[libc-commits] [libc] [libc][math][c23] Add fsub{, l, f128} and remainderf128 C23 math functions (PR #101576)

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overmighty wrote:

I forgot that `remainder*` functions are pretty much the same as `remquo*`, and we do have tests for those, so I guess that's why we don't have tests for `remainder*`.

https://github.com/llvm/llvm-project/pull/101576