[squeak-dev] Float storage as Double?

Lawson English lenglish5 at cox.net
Mon Apr 26 20:33:51 UTC 2010

Randal L. Schwartz wrote:
>>>>>> "Chris" == Chris Muller <asqueaker at gmail.com> writes:
> Chris> Hi Levente, it does?  Does that mean that (Float fromIEEE32Bit:
> Chris> myFloat asIEEE32BitWord) loses information?  What would be a more
> Chris> precise method of serialization then?
> You know, if you aren't going to pay attention to what I was saying
> in the #squeak channel, why were you even asking.
> I *said* this to you.  I said "looks like Float is 64 bit, and
> FloatArray is 32..Maybe mandel is storing things in FloatArray and
> that's where you're getting your truncation from, and if so one way out
> of that would be to use real Array instead of FloatArray"
> I'm slightly tweaked that you ignored that, and you're now at the same
> place two days later.
> I also told you that Mandel is always a myth, because the point at which
> the powers exceed 2 depends very much (butterfly effect-ish) on the
> precision of the representation.  A version with 48-bit mantissas will
> look different than one with 24-bit mantissas, and different again from
> one with 100-bit mantissas.
I think that you meant to direct that at me...

/me looks sheepish.


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