Internal Forwarding Techniques(Java Code):Store Fetch,Fetch Fetch,Store Store Forwarding

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AIM:To study Internal Forwarding Techniques. //Program: import java.util.*; class internal_forward { static void menu() { System.out.println("Menu:\nRegisters: R1 R2 R3\nMemory locations: M1 M2 M3\nSample instruction:MOV M1,R1\n"); } static void accept(String s[][]) { Scanner scr=new Scanner(System.in); System.out.print("\nEnter the two intructions:"); System.out.print("\nFirst Instruction:\nSource: "); s[0][1]=scr.nextLine(); System.out.print("\nDestination: "); s[0][0]=scr.nextLine(); System.out.print("\nSecond instruction:\nSource: "); s[1][1]=scr.nextLine(); System.out.print("\nDestination: "); s[1][0]=scr.nextLine(); } static int check1(String s[][]) { if(s[0][0].equals(s[1][1])) { System.out.println("\nStore Fetch Forwarding can be used"); System.out.println("MOV "+s[0][0]+" "+s[0][1]+"\nMOV "+s[1][0]+" "+s[0][1]); return 1; } return 0; } static int check2(String s[][]) { if(s[0][1].equals(s[1][1])) { System.out.println("\nFetch Fetch Forwarding can be used"); System.out.println("MOV "+s[0][0]+" "+s[0][1]+"\nMOV "+s[1][0]+" "+s[0][0]); return 2; } return 0; } static int check3(String s[][]) { if(s[0][0].equals(s[1][0])) { System.out.println("\nStore Store Forwarding can be used"); System.out.println("MOV "+s[0][0]+" "+s[1][1]); return 3; } return 0; } public static void main(String args[]) { Scanner scr=new Scanner(System.in); System.out.println("Three Internal forwarding techniques:\n1.Store Fetch Forwarding\n2.Fetch Fetch Forwarding\n3.Store Store Forwarding\n\n"); String s[][]=new String[2][2]; int choice=1; int flag=0; do { flag=0; menu(); accept(s); System.out.println("Your intructions are as follows:\nMOV "+s[0][0]+" "+s[0][1]+"\nMOV "+s[1][0]+" "+s[1][1]); flag=check1(s); if(flag==0) flag=check2(s); if(flag==0) flag=check3(s); if(flag==0) System.out.println("Your instructions are OK.No need to apply any of the 3 internal forwarding techniques."); System.out.println("Do you wish to continue?(1/0)"); choice=scr.nextInt(); } while(choice==1); } } /*OUTPUT C:\Users\Aditya\Desktop\aditya>javac internal_forward.java C:\Users\Aditya\Desktop\aditya>java internal_forward Three Internal forwarding techniques: 1.Store Fetch Forwarding 2.Fetch Fetch Forwarding 3.Store Store Forwarding Menu: Registers: R1 R2 R3 Memory locations: M1 M2 M3 Sample instruction:MOV M1,R1 Enter the two intructions: First Instruction: Source: R1 Destination: M1 Second instruction: Source: M1 Destination: R2 Your intructions are as follows: MOV M1 R1 MOV R2 M1 Store Fetch Forwarding can be used MOV M1 R1 MOV R2 R1 Do you wish to continue?(1/0) 1 Menu: Registers: R1 R2 R3 Memory locations: M1 M2 M3 Sample instruction:MOV M1,R1 Enter the two intructions: First Instruction: Source: M2 Destination: R1 Second instruction: Source: M2 Destination: R2 Your intructions are as follows: MOV R1 M2 MOV R2 M2 Fetch Fetch Forwarding can be used MOV R1 M2 MOV R2 R1 Do you wish to continue?(1/0) 1 Menu: Registers: R1 R2 R3 Memory locations: M1 M2 M3 Sample instruction:MOV M1,R1 Enter the two intructions: First Instruction: Source: R1 Destination: M3 Second instruction: Source: R3 Destination: M3 Your intructions are as follows: MOV M3 R1 MOV M3 R3 Store Store Forwarding can be used MOV M3 R3 Do you wish to continue?(1/0) 1 Menu: Registers: R1 R2 R3 Memory locations: M1 M2 M3 Sample instruction:MOV M1,R1 Enter the two intructions: First Instruction: Source: R1 Destination: M2 Second instruction: Source: M1 Destination: R3 Your intructions are as follows: MOV M2 R1 MOV R3 M1 Your instructions are OK.No need to apply any of the 3 internal forwarding techniques. Do you wish to continue?(1/0) 0 */

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