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Message-ID: <f3a2835b4169f280e25f2c8bae7d8b24@smtp.hushmail.com>
Date: Sat, 5 Sep 2015 20:48:13 +0200
From: magnum <john.magnum@...hmail.com>
To: john-dev@...ts.openwall.com
Subject: Large stack alignment (was: Re: MD5 on XOP, NEON, AltiVec)
On 2015-09-05 04:47, Solar Designer wrote:
> Guess not confirmed. We use buffers on the stack, and they are properly
> aligned for 128-bit SIMD. This is unreliable for AVX2 and above, though.
Are you sure it's unreliable? As far as I can google it, gcc had
problems with large alignments but it was fixed long before 4.7, which
is the minimum version you need to even build for AVX2.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=16660
http://stackoverflow.com/questions/841433/gcc-attribute-alignedx-explanation
magnum
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