Different sized data and code pointers

[E. Weddington]

Thomas Gill wrote:

>
> Hi all.
>
> I'm working on a GCC backend for a small embedded processor. We've got a
>  Harvard architecture with 16 bit data addresses and 24 bit code
> addresses. How well does GCC support having different sized pointers for
> this sort of thing? The macros POINTER_SIZE and Pmode seem to suggest 
> that there's one pointer size for everything.
>
> The backend that I've inherited gets most of the way with some really
> horrible hacks, but it would be nice if those hacks weren't necessary. 
> In any case, the hacks don't cope with casting function pointers to 
> integers.
>
I too would be interested in different size pointer support as this may 
be needed to further improve the AVR port (add new bigger devices).

Eric