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Re: Random numbers for C: End, at last?
Posted:
Nov 29, 2004 6:54 PM
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I wrote:
>> Looking at the code in Marsaglia's post at <a href="http://tinyurl.com/4etu9,">http://tinyurl.com/4etu9,</a> I can
>> see a few places where a 32-bit word was implicitly required: SHR3, CONG,
>> FIB, LFIB4, and SWB. So yes, if you want those to behave as if they were on
>> a 32-bit machine, you'll need to insert appropriate AND-masking to make it
>> so.
and DZ replied:
> I'm going with an easy but non-portable solution that works with GNU
> g++/gcc. Is explicit AND-masking more efficient? Replace
>
> typedef unsigned long UL;
>
> in <a href="http://tinyurl.com/4etu9">http://tinyurl.com/4etu9</a> with
>
> #include <stdint.h>
> typedef uint32_t UL;
That looks like an excellent solution to me! I believe the compiler will do
a better job of figuring out how to accomplish the task than if you
explicitly added the masking.
Bob H
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