Author: Uri Blass
Date: 12:29:02 11/04/02
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On November 04, 2002 at 15:07:12, Severi Salminen wrote:
>>>>__int64 rand64()
>>>>{
>>>> int a,b,c,d,e;
>>>> a=rand();
>>>> b=rand()<<15;
>>>> c=rand()<<30;
>>>> d=rand()<<45;
>>>> e=rand()<<60;
>>>>
>>>> return a^((__int64)b)^((__int64)c)^
>>>> ((__int64)d)^((__int64)e);
>>>>}
>>>
>>>Under most systems, d and e will be zero.
>
>A few points. As Dieter said, the above is wrong, because of too late type
>casts. Secondly why do you use xor? Why not or?
I admit that I copied the function to generate random 64 bit number
from bruce's site
http://www.seanet.com/~brucemo/topics/zobrist.htm
xor was used there.
> Or has a definite sequence
>points and can be used like in your original rand64():
I used xor also in the previous function.
Uri
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