[libc-commits] [libc] [llvm] [libc][math][c23] Add {, u}fromfp{, x}{, f, l, f128} functions (PR #86003)

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overmighty wrote:

> By the way, `roundeven` could be implemented similarly to `fputil::round` and the branches for `FP_INT_TONEAREST` in `fputil::round_using_specific_rounding_mode`. I can work on this later if you want.

Addressed by #87678.

https://github.com/llvm/llvm-project/pull/86003