XOR/rotate/shift/rotate PNRG (See http://xoshiro.di.unimi.it/)
This is adapted from Samuel A. Falvo II's implementation. The original commentary follows:
As taken from ttp://en.wikipedia.org/wiki/Mersenne_twister
I am aware of Wil Baden's sources, but I had difficulty getting it to compile under SwiftForth out of the box.
This module exposes the following API:
seeded ( uSeed -- ) Seeds the random number generator with the provided 32-bit, unsigned value.
probability ( -- u ) Returns a random value that falls in the range [0, $FFFFFFFF].
All other definitions are safe to shadow/redefine elsewhere.
Copyright (c) 2010, Samuel A. Falvo II All rights reserved.
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In adapting this, some concessions were made since RETRO only has signed 32-bit values.
random:mersenne:set-seed (n-) Seeds the random number generator with the provided 32-bit, unsigned value.
random:mersenne (-n) Returns a random value that falls in the range [0, n:MAX].