Re: [MiNT] gcc-code-generation

["Helmut Karlowski" <helmut.karlowski@ish.de>]

Am 20.01.2010, 21:13 Uhr, schrieb Vincent Rivière  
<vincent.riviere@freesbee.fr>:

> Interesting !

Yes!

> So GCC assume the stack can never be odd.

And is wrong. It did not do this always, but I couldn't see any system in  
it.

> With GCC 4.4.2, the test is never checked, even without -O.

Interesting!

So when someone wants to trace the alignment, an extra function is needed.

unsigned short check_alignment( unsigned long e )
{
  if( e & 1 )
    return 1;
  if( e & 2 )
    return 2;
  return 4;
}

This works.

> NB: Compile with -fomit-frame-pointer to get rid of these useless  
> link/unlnk.

I know, and already did it, looks better ..

--
Helmut Karlowski