| Re: [eigen] Eigen on an arm core |
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- To: eigen@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [eigen] Eigen on an arm core
- From: Daniel Stonier <d.stonier@xxxxxxxxx>
- Date: Sun, 9 Aug 2009 02:49:07 +0900
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I just got pulled into a project they have been hammering away at for
a while. Unfortunately its a bit of chaos. They're not really clued
into programming on linux and are trying to do something non-trivial.
Lots of fun!
Seems as though they're doing the msproject style and bundling every
library and its kitchen sink with the project, so the eigen is a bit
old.
Toolchain is a generic gcc toolchain for arm developed by samsung.
Version is 2.0.0.
I'll update now and let you know how it goes.
Cheers,
Daniel.
2009/8/9 Benoit Jacob <jacob.benoit.1@xxxxxxxxx>:
> With Eigen >= 2.0.1 and the GCC compiler, indeed we disable all
> special alignment code, so we also disable this assertion, that's why
> you don't have this issue.
>
> As long as we don't do vectorization on a certain platform, there's no
> need to bother at all about alignment. That's why the solution to
> David's problem is as simple as: either upgrade to Eigen >= 2.0.1 (if
> he's using GCC) or tell us what compiler you're using and how to port
> the platform check.
>
> FYI the platform check is at Eigen/src/Core/util/Macros.h line 44 (in
> the 2.0 branch). We need to know how to detect your compiler, and how
> to detect the CPU architectures listed there, on this compiler.
>
> Cheers,
> Benoit
>
> 2009/8/8 Thomas Capricelli <orzel@xxxxxxxxxxxxxxx>:
>>
>>
>> Hello,
>>
>> I can't help you there, but I often test my project on ARM (and MIPS, sparc32,
>> ppc32, x86, amd64) and i don't have this kind of problem. I'm using eigen
>> trunk or 2.0.3, gcc 4.3.2/4.4.3 . Maybe we don't use the same features of
>> eigen though.
>>
>> "Testing" here means "compile and do some unit tests"
>>
>> regards,
>> Thomas
>>
>> In data sabato 08 agosto 2009 19:13:31, Daniel Stonier ha scritto:
>>> We threw eigen at an arm core recently running a SLAM algorithm and
>>> ignorantly discovered we were completely unknowing about alignment
>>> issues!
>>
>> --
>> Thomas Capricelli <orzel@xxxxxxxxxxxxxxx>
>> http://www.freehackers.org/thomas
>>
>>
>>
>
>
>