[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
>
>
>
> --
> Sent from: https://antispam.utc.fr/proxy/1/c3RlcGhhbmUubW90dGVsZXRAdXRjLmZy/mailinglists.scilab.org/Scilab-users-Mailing-Lists-Archives-f2602246.html
> _______________________________________________
> users mailing list
> users at lists.scilab.org
> https://antispam.utc.fr/proxy/1/c3RlcGhhbmUubW90dGVsZXRAdXRjLmZy/lists.scilab.org/mailman/listinfo/users

-- 
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




More information about the users mailing list