[Gm2] Re: data alignment is now possible

[SiTex Graphics]

Thanks.  That will be handy.

I see now that my original question was poorly worded.  What I was
really after is a way to pack fields in a record as tightly as
possible.  Both XDS and StonyBrook have a global option for that.
Here's a simple example (source code attached).  With the following
type declaration:

  Test = RECORD
    a : CARDINAL8;
    b : CARDINAL32;
    c : CARDINAL8;
  END;

GM2 reports SIZE(Type) as 12, whereas StonyBrook and XDS report 6 with
packed field alignment.  With the other compilers changing the field
alginment does not require modificiation of the source code, and that
would be highly desirable. Maybe there's already a gcc-based
command-line option for field alignment?

In any case the ability to specify variable alignment will be useful
in its own right.

Thanks,
Scott


On Tue, Jun 15, 2010 at 2:35 PM, Gaius Mulley <address@hidden> wrote:
>
> On Thu, 8 Oct 2009 19:15:32 -0400 Scott wrote:
>
>> Another question:  is there a way to specify the data alignment of a
>> record type?
>
> Hi Scott,
>
> yes, this is now implemented in the latest cvs!  I've checked in some
> alignment regression tests and they all pass, these examples are also
> in the documentation to give an idea of how they might be used:
>
> http://www.nongnu.org/gm2/gm2.html#SEC27
>
> regards,
> Gaius
>

size.mod
Description: audio/mod