Program in x86-64 assembly. Also if possible add comments to code. PLEASE somebo

ID: 2292136 • Letter: P

Question

Program in x86-64 assembly. Also if possible add comments to code. PLEASE somebody help me with this question. I've posted it so many times and I get no answers.

Required data section:

.data

QArray1:

.quad 0

QArray2:

.quad 0

For this lab, you will write an X86-64 assembly language program which has 4 functions, with the C language function prototypes shown below:

int main();

long readArrays(long *array_ptr1, long *array_ptr2);

void printQArray(long count, long *array_ptr, long *header_literal_address);

void printIntSquares(long count, long *array_ptr, long *header_literal_address);

The program should have 2 64-bit arrays, defined in the data section of the program, QArray1 and QArray2 both of which have a maximum size of 10 elements.

You need to write the main procedure to call the other three procedures at appropriate points,

The readArrays procedure will populate QArray1 and QArray2 with values:

The readArrays() function will return count to main().

The printQArray procedure will be called twice from main(): the first time with the size of the arrays, the address to QArray1 and an address to a string literal that says “Elements in QArray1 ”. The function should then print each 8-byte value in the array in order on a separate line with a blank line following all of the values in the array. The second time that the function is called, it should be passed the size of the arrays, the address to QArray2 and an address to a string literal that says “Elements in QArray2 ”, then printing each of the values in QArray2.

The printIntSquares() function will also be called twice from main(): the first time with the size of the arrays, the address to QArray1 and an address to a string literal that says “2- byte Squares in QArray1 ”; the second time with the size of the arrays, the address of QArray2 and an address to a string literal that says “2-byte Squares in QArray2 ”. The printIntSquares() function will read an 8-byte element from an array, then multiply the value by itself. After the multiplication, printIntSquares() will determine whether or not the product will “fit” in a 2-byte integer value. If so, then printIntSquares() should print out the value. If the product will not fit in a 2-byte integer, printIntSquares() should print out the string “overflow” rather than a number.

Explanation / Answer

ASSEMBLY CODE:

.MODEL SMALL
.STACK 100H

.DATA
PROMPT_1 DB 'Enter the Array elements :',0DH,0AH,'$'
PROMPT_2 DB 'The Array elements are : $'

ARRAY DW 10 DUP(0)

.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 READ_ARRAY ; call the procedure READ_ARRAY

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 PRINT_ARRAY ; call the procedure PRINT_ARRAY

MOV AH, 4CH ; return control to DOS
INT 21H
MAIN ENDP

;**************************************************************************;
;**************************************************************************;
;------------------------- Procedure Definitions ------------------------;
;**************************************************************************;
;**************************************************************************;

;**************************************************************************;
;----------------------------- READ_ARRAY -------------------------------;
;**************************************************************************;

READ_ARRAY PROC
; this procedure will read the elements for an 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

@READ_ARRAY: ; loop label
CALL INDEC ; call the procedure INDEC

MOV [SI], AX ; set [SI]=AX
ADD SI, 2 ; set SI=SI+2

MOV DL, 0AH ; line feed
MOV AH, 2 ; set output function
INT 21H ; print a character
LOOP @READ_ARRAY ; jump to label @READ_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
READ_ARRAY ENDP

;**************************************************************************;
;----------------------------- PRINT_ARRAY ------------------------------;
;**************************************************************************;

PRINT_ARRAY 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
MOV AX, [SI] ; set AX=AX+[SI]

CALL OUTDEC ; call the procedure OUTDEC

MOV AH, 2 ; set output function
MOV DL, 20H ; set DL=20H
INT 21H ; print a character

ADD SI, 2 ; set SI=SI+2
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
PRINT_ARRAY ENDP

;**************************************************************************;
;------------------------------- INDEC ----------------------------------;
;**************************************************************************;

INDEC PROC
; this procedure will read a number indecimal form
; input : none
; output : store binary number in AX

PUSH BX ; push BX onto the STACK
PUSH CX ; push CX onto the STACK
PUSH DX ; push DX onto the STACK

JMP @READ ; jump to label @READ

@SKIP_BACKSPACE: ; jump label
MOV AH, 2 ; set output function
MOV DL, 20H ; set DL=' '
INT 21H ; print a character

@READ: ; jump label
XOR BX, BX ; clear BX
XOR CX, CX ; clear CX
XOR DX, DX ; clear DX

MOV AH, 1 ; set input function
INT 21H ; read a character

CMP AL, "-" ; compare AL with "-"
JE @MINUS ; jump to label @MINUS if AL="-"

CMP AL, "+" ; compare AL with "+"
JE @PLUS ; jump to label @PLUS if AL="+"

