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

```asm
<in_chksum_ip>:
  endbr64
  movzwl 0x2(%rdi),%edx
  mov    %esi,%eax
  movzwl (%rdi),%esi
  mov    %rdi,%rcx
  add    %esi,%edx
  movzwl 0x4(%rdi),%esi
  add    %edx,%esi
  movzwl 0x6(%rdi),%edx
  add    %esi,%edx
  movzwl 0x8(%rdi),%esi
  add    %edx,%esi
  movzwl 0xa(%rdi),%edx
  add    %esi,%edx
  movzwl 0xc(%rdi),%esi
  add    %edx,%esi
  movzwl 0xe(%rdi),%edx
  add    %esi,%edx
  movzwl 0x10(%rdi),%esi
  add    %edx,%esi
  movzwl 0x12(%rdi),%edx
  add    %esi,%edx
  lea    0x14(%rdi),%rsi
  mov    %eax,%edi
  sub    $0x14,%edi
  je     L59
  sub    $0x18,%eax
  mov    %eax,%r8d
  shr    $0x2,%r8d
  add    $0x1,%r8d
  cmp    $0x18,%eax
  jbe    L23
  mov    %r8d,%r9d
  pxor   %xmm5,%xmm5
  pxor   %xmm2,%xmm2
  mov    %rsi,%rax
  shr    $0x3,%r9d
  sub    $0x1,%r9d
  shl    $0x5,%r9
  lea    0x34(%rcx,%r9,1),%rcx
  nopw   0x0(%rax,%rax,1)
L37:
  movdqu (%rax),%xmm0
  movdqu 0x10(%rax),%xmm4
  add    $0x20,%rax
  movdqa %xmm0,%xmm1
  movdqa %xmm0,%xmm3
  punpcklwd %xmm4,%xmm0
  punpcklwd %xmm4,%xmm1
  punpckhwd %xmm4,%xmm3
  movdqa %xmm1,%xmm6
  punpcklwd %xmm3,%xmm1
  punpcklwd %xmm3,%xmm0
  punpckhwd %xmm3,%xmm6
  punpcklwd %xmm6,%xmm1
  punpckhwd %xmm6,%xmm0
  movdqa %xmm1,%xmm3
  punpckhwd %xmm2,%xmm1
  punpcklwd %xmm2,%xmm3
  paddd  %xmm3,%xmm1
  movdqa %xmm0,%xmm3
  punpckhwd %xmm2,%xmm0
  punpcklwd %xmm2,%xmm3
  paddd  %xmm3,%xmm0
  paddd  %xmm0,%xmm1
  paddd  %xmm1,%xmm5
  cmp    %rcx,%rax
  jne    L37
  movdqa %xmm5,%xmm0
  psrldq $0x8,%xmm0
  paddd  %xmm0,%xmm5
  movdqa %xmm5,%xmm0
  psrldq $0x4,%xmm0
  paddd  %xmm0,%xmm5
  movd   %xmm5,%eax
  add    %eax,%edx
  mov    %r8d,%eax
  and    $0xfffffff8,%eax
  mov    %eax,%ecx
  lea    (%rsi,%rcx,4),%rsi
  mov    %eax,%ecx
  neg    %ecx
  lea    (%rdi,%rcx,4),%edi
  cmp    %r8d,%eax
  je     L59
L23:
  movzwl (%rsi),%eax
  movzwl 0x2(%rsi),%ecx
  add    %ecx,%eax
  add    %eax,%edx
  cmp    $0x4,%edi
  je     L59
  movzwl 0x4(%rsi),%eax
  movzwl 0x6(%rsi),%ecx
  add    %ecx,%eax
  add    %eax,%edx
  cmp    $0x8,%edi
  je     L59
  movzwl 0x8(%rsi),%eax
  movzwl 0xa(%rsi),%ecx
  add    %ecx,%eax
  add    %eax,%edx
  cmp    $0xc,%edi
  je     L59
  movzwl 0xc(%rsi),%eax
  movzwl 0xe(%rsi),%ecx
  add    %ecx,%eax
  add    %eax,%edx
  cmp    $0x10,%edi
  je     L59
  movzwl 0x10(%rsi),%eax
  movzwl 0x12(%rsi),%ecx
  add    %ecx,%eax
  add    %eax,%edx
  cmp    $0x14,%edi
  je     L59
  movzwl 0x14(%rsi),%eax
  movzwl 0x16(%rsi),%ecx
  add    %ecx,%eax
  add    %eax,%edx
  cmp    $0x18,%edi
  je     L59
  movzwl 0x1a(%rsi),%eax
  movzwl 0x18(%rsi),%ecx
  add    %ecx,%eax
  add    %eax,%edx
L59:
  mov    %edx,%eax
  movzwl %dx,%edx
  shr    $0x10,%eax
  add    %eax,%edx
  mov    %edx,%eax
  shr    $0x10,%eax
  add    %edx,%eax
  not    %eax
  ret
```

assistant: ```c
unsigned short in_chksum_ip(unsigned short *w, int blen) {
  unsigned int cksum;
  cksum = w[0];
  cksum += w[1];
  cksum += w[2];
  cksum += w[3];
  cksum += w[4];
  cksum += w[5];
  cksum += w[6];
  cksum += w[7];
  cksum += w[8];
  cksum += w[9];
  blen -= 20;
  w += 10;
  while (blen) {
    cksum += w[0];
    cksum += w[1];
    w += 2;
    blen -= 4;
  }
  cksum = (cksum >> 16) + (cksum & 0x0000ffff);
  cksum += (cksum >> 16);
  return (unsigned short)(~cksum);
}
```