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Which registers are reserved for passing the parameters to a subroutine and then returning the final result?

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in Microcontroller by (14.6k points)
Which registers are reserved for passing the parameters to a subroutine and then returning the final result?

(a) R1-R4

(b) R4-R11

(c) R12-R15

(d) All of the mentioned

I got this question in an interview.

The doubt is from Functions and Subroutine in section MSP430 Microcontroller of Microcontroller

1 Answer

0 votes
by (24.2k points)
Correct option is (c) R12-R15

For explanation I would say: Originally, R12-R15 registers are reserved for passing the parameters to a subroutine and then returning the final result.

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