[vector] vector shift operations

[Adam Pocock]

Ooops, wrong intrinsic link. I mean vpsllvd, 
https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=epi&techs=AVX2&cats=Shift&expand=4933.

Adam

On 20/02/18 14:47, Adam Pocock wrote:
> I'm implementing Csuros approximate counters 
> (https://arxiv.org/abs/0904.3062) which have a data dependent shift in 
> them to recover the int value from the stored byte. I'd like to be 
> able to recover n ints from an array of n bytes using the Vector API, 
> but that requires left shifting each element of a vector of n ints by 
> a data dependent value from the vector of n bytes (encoded as ints for 
> simplicity).
>
> It looks like there is an instruction in AVX2 which does this from the 
> vpslld family 
> (https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=epi&techs=AVX2&cats=Shift&expand=4871). 
> Is there a roadmap somewhere for how much coverage the Vector API will 
> have over the wide space of intrinsics? Should we expect the API to 
> grow over time, or are the current operations the only ones which are 
> expected to be supported?
>
> Thanks,
>
> Adam
>

-- 
Adam Pocock
Principal Member of Technical Staff
Machine Learning Research Group
Oracle Labs, Burlington, MA