Read info below starting: only use commands provided, $($No MOV or CMP for example$)$ :

Hint: Use $x00,x1$ as arguments and X $2$ as return value, according to the convention for procedure calling.

Ex: If the values of X$19$ and X$20$ are initialized in the simulator as:

the result is stored in $$s2$ :

Note: Use the $\text{'}+\text{'}$ button under the Registers display to initialize register values for X$19$ and X$20.$ Note: Use the $\text{'}+\text{'}$ button under the Registers display to initialize register values for X$19$ and X$20.$

Assembly Note: Use the $\text{'}+\text{'}$ button under the Registers display to initialize register values for $x19$ and X$20.$

Load default template...

AssemblyNote: Use the $\text{'}+\text{'}$ button under the Registers display to initialize register values for X $19$ and X $20.$

$593924\mathrm{.}3663848.$qx$3$zqy$7$This zyLab platform supports the following LEGv$8$ instructions:

Arithmetic: ADD, ADDS, ADDI, ADDIS, MUL, SDIV, SUB, SUBS, SUBI, SUBIS

Data transfer: LDURB, LDUR, LDURH, LDURSW, MOVK, MOVZ, STURB, STUR, STURH, STURW

Logical: AND, ANDI, EOR, EORI, ORR, ORRI, LSL$,$ LSR

Conditional branch: B$.$HS$,$ B$.$LO$,$ B$.$EQ$,$

B$.$GT$,$

B$.$GE$,$ B$.$HI$,$

B$.$LT$,$ B$.$LE$,$

B$.$LS$,$ B$.$MI$,$

B$.$NE$,$

B$.$VC$,$B$.$VS$,$

B$.$PL$,$ CBZ$,$ CBNZ

Unconditional jump: B$,$ BL$,$ BR

This zyLab platform supports the following LEGv$8$ instructions:

Arithmetic: ADD, ADDS, ADDI, ADDIS, MUL, SDIV, SUB, SUBS, SUBI, SUBIS

Data transfer: LDURB, LDUR, LDURH, LDURSW, MOVK, MOVZ, STURB, STUR, STURH, STURW

Logical: AND, ANDI, EOR, EORI, ORR, ORRI, LSL$,$ LSR

Conditional branch: B$.$HS$,$ B$.$LO$,$ B$.$EQ$,$

B$.$GT$,$

B$.$GE$,$ B$.$HI$,$

B$.$LT$,$ B$.$LE$,$

B$.$LS$,$ B$.$MI$,$

B$.$NE$,$

B$.$VC$,$B$.$VS$,$

B$.$PL$,$ CBZ$,$ CBNZ

Unconditional jump: B$,$ BL$,$ BR $11\mathrm{.}10$ LAB: Nested procedures

Given the following C program and the mapping of registers to variables, complete the ARM implementation of procedure Sum.

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

return b $-$ a;

$\}$

int Sum$($int m$,$ int n$)\{$

int p $=$ Dif$($n$+1,$ m$-1)$;

int q $=$ Dif$($m$+1,$ n$-1)$;

return p $+$ q;

$\}$

int main$()\{$

int x$,$ y;

z $=$ x $+$ y $+$ Sum$($x$,$ y$)$;

return $0$;

$\}$

Hint: Use $x0,x1$ as arguments and X $2$ as return value, according to the convention for procedure calling.