汇编子程序设计.doc

实验五子程序设计【实验目的】掌握一般子程序的调用和返回方法,掌握定义过程的伪指令的用法。【实验性质】设计性实验(学时数:3H)【实验内容】1、完成两个四位十进制数相加的程序设计,形式为:2345+7869=10214(1)要求所有中断调用全部采用子程序的形式完成。(2)要求考虑进位位。完善程序并调试通过。流程图程序源代码:.   DD0ARRAY  DD16DUP(0)ERR   DB0DH,0AH,'Inputerror!',0DH,0AH,'$'STRING  DB0AH,0DH,0AH,0DH,'PleaseInput(*B=)$'STRIN  DB0AH,0DH,0AH,0DH,'("q"quit):',0DH,0AH,'$'DATAENDSCODESEGMENTASSUMECS:CODE,DS:DATASTART:MOVAX,DATAMOVDS,AXAGAIN:LEADX,STRING       MOVAH,9INT21HLEADX,STRINMOVAH,9INT21HMOVEBX,OFFSETARRAYMOVFLAG_SIGN,0     MOVFLAG_NUM1,0      MOVFLAG_NUM2,0      L_Input0:XOREDX,EDXXORECX,ECXXOREAX,EAXMOVAH,1         INT21HCMPAL,'+'JZ L_Input1CMPAL,'-'JNZL_NumberNOTFLAG_SIGN            L_Input1:MOVAH,1INT21HL_Number:CMPAL,'0'JB L_OperatorCMPAL,'9'JA L_OperatorSUBAL,30H       ADDEDX,EDXMOVECX,EDXADDECX,ECXADDECX,ECXADDEDX,ECXMOVAH,0ADDEDX,EAXMOVFLAG_NUM1,1       JMPL_Input1         L_Operator:CMPAL,'*'JNZL_EqualCMPFLAG_NUM1,0       JZ ERMOV[BX],EDX        ADDBX,4 MOVFLAG_NUM1,0      MOVFLAG_NUM2,1      JMPL_Input0        L_Equal:MOV[BX],EDX        CMPAL,'='JNZL_Quit1MOVBL,FLAG_NUM1      MOVCL,FLAG_NUM2CMPBL,CLJNZERCMPFLAG_SIGN,0     JZ L_Cal    MOVDL,'-'        MOVAH,2INT21HL_Cal:MOVCX,0MOVSI,CXMOVEAX,ARRAY[SI+4]      MOVEBX,ARRAY[SI]       MULEBX            MOVEBX,1000000000      DIVEBX           MOVTEMP,EAX         CALLBINTOASCII        MOVTEMP,EDX          CMPTEMP,0            JZ Show_0CALL BINTOASCII       JMPAGAIN            Show_0:MOVCX,9             Display:MOVDL,'0'MOVAH,XCMPCX,0JNZDisplayJMPAGAIN           L_Quit1:CMPAL,'Q'           JNZL_Quit2JMPL_QuitL_Quit2:CMPAL,'q'JNZERJMPL_QuitER:      MOVDX,OFFSETERR    MOVAH,9INT21HJMPAGAINL_Quit:MOVAH,4CHINT21HBINTOASCIIPROCPUSHEAX                PUSHEBXPUSHECXPUSHEDXMOVEAX,TEMP         MOVEBX,10PUSHBX           B3:CMPEAX,0          JZB4SUBEDX,EDX         DIVEBX           ADDDL,30H                PUSHDX                   JMPB3B4:POPDX