"interrupt" keyword and C6748 registers saving

lavenu patrick1

Hello,

I 'm using "interrupt" keyword in C and watched the generated code for a C6748 with CGT 7.4.12. i noticed that registers from A10 to A15 and B10 to B15 were never saved and so never restored.

Could someone explain me why ?

Is the keyword "interrupt" generate always the same code for the registers saving or it depends of which registers are going to be change in the interrupt fonction ?

Thank you very much in advance for your answer.

Best Regards.

Pat.

over 11 years ago

0 George Mock over 11 years ago

TI__Guru**** 253270 points

lavenu patrick1 said:
or it depends of which registers are going to be change in the interrupt fonction ?

That's it. The only registers preserved are those which are changed..

Thanks and regards,

-George

0 lavenu patrick1 over 11 years ago in reply to George Mock

Intellectual 600 points

Thank you very much for your answer.

Is it to say that the" interrupt" keyword doesn't generate always the same asm code and that it depends of what is going to be change in the interrupt function ? could you confirm that ?

Thank you very much.

Regards,

Pat.

0 George Mock over 11 years ago in reply to lavenu patrick1

TI__Guru**** 253270 points

lavenu patrick1 said:
Is it to say that the" interrupt" keyword doesn't generate always the same asm code and that it depends of what is going to be change in the interrupt function ?

Yes. -George

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"interrupt" keyword and C6748 registers saving