user: 请将以下的汇编代码转换成C语言代码:

```asm
<checksum>:
  endbr64
  mov    %rdi,%rdx
  cmp    $0x1,%esi
  jle    L93
  lea    -0x2(%rsi),%r10d
  mov    %r10d,%r9d
  shr    %r9d
  lea    0x1(%r9),%edi
  cmp    $0x1d,%r10d
  jbe    L133
  mov    %edi,%ecx
  movdqa D5(%rip),%xmm4
  mov    %rdx,%rax
  pxor   %xmm2,%xmm2
  shr    $0x4,%ecx
  sub    $0x1,%ecx
  shl    $0x6,%rcx
  lea    0x40(%rdx,%rcx,1),%rcx
  nopl   0x0(%rax,%rax,1)
L79:
  movdqu 0x10(%rax),%xmm6
  movdqu (%rax),%xmm0
  add    $0x40,%rax
  movdqa %xmm0,%xmm1
  punpcklwd %xmm6,%xmm0
  punpckhwd %xmm6,%xmm1
  movdqa %xmm0,%xmm3
  movdqu -0x10(%rax),%xmm6
  punpckhwd %xmm1,%xmm3
  punpcklwd %xmm1,%xmm0
  movdqu -0x20(%rax),%xmm1
  punpcklwd %xmm3,%xmm0
  movdqa %xmm1,%xmm3
  punpcklwd %xmm6,%xmm1
  pand   %xmm4,%xmm0
  punpckhwd %xmm6,%xmm3
  movdqa %xmm1,%xmm5
  punpckhwd %xmm3,%xmm5
  punpcklwd %xmm3,%xmm1
  punpcklwd %xmm5,%xmm1
  pand   %xmm4,%xmm1
  packuswb %xmm1,%xmm0
  paddb  %xmm0,%xmm2
  cmp    %rcx,%rax
  jne    L79
  movdqa %xmm2,%xmm0
  mov    %edi,%r8d
  psrldq $0x8,%xmm0
  and    $0xfffffff0,%r8d
  paddb  %xmm0,%xmm2
  mov    %r8d,%r11d
  pxor   %xmm0,%xmm0
  mov    %r8d,%ecx
  psadbw %xmm0,%xmm2
  neg    %r11d
  lea    (%rdx,%rcx,4),%rcx
  movd   %xmm2,%eax
  lea    (%rsi,%r11,2),%esi
  cmp    %r8d,%edi
  je     L139
L9:
  lea    -0x2(%rsi),%r8d
  add    (%rcx),%al
  cmp    $0x1,%r8d
  jle    L139
  lea    -0x4(%rsi),%r8d
  add    0x4(%rcx),%al
  cmp    $0x1,%r8d
  jle    L139
  lea    -0x6(%rsi),%r8d
  add    0x8(%rcx),%al
  cmp    $0x1,%r8d
  jle    L139
  lea    -0x8(%rsi),%r8d
  add    0xc(%rcx),%al
  cmp    $0x1,%r8d
  jle    L139
  lea    -0xa(%rsi),%r8d
  add    0x10(%rcx),%al
  cmp    $0x1,%r8d
  jle    L139
  lea    -0xc(%rsi),%r8d
  add    0x14(%rcx),%al
  cmp    $0x1,%r8d
  jle    L139
  lea    -0xe(%rsi),%r8d
  add    0x18(%rcx),%al
  cmp    $0x1,%r8d
  jle    L139
  lea    -0x10(%rsi),%r8d
  add    0x1c(%rcx),%al
  cmp    $0x1,%r8d
  jle    L139
  lea    -0x12(%rsi),%r8d
  add    0x20(%rcx),%al
  cmp    $0x1,%r8d
  jle    L139
  lea    -0x14(%rsi),%r8d
  add    0x24(%rcx),%al
  cmp    $0x1,%r8d
  jle    L139
  lea    -0x16(%rsi),%r8d
  add    0x28(%rcx),%al
  cmp    $0x1,%r8d
  jle    L139
  lea    -0x18(%rsi),%r8d
  add    0x2c(%rcx),%al
  cmp    $0x1,%r8d
  jle    L139
  lea    -0x1a(%rsi),%r8d
  add    0x30(%rcx),%al
  cmp    $0x1,%r8d
  jle    L139
  add    0x34(%rcx),%al
  cmp    $0x1d,%esi
  jle    L139
  add    0x38(%rcx),%al
  nopl   0x0(%rax)
L139:
  mov    %r9d,%ecx
  lea    (%rdx,%rdi,4),%rdx
  neg    %ecx
  lea    (%r10,%rcx,2),%esi
L63:
  cmp    $0x1,%esi
  jne    L168
  add    (%rdx),%al
L168:
  movzbl %al,%eax
  not    %eax
  ret
  nopw   0x0(%rax,%rax,1)
L93:
  xor    %eax,%eax
  jmp    L63
L133:
  mov    %rdx,%rcx
  xor    %eax,%eax
  jmp    L9
```

tool_calls: name: unpack_data
arguments: data_label: D5
type_guessed: byte[16]

tool: {"D5": [0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00]}

assistant: ```c
uint16_t checksum(uint16_t *data, int length) {
  uint64_t sum = 0;
  while (length > 1) {
    sum += *data++;
    length -= 2;
  }
  if (length > 0) {
    sum += *(unsigned char *)data;
  }
  while (sum >> 16) {
    sum = (sum & 0xffff) + (sum >> 16);
  }
  return (uint16_t)~sum;
}
```