user: 请从给定的汇编指令推导出C源代码：

```asm
<fibo>:
  endbr64
  mov    %edi,%r10d
  test   %edi,%edi
  je     L46
  cmp    $0x1,%edi
  je     L46
  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)
L488:
  mov    0x4(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L165
  cmp    $0x1,%eax
  je     L334
  lea    -0x1(%rdi),%eax
  xor    %r8d,%r8d
  mov    %eax,0x8(%rsp)
  mov    %r8d,0x14(%rsp)
L345:
  mov    0x8(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L369
  cmp    $0x1,%eax
  je     L453
  lea    -0x1(%rdi),%eax
  xor    %ecx,%ecx
  mov    %eax,0xc(%rsp)
  mov    %ecx,0x18(%rsp)
L175:
  mov    0xc(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L395
  cmp    $0x1,%eax
  je     L52
  xor    %ecx,%ecx
  lea    -0x1(%rdi),%r8d
  mov    %ecx,0x1c(%rsp)
  mov    %r8d,%ecx
L374:
  mov    %ecx,%eax
  add    $0x1,%eax
  je     L251
  cmp    $0x1,%eax
  je     L14
  xor    %esi,%esi
  mov    %ecx,0x20(%rsp)
  lea    -0x1(%rcx),%r9d
  mov    %esi,(%rsp)
  mov    %r9d,%r15d
L28:
  mov    %r15d,%eax
  add    $0x1,%eax
  je     L458
  cmp    $0x1,%eax
  je     L419
  lea    -0x1(%r15),%r12d
  xor    %ecx,%ecx
  mov    %r15d,%esi
L194:
  mov    %r12d,%eax
  add    $0x1,%eax
  je     L76
  cmp    $0x1,%eax
  je     L498
  xor    %ebx,%ebx
  lea    -0x1(%r12),%ebp
  mov    %r12d,%edx
  mov    %ebx,%r12d
L486:
  mov    %ebp,%eax
  add    $0x1,%eax
  je     L387
  cmp    $0x1,%eax
  je     L98
  mov    %ebp,%eax
  lea    -0x1(%rbp),%ebx
  xor    %r14d,%r14d
  mov    %ecx,%ebp
  mov    %eax,%ecx
L64:
  mov    %ebx,%r13d
  add    $0x1,%r13d
  je     L526
  cmp    $0x1,%r13d
  je     L235
  mov    %ebx,0x24(%rsp)
  xor    %r15d,%r15d
  mov    %esi,%ebx
L132:
  lea    -0x1(%r13),%edi
  mov    %ecx,0x2c(%rsp)
  mov    %edx,0x28(%rsp)
  call   <fibo>
  mov    0x28(%rsp),%edx
  mov    0x2c(%rsp),%ecx
  add    %eax,%r15d
  sub    $0x2,%r13d
  je     L470
  cmp    $0x1,%r13d
  jne    L132
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  add    $0x1,%r15d
L55:
  add    %r15d,%r14d
  test   %ebx,%ebx
  je     L9
  cmp    $0x1,%ebx
  jne    L526
L235:
  mov    %ecx,%eax
  add    $0x1,%r14d
  mov    %ebp,%ecx
  mov    %eax,%ebp
  add    %r14d,%r12d
  test   %ebp,%ebp
  je     L209
L133:
  cmp    $0x1,%ebp
  jne    L387
L98:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  add    $0x1,%ebx
L385:
  add    %ebx,%ecx
  test   %r12d,%r12d
  jne    L263
  mov    %esi,%r15d
  mov    %ecx,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%esi
  test   %r15d,%r15d
  jne    L102
L54:
  mov    0x20(%rsp),%ecx
  add    %esi,0x1c(%rsp)
  test   %ecx,%ecx
  je     L445
L344:
  cmp    $0x1,%ecx
  je     L14
L251:
  sub    $0x2,%ecx
  jmp    L374
L387:
  sub    $0x2,%ebp
  jmp    L486
L263:
  cmp    $0x1,%r12d
  jne    L76
L498:
  mov    %ecx,%r14d
  mov    %esi,%r15d
  add    $0x1,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%esi
  test   %r15d,%r15d
  je     L54
L102:
  cmp    $0x1,%r15d
  je     L284
L458:
  sub    $0x2,%r15d
  jmp    L28
L76:
  sub    $0x2,%r12d
  jmp    L194
L9:
  mov    %ecx,%eax
  mov    %ebp,%ecx
  add    %r14d,%r12d
  mov    %eax,%ebp
  test   %ebp,%ebp
  jne    L133
L209:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  jmp    L385
  nopl   (%rax)
L470:
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  jmp    L55
L419:
  mov    (%rsp),%esi
L284:
  mov    0x20(%rsp),%ecx
  add    $0x1,%esi
  add    %esi,0x1c(%rsp)
  test   %ecx,%ecx
  jne    L344
L445:
  mov    0x1c(%rsp),%ecx
  add    %ecx,0x18(%rsp)
  mov    0xc(%rsp),%ecx
  test   %ecx,%ecx
  jne    L451
L380:
  mov    0x8(%rsp),%edx
  mov    0x18(%rsp),%ecx
  add    %ecx,0x14(%rsp)
  test   %edx,%edx
  jne    L285
L494:
  mov    0x14(%rsp),%r8d
  jmp    L313
L526:
  sub    $0x2,%ebx
  jmp    L64
L14:
  mov    0x1c(%rsp),%ecx
  add    $0x1,%ecx
  add    %ecx,0x18(%rsp)
  mov    0xc(%rsp),%ecx
  test   %ecx,%ecx
  je     L380
L451:
  cmpl   $0x1,0xc(%rsp)
  je     L52
L395:
  subl   $0x2,0xc(%rsp)
  jmp    L175
L52:
  mov    0x18(%rsp),%ecx
  mov    0x8(%rsp),%edx
  add    $0x1,%ecx
  add    %ecx,0x14(%rsp)
  test   %edx,%edx
  je     L494
L285:
  cmpl   $0x1,0x8(%rsp)
  je     L453
L369:
  subl   $0x2,0x8(%rsp)
  jmp    L345
L453:
  mov    0x14(%rsp),%r8d
  add    $0x1,%r8d
L313:
  mov    0x4(%rsp),%eax
  add    %r8d,0x10(%rsp)
  test   %eax,%eax
  je     L417
  cmpl   $0x1,0x4(%rsp)
  jne    L165
L334:
  mov    0x10(%rsp),%r10d
  add    $0x1,%r10d
L333:
  add    $0x38,%rsp
  mov    %r10d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L165:
  subl   $0x2,0x4(%rsp)
  jmp    L488
L46:
  mov    %r10d,%eax
  ret
L417:
  mov    0x10(%rsp),%r10d
  jmp    L333
```

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