📄 汇编语言指令集(二)_一起来分享彼此的喜悦，笑看人生！！！.htm
字号:
奇偶性为偶数时转移.<BR>JS 符号位为 "1"
时转移.<BR> 3>循环控制指令(短转移)<BR>LOOP
CX不为零时循环.<BR>LOOPE/LOOPZ CX不为零且标志Z=1时循环.<BR>LOOPNE/LOOPNZ
CX不为零且标志Z=0时循环.<BR>JCXZ CX为零时转移.<BR>JECXZ
ECX为零时转移.<BR>
4>中断指令<BR>INT 中断指令<BR>INTO
溢出中断<BR>IRET 中断返回<BR>
5>处理器控制指令<BR>HLT 处理器暂停,
直到出现中断或复位信号才继续.<BR>WAIT
当芯片引线TEST为高电平时使CPU进入等待状态.<BR>ESC
转换到外处理器.<BR>LOCK 封锁总线.<BR>NOP
空操作.<BR>STC
置进位标志位.<BR>CLC
清进位标志位.<BR>CMC
进位标志取反.<BR>STD (SeT Direction
flag)置方向标志位.<BR>CLD (CLear Direction
flag)清方向标志位.<BR>STI
置中断允许位.<BR>CLI 清中断允许位.</FONT></P>
<P><FONT color=#0000ff size=4><FONT
color=#ff00ff>六、伪指令</FONT><BR>───────────────────────────────────────<BR> DW
定义字(2字节).<BR>PROC
定义过程.<BR>ENDP 过程结束.<BR>SEGMENT
定义段.<BR>ASSUME 建立段寄存器寻址.<BR>ENDS
段结束.<BR>END 程序结束.</FONT></P>
<P><FONT color=#0000ff size=4>8088 汇编跳转 <BR>cmp a,b 比较a与b <BR>mov a,b
把b的值送给a <BR>ret 返回主程序 <BR>nop 无作用,英文“no operation”的简写，意思是“do nothing”
<BR>call 调用子程序 <BR>je 或jz 若相等则跳 <BR>jne或jnz 若不相等则跳 <BR>jmp 无条件跳 <BR>jb
若小于则跳 <BR>ja 若大于则跳 <BR>jg 若大于则跳 <BR>jge 若大于等于则跳 <BR>jl 若小于则跳 <BR>jle
若小于等于则跳 <BR>pop 出栈 <BR>push 压栈 </FONT><FONT color=#0000ff
size=4><BR></FONT><FONT color=#0000ff size=4></FONT></P>
<P></P>
<P><FONT color=#ff0000 size=4>用法功能：</FONT></P>
<P><FONT color=#0000ff size=4>MOV <BR>功能: 把源操作数送给目的操作数 <BR>语法: MOV
目的操作数,源操作数 <BR>格式: MOV r1,r2 <BR>MOV r,m <BR>MOV m,r <BR>MOV r,data
</FONT></P>
<P><FONT color=#0000ff size=4>XCHG <BR>功能: 交换两个操作数的数据 <BR>语法: XCHG <BR>格式:
XCHG r1,r2 XCHG m,r XCHG r,m </FONT></P>
<P><FONT color=#0000ff size=4>PUSH,POP <BR>功能: 把操作数压入或取出堆栈 <BR>语法: PUSH
操作数 POP 操作数 <BR>格式: PUSH r PUSH M PUSH data POP r POP m </FONT></P>
<P><FONT color=#0000ff size=4>PUSHF,POPF,PUSHA,POPA <BR>功能: 堆栈指令群 <BR>格式:
PUSHF POPF PUSHA POPA </FONT></P>
<P><FONT color=#0000ff size=4>LEA,LDS,LES <BR>功能: 取地址至寄存器 <BR>语法: LEA r,m
LDS r,m LES r,m </FONT></P>
<P><FONT color=#0000ff size=4>XLAT(XLATB) <BR>功能: 查表指令 <BR>语法: XLAT XLAT m
</FONT></P>
<P><BR><FONT color=#0000ff size=4><FONT color=#ff0000>算数运算指令</FONT>
</FONT></P>
<P><FONT color=#0000ff size=4>ADD,ADC <BR>功能: 加法指令 <BR>语法: ADD OP1,OP2 ADC
OP1,OP2 <BR>格式: ADD r1,r2 ADD r,m ADD m,r ADD r,data <BR>影响标志: C,P,A,Z,S,O
</FONT></P>
<P><FONT color=#0000ff size=4>SUB,SBB <BR>功能:减法指令 <BR>语法: SUB OP1,OP2 SBB
OP1,OP2 <BR>格式: SUB r1,r2 SUB r,m SUB m,r SUB r,data SUB m,data <BR>影响标志:
C,P,A,Z,S,O </FONT></P>
<P><FONT color=#0000ff size=4>INC,DEC <BR>功能: 把OP的值加一或减一 <BR>语法: INC OP
DEC OP <BR>格式: INC r/m DEC r/m <BR>影响标志: P,A,Z,S,O </FONT></P>
<P><FONT color=#0000ff size=4>NEG <BR>功能: 将OP的符号反相(取二进制补码) <BR>语法: NEG OP
<BR>格式: NEG r/m <BR>影响标志: C,P,A,Z,S,O </FONT></P>
<P><FONT color=#0000ff size=4>MUL,IMUL <BR>功能: 乘法指令 <BR>语法: MUL OP IMUL OP
<BR>格式: MUL r/m IMUL r/m <BR>影响标志: C,P,A,Z,S,O(仅IMUL会影响S标志) </FONT></P>
<P><FONT color=#0000ff size=4>DIV,IDIV <BR>功能:除法指令 <BR>语法: DIV OP IDIV OP
<BR>格式: DIV r/m IDIV r/m </FONT></P>
<P><FONT color=#0000ff size=4>CBW,CWD <BR>功能: 有符号数扩展指令 <BR>语法: CBW CWD
</FONT></P>
<P><FONT color=#0000ff size=4>AAA,AAS,AAM,AAD <BR>功能: 非压BCD码运算调整指令 <BR>语法:
AAA AAS AAM AAD <BR>影响标志: A,C(AAA,AAS) S,Z,P(AAM,AAD) </FONT></P>
<P><FONT color=#0000ff size=4>DAA,DAS <BR>功能: 压缩BCD码调整指令 <BR>语法: DAA DAS
<BR>影响标志: C,P,A,Z,S <BR></FONT></P>
<P><BR><FONT color=#0000ff size=4> <FONT color=#ff0000
size=5>
大家一起学习学习啊，觉得不错就顶一下啊！！！ ^_^
^_^
^_^</FONT></FONT></P></DIV></TD></TR></TBODY></TABLE><BR>
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