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Re: SSE types and structures
- From: Jan Hubicka <jh at suse dot cz>
- To: Richard Henderson <rth at redhat dot com>, Jan Hubicka <jh at suse dot cz>,gcc at gcc dot gnu dot org, gcc-bugs at gcc dot gnu dot org, bernds at redhat dot com,jakub at redhat dot com
- Date: Thu, 13 Jun 2002 18:40:09 +0200
- Subject: Re: SSE types and structures
- References: <20020528124507.GM7082@atrey.karlin.mff.cuni.cz> <20020528085123.B3044@redhat.com> <20020613163501.GJ19137@atrey.karlin.mff.cuni.cz> <20020613093836.A3058@redhat.com>
> On Thu, Jun 13, 2002 at 06:35:01PM +0200, Jan Hubicka wrote:
> > Should I align MMX types to 64bit even when doubles are 32bit aligned?
>
> Probably.
>
> > If so, how can I track down easilly from what the alignment comes from.
> > Can I rely on fact that field is not record/union? Probably not.
>
> Huh?
If I get the type and computed alignment to be 64 or 128, how can I
easilly figure out whether this comes from double/long double and thus
should be lowered to 32 for ABI compatibility, or from MMX/SSE
Honza
>
>
> r~