Dunno about guided bombs, but cruise missiles have been using some pretty fascinating techniques to navigate before GPS was a thing. It's probably hard to find CPU specs, because they're defense technology.
It is surprisingly easy to find, as that stuff is pretty thoroughly covered in academic/industry journals. The only hinderance to access is a credit card number for the paywall.
The helicopter project is somewhere said to cost $80 million.
Would be interesting to know cost allocation for that Sony/Samsung chip. Project manager and scientists/engineers could have listed design challenges for industry player like TSMC/Apple go beat with an offering, a short run of 20 chips specifically for this helicopter.
