Good idea to use SPECIES_512?

[Stefan Reich]

Hi Sandhya, thanks. I was assuming you might emulate the 512 bit
instructions using multiple 256 bit registers, but I understand I was wrong
and that is probably too complicated.

Greetings

On Mon, 11 Jan 2021 at 22:56, Viswanathan, Sandhya <
sandhya.viswanathan at intel.com> wrote:

> Hi Stefan,
>
> We don’t recommend using SPECIES_512 on non-avx 512 platforms.
> If the vector length exceeds the vector size supported by the platform, we
> don't generate the underlying SIMD instructions.
>
> Best Regards,
> Sandhya
>
> -----Original Message-----
> From: panama-dev <panama-dev-retn at openjdk.java.net> On Behalf Of Stefan
> Reich
> Sent: Saturday, January 09, 2021 10:07 AM
> To: panama-dev at openjdk.java.net' <panama-dev at openjdk.java.net>
> Subject: Good idea to use SPECIES_512?
>
> Just a quick question. Do you recommend using SPECIES_512 even on non
> AVX-512 CPUs? It will make some algorithms a lot simpler, but is it the
> fastest way?
>
> Greetings,
> Stefan
>
> --
> Stefan Reich
> BotCompany.de // Java-based operating systems
>


-- 
Stefan Reich
BotCompany.de // Java-based operating systems