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What does mean "-" for latency?

joonywie
Beginner
705 Views
What does mean "-" for latency?
 
ex)
__m512i _mm512_permutexvar_epi16 (__m512i idx, __m512i a)
 
Architecture Latency Throughput (CPI)
Icelake - 1
Skylake 6 2

 

i heard that "-" means 0 or unmeasurable(lesser than 6 or greater than 6?).

 

is this instruction improved or what?

 

thanks

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HemanthCH_Intel
Moderator
575 Views

Hi,


Could you please check the latency of the Intrinsics from the below link by using the Instruction of the intrinsic:

https://uops.info/table.html


Thanks & Regards,

Hemanth


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5 Replies
HemanthCH_Intel
Moderator
665 Views

Hi,


Thank you for posting in Intel Communities.


We are working on this internally and will get back to you soon.


Thanks & Regards,

Hemanth


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Thorax581
Beginner
603 Views

Any update on this?  I too would like to know the answer as a number of intrinsics I'm using have a latency of "-".  Thanks.

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HemanthCH_Intel
Moderator
576 Views

Hi,


Could you please check the latency of the Intrinsics from the below link by using the Instruction of the intrinsic:

https://uops.info/table.html


Thanks & Regards,

Hemanth


joonywie
Beginner
570 Views

I heard that site from the intel engineer just before.

Thanks for helping me.

 

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HemanthCH_Intel
Moderator
564 Views

Hi,


Glad to know that your issue is resolved. If you need any additional information, please post a new question as this thread will no longer be monitored by Intel.


Thanks & Regards,

Hemanth


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