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Re: Floating-point differences between ARM processors
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Re: Floating-point differences between ARM processors


  • Subject: Re: Floating-point differences between ARM processors
  • From: Rick Mann <email@hidden>
  • Date: Mon, 07 Jan 2013 15:24:35 -0800

On Jan 7, 2013, at 11:22 , Greg Parker <email@hidden> wrote:

> Note also that physics simulations will always need to be careful with the error inherent to finite precision floating-point arithmetic. IEEE specification of exact results for every operation wouldn't solve that.

We don't care so much about correct results as we do repeatable results. When you write a multiplayer Game Center game, you have to pass around initial conditions and expect the simulation to run deterministically across platforms.

--
Rick




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References: 
 >Floating-point differences between ARM processors (From: Rick Mann <email@hidden>)
 >Re: Floating-point differences between ARM processors (From: vincent habchi <email@hidden>)
 >Re: Floating-point differences between ARM processors (From: Rick Mann <email@hidden>)
 >Re: Floating-point differences between ARM processors (From: Greg Parker <email@hidden>)

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