AVR indirect_jump addresses limited to 16 bits

[Giovanni Bajo]

Paul Schlie <schlie@comcast.net> wrote:

> - Sorry, I'm confused; can you give me an example of legal C
>   expression specifying an indirect jump to an arbitrary location
> within a function?


It is possible in GNU C at least:

int foo(int dest)
{
   __label__ l1, l2, l3;
   void *lb[] = { &&l1, &&l2, &&l3 };
   int x = 0;

   goto *lb[dest];

l1:
   x += 1;
l2:
   x += 1;
l3:
   x += 1;
   return x;
}

I would not design a backend so that such a feature is deemed to be impossible
to support.

Giovanni Bajo