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- To: eigen@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [eigen] HouseholderQR bug??
- From: Hauke Heibel <hauke.heibel@xxxxxxxxxxxxxx>
- Date: Mon, 26 Apr 2010 13:56:29 +0200
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For me
MapBase< Map< Matrix<double,1,Dynamic,1,1,Dynamic>,0, Stride<0,0> >
>::checkSanity()
is failing and there it seems as if alignment is required.
- Hauke
On Mon, Apr 26, 2010 at 1:48 PM, Benoit Jacob <jacob.benoit.1@xxxxxxxxx> wrote:
> Map does not assume aligned by default. Unless you pass the Aligned
> option, the pointer is not required to be aligned.
>
> Benoit
>
> 2010/4/26 Hauke Heibel <hauke.heibel@xxxxxxxxxxxxxx>:
>> Hi,
>>
>> I am trying to trace down the std::vector issue and stumbled over the following.
>>
>> In HouseholderQR line 220, applyHouseholderOnTheLeft(...) is called
>> with this raw pointer
>>
>> &m_temp.coeffRef(k+1)
>>
>> which is mapped as
>>
>> Map<typename ei_plain_row_type<PlainObject>::type> tmp(workspace,cols());
>>
>> and results in unaligned data because even if m_temp is aligned,
>> m_temp.getData()+1 is not necessarily.
>>
>> How do we fix this? This does not help - I always thought it were
>> affecting the Flags property
>>
>> Map<typename ei_plain_row_type<PlainObject>::type, Unaligned>
>> tmp(workspace,cols());
>>
>> - Hauke
>>
>>
>>
>
>
>