Filter
Top Products
AMD Confidential
User Manual November 21
st
, 2008
196 Appendix A
Instruction
Supported
Mnemonic
Opcode
Description
CMPXCHG8B
0F C7 /1 m64
Compare EDX:EAX register to 64-bit
memory location. If equal, set the
zero flag (ZF) to 1 and copy the
ECX:EBX register to the memory
location. Otherwise, copy the memory
location to EDX:EAX and clear the
zero flag.
CPUID
0F A2
Executes the CPUID function whose
number is in the EAX register.
DAA
27
Decimal adjust AL.
DAS
2F
Decimal adjusts AL after subtraction.
DEC reg/mem8
FE /1
Decrement the contents of an 8-bit
register or memory location by 1.
DEC reg/mem16
FF /1
Decrement the contents of a 16-bit
register or memory location by 1.
DEC reg/mem32
FF /1
Decrement the contents of a 32-bit
register or memory location by 1.
DEC reg/mem64
FF /1
Decrement the contents of a 64-bit
register or memory location by 1.
DEC reg16
48 +rw
Decrement the contents of a 16-bit
register by 1.
DEC reg32
48 +rd
Decrement the contents of a 32-bit
register by 1.
DIV reg/mem8
F6 /6
Perform unsigned division of AX by
the contents of an 8-bit register or
memory location and store the
quotient in AL and the remainder in
AH.
DIV reg/mem16
F7 /6
Perform unsigned division of DX:AX by
the contents of a 16-bit register or
memory location and store the
quotient in AX and the remainder in
DX.
DIV reg/mem32
F7 /6
Perform unsigned division of EDX:EAX
by the contents of a 32-bit register
or memory location and store the
quotient in EAX and the remainder in
EDX.
DIV reg/mem64
F7 /6
Perform unsigned division of RDX:RAX
by the contents of a 64-bit register
or memory location and store the
quotient in RAX and the remainder in
RDX.
ENTER imm16,0
CB iw 00
Create a procedure stack frame.
ENTER imm16,1
CB iw 01
Create a nested stack frame for a
procedure.
ENTER imm16,imm8
CB iw ib
Create a nested stack frame for a
procedure.
IDIV reg/mem8
F6 /7
Perform signed division of AX by the
contents of an 8-bit register or
memory location and store the
quotient in AL and the remainder in
AH.
IDIV reg/mem16
F7 /7
Perform signed division of DX:AX by
the contents of a 16-bit register or
memory location and store the
quotient in AX and the remainder in
DX.
IDIV reg/mem32
F7 /7
Perform signed division of EDX:EAX by
the contents of a 32-bit register or
memory location and store the
quotient in EAX and the remainder in
EDX.