[llvm] [MIPS] Implement llvm.fminimum and llvm.fmaximum with f32/f64 (PR #89907)

[Cinhi Young via llvm-commits]

Cyanoxygen wrote:

> max.fmt in R6 can process +0/-0 as `fmaximum` expects.

Oh yes you are right. min/max.fmt actually considers +0 > -0.

https://github.com/llvm/llvm-project/pull/89907