user: 这段汇编代码用C语言表示是什么样的？

```asm
<calc_fib>:
  endbr64
  mov    %edi,%eax
  test   %edi,%edi
  je     L2
  cmp    $0x1,%edi
  je     L2
  push   %r15
  lea    -0x2(%rax),%edi
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x38,%rsp
  movl   $0x0,0x4(%rsp)
  mov    %edi,0xc(%rsp)
  cmp    $0x2,%eax
  je     L347
L394:
  sub    $0x1,%eax
  mov    %eax,0x10(%rsp)
  cmp    $0x1,%edi
  je     L288
  xor    %r10d,%r10d
  mov    %r10d,(%rsp)
L335:
  mov    0xc(%rsp),%eax
  lea    -0x2(%rax),%edi
  mov    %edi,0x8(%rsp)
  cmp    $0x2,%eax
  je     L397
  sub    $0x1,%eax
  mov    %eax,0xc(%rsp)
  cmp    $0x1,%edi
  je     L231
  xor    %esi,%esi
L502:
  mov    0x8(%rsp),%eax
  lea    -0x2(%rax),%r10d
  cmp    $0x2,%eax
  je     L533
  sub    $0x1,%eax
  mov    %eax,0x8(%rsp)
  cmp    $0x1,%r10d
  je     L536
  mov    %esi,0x14(%rsp)
  xor    %r8d,%r8d
  mov    %r8d,%r15d
L225:
  lea    -0x2(%r10),%r11d
  cmp    $0x2,%r10d
  je     L484
  sub    $0x1,%r10d
  cmp    $0x1,%r11d
  je     L23
  mov    %r10d,0x1c(%rsp)
  xor    %r9d,%r9d
  mov    %r15d,0x18(%rsp)
  mov    %r9d,%r14d
  mov    %r11d,%r15d
L497:
  lea    -0x2(%r15),%edx
  cmp    $0x2,%r15d
  je     L22
  sub    $0x1,%r15d
  cmp    $0x1,%edx
  je     L392
  xor    %r13d,%r13d
  mov    %r14d,%esi
  mov    %r15d,%r8d
  mov    %r13d,%ecx
L33:
  lea    -0x2(%rdx),%r12d
  cmp    $0x2,%edx
  je     L355
  sub    $0x1,%edx
  cmp    $0x1,%r12d
  je     L71
  xor    %ebx,%ebx
L117:
  lea    -0x2(%r12),%r13d
  cmp    $0x2,%r12d
  je     L150
L496:
  sub    $0x1,%r12d
  cmp    $0x1,%r13d
  je     L212
  xor    %ebp,%ebp
L121:
  lea    -0x2(%r13),%r15d
  cmp    $0x2,%r13d
  je     L180
L77:
  sub    $0x1,%r13d
  cmp    $0x1,%r15d
  je     L142
  mov    %r12d,0x20(%rsp)
  xor    %r14d,%r14d
  mov    %ebp,%r12d
  mov    %ecx,%ebp
  mov    %ebx,0x24(%rsp)
  mov    %esi,%ebx
  mov    %r13d,0x28(%rsp)
  mov    %r8d,%r13d
L343:
  lea    -0x2(%r15),%edi
  mov    %edx,0x2c(%rsp)
  call   <calc_fib>
  mov    0x2c(%rsp),%edx
  add    %eax,%r14d
  sub    $0x1,%r15d
  je     L39
  cmp    $0x1,%r15d
  jne    L343
  mov    %ebx,%esi
  mov    %ebp,%ecx
  mov    %r13d,%r8d
  mov    %r12d,%ebp
  mov    0x24(%rsp),%ebx
  mov    0x20(%rsp),%r12d
  add    $0x1,%r14d
  mov    0x28(%rsp),%r13d
L36:
  add    %r14d,%ebp
  test   %r13d,%r13d
  jne    L161
L94:
  add    %ebp,%ebx
  test   %r12d,%r12d
  jne    L248
  add    %ebx,%ecx
  test   %edx,%edx
  jne    L4
L291:
  mov    %esi,%r14d
  mov    %ecx,%r13d
  mov    %r8d,%r15d
L93:
  add    %r13d,%r14d
  test   %r15d,%r15d
  jne    L395
  mov    0x18(%rsp),%r15d
  mov    0x1c(%rsp),%r10d
  mov    %r14d,%r9d
