Additions to std.math.
Returns true iff n is a power of 2.
Returns largest power of 2 which <= n.
Returns smallest power of 2 which >= n.
Returns the base-2 logarithm of largest power of 2 which <= n.
Returns the base-2 logarithm of smallest power of 2 which >= n.
Aligns n up or down.
Aligns n up or down.