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80386
a
e
-
T
bl
8 1 80386 I nstructlon
et
oc S
CI
kC
ount
S
ummary
(C
ontlnue d)
CLOCK COUNT NOTES
Real Real
INSTRUCTION FORMAT
Address
Protected
Address
Protected
Mode
or
Virtual Mode
or
Virtual
Virtual
Address Virtual
Address
8086
Mode
8086 Mode
Mode
Mode
ARITHMETIC (Continued)
Register
from
Memory
I
00101
DOw
ImOdreg
r/ml
7 7 b
h
Memory
from
Register
I
0010101w
ImOdreg
rIm]
6 6 b h
Immediate
from
Register/Memory
I
100000sw
ImOdl01
rim]
immediate data
217
217
b h
Immediate
from
Accumulator (short
form)
I
0010t10wl
immediate data 2
2
SSS
= Subtract
with
Borrow
Register
from
Register
I
00011
Odw
ImOdreg
r/ml
2
2
Register from Memory
I
0001
1
00
w I
mod
reg
rIm]
7 7 b h
Memory
from
Register
I
0001
1
01
w I
mod
feg
rIm]
6 6 b h
Immediate
from
Register/Memory
I
1
000
a 0 5 W I
mod
a 1 1 rIm]
immediate
data
217 217 b h
Immediate
from
Accumulator (short
form)
10001110wl
immediate data 2
2
DEC
= Decrement
Register/Memory
I
1111111Wlreg001
r/ml
2/6
2/6
b h
Register (short form)
101001
regl
2 2
CMP
~
Compare
Register
with
Register
o 0 1 1 1 0 d w I mod
reg
r/ml 2 2
Memory
with
Register
00111
OOw ImOdreg
r/ml
5 5 b h
Register
with
Memory
0011101w
ImOdreg
r/ml
6 6 b h
Immediate
with
RegisterlMemory
1
00000
s w I mod 1 1 1
r/ml immediate data
2/5
2/5
b
h
Immediate
with
Accumulator
(short
form)
001111
Ow I
immediate data
2 2
NEG
~
Change Sign
I
1 1 1 1
01
1 w I
mod
0 1 1
r/ml
2/6 2/6
b h
AAA
~
ASCII
Adjust
for
Add
I
00110111
I
4
4
AAS
~
ASCII
Adjust
for
Subtract
L
00
111111J
4 4
DAA
~
Decimal Adjust
for
Add
I
00100111
I 4 4
DAS = DeCimal Adjust for Subtract
I
00101111
I
4 4
MUL
~
Multiply (unsigned)
Accumulator
with
RegisterlMemory
I
1111011
w
ImOd
100
r/ml
Multiplier-Byte
9-14/12-17
9-14/12-17
b,
d
d,
h
-Word
9-22/12-25
9-22/12-25
b,
d
d,
h
-Doubleword
9-38/12-41
9-38/12-4f
b,
d
d,
h
IMUL = Integer Multiply (signed)
Accumulator
with
RegisterlMemory
I
1111011
w
ImOd
1
00
r/ml
Multiplier-Byte
I
9-14/12-17
9-14/12-17
b,d
d,
h
-Word
I
9-22/12-25
9-22/12-25
b,d
d,
h
-Doubleword
9-38/12-41
9-38/12-41
b,d
d,
h
Register
with
Register IMemory
I
00001111
I
10101111
Imod
reg
r/ml
-Word
9-22/12-25
9-22/12-25
b,
d
d,
h
-Ooubleword
9-38/12-41
9-38/12-41
b,d
d,
h
RegisterlMemory
with
Immediate
to
Register I
01
1010
s 1
Imod
reg
r/ml immediate data
-Word
9-22/12-25
9-22/12-25
b,
d
d,
h
-Doubleword
9-38/12-41
9-38/12-41
b,
d
d,
h
113