user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<merge>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r13
  push   %r12
  sub    $0x50,%rsp
  mov    %rdi,-0x48(%rbp)
  mov    %esi,-0x4c(%rbp)
  mov    %edx,-0x50(%rbp)
  mov    %ecx,-0x54(%rbp)
  mov    %r8d,-0x58(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x18(%rbp)
  xor    %eax,%eax
  mov    %rsp,%rax
  mov    %rax,%rsi
  movl   $0x0,-0x34(%rbp)
  mov    -0x4c(%rbp),%eax
  mov    %eax,-0x3c(%rbp)
  mov    -0x54(%rbp),%eax
  mov    %eax,-0x38(%rbp)
  mov    -0x50(%rbp),%eax
  sub    -0x4c(%rbp),%eax
  add    $0x1,%eax
  mov    %eax,-0x30(%rbp)
  mov    -0x58(%rbp),%eax
  sub    -0x54(%rbp),%eax
  add    $0x1,%eax
  mov    %eax,-0x2c(%rbp)
  mov    -0x30(%rbp),%edx
  mov    -0x2c(%rbp),%eax
  add    %edx,%eax
  movslq %eax,%rdx
  sub    $0x1,%rdx
  mov    %rdx,-0x28(%rbp)
  movslq %eax,%rdx
  mov    %rdx,%r12
  mov    $0x0,%r13d
  movslq %eax,%rdx
  mov    %rdx,%r10
  mov    $0x0,%r11d
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    $0x10,%eax
  sub    $0x1,%rax
  add    %rdx,%rax
  mov    $0x10,%edi
  mov    $0x0,%edx
  div    %rdi
  imul   $0x10,%rax,%rax
  mov    %rax,%rcx
  and    $0xfffffffffffff000,%rcx
  mov    %rsp,%rdx
  sub    %rcx,%rdx
L97:
  cmp    %rdx,%rsp
  je     L30
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L97
L30:
  mov    %rax,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  mov    %rax,%rdx
  and    $0xfff,%edx
  test   %rdx,%rdx
  je     L133
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L133:
  mov    %rsp,%rax
  add    $0x3,%rax
  shr    $0x2,%rax
  shl    $0x2,%rax
  mov    %rax,-0x20(%rbp)
  jmp    L66
L100:
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%edx
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x48(%rbp),%rax
  add    %rcx,%rax
  mov    (%rax),%eax
  cmp    %eax,%edx
  jge    L135
  mov    -0x3c(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x3c(%rbp)
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x34(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x34(%rbp)
  mov    (%rcx),%ecx
  mov    -0x20(%rbp),%rdx
  cltq
  mov    %ecx,(%rdx,%rax,4)
  jmp    L66
L135:
  mov    -0x38(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x38(%rbp)
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x34(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x34(%rbp)
  mov    (%rcx),%ecx
  mov    -0x20(%rbp),%rdx
  cltq
  mov    %ecx,(%rdx,%rax,4)
L66:
  mov    -0x3c(%rbp),%eax
  cmp    -0x50(%rbp),%eax
  jg     L39
  mov    -0x38(%rbp),%eax
  cmp    -0x58(%rbp),%eax
  jle    L100
  jmp    L39
L27:
  mov    -0x3c(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x3c(%rbp)
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x34(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x34(%rbp)
  mov    (%rcx),%ecx
  mov    -0x20(%rbp),%rdx
  cltq
  mov    %ecx,(%rdx,%rax,4)
L39:
  mov    -0x3c(%rbp),%eax
  cmp    -0x50(%rbp),%eax
  jle    L27
  jmp    L8
L26:
  mov    -0x38(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x38(%rbp)
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x34(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x34(%rbp)
  mov    (%rcx),%ecx
  mov    -0x20(%rbp),%rdx
  cltq
  mov    %ecx,(%rdx,%rax,4)
L8:
  mov    -0x38(%rbp),%eax
  cmp    -0x58(%rbp),%eax
  jle    L26
  mov    -0x4c(%rbp),%eax
  mov    %eax,-0x3c(%rbp)
  jmp    L102
L31:
  mov    -0x3c(%rbp),%eax
  sub    -0x4c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x48(%rbp),%rax
  add    %rax,%rcx
  mov    -0x20(%rbp),%rax
  movslq %edx,%rdx
  mov    (%rax,%rdx,4),%eax
  mov    %eax,(%rcx)
  addl   $0x1,-0x3c(%rbp)
L102:
  mov    -0x3c(%rbp),%eax
  cmp    -0x58(%rbp),%eax
  jle    L31
  mov    %rsi,%rsp
  nop
  mov    -0x18(%rbp),%rax
  sub    %fs:0x28,%rax
  je     L60
  call   <__stack_chk_fail@plt>
L60:
  lea    -0x10(%rbp),%rsp
  pop    %r12
  pop    %r13
  pop    %rbp
  ret
```

assistant: ```c
void merge(int arr[], int l1, int r1, int l2, int r2) {
  int i, j, k = 0;
  i = l1;
  j = l2;
  int len1, len2;
  len1 = r1 - l1 + 1;
  len2 = r2 - l2 + 1;
  int b[len1 + len2];
  while (i <= r1 && j <= r2) {
    if (arr[i] < arr[j]) {
      b[k++] = arr[i++];
    } else {
      b[k++] = arr[j++];
    }
  }
  while (i <= r1) {
    b[k++] = arr[i++];
  }
  while (j <= r2) {
    b[k++] = arr[j++];
  }
  for (i = l1; i <= r2; i++) {
    arr[i] = b[i - l1];
  }
}
```