![](http://datasheet.mmic.net.cn/330000/LD8088-2_datasheet_16422711/LD8088-2_27.png)
8088
8086/8088 Instruction Set Summary
(Continued)
Mnemonic and
Description
Instruction Code
ARITHMETIC
ADD
e
Add:
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
Reg./Memory with Register to Either
0 0 0 0 0 0 d w
mod reg r/m
Immediate to Register/Memory
1 0 0 0 0 0 s w
mod 0 0 0 r/m
data
data if s:w
e
01
Immediate to Accumulator
0 0 0 0 0 1 0 w
data
data if w
e
1
ADC
e
Add with Carry:
Reg./Memory with Register to Either
0 0 0 1 0 0 d w
mod reg r/m
Immediate to Register/Memory
1 0 0 0 0 0 s w
mod 0 1 0 r/m
data
data if s:w
e
01
Immediate to Accumulator
0 0 0 1 0 1 0 w
data
data if w
e
1
INC
e
Increment:
Register/Memory
1 1 1 1 1 1 1 w
mod 0 0 0 r/m
Register
0 1 0 0 0 reg
AAA
e
ASCII Adjust for Add
0 0 1 1 0 1 1 1
BAA
e
Decimal Adjust for Add
0 0 1 0 0 1 1 1
SUB
e
Subtract:
Reg./Memory and Register to Either
0 0 1 0 1 0 d w
mod reg r/m
Immediate from Register/Memory
1 0 0 0 0 0 s w
mod 1 0 1 r/m
data
data if s:w
e
01
Immediate from Accumulator
0 0 1 0 1 1 0 w
data
data if w
e
1
SSB
e
Subtract with Borrow
Reg./Memory and Register to Either
0 0 0 1 1 0 d w
mod reg r/m
Immediate from Register/Memory
1 0 0 0 0 0 s w
mod 0 1 1 r/m
data
data if s:w
e
01
Immediate from Accumulator
0 0 0 1 1 1 w
data
data if w
e
1
DEC
e
Decrement:
Register/memory
1 1 1 1 1 1 1 w
mod 0 0 1 r/m
Register
0 1 0 0 1 reg
NEG
e
Change sign
1 1 1 1 0 1 1 w
mod 0 1 1 r/m
CMP
e
Compare:
Register/Memory and Register
0 0 1 1 1 0 d w
mod reg r/m
Immediate with Register/Memory
1 0 0 0 0 0 s w
mod 1 1 1 r/m
data
data if s:w
e
01
Immediate with Accumulator
0 0 1 1 1 1 0 w
data
data if w
e
1
AAS
e
ASCII Adjust for Subtract
0 0 1 1 1 1 1 1
DAS
e
Decimal Adjust for Subtract
0 0 1 0 1 1 1 1
MUL
e
Multiply (Unsigned)
1 1 1 1 0 1 1 w
mod 1 0 0 r/m
IMUL
e
Integer Multiply (Signed)
1 1 1 1 0 1 1 w
mod 1 0 1 r/m
AAM
e
ASCII Adjust for Multiply
1 1 0 1 0 1 0 0
0 0 0 0 1 0 1 0
DIV
e
Divide (Unsigned)
1 1 1 1 0 1 1 w
mod 1 1 0 r/m
IDIV
e
Integer Divide (Signed)
1 1 1 1 0 1 1 w
mod 1 1 1 r/m
AAD
e
ASCII Adjust for Divide
1 1 0 1 0 1 0 1
0 0 0 0 1 0 1 0
CBW
e
Convert Byte to Word
1 0 0 1 1 0 0 0
CWD
e
Convert Word to Double Word
1 0 0 1 1 0 0 1
27