Fly-by-wire plus some enhancement by the computer probably.or a mixture?
For example, as I understand it, in launch mode off a carrier, fighter jets are put into an automatic launch mode, where the computer flys the jet for the first few seconds. That's because the g-forces from the launch can possibly compromise the pilot's ability to control the takeoff well. In-cockpit videos often show the pilot grabbing onto handles near the baseline of the canopy for the launches.
So in general, fly-by-wire computers take the pilots' inputs and process them to best control the aircraft. Some advanced aircraft are too unstable to control with just human control (not commercial aircraft).