user: 请从给定的汇编指令推导出C源代码：

```asm
<ft_fibonacci>:
  endbr64
  test   %edi,%edi
  js     L153
  mov    %edi,%r8d
  je     L109
  cmp    $0x1,%edi
  je     L109
  push   %r15
  xor    %r8d,%r8d
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x38,%rsp
  mov    %edi,0xc(%rsp)
  mov    %r8d,(%rsp)
L219:
  mov    0xc(%rsp),%eax
  lea    -0x1(%rax),%edi
  mov    %edi,0x10(%rsp)
  cmp    $0x2,%eax
  je     L341
  xor    %r11d,%r11d
  mov    %r11d,0x4(%rsp)
L2:
  mov    0x10(%rsp),%eax
  lea    -0x1(%rax),%r11d
  cmp    $0x2,%eax
  je     L70
  xor    %ebx,%ebx
  mov    %ebx,0x8(%rsp)
L290:
  lea    -0x1(%r11),%r10d
  cmp    $0x2,%r11d
  je     L88
  xor    %r9d,%r9d
L102:
  lea    -0x1(%r10),%edx
  cmp    $0x2,%r10d
  je     L351
  xor    %r8d,%r8d
L0:
  lea    -0x1(%rdx),%ebx
  cmp    $0x2,%edx
  je     L89
  xor    %esi,%esi
L192:
  lea    -0x1(%rbx),%r13d
  cmp    $0x2,%ebx
  je     L359
  xor    %r12d,%r12d
  mov    %ebx,%ecx
  nopl   0x0(%rax)
L184:
  lea    -0x1(%r13),%r14d
  cmp    $0x2,%r13d
  je     L312
  xor    %ebp,%ebp
L278:
  lea    -0x1(%r14),%r15d
  cmp    $0x2,%r14d
  je     L37
  mov    %r13d,0x14(%rsp)
  xor    %ebx,%ebx
  mov    %r10d,%r13d
  mov    %r12d,0x18(%rsp)
  mov    %r11d,%r12d
  mov    %r14d,0x1c(%rsp)
  mov    %esi,%r14d
  jmp    L221
  nopw   0x0(%rax,%rax,1)
L160:
  cmp    $0x1,%r15d
  je     L287
L221:
  lea    -0x1(%r15),%edi
  mov    %ecx,0x2c(%rsp)
  mov    %edx,0x28(%rsp)
  mov    %r8d,0x24(%rsp)
  mov    %r9d,0x20(%rsp)
  call   <ft_fibonacci>
  mov    0x20(%rsp),%r9d
  mov    0x24(%rsp),%r8d
  add    %eax,%ebx
  sub    $0x2,%r15d
  mov    0x28(%rsp),%edx
  mov    0x2c(%rsp),%ecx
  jne    L160
  mov    %r12d,%r11d
  mov    %r13d,%r10d
  mov    %r14d,%esi
  mov    0x14(%rsp),%r13d
  mov    0x18(%rsp),%r12d
  mov    0x1c(%rsp),%r14d
L197:
  add    %ebx,%ebp
  sub    $0x2,%r14d
  je     L3
  cmp    $0x1,%r14d
  jne    L278
L37:
  add    $0x1,%ebp
L3:
  add    %ebp,%r12d
  sub    $0x2,%r13d
  je     L352
  cmp    $0x1,%r13d
  jne    L184
L312:
  add    $0x1,%r12d
  mov    %ecx,%ebx
  add    %r12d,%esi
  sub    $0x2,%ebx
  je     L120
L149:
  cmp    $0x1,%ebx
  jne    L192
L359:
  mov    %esi,%ebp
  add    $0x1,%ebp
  add    %ebp,%r8d
  sub    $0x2,%edx
  je     L253
L271:
  cmp    $0x1,%edx
  jne    L0
L89:
  mov    %r8d,%ebx
  add    $0x1,%ebx
  add    %ebx,%r9d
  sub    $0x2,%r10d
  je     L236
L299:
  cmp    $0x1,%r10d
  jne    L102
L351:
  mov    %r9d,%ebp
  add    $0x1,%ebp
  add    %ebp,0x8(%rsp)
  sub    $0x2,%r11d
  je     L115
L34:
  cmp    $0x1,%r11d
  jne    L290
L88:
  mov    0x8(%rsp),%ebx
  add    $0x1,%ebx
L345:
  add    %ebx,0x4(%rsp)
  subl   $0x2,0x10(%rsp)
  je     L257
  cmpl   $0x1,0x10(%rsp)
  jne    L2
L70:
  mov    0x4(%rsp),%r11d
  add    $0x1,%r11d
L1:
  add    %r11d,(%rsp)
  subl   $0x2,0xc(%rsp)
  je     L217
  cmpl   $0x1,0xc(%rsp)
  jne    L219
L341:
  mov    (%rsp),%r8d
  add    $0x1,%r8d
L165:
  add    $0x38,%rsp
  mov    %r8d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L352:
  mov    %ecx,%ebx
  add    %r12d,%esi
  sub    $0x2,%ebx
  jne    L149
L120:
  mov    %esi,%ebp
  add    %ebp,%r8d
  sub    $0x2,%edx
  jne    L271
L253:
  mov    %r8d,%ebx
  add    %ebx,%r9d
  sub    $0x2,%r10d
  jne    L299
L236:
  mov    %r9d,%ebp
  add    %ebp,0x8(%rsp)
  sub    $0x2,%r11d
  jne    L34
L115:
  mov    0x8(%rsp),%ebx
  jmp    L345
  nopw   0x0(%rax,%rax,1)
L287:
  mov    %r12d,%r11d
  mov    %r13d,%r10d
  mov    %r14d,%esi
  mov    0x14(%rsp),%r13d
  mov    0x18(%rsp),%r12d
  mov    0x1c(%rsp),%r14d
  add    $0x1,%ebx
  jmp    L197
L153:
  mov    $0xffffffff,%r8d
L109:
  mov    %r8d,%eax
  ret
L257:
  mov    0x4(%rsp),%r11d
  jmp    L1
L217:
  mov    (%rsp),%r8d
  jmp    L165
```

assistant: ```c
int ft_fibonacci(int index) {
  if (index < 0)
    return (-1);
  else if (index == 0)
    return (0);
  else if (index == 1)
    return (1);
  else
    return (ft_fibonacci(index - 1) + ft_fibonacci(index - 2));
}
```