Comment by gopalv

The linked clang PR is also very readable.

https://github.com/llvm/llvm-project/pull/181288/files

As the PR clearly points out, you can do this in a register but not inside vectors.

I don't think fastdiv has had an update in years, which what I've used because compilers can't do "this is a constant for the next loop of 1024" like columnar sql needs.