[libc-commits] [libc] [libc][math] Optimize misc basic math operations with builtins when available (PR #99037)

[via libc-commits]

lntue wrote:

> The problem is that `maxss` and `minss` don't behave the same as IEEE 754 `maximumNumber` and `minimumNumber`. If one or both inputs are NaNs, `maxss` and `minss` just return the second input, whereas `maximumNumber` and `minimumNumber` return a quiet NaN unless both inputs are signaling NaNs.

Let skip the builtin / hardware instructions for these functions.

https://github.com/llvm/llvm-project/pull/99037