Daniel Keep wrote:
Slightly off-topic, but I just found this and thought it might be of
interest.
http://mjolnirstudios.com/IanBullard/files/79ffbca75a75720f066d491e9ea935a0-10.php
For reference, here is the ASM source for the mentioned Flipcode random
number generator:
pshufw mm1, mm0, 0x1E
paddd mm0, mm1
Finally, here's a link to the DieHard test on Wikipedia:
http://en.wikipedia.org/wiki/Diehard_tests
-- Daniel
Yeah. It's worth knowing that reason that linear congruential RNGs have
historically been used so much is because _they are the easiest to
analyze mathematically_, NOT because they are good in either speed or
randomness. Since the early days, the techniques for evaluating RNGs
have improved dramatically (and the DieHard test suite incorporates much
of the analysis), so their original selling point is gone.
There is NO REASON to use a linear congruential RNG as the default any more.
