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1、第三章作业答案3.1寻址方式有效地址（EA）(1)立即寻址无(2)直接寻址7237H(3)BX寄存器寻址无(4)BX寄存器间接寻址637DH(5)BX寄存器相对寻址0D5B4H(6)基址变址寻址8E18H(7)相对基址变址寻址004FH3.2(1)ADDDX,BX⑵ADDAL,[BX][SI]⑶ADD[BX+OB2H],CX⑷ADDWORDPTR[0524HJ,2A59HADDAL,0B5H3.3(1)LEABX,BLOCK+(6-l)*2MOVDX,[BX]⑵LEABX,BLOCKMOVDX,[BX+10]⑶MOVS
2、I,10LEABX,BLOCKMOVDX,[BX][SI]3.4(1)1200H⑵()1OOH⑶4C2AH⑷3412H(5)4C2AH⑹7856H(7)65B7H3.5⑴EA=(IP)+D=7CD9H⑵物理地址=16XDS+(BX)=224A0HIP=0600H⑶物理地址二16XDS+(BX)+D=275B9HIP=098AH3.6MOVBX,2000HLDSSI,[BX]MOVAX,[SIJ3.7(1)0626H+27H=064DH(2)0626H+6BH=0691H(3)0626H+0FFC6H=05ECH（注意符
3、号扩展）寻址方式(1)立即数寻址(2)寄存器寻址(3)直接寻址(4)直接寻址(5)寄存器间接寻址(6)寄存器间接寻址(7)寄存器间接寻址(8)寄存器间接寻址(9)寄存器相对寻址(10)寄存器相对寻址(11)基址变址寻址(12)相对基址变址寻址3.9(1)MOVAX,[BX+12]MOVZERO,AX⑵MOVAX,ARRAY[BX]MOVZERO,AX3.10(1)1234H⑵0032H3.113.81E00H物理地址无无20100H20050H20100H21100H15010H200A0H20000H+0100H+0
4、AH20150H201A0H201F0H201()AHAXk3.13OFFAAEHOFFAAFH（1）初始(2)8O57H入栈(3)0F79H入栈(4)0F79H出栈3.15SFZFCFOF62A0H+1234H74D4H000062A0H+4321H62A0H+CFA0H62A0H+9D60HA5C1H3240H(l)OOOOH1000010111003.17(1)MOVAX,ZSUBAX,XADDAX,WMOVZ,AX(2)ADDX,6ADDR,9MOVAX,WSUBAX,XSUBAX,RMOVZ,AX(3)MOV
5、AX,WIMULXADDY,6MOVBX,YIDIVBXMOVZ,AXMOVR,DX(4)MOVBX,WSUBBX,X;(BX)=W-XMOVAX,YMOVCX,5IMULex;(DX,AX)=YX5MOVCXAXMOVAX,BX；BX扩展到EAX（32位）CWD；被除数扩展到64位IDIVCX；除数Y限制为字（16位）SALAX,1MOVZ,AX；可以认为AX能存储下结果3.19程序AXCFSFZFOFMOVAX,00000H————DECAXFFFFH-—101ADDAX,7FFFH7FFFH1000ADDAX,2
6、8000H0101NOTAX7FFFH0101SUBAX,OFFFFH8000H1101ADDAX,8000H0000H1011SUBAX,1FFFFH1100ANDAX,58D1H58D1H0000SACAX,1B1A2H0101SARAX,1D8D1H0100NEGAX272FH1000RORAX,19397H11013.21NOTAXNOTDXADDAX,1ADCDX,03.23(1)BX=009AH(2)BX=0061H(3)BX=()()FBH(4)BX=O()1CH(5)BX=0()00H(6)BX=0()
7、01H(2)-49X2MOVAL,CFH3.25(1)+53X2MOVAL,35HSALAL,1结果为6AH=106D(3)+5322MOVAL,35HSARAL,1SALAL,1结果为9EH=-98D(4)-494-2MOVAL,CFHSARAL,1结果为1AH=26D结果为E7H=-24D3.27(1)DX=OOOO000001011100B⑵DX=0000000000010111B(3)DX=()000010111001000B(4)DX=000000000111001OB(5)DX=00010000000101
8、1IB(6)DX=0000000011001101B(7)DX=0000000010111001B(8)DX=()000010111001100B(9)DX=0000000011011100B3.29pll2(1)LEASI,CONAMELEADI,PRUNEMOVCX,20CLDREPMOVSB(2)LEASI,C0NAME+1
