标志寄存器及汇编指令英文对照

1 标志寄存器

序号	标志位	英文	中文
1	CF	Carry Flag	进位标志
2	PF	Parity Flag	奇偶标志
3	AF	Auxiliary Carry Flag	辅助进位标志
4	ZF	Zero Flag	零标志
5	SF	Sign Flag	符号标志
6	TF	Trap Flag	陷阱标志
7	IF	Interrupt-enable Flag	中断允许标志
8	DF	Direction Flag	方向标志
9	OF	Overflow Flag	溢出标志

1. CF：无符号计算在最高位产生了进位或借位时，CF=1；反之，CF=0
2. PF：算术逻辑运算的结果中低8位“1”的个数为偶数个时，PF=1；为奇数时，PF=0
3. AF：在运算过程中，第四位向第五位有进位或借位时，AF=1；反之，AF=0
4. ZF：当运算结果全零时，ZF=1；反之，ZF=0
5. SF：当运算结果为正数，即结果的最高位为0时，SF=0；反之，即结果的最高位为1时，SF=1
6. TF：当TF=1时，CPU进入单步工作方式；当TF=0时，正常执行程序
7. IF：当IF=1时，CPU可以响应外部可屏蔽中断请求；当IF=0时，CPU不响应外部可屏蔽中断请求。但IF对不可屏蔽中断或内部中断没有影响
8. DF：当DF=0时，以地址增量的顺序处理数据串；当DF=1时，以地址减量的顺序处理数据串
9. OF：带符号数运算结果超出了补码所能表示的范围，OF=1；反之，OF=0。OF=最高位进位与次高位进位的异或

2 汇编指令

助记符	英文
MOV	Move
XCHG	Exchange
PUSH	Push
PUSHF	Push Flags
POP	Pop
POPF	Pop Flags
LEA	Load Effective Address
LDS	Load pointer using DS
LES	Load pointer using ES
IN	In
OUT	Out
XLAT	Translate
LAHF	Load AH from Flags
SAHF	Store AH into Flags
ADD	Add
ADC	Add with Carry
INC	Increment
SUB	Subtract
SBB	Subtract with Borrow
DEC	Decrement
NEG	Negate
CMP	Compare
MUL	Multiplication
IMUL	Integer Multiplication
DIV	Division
IDIV	Integer Division
CBW	Convert Byte to Word
CWD	Convert Word to Double Word
DAA	Decimal Adjust for Addition
DAS	Decimal Adjust for Subtraction
AAA	ASCII Adjust for Addition
AAS	ASCII Adjust for Subtraction
AAM	ASCII Adjust for Multiplication
AAD	ASCII Adjust for Division
SHL	Shift Logic Left
SAL	Shift Arithmetic Left
SHR	Shift Logic Right
SAR	Shift Arithmetic Right
ROL	Rotate Left
ROR	Rotate Right
RCL	Rotate through CF Left
RCR	Rotate through CF Right
AND	And
OR	Or
NOT	Not
XOR	Exclusive OR
TEST	Test
MOVSB/MOVSW	Move String Byte/Word
CMPSB/CMPSW	Compare String Byte/Word
SCASB/SCASW	Scan String Byte/Word
LODSB/LODSW	Load String Byte/Word
STOSB/STOSW	Store String Byte/Word
JMP	Jump
JZ/JNZ	Jump on (Not) Zero
JS/JNS	Jump on (Not) Sign
JO/JNO	Jump on (Not) Overflow
JP/JNP	Jump on (Not) Parity
JC/JNC	Jump on (Not) Carry
JCXZ	Jump if CX register is Zero
JA	Jump Above
JNBE	Jump on Not Below or Equal
JAE	Jump on Above or Equal
JNB	Jump on Not Below
JNC	Jump on Not Carry
JB	Jump on Below
JNAE	Jump on Not Above or Equal
JC	Jump on Carry
JBE	Jump on Below or Equal
JNA	Jump on Not Above
JG	Jump on Greater
JNLE	Jump on Not Less or Equal
JGE	Jump on Greater or Equal
JNL	Jump on Not Less
JL	Jump on Less
JNGE	Jump on Not Greater or Equal
JLE	Jump on Less or Equal
JNG	Jump on Not Greater
CALL	Call
RET	Return
LOOP	Loop
CLC	Clear Carry Flag
STC	Set Carry Flag
CMC	Complement Carry Flag
CLD	Clear Direction Flag
STD	Set Direction Flag
CLI	Clear Interrupt Flag
STI	Set Interrupt Flag