EXG - M68K instruction reference

exgExchange registers 
Exchanges the full long contents of two registers.
Size .l
XNZVC –––––
Changes no flag
Forms  exg ,   
Operands Rn A data or address register, d0 to d7 or a0 to a7. More
 * --- Data registers ---
move.l #$AAAA, d0
move.l #$BBBB, d1
exg d0, d1

* --- Data and address register ---
move.l #$1234, d2
move.l #$5678, a0
exg d2, a0