Please explain what each step in the assembly code is doing. Use variable "n".

mysteryl: pushl %ebp movl %esp, %ebp subl $8, %esp $0, 8 (%ebp) jne .L.2 movl $1, -4 (%ebp) mp .L3 L2: movl shri movl call addl movl 8 (%ebp) , %eax %eax %eax, (%esp) mysteryl $1, %eax %eax, -4(%ebp) L3: movl -4 (%ebp), leave ret %eax mysteryl: pushl %ebp movl %esp, %ebp subl $8, %esp $0, 8 (%ebp) jne .L.2 movl $1, -4 (%ebp) mp .L3 L2: movl shri movl call addl movl 8 (%ebp) , %eax %eax %eax, (%esp) mysteryl $1, %eax %eax, -4(%ebp) L3: movl -4 (%ebp), leave ret %eax