汇编语言中的条件指令有哪些 汇编中的常见指令有哪些
\u6c47\u7f16\u4e2d\u5e38\u7528\u7684\u5224\u65ad\u6761\u4ef6\u8bed\u53e5\u7684\u6307\u4ee4\u6709\u54ea\u4e9b\uff1f\u6761\u4ef6\u8f6c\u79fb\u6307\u4ee4\u5206\u4e09\u5927\u7c7b\uff1a\u57fa\u4e8e\u65e0\u7b26\u53f7\u6570\u7684\u6761\u4ef6\u8f6c\u79fb\u6307\u4ee4\u3001\u57fa\u4e8e\u6709\u7b26\u53f7\u6570\u7684\u6761\u4ef6\u8f6c\u79fb\u6307\u4ee4\u548c\u57fa\u4e8e\u7279\u6b8a\u7b97\u672f\u6807\u5fd7\u4f4d\u7684\u6761\u4ef6\u8f6c\u79fb\u6307\u4ee4\u3002
\u4e00\u3001\u65e0\u7b26\u53f7\u6570\u7684\u6761\u4ef6\u8f6c\u79fb\u6307\u4ee4(Jumps
Based
on
Unsigned
(Logic)
Data)
\u6307\u4ee4\u7684\u52a9\u5fc6\u7b26
\u68c0\u6d4b\u7684\u8f6c\u79fb\u6761\u4ef6
\u529f\u80fd\u63cf\u8ff0
JE/JZ
ZF=1
Jump
Equal
or
Jump
Zero
JNE/JNZ
ZF=0
Jump
Not
Equal
or
Jump
Not
Zero
JA/JNBE
CF=0
and
ZF=0
Jump
Above
or
Jump
Not
Below
or
Equal
JAE/JNB
CF=0
Jump
Above
or
Equal
or
Jump
Not
Below
JB/JNAE
CF=1
Jump
Below
or
Jump
Not
Above
or
Equal
JBE/JNA
CF=1
or
AF=1
Jump
Below
or
Equal
or
Jump
Not
Above
\u4e8c\u3001\u6709\u7b26\u53f7\u6570\u7684\u6761\u4ef6\u8f6c\u79fb\u6307\u4ee4(Jumps
Based
on
Signed
(Arithmetic)
Data)
\u6307\u4ee4\u7684\u52a9\u5fc6\u7b26
\u68c0\u6d4b\u7684\u8f6c\u79fb\u6761\u4ef6
\u529f\u80fd\u63cf\u8ff0
JE/JZ
ZF=1
Jump
Equal
or
Jump
Zero
JNE/JNZ
ZF=0
Jump
Not
Equal
or
Jump
Not
Zero
JG/JNLE
ZF=0
and
SF=OF
Jump
Greater
or
Jump
Not
Less
or
Equal
JGE/JNL
SF=OF
Jump
Greater
or
Equal
or
Jump
Not
Less
JL/JNGE
SF\u2260OF
Jump
Less
or
Jump
Not
Greater
or
Equal
JLE/JNG
ZF=1
or
SF\u2260OF
Jump
Less
or
Equal
or
Jump
Not
Greater
\u4e09\u3001\u7279\u6b8a\u7b97\u672f\u6807\u5fd7\u4f4d\u7684\u6761\u4ef6\u8f6c\u79fb\u6307\u4ee4(Jumps
Based
on
Special
Arithmetic
Tests)
\u6307\u4ee4\u7684\u52a9\u5fc6\u7b26
\u68c0\u6d4b\u7684\u8f6c\u79fb\u6761\u4ef6
\u529f\u80fd\u63cf\u8ff0
JC
CF=1
Jump
Carry
JNC
CF=0
Jump
Not
Carry
JO
OF=1
Jump
Overflow
JNO
OF=0
Jump
Not
Overflow
JP/JPE
PF=1
Jump
Parity
or
Jump
Parity
Even
JNP/JPO
PF=0
Jump
Not
Parity
or
Jump
Parity
Odd
JS
SF=1
Jump
Sign
(negative)
JNS
SF=0
Jump
No
Sign
(positive)
je/jz zf=1 若相等或为零则转移
jne/jnz zf=0 若不相等或不为零则转移
ja/jnbe cf=0 and zf=0 若高于或不低于等于则转移
jae/jnb cf=0 若大于等于或不低于则转移
jb/jnae cf=1 and zf=0 若小于或不大于等于则转移
jbe/jna cf=1 若小于等于或不大于则转移
有符号数条件转移指令
je/jz zf=1 若相等或为零则转移
jne/jnz zf=0 若不相等或不为零则转移
jg/jnle sf=of and zf=0 若大于或不小于等于则转移
jge/jnl sf=of 若大于等于或不小于则转移
jl/jnge sf！=of 若小于或不大于等于则转移
jle/jng sf！=of or zf=1 若小于等于或不大于则转移
特殊算数标志位的条件转移指令
jc cf=1 若有进位则转移
jnc cf=0 若无进位则转移
jo of=1 若有溢出则转移
jno of=0 若无溢出则转移
jp/jpe pf=1 若有偶数个1 则转移
jnp/jpo pf=0 若有奇数个1 则转移
js sf=1 若为负数则转移
jns sf=0 若为正数则转移
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