Hello Jan,
You will find => there
<https://codereview.scilab.org/cat/21421%2C2%2Cscilab/modules/elementary_functions/macros/bitget.sci>
a fixed version of bitget() for big u-int64 integers.
You can patch your Scilab 6.1.0 installation in the following way:
* download and unzip the file. rename it bitget.sci
* put bitget.sci in the SCI/elementary_functions/macros directory
* Run the following Scilab code in the console:
cd SCI/elementary_functions/macros
predef clear
genlib elementary_functionslib
clear bitget
And then test and use bitget in the current session and all forthcoming
ones.
Regards
Samuel
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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