[clang] [llvm] [APFloat] Add APFloat support for FP6 data types (PR #94735)

[Thomas Raoux via cfe-commits]

ThomasRaoux wrote:

> (If it's for MLIR support, I'd like to have a discussion there, since I don't thisk these scalars belong in `FloatType` and that the long-term solution is to allow arbitrary newtypes / tags on bits / ... up there)

I don't want to speak for the author but I'm interested in this support. I replied on your thread on discourse:
https://discourse.llvm.org/t/rfc-should-the-ocp-microscaling-float-scalars-be-added-to-apfloat-and-floattype/77530/8

https://github.com/llvm/llvm-project/pull/94735