math.rng

Class Interleaved4Stc64

java.lang.Object

math.rng.AbstractRng64

math.rng.Interleaved4Stc64

All Implemented Interfaces:

PseudoRandom, PseudoRandomStream, SplittablePseudoRandom

public class Interleaved4Stc64
extends AbstractRng64
implements SplittablePseudoRandom

4 daisy-chained Stc64 generators that are called in round-robin fashion, i.e., first gen_0, then gen_1, then gen_2, then gen_3, then again gen_0 and so on. This should still be a little faster than a MersenneTwister64 but is a lot slower (about 2.5x) than working with a single Stc64 generator. The generators following gen_0 are constructed by calling SplittablePseudoRandom.split() on the respective predecessor generator.

Field Summary

Fields inherited from class math.rng.AbstractRng64

DOUBLE_NORM, FLOAT_NORM, nextGaussian, unused

Constructor Summary

Constructors

Modifier	Constructor and Description
	Interleaved4Stc64()
	Interleaved4Stc64(long seed)
	Interleaved4Stc64(long[] seed)
protected	Interleaved4Stc64(Stc64 gen0, Stc64 gen1, Stc64 gen2, Stc64 gen3)

Method Summary

Modifier and Type	Method and Description
static SplittablePseudoRandom	getDefault()
long	nextLong()
Interleaved4Stc64	split() Constructs and returns a new SplittablePseudoRandom instance that shares no mutable state with the current instance.

Methods inherited from class math.rng.AbstractRng64

beta, beta, cauchy, cauchy, chiSquare, chiSquare, doubles, doubles, doubles, doubles, exponential, exponential, gamma, gamma, getAlgorithm, getSeed, ints, ints, ints, ints, logNormal, logNormal, longs, longs, longs, longs, next, nextBoolean, nextBytes, nextDouble, nextDouble, nextDoubles, nextFloat, nextFloat, nextGaussian, nextGaussian, nextInt, nextInt, nextInt, nextLong, nextLong, nextLongs, normal, normal, saveSeed, saveSeed, studentT, studentT, weibull, weibull

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface math.rng.PseudoRandom

getAlgorithm, getSeed, next, nextBoolean, nextBytes, nextDouble, nextDouble, nextDoubles, nextFloat, nextFloat, nextGaussian, nextGaussian, nextInt, nextInt, nextInt, nextLong, nextLong, nextLongs

Methods inherited from interface math.rng.PseudoRandomStream

beta, beta, cauchy, cauchy, chiSquare, chiSquare, doubles, doubles, doubles, doubles, exponential, exponential, gamma, gamma, ints, ints, ints, ints, logNormal, logNormal, longs, longs, longs, longs, normal, normal, studentT, studentT, weibull, weibull

Constructor Detail

Interleaved4Stc64

public Interleaved4Stc64()

Interleaved4Stc64

public Interleaved4Stc64(long seed)

Interleaved4Stc64

public Interleaved4Stc64(long[] seed)

Interleaved4Stc64

protected Interleaved4Stc64(Stc64 gen0,
                            Stc64 gen1,
                            Stc64 gen2,
                            Stc64 gen3)

Method Detail

nextLong

public final long nextLong()

Specified by:

nextLong in interface PseudoRandom

Specified by:

nextLong in class AbstractRng64

split

public Interleaved4Stc64 split()

Description copied from interface: SplittablePseudoRandom

Constructs and returns a new SplittablePseudoRandom instance that shares no mutable state with the current instance. However, with very high probability, the values collectively generated by the two instances have the same statistical properties as if the same quantity of values were generated by a single thread using a single SplittablePseudoRandom instance. Instances of SplittablePseudoRandom are not thread-safe. They are designed to be split, not shared, across threads.

Specified by:

split in interface SplittablePseudoRandom

Returns:

a new SplittablePseudoRandom instance that shares no mutable state with the current instance

getDefault

public static SplittablePseudoRandom getDefault()