Forums - FastCV on Google Glass

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FastCV on Google Glass
s.fernando
Join Date: 21 Jul 14
Posts: 2
Posted: Fri, 2014-08-01 01:52

Hi,

I'm trying to use fastcv on the google glass.

1. Does the fastcv ARM library have NEON code for ARM A9 cores? When compiing there was an error saying the symbols are for ARM A8. Compiler error was fixed by adding the following line from the sample example. Is this just a hack? Or does it really support A9?

 LOCAL_LDFLAGS:= -Wl,--no-fix-cortex-a8

2. Fast has two implementations, one for ARM and one for snapdragon. Is it runtime detection and loading? Is there a way to verify that ARM version was loaded and is using the NEON acceleration?
 
Thanks
Cheers,
Shakith
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jeff4s Moderator
Join Date: 4 Nov 12
Posts: 106
Posted: Fri, 2014-08-01 11:21

Hi,

You need Snapdragon platform to run the NEON implementation of FastCV. For Question #1, if your application runs without problem, then obviously the compiler flag works, but it's likely to run the ARM implementation.

Cheers,

-Jeff

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s.fernando
Join Date: 21 Jul 14
Posts: 2
Posted: Sat, 2014-08-02 11:16

Sorry. Didnt get that clearly. So only the Snapdragon implementation contains the NEON acceleration?

What does the ARM implmentation contain? I would assume ARM CPU implementation contains NEON acceleration as well.

Is it limited to ARM A8?

Thanks.

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