Do fly-by-wire fighter aircraft automatically reverse the direction of control surface deflections during a tailslide? During a tailslide (a flight regime where the relative airflow over the aircraft is from the tail towards the nose; i.e., an attack angle between 90º and 270º; i.e., the airplane is moving tail-first), the airflow over the aircraft’s control surfaces is in the opposite of the usual direction, causing deflections of the aircraft’s flight control surfaces to produce motions opposite those that would be produced in forward flight (for instance, in a tailslide, applying up elevator will cause the nose to pitch down, and left rudder will yaw the nose right).

Given that:


modern fighter aircraft use computerised fly-by-wire control systems instead of the mechanical linkages used in pre-21st-century fighters;
fighters are optimised for extreme maneuverability to the extent that a tailslide would be very easy to enter;
intentional tailslides could easily occur during combat maneuvering, or - even more likely - during an airshow;
and the control reversal inherent in a tailslide, like all types of flight control reversal, could easily kill an unwary pilot;


do modern fighters, during a tailslide, automatically reverse the commanded direction of flight control surface deflections relative to the direction that would be used in normal flight (for instance, applying down elevator rather than up if the pilot pulls back on the yoke in a tailslide)?
While the reversal of flight controls does happen, it is transient in nature, and in virtually all cases if you let the aircraft "fly" itself it will pitch down and recover.

Only aircraft with thrust to weight ratio of at least 1 to 1, and thrust vectoring of some sort if a jet, will be able to maintain the nose high attitude.

Prop aircraft are a different story as they essentially "hang" from the prop if the engine can develop enough power to do that.

Recovering from a tail slide is not like recovering from a stall or spin, you can't really use flight controls for anything until the aircraft develops enough airspeed for them to be effective, and in 100% of the times I have been in one, by that time the relative wind is normal and not reversed.

The exception is in prop aircraft where the prop wash against the rudder and elevator does provide some control effectiveness, but not reversed.