From: Paul Giaccone (paulg_at_[hidden])
Date: 2006-05-02 12:46:08
Sebastian Redl wrote:
>Paul A Bristow wrote:
>>The Standard is imprecise on this issue, but I feel it is a very poor do
>>that such a bizarre small range of values should be wrong.
>>Feels like an off-by-one rounding bug to me.
>I tend to agree with the MS engineers here. I've found out only
>yesterday that the FPU/math library is not entirely deterministic in
>some calculations (including square roots and trigonometry, typical 3d
>stuff), so I think worrying about serialization/deserialization is useless.
But we're not talking about calculations here - you always get rounding
error in floating-point calculations, and we handle it accordingly. But
if I write out 1.2345 and it becomes 1.2346 when I read it back, that's
cause for concern.
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