Re: Allocated aligned arrays

[Simon Wright <simon@pushface.org>]

"ldb" <louis@pittpatt.com> writes:

> These are the actual indicies I would use (it's an image processing
> algorithm that trims the edges). I'm not sure if the strange indices
> could be causing the problem, but I cannot imagine it is.
>
> However, the three matricies, input, sam, and bob aren't necessarily
> aligned (for certain input index ranges they are, by default, and some
> times they are not. The alignment statement I am using seems to have no
> effect).

A little experiment here shows that GCC 4.0.0 on Darwin seems to work
reasonably, but your problem is no doubt bigger.

What compiler/architecture? sounds like a bug to me -- I don't believe
a compiler is (should be!) allowed to accept a pragma like this and
then fail to honour it?

Note however RM 3.3(32):

   An implementation need not support specified Alignments that are
   greater than the maximum Alignment the implementation ever returns
   by default.