>>37943582being on the spectrum myself i can say im pretty sure he exhibits the signs of at least aspergers, personality-wise anyway
although stuff like stammering, forgetfulness, and general non-sequitur dialogue are naturally absent since that'd go against the script and potentially undermine his portrayal
but one of the bigger giveaways is that cyrus handles things logically, wanting a pattern and/or connections between things that are too unpredictable or undefined in order to be categorized, with the human spirit being chief among them
one analogy is like going through the definitively shortest route through traffic on your way to work, but ending up late cause you hit every red light along the way; everything should add up to a predicted result, but just doesn't
correcting that equation is where cyrus' motives lie