8086-2 datasheet(28/30 Pages) INTEL

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8086

Table 2. Instruction Set Summary

(Continued)

Mnemonic and

Instruction Code

Description

LOGIC

76543210

NOT

e Invert

1 1 1 1 0 1 1 w

mod 0 1 0 r/m

SHL/SAL

e Shift Logical/Arithmetic Left

1 1 0 1 0 0 v w

mod 1 0 0 r/m

SHR

e Shift Logical Right

1 1 0 1 0 0 v w

mod 1 0 1 r/m

SAR

e Shift Arithmetic Right

1 1 0 1 0 0 v w

mod 1 1 1 r/m

ROL

e Rotate Left

1 1 0 1 0 0 v w

mod 0 0 0 r/m

ROR

e Rotate Right

1 1 0 1 0 0 v w

mod 0 0 1 r/m

RCL

e Rotate Through Carry Flag Left

1 1 0 1 0 0 v w

mod 0 1 0 r/m

RCR

e Rotate Through Carry Right

1 1 0 1 0 0 v w

mod 0 1 1 r/m

AND

e And:

Reg./Memory and Register to Either

0 0 1 0 0 0 d w

mod reg r/m

Immediate to Register/Memory

1 0 0 0 0 0 0 w

mod 1 0 0 r/m

data

data if w

e 1

Immediate to Accumulator

0010010w

data

data if w

e 1

TEST

e And Function to Flags, No Result:

1 0 0 0 0 1 0 w

mod reg r/m

Immediate Data and Register/Memory

1 1 1 1 0 1 1 w

mod 0 0 0 r/m

data

data if w

e 1

Immediate Data and Accumulator

1010100w

data

data if w

e 1

e Or:

Reg./Memory and Register to Either

0 0 0 0 1 0 d w

mod reg r/m

Immediate to Register/Memory

1 0 0 0 0 0 0 w

mod 0 0 1 r/m

data

data if w

e 1

Immediate to Accumulator

0000110w

data

data if w

e 1

XOR

e Exclusive or:

Reg./Memory and Register to Either

0 0 1 1 0 0 d w

mod reg r/m

Immediate to Register/Memory

1 0 0 0 0 0 0 w

mod 1 1 0 r/m

data

data if w

e 1

Immediate to Accumulator

0011010w

data

data if w

e 1

STRING MANIPULATION

REP

e Repeat

1111001z

MOVS

e Move Byte/Word

1010010w

CMPS

e Compare Byte/Word

1010011w

SCAS

e Scan Byte/Word

1010111w

LODS

e Load Byte/Wd to AL/AX

1010110w

STOS

e Stor Byte/Wd from AL/A

1010101w

CONTROL TRANSFER

CALL

e Call:

Direct within Segment

11101000

disp-low

disp-high

Indirect within Segment

1 1 1 1 1 1 1 1

mod 0 1 0 r/m

Direct Intersegment

10011010

offset-low

offset-high

seg-low

seg-high

Indirect Intersegment

1 1 1 1 1 1 1 1

mod 0 1 1 r/m

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