Have you tested on SPARC? Otherwise, LGTM.

BTW, you should be able to attach labels. If not we need to increase your permissions.

Yes, I can apply labels - sorry - just didn't think to do it.

The SPARC machine I sometimes have access to is down at the moment, but I'm confident that the machine.platform() string does not start with 'ppc64'. In fact, on Debian, I happen to know it's 'sparc64' (https://github.com/nipy/nibabel/blob/master/nibabel/casting.py#L668) .

Oops, I meant on a PPC machine. For some reason I see Matthew and think SPARC...

:) - not sure how I feel about being Mr SPARC - but - I don't actually have access to a 'power' machine - I guess these were Mac G4s running OSX? This test does pass on a big-endian 'ppc64' machine running Debian.

Guess we'll put it out there and see if it helps, certainly looks straightforward. Thanks Matthew.