user: 这段汇编代码用C语言表示是什么样的？

```asm
<merge_sort_helper>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbx
  sub    $0x28,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  xor    %eax,%eax
  cmp    %edx,%esi
  jl     L106
L95:
  mov    -0x38(%rbp),%rax
  sub    %fs:0x28,%rax
  jne    L171
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
L106:
  mov    %rdi,%r12
  mov    %esi,%r13d
  mov    %edx,%r14d
  mov    %rsp,-0x50(%rbp)
  mov    %edx,%eax
  sub    %esi,%eax
  mov    %eax,%r15d
  shr    $0x1f,%r15d
  mov    %eax,-0x44(%rbp)
  add    %eax,%r15d
  sar    %r15d
  add    %esi,%r15d
  mov    %r15d,%edx
  call   <merge_sort_helper>
  lea    0x1(%r15),%ebx
  mov    %r14d,%edx
  mov    %ebx,%esi
  mov    %r12,%rdi
  call   <merge_sort_helper>
  mov    -0x44(%rbp),%eax
  add    $0x1,%eax
  cltq
  lea    0xf(,%rax,4),%rax
  mov    %rax,%rcx
  and    $0xfffffffffffffff0,%rcx
  and    $0xfffffffffffff000,%rax
  mov    %rsp,%rdx
  sub    %rax,%rdx
L128:
  cmp    %rdx,%rsp
  je     L73
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L128
L73:
  mov    %rcx,%rax
  and    $0xfff,%eax
  sub    %rax,%rsp
  test   %rax,%rax
  je     L74
  orq    $0x0,-0x8(%rsp,%rax,1)
L74:
  mov    %rsp,%rsi
  cmp    %r15d,%r13d
  jg     L138
  cmp    %r14d,%ebx
  jg     L138
  mov    %rsi,%rcx
  mov    $0x1,%edx
  jmp    L52
L107:
  add    $0x1,%ebx
  mov    %edx,%r8d
  mov    %edi,%eax
L13:
  mov    %eax,(%rcx)
  add    $0x1,%edx
  add    $0x4,%rcx
  cmp    %r15d,%r13d
  jg     L58
  cmp    %r14d,%ebx
  jg     L58
L52:
  movslq %r13d,%rax
  mov    (%r12,%rax,4),%eax
  movslq %ebx,%rdi
  mov    (%r12,%rdi,4),%edi
  cmp    %edi,%eax
  jge    L107
  add    $0x1,%r13d
  mov    %edx,%r8d
  jmp    L13
L138:
  mov    $0x0,%r8d
L58:
  cmp    %r13d,%r15d
  jl     L123
  movslq %r13d,%rax
  movslq %r8d,%rdx
  sub    %rax,%rdx
  lea    (%rsi,%rdx,4),%rcx
L136:
  mov    (%r12,%rax,4),%edx
  mov    %edx,(%rcx,%rax,4)
  add    $0x1,%rax
  cmp    %eax,%r15d
  jge    L136
  lea    0x1(%r8,%r15,1),%r8d
  sub    %r13d,%r8d
L123:
  cmp    %ebx,%r14d
  jl     L173
  movslq %ebx,%rbx
  movslq %r8d,%r8
  sub    %rbx,%r8
  lea    (%rsi,%r8,4),%rdx
L92:
  mov    (%r12,%rbx,4),%eax
  mov    %eax,(%rdx,%rbx,4)
  add    $0x1,%rbx
  cmp    %ebx,%r14d
  jge    L92
L173:
  movslq -0x44(%rbp),%rax
  movslq %r14d,%r14
  sub    %rax,%r14
  lea    (%r12,%r14,4),%rcx
L115:
  mov    (%rsi,%rax,4),%edx
  mov    %edx,(%rcx,%rax,4)
  sub    $0x1,%rax
  test   %eax,%eax
  jns    L115
  mov    -0x50(%rbp),%rsp
  jmp    L95
L171:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
void merge_sort_helper(int *arr, int left, int right) {
  int mid;
  if (left < right) {
    mid = left + (right - left) / 2;
    merge_sort_helper(arr, left, mid);
    merge_sort_helper(arr, mid + 1, right);
    int temp[right - left + 1], i = left, j = mid + 1, k = 0, m;
    while ((i <= mid) && (j <= right)) {
      if (arr[i] < arr[j]) {
        temp[k] = arr[i];
        i++;
        k++;
      } else {
        temp[k] = arr[j];
        j++;
        k++;
      }
    }
    while (i <= mid) {
      temp[k] = arr[i];
      k++;
      i++;
    }
    while (j <= right) {
      temp[k] = arr[j];
      k++;
      j++;
    }
    for (m = right - left; m >= 0; m--) {
      arr[right] = temp[m];
      right--;
    }
  }
}
```