AlignPowTwo returns the next 2^n >= x, for some integer n.

AlignPowTwo32 returns the next 2^n >= x, for some integer n.

AlignPowTwo64 returns the next 2^n >= x, for some integer n.

IsPowTwo returns true iff x == 2^n for some integer n >= 0.

IsPowTwo32 returns true iff x == 2^n for some integer n >= 0.

IsPowTwo64 returns true iff x == 2^n for some integer n >= 0.

NextPowTwo returns the next 2^n > x, for some integer n.

NextPowTwo32 returns the next 2^n > x, for some integer n.

NextPowTwo64 returns the next 2^n > x, for some integer n.

Pow implements x^n for integers.