Neon support for basic matrix operations

asked 2017-10-22 06:28:18 -0600

NadavB
21 ●2 ●2

Is there a Neon support for add/subtract operations? If not, is there a plan to add such support?

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if you build WITH_NEON, it will use carotene in a lot of places. just grep a bit.

berak ( 2017-10-22 09:04:49 -0600 )edit

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answered 2017-10-22 08:59:51 -0600

matman
1001 ●6 ●16

updated 2017-10-22 09:09:52 -0600

Neon seems to be supported (see here). Currently there are some pull requests like this which replaces explicit Neon and SSE operations with OpenCV's vector wrapper which saves double work.

So to answer your question: As far as I can see there should be Neon support for most arithmetic functions, because with the use of OpenCV's vector wrapper Neon support will be added automaticly.

Edit: Some wrong linkings fixed.

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Can you understand from the code if Neon is supported for when two matrices are added?

NadavB ( 2017-10-22 09:21:01 -0600 )edit

This code is currently a mixture of using SSE, Neon and the wrapper interface as well as using functors. I try to give you the chain when calling cv::add.

So Neon should be used for adding two matrices, except for double.

matman ( 2017-10-22 10:35:11 -0600 )edit

Thanks. The strange thing is that when I set cv::setUseOptimized(false) at the beginning of my code, I don't see any performance change, which makes me wonder of the implementation of the optimization in the first place...

NadavB ( 2017-10-24 14:04:03 -0600 )edit

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Neon support for basic matrix operations

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