. Write a bubble sort in assembly. . Practice conditional jumps, indirect addres
ID: 649727 • Letter: #
Question
. Write a bubble sort in assembly. . Practice conditional jumps, indirect addressing, and using procedures/subroutines. Requirements Write a MIPS assembly language program that reads in a set of numbers from the user, sorts them into order with the bubble sort algorithm, and displays the sorted set of numbers. Here are the requirements: . Separate the program?s work into four procedures: ReadNums, BSort, PrintNums, and main procedure to tie everything together. . The ReadNums procedure should: Use register S0 as a parameter that points to the start of 10 free words of memory. Ask the user how many numbers thed like to enter and read in their answer. If their answer is less than 1 or greater than 10, display an appropriate error message and repeat the question until they enter a number 1.. 10. Read in that many numbers into the array pointed to by S0. Return the count in register Sl. . The BSort procedure should: Use register S0 as a parameter that points to the start of an array of words and S1 as a count of how many numbers (1-10) are in that array. Sort the numbers into order using the Bubble Sort algorithm. . The PrintNums procedure should: Use register S0 as a parameter that points to the start of an array of words and S1 as a count of how many numbers (1-10) are in that array. Print out the numbers on a single line with commas between each of the numbers. . The main procedure should call ReadNurns, BSort, and PrintNums appropriately. . Don?t be lazy and assume S0 or S1 has the appropriate value each time you call a subroutine. Put code in main to save the values when a routine returns to main and set the registers appropriately before you call a routine. . Consider making a Java, C, or other high-level language version first to get your logic correct and be able to focus on translating it into assembly.Explanation / Answer
.MODEL SMALL
.STACK 100H
.DATA
PROMPT_1 DB 'The contents of the array before sorting : $'
PROMPT_2 DB 0DH,0AH,'The contents of the array after sorting : $'
ARRAY DB 3,1,9,0,2,6,1,7,8,5
.CODE
MAIN PROC
MOV AX, @DATA ; initialize DS
MOV DS, AX
MOV BX, 10 ; set BX=10
LEA DX, PROMPT_1 ; load and display the string PROMPT_1
MOV AH, 9
INT 21H
LEA SI, ARRAY ; set SI=offset address of ARRAY
CALL PRINT_ARRAY ; call the procedure PRINT_ARRAY
LEA SI, ARRAY ; set SI=offset address of the ARRAY
CALL BSORT ; call the procedure BUBBLE_SORT
LEA DX, PROMPT_2 ; load and display the string PROMPT_2
MOV AH, 9
INT 21H
LEA SI, ARRAY ; set SI=offset address of ARRAY
CALL PRINTNums ; call the procedure PRINT_ARRAY
MOV AH, 4CH ; return control to DOS
INT 21H
MAIN ENDP
;------------------------- Procedure Definitions ------------------------;
;----------------------------- PRINT_ARRAY ------------------------------;
PRINTNums PROC
; this procedure will print the elements of a given array
; input : SI=offset address of the array
; : BX=size of the array
; output : none
PUSH AX ; push AX onto the STACK
PUSH CX ; push CX onto the STACK
PUSH DX ; push DX onto the STACK
MOV CX, BX ; set CX=BX
@PRINT_ARRAY: ; loop label
XOR AH, AH ; clear AH
MOV AL, [SI] ; set AL=[SI]
CALL OUTDEC ; call the procedure OUTDEC
MOV AH, 2 ; set output function
MOV DL, 20H ; set DL=20H
INT 21H ; print a character
INC SI ; set SI=SI+1
LOOP @PRINT_ARRAY ; jump to label @PRINT_ARRAY while CX!=0
POP DX ; pop a value from STACK into DX
POP CX ; pop a value from STACK into CX
POP AX ; pop a value from STACK into AX
RET ; return control to the calling procedure
PRINTNums ENDP
;---------------------------- BUBBLE_SORT -------------------------------;
BSORT PROC
; this procedure will sort the array in ascending order
; input : SI=offset address of the array
; : BX=array size
; output : none
PUSH AX ; push AX onto the STACK
PUSH BX ; push BX onto the STACK
PUSH CX ; push CX onto the STACK
PUSH DX ; push DX onto the STACK
PUSH DI ; push DI onto the STACK
MOV AX, SI ; set AX=SI
MOV CX, BX ; set CX=BX
DEC CX ; set CX=CX-1
@OUTER_LOOP: ; loop label
MOV BX, CX ; set BX=CX
MOV SI, AX ; set SI=AX
MOV DI, AX ; set DI=AX
INC DI ; set DI=DI+1
@INNER_LOOP: ; loop label
MOV DL, [SI] ; set DL=[SI]
CMP DL, [DI] ; compare DL with [DI]
JNG @SKIP_EXCHANGE ; jump to label @SKIP_EXCHANGE if DL<[DI]
XCHG DL, [DI] ; set DL=[DI], [DI]=DL
MOV [SI], DL ; set [SI]=DL
@SKIP_EXCHANGE: ; jump label
INC SI ; set SI=SI+1
INC DI ; set DI=DI+1
DEC BX ; set BX=BX-1
JNZ @INNER_LOOP ; jump to label @INNER_LOOP if BX!=0
LOOP @OUTER_LOOP ; jump to label @OUTER_LOOP while CX!=0
POP DI ; pop a value from STACK into DI
POP DX ; pop a value from STACK into DX
POP CX ; pop a value from STACK into CX
POP BX ; pop a value from STACK into BX
POP AX ; pop a value from STACK into AX
RET ; return control to the calling procedure
BSORT ENDP
;-------------------------------- OUTDEC --------------------------------;
OUTDEC PROC
; this procedure will display a decimal number
; input : AX
; output : none
PUSH BX ; push BX onto the STACK
PUSH CX ; push CX onto the STACK
PUSH DX ; push DX onto the STACK
XOR CX, CX ; clear CX
MOV BX, 10 ; set BX=10
@OUTPUT: ; loop label
XOR DX, DX ; clear DX
DIV BX ; divide AX by BX
PUSH DX ; push DX onto the STACK
INC CX ; increment CX
OR AX, AX ; take OR of Ax with AX
JNE @OUTPUT ; jump to label @OUTPUT if ZF=0
MOV AH, 2 ; set output function
@DISPLAY: ; loop label
POP DX ; pop a value from STACK to DX
OR DL, 30H ; convert decimal to ascii code
INT 21H ; print a character
LOOP @DISPLAY ; jump to label @DISPLAY if CX!=0
POP DX ; pop a value from STACK into DX
POP CX ; pop a value from STACK into CX
POP BX ; pop a value from STACK into BX
RET ; return control to the calling procedure
OUTDEC ENDP
END MAIN
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.