user: What would the C source look like for the assembly code provided here?

```asm
<IPChecksum>:
  endbr64
  not    %edi
  mov    %rsi,%rcx
  mov    %edx,%r8d
  movzwl %di,%eax
  lea    -0x1(%rdx),%edi
  test   %edi,%edi
  jle    L208
  lea    -0x2(%rdx),%edx
  mov    %edx,%esi
  shr    %esi
  add    $0x1,%esi
  cmp    $0x1d,%edx
  jbe    L38
  mov    %esi,%r9d
  pxor   %xmm6,%xmm6
  pxor   %xmm4,%xmm4
  mov    %rcx,%rdx
  shr    $0x4,%r9d
  movdqa D2(%rip),%xmm5
  pxor   %xmm3,%xmm3
  sub    $0x1,%r9d
  shl    $0x5,%r9
  lea    0x20(%rcx,%r9,1),%r9
  nopl   0x0(%rax,%rax,1)
L79:
  movdqu (%rdx),%xmm0
  movdqu 0x10(%rdx),%xmm1
  add    $0x20,%rdx
  movdqu -0x10(%rdx),%xmm2
  pand   %xmm5,%xmm1
  pand   %xmm5,%xmm0
  packuswb %xmm1,%xmm0
  movdqu -0x20(%rdx),%xmm1
  psrlw  $0x8,%xmm2
  psrlw  $0x8,%xmm1
  packuswb %xmm2,%xmm1
  movdqa %xmm0,%xmm2
  punpckhbw %xmm4,%xmm0
  movdqa %xmm1,%xmm7
  punpcklbw %xmm4,%xmm2
  punpckhbw %xmm4,%xmm1
  psllw  $0x8,%xmm2
  psllw  $0x8,%xmm0
  punpcklbw %xmm4,%xmm7
  por    %xmm7,%xmm2
  por    %xmm1,%xmm0
  movdqa %xmm2,%xmm1
  punpckhwd %xmm3,%xmm2
  punpcklwd %xmm3,%xmm1
  paddd  %xmm6,%xmm1
  paddd  %xmm2,%xmm1
  movdqa %xmm0,%xmm2
  punpckhwd %xmm3,%xmm0
  punpcklwd %xmm3,%xmm2
  paddd  %xmm2,%xmm1
  movdqa %xmm1,%xmm6
  paddd  %xmm0,%xmm6
  cmp    %r9,%rdx
  jne    L79
  movdqa %xmm6,%xmm0
  mov    %esi,%r9d
  psrldq $0x8,%xmm0
  and    $0xfffffff0,%r9d
  paddd  %xmm0,%xmm6
  movdqa %xmm6,%xmm0
  psrldq $0x4,%xmm0
  paddd  %xmm0,%xmm6
  movd   %xmm6,%edx
  add    %edx,%eax
  lea    (%r9,%r9,1),%edx
  cmp    %r9d,%esi
  je     L51
L202:
  movslq %edx,%r10
  movzbl (%rcx,%r10,1),%r9d
  movzbl 0x1(%rcx,%r10,1),%r10d
  shl    $0x8,%r9d
  or     %r10d,%r9d
  add    %r9d,%eax
  lea    0x2(%rdx),%r9d
  cmp    %edi,%r9d
  jge    L51
  movslq %r9d,%r9
  movzbl 0x1(%rcx,%r9,1),%r10d
  movzbl (%rcx,%r9,1),%r9d
  shl    $0x8,%r9d
  or     %r10d,%r9d
  add    %r9d,%eax
  lea    0x4(%rdx),%r9d
  cmp    %r9d,%edi
  jle    L51
  movslq %r9d,%r9
  movzbl (%rcx,%r9,1),%r10d
  movzbl 0x1(%rcx,%r9,1),%r9d
  shl    $0x8,%r10d
  or     %r10d,%r9d
  add    %r9d,%eax
  lea    0x6(%rdx),%r9d
  cmp    %r9d,%edi
  jle    L51
  movslq %r9d,%r9
  movzbl (%rcx,%r9,1),%r10d
  movzbl 0x1(%rcx,%r9,1),%r9d
  shl    $0x8,%r10d
  or     %r10d,%r9d
  add    %r9d,%eax
  lea    0x8(%rdx),%r9d
  cmp    %r9d,%edi
  jle    L51
  movslq %r9d,%r9
  movzbl (%rcx,%r9,1),%r10d
  movzbl 0x1(%rcx,%r9,1),%r9d
  shl    $0x8,%r10d
  or     %r10d,%r9d
  add    %r9d,%eax
  lea    0xa(%rdx),%r9d
  cmp    %r9d,%edi
  jle    L51
  movslq %r9d,%r9
  movzbl (%rcx,%r9,1),%r10d
  movzbl 0x1(%rcx,%r9,1),%r9d
  shl    $0x8,%r10d
  or     %r10d,%r9d
  add    %r9d,%eax
  lea    0xc(%rdx),%r9d
  cmp    %r9d,%edi
