Re: [TLS] Salsa20 and Poly1305 in TLS

Ted Krovetz <ted@krovetz.net> Tue, 06 August 2013 16:20 UTC

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From: Ted Krovetz <ted@krovetz.net>
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Date: Tue, 6 Aug 2013 09:20:32 -0700
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To: Adam Langley <agl@google.com>
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Subject: Re: [TLS] Salsa20 and Poly1305 in TLS
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Adam,

Thanks a lot for taking the time to do these tests.

> On a Cortex-A8 (specifically a Galaxy Nexus) using Linaro GCC 4.7:

I'm a bozo. When I gave you the VMAC code using ARM intrinsics I should have explicitly reminded you to enable NEON when compiling:

  gcc -mcpu=cortex-a8 -mfpu=neon -mfloat-abi=hard

On a modern ARM, you should always use these settings so that your compiler uses the NEON unit when possible.

-Ted