Copying the example by sparkie, something like this? https://godbolt.org/z/xhdnb9ax3 https://godbolt.org/z/xhdnb9ax3 I get +0.0 if I comment the round to negat

Copying the example by sparkie, something like this? https://godbolt.org/z/xhdnb9ax3 https://godbolt.org/z/xhdnb9ax3 I get +0.0 if I comment the round to negative option.