Re: [boost] [random] new threefry random engine

Subject: Re: [boost] [random] new threefry random engine
From: Thijs (M.A.) van den Berg (thijs_at_[hidden])
Date: 2014-04-20 12:25:36

On Apr 20, 2014, at 5:18 PM, Mathias Gaunard <mathias.gaunard_at_[hidden]> wrote:

> On 18/04/14 10:00, Thijs van den Berg wrote:
> 
>>> 
>>> Do not use reinterpret_cast in operator().
>>> The behavior is undefined, and will certainly
>>> differ depending on endianness.
>> I did this for speed and I didn’t worry about endianness because it never crossed my mind. Changing the order of bits/bytes should not affect the quality of the randomness, but it’s indeed not nice to have different behaviour on different machines. I’ll fix this.
> 
> Personally I would want this engine to produce exactly the same results as the reference random123 implementation for a given seed.
> 
> This should be the case regardless of the platform used.
> 
I totally agree, I want that too.

Ive removed the reinterpret_cast, but it would be nice if we could very its behavior, eg on a platform that has different endianness. 

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