Class XoShiRo256Plus

All Implemented Interfaces:
RandomLongSource, JumpableUniformRandomProvider, LongJumpableUniformRandomProvider, RestorableUniformRandomProvider, UniformRandomProvider

public class XoShiRo256Plus extends AbstractXoShiRo256
A fast 64-bit generator suitable for double generation. This is slightly faster than the all-purpose generator XoShiRo256StarStar.

This is a member of the Xor-Shift-Rotate family of generators. Memory footprint is 256 bits and the period is 2256-1.

Since:
1.3
See Also:
  • Constructor Details

    • XoShiRo256Plus

      public XoShiRo256Plus(long[] seed)
      Creates a new instance.
      Parameters:
      seed - Initial seed. If the length is larger than 4, only the first 4 elements will be used; if smaller, the remaining elements will be automatically set. A seed containing all zeros will create a non-functional generator.
    • XoShiRo256Plus

      public XoShiRo256Plus(long seed0, long seed1, long seed2, long seed3)
      Creates a new instance using a 4 element seed. A seed containing all zeros will create a non-functional generator.
      Parameters:
      seed0 - Initial seed element 0.
      seed1 - Initial seed element 1.
      seed2 - Initial seed element 2.
      seed3 - Initial seed element 3.
    • XoShiRo256Plus

      protected XoShiRo256Plus(XoShiRo256Plus source)
      Creates a copy instance.
      Parameters:
      source - Source to copy.
  • Method Details

    • nextOutput

      protected long nextOutput()
      Use the current state to compute the next output from the generator. The output function shall vary with respect to different generators. This method is called from AbstractXoShiRo256.next() before the current state is updated.
      Specified by:
      nextOutput in class AbstractXoShiRo256
      Returns:
      the next output
    • copy

      protected XoShiRo256Plus copy()
      Create a copy.
      Specified by:
      copy in class AbstractXoShiRo256
      Returns:
      the copy