8.6.2.0420
2ROT
two-rote
DOUBLE EXT
 
( x1 x2 x3 x4 x5 x6 -- x3 x4 x5 x6 x1 x2 )

Rotate the top three cell pairs on the stack bringing cell pair x1 x2 to the top of the stack.

Testing:
T{       1.       2. 3. 2ROT ->       2. 3.       1. }T
T{ MAX-2INT MIN-2INT 1. 2ROT -> MIN-2INT 1. MAX-2INT }T