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Instruction Set
Instruction
LOOPNZ/LOOPNE Offset
LOOPZ/LOOPE Offset
LSL Load Segment Limit
From Register/Memory
LSS Load Pointer to SS
LTR Load Task Register
From Register/Memory
LEAVE Leave Current Stack Frame
MFENCE
MOV Move Data
Register to Register
Register to Memory
Register/Memory to Register
Immediate to Register/Memory
Immediate to Register (short form)
Memory to Accumulator (short form)
Accumulator to Memory (short form)
MOV Move to/from Segment Registers
To Stack Segment
To all other segments:
Register/Memory to Segment Register
Segment Register to Register/Memory
MOV Move to/from Control Registers
Register to CR
CR to Register
MOV Move To/From Debug Registers
Register to DR
DR to Register
MOV Move To/From Test Registers
Register to TR
TR to Register
MOVS Move String
MOVSX Move with Sign Extension
Register from Register/Memory
MOVZX Move with Zero Extension
Register from Register/Memory
MUL Unsigned Multiply
Accumulator with Register/Memory
Multiplier:
Byte
Word
Doubleword
NEG Negate Integer
NOP No Operation
NOT Boolean Complement
OIO Official Invalid Opcode
OR Boolean OR
Register to Register
Register to Memory
Memory to Register
Immediate to Register/Memory
Immediate to Accumulator
AMD Geode™ LX Processors Data Book
Table 8-26. Processor Core Instruction Set (Continued)
Opcode
E0 +
E1 +
0F 03 [mod reg r/m]
0F B2 [mod reg r/m]
0F 00 [mod 011 r/m]
C9
8 [10dw] [11 reg r/m]
8 [100w] [mod reg r/m]
8 [101w] [mod reg r/m]
C [011w] [mod 000 r/m] ###
B [w reg] ###
A [000w] +++
A [001w] +++
8E [mod sreg3 r/m]
8C [mod sreg3 r/m]
0F 22 [11 eee reg]
0F 20 [11 eee reg]
0F 23 [11 eee reg]
0F 21 [11 eee reg]
0F 26 [11 eee reg]
0F 24 [11 eee reg]
A [010w]
0F B[111w] [mod reg r/m]
0F B[011w] [mod reg r/m]
F [011w] [mod 100 r/m]
F [011w] [mod 011 r/m]
90
F [011w] [mod 010 r/m]
0F FF
0 [10dw] [11 reg r/m]
0 [100w] [mod reg r/m]
0 [101w] [mod reg r/m]
8 [00sw] [mod 001 r/m] ###
0 [110w] ###
33234H
Clock Count
(Reg/Cache Hit)
Flags
Real
Prot'd
O D I
T S Z A P C
Mode
Mode
F F F F F F F F F
2
2
-
-
-
-
-
2
2
-
-
-
-
-
-
-
-
-
-
9
4
9/15
-
-
-
-
-
-
-
-
-
-
9
2
2
-
-
-
-
-
1
-
-
-
-
-
1
1
1
1
1
1
1
1
1
1
1
1
1
1
-
-
-
-
-
7/13
1
6/13
1
6/13
-
-
-
-
-
9-13
9-13
2-5
2-5
-
-
-
-
-
10/18
10/18
8/18
8/18
-
-
-
-
-
2
2
1
1
4
4
-
-
-
-
-
-
-
-
-
-
1
1
-
-
-
-
-
1
1
x
-
-
-
x
3
3
4
4
7
7
1
1
x
-
-
-
x
1
1
-
-
-
-
-
1
1
-
-
-
-
-
1
8-125
-
-
x
0 -
0 -
-
-
x
1
1
1
1
1
1
1
1
1
1
Notes
Real
Prot'd
Mode
Mode
-
-
-
-
r
-
-
-
-
r
x
-
-
-
a
g,h,j,p
-
-
-
-
a
h,i,j
-
-
-
-
a
g,h,j,l
-
-
-
-
b
h
-
-
-
-
b
h
-
-
-
-
i,j
-
-
-
-
l
-
-
-
-
l
-
-
-
-
u
l,u
-
-
-
-
b
h
-
-
-
-
b
h
-
-
-
-
b
h
x
u u x
b
h
x
x
x
x
b
h
-
-
-
-
-
-
-
-
b
h
-
-
-
-
x
u x
0
b
h
639
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