Assembly Programming Language using Visual Studio May be co

Assembly Programming Language using Visual Studio  - May be completed in either 32-bit mode or 64-bit mode

Exchanging Pairs of Array Values

Write a program with a loop and indexed addressing that exchanges every pair of values in an array with an even number of elements. Therefore, item i will exchange with item i+1, and item i+2 will exchange with item i+3, and so on.

Solution

push rbp
mov rbp, rsp
mov DWORD PTR [rbp-48], 1
mov DWORD PTR [rbp-44], 4
mov DWORD PTR [rbp-40], 45
mov DWORD PTR [rbp-36], 6
mov DWORD PTR [rbp-32], 10
mov DWORD PTR [rbp-28], 8
mov DWORD PTR [rbp-4], 6
mov DWORD PTR [rbp-8], 0
.L3:
mov eax, DWORD PTR [rbp-8]
cmp eax, DWORD PTR [rbp-4]
jge .L2
mov eax, DWORD PTR [rbp-8]
cdqe
mov eax, DWORD PTR [rbp-48+rax*4]
mov DWORD PTR [rbp-12], eax
mov eax, DWORD PTR [rbp-8]
add eax, 1
cdqe
mov edx, DWORD PTR [rbp-48+rax*4]
mov eax, DWORD PTR [rbp-8]
cdqe
mov DWORD PTR [rbp-48+rax*4], edx
mov eax, DWORD PTR [rbp-8]
add eax, 1
cdqe
mov edx, DWORD PTR [rbp-12]
mov DWORD PTR [rbp-48+rax*4], edx
jmp .L3
.L2:
mov eax, 0
pop rbp
ret