Question

**IN AT&T ASSEMBLY LANG**

Write an assembly language program which either hardcodes or reads in two integers, A and B, and uses them to compute the following expressions. You must use the same values for A and B throughout all three expressions.

1. A * 5

2. (A + B) - (A / B)

3. (A - B) + (A * B)

Answer 1

Assembly language program to perform the following functions

• Define two integers
• Process the three function
• A * 5
• (A + B) - (A / B)
• (A - B) + (A * B)

Source code(Note: Assembly Language x86-64 gcc 10.2 is used and run on exact compiler for the best result)

.LC0:
        .string "Enter first integer number: "
.LC1:
        .string "Enter second integer number: "
.LC2:
        .string "The result of A * 5 is :"
.LC3:
        .string "The result of (A + B) - (A / B) is :"
.LC4:
        .string "The result of (A - B) + (A * B) is :"
main:
        push    rbp
        mov     rbp, rsp
        sub     rsp, 16
        mov     esi, OFFSET FLAT:.LC0
        mov     edi, OFFSET FLAT:_ZSt4cout
        call    std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)
        lea     rax, [rbp-4]
        mov     rsi, rax
        mov     edi, OFFSET FLAT:_ZSt3cin
        call    std::basic_istream<char, std::char_traits<char> >::operator>>(int&)
        mov     esi, OFFSET FLAT:.LC1
        mov     edi, OFFSET FLAT:_ZSt4cout
        call    std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)
        lea     rax, [rbp-8]
        mov     rsi, rax
        mov     edi, OFFSET FLAT:_ZSt3cin
        call    std::basic_istream<char, std::char_traits<char> >::operator>>(int&)
        mov     esi, OFFSET FLAT:.LC2
        mov     edi, OFFSET FLAT:_ZSt4cout
        call    std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)
        mov     rcx, rax
        mov     edx, DWORD PTR [rbp-4]
        mov     eax, edx
        sal     eax, 2
        add     eax, edx
        mov     esi, eax
        mov     rdi, rcx
        call    std::basic_ostream<char, std::char_traits<char> >::operator<<(int)
        mov     esi, OFFSET FLAT:_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_
        mov     rdi, rax
        call    std::basic_ostream<char, std::char_traits<char> >::operator<<(std::basic_ostream<char, std::char_traits<char> >& (*)(std::basic_ostream<char, std::char_traits<char> >&))
        mov     esi, OFFSET FLAT:.LC3
        mov     edi, OFFSET FLAT:_ZSt4cout
        call    std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)
        mov     rcx, rax
        mov     edx, DWORD PTR [rbp-4]
        mov     eax, DWORD PTR [rbp-8]
        lea     esi, [rdx+rax]
        mov     eax, DWORD PTR [rbp-4]
        mov     edi, DWORD PTR [rbp-8]
        cdq
        idiv    edi
        mov     edx, eax
        mov     eax, esi
        sub     eax, edx
        mov     esi, eax
        mov     rdi, rcx
        call    std::basic_ostream<char, std::char_traits<char> >::operator<<(int)
        mov     esi, OFFSET FLAT:_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_
        mov     rdi, rax
        call    std::basic_ostream<char, std::char_traits<char> >::operator<<(std::basic_ostream<char, std::char_traits<char> >& (*)(std::basic_ostream<char, std::char_traits<char> >&))
        mov     esi, OFFSET FLAT:.LC4
        mov     edi, OFFSET FLAT:_ZSt4cout
        call    std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)
        mov     rdx, rax
        mov     eax, DWORD PTR [rbp-4]
        mov     ecx, DWORD PTR [rbp-8]
        sub     eax, ecx
        mov     esi, eax
        mov     ecx, DWORD PTR [rbp-4]
        mov     eax, DWORD PTR [rbp-8]
        imul    eax, ecx
        add     eax, esi
        mov     esi, eax
        mov     rdi, rdx
        call    std::basic_ostream<char, std::char_traits<char> >::operator<<(int)
        mov     eax, 0
        leave
        ret
__static_initialization_and_destruction_0(int, int):
        push    rbp
        mov     rbp, rsp
        sub     rsp, 16
        mov     DWORD PTR [rbp-4], edi
        mov     DWORD PTR [rbp-8], esi
        cmp     DWORD PTR [rbp-4], 1
        jne     .L5
        cmp     DWORD PTR [rbp-8], 65535
        jne     .L5
        mov     edi, OFFSET FLAT:_ZStL8__ioinit
        call    std::ios_base::Init::Init() [complete object constructor]
        mov     edx, OFFSET FLAT:__dso_handle
        mov     esi, OFFSET FLAT:_ZStL8__ioinit
        mov     edi, OFFSET FLAT:_ZNSt8ios_base4InitD1Ev
        call    __cxa_atexit
.L5:
        nop
        leave
        ret
_GLOBAL__sub_I_main:
        push    rbp
        mov     rbp, rsp
        mov     esi, 65535
        mov     edi, 1
        call    __static_initialization_and_destruction_0(int, int)
        pop     rbp
        ret

The output

  

T