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AMD Confidential
User Manual November 21
st
, 2008
218 Appendix A
Instruction
Supported
Mnemonic
Opcode
Description
TEST reg/mem64,reg64
85 /r
AND the contents of a 64-bit register
with the contents of a 64-bit
register or memory operand and set
rFLAGS to reflect the result.
XADD reg/mem8,reg8
0F C0 /r
Exchange the contents of an 8-bit
register with the contents of 8-bit
destination register or memory
operand and load their sum into the
destination.
XADD reg/mem16,reg16
0F C1 /r
Exchange the contents of a 16-bit
register with the contents of 16-bit
destination register or memory
operand and load their sum into the
destination.
XADD reg/mem32,reg32
0F C1 /r
Exchange the contents of a 32-bit
register with the contents of 32-bit
destination register or memory
operand and load their sum into the
destination.
XADD reg/mem64,reg64
0F C1 /r
Exchange the contents of a 64-bit
register with the contents of 64-bit
destination register or memory
operand and load their sum into the
destination.
XCHG AX,reg16
90 +rw
Exchange the contents of AX register
with the contents of a 16-bit
register.
XCHG reg16,AX
90 +rw
Exchange the contents of a 16-bit
register with the contents of the AX
register.
XCHG AX,reg32
90 +rd
Exchange the contents of EAX register
with the contents of a 32-bit
register.
XCHG reg32,AX
90 +rd
Exchange the contents of a 32-bit
register with the contents of the EAX
register.
XCHG RAX,reg64
90 +rq
Exchange the contents of RAX register
with the contents of a 64-bit
register.
XCHG reg64,RAX
90 +rq
Exchange the contents of a 64-bit
register with the contents of the RAX
register.
XCHG reg/mem8,reg8
86 /r
Exchange the contents of an 8-bit
register with the contents of an 8-
bit register or memory operand.
XCHG reg8,reg/mem8
86 /r
Exchange the contents of an 8-bit
register or memory operand with the
contents of an 8-bit register.
XCHG reg/mem16,reg16
87 /r
Exchange the contents of a 16-bit
register with the contents of a 16-
bit register or memory operand.
XCHG reg16,reg/mem16
87 /r
Exchange the contents of a 16-bit
register or memory operand with the
contents of a 16-bit register.
XCHG reg/mem32,reg32
87 /r
Exchange the contents of a 32-bit
register with the contents of a 32-
bit register or memory operand.
XCHG reg32,reg/mem32
87 /r
Exchange the contents of a 32-bit
register or memory operand with the
contents of a 32-bit register.
XCHG reg/mem64,reg64
87 /r
Exchange the contents of a 64-bit
register with the contents of a 64-
bit register or memory operand.
XCHG reg64,reg/mem64
87 /r
Exchange the contents of a 64-bit
register or memory operand with the
contents of a 64-bit register.
XLAT mem8
D7
Set AL to the contents of DS:[rBX +
unsigned AL].