Intel 386 User Manual page 643

Intel386™ EX EMBEDDED MICROPROCESSOR USER'S MANUAL
Table E-1. Instruction Set Summary (Sheet 5 of 19)
Instruction
MUL = multiply (unsigned)
accumulator with
1 1 1 1 0 1 1 w
register/memory
multiplier
— byte
— word
— doubleword
IMUL = Integer multiply (signed)
accumulator with regis-
1 1 1 1 0 1 1 w
ter/memory
multiplier
— byte
— word
— doubleword
register with regis-
0 0 0 0 1 1 1 1
ter/memory
multiplier
— byte
— word
— doubleword
register/memory with
0 1 1 0 1 0 s 1
immediate to register
— word
— doubleword
DIV = Divide (unsigned)
Accumulator by
1 1 1 1 0 1 1 w
register/memory
divisor
— byte
— word
— doubleword
E-6
Format
mod 1 0 0 r/m
mod 1 0 1 r/m
1 0 1 0 1 1 1 1 mod reg r/m
mod reg r/m immediate data
mod 1 1 0 r/m
Clock Count Notes
Real Pro- Real
Ad- tected Ad-
dress Virtual dress
Mode Ad- Mode
or dress or
Virtual Mode Virtual
8086 8086
Mode Mode
12-17/ 12-17/ b, d
15-20* 15-20*
12-25/ 12-25/ b, d
15-28* 15-28*
12-41/ 12-41/ b, d
17-46* 17-46*
12-17/ 12-17/ b, d
15-20* 15-20*
12-25/ 12-25/ b, d
15-28* 15-28*
12-41/ 12-41/ b, d
17-46* 17-46*
12-17/ 12-17/ b, d
15-20* 15-20*
12-25/ 12-25/ b, d
15-28* 15-28*
12-41/ 12-41/ b, d
17-46* 17-46*
13-26 13-26/ b, d
14-27
13-42 13-42/ b, d
16-45
14/17 14/17 b, e
22/25 22/25 b, e
38/43 38/43 b, e
Pro-
tected
Virtual
Ad-
dress
Mode
d, h
d, h
d, h
d, h
d, h
d, h
d, h
d, h
d, h
d, h
d, h
e, h
e, h
e, h