System.Random.SplitMix

SplitMix is a splittable pseudorandom number generator (PRNG) that is quite fast.

Guy L. Steele, Jr., Doug Lea, and Christine H. Flood. 2014. Fast splittable pseudorandom number generators. In Proceedings of the 2014 ACM International Conference on Object Oriented Programming Systems Languages & Applications (OOPSLA '13). ACM, New York, NY, USA, 453-472. DOI: https://doi.org/10.1145/2660193.2660195

Documentation

data SMGen

SplitMix generator state.

Instances

Show SMGen

Methods

showsPrec :: Int -> SMGen -> ShowS

show :: SMGen -> String

showList :: [SMGen] -> ShowS

RandomGen SMGen

Methods

next :: SMGen -> (Int, SMGen)

genRange :: SMGen -> (Int, Int)

split :: SMGen -> (SMGen, SMGen)

nextWord64 :: SMGen -> (Word64, SMGen)

Generate a Word64.

nextInt :: SMGen -> (Int, SMGen)

Generate an Int.

nextDouble :: SMGen -> (Double, SMGen)

Generate a Double in [0, 1) range.

splitSMGen :: SMGen -> (SMGen, SMGen)

Split a generator into a two uncorrelated generators.

Initialisation

mkSMGen :: Word64 -> SMGen

Preferred way to deterministically construct SMGen.

initSMGen :: IO SMGen

Initialize SMGen using system time.

newSMGen :: IO SMGen

Derive a new generator instance from the global SMGen using splitSMGen.

seedSMGen

Arguments

:: Word64

seed

-> Word64

gamma

-> SMGen

Create SMGen using seed and gamma.

seedSMGen' :: (Word64, Word64) -> SMGen

Like seedSMGen but takes a pair.

unseedSMGen :: SMGen -> (Word64, Word64)

Extract current state of SMGen.