Re: expected baseline changes for forky => proposal no more FPU and 80bits float/double on i386

On Fri, Aug 14, 2026 at 09:23:58PM +0900, Simon Richter wrote:
> Hi,

Hi Simon,

> On 8/14/26 19:27, Andrey Rakhmatullin wrote:
> 
> > > > Now that we have as baseline SSE2 could be possible to have 
> > > > #1127352 closed and use SSE for float and double.
> 
> > > Does that make sense if the goal is compatibility for older
> > > binaries, mostly games, that have been tested against x87 only?
> 
> > Yes, because the ABI stays the same.
> 
> The floating point results change, though, so the behaviour is different
> from what the software was tested with, especially the rounding behaviour is
> a lot more aggressive.
>...

you can compile software relying on the old behaviour with -mfpmath=387.

>    Simon

cu
Adrian