Development discussion of WireGuard
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From: Sebastian Gottschall <s.gottschall@newmedia-net.de>
To: wireguard@lists.zx2c4.com
Subject: Re: iOS WG (1.0.3) - ARM64 SIMD ChaCha20
Date: Wed, 20 Feb 2019 22:01:01 +0100	[thread overview]
Message-ID: <db2ff044-47ab-6050-338c-d81fc0ed0c0e@newmedia-net.de> (raw)
In-Reply-To: <A76D82AE-F12E-4E3E-906A-D34640E2DF4F@lonnie.abelbeck.com>


Am 20.02.2019 um 16:03 schrieb Lonnie Abelbeck:
> Thanks to Jason and the team, a new iOS WG 1.0.3 appeared as an update:
>
> 1.0.3 / Feb 19, 2019
> --
> Performance should be higher and battery usage lower, thanks to a new ARM64 SIMD implementation of ChaCha20
> --
> For reference, the upstream golang crypto commit is here [1] with performance numbers.
>
> So, the question come to mind, do my iOS devices have ARM64 SIMD support, quick answer is if the device is less than 6 years old it should have ARM64 SIMD support.  Added in the A5/A6 CPU's from what I can tell.

A5 and A6 is 32 bit. A7 was the first 64 bit cpu (introduced with Iphone 5s)

Sebastian

>
> Apple-designed processors
> https://en.wikipedia.org/wiki/Apple-designed_processors
>
> Please correct my research if I over-simplified where the new ARM64 SIMD implementation of ChaCha20 is available for iOS WireGuard.
>
> Lonnie
>
> [1] chacha20: add SIMD implementation on arm64
> https://go.googlesource.com/crypto/+/74369b46fc6756741c016591724fd1cb8e26845f
>
> _______________________________________________
> WireGuard mailing list
> WireGuard@lists.zx2c4.com
> https://lists.zx2c4.com/mailman/listinfo/wireguard
>
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  reply	other threads:[~2019-02-20 21:01 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-20 15:03 Lonnie Abelbeck
2019-02-20 21:01 ` Sebastian Gottschall [this message]
2019-02-21 16:03   ` Lonnie Abelbeck
2019-02-21 17:09     ` Sebastian Gottschall

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