%macro write 2 ;macro for write
mov eax,4 ;syscall for write
mov ebx,1 ;stdout
mov ecx,%1 ;string to be accepted
mov edx,%2 ;length of string
int 80h
%endmacro
%macro read 2 ;macro for read
mov eax,3 ;read syscall
mov ebx,0 ;stdin
mov ecx,%1 ;to be saved in
mov edx,%2 ;length of variable
int 80h
%endmacro
section .data
new db " ",0xa ;our dear string
lenn equ $ - new ;length of our dear string
new1 db "First Number is: " ;our dear string
lenn1 equ $ - new1 ;length of our dear string
new2 db "Second Number is: " ;our dear string
lenn2 equ $ - new2 ;length of our dear string
str1 db "*Menu*",0xa ;our dear string
lenstr1 equ $ - str1 ;length of our dear string
str2 db "1.Addition",0xa ;our dear string
lenstr2 equ $ - str2 ;length of our dear string
str3 db "2.Subtraction",0xa ;our dear string
lenstr3 equ $ - str3 ;length of our dear string
str4 db "3.Multiplication",0xa ;our dear string
lenstr4 equ $ - str4 ;length of our dear string
str5 db "4.Division",0xa ;our dear string
lenstr5 equ $ - str5 ;length of our dear string
str6 db "****",0xa ;our dear string
lenstr6 equ $ - str6 ;length of our dear string
msg db "Sum is: " ;our dear string
len equ $ - msg ;length of our dear string
msg1 db "Difference is: " ;our dear string
len1 equ $ - msg1 ;length of our dear string
msg2 db "Multiplication is: " ;our dear string
len2 equ $ - msg2 ;length of our dear string
msg3 db "Division of Numbers" ;our dear string
len3 equ $ - msg3 ;length of our dear string
msg4 db "Quotient is: " ;our dear string
len4 equ $ - msg4 ;length of our dear string
strn db "Remainder is: " ;our dear string
newlen equ $ - strn ;length of our dear string
msg5 db "Enter your choice: " ;our dear string
len5 equ $ - msg5 ;length of our dear string
msg6 db "Invalid choice: " ;our dear string
len6 equ $ - msg6 ;length of our dear string
num1 dw '9'
num1len equ $ - num1 ;length of our dear string
num2 dw '9'
num2len equ $ - num2 ;length of our dear string
segment .bss
opt resb 5 ;declaring uninitialized variable opt
res1 resb 2 ;declaring uninitialized variable res1
res2 resb 2 ;declaring uninitialized variable res2
quot resb 2 ;declaring uninitialized variable quot
rem resb 2 ;declaring uninitialized variable rem
section .text
global _start ;must be declared for using gcc
_start: ;tell linker entry point
write new1,lenn1
write num1,num1len
write new,lenn ;write new line
write new2,lenn2
write num2,num2len
write new,lenn ;write new line
write str1,lenstr1
write str2,lenstr2 ;printing menu
write str3,lenstr3
write str4,lenstr4
write str5,lenstr5
write str6,lenstr6
write new,lenn ;write new line
write msg5,len5
read opt,5
write opt,5
write new,lenn ;write new line
cmp byte[opt],'1'
je case1 ;jump if equal to case1
cmp byte[opt],'2'
je case2
cmp byte[opt],'3'
je case3
cmp byte[opt],'4'
je case4
cmp byte[opt],'5'
je case5
cmp byte[opt],'6'
je case5
cmp byte[opt],'7'
je case5
cmp byte[opt],'8'
je case5
cmp byte[opt],'9'
je case5
cmp byte[opt],'0'
je case5
case1:
call addition
jmp exit
case2:
call subtraction
jmp exit
case3:
call multiplication
jmp exit
case4:
call division
jmp exit
case5:
write msg6,len6
jmp exit
exit:
mov eax, 1 ;system call number (sys_exit)
mov ebx,0
int 0x80 ;call kernel
addition: ;addition procedure
mov al, [num1] ;num1 to eax
sub al, 0x30 ;maintaining the ascii
mov bl, [num2] ;num2 to eax
sub bl, 0x30 ;maintaining the ascii
add al, bl ;adding ebx to eax
call display ;display 2 digit number
write msg,len
write quot,2
write rem,2
write new,lenn ;write new line
ret
subtraction:
mov al, [num1] ;num1 to eax
mov bl, [num2] ;num2 to eax
sub al, 0x30 ;maintaining the ascii
sub bl, 0x30 ;maintaining the ascii
sub al, bl ;subtracting eax and ebx
call display
write msg1,len1
write quot,2
write rem,2
write new,lenn ;write new line
ret
multiplication:
mov al, [num1] ;num1 to eax
mov bl, [num2] ;num2 to eax
sub al, 0x30 ;maintaining the ascii
sub bl, 0x30 ;maintaining the ascii
mul bl ;multiplying bl to al
call display ;calling display procedure
write msg2,len2 ;write msg
write quot,1 ;write quot
write rem,1 ;write rem
write new,lenn ;write new line
ret
division:
mov al, [num1] ;num1 to eax
sub al, 0x30 ;maintaining the ascii
mov bl, [num2] ;num2 to eax
sub bl, 0x30 ;maintaining the ascii
div bl ;divding al by bl
add al,0x30 ;maintaining the ascii
add ah,0x30 ;maintaining the ascii
mov [res1],al ;al to res3
mov [res2],ah
write msg3,len3 ;write msg
write new,lenn ;write new line
write msg4,len4 ;write msg
write res1,1 ;write res1
write new,lenn ;write new line
write strn,newlen ;write msg
write res2,1 ;write res2
write new,lenn ;write new line
ret
display: ;Procedure display
mov bl,10 ;10 to bl
div bl ;dividing by bl
;al=quot ah=rem
add al,30h ;maintaining the ascii
mov [quot],al ;al to quot
add ah,30h ;maintaining the ascii
mov [rem],ah ;ah to rem
ret
