Please complete the C code based on your understanding of the following assembly code. long rfun(unsigned long x) { if ( _______) return ______; unsigned long nx = _______; long rv = rfun(nx); return _______; } Options: x > 1 0 x>>4 x + rv x>>2 x > 0 x rx nx 2 Information # long rfun(unsigned long x) # x in %rdi rfun: cmpq $1, %rdi jbe .L8 movl $0, %eax ret .L8: pushq %rbx movq %rdi, %rbx shrq $4, %rdi call rfun addq %rbx, %rax popq %rbx ret Question 17 What value does rfun store in the callee-saved register %rbx? a. rv b. x c. nx d. 0

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Please complete the C code based on your understanding of the following assembly code.

long rfun(unsigned long x) { if ( _______) return ______; unsigned long nx = _______; long rv = rfun(nx); return _______; }

Options:

x > 1 0 x>>4 x + rv x>>2 x > 0 x rx nx 2

Information

# long rfun(unsigned long x) # x in %rdi rfun: cmpq $1, %rdi jbe .L8 movl $0, %eax ret .L8: pushq %rbx movq %rdi, %rbx shrq $4, %rdi call rfun addq %rbx, %rax popq %rbx ret

Question 17

What value does rfun store in the callee-saved register %rbx?

a. rv

b. x

c. nx

d. 0

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