Question

Q1 [15] Convert the following C code to LEG. Assume the following variable/register assignments: Base of A i X19 X20 int main { long long int A[6] = {1, 2, e, e, e, e}; for unsigned int i = 0; i < { A[i+2] myFunction (A[ i] , A[i+1] ); } return 0 } 4; i+ //convert to LEG //convert to LEG //convert the entire myFunction to LEG long long int myFunction (long long int num1, long long int num2) return (num1 + (2 * num2) 5); } Note: you are not required to convert int main, the array declaration/initialization, LEG. You need to convert the for loop and myFunction to LEG return 0 to or

convert C to LEGv8

(an example given below)

Answer 1

  mov DWORD PTR [rbp-20], 0
jmp .L2
.L3:
mov eax, DWORD PTR [rbp-20]
lea ebx, [rax+2]
mov eax, DWORD PTR [rbp-20]
add eax, 1
mov eax, eax
mov rdx, QWORD PTR [rbp-80+rax*8]
mov eax, DWORD PTR [rbp-20]
mov rax, QWORD PTR [rbp-80+rax*8]
mov rsi, rdx
mov rdi, rax
mov eax, 0
call myFunction
cdqe
mov edx, ebx
mov QWORD PTR [rbp-80+rdx*8], rax
add DWORD PTR [rbp-20], 1
.L2:
cmp DWORD PTR [rbp-20], 3
jbe .L3
mov eax, 0
add rsp, 72
pop rbx
pop rbp
ret