user: 下面的汇编指令对应的C源代码是什么:

```asm
<fibo>:
  endbr64
  push   %r15
  push   %r14
  mov    %edi,%r14d
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x58,%rsp
  mov    %edi,0x4(%rsp)
  movl   $0x0,0x10(%rsp)
  cmp    $0x1,%edi
  jbe    L215
  mov    %edi,0x30(%rsp)
L186:
  cmpl   $0x2,0x4(%rsp)
  je     L316
  mov    0x4(%rsp),%eax
  movl   $0x0,0x14(%rsp)
  sub    $0x2,%eax
  mov    %eax,0x8(%rsp)
  cmpl   $0x1,0x8(%rsp)
  mov    %eax,0x20(%rsp)
  je     L276
L262:
  mov    0x8(%rsp),%eax
  movl   $0x0,0x18(%rsp)
  sub    $0x1,%eax
  mov    %eax,0xc(%rsp)
  cmpl   $0x1,0xc(%rsp)
  mov    %eax,0x24(%rsp)
  je     L140
L273:
  mov    0xc(%rsp),%eax
  movl   $0x0,0x1c(%rsp)
  sub    $0x1,%eax
  mov    %eax,%r11d
  mov    %eax,0x28(%rsp)
  cmp    $0x1,%r11d
  je     L229
L172:
  lea    -0x1(%r11),%eax
  xor    %r15d,%r15d
  mov    %eax,%ebx
  mov    %eax,0x2c(%rsp)
  cmp    $0x1,%ebx
  je     L17
L12:
  lea    -0x1(%rbx),%r14d
  xor    %edx,%edx
  mov    %r14d,%r12d
L129:
  cmp    $0x1,%r12d
  je     L295
  lea    -0x2(%r12),%r13d
  xor    %ecx,%ecx
  mov    %r13d,%esi
L9:
  mov    %esi,%ebp
  xor    %r8d,%r8d
  test   %esi,%esi
  je     L52
  mov    %ebp,%r10d
  xor    %r9d,%r9d
  cmp    $0x1,%ebp
  je     L112
  nopl   0x0(%rax)
L268:
  lea    -0x1(%r10),%edi
  mov    %esi,0x4c(%rsp)
  mov    %r11d,0x48(%rsp)
  mov    %r9d,0x44(%rsp)
  mov    %r8d,0x40(%rsp)
  mov    %ecx,0x3c(%rsp)
  mov    %edx,0x38(%rsp)
  mov    %r10d,0x34(%rsp)
  call   <fibo>
  mov    0x34(%rsp),%r10d
  mov    0x44(%rsp),%r9d
  mov    0x38(%rsp),%edx
  mov    0x3c(%rsp),%ecx
  sub    $0x2,%r10d
  add    %eax,%r9d
  mov    0x40(%rsp),%r8d
  mov    0x4c(%rsp),%esi
  cmp    $0x1,%r10d
  mov    0x48(%rsp),%r11d
  ja     L268
  mov    %ebp,%eax
  lea    -0x2(%rbp),%edi
  sub    $0x1,%ebp
  and    $0x1,%eax
  add    %r9d,%eax
  add    %eax,%r8d
  cmp    $0x1,%ebp
  jbe    L23
L45:
  mov    %edi,%ebp
  xor    %r9d,%r9d
  mov    %ebp,%r10d
  cmp    $0x1,%ebp
  jne    L268
L112:
  mov    $0x1,%eax
  sub    $0x1,%ebp
  mov    $0xffffffff,%edi
  add    %eax,%r8d
  cmp    $0x1,%ebp
  ja     L45
L23:
  lea    -0x1(%rsi),%eax
  and    $0x1,%eax
  add    %r8d,%eax
  add    %eax,%ecx
  lea    -0x2(%rsi),%eax
  cmp    $0x1,%esi
  ja     L177
L61:
  mov    %r13d,%eax
  sub    $0x1,%r12d
  and    $0x1,%eax
