[libc-commits] [compiler-rt] [libc] [llvm] [compiler-rt][builtins] add libc-backed arithmetic builtins (PR #207092)

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hulxv wrote:

> Curious that there's no `negtf2` in this patch? We've got +−×÷ for all three of single, double and quad, and we've added negation for single and double, but not for quad.
> 
> LGTM anyway – `negtf2` can always be added in a separate patch if it's wanted. But it struck me as an odd thing to leave out.

Currently, `negtf2` does not exist in the builtins. We may add it later if you see that it should be

https://github.com/llvm/llvm-project/pull/207092