cs501 assignment no 1 solution fall 2011

	Assignment No. 01 Semester Fall 2011 Advance Computer Architecture - CS501			Total Marks: 20 Due Date: 31/10/2011
Objective: To learn and understand classification of instructions. Instructions: Please read the following instructions carefully before solving & submitting assignment: Assignment should be in your own wordings not copied from net, handouts or books. It should be clear that your assignment will not get any credit (zero marks) if: o        The assignment is submitted after due date. o        The submitted assignment does not open or file is corrupt. o        The assignment is copied (from other student or copied from handouts or internet). GOOD LUCK
Question No 1			Marks: 5+5+5+5 = 20
Write the code to implement the expression A = (B+C) * (D + E) for 1)      3-address instructions 2)      2-address instructions 3)      1-address instructions 4)      0-address instructions In accordance with programming language practice, computing the expression should not change the values of its operands. ========================================================================= Solution 1)      3-address instructions add x, b, c add y, d, e mul a, x, y 2)      2-address instructions  load r, d                                                    add r, e  load y, b        add y, c                                             mul y, r                                                    store a, y 3)      1-address instructions lda B adda C sta x lda D adda E mula x sta A 4)      0-address instructions push b                                                    push c add push d                                                    push e           add mul                                                    pop a