user: 这段汇编代码用C语言表示是什么样的?

```asm
<fibonacci>:
  endbr64
  mov    %rdi,%r10
  test   %rdi,%rdi
  je     L30
  cmp    $0x1,%rdi
  je     L30
  push   %r15
  lea    -0x2(%rdi),%rax
  xor    %r10d,%r10d
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x68,%rsp
  mov    %rax,0x8(%rsp)
  mov    %r10,0x20(%rsp)
L475:
  mov    0x8(%rsp),%rdi
  mov    %rdi,%rax
  add    $0x1,%rax
  je     L446
  cmp    $0x1,%rax
  je     L169
  lea    -0x1(%rdi),%rax
  xor    %r8d,%r8d
  mov    %rax,0x10(%rsp)
  mov    %r8,0x28(%rsp)
L196:
  mov    0x10(%rsp),%rdi
  mov    %rdi,%rax
  add    $0x1,%rax
  je     L339
  cmp    $0x1,%rax
  je     L324
  lea    -0x1(%rdi),%rax
  xor    %ecx,%ecx
  mov    %rax,0x18(%rsp)
  mov    %rcx,0x30(%rsp)
L216:
  mov    0x18(%rsp),%rdi
  mov    %rdi,%rax
  add    $0x1,%rax
  je     L311
  cmp    $0x1,%rax
  je     L476
  xor    %ecx,%ecx
  lea    -0x1(%rdi),%r8
  mov    %rcx,0x38(%rsp)
  mov    %r8,%rcx
L282:
  mov    %rcx,%rax
  add    $0x1,%rax
  je     L417
  cmp    $0x1,%rax
  je     L64
  xor    %esi,%esi
  mov    %rcx,0x40(%rsp)
  lea    -0x1(%rcx),%r9
  mov    %rsi,(%rsp)
  mov    %r9,%r15
L524:
  mov    %r15,%rax
  add    $0x1,%rax
  je     L120
  cmp    $0x1,%rax
  je     L518
  lea    -0x1(%r15),%r12
  xor    %ecx,%ecx
  mov    %r15,%rsi
L151:
  mov    %r12,%rax
  add    $0x1,%rax
  je     L14
  cmp    $0x1,%rax
  je     L38
  xor    %ebx,%ebx
  lea    -0x1(%r12),%rbp
  mov    %r12,%rdx
  mov    %rbx,%r12
L21:
  mov    %rbp,%rax
  add    $0x1,%rax
  je     L365
  cmp    $0x1,%rax
  je     L163
  mov    %rbp,%rax
  lea    -0x1(%rbp),%rbx
  xor    %r14d,%r14d
  mov    %rcx,%rbp
  mov    %rax,%rcx
L158:
  mov    %rbx,%r13
  add    $0x1,%r13
  je     L25
  cmp    $0x1,%r13
  je     L310
  mov    %rbx,0x48(%rsp)
  xor    %r15d,%r15d
  mov    %rsi,%rbx
L399:
  lea    -0x1(%r13),%rdi
  mov    %rcx,0x58(%rsp)
  mov    %rdx,0x50(%rsp)
  call   <fibonacci>
  mov    0x50(%rsp),%rdx
  mov    0x58(%rsp),%rcx
  add    %rax,%r15
  sub    $0x2,%r13
  je     L19
  cmp    $0x1,%r13
  jne    L399
  mov    %rbx,%rsi
  mov    0x48(%rsp),%rbx
  add    $0x1,%r15
L238:
  add    %r15,%r14
  test   %rbx,%rbx
  je     L157
  cmp    $0x1,%rbx
  jne    L25
L310:
  mov    %rcx,%rax
  add    $0x1,%r14
  mov    %rbp,%rcx
  mov    %rax,%rbp
  add    %r14,%r12
  test   %rbp,%rbp
  je     L164
L56:
  cmp    $0x1,%rbp
  jne    L365
L163:
  mov    %r12,%rbx
  mov    %rdx,%r12
  add    $0x1,%rbx
L506:
  add    %rbx,%rcx
  test   %r12,%r12
  jne    L61
  mov    %rsi,%r15
  mov    %rcx,%r14
  add    %r14,(%rsp)
  mov    (%rsp),%rsi
  test   %r15,%r15
  jne    L37
L121:
  mov    0x40(%rsp),%rcx
  add    %rsi,0x38(%rsp)
  test   %rcx,%rcx
  je     L160
L167:
  cmp    $0x1,%rcx
  je     L64
L417:
  sub    $0x2,%rcx
  jmp    L282
L365:
  sub    $0x2,%rbp
  jmp    L21
L61:
  cmp    $0x1,%r12
  jne    L14
L38:
  mov    %rcx,%r14
  mov    %rsi,%r15
  add    $0x1,%r14
  add    %r14,(%rsp)
  mov    (%rsp),%rsi
  test   %r15,%r15
  je     L121
L37:
  cmp    $0x1,%r15
  je     L86
L120:
  sub    $0x2,%r15
  jmp    L524
L14:
  sub    $0x2,%r12
  jmp    L151
L157:
  mov    %rcx,%rax
  mov    %rbp,%rcx
  add    %r14,%r12
  mov    %rax,%rbp
  test   %rbp,%rbp
  jne    L56
L164:
  mov    %r12,%rbx
  mov    %rdx,%r12
  jmp    L506
  nopl   0x0(%rax,%rax,1)
L19:
  mov    %rbx,%rsi
  mov    0x48(%rsp),%rbx
  jmp    L238
L518:
  mov    (%rsp),%rsi
L86:
  mov    0x40(%rsp),%rcx
  add    $0x1,%rsi
  add    %rsi,0x38(%rsp)
  test   %rcx,%rcx
  jne    L167
L160:
  mov    0x38(%rsp),%rcx
  add    %rcx,0x30(%rsp)
  cmpq   $0x0,0x18(%rsp)
  jne    L416
L346:
  mov    0x30(%rsp),%rcx
  add    %rcx,0x28(%rsp)
  cmpq   $0x0,0x10(%rsp)
  jne    L95
L54:
  mov    0x28(%rsp),%r8
  jmp    L69
  nopl   0x0(%rax,%rax,1)
L25:
  sub    $0x2,%rbx
  jmp    L158
L64:
  mov    0x38(%rsp),%rcx
  add    $0x1,%rcx
  add    %rcx,0x30(%rsp)
  cmpq   $0x0,0x18(%rsp)
  je     L346
L416:
  cmpq   $0x1,0x18(%rsp)
  je     L476
L311:
  subq   $0x2,0x18(%rsp)
  jmp    L216
L476:
  mov    0x30(%rsp),%rcx
  add    $0x1,%rcx
  add    %rcx,0x28(%rsp)
  cmpq   $0x0,0x10(%rsp)
  je     L54
L95:
  cmpq   $0x1,0x10(%rsp)
  je     L324
L339:
  subq   $0x2,0x10(%rsp)
  jmp    L196
L324:
  mov    0x28(%rsp),%r8
  add    $0x1,%r8
L69:
  add    %r8,0x20(%rsp)
  cmpq   $0x0,0x8(%rsp)
  je     L421
  cmpq   $0x1,0x8(%rsp)
  jne    L446
L169:
  mov    0x20(%rsp),%r10
  add    $0x1,%r10
L42:
  add    $0x68,%rsp
  mov    %r10,%rax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L446:
  subq   $0x2,0x8(%rsp)
  jmp    L475
L30:
  mov    %r10,%rax
  ret
L421:
  mov    0x20(%rsp),%r10
  jmp    L42
```

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