[Scilab-users] Bitget for int64/uint64

[Stéphane Mottelet]

But the problem with bitget remains. The new bitstring is ok:

--> bitstring(a)
  ans  =

"0010000000000000000000000000000000000000000000000000000000000000"

--> bitstring(a+1)
  ans  =

"0010000000000000000000000000000000000000000000000000000000000001"

S.

Le 27/02/2020 à 16:37, Stéphane Mottelet a écrit :
> 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