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Date: Sun, 26 Jul 2015 16:02:19 +0200
From: Agnieszka Bielec <bielecagnieszka8@...il.com>
To: john-dev@...ts.openwall.com
Subject: Re: PHC: Lyra2 vs yescrypt benchmarks 2
2015-07-26 15:58 GMT+02:00 Solar Designer <solar@...nwall.com>:
> Agnieszka,
>
> On Sun, Jul 26, 2015 at 03:40:18PM +0200, Solar Designer wrote:
>> On Sun, Jul 26, 2015 at 03:15:43PM +0200, Agnieszka Bielec wrote:
>> > I was thinking that it uses AVX2 becaues Lyra2 uses
>> > blake2b which has some instructions in SSE4_1
>>
>> Huh?! Do you understand how SSE2, SSE4.1, AVX, and AVX2 correspond to
>> each other and in what ways they differ? Can you please explain your
>> understanding to me, so that I see if it's correct or where exactly it
>> is wrong. You sound confused pretty badly here. Perhaps not enough
>> assembly output reading on your part. ;-)
>
> To clarify, I don't need a lot of detail from you - e.g., I am not
> asking you to list all extra instructions available with one of these
> that are not in another (although listing one or two particularly
> relevant instructions is OK). I just need a few sentences summarizing the
> relationship and main differences between these SIMD instruction sets.
my undestranding was that when intrinsic are in SSE2 but AVX is
avalialbe they are compiled to AVX, and similarly SSE4 -> AVX2
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