[PD-dev] pdp's mmx support

Hans-Christoph Steiner hans at eds.org
Mon Oct 29 20:21:53 CET 2007


On Oct 29, 2007, at 3:10 PM, IOhannes m zmoelnig wrote:

> Hans-Christoph Steiner wrote:
>>
>> Well, AFAIK, there is no further development on MMX, while there  
>> is with
>
> there is: it is called SSE
>
>> SSE.  And it seems that SSE is meant to replace MMX, instead of  
>> complement it.  Plus if IIRC, MMX has some serious drawbacks to  
>> it.  It
>
> i don't know of any "drawbacks" of MMX.

One I know of is that is takes 50 cycles to switch from the FP unit  
to the MMX unit.

>> seems to be something like SSE v0 ;)
>
> as said above: it is (imho)
>
> still i don not see any "deprecation" in this.
> afaik, every processor that supports SSE3 (or whatever is current)  
> also supports MMX.
> i have never read anything like "it seems you are running MMX;  
> please consider upgrading to SSE2" to the like
>
> mfg.asdr
> IOhannes

Here's the question:

Do MMX and SSE have different instruction sets?  If so, is SSE  
preferred over MMX?

.hc

------------------------------------------------------------------------ 
----

Mistrust authority - promote decentralization.  - the hacker ethic






More information about the Pd-dev mailing list