Suppose you want to make a nested function call (i. e. a call to a function from inside of another function) using a jal rather than a call for performance reasons. How would the push and pop pseudo-ops be proprely ordered along with the jal so that the previous return address isn't lost?

a) pop $ra

jal nested_function_label

nop

push $ra

b) push $ra

jal nested_function_label

nop

pop $ra

c) push $ra

pop $ra

jal nested_function_label

nop

d) jal nested_function_label

nop

pop $ra

push $ra

Question

31 March, 09:05

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Answers (1)

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Patrick Wong · Answer 1

As we need to use a nested loop in our function, hence push $ra

pop $ra

jal nested_function_label

nop is the correct option.