  add    %r9d,%r15d
  test   %r10d,%r10d
  je     L468
L405:
  cmp    $0x1,%r10d
  jne    L225
L484:
  mov    0x14(%rsp),%esi
  mov    %r15d,%r8d
  mov    0x8(%rsp),%edi
  add    $0x1,%r8d
  add    %r8d,%esi
  test   %edi,%edi
  jne    L319
L186:
  mov    0xc(%rsp),%ecx
  add    %esi,(%rsp)
  test   %ecx,%ecx
  je     L330
L26:
  cmpl   $0x1,0xc(%rsp)
  jne    L335
L397:
  mov    (%rsp),%r10d
  mov    0x4(%rsp),%eax
  mov    0x10(%rsp),%edx
  add    $0x1,%r10d
  add    %r10d,%eax
  test   %edx,%edx
  jne    L469
L527:
  add    $0x38,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L212:
  add    $0x1,%ebx
  lea    -0x2(%r12),%r13d
  cmp    $0x2,%r12d
  jne    L496
L150:
  add    $0x1,%ebx
L140:
  add    %ebx,%ecx
  test   %edx,%edx
  je     L291
L4:
  cmp    $0x1,%edx
  jne    L33
L355:
  mov    %ecx,%r13d
  mov    %esi,%r14d
  mov    %r8d,%r15d
  add    $0x1,%r13d
  jmp    L93
L71:
  add    $0x1,%ecx
  jmp    L33
  nopw   0x0(%rax,%rax,1)
L39:
  mov    %ebx,%esi
  mov    %ebp,%ecx
  mov    %r13d,%r8d
  mov    %r12d,%ebp
  mov    0x24(%rsp),%ebx
  mov    0x20(%rsp),%r12d
  mov    0x28(%rsp),%r13d
  jmp    L36
L395:
  cmp    $0x1,%r15d
  jne    L497
L22:
  mov    0x18(%rsp),%r15d
  mov    %r14d,%r9d
  mov    0x1c(%rsp),%r10d
  add    $0x1,%r9d
  add    %r9d,%r15d
  test   %r10d,%r10d
  jne    L405
L468:
  mov    0x14(%rsp),%esi
  mov    0x8(%rsp),%edi
  mov    %r15d,%r8d
  add    %r8d,%esi
  test   %edi,%edi
  je     L186
L319:
  cmpl   $0x1,0x8(%rsp)
  jne    L502
L533:
  mov    0xc(%rsp),%ecx
  add    $0x1,%esi
  add    %esi,(%rsp)
  test   %ecx,%ecx
  jne    L26
L330:
  mov    (%rsp),%r10d
  mov    0x4(%rsp),%eax
  mov    0x10(%rsp),%edx
  add    %r10d,%eax
  test   %edx,%edx
  je     L527
L469:
  cmpl   $0x1,0x10(%rsp)
  je     L494
L216:
  mov    %eax,0x4(%rsp)
  mov    0x10(%rsp),%eax
  lea    -0x2(%rax),%edi
  mov    %edi,0xc(%rsp)
  cmp    $0x2,%eax
  jne    L394
L347:
  mov    0x4(%rsp),%eax
L494:
  add    $0x38,%rsp
  add    $0x1,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax,%rax,1)
L142:
  add    $0x1,%ebp
  lea    -0x2(%r13),%r15d
  cmp    $0x2,%r13d
  jne    L77
  nopl   0x0(%rax)
L180:
  add    $0x1,%ebp
  jmp    L94
L392:
  add    $0x1,%r14d
  jmp    L497
L23:
  add    $0x1,%r15d
  jmp    L225
L248:
  cmp    $0x1,%r12d
  jne    L117
  add    $0x1,%ebx
  jmp    L140
L161:
  cmp    $0x1,%r13d
  jne    L121
  add    $0x1,%ebp
  jmp    L94
L536:
  add    $0x1,%esi
  jmp    L502
L231:
  addl   $0x1,(%rsp)
  jmp    L335
L288:
  mov    0x4(%rsp),%eax
  add    $0x1,%eax
  jmp    L216
L2:
  ret
```

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