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Architectures and Processors forum Arm Neon not vectorising nested loop

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Arm Neon not vectorising nested loop

Syed Zabi over 7 years ago

Hi,

I am using A9 Processor on Zynq Board running a test project with neon and simd options enabled . In my code i have nested loops which is not vectorised and below is the build log

not vectorized: multiple nested loops.

Can anyone help me on this

Thanks in Advance

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42Bastian Schick over 7 years ago +1 verified

I think it is obvious. Your compiler (which?) cannot vectorize if you have nested loops. So try unrolling the outer loops. Maybe also re-arrange loops.

+1 42Bastian Schick over 7 years ago

I think it is obvious. Your compiler (which?) cannot vectorize if you have nested loops. So try unrolling the outer loops. Maybe also re-arrange loops.
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