[Bug manual/2516] typo in README.libm

["bruno dot roggeri at supelec dot fr" <sourceware-bugzilla at sourceware dot org>]

------- Additional Comments From bruno dot roggeri at supelec dot fr  2006-09-12 10:37 -------
(In reply to comment #2)
> Nope, your patch is wrong.  x is the value we want to compute square root of
> and it certainly doesn't need to be in the [1, 4) interval.
True.

> You either want to write:
>  *      find an integer k such that  1 <= (y=x*2^(-2k)) < 4, then
>  *              sqrt(x) = 2^k * sqrt(y)
> or
>  *      find an integer k such that  1 <= (y=x*2^(2k)) < 4, then
>  *              sqrt(x) = 2^(-k) * sqrt(y)
> 
I think I prefer the first option. Or maybe something like this is easier to read :
 *      find an integer k such that  1 <= (y=x/(2^2k)) < 4, then
 *              sqrt(x) = 2^k * sqrt(y)

(I removed the parenthesis around 2k in an attempt to reduce "parenthesis bloat" :)

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http://sourceware.org/bugzilla/show_bug.cgi?id=2516

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