Intel 386 User Manual page 651

Intel386™ EX EMBEDDED MICROPROCESSOR USER'S MANUAL
Table E-1. Instruction Set Summary (Sheet 13 of 19)
Instruction
Full displacement
0 0 0 0 1 1 1 1
JLE/JNG = jump on less or equal/not greater
8-bit displacement
0 1 1 1 1 1 1 0
Full displacement
0 0 0 0 1 1 1 1
JNLE/JG = jump on not less or equal/greater
8-bit displacement
0 1 1 1 1 1 1 1
Full displacement
0 0 0 0 1 1 1 1
JCXZ = jump on CX zero 1 1 1 0 0 0 1 1
JECXZ = jump on ECX
1 1 1 0 0 0 1 1
zero
(Address size prefix differentiates JCXZ from JECXZ)
LOOP = loop CX times 1 1 1 0 0 0 1 0
LOOPZ/LOOPE = loop
1 1 1 0 0 0 0 1
with zero/equal
LOOPNZ/LOOPNE =
1 1 1 0 0 0 0 0
loop while not zero
CONDITIONAL BYTE SET
(Note: Times are register/memory)
SETO = set byte on overflow
to register/memory 0 0 0 0 1 1 1 1
SETNO = set byte on not overflow
to register/memory 0 0 0 0 1 1 1 1
SETB/SETNAE = set byte on below/not above or equal
to register/memory 0 0 0 0 1 1 1 1
SETNB = set byte on below/above or equal
to register/memory 0 0 0 0 1 1 1 1
SETE/SETZ = set byte on equal/zero
to register/memory 0 0 0 0 1 1 1 1
SETNE/SETNZ = set byte on not equal/not zero
to register/memory 0 0 0 0 1 1 1 1
E-14
Format
1 0 0 0 1 1 0 1 Full displacement
8-bit displacement
1 0 0 0 1 1 1 0 Full displacement
8-bit displacement
1 0 0 0 1 1 1 1 Full displacement
8-bit displacement
8-bit displacement
8-bit displacement
8-bit displacement
8-bit displacement
1 0 0 1 0 0 0 0 mod 0 0 0 r/m
1 0 0 1 0 0 0 1 mod 0 0 0 r/m
1 0 0 1 0 0 1 0 mod 0 0 0 r/m
1 0 0 1 0 0 1 1 mod 0 0 0 r/m
1 0 0 1 0 1 0 0 mod 0 0 0 r/m
1 0 0 1 0 1 0 1 mod 0 0 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
7 + m or 7 + m or
3 3
7 + m or 7 + m or
3 3
7 + m or 7 + m or
3 3
7 + m or 7 + m or
3 3
7 + m or 7 + m or
3 3
9 + m or 9 + m or
5 5
9 + m or 9 + m or
5 5
11 + m 11 + m
11 + m 11 + m
11 + m 11 + m
4/5* 4/5*
4/5* 4/5*
4/5* 4/5*
4/5* 4/5*
4/5* 4/5*
4/5* 4/5*
Pro-
tected
Virtual
Ad-
dress
Mode
r
r
r
r
r
r
r
r
r
r
h
h
h
h
h
h