size of struct with aligned attributes

[tiberipa@xxxxxxxxxxxxxxx]

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)?

note that if I declare the following :

struct
{
  float v[25] __attribute__((align(32)));
}

the size of this is a multiple of 32.

Paolo.