casting int to uint and vice versa - performance

[Michal Minich]

On Fri, 03 Dec 2010 16:44:42 -0500, Steven Schveighoffer wrote:

> On Fri, 03 Dec 2010 16:34:51 -0500, Michal Minich
> <michal.minich at gmail.com> wrote:
> 
>> What is performance overhead for casting value of type int to uint and
>> in the opposite direction. What happen when I cast int to int or uint
>> to uint
> 
> Nothing, there is no performance, type is strictly a compile-time
> concept.
> 
>> (for the simplicity in generic code). I suppose there is no difference,
>> and it is in fact no-op for processor - it depends only on
>> interpretation. Only when making other operations compiler may generate
>> different instruction when he considers some value of either of types.
>> Am I right?
> 
> Not sure what you mean by that last part...
> 
> -Steve

just that i + i generates different instructions than ui + ui where int 
i; uint ui;

Not really important, because I'm currently interested in cast only.

Thank you.