  add    %ecx,%eax
  add    %eax,%edx
  cmp    $0x1,%r12d
  ja     L133
L266:
  lea    -0x2(%rbx),%ecx
  and    $0x1,%ebx
  lea    (%rbx,%rdx,1),%eax
  add    %eax,%r15d
  cmp    $0x1,%r14d
  jbe    L187
L130:
  mov    %ecx,%ebx
  cmp    $0x1,%ebx
  jne    L12
L17:
  mov    $0x1,%eax
  xor    %r14d,%r14d
  mov    $0xffffffff,%ecx
  add    %eax,%r15d
  cmp    $0x1,%r14d
  ja     L130
L187:
  mov    %r11d,%eax
  lea    -0x2(%r11),%edx
  and    $0x1,%eax
  add    %r15d,%eax
  add    %eax,0x1c(%rsp)
  cmpl   $0x1,0x2c(%rsp)
  jbe    L156
L38:
  mov    %edx,%r11d
  cmp    $0x1,%r11d
  jne    L172
L229:
  movl   $0x0,0x2c(%rsp)
  mov    $0x1,%eax
  mov    $0xffffffff,%edx
  add    %eax,0x1c(%rsp)
  cmpl   $0x1,0x2c(%rsp)
  ja     L38
L156:
  mov    0xc(%rsp),%eax
  lea    -0x2(%rax),%edx
  and    $0x1,%eax
  add    0x1c(%rsp),%eax
  add    %eax,0x18(%rsp)
  cmpl   $0x1,0x28(%rsp)
  jbe    L11
L65:
  mov    %edx,0xc(%rsp)
  cmpl   $0x1,0xc(%rsp)
  jne    L273
L140:
  movl   $0x0,0x28(%rsp)
  mov    $0x1,%eax
  mov    $0xffffffff,%edx
  add    %eax,0x18(%rsp)
  cmpl   $0x1,0x28(%rsp)
  ja     L65
L11:
  mov    0x8(%rsp),%eax
  lea    -0x2(%rax),%edx
  and    $0x1,%eax
  add    0x18(%rsp),%eax
  add    %eax,0x14(%rsp)
  cmpl   $0x1,0x24(%rsp)
  jbe    L222
L236:
  mov    %edx,0x8(%rsp)
  cmpl   $0x1,0x8(%rsp)
  jne    L262
L276:
  movl   $0x0,0x24(%rsp)
  mov    $0x1,%eax
  mov    $0xffffffff,%edx
  add    %eax,0x14(%rsp)
  cmpl   $0x1,0x24(%rsp)
  ja     L236
L222:
  mov    0x4(%rsp),%eax
  sub    $0x3,%eax
  and    $0x1,%eax
  add    0x14(%rsp),%eax
L105:
  mov    0x20(%rsp),%edi
  add    %eax,0x10(%rsp)
  mov    %edi,0x4(%rsp)
  cmp    $0x1,%edi
  ja     L186
  mov    0x30(%rsp),%eax
  mov    0x10(%rsp),%r14d
  and    $0x1,%eax
  add    %eax,%r14d
L215:
  add    $0x58,%rsp
  mov    %r14d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L295:
  mov    $0x1,%eax
  sub    $0x1,%r12d
  mov    $0xffffffff,%r13d
  add    %eax,%edx
  cmp    $0x1,%r12d
  jbe    L266
L133:
  mov    %r13d,%r12d
  jmp    L129
  nopl   0x0(%rax,%rax,1)
L52:
  mov    $0x1,%eax
  add    %eax,%ecx
  lea    -0x2(%rsi),%eax
  cmp    $0x1,%esi
  jbe    L61
L177:
  mov    %eax,%esi
  jmp    L9
L316:
  movl   $0x0,0x20(%rsp)
  mov    $0x1,%eax
  jmp    L105
```

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