user: 下面的汇编指令对应的C源代码是什么：

```asm
<fnFibonacci>:
  endbr64
  mov    %edi,%r10d
  test   %edi,%edi
  je     L215
  cmp    $0x1,%edi
  je     L215
  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)
L371:
  mov    0x4(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L87
  cmp    $0x1,%eax
  je     L259
  lea    -0x1(%rdi),%eax
  xor    %r8d,%r8d
  mov    %eax,0x8(%rsp)
  mov    %r8d,0x14(%rsp)
L474:
  mov    0x8(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L395
  cmp    $0x1,%eax
  je     L156
  lea    -0x1(%rdi),%eax
  xor    %ecx,%ecx
  mov    %eax,0xc(%rsp)
  mov    %ecx,0x18(%rsp)
L144:
  mov    0xc(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L303
  cmp    $0x1,%eax
  je     L214
  xor    %ecx,%ecx
  lea    -0x1(%rdi),%r8d
  mov    %ecx,0x1c(%rsp)
  mov    %r8d,%ecx
L133:
  mov    %ecx,%eax
  add    $0x1,%eax
  je     L332
  cmp    $0x1,%eax
  je     L383
  xor    %esi,%esi
  mov    %ecx,0x20(%rsp)
  lea    -0x1(%rcx),%r9d
  mov    %esi,(%rsp)
  mov    %r9d,%r15d
L399:
  mov    %r15d,%eax
  add    $0x1,%eax
  je     L81
  cmp    $0x1,%eax
  je     L119
  lea    -0x1(%r15),%r12d
  xor    %ecx,%ecx
  mov    %r15d,%esi
L117:
  mov    %r12d,%eax
  add    $0x1,%eax
  je     L391
  cmp    $0x1,%eax
  je     L109
  xor    %ebx,%ebx
  lea    -0x1(%r12),%ebp
  mov    %r12d,%edx
  mov    %ebx,%r12d
L335:
  mov    %ebp,%eax
  add    $0x1,%eax
  je     L338
  cmp    $0x1,%eax
  je     L326
  mov    %ebp,%eax
  lea    -0x1(%rbp),%ebx
  xor    %r14d,%r14d
  mov    %ecx,%ebp
  mov    %eax,%ecx
L241:
  mov    %ebx,%r13d
  add    $0x1,%r13d
  je     L357
  cmp    $0x1,%r13d
  je     L107
  mov    %ebx,0x24(%rsp)
  xor    %r15d,%r15d
  mov    %esi,%ebx
L467:
  lea    -0x1(%r13),%edi
  mov    %ecx,0x2c(%rsp)
  mov    %edx,0x28(%rsp)
  call   <fnFibonacci>
  mov    0x28(%rsp),%edx
  mov    0x2c(%rsp),%ecx
  add    %eax,%r15d
  sub    $0x2,%r13d
  je     L218
  cmp    $0x1,%r13d
  jne    L467
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  add    $0x1,%r15d
L0:
  add    %r15d,%r14d
  test   %ebx,%ebx
  je     L333
  cmp    $0x1,%ebx
  jne    L357
L107:
  mov    %ecx,%eax
  add    $0x1,%r14d
  mov    %ebp,%ecx
  mov    %eax,%ebp
  add    %r14d,%r12d
  test   %ebp,%ebp
  je     L389
L232:
  cmp    $0x1,%ebp
  jne    L338
L326:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  add    $0x1,%ebx
L264:
  add    %ebx,%ecx
  test   %r12d,%r12d
  jne    L364
  mov    %esi,%r15d
  mov    %ecx,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%esi
  test   %r15d,%r15d
  jne    L323
L346:
  mov    0x20(%rsp),%ecx
  add    %esi,0x1c(%rsp)
  test   %ecx,%ecx
  je     L26
L500:
  cmp    $0x1,%ecx
  je     L383
L332:
  sub    $0x2,%ecx
  jmp    L133
L338:
  sub    $0x2,%ebp
  jmp    L335
L364:
  cmp    $0x1,%r12d
  jne    L391
L109:
  mov    %ecx,%r14d
  mov    %esi,%r15d
  add    $0x1,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%esi
  test   %r15d,%r15d
  je     L346
L323:
  cmp    $0x1,%r15d
  je     L145
L81:
  sub    $0x2,%r15d
  jmp    L399
L391:
  sub    $0x2,%r12d
  jmp    L117
L333:
  mov    %ecx,%eax
  mov    %ebp,%ecx
  add    %r14d,%r12d
  mov    %eax,%ebp
  test   %ebp,%ebp
  jne    L232
L389:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  jmp    L264
  nopl   (%rax)
L218:
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  jmp    L0
L119:
  mov    (%rsp),%esi
L145:
  mov    0x20(%rsp),%ecx
  add    $0x1,%esi
  add    %esi,0x1c(%rsp)
  test   %ecx,%ecx
  jne    L500
L26:
  mov    0x1c(%rsp),%ecx
  add    %ecx,0x18(%rsp)
  mov    0xc(%rsp),%ecx
  test   %ecx,%ecx
  jne    L406
L480:
  mov    0x8(%rsp),%edx
  mov    0x18(%rsp),%ecx
  add    %ecx,0x14(%rsp)
  test   %edx,%edx
  jne    L165
L217:
  mov    0x14(%rsp),%r8d
  jmp    L499
L357:
  sub    $0x2,%ebx
  jmp    L241
L383:
  mov    0x1c(%rsp),%ecx
  add    $0x1,%ecx
  add    %ecx,0x18(%rsp)
  mov    0xc(%rsp),%ecx
  test   %ecx,%ecx
  je     L480
L406:
  cmpl   $0x1,0xc(%rsp)
  je     L214
L303:
  subl   $0x2,0xc(%rsp)
  jmp    L144
L214:
  mov    0x18(%rsp),%ecx
  mov    0x8(%rsp),%edx
  add    $0x1,%ecx
  add    %ecx,0x14(%rsp)
  test   %edx,%edx
  je     L217
L165:
  cmpl   $0x1,0x8(%rsp)
  je     L156
L395:
  subl   $0x2,0x8(%rsp)
  jmp    L474
L156:
  mov    0x14(%rsp),%r8d
  add    $0x1,%r8d
L499:
  mov    0x4(%rsp),%eax
  add    %r8d,0x10(%rsp)
  test   %eax,%eax
  je     L143
  cmpl   $0x1,0x4(%rsp)
  jne    L87
L259:
  mov    0x10(%rsp),%r10d
  add    $0x1,%r10d
L413:
  add    $0x38,%rsp
  mov    %r10d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L87:
  subl   $0x2,0x4(%rsp)
  jmp    L371
L215:
  mov    %r10d,%eax
  ret
L143:
  mov    0x10(%rsp),%r10d
  jmp    L413
```

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