[llvm] [AArch64][GlobalISel] Expand handling for fptosi and fptoui (PR #70635)

[David Green via llvm-commits]

davemgreen wrote:

I wrote this a while ago, but haven't had much time to get it cleaned up and whatnot. I have a few other patches in a similar vein.

https://github.com/llvm/llvm-project/pull/70635