[Mesa-dev] Performance glxSwapBuffers 32 bit vs. 64 bit

[Theiss, Ingo]

> > 
> > Ok I have added -mfpmath=sse to the 32-bit CFLAGS and the readback
> > performance increased from 30.44 Mpixels/sec to 48.92 Mpixel/sec. We
> > are getting closer to the 64-bit performance.
> 
> hmm. you should try -msse2 too. It's implied on 64bits, and I'm not sure if -march/-mfpmath=sse by itself will enable the intrinsics.
> 
> Jose
> 

Added -msse2 to the CFLAGS but that did not increase the performance any further.

Thanks for you help.

Ingo