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How to generate BFI & BFC instruction in C

Nandkishor Biradar

Hi friends,
I am using TI LM3s6965 micro controller.

I read the thumb-2 instruction set. Some instructions are interesting but as 'C' programmer I don't know how to write code to generate these instruction BFI, BFC.. etc

Is keil C compiler have special macro/function/syntax to generate these instruction??
Or some coding tricks??

Please suggest any application notes which demonstrate "How to write efficient C code for cortex-M3".

Thanks & Regards,
Kishore.

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