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GNU/IAR portmacro.h

Posted by joelw on September 19, 2007
The GNU version implements:
#define portENTER_SWITCHING_ISR()
#define portEXIT_SWITCHING_ISR( SwitchRequired )

What are the IAR equivalents for these?

Thanks,
Joel

RE: GNU/IAR portmacro.h

Posted by joelw on September 19, 2007
I have some thick blinders on at the moment, please disregard the above.

Is there a benefit code/speed wise in how the IAR ports are implemented over the GCC?

For example the use of intrinsics.

Has someone done any cycle measurements between the two?

I like the generic implementation of the GCC port, I would just like to be sure I'm not giving myself a performance hit.


Thanks,
Joel

RE: GNU/IAR portmacro.h

Posted by Richard on September 19, 2007
Are the two not nearly the same? The GCC version is slightly different as interrupt routines are defined completely within C files, and therefore the context is saved/restored in the macro. The IAR inline assembler is not as powerful and requires an asm wrapper to save and restore the context.

Regards.

RE: GNU/IAR portmacro.h

Posted by joelw on September 19, 2007
I'm tasked to merge the two (GCC/IAR) into a single port. Just looking for insight beyond the obvious.

Joel


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