On Tue, 27 Feb 2007 01:05:26 +0100 (MET)
Jan Engelhardt [off-list ref] wrote:

On Feb 26 2007 15:44, Stephen Hemminger wrote:

quoted

quoted

quoted

-		x = (2 * x + (uint32_t) div64_64(a, x*x)) / 3;
+		x = (2 * x + (u32) (a / x*x)) / 3;

Previously there was div64_64(a, x*x) which is equivalent to
(a)/(x*x), or just: a/(x^2). But now you do a/x*x, which is
equivalent to a*x/x (in the domain of real numbers). Furthermore,
a/x*x is a-(a%x), which does not even remotely match a/(x^2).

Been there, done that, don't want to repeat it...

I am sorry I don't quite follow.

Once before a missed paren's caused a TCP congestion window bug that
took 6 months before it was found...

-- 
Stephen Hemminger [off-list ref]