Stephen Kennedy writes:
> On Wed, 2004-06-09 at 20:44, Richard Henderson wrote:
> >
> > Has nothing to do with simd or not. Has everything to do
> > with POD or non-POD type.
>
> Ok, so if I have this correct, POD members padding may not be reused by
> derived classes but non-POD classes may have their padding reused.
>
> Why then is __m128 not considered a POD type? It is most natural to
> think of machine native register types as POD.
That's not what he said. If it's a derived class it's not POD, so the
compiler can pack any way it wants.