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Re: Alpha vs. new ABI


On Jan 30, 2001, Jeff Sturm <jeff.sturm@appnet.com> wrote:

> Per Bothner wrote:
>> Would it work to add a dummy field:
>> 
>> jdouble dummy[0];
>> 
>> before the data field?

> Probably.  I first tried "jint pad;" which gave the right answer.  But
> it seems that jdouble alignment is wrong for 32-bit hosts.  How about:

> jobject dummy[0];

jobject isn't correct either for a platform that has 32-bits pointers
but 64-bit doubles that must be 64-bit aligned.

I think the correct solution is:

union { jobject align_object; jdouble align_double; jlong align_long;
        T data; } data[0];

-- 
Alexandre Oliva   Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer                  aoliva@{cygnus.com, redhat.com}
CS PhD student at IC-Unicamp        oliva@{lsd.ic.unicamp.br, gnu.org}
Free Software Evangelist    *Please* write to mailing lists, not to me

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