[libc-commits] [libc] [libc][math] Fix missing underflow exception in DyadicFloat::generic_as (PR #186734)

[via libc-commits]

lntue wrote:

We probably should document/comment that the underflow will be raised if the pre-rounding values are underflow.  Then we might need to go over other functions and make sure that they have tests to cover this case if applicable (this can be done as a separate task/issue/pr).

https://github.com/llvm/llvm-project/pull/186734