Message-Id: <200004251736.NAA26252@delorie.com>
From: "Dieter Buerssner" <buers AT gmx DOT de>
To: djgpp-workers AT delorie DOT com
Date: Tue, 25 Apr 2000 20:41:32 +0200
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Subject: Re: rand() in libc
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On 25 Apr 00, at 11:13, DJ Delorie wrote:
 
> Do you have URLs for the tests you reference?
 
I found http://stat.fsu.edu/~geo/diehard.html in some old files.

For quick testing, write 3e6 32 bit random numbers in binary to a 
file. (The 31 bit random numbers of DJGPP must be shifted 1 to the 
left, because diehard/diequick needs a random msb) Then run diequick. 
Ignore results about the lsb. Any p-values close to one or close to 
zero are suspect. P-values very close (say 1e-5) to one or zero are 
failures.

My extended suite is not available. (There may be some legal issues.)
I can send logs, if anybody is interested. Logfiles (without verbose 
output) are about 80k for each PRNG, so I will send them directly to 
interested people. I do have logs for random, djgpp 2.03 rand(), the 
modified rand() with the 32 bit shift and the MWC RNG I suggested.