Jump functions for Xorshift family

From http://xoroshiro.di.unimi.it

> All generators, being based on linear recurrences, provide jump functions that make it possible to simulate any number of calls to the next-state function in constant time, once a suitable jump polynomial has been computed. We provide ready-made jump functions for a number of calls equal to the square root of the period, to make it easy generating non-overlapping sequences for parallel computations.

Would it be possible to implement jump functions in this package?
This seems like a nice addition for parallel usage.

No file or test is identified. Start by locating the package's Xorshift-family generators and compare them with the jump-function guidance at xoroshiro.di.unimi.it. Done means the relevant generators support constant-time jumps that produce non-overlapping sequences for parallel computations.

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