POV-Ray : Newsgroups : povray.general : Real benefit of a 64 bit Pov binary on a 64 bit CPU in a 64 bit opsys? : Re: Real benefit of a 64 bit Pov binary on a 64 bit CPU in a 64 bit opsys? Server Time
1 Aug 2024 06:19:41 EDT (-0400)
  Re: Real benefit of a 64 bit Pov binary on a 64 bit CPU in a 64 bit opsys?  
From: Warp
Date: 8 Aug 2006 05:46:01
Message: <44d85d58@news.povray.org>
Alain <ele### [at] netscapenet> wrote:
> OK then. So, as long as your results STAY in the FPU and you keep on reusing 
> them, you can keep an improved acuracy. But, as soon as you need to put your 
> results anywhere else, you fall back to 64 bits acuracy.

  Not really. You can store the numbers in memory using the 80-bit
accuracy. In C/C++ you can usually do that with the 'long double' type.

  I don't know, however, if there's a speed penalty in storing/reading
memory in units larger than 64 bits...

-- 
                                                          - Warp


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