[PATCH CGEN v1] cgen: Compute correct mask and values when offset in define-ifield is not 0.

[Frank Ch. Eigler]

Hi -

> Just to know if you have some comments to this patch :-)
> Thanks in advance.

Sorry, no fresh enough knowledge to offer informed commentary.  If
your regression tests on other platform indicated no problems, and
it solves a real problem with your arch, go for it.

- FChE