Nah, it's not supporting Trump at all, and he hardly ever misses an opportunity to not defend Trump. Ryan has thrown subterfuge at Trump at every turn, and that's because he's probably looking at a run in 2020 and it won't happen if Trump wins. Ryan clearly doesn't support Trump and he sure as isn't "bending over backwards" to support Trump.Clearly he doesn't want Trump as the nominee but calling him the textbook definition of a racist while saying he will be voting for him is supporting him.
Every time Trump says something dumb, Ryan is forced to defend him. He does so clearly half heartedly, but he still does.