user: Demonstrate the C code that generates the assembly output below:

```asm
<Fibonacci_rec>:
  endbr64
  mov    %edi,%r10d
  test   %edi,%edi
  je     L219
  cmp    $0x1,%edi
  je     L219
  push   %r15
  lea    -0x2(%rdi),%eax
  xor    %r10d,%r10d
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x38,%rsp
  mov    %eax,0x4(%rsp)
  mov    %r10d,0x10(%rsp)
L133:
  mov    0x4(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L315
  cmp    $0x1,%eax
  je     L369
  lea    -0x1(%rdi),%eax
  xor    %r8d,%r8d
  mov    %eax,0x8(%rsp)
  mov    %r8d,0x14(%rsp)
L398:
  mov    0x8(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L362
  cmp    $0x1,%eax
  je     L400
  lea    -0x1(%rdi),%eax
  xor    %ecx,%ecx
  mov    %eax,0xc(%rsp)
  mov    %ecx,0x18(%rsp)
L234:
  mov    0xc(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L64
  cmp    $0x1,%eax
  je     L211
  xor    %ecx,%ecx
  lea    -0x1(%rdi),%r8d
  mov    %ecx,0x1c(%rsp)
  mov    %r8d,%ecx
L138:
  mov    %ecx,%eax
  add    $0x1,%eax
  je     L498
  cmp    $0x1,%eax
  je     L21
  xor    %esi,%esi
  mov    %ecx,0x20(%rsp)
  lea    -0x1(%rcx),%r9d
  mov    %esi,(%rsp)
  mov    %r9d,%r15d
L518:
  mov    %r15d,%eax
  add    $0x1,%eax
  je     L286
  cmp    $0x1,%eax
  je     L228
  lea    -0x1(%r15),%r12d
  xor    %ecx,%ecx
  mov    %r15d,%esi
L390:
  mov    %r12d,%eax
  add    $0x1,%eax
  je     L522
  cmp    $0x1,%eax
  je     L298
  xor    %ebx,%ebx
  lea    -0x1(%r12),%ebp
  mov    %r12d,%edx
  mov    %ebx,%r12d
L155:
  mov    %ebp,%eax
  add    $0x1,%eax
  je     L207
  cmp    $0x1,%eax
  je     L204
  mov    %ebp,%eax
  lea    -0x1(%rbp),%ebx
  xor    %r14d,%r14d
  mov    %ecx,%ebp
  mov    %eax,%ecx
L231:
  mov    %ebx,%r13d
  add    $0x1,%r13d
  je     L135
  cmp    $0x1,%r13d
  je     L37
  mov    %ebx,0x24(%rsp)
  xor    %r15d,%r15d
  mov    %esi,%ebx
L268:
  lea    -0x1(%r13),%edi
  mov    %ecx,0x2c(%rsp)
  mov    %edx,0x28(%rsp)
  call   <Fibonacci_rec>
  mov    0x28(%rsp),%edx
  mov    0x2c(%rsp),%ecx
  add    %eax,%r15d
  sub    $0x2,%r13d
  je     L30
  cmp    $0x1,%r13d
  jne    L268
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  add    $0x1,%r15d
L428:
  add    %r15d,%r14d
  test   %ebx,%ebx
  je     L308
  cmp    $0x1,%ebx
  jne    L135
L37:
  mov    %ecx,%eax
  add    $0x1,%r14d
  mov    %ebp,%ecx
  mov    %eax,%ebp
  add    %r14d,%r12d
  test   %ebp,%ebp
  je     L237
L473:
  cmp    $0x1,%ebp
  jne    L207
L204:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  add    $0x1,%ebx
L161:
  add    %ebx,%ecx
  test   %r12d,%r12d
  jne    L342
  mov    %esi,%r15d
  mov    %ecx,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%esi
  test   %r15d,%r15d
  jne    L108
L453:
  mov    0x20(%rsp),%ecx
  add    %esi,0x1c(%rsp)
  test   %ecx,%ecx
  je     L482
L402:
  cmp    $0x1,%ecx
  je     L21
L498:
  sub    $0x2,%ecx
  jmp    L138
L207:
  sub    $0x2,%ebp
  jmp    L155
L342:
  cmp    $0x1,%r12d
  jne    L522
L298:
  mov    %ecx,%r14d
  mov    %esi,%r15d
  add    $0x1,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%esi
  test   %r15d,%r15d
  je     L453
L108:
  cmp    $0x1,%r15d
  je     L99
L286:
  sub    $0x2,%r15d
  jmp    L518
L522:
  sub    $0x2,%r12d
  jmp    L390
L308:
  mov    %ecx,%eax
  mov    %ebp,%ecx
  add    %r14d,%r12d
  mov    %eax,%ebp
  test   %ebp,%ebp
  jne    L473
L237:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  jmp    L161
  nopl   (%rax)
L30:
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  jmp    L428
L228:
  mov    (%rsp),%esi
L99:
  mov    0x20(%rsp),%ecx
  add    $0x1,%esi
  add    %esi,0x1c(%rsp)
  test   %ecx,%ecx
  jne    L402
L482:
  mov    0x1c(%rsp),%ecx
  add    %ecx,0x18(%rsp)
  mov    0xc(%rsp),%ecx
  test   %ecx,%ecx
  jne    L458
L499:
  mov    0x8(%rsp),%edx
  mov    0x18(%rsp),%ecx
  add    %ecx,0x14(%rsp)
  test   %edx,%edx
  jne    L463
L38:
  mov    0x14(%rsp),%r8d
  jmp    L262
L135:
  sub    $0x2,%ebx
  jmp    L231
L21:
  mov    0x1c(%rsp),%ecx
  add    $0x1,%ecx
  add    %ecx,0x18(%rsp)
  mov    0xc(%rsp),%ecx
  test   %ecx,%ecx
  je     L499
L458:
  cmpl   $0x1,0xc(%rsp)
  je     L211
L64:
  subl   $0x2,0xc(%rsp)
  jmp    L234
L211:
  mov    0x18(%rsp),%ecx
  mov    0x8(%rsp),%edx
  add    $0x1,%ecx
  add    %ecx,0x14(%rsp)
  test   %edx,%edx
  je     L38
L463:
  cmpl   $0x1,0x8(%rsp)
  je     L400
L362:
  subl   $0x2,0x8(%rsp)
  jmp    L398
L400:
  mov    0x14(%rsp),%r8d
  add    $0x1,%r8d
L262:
  mov    0x4(%rsp),%eax
  add    %r8d,0x10(%rsp)
  test   %eax,%eax
  je     L217
  cmpl   $0x1,0x4(%rsp)
  jne    L315
L369:
  mov    0x10(%rsp),%r10d
  add    $0x1,%r10d
L524:
  add    $0x38,%rsp
  mov    %r10d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L315:
  subl   $0x2,0x4(%rsp)
  jmp    L133
L219:
  mov    %r10d,%eax
  ret
L217:
  mov    0x10(%rsp),%r10d
  jmp    L524
```

assistant: ```c
int Fibonacci_rec(int n) {
  if (n == 0)
    return 0;
  else if (n == 1)
    return 1;
  else
    return (Fibonacci_rec(n - 1) + Fibonacci_rec(n - 2));
}
```