user: What is the c source code of the assembly code below?

```asm
<fibo>:
  endbr64
  cmp    $0x1,%edi
  je     L161
  mov    %edi,%ecx
  cmp    $0x2,%edi
  je     L95
  mov    $0x0,%r9d
  jle    L202
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x38,%rsp
  mov    %r9d,0x8(%rsp)
L120:
  movl   $0x0,(%rsp)
  lea    -0x1(%rcx),%r9d
  mov    %ecx,0xc(%rsp)
L12:
  cmp    $0x2,%r9d
  je     L139
  movl   $0x0,0x4(%rsp)
  lea    -0x1(%r9),%edx
  mov    %r9d,0x10(%rsp)
L80:
  cmp    $0x2,%edx
  je     L294
  lea    -0x1(%rdx),%r13d
  xor    %r12d,%r12d
  mov    %r13d,%r10d
  mov    %r12d,%r11d
L255:
  cmp    $0x2,%r10d
  je     L116
  lea    -0x1(%r10),%r15d
  xor    %r14d,%r14d
  mov    %r15d,%r8d
  mov    %r14d,%r9d
L141:
  cmp    $0x2,%r8d
  je     L190
  lea    -0x1(%r8),%r13d
  xor    %esi,%esi
  mov    %r13d,%ecx
L253:
  cmp    $0x2,%ecx
  je     L286
  lea    -0x1(%rcx),%r14d
  xor    %ebx,%ebx
L198:
  cmp    $0x2,%r14d
  je     L279
  lea    -0x1(%r14),%ebp
  xor    %r12d,%r12d
L301:
  cmp    $0x2,%ebp
  je     L175
  mov    %r14d,0x14(%rsp)
  lea    -0x1(%rbp),%r15d
  xor    %r13d,%r13d
  mov    %r8d,%r14d
  mov    %ebx,0x18(%rsp)
  mov    %edx,%ebx
  mov    %r12d,0x1c(%rsp)
  mov    %r11d,%r12d
  mov    %ebp,0x20(%rsp)
  mov    %r10d,%ebp
L246:
  cmp    $0x2,%r15d
  je     L152
  lea    -0x1(%r15),%edi
  mov    %ecx,0x2c(%rsp)
  sub    $0x2,%r15d
  mov    %esi,0x28(%rsp)
  mov    %r9d,0x24(%rsp)
  call   <fibo>
  mov    0x24(%rsp),%r9d
  mov    0x28(%rsp),%esi
  add    %eax,%r13d
  cmp    $0x1,%r15d
  mov    0x2c(%rsp),%ecx
  jne    L246
  mov    %ebx,%edx
  mov    %ebp,%r10d
  mov    %r12d,%r11d
  mov    %r14d,%r8d
  mov    0x18(%rsp),%ebx
  mov    0x14(%rsp),%r14d
  mov    0x1c(%rsp),%r12d
  mov    0x20(%rsp),%ebp
L115:
  sub    $0x2,%ebp
  add    %r13d,%r12d
  cmp    $0x1,%ebp
  jne    L301
L300:
  sub    $0x2,%r14d
  add    %r12d,%ebx
  cmp    $0x1,%r14d
  jne    L198
L168:
  sub    $0x2,%ecx
  add    %ebx,%esi
  cmp    $0x1,%ecx
  jne    L253
  mov    %esi,%r12d
L55:
  sub    $0x2,%r8d
  add    %r12d,%r9d
  cmp    $0x1,%r8d
  jne    L141
  mov    %r9d,%r14d
L24:
  sub    $0x2,%r10d
  add    %r14d,%r11d
  cmp    $0x1,%r10d
  jne    L255
  mov    %r11d,%r12d
L272:
  sub    $0x2,%edx
  add    %r12d,0x4(%rsp)
  cmp    $0x1,%edx
  jne    L80
  mov    0x10(%rsp),%r9d
L243:
  sub    $0x2,%r9d
  mov    0x4(%rsp),%edi
  add    %edi,(%rsp)
  cmp    $0x1,%r9d
  jne    L12
  mov    0xc(%rsp),%ecx
  mov    (%rsp),%edi
  add    %edi,0x8(%rsp)
  sub    $0x2,%ecx
  cmp    $0x1,%ecx
  jne    L242
L77:
  mov    0x8(%rsp),%r9d
  jmp    L31
  nopw   0x0(%rax,%rax,1)
L279:
  add    $0x1,%ebx
  jmp    L168
L286:
  mov    %esi,%r12d
  add    $0x1,%r12d
  jmp    L55
  nopl   0x0(%rax)
L152:
  mov    %ebx,%edx
  mov    %ebp,%r10d
  mov    %r12d,%r11d
  mov    %r14d,%r8d
  mov    0x18(%rsp),%ebx
  mov    0x14(%rsp),%r14d
  add    $0x1,%r13d
  mov    0x1c(%rsp),%r12d
  mov    0x20(%rsp),%ebp
  jmp    L115
  xchg   %ax,%ax
L175:
  add    $0x1,%r12d
  jmp    L300
L190:
  mov    %r9d,%r14d
  add    $0x1,%r14d
  jmp    L24
L116:
  mov    %r11d,%r12d
  add    $0x1,%r12d
  jmp    L272
L294:
  addl   $0x1,0x4(%rsp)
  mov    0x10(%rsp),%r9d
  jmp    L243
L139:
  mov    0xc(%rsp),%ecx
  addl   $0x1,(%rsp)
  mov    (%rsp),%edi
  add    %edi,0x8(%rsp)
  sub    $0x2,%ecx
  cmp    $0x1,%ecx
  je     L77
L242:
  cmp    $0x2,%ecx
  jne    L120
  mov    0x8(%rsp),%r9d
  add    $0x1,%r9d
L31:
  add    $0x38,%rsp
  mov    %r9d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L161:
  xor    %r9d,%r9d
L202:
  mov    %r9d,%eax
  ret
L95:
  mov    $0x1,%r9d
  jmp    L202
```

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