Digital BW, The Print

"royvharrington" <roy@...> writes:

> > 
> > > What C construct are you going to use to
> > > test the carry bit out of the last arithmetic add?  Write me the 
> code.
> > > If you prefer a different high level lang, use that.
> > 
> > That's up to the C compiler what it does.  Different C compilers 
> will do
> > different things with the same constructs.  You should know 
> that.
> > 
> 
> I know what C compilers do.  I want to know what YOU are going
> to give the C compiler to compile i.e. I want YOUR source
> code.  If you've written so much C code you ought to be able to 
> write
> a couple of lines of C code that adds 2 unsigned 16 bit numbers
> and forces the result to the maximum unsigned 16 bit number if 
> there is
> overflow.  I want ordinary C code that could be compiled on
> any computer with a C compiler on it and will work identically
> and correctly on every single one.

Heh.  I'd do the arithmetic in 32-bit and then test if the result
exceeded the 16-bit unsigned max and chop it if it did :-).  

Unless hardware or performance constraints mandated some other
approach anyway. 

From which you may deduce that that's not the sort of problem I spend
most of my time on; I fall back on the brute force approach when
possible. 
-- 
David Dyer-Bennet, dd-b@...  /  New TMDA anti-spam in test
 John Dyer-Bennet 1915-2002 Memorial Site http://john.dyer-bennet.net
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