Procedure calls

Given the following C program and the mapping of registers to variables, complete the ARM implementation of Main. Do not implement return $0$; in main$().$

int Dif$($int a$,$ int b$)\{$

return a $-$ b;

$\}$

int Sum$($int a$,$ int b$)\{$

return a $+$ b;

$\}$

int main$()\{$

int x$,$ y;

w $=$ Sum$($x$,$ y$)$;

z $=$ Dif$($y$,$ x$)$;

return $0$; $//$ Do not implement

$\}$Main:

$//$ Type your code here.

B End

$//$ Procedure Sum $($Do not modify$)$

Sum:

ADD X$2,$ X$0,$ X$1$

BR X$30$

$//$ Procedure Dif $($Do not modify$)$

Dif:

SUB X$2,$ X$0,$ X$1$

BR X$30$

End: