Opcode XADD
CPU: i486+
Type of Instruction: User
Instruction: XADD dest,sorc
Description:
Temporary <- dest;
dest <- dest + sorc;
sorc <- Temporary;
Flags Affected: ZF,OF,SF,AF,PF,CF ( like ADD instruction ) ( see description)
CPU mode: RM,PM,VM,SMM
+++++++++++++++++++++++
Physical Form: XADD r/m8,r8
COP (Code of Operation) : 0FH C0H Postbyte
Clocks:
Intel i486 : 3/4
Cyrix Cx486SLC : 3/6
Pentium (tm) : 3/4
Penalty if cache miss :
Intel i486 : 6/2 ; Unlocked/Locked
Cyrix Cx486SLC : 0 ; N/A
+++++++++++++++++++++
Physical Form: XADD r/m16,r16
XADD r/m32,r32
COP (Code of Operation) : 0FH C1H Postbyte
Clocks:
Intel i486 : 3/4
Cyrix Cx486SLC : 3/6
Pentium (tm) : 3/4
Penalty if cache miss :
Intel i486 : 6/2 ; Unlocked/Locked
Cyrix Cx486SLC : 1 ; N/A
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