user: Please show me the C implementation that matches the assembly code listed below:

```asm
<fibonacci>:
  endbr64
  mov    %edi,%r10d
  test   %edi,%edi
  je     L389
  cmp    $0x1,%edi
  je     L389
  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)
L254:
  mov    0x4(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L171
  cmp    $0x1,%eax
  je     L48
  lea    -0x1(%rdi),%eax
  xor    %r8d,%r8d
  mov    %eax,0x8(%rsp)
  mov    %r8d,0x14(%rsp)
L218:
  mov    0x8(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L23
  cmp    $0x1,%eax
  je     L370
  lea    -0x1(%rdi),%eax
  xor    %ecx,%ecx
  mov    %eax,0xc(%rsp)
  mov    %ecx,0x18(%rsp)
L271:
  mov    0xc(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L233
  cmp    $0x1,%eax
  je     L259
  xor    %ecx,%ecx
  lea    -0x1(%rdi),%r8d
  mov    %ecx,0x1c(%rsp)
  mov    %r8d,%ecx
L4:
  mov    %ecx,%eax
  add    $0x1,%eax
  je     L314
  cmp    $0x1,%eax
  je     L480
  xor    %esi,%esi
  mov    %ecx,0x20(%rsp)
  lea    -0x1(%rcx),%r9d
  mov    %esi,(%rsp)
  mov    %r9d,%r15d
L365:
  mov    %r15d,%eax
  add    $0x1,%eax
  je     L374
  cmp    $0x1,%eax
  je     L5
  lea    -0x1(%r15),%r12d
  xor    %ecx,%ecx
  mov    %r15d,%esi
L40:
  mov    %r12d,%eax
  add    $0x1,%eax
  je     L351
  cmp    $0x1,%eax
  je     L403
  xor    %ebx,%ebx
  lea    -0x1(%r12),%ebp
  mov    %r12d,%edx
  mov    %ebx,%r12d
L51:
  mov    %ebp,%eax
  add    $0x1,%eax
  je     L167
  cmp    $0x1,%eax
  je     L216
  mov    %ebp,%eax
  lea    -0x1(%rbp),%ebx
  xor    %r14d,%r14d
  mov    %ecx,%ebp
  mov    %eax,%ecx
L125:
  mov    %ebx,%r13d
  add    $0x1,%r13d
  je     L336
  cmp    $0x1,%r13d
  je     L474
  mov    %ebx,0x24(%rsp)
  xor    %r15d,%r15d
  mov    %esi,%ebx
L108:
  lea    -0x1(%r13),%edi
  mov    %ecx,0x2c(%rsp)
  mov    %edx,0x28(%rsp)
  call   <fibonacci>
  mov    0x28(%rsp),%edx
  mov    0x2c(%rsp),%ecx
  add    %eax,%r15d
  sub    $0x2,%r13d
  je     L315
  cmp    $0x1,%r13d
  jne    L108
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  add    $0x1,%r15d
L507:
  add    %r15d,%r14d
  test   %ebx,%ebx
  je     L129
  cmp    $0x1,%ebx
  jne    L336
L474:
  mov    %ecx,%eax
  add    $0x1,%r14d
  mov    %ebp,%ecx
  mov    %eax,%ebp
  add    %r14d,%r12d
  test   %ebp,%ebp
  je     L344
L154:
  cmp    $0x1,%ebp
  jne    L167
L216:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  add    $0x1,%ebx
L449:
  add    %ebx,%ecx
  test   %r12d,%r12d
  jne    L238
  mov    %esi,%r15d
  mov    %ecx,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%esi
  test   %r15d,%r15d
  jne    L58
L160:
  mov    0x20(%rsp),%ecx
  add    %esi,0x1c(%rsp)
  test   %ecx,%ecx
  je     L424
L327:
  cmp    $0x1,%ecx
  je     L480
L314:
  sub    $0x2,%ecx
  jmp    L4
L167:
  sub    $0x2,%ebp
  jmp    L51
L238:
  cmp    $0x1,%r12d
  jne    L351
L403:
  mov    %ecx,%r14d
  mov    %esi,%r15d
  add    $0x1,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%esi
  test   %r15d,%r15d
  je     L160
L58:
  cmp    $0x1,%r15d
  je     L402
L374:
  sub    $0x2,%r15d
  jmp    L365
L351:
  sub    $0x2,%r12d
  jmp    L40
L129:
  mov    %ecx,%eax
  mov    %ebp,%ecx
  add    %r14d,%r12d
  mov    %eax,%ebp
  test   %ebp,%ebp
  jne    L154
L344:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  jmp    L449
  nopl   (%rax)
L315:
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  jmp    L507
L5:
  mov    (%rsp),%esi
L402:
  mov    0x20(%rsp),%ecx
  add    $0x1,%esi
  add    %esi,0x1c(%rsp)
  test   %ecx,%ecx
  jne    L327
L424:
  mov    0x1c(%rsp),%ecx
  add    %ecx,0x18(%rsp)
  mov    0xc(%rsp),%ecx
  test   %ecx,%ecx
  jne    L209
L348:
  mov    0x8(%rsp),%edx
  mov    0x18(%rsp),%ecx
  add    %ecx,0x14(%rsp)
  test   %edx,%edx
  jne    L231
L313:
  mov    0x14(%rsp),%r8d
  jmp    L285
L336:
  sub    $0x2,%ebx
  jmp    L125
L480:
  mov    0x1c(%rsp),%ecx
  add    $0x1,%ecx
  add    %ecx,0x18(%rsp)
  mov    0xc(%rsp),%ecx
  test   %ecx,%ecx
  je     L348
L209:
  cmpl   $0x1,0xc(%rsp)
  je     L259
L233:
  subl   $0x2,0xc(%rsp)
  jmp    L271
L259:
  mov    0x18(%rsp),%ecx
  mov    0x8(%rsp),%edx
  add    $0x1,%ecx
  add    %ecx,0x14(%rsp)
  test   %edx,%edx
  je     L313
L231:
  cmpl   $0x1,0x8(%rsp)
  je     L370
L23:
  subl   $0x2,0x8(%rsp)
  jmp    L218
L370:
  mov    0x14(%rsp),%r8d
  add    $0x1,%r8d
L285:
  mov    0x4(%rsp),%eax
  add    %r8d,0x10(%rsp)
  test   %eax,%eax
  je     L408
  cmpl   $0x1,0x4(%rsp)
  jne    L171
L48:
  mov    0x10(%rsp),%r10d
  add    $0x1,%r10d
L249:
  add    $0x38,%rsp
  mov    %r10d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L171:
  subl   $0x2,0x4(%rsp)
  jmp    L254
L389:
  mov    %r10d,%eax
  ret
L408:
  mov    0x10(%rsp),%r10d
  jmp    L249
```

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