)雜的微處理器,它的內(nèi)部包含有: cache 、微碼rom 、指令預(yù)取部件和動態(tài)分支預(yù)測部件、指令譯碼部件、整數(shù)部件、多媒體部件、浮點部件、分段和分頁部件、總線接口部件、雙處理器接口部件、可編程中斷控制部件等。
Each unit is extracted from the circuit , and is analyzed detailedly in framework , configuration and design approach . the instruction system of c9821 is unscrambled and then the instruction decode algorithm are obtained . the complete program of c9821 including basic arithmetic and root square operation is realized 在軟件方面,破譯了c9821的指令系統(tǒng),分析了指令譯碼電路的設(shè)計技術(shù),分析了計算器內(nèi)bcd碼的四則運算及開方運算算法,得到了實現(xiàn)c9821全部功能的程序,掌握了該計算器的程序設(shè)計方法。