RE: [GD-Windows] Data alignment...

[Gareth L. <GL...@cl...>]

Hi.

I'm not sure if vc7 comes with the proccecor pack built in, but if it
doesn't you should download it from Microsoft's site.

Then use the new __declspec (align) tags, and if needed use the
align_malloc() and align_free() functions.

Regards, Gareth Lewin

> -----Original Message-----
> From: Wayne Coles [mailto:wc...@re...]
> Sent: 25 January 2002 09:46
> To: 'gam...@li...'
> Subject: [GD-Windows] Data alignment...
> 
> 
> I've been doing some SSE optimisations lately using VC7. Does 
> anyone know of
> a built-in way of allocating data on 16 byte bounds (or 
> preferably user
> specified alignment)?
> 
> I've flagged the structure to be aligned on 16 bytes which works when
> declaring it, but not after calling new (I wouldn't expect 
> malloc to align,
> as it knows nothing of the type of allocation, but I thought 
> new would, ahhh
> I'm so naive :).
> 
> According to an intel doc, there is an intrinsic function 
> _mm_malloc which
> allows you to specify an alignment but VC7 doesn't have this 
> function nor
> can I find something similar.
> 
> I've resorted to writing my own _mm_malloc and overloading 
> operator new and
> delete. Just wondering if I missed something obvious and 
> wasted my time
> (this a home project, so waste of time isn't as bad but just 
> as irritating
> :).
> 
> Thanks,
> Wayne
> -Virus scanned and cleared ok
> 
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