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update page to explain how to get rid of it

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Benoit Jacob 2009-09-18 22:01:49 -04:00
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doc/D11_UnalignedArrayAssert.dox
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@ -21,6 +21,7 @@ There are 4 known causes for this issue. Please read on to understand them and l
- \ref c3
- \ref c4
- \ref explanation
- \ref getrid
\section where Where in my own code is the cause of the problem?
@ -101,6 +102,16 @@ Eigen normally takes care of these alignment issues for you, by setting an align
However there are a few corner cases where these alignment settings get overridden: they are the possible causes for this assertion.
\section getrid I don't care about vectorization, how do I get rid of that stuff?
Two possibilities:
<ul>
<li>Define EIGEN_DONT_ALIGN. That disables all 128-bit alignment code, and in particular everything vectorization-related. But do note that this in particular breaks ABI compatibility with vectorized code.</li>
<li>Or define both EIGEN_DONT_VECTORIZE and EIGEN_DISABLE_UNALIGNED_ARRAY_ASSERT. This keeps the 128-bit alignment code and thus preserves ABI compatibility.</li>
</ul>
For more information, see <a href="http://eigen.tuxfamily.org/index.php?title=FAQ#I_disabled_vectorization.2C_but_I.27m_still_getting_annoyed_about_alignment_issues.21">this FAQ</a>.
*/
}