user: Demonstrate the C code that generates the assembly output below:

```asm
<fib>:
  endbr64
  mov    %edi,%r10d
  test   %edi,%edi
  je     L257
  cmp    $0x1,%edi
  je     L257
  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)
L201:
  mov    0x8(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L432
  cmp    $0x1,%eax
  je     L515
  lea    -0x1(%rdi),%eax
  xor    %r8d,%r8d
  mov    %eax,0x4(%rsp)
  mov    %r8d,0x14(%rsp)
L282:
  mov    0x4(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L206
  cmp    $0x1,%eax
  je     L1
  lea    -0x1(%rdi),%eax
  xor    %ecx,%ecx
  mov    %eax,0xc(%rsp)
  mov    %ecx,0x18(%rsp)
L503:
  mov    0xc(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L302
  cmp    $0x1,%eax
  je     L267
  xor    %ecx,%ecx
  lea    -0x1(%rdi),%r8d
  mov    %ecx,0x1c(%rsp)
  mov    %r8d,%ecx
L529:
  mov    %ecx,%eax
  add    $0x1,%eax
  je     L266
  cmp    $0x1,%eax
  je     L104
  xor    %esi,%esi
  mov    %ecx,0x20(%rsp)
  lea    -0x1(%rcx),%r9d
  mov    %esi,(%rsp)
  mov    %r9d,%r15d
L198:
  mov    %r15d,%eax
  add    $0x1,%eax
  je     L91
  cmp    $0x1,%eax
  je     L500
  lea    -0x1(%r15),%r12d
  xor    %ecx,%ecx
  mov    %r15d,%esi
L115:
  mov    %r12d,%eax
  add    $0x1,%eax
  je     L224
  cmp    $0x1,%eax
  je     L65
  xor    %ebx,%ebx
  lea    -0x1(%r12),%ebp
  mov    %r12d,%edx
  mov    %ebx,%r12d
L423:
  mov    %ebp,%eax
  add    $0x1,%eax
  je     L133
  cmp    $0x1,%eax
  je     L144
  mov    %ebp,%eax
  lea    -0x1(%rbp),%ebx
  xor    %r14d,%r14d
  mov    %ecx,%ebp
  mov    %eax,%ecx
L510:
  mov    %ebx,%r13d
  add    $0x1,%r13d
  je     L436
  cmp    $0x1,%r13d
  je     L297
  mov    %ebx,0x24(%rsp)
  xor    %r15d,%r15d
  mov    %esi,%ebx
L39:
  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     L401
  cmp    $0x1,%r13d
  jne    L39
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  add    $0x1,%r15d
L388:
  add    %r15d,%r14d
  test   %ebx,%ebx
  je     L522
  cmp    $0x1,%ebx
  jne    L436
L297:
  mov    %ecx,%eax
  add    $0x1,%r14d
  mov    %ebp,%ecx
  mov    %eax,%ebp
  add    %r14d,%r12d
  test   %ebp,%ebp
  je     L31
L24:
  cmp    $0x1,%ebp
  jne    L133
L144:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  add    $0x1,%ebx
L6:
  add    %ebx,%ecx
  test   %r12d,%r12d
  jne    L441
  mov    %esi,%r15d
  mov    %ecx,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%esi
  test   %r15d,%r15d
  jne    L394
L433:
  mov    0x20(%rsp),%ecx
  add    %esi,0x1c(%rsp)
  test   %ecx,%ecx
  je     L223
L411:
  cmp    $0x1,%ecx
  je     L104
L266:
  sub    $0x2,%ecx
  jmp    L529
L133:
  sub    $0x2,%ebp
  jmp    L423
L441:
  cmp    $0x1,%r12d
  jne    L224
L65:
  mov    %ecx,%r14d
  mov    %esi,%r15d
  add    $0x1,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%esi
  test   %r15d,%r15d
  je     L433
L394:
  cmp    $0x1,%r15d
  je     L500
L91:
  sub    $0x2,%r15d
  jmp    L198
L224:
  sub    $0x2,%r12d
  jmp    L115
L522:
  mov    %ecx,%eax
  mov    %ebp,%ecx
  add    %r14d,%r12d
  mov    %eax,%ebp
  test   %ebp,%ebp
  jne    L24
L31:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  jmp    L6
  nopl   (%rax)
L401:
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  jmp    L388
L500:
  mov    (%rsp),%esi
  mov    0x20(%rsp),%ecx
  add    $0x1,%esi
  add    %esi,0x1c(%rsp)
  test   %ecx,%ecx
  jne    L411
L223:
  mov    0x1c(%rsp),%ecx
  add    %ecx,0x18(%rsp)
  mov    0xc(%rsp),%ecx
  test   %ecx,%ecx
  jne    L45
L275:
  mov    0x4(%rsp),%edx
  mov    0x18(%rsp),%ecx
  add    %ecx,0x14(%rsp)
  test   %edx,%edx
  jne    L502
L295:
  mov    0x14(%rsp),%r8d
  jmp    L217
L436:
  sub    $0x2,%ebx
  jmp    L510
L104:
  mov    0x1c(%rsp),%ecx
  add    $0x1,%ecx
  add    %ecx,0x18(%rsp)
  mov    0xc(%rsp),%ecx
  test   %ecx,%ecx
  je     L275
L45:
  cmpl   $0x1,0xc(%rsp)
  je     L267
L302:
  subl   $0x2,0xc(%rsp)
  jmp    L503
L267:
  mov    0x18(%rsp),%ecx
  mov    0x4(%rsp),%edx
  add    $0x1,%ecx
  add    %ecx,0x14(%rsp)
  test   %edx,%edx
  je     L295
L502:
  cmpl   $0x1,0x4(%rsp)
  je     L1
L206:
  subl   $0x2,0x4(%rsp)
  jmp    L282
L1:
  mov    0x14(%rsp),%r8d
  add    $0x1,%r8d
L217:
  mov    0x8(%rsp),%eax
  add    %r8d,0x10(%rsp)
  test   %eax,%eax
  je     L280
  cmpl   $0x1,0x8(%rsp)
  jne    L432
L515:
  mov    0x10(%rsp),%r10d
  add    $0x1,%r10d
L233:
  add    $0x38,%rsp
  mov    %r10d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L432:
  subl   $0x2,0x8(%rsp)
  jmp    L201
L257:
  mov    %r10d,%eax
  ret
L280:
  mov    0x10(%rsp),%r10d
  jmp    L233
```

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