POV-Ray : Newsgroups : povray.general : GCC 4.0 aaand -march=k8 : Re: GCC 4.0 aaand -march=k8 Server Time
1 Aug 2024 18:24:36 EDT (-0400)
  Re: GCC 4.0 aaand -march=k8  
From: Matthias Weißer
Date: 3 Jul 2005 11:26:24
Message: <42c803a0$1@news.povray.org>
Raf256 schrieb:
> Hi,
> I just recompiled PovRAy 3.6 using not default GCC 3.2 and -march=i686,
> but gcc-4.0 and -march=k8 (but still in 32b mode).
> 
> Benchmark was a bit faster - about 34 minutes instead of 38 (Amd64 2800, 1
> GB ram), but the renderer images differed a bit - it looked liked photos
> where more blurred in gcc4/k8. Is gcc4 misscompiling povray?

I think -march=k8 uses the SSE unit to do floating point calculations. 
GCC 3.2 uses the x87 FPU I think.

-- 

mat### [at] matweide
http://www.matwei.de


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