given a doubly linked node, represented by the structure declaration on the left, the function p$6$ is compiled to the x$86$ code on the right. fill in the code for the p$6$ function that does the same thing as the x$86$ code in ONE C statement. struct node $\{$ struct node $*$left; long val; struct node $*$right; $\}$; void p$6($struct node $*$this$)\{$ p$6$: pushq $\%$rbp movq $\%$rsp$,\%$rbp movq $\%$rdi, $-8(\%$rbp$),\%$rax movq $(\%$rax$),\%$rax movq $-8(\%$rbp$),\%$rdx movq $16(\%$rdx$),\%$rdx movq $\%$rdx$,16(\%$rax$)$ nop popq $\%$rbp ret