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    SubjectRe: [PATCH] Add "is_power_of_2" checking to log2.h.
    Date

    Robert P. J. Day <rpjday@mindspring.com> wrote:

    > +#define is_power_of_4(x) is_power_of_2(x) && (ffs(x) & 1))

    If this is such a commonly implemented op, it should probably be implemented
    globally too.

    I also wonder if there's some better way of implementing it than this, but I
    can't think of one offhand.

    David
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