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Can Cortex A8 NEON optimized code work on Cortex A5 NEON?

zhongl over 4 years ago

I have a library which is optimized for ARM Cortex A8 equipped devices, it heavily utilized the NEON VFPU, can the same code run on Cortex A5 devices with NEON? If not, any guide to make it run on Cortex A5?

Thanks in advance!

Zhong

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Zhifei Yang over 4 years ago +2 verified

Both Cortex-A8 and Cortex-A5 are Armv7-A architectural processors. The NEON instructions are similar. However, Cortex-A5 can support those options: No FPU or NEON support FPU only with FPU and...
zhongl over 4 years ago in reply to Zhifei Yang +1

Thanks, Zhifei !
Zenon (Zhilong) Xiu over 4 years ago +1 verified

Cortex-A8 and Cortex-A5 are based on the same architecture, A8 NEON code can run on Cortex-A5, but it might produce different performance gains.

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0 zhongl over 4 years ago in reply to Noradavis

Hi Noradavis,

So based on your assumption, the same NEON code can run on Cortex-A5 and generate right result, besides it has some performance penalty.

Is my understanding right?

Thank you,

Zhong
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0 zhongl over 4 years ago in reply to Noradavis

Hi Noradavis,

So based on your assumption, the same NEON code can run on Cortex-A5 and generate right result, besides it has some performance penalty.

Is my understanding right?

Thank you,

Zhong
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