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how to check barnch miss predict

Note: This was originally posted on 3rd August 2009 at http://forums.arm.com

Hello,

I am doing coding in ARM- NEON Assembly on Cortex-A8 (ARMv7-a) architecture?

How to check that branch miss predict happened to avoid extra cycles?

Thanks,

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Peter Harris over 12 years ago

Note: This was originally posted on 3rd August 2009 at http://forums.arm.com

Cortex-A8 has 4 event count registers in addition to the cycle count register - see the Event Selection Register in CP15 for the various options.

[url="http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0204h/Bcfjicfj.html"]http://infocenter.arm.com/help/index.jsp?t...h/Bcfjicfj.html[/url]

Event '0x10' is the one you want.
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Peter Harris over 12 years ago

Note: This was originally posted on 3rd August 2009 at http://forums.arm.com

Cortex-A8 has 4 event count registers in addition to the cycle count register - see the Event Selection Register in CP15 for the various options.

[url="http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0204h/Bcfjicfj.html"]http://infocenter.arm.com/help/index.jsp?t...h/Bcfjicfj.html[/url]

Event '0x10' is the one you want.
Cancel
Vote up 0 Vote down

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