[llvm] [RISCV][FPEnv] Lowering of fpmode intrinsics (PR #148569)

[Serge Pavlov via llvm-commits]

spavloff wrote:

Yes, you are right. The value returned by `fegetmode` contains the entire FP state not only control modes. Probably this is because the result of `fegetmode` is intended for use in calls of `fesetmode` only, which already cleans the status bits. In general these unrelated bits could complicate some operations but I dont't how if this really creates problems. 

https://github.com/llvm/llvm-project/pull/148569