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#Actualfrob

Posted 29 August 2013 - 11:32 AM

I assume you already know this but better to double check.

 

The NEON and VFP registers alias the same hardware. Switching modes requires a pipeline flush. Developers using NEON code should do all of it in batch and ensure no VFP instructions are interleaved.

 

That said, my guess is that it will do two sequential 64-bit-parallel operations internally. 


#1frob

Posted 29 August 2013 - 11:30 AM

I assume you already know this but better to double check.

 

The NEON and VFP registers alias the same hardware. Switching modes requires a pipeline flush. Developers using NEON code should do all of it in batch and ensure no VFP instructions are interleaved.

 

That said, my guess is that it will do two sequential 64-bit operations internally. 


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