PCG generator on GPU (CUDA)

Author:

Kai-Hsin Wu
kaihsinwu@gmail.com

Description

Straight forward translate of the O'Neill's basic pcg32 generator.

TODO:

- Optimize (probably PTX boost-up)
- Implemented other gens in the PCG family.
- k-dimentional stuff for longer period. 
- Other stuff.

References:

- The PCG website:
    http://www.pcg-random.org/