user: 这段汇编代码用C语言表示是什么样的：

```asm
<merge>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  mov    %rdi,%r15
  push   %r14
  mov    %rcx,%r14
  push   %r13
  sub    %rdx,%r14
  push   %r12
  mov    %rdx,%r12
  push   %rbx
  mov    %rsi,%rbx
  sub    $0x28,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  mov    %rdx,%rax
  sub    %rsi,%rax
  mov    %rsp,%rsi
  lea    0x1(%rax),%rcx
  lea    0x17(,%rax,8),%rax
  mov    %rax,%rdx
  and    $0xfffffffffffff000,%rax
  sub    %rax,%rsi
  and    $0xfffffffffffffff0,%rdx
  cmp    %rsi,%rsp
  je     L113
L157:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rsi,%rsp
  jne    L157
L113:
  and    $0xfff,%edx
  sub    %rdx,%rsp
  test   %rdx,%rdx
  jne    L23
L13:
  lea    0x0(,%r14,8),%r13
  mov    %rsp,%rsi
  mov    %rsp,%r9
  lea    0xf(%r13),%rax
  mov    %rax,%rdx
  and    $0xfffffffffffff000,%rax
  sub    %rax,%rsi
  and    $0xfffffffffffffff0,%rdx
  cmp    %rsi,%rsp
  je     L102
L182:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rsi,%rsp
  jne    L182
L102:
  and    $0xfff,%edx
  sub    %rdx,%rsp
  test   %rdx,%rdx
  jne    L70
L164:
  mov    %rsp,%r8
  test   %rcx,%rcx
  jle    L74
  lea    0x0(,%rcx,8),%rdx
  mov    %r9,%rdi
  lea    (%r15,%rbx,8),%rsi
  mov    %r8,-0x50(%rbp)
  mov    %rcx,-0x48(%rbp)
  call   <memcpy@plt>
  test   %r14,%r14
  mov    -0x48(%rbp),%rcx
  mov    -0x50(%rbp),%r8
  mov    %rax,%r9
  jle    L26
  lea    0x8(%r15,%r12,8),%rsi
  mov    %r13,%rdx
  mov    %r8,%rdi
  mov    %rcx,-0x50(%rbp)
  mov    %rax,-0x48(%rbp)
  xor    %r13d,%r13d
  xor    %r12d,%r12d
  call   <memcpy@plt>
  mov    -0x48(%rbp),%r9
  mov    -0x50(%rbp),%rcx
  mov    %rax,%r8
  jmp    L197
  nopw   0x0(%rax,%rax,1)
L112:
  add    $0x1,%r12
  mov    %rax,(%r15,%rbx,8)
  add    $0x1,%rbx
  cmp    %rcx,%r12
  jge    L177
L148:
  cmp    %r14,%r13
  jge    L177
L197:
  mov    (%r9,%r12,8),%rax
  mov    (%r8,%r13,8),%rdx
  cmp    %rdx,%rax
  jle    L112
  mov    %rdx,%rax
  add    $0x1,%r13
  mov    %rax,(%r15,%rbx,8)
  add    $0x1,%rbx
  cmp    %rcx,%r12
  jl     L148
L177:
  cmp    %r12,%rcx
  jle    L174
  mov    %rcx,%rdx
  lea    (%r15,%rbx,8),%rdi
  lea    (%r9,%r12,8),%rsi
  mov    %r8,-0x50(%rbp)
  sub    %r12,%rdx
  mov    %rcx,-0x48(%rbp)
  shl    $0x3,%rdx
  call   <memcpy@plt>
  mov    -0x48(%rbp),%rcx
  mov    -0x50(%rbp),%r8
  add    %rbx,%rcx
  sub    %r12,%rcx
  mov    %rcx,%rbx
L174:
  cmp    %r13,%r14
  jle    L2
L118:
  sub    %r13,%r14
  lea    (%r15,%rbx,8),%rdi
  lea    (%r8,%r13,8),%rsi
  lea    0x0(,%r14,8),%rdx
  call   <memcpy@plt>
L2:
  mov    -0x38(%rbp),%rax
  sub    %fs:0x28,%rax
  jne    L119
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
  nopw   0x0(%rax,%rax,1)
L23:
  orq    $0x0,-0x8(%rsp,%rdx,1)
  jmp    L13
L74:
  test   %r14,%r14
  jle    L26
  mov    %r13,%rdx
  mov    %r8,%rdi
  lea    0x8(%r15,%r12,8),%rsi
  xor    %r13d,%r13d
  call   <memcpy@plt>
  mov    %rax,%r8
  jmp    L118
  nopl   0x0(%rax,%rax,1)
L26:
  xor    %r13d,%r13d
  xor    %r12d,%r12d
  jmp    L177
L70:
  orq    $0x0,-0x8(%rsp,%rdx,1)
  jmp    L164
L119:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
void merge(long long int arr[], long long int l, long long int m, long long int r) {
  long long int i, j, k;
  long long int n1 = m - l + 1;
  long long int n2 = r - m;
  long long int L[n1], R[n2];
  for (i = 0; i < n1; ++i)
    L[i] = arr[l + i];
  for (j = 0; j < n2; ++j)
    R[j] = arr[m + 1 + j];
  i = 0;
  j = 0;
  k = l;
  while (i < n1 && j < n2) {
    if (L[i] <= R[j]) {
      arr[k] = L[i];
      i++;
    } else {
      arr[k] = R[j];
      j++;
    }
    k++;
  }
  while (i < n1) {
    arr[k] = L[i];
    i++;
    k++;
  }
  while (j < n2) {
    arr[k] = R[j];
    j++;
    k++;
  }
}
```