Re: [q-lang-users] [Chicken-users] Re: IEEE float arithmetic

[Albert G. <Dr....@t-...>]

John Cowan wrote:
> Abdulaziz Ghuloum scripsit:
> 
>>Out of curiosity, why not simply do "f==1.0/0.0 || f==-1.0/0.0" to test
>>if f is +inf.0/-inf.0?
> 
> Umm.  Too obvious, I guess.  I started working these out in
> Chicken, where dividing by zero throws an exception, so I
> wanted some other method.  But in C, of course, there's no
> such issue.

But you want the code at least not to do any harm on systems with _no_ 
IEEE floats. I'm not sure, but couldn't dividing by 0.0 on such systems 
kill your program with SIGFPE?

Another point is that division is a much more costly operation than 
adding and subtracting.

BTW, should I cc the Chicken list in this thread?

-- 
Dr. Albert Gr"af
Dept. of Music-Informatics, University of Mainz, Germany
Email:  Dr....@t-..., ag...@mu...
WWW:    http://www.musikinformatik.uni-mainz.de/ag