Write an assembly language program that, when given an integer n, will calculate

Question

Write an assembly language program that, when given an integer n, will calculate the value of the expression (n^2 + 1)^3 -3n^4. Your program is to get the value for n from ECX and is to leave the value of the expression in EAX.(note: The name of the integer multiplication instruction is imul)

Wrte an assembly language program that, when given a positive integer n, will calculate the value 2^n - n. For example, when given the value 5, your program should calculate the value 27( the difference of 32 and 5). Your program is to get the value for n from ECX and is to leave the value of 2^n - n in EAX.

Explanation / Answer

Register usage:
   EAX Sum
   ECX Original value of n

      [SECTION .text]

      global main
      
main:
      push EBP
      mov EBP, ESP

      push EBX
      push edi
      mov eax, ecx    #eax := n
      imul eax    #eax := n ^ 2
      mov ebx, 2   #eax := (n ^ 2) * 2
      imul ebx
      dec eax   #eax := ((n ^ 2) * 2) - 1
      imul ebx    #eax := (((n ^2 ) * 2) - 1) * 2
      mov edi, eax #edi := (((n ^2 ) * 2) - 1) * 2
      mov eax, ecx #eax := n
      mov ebx, ecx #ebx := n
      imul ebx # eax := n ^ 2
      imul ebx #eax := n ^ 3
      #eax := (n ^ 3) + ((((n ^ 2) * 2) - 1) * 2)

      add eax, edi
      pop edi
      pop EBX
      mov ESP, EBP
     pop EBP
    ret

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