Re: [Mesa3d-dev] Linux-x86 FAST_MATH macros in mmath.h

[Gareth H. <ga...@va...>]

Gareth Hughes wrote:
> 
> After discussions with Brian and Josh, I'm adding an fnclex instruction
> to the END_FAST_MATH macro to clear any FP exceptions that may have
> occurred in the FAST_MATH block.  It seems pointless to have a
> GCC-specific END_FAST_MATH, when I can convert the entire block to
> inline assembly and get rid of the _FPU_SET* checks etc.
> 
> Do people have strong objections to this?  I'm essentially adding GCC as
> a requirement to enable the fast math stuff, but with our change in
> policy regarding FP exceptions this seems reasonable -- and we can
> always add non-GCC code for other Linux-x86 targets as required.

I've changed the linux/x86 requirement to GCC/x86, which will allow
other OSes running on x86 that compile Mesa with GCC to benefit from the
FAST_MATH code (perhaps the *BSDs?).  Nice and clean, in any case.

-- Gareth