fib_indirect.S

fib:
    push rbp
    mov  rbp,             rsp
    sub  rsp,             0x10
    xor  eax,             eax
    cmp  rsi,             0
    sete al
    test eax,             eax
    ; If `rsi` is _not_ zero, then jump to .fib-then
    je   .fib_then
    mov  eax,             1
    jmp  .fib_ret
 .fib_then:
    mov  rax,             rsi
    sub  rax,             1
    mov  r10d,            1
    mov  qword ptr [rsp], rsi
    mov  rsi,             rax
    lea  rax,             qword ptr [rip + fib@GOTPCREL]
    test r10d,            1
    je   0xc2
    lea  rax,             qword ptr [rip + fac@GOTPCREL]
    test r10d,            2
    je   0xc2
    ud2  
    call rax
    imul rax,             qword ptr [rsp]
    mov  rsi,             qword ptr [rsp]
 .fib_ret:
    mov  rsp,             rbp
    pop  rbp
    ret