[sldev] SSE2 / Ouch

[Dirk Moerenhout]

Well I already noted in a previous mail I wasn't convinced that it
would be safe to do it this way as everything you include gets handled
with the same architecture. So you really need to go over all your
includes in there and look what exactly you are doing and what the
global impact will be.

I guess the issue is that we have this:
static LLV4Matrix4	sJointMat[32];

That initialisation will probably use SSE.

You can't just move that elsewhere because then no SSE code would be
generated (as there's  #if LL_VECTORIZE in there).

Tricky :) I suppose you can drop the static but it'll likely have
performance impact and I'm not sure it's enough to stop MSVC from
bleeding SSE instructions over to unexpected areas.

Dirk aka Blakar Ogre


On 7/9/07, Nicholaz Beresford <nicholaz at blueflash.cc> wrote:
>
> Dunno if it's true, but if it is (and this guy sounds like
> he knows what he's talking about), it's a definite "OUCH!"
> and explains a lot of reports about crashing on startup.
>
> https://jira.secondlife.com/browse/VWR-1610
>
>
>
>
> Nick
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