$1.$ Write a main program, testcalc.c $($this program will contain the main$()$function$),$ that will test calc.c$.($hint: testcalc.c file will use the function calc$()$ defined in

calc.c$)$

$$

The main program should declare three int variables, x$,$ y$,$ and z$,$ and initialize them to $5,7,$ and $13,$ respectively. It should then call calc with these parameters and print x$,$ y$,$ z$,$ and the result using the format specification:

$"$x$=\%$d$,$ y$=\%$d$,$ z$=\%$d$,$ result$=\%$d

$".$

$$

Before running the program, answer the following question:

a$)$ What output should be generated by this program?

b$)$ The program will need a prototype of the function calc. Compile your program with:

cc $-$O$1-$o testcalc testcalc.c calc.s

Test your program by running the binary testcalc to make sure that it works correctly. Turn in the file testcalc.c$.$

# Function: int calc$($int x$,$ int y$,$ int z$)$

# This function calculates: x $+3*$y $+19*$z

# Parameters:

#$$ x $->$ First argument $($offset $8(\%$ebp$))$

#$$ y $->$ Second argument $($offset $12(\%$ebp$))$

#$$ z $->$ Third argument $($offset $16(\%$ebp$))$

# Return value: The result of the calculation is stored in $\%$eax.

$$

$.$globl calc$$

calc:

$$ pushl$\%$ebp$$

$$ movl$\%$esp, $\%$ebp$$

$$

$$ movl$8(\%$ebp$),\%$eax$$

$$ movl$12(\%$ebp$),\%$ecx$$

$$ movl$16(\%$ebp$),\%$edx$$

$$

$$ leal$(\%$ecx, $\%$ecx, $2),\%$ecx$$

$$

$$ # Calculate $19*$ z

$$ leal$(\%$edx, $\%$edx, $2),\%$edx$$

$$ leal$(\%$edx, $\%$edx, $4),\%$edx$$

$$ addl$\%$edx, $\%$edx$$

$$

$$ # Add x $+(3*$ y$)$

$$ addl$\%$ecx, $\%$eax$$

$$

$$ # Add x $+(3*$ y$)+(19*$ z$)$

$$ addl$\%$edx, $\%$eax$$

$$

$$ # Function Epilogue

$$ popl$\%$ebp$$

$$ ret$$

$$

pushl$\%$ebp$$

movl$\%$esp, $\%$ebp$$

$$

movl$8(\%$ebp$),\%$eax$$ # Load the first argument $($x$)$ into the $\%$eax register.

movl$12(\%$ebp$),\%$ecx # Load the second argument $($y$)$ into the $\%$ecx register.

movl$16(\%$ebp$),\%$edx # Load the third argument $($z$)$ into the $\%$edx register.

$$

$$

leal$(\%$ecx, $\%$ecx, $2),\%$ecx$$ # Compute $3*$ y by adding y $+2*$y$,$ store in $\%$ecx.

$$

$$

leal$(\%$edx, $\%$edx, $2),\%$edx$$ # Compute $3*$ z$.$

leal$(\%$edx, $\%$edx, $4),\%$edx$$ # Compute $15*$ z by adding $3*$z $+12*$z$.$

addl$\%$edx, $\%$edx$$ # Compute $19*$ z by adding $15*$z $+4*$z$.$

$$

$$

addl$\%$ecx, $\%$eax$$ # Add $3*$ y to x $($store in $\%$eax$).$

addl$\%$edx, $\%$eax$$ # Add $19*$ z to the result $($store in $\%$eax$).$

$$

$$

popl$\%$ebp$$ # Restore the old base pointer.

ret$$ # Return the result, which is now in $\%$eax.