Do all the carnivore dinosaurs walk on four legs?

It´s likely they could perch on two legs. However, looking at their short, webbed, hind legs, it´s likely they had a hard time bouncing around like birds do. Besides, looking at gliding reptiles today, it´s most likely that pterodactyls evolved from four legged reptiles similar to lizards, which suggests that they must have felt more comfortable walking on their four legs instead of two.