[PATCH] Combine bit test + conditional or into simple math

[David Majnemer]

On Sun, Apr 14, 2013 at 8:49 PM, Nick Lewycky <nicholas at mxc.ca> wrote:

> Please add asserts that C1 and C2 aren't zero (it would miscompile those
> cases). Looks good!
>

That shouldn't be needed, the code grabs C1 and C2 via m_Power2. However,
the comment that describes the function does deserve a clearer comment.
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