Write an assembly language (MIPS) program to encrypt digits as shown below: Inpu

Question

Write an assembly language (MIPS) program to encrypt digits as shown below: Input digit: 0 1 2 3 4 5 6 7 8 9 Encrypted digit: 4 6 9 5 0 3 1 8 7 2 Your program should accept a string consisting of digit and non-digit characters. The encrypt string should be displayed in which only the digits are affected. Then, the user should be queried whether he of she wants to terminate the program. If the response is either 'y' or 'Y' you should terminate the program: otherwise, you should request another input string from the keyboard The encryption scheme given here has the property that when you encrypt an already encrypted string, you get back the original string. Use this property to verify your program. Sample output Please input phrase to code/decode (14 character limit) Let123 Let655 would you Like to terminate the program? N Please input phrase to code/decode (16 character limi) Let693 Let123 would you Like to terminates the program? li Sr0,4 la Sa0, [str_addr] a string address syscall Read character from keyboard Li Sr0, 12 Syscall character is read in Sr0 Read using from keyboard Li Sr0, 8 La Sa0, [addr] Sload address to S20 Li Sa1, len load string length in Sal Refer to the link below for more information. Lab Assignment: Provide comments throughout your code. Write a report, which includes: MIPS Code for each program Output screen shot for registers' console for each program. Conclusion. Write a survey report on the latest MIPS 64 bit warrior class processor's architecture and features. (Font size 12, single space lines).

Explanation / Answer

###ASSEMBLY LANGUAGE PROGRAM###

DATA SEGMENT #data segment starting here

STR1 DB 10,13,'ENTER STRING HERE :- $' #declare string 1

STR2 DB 10,13,'ENCRYPTED STRING IS :- $'#declare string 2

MSG3 DB 10,13,'DECPED STRING IS : $'

P1 LABEL BYTE

M1 DB 0FFH

L1 DB ?

P11 DB 0FFH DUP ('$')

DATA ENDS #here the data segment can be end

DISPLAY MACRO MSG # this displays Macro message

MOV AH,9

LEA DX,MSG

INT 21H

ENDM   

CODE SEGMENT

ASSUME CS:CODE,DS:DATA

START:

MOV AX,DATA #copying Data in to AX register

MOV DS,AX #copying AX in to DS

DISPLAY STR1

LEA DX,P1

MOV AH,0AH

INT 21H

  

LEA SI,P11

MOV CL,L1 #transfer the content of L1 register to the content #of CL register

CALL ENCRYPT

DISPLAY STR2 #Displaying String2

DISPLAY P11 #Displaying P11

LEA SI,P11

MOV CL,L1 #transfer the content of L1 reg to the content of #CL reg

CALL ENCRYPT

DISPLAY MSG3 #display MSG3

DISPLAY P11 #display P11

MOV AH,4CH #transfer 4CH to AH

INT 21H

CODE ENDS

ENC PROC NEAR

MOV CH,0   

CHECK1: #Check process starting here

CMP [SI],2FH

JB DONE1

CMP [SI],3AH

JB NUM1

CMP [SI],41H

JB DONE1

CMP [SI],5BH

JB UPR1

CMP [SI],61H

JB DONE1

CMP [SI],7BH

JB LWR1

NUM1: CMP [SI],35H

JB LNUM1

SUB [SI],05H

JMP DONE1

LNUM1:

ADD [SI],05H #Adding 05H to [SI]

JMP DONE1   

UPR1: CMP [SI],4EH

JB LUPR1

SUB [SI],0DH

JMP DONE1

LUPR1:

ADD [SI],0DH #Adding 0DH to the register[SI]

JMP DONE1

LWR1: CMP [SI],6EH

JB LLWR1

SUB [SI],0DH

JMP DONE1

LLWR1:

ADD [SI],0DH

DONE1:   

INC SI

LOOP CHECK1 #Loop checking process

RET

ENC ENDP

DECP PROC NEAR

MOV CH,0   

CHECK2:

CMP [SI],2FH

JB DONE2

CMP [SI],3AH

JB NUM2

CMP [SI],41H

JB DONE2

CMP [SI],5BH

JB UPR2

CMP [SI],61H

JB DONE2

CMP [SI],7BH

JB LWR2

NUM2: CMP [SI],35H

JB LNUM2

ADD [SI],05H

JMP DONE2

LNUM2:

SUB [SI],05H

JMP DONE2   

UPR2: CMP [SI],4EH

JB LUPR2

ADD [SI],0DH

JMP DONE2

LUPR2:

SUB [SI],0DH

JMP DONE2

LWR2: CMP [SI],6EH

JB LLWR2

ADD [SI],0DH

JMP DONE2

LLWR2:

SUB [SI],0DH

DONE2:   

INC SI

LOOP CHECK2

RET

DECP ENDP

END START

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.