On Fri, Dec 5, 2008 at 9:45 AM, <tiberipa@xxxxxxxxxxxxxxx> wrote:
>
> I all,
>
> I have the following code:
>
> struct
> {
> float v[25] __attribute__((align(16)));
> }
>
> the size of this struct is 28*4.
>
> Is there a rule (documented somewhere) in gcc which says that the
> size of a struct with aligned attributes is a multiple of the required
> alignment (in this case 16)?
It is a requirement of the C specification. If you were to create an
array of these structures, each structure has to be aligned. Hence,
the structure size has to be a multiple of the required alignment.
