51单片机常用汇编语言助记符英文全称
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51单片机常用汇编语言助记符英文全称
(1)数据传送类指令(7种助记符)
MOV(英文为Move):对内部数据寄存器RAM和特殊功能寄存器SFR的数据进行传送;
MOVC(Move Code)读取程序存储器数据表格的数据传送;
MOVX (Move External RAM) 对外部RAM的数据传送;
XCH (Exchange) 字节交换;
XCHD (Exchange low-order Digit) 低半字节交换;
PUSH (Push onto Stack) 入栈;
POP (Pop from Stack) 出栈;
(2)算术运算类指令(8种助记符)
ADD(Addition) 加法;
ADDC(Add with Carry) 带进位加法;
SUBB(Subtract with Borrow) 带借位减法;
DA(Decimal Adjust) 十进制调整;
INC(Increment) 加1;DEC(Decrement) 减1;
MUL(Multiplication、Multiply) 乘法;
DIV(Division、Divide) 除法;
(3)逻辑运算类指令(10种助记符)
ANL(AND Logic) 逻辑与;
XRL(Exclusive-OR Logic) 逻辑异或;
CLR(Clear) 清零;CPL(Complement) 取反;
RL(Rotate left) 循环左移;
RLC(Rotate Left throught the Carry flag) 带进位循环左移;
RR(Rotate Right) 循环右移;
RRC (Rotate Right throught the Carry flag) 带进位循环右移;
SWAP (Swap) 低4位与高4位交换;
(4)控制转移类指令(17种助记符)
ACALL(Absolute subroutine Call)子程序绝对调用;
LCALL(Long subroutine Call)子程序长调用;
RET(Return from subroutine)子程序返回;
RETI(Return from Interruption)中断返回;
SJMP(Short Jump)短转移;LJMP长转移;
AJMP(Absolute Jump)绝对转移;
CJNE (Compare Jump if Not Equal)比较不相等则转移;
DJNZ (Decrement Jump if Not Zero)减1后不为0则转移;
JZ (Jump if Zero)结果为0则转移;
JNZ (Jump if Not Zero) 结果不为0则转移;
JC (Jump if the Carry flag is set)有进位则转移;
JNC (Jump if Not Carry)无进位则转移;
JB (Jump if the Bit is set)位为1则转移;
JNB (Jump if the Bit is Not set) 位为0则转移;
(3)JBC(Jump if the Bit is set and Clear the bit) 位为1则转移,并清除该位;
NOP (No Operation) 空操作;
(5)位操作指令(1种助记符)
SETB(Set Bit) 位 置1 。
1.通用数据传送指令.
MOV----> move
MOVSX---->extended move with sign data
MOVZX---->extended move with zero data
PUSH---->push POP---->pop
PUSHA---->push all
POPA---->pop all
PUSHAD---->push all data
POPAD---->pop all data
BSWAP---->byte swap
XCHG---->exchange
CMPXCHG---->compare and change
XADD---->exchange and add
XLAT---->translate
2.输入输出端口传送指令.
IN---->input
OUT---->output
3.目的地址传送指令.
LEA---->load effective address
LDS---->load DS
LES---->load ES
LFS---->load FS
LGS---->load GS
LSS---->load SS
4.标志传送指令.
LAHF---->load AH from flag
SAHF---->save AH to flag
PUSHF---->push flag POPF---->pop flag
PUSHD---->push dflag POPD---->pop dflag
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二、算术运算指令
ADD---->add
ADC---->add with carry
INC---->increase 1
AAA---->ascii add with adjust
DAA---->decimal add with adjust
SUB---->substract
SBB---->substract with borrow
DEC---->decrease 1
NEC---->negative
CMP---->compare
AAS---->ascii adjust on substract
DAS---->decimal adjust on substract
MUL---->multiplication
IMUL---->integer multiplication
AAM---->ascii adjust on multiplication
DIV---->divide
IDIV---->integer divide
AAD---->ascii adjust on divide
CBW---->change byte to word
CWD---->change word to double word
CWDE---->change word to double word with sign to EAX
CDQ---->change double word to quadrate word
三、逻辑运算指令
AND---->and
OR---->or
XOR---->xor
NOT---->not
TEST---->test
SHL---->shift left
SAL---->arithmatic shift left
SHR---->shift right
SAR---->arithmatic shift right
ROL---->rotate left
ROR---->rotate right
RCL---->rotate left with carry
RCR---->rotate right with carry
四、串指令
MOVS---->move string
CMPS---->compare string
SCAS---->scan string
LODS---->load string
STOS---->store string
REP---->repeat
REPE---->repeat when equal
REPZ---->repeat when zero flag
REPNE---->repeat when not equal
REPNZ---->repeat when zero flag
REPC---->repeat when carry flag
REPNC---->repeat when not carry flag
五、程序转移指令
1>无条件转移指令(长转移)
JMP---->jump
CALL---->call
RET---->return
RETF---->return far
2>条件转移指令(短转移,-128到+127的距离内)
JAE---->jump when above or equal
JNB---->jump when not below
JB---->jump when below
JNAE---->jump when not above or equal
JBE---->jump when below or equal
JNA---->jump when not above
JG---->jump when greater
JNLE---->jump when not less or equal
JGE---->jump when greater or equal
JNL---->jump when not less
JL---->jump when less
JNGE---->jump when not greater or equal
JLE---->jump when less or equal
JNG---->jump when not greater
JE---->jump when equal
JZ---->jump when has zero flag
JNE---->jump when not equal
JNZ---->jump when not has zero flag
JC---->jump when has carry flag
JNC---->jump when not has carry flag
JNO---->jump when not has overflow flag
JNP---->jump when not has parity flag
JPO---->jump when parity flag is odd
JNS---->jump when not has sign flag
JO---->jump when has overflow flag
JP---->jump when has parity flag
JPE---->jump when parity flag is even
JS---->jump when has sign flag
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3>循环控制指令(短转移)
LOOP---->loop
LOOPE---->loop equal
LOOPZ---->loop zero
LOOPNE---->loop not equal
LOOPNZ---->loop not zero
JCXZ---->jump when CX is zero
JECXZ---->jump when ECX is zero
4>中断指令
INT---->interrupt
INTO---->overflow interrupt
IRET---->interrupt return
5>处理器控制指令
HLT---->halt
WAIT---->wait
ESC---->escape
LOCK---->lock
NOP---->no operation
STC---->set carry
CLC---->clear carry
CMC---->carry make change
STD---->set direction
CLD---->clear direction
STI---->set interrupt
CLI---->clear interrupt
六、伪指令
DW---->define word
PROC---->procedure
ENDP---->end of procedure
SEGMENT---->segment
ASSUME---->assume
ENDS---->end segment(段, 节,片断)
END---->end