Please help me make my algorithm more efficient to reduce the runtime error $($max is $10$ minutes$).$ Right now, all my test cases pass except for large positive values. The below code has to be a program not a function!!

$//$ Calculates a $=$ x $*$ y

$//$ a is a local variable

$//$ x & y are static variables

$//$ Initialise local variable a to $0$

push constant $0$

pop local $0$

$//$ Load x and y into temp variables

push static $0$

pop temp $0//$ temp $0=$ x

push static $1$

pop temp $1//$ temp $1=$ y

$//$ Calculate if result will be negative

push temp $0$

push constant $0$

lt

push temp $1$

push constant $0$

lt

eq

not

pop temp $2//$ temp $2=1$ if result should be negative, else $0$

$//$ Take absolute value of x

push temp $0$

push constant $0$

lt

if$-$goto MAKE$\_$X$\_$POSITIVE

goto X$\_$IS$\_$POSITIVE

label MAKE$\_$X$\_$POSITIVE

push temp $0$

neg

pop temp $0$

label X$\_$IS$\_$POSITIVE

$//$ Take absolute value of y

push temp $1$

push constant $0$

lt

if$-$goto MAKE$\_$Y$\_$POSITIVE

goto Y$\_$IS$\_$POSITIVE

label MAKE$\_$Y$\_$POSITIVE

push temp $1$

neg

pop temp $1$

label Y$\_$IS$\_$POSITIVE

$//$ Multiplication loop

label LOOP

push temp $1$

push constant $0$

eq

if$-$goto END$\_$LOOP

$//$ Add x to a

push local $0$

push temp $0$

add

pop local $0$

$//$ Decrement y

push temp $1$

push constant $1$

sub

pop temp $1$

$//$ Continue loop

goto LOOP

label END$\_$LOOP

$//$ Apply negative sign to the result if necessary

push temp $2$

push constant $0$

eq

if$-$goto END

$//$ Negate result

push local $0$

neg

pop local $0$

$//$ End of program

label END

goto END