[Scilab-users] Bitget for int64/uint64
Stéphane Mottelet
stephane.mottelet at utc.fr
Thu Feb 27 16:37:40 CET 2020
You should generate big ints like this:
a=uint64(2)^61
S.
Le 27/02/2020 à 16:17, JLan a écrit :
> I wonder if i have misunderstood the documentation for bitget, or if this is
> a bug? It seems to me that numbers > 2^53 are still not handled correctly.
> --> a=uint64(2^61)
> a = 2305843009213693952
> --> b=uint64(2^61)+1
> b = 2305843009213693953
> --> bitget(a,1:64)
> ans =
> column 1 to 32
> 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> 0 0 0 0 0 0 0
> column 33 to 64
> 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> 0 0 0 0 1 0 0
>
> --> bitget(b,1:64)
> ans =
> column 1 to 32
> 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> 0 0 0 0 0 0 0
> column 33 to 64
> 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> 0 0 0 0 1 0 0
>
>
>
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Stéphane Mottelet
Ingénieur de recherche
EA 4297 Transformations Intégrées de la Matière Renouvelable
Département Génie des Procédés Industriels
Sorbonne Universités - Université de Technologie de Compiègne
CS 60319, 60203 Compiègne cedex
Tel : +33(0)344234688
http://www.utc.fr/~mottelet
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