[llvm] [AArch64] Legalize fp128 scalars as libcalls for G_FCMP (PR #98452)

[via llvm-commits]

Him188 wrote:

Let's add some MIR tests, to show how the MIR looks like after legalization. We won't cover every conds as in the ll test, but just some representatives.

https://github.com/llvm/llvm-project/pull/98452