Random.XorshiftPlus

Simple implementation of xorshift+.

>>> gen <- genXorshiftPlusInt 1
>>> getInt gen
2455688531189531812

IO version

type XorshiftPlus = XorshiftPlusST RealWorld

Random state

Generator

genXorshiftPlusWord

Arguments

:: Word

random seed

-> IO XorshiftPlus

Generate a new random state by a Word seed.

genXorshiftPlusInt

Arguments

:: Int

random seed

-> IO XorshiftPlus

Generate a new random state by an Int seed.

Values

getWord :: XorshiftPlus -> IO Word

Get a new random value as Word.

getInt :: XorshiftPlus -> IO Int

Get a new random value as Int.

getDouble :: XorshiftPlus -> IO Double

Get a new random value as Double [0, 1.0].

Low level, ST version

data XorshiftPlusST s

Random state

genXorshiftPlusWordST :: Word -> ST s (XorshiftPlusST s)

Generate a new random state by a Word seed.

getWordST :: XorshiftPlusST s -> ST s Word

Get a new random value as Word.

Internal

splitMix64Next :: Word# -> Word#

For first return value.

>>> W# (splitMix64Next 1##)
10451216379200822465