Bonus problem. Installed PathSim (http://www.cs.sbu.edu/PathSim5/) and execute the following program on PathSim. Take two screen shots: one before the execution (after register and memory data loaded) and the other at the end of all instruction execution. Also, answer the question: how many instructions executed?

Assembly code: (note: offset/immediate data are in hex format.)

lw $t0, 48($zero)

lw $t1,48($zero)

beq $t0, $t1, 2

sw $t1, 80($zero)

add $t2, $t1, $t0

addi $t3, $zero, 46

beq $t3, $zero, 1

sw $t2, 28($t1)

sw $t3,32($t1)

DM: (Data Memory)

Location Contents

048 00000028

060 00000220

080 00000046

Register:

7: 00000122

8: 00000025

9: 00000046

10: 00000241

Step-by-step Instruction

(1) Load the above program to instruction memory

(1) Load the above register data to register file

(2) Load the above memory data to data memory

(3) Step through the instruction execution cycle by cycle by clicking on PC until the end of execution.