Re: [ft-devel] FT_MulDiv optimization

[Werner LEMBERG]

>>>> Well, at the same time it reduces the available range for `c' by
>>>> more than 50%.
>>>
>>> I was greedy with the space for a and b. With a + b < 2*46340
>>> instead, c can use the same old limit. We can expand c a lot further
>>> by making a+b only a bit smaller.
>> 
>> OK.  Another reason for a statistical analysis :-)
> 
> Not worth it.  If Alexei keeps a + b < 2*46340 then this is a clear
> improvement and needs no further analysis.

Hmm.  We have three variables (a, b, c) in the function, and Alexei's
patch increases the number of possible (a,b) pairs, and at the same
time it reduces the number of possible c values for the shortcut.  You
say that this is a good thing, but why?


    Werner