Suppose we want to generate assembly code for the following C function:

The code that follows is a portion of the assembly code that performs the actual shifts and leaves the final value in register %rax. Two key instructions have been omitted. Parameters x and n are stored in registers %rdi and %rsi, respectively.

Fill in the missing instructions, following the annotations on the right. The right shift should be performed arithmetically.

long shift_left4_rightn (long x, long n) { } x < >= n; return x;