JMP @SKIP_INPUT ; jump to label @SKIP_INPUT

@MINUS: ; jump label
MOV CH, 1 ; set CH=1
INC CL ; set CL=CL+1
JMP @INPUT ; jump to label @INPUT

@PLUS: ; jump label
MOV CH, 2 ; set CH=2
INC CL ; set CL=CL+1

@INPUT: ; jump label
MOV AH, 1 ; set input function
INT 21H ; read a character

@SKIP_INPUT: ; jump label

CMP AL, 0DH ; compare AL with CR
JE @END_INPUT ; jump to label @END_INPUT

CMP AL, 8H ; compare AL with 8H
JNE @NOT_BACKSPACE ; jump to label @NOT_BACKSPACE if AL!=8

CMP CH, 0 ; compare CH with 0
JNE @CHECK_REMOVE_MINUS ; jump to label @CHECK_REMOVE_MINUS if CH!=0

CMP CL, 0 ; compare CL with 0
JE @SKIP_BACKSPACE ; jump to label @SKIP_BACKSPACE if CL=0
JMP @MOVE_BACK ; jump to label @MOVE_BACK

@CHECK_REMOVE_MINUS: ; jump label

CMP CH, 1 ; compare CH with 1
JNE @CHECK_REMOVE_PLUS ; jump to label @CHECK_REMOVE_PLUS if CH!=1

CMP CL, 1 ; compare CL with 1
JE @REMOVE_PLUS_MINUS ; jump to label @REMOVE_PLUS_MINUS if CL=1

@CHECK_REMOVE_PLUS: ; jump label

CMP CL, 1 ; compare CL with 1
JE @REMOVE_PLUS_MINUS ; jump to label @REMOVE_PLUS_MINUS if CL=1
JMP @MOVE_BACK ; jump to label @MOVE_BACK

@REMOVE_PLUS_MINUS: ; jump label
MOV AH, 2 ; set output function
MOV DL, 20H ; set DL=' '
INT 21H ; print a character

MOV DL, 8H ; set DL=8H
INT 21H ; print a character

JMP @READ ; jump to label @READ

@MOVE_BACK: ; jump label

MOV AX, BX ; set AX=BX
MOV BX, 10 ; set BX=10
DIV BX ; set AX=AX/BX

MOV BX, AX ; set BX=AX

MOV AH, 2 ; set output function
MOV DL, 20H ; set DL=' '
INT 21H ; print a character

MOV DL, 8H ; set DL=8H
INT 21H ; print a character

XOR DX, DX ; clear DX
DEC CL ; set CL=CL-1

JMP @INPUT ; jump to label @INPUT

@NOT_BACKSPACE: ; jump label

INC CL ; set CL=CL+1

CMP AL, 30H ; compare AL with 0
JL @ERROR ; jump to label @ERROR if AL<0

CMP AL, 39H ; compare AL with 9
JG @ERROR ; jump to label @ERROR if AL>9

AND AX, 000FH ; convert ascii to decimal code

PUSH AX ; push AX onto the STACK

MOV AX, 10 ; set AX=10
MUL BX ; set AX=AX*BX
MOV BX, AX ; set BX=AX

POP AX ; pop a value from STACK into AX

ADD BX, AX ; set BX=AX+BX
JS @ERROR ; jump to label @ERROR if SF=1
JMP @INPUT ; jump to label @INPUT

@ERROR: ; jump label

MOV AH, 2 ; set output function
MOV DL, 7H ; set DL=7H
INT 21H ; print a character

XOR CH, CH ; clear CH

@CLEAR: ; jump label
MOV DL, 8H ; set DL=8H
INT 21H ; print a character

MOV DL, 20H ; set DL=' '
INT 21H ; print a character

MOV DL, 8H ; set DL=8H
INT 21H ; print a character
LOOP @CLEAR ; jump to label @CLEAR if CX!=0

JMP @READ ; jump to label @READ

@END_INPUT: ; jump label

CMP CH, 1 ; compare CH with 1
JNE @EXIT ; jump to label @EXIT if CH!=1
NEG BX ; negate BX

@EXIT: ; jump label

MOV AX, BX ; set AX=BX

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
INDEC 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

CMP AX, 0 ; compare AX with 0
JGE @START ; jump to label @START if AX>=0

PUSH AX ; push AX onto the STACK

MOV AH, 2 ; set output function
MOV DL, "-" ; set DL='-'
INT 21H ; print the character

POP AX ; pop a value from STACK into AX

NEG AX ; take 2's complement of AX

@START: ; jump label

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

;**************************************************************************;
;**************************************************************************;
;------------------------------ THE END ---------------------------------;
;**************************************************************************;
;************************************************************************

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