user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<fib>:
  endbr64
  mov    %edi,%r10d
  test   %edi,%edi
  je     L499
  cmp    $0x1,%edi
  je     L499
  push   %r15
  lea    -0x2(%rdi),%eax
  xor    %r10d,%r10d
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x38,%rsp
  mov    %eax,0x8(%rsp)
  mov    %r10d,0x10(%rsp)
L305:
  mov    0x8(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L401
  cmp    $0x1,%eax
  je     L36
  lea    -0x1(%rdi),%eax
  xor    %r8d,%r8d
  mov    %eax,0x4(%rsp)
  mov    %r8d,0x14(%rsp)
L330:
  mov    0x4(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L250
  cmp    $0x1,%eax
  je     L360
  lea    -0x1(%rdi),%eax
  xor    %ecx,%ecx
  mov    %eax,0xc(%rsp)
  mov    %ecx,0x18(%rsp)
L479:
  mov    0xc(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L187
  cmp    $0x1,%eax
  je     L86
  xor    %ecx,%ecx
  lea    -0x1(%rdi),%r8d
  mov    %ecx,0x1c(%rsp)
  mov    %r8d,%ecx
L2:
  mov    %ecx,%eax
  add    $0x1,%eax
  je     L15
  cmp    $0x1,%eax
  je     L210
  xor    %esi,%esi
  mov    %ecx,0x20(%rsp)
  lea    -0x1(%rcx),%r9d
  mov    %esi,(%rsp)
  mov    %r9d,%r15d
L312:
  mov    %r15d,%eax
  add    $0x1,%eax
  je     L309
  cmp    $0x1,%eax
  je     L126
  lea    -0x1(%r15),%r12d
  xor    %ecx,%ecx
  mov    %r15d,%esi
L151:
  mov    %r12d,%eax
  add    $0x1,%eax
  je     L3
  cmp    $0x1,%eax
  je     L322
  xor    %ebx,%ebx
  lea    -0x1(%r12),%ebp
  mov    %r12d,%edx
  mov    %ebx,%r12d
L48:
  mov    %ebp,%eax
  add    $0x1,%eax
  je     L353
  cmp    $0x1,%eax
  je     L203
  mov    %ebp,%eax
  lea    -0x1(%rbp),%ebx
  xor    %r14d,%r14d
  mov    %ecx,%ebp
  mov    %eax,%ecx
L470:
  mov    %ebx,%r13d
  add    $0x1,%r13d
  je     L287
  cmp    $0x1,%r13d
  je     L162
  mov    %ebx,0x24(%rsp)
  xor    %r15d,%r15d
  mov    %esi,%ebx
L121:
  lea    -0x1(%r13),%edi
  mov    %ecx,0x2c(%rsp)
  mov    %edx,0x28(%rsp)
  call   <fib>
  mov    0x28(%rsp),%edx
  mov    0x2c(%rsp),%ecx
  add    %eax,%r15d
  sub    $0x2,%r13d
  je     L158
  cmp    $0x1,%r13d
  jne    L121
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  add    $0x1,%r15d
L110:
  add    %r15d,%r14d
  test   %ebx,%ebx
  je     L20
  cmp    $0x1,%ebx
  jne    L287
L162:
  mov    %ecx,%eax
  add    $0x1,%r14d
  mov    %ebp,%ecx
  mov    %eax,%ebp
  add    %r14d,%r12d
  test   %ebp,%ebp
  je     L204
L335:
  cmp    $0x1,%ebp
  jne    L353
L203:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  add    $0x1,%ebx
L358:
  add    %ebx,%ecx
  test   %r12d,%r12d
  jne    L198
  mov    %esi,%r15d
  mov    %ecx,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%esi
  test   %r15d,%r15d
  jne    L205
L276:
  mov    0x20(%rsp),%ecx
  add    %esi,0x1c(%rsp)
  test   %ecx,%ecx
  je     L130
L340:
  cmp    $0x1,%ecx
  je     L210
L15:
  sub    $0x2,%ecx
  jmp    L2
L353:
  sub    $0x2,%ebp
  jmp    L48
L198:
  cmp    $0x1,%r12d
  jne    L3
L322:
  mov    %ecx,%r14d
  mov    %esi,%r15d
  add    $0x1,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%esi
  test   %r15d,%r15d
  je     L276
L205:
  cmp    $0x1,%r15d
  je     L126
L309:
  sub    $0x2,%r15d
  jmp    L312
L3:
  sub    $0x2,%r12d
  jmp    L151
L20:
  mov    %ecx,%eax
  mov    %ebp,%ecx
  add    %r14d,%r12d
  mov    %eax,%ebp
  test   %ebp,%ebp
  jne    L335
L204:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  jmp    L358
  nopl   (%rax)
L158:
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  jmp    L110
L126:
  mov    (%rsp),%esi
  mov    0x20(%rsp),%ecx
  add    $0x1,%esi
  add    %esi,0x1c(%rsp)
  test   %ecx,%ecx
  jne    L340
L130:
  mov    0x1c(%rsp),%ecx
  add    %ecx,0x18(%rsp)
  mov    0xc(%rsp),%ecx
  test   %ecx,%ecx
  jne    L268
L240:
  mov    0x4(%rsp),%edx
  mov    0x18(%rsp),%ecx
  add    %ecx,0x14(%rsp)
  test   %edx,%edx
  jne    L526
L495:
  mov    0x14(%rsp),%r8d
  jmp    L96
L287:
  sub    $0x2,%ebx
  jmp    L470
L210:
  mov    0x1c(%rsp),%ecx
  add    $0x1,%ecx
  add    %ecx,0x18(%rsp)
  mov    0xc(%rsp),%ecx
  test   %ecx,%ecx
  je     L240
L268:
  cmpl   $0x1,0xc(%rsp)
  je     L86
L187:
  subl   $0x2,0xc(%rsp)
  jmp    L479
L86:
  mov    0x18(%rsp),%ecx
  mov    0x4(%rsp),%edx
  add    $0x1,%ecx
  add    %ecx,0x14(%rsp)
  test   %edx,%edx
  je     L495
L526:
  cmpl   $0x1,0x4(%rsp)
  je     L360
L250:
  subl   $0x2,0x4(%rsp)
  jmp    L330
L360:
  mov    0x14(%rsp),%r8d
  add    $0x1,%r8d
L96:
  mov    0x8(%rsp),%eax
  add    %r8d,0x10(%rsp)
  test   %eax,%eax
  je     L302
  cmpl   $0x1,0x8(%rsp)
  jne    L401
L36:
  mov    0x10(%rsp),%r10d
  add    $0x1,%r10d
L419:
  add    $0x38,%rsp
  mov    %r10d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L401:
  subl   $0x2,0x8(%rsp)
  jmp    L305
L499:
  mov    %r10d,%eax
  ret
L302:
  mov    0x10(%rsp),%r10d
  jmp    L419
```

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