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Message-Id: <24FAB0C4-715B-4BF5-87E1-BA71C6548D7A@gmail.com>
Date: Sat, 18 Apr 2015 21:28:08 +0800
From: Lei Zhang <zhanglei.april@...il.com>
To: john-dev@...ts.openwall.com
Subject: Re: AVX512 support detection
> On Apr 18, 2015, at 5:33 PM, magnum <john.magnum@...hmail.com> wrote:
>
> Of those, I guess at least the following are not AVX512BW either:
>
> vcvtsi32 (currently used for SSE4.1 <= arch < AVX2)
It seems to be only available on SSE2. Even AVX2 doesn't support it.
> vmask2int (currently used for AVX512/MIC, no pseudo)
According to the intrinsics guide, it's only available on MIC. But I think there should be some alternatives on AVX512, otherwise the _mm512_cmp_epi*_mask intrinsic will be less useful.
> vpermute2x128 (not used at all, we can drop it)
> vpermute4x64_epi64 (not used at all, we can drop it)
No direct counterparts found.
BTW, we can also drop some other unused intrinsics, which might cause portability issues.
Lei
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