nibbleswap function x86 assembly

How can I do this?

Local Windows Debugger (Global Scope) nibbleSwap(int x, int r) PART 2 A nibble is a four-bit aggregation, or half an octet. There are two nibbles in a byte Given a 4-byte number,x and a rotation amount, r. Rotate the 4 most significant nibbles of x (which are the 2 most significant bytes of x) according to r.You are NOT allowed to use loops. You are NOT allowed to use any version of the MUL or DIV instructions Implementation details: The two input integers are stored in registers EBX and ESI. You need to store the answer into register EAX. As usual, you are allowed to use (and reuse) any registers except EBP and ESP Dint nibbleSwap(int x, int r) int output asm xor eax, eax mov ebx, x mov esi, r IYOUR CODE STARTS HERE / YOUR CODE ENDS HERE t from: Build