On Wed, 22 Mar 2023, Richard Biener wrote:
> I think it's even less realistic to expect users to know the details of > floating-point math. So I doubt any such sentence will be helpful > besides spreading some FUD? I think it's closer to "fundamental notions" rather than "details". For users who bother to read the GCC manual there's a decent chance it wouldn't be for naught. For documentation, I was thinking Together with -fexcess-precision=standard, -ffp-contract=off is necessary to ensure that rounding of intermediate results to precision implied by the source code and the FLT_EVAL_METHOD macro is not omitted by the compiler. Alexander
