There are 32 bit avrs.  Search for 'AVR32'.
"Alex_Dovhal" <alex_dovhal@yahoo.com> wrote in message news:jgggnk$2vev$1@digitalmars.com...
"Andrea Fontana" <advmail@katamail.com> wrote:
>Is it possible to compile for avr (atmel) platform using gdc? It would be interesting for arduino development...
 
AVR is 8-bit harward architecture while D is designed for at least 32 bits. Besides that AVR's have from (less then 1) to (a few) kB of RAM so it needs another standard library with no GC. Guess that's a lot of work, so don't expect it any time soon even if someone will try to implement it.