What pipe does VBROADCASTSD go down? I looked in the latency/throughput section of the intel optguide and it doesn't list this information. Thanks perfwise
what FPU pipe does VBROADCASTSD go down?
Gio, 05/04/2012 - 07:30
what FPU pipe does VBROADCASTSD go down?
Per informazioni complete sulle ottimizzazioni del compilatore, consultare l'Avviso sull'ottimizzazione
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Ven, 06/04/2012 - 18:38
I haven't heard which pipe it goes down but from my assembly performance it surely isn't pipe 0 or 1 where the 256-bit add and mul units are. Thought I'd let people know..
perfwise
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Dom, 10/02/2013 - 21:55
>>>I haven't heard which pipe it goes down but from my assembly performance it surely isn't pipe 0 or 1>>>
Do you mean execution unit's Port?
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Mar, 12/02/2013 - 06:13
Yes, but it's a moot point now. I was tuning my dgemm for SB and IB and noticed some "replication" instructions utilized the same pipe as the + or *, can't remember off the top of my head. vbroadcastsd doesn't and is preferrable for this purpose.
perfwise
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Mar, 12/02/2013 - 07:32
I suppose that store/load Ports 2 and 3 are executing VBROADCASTSD instruction.