Hardware Traps for Integer Overflow

[Marco Leise via Digitalmars-d]

Am Thu, 29 May 2014 20:10:13 +0000
schrieb "John Colvin" <john.loughran.colvin at gmail.com>:

> On Thursday, 29 May 2014 at 20:01:25 UTC, Tobias Pankrath wrote:
> > On Thursday, 29 May 2014 at 15:32:54 UTC, Wanderer wrote:
> >> I don't see any valid alternatives. What should ideally happen 
> >> if you increment 0xFFFF..FFFF? Should the value remain the 
> >> same?
> >
> > I know at least one firmware running in cars from several 
> > manufacturers where
> > this is the desired behavior in dozens of places. Saturated 
> > arithmetic is common.
> >
> > (I'm not saying it should be the default)
> 
> There are dedicated instruction in more recent versions of SSE 
> for saturated arithmetic.

Actually  such instructions exist since MMX on Intel CPUs. The
question is: Can these new SSE instructions replace integer
math seemlessly?

-- 
Marco