The assignment here is to write a subprogram that returns the largest of the (signed) values in four registers. You are to run your program with my driver sending its output to a file. The first thing you should do is simplify the specified command line down to a bare minimum:

java -jar Toy.jar +run MAX4driver.toy MAX4.dos

2 of 2 +W 5: MAX4 Subprogram Task: find the largest of 4 signed values MAX4 subprogram interface: On entry: Registers $A, $B, $c, $D are signed Register SF is the return address Invariant: $A, $B, $c, $D, main memory On exit: Register $E is max ($A, $B, $C, $D) Assignment: Driver supplies $A, $B, $C, $D, and $F as indicated Your subprogram puts maximum value into register $E Returns to Driver with this instruction: ret $F MAX5 Subprogram Driver DRIVER : $1