  jle    L51
  movslq %r9d,%r9
  movzbl (%rcx,%r9,1),%r10d
  movzbl 0x1(%rcx,%r9,1),%r9d
  shl    $0x8,%r10d
  or     %r10d,%r9d
  add    %r9d,%eax
  lea    0xe(%rdx),%r9d
  cmp    %r9d,%edi
  jle    L51
  movslq %r9d,%r9
  movzbl (%rcx,%r9,1),%r10d
  movzbl 0x1(%rcx,%r9,1),%r9d
  shl    $0x8,%r10d
  or     %r10d,%r9d
  add    %r9d,%eax
  lea    0x10(%rdx),%r9d
  cmp    %r9d,%edi
  jle    L51
  movslq %r9d,%r9
  movzbl (%rcx,%r9,1),%r10d
  movzbl 0x1(%rcx,%r9,1),%r9d
  shl    $0x8,%r10d
  or     %r10d,%r9d
  add    %r9d,%eax
  lea    0x12(%rdx),%r9d
  cmp    %r9d,%edi
  jle    L51
  movslq %r9d,%r9
  movzbl (%rcx,%r9,1),%r10d
  movzbl 0x1(%rcx,%r9,1),%r9d
  shl    $0x8,%r10d
  or     %r10d,%r9d
  add    %r9d,%eax
  lea    0x14(%rdx),%r9d
  cmp    %r9d,%edi
  jle    L51
  movslq %r9d,%r9
  movzbl (%rcx,%r9,1),%r10d
  movzbl 0x1(%rcx,%r9,1),%r9d
  shl    $0x8,%r10d
  or     %r10d,%r9d
  add    %r9d,%eax
  lea    0x16(%rdx),%r9d
  cmp    %r9d,%edi
  jle    L51
  movslq %r9d,%r9
  movzbl (%rcx,%r9,1),%r10d
  movzbl 0x1(%rcx,%r9,1),%r9d
  shl    $0x8,%r10d
  or     %r10d,%r9d
  add    %r9d,%eax
  lea    0x18(%rdx),%r9d
  cmp    %r9d,%edi
  jle    L51
  movslq %r9d,%r9
  movzbl (%rcx,%r9,1),%r10d
  movzbl 0x1(%rcx,%r9,1),%r9d
  shl    $0x8,%r10d
  or     %r10d,%r9d
  add    %r9d,%eax
  lea    0x1a(%rdx),%r9d
  cmp    %r9d,%edi
  jle    L51
  movslq %r9d,%r9
  add    $0x1c,%edx
  movzbl (%rcx,%r9,1),%r10d
  movzbl 0x1(%rcx,%r9,1),%r9d
  shl    $0x8,%r10d
  or     %r10d,%r9d
  add    %r9d,%eax
  cmp    %edx,%edi
  jle    L51
  movslq %edx,%rdx
  movzbl 0x1(%rcx,%rdx,1),%edi
  movzbl (%rcx,%rdx,1),%edx
  shl    $0x8,%edx
  or     %edi,%edx
  add    %edx,%eax
  nopl   0x0(%rax,%rax,1)
L51:
  add    %esi,%esi
  cmp    %esi,%r8d
  jle    L48
  movslq %esi,%rsi
  add    %rsi,%rcx
L34:
  movzbl (%rcx),%edx
  shl    $0x8,%edx
  add    %edx,%eax
L48:
  mov    %eax,%edx
  sar    $0x10,%edx
  je     L59
  nopl   0x0(%rax)
L104:
  movzwl %ax,%eax
  add    %edx,%eax
  mov    %eax,%edx
  sar    $0x10,%edx
  jne    L104
L59:
  xor    $0xffff,%eax
  ret
  nopw   0x0(%rax,%rax,1)
L208:
  test   %edx,%edx
  jg     L34
  jmp    L59
L38:
  xor    %edx,%edx
  jmp    L202
```

tool_calls: name: parse_data
arguments: label: D2
type_infered: byte[16]

tool: {"D2": [0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00]}

assistant: ```c
int IPChecksum(int checksum, const unsigned char *data, int length) {
  int i;
  checksum = ~checksum & 0xffff;
  for (i = 0; i < length - 1; i += 2) {
    checksum += (data[i] << 8) | data[i + 1];
  }
  if (i < length)
    checksum += data[i] << 8;
  while (checksum >> 16)
    checksum = (checksum & 0xffff) + (checksum >> 16);
  checksum = ~checksum & 0xffff;
  return checksum;
}
```