For any given (nested) procedure in MIPS we should be able to push and pop any variables it might want onto the stack and then restore them. Write a MIPS macro for Push and a second macro for Pop that would push 3 registers ($s0, $s1, $s2) onto the stack and then pop them off in the correct order. Your program doesnt need to actually do anything with those variables though. The stack pointer should be correctly restored at the end

Mips Assembly