Disclaimer: I am a beginner, and this is the worst language i have ever seen

The goal is to decode a message.
Each character is encoded in 8 bytes

• 7-8 byte doesnt matter, assume 0
• 3-6 byte index
• 2nd byte amount (times the character needs to be printed)
• 1st byte character

The character and amount are correct, but for some reason I can’t get the right index.
With the index I can go to the next address of the character that needs to print from $message

This isn’t just some segmentation fault, so i don’t really understand why i don’t get the correct index value. Right now i get:
“HWo
l!olred” instead of “Hello world!”

decode:
pushq    %rbp
movq     %rsp, %rbp

pushq    %rdi 
pushq    $4 # 16 Stack allignment

movq    (%rdi), %rax     # Load 8-byte message from address in %rdi

movb    %al, %sil        # Move the least significant byte of %rax to %sil
shr     $8, %rax         # Shift %rax right by 8 bits
movb    %al, %bl         # Move the least significant byte of %rax to %bl
shr     $8, %rax         # Shift %rax right by 8 bits

.loop:
cmpl   $0, %eax
je     .finish

movq    $String, %rdi    # Move the format string to %rdi
call    printf           # Print the character

dec     %bl              # Decrement the "amount" counter
cmpb    $1, %bl          # Compare %bl (amount) with 1 
jg      .loop              

popq    %rdi
popq    %rdi            # Remove 16 bytes

imull   $8, %eax         # Multiply the index by 8 (8 byte memory blocks)
addq    %rax, %rdi

call    decode

.finish: 
movq %rbp, %rsp
popq %rbp
ret


main:
pushq   %rbp             # Push the base pointer (and align the stack)
movq    %rsp, %rbp       # Copy stack pointer value to base pointer

movq    $MESSAGE, %rdi   # First parameter: address of the message
call    decode           # Call decode

popq    %rbp             # Restore base pointer location 
movq    $0, %rdi         # Load program exit code
call    exit             # Exit the program