user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<SDL_imageFilterAbsDiff>:
  endbr64
  push   %r13
  xor    %eax,%eax
  mov    %rdx,%r13
  push   %r12
  mov    %ecx,%r12d
  push   %rbp
  mov    %rsi,%rbp
  push   %rbx
  mov    %rdi,%rbx
  sub    $0x8,%rsp
  call   <SDL_imageFilterMMXdetect@plt>
  test   %rax,%rax
  je     L41
  cmp    $0x7,%r12d
  jg     L229
L41:
  xor    %ecx,%ecx
L40:
  cmp    %r12d,%ecx
  jae    L71
  lea    0x1(%rbp),%rdx
  mov    %r13,%rax
  lea    0x1(%rbx),%rdi
  mov    %r12d,%esi
  sub    %rdx,%rax
  sub    %ecx,%esi
  cmp    $0xe,%rax
  mov    %r13,%rax
  seta   %dl
  sub    %rdi,%rax
  cmp    $0xe,%rax
  seta   %al
  test   %al,%dl
  je     L102
  lea    -0x1(%rsi),%eax
  cmp    $0xe,%eax
  jbe    L102
  mov    %esi,%edx
  movdqa D1(%rip),%xmm6
  xor    %eax,%eax
  pxor   %xmm4,%xmm4
  shr    $0x4,%edx
  pxor   %xmm5,%xmm5
  shl    $0x4,%rdx
  nopl   0x0(%rax)
L87:
  movdqu (%rbx,%rax,1),%xmm1
  movdqu 0x0(%rbp,%rax,1),%xmm2
  movdqa %xmm1,%xmm3
  movdqa %xmm2,%xmm0
  punpckhbw %xmm4,%xmm1
  punpcklbw %xmm4,%xmm0
  punpckhbw %xmm4,%xmm2
  punpcklbw %xmm4,%xmm3
  psubw  %xmm0,%xmm3
  psubw  %xmm2,%xmm1
  movdqa %xmm5,%xmm0
  movdqa %xmm5,%xmm2
  psubw  %xmm3,%xmm0
  psubw  %xmm1,%xmm2
  pmaxsw %xmm3,%xmm0
  pmaxsw %xmm2,%xmm1
  pand   %xmm6,%xmm0
  pand   %xmm6,%xmm1
  packuswb %xmm1,%xmm0
  movups %xmm0,0x0(%r13,%rax,1)
  add    $0x10,%rax
  cmp    %rax,%rdx
  jne    L87
  mov    %esi,%edi
  lea    0x1(%rcx),%eax
  and    $0xfffffff0,%edi
  mov    %edi,%edx
  add    %rdx,%rbx
  add    %rdx,%rbp
  add    %r13,%rdx
  cmp    %edi,%esi
  je     L71
  movzbl (%rbx),%esi
  movzbl 0x0(%rbp),%ecx
  sub    %ecx,%esi
  mov    %esi,%r8d
  neg    %r8d
  cmovns %r8d,%esi
  add    %edi,%eax
  mov    %sil,(%rdx)
  cmp    %eax,%r12d
  jbe    L71
  movzbl 0x1(%rbp),%esi
  movzbl 0x1(%rbx),%ecx
  sub    %esi,%ecx
  mov    %ecx,%esi
  neg    %esi
  cmovns %esi,%ecx
  mov    %cl,0x1(%rdx)
  lea    0x1(%rax),%ecx
  cmp    %r12d,%ecx
  jae    L71
  movzbl 0x2(%rbp),%esi
  movzbl 0x2(%rbx),%ecx
  sub    %esi,%ecx
  mov    %ecx,%esi
  neg    %esi
  cmovns %esi,%ecx
  mov    %cl,0x2(%rdx)
  lea    0x2(%rax),%ecx
  cmp    %ecx,%r12d
  jbe    L71
  movzbl 0x3(%rbp),%esi
  movzbl 0x3(%rbx),%ecx
  sub    %esi,%ecx
  mov    %ecx,%esi
  neg    %esi
  cmovns %esi,%ecx
  mov    %cl,0x3(%rdx)
  lea    0x3(%rax),%ecx
  cmp    %ecx,%r12d
  jbe    L71
  movzbl 0x4(%rbp),%esi
  movzbl 0x4(%rbx),%ecx
  sub    %esi,%ecx
  mov    %ecx,%esi
  neg    %esi
  cmovns %esi,%ecx
  mov    %cl,0x4(%rdx)
  lea    0x4(%rax),%ecx
  cmp    %ecx,%r12d
  jbe    L71
  movzbl 0x5(%rbp),%esi
  movzbl 0x5(%rbx),%ecx
  sub    %esi,%ecx
  mov    %ecx,%esi
  neg    %esi
  cmovns %esi,%ecx
  mov    %cl,0x5(%rdx)
  lea    0x5(%rax),%ecx
  cmp    %ecx,%r12d
  jbe    L71
  movzbl 0x6(%rbp),%esi
  movzbl 0x6(%rbx),%ecx
  sub    %esi,%ecx
  mov    %ecx,%esi
  neg    %esi
  cmovns %esi,%ecx
  mov    %cl,0x6(%rdx)
  lea    0x6(%rax),%ecx
  cmp    %ecx,%r12d
  jbe    L71
  movzbl 0x7(%rbp),%esi
  movzbl 0x7(%rbx),%ecx
  sub    %esi,%ecx
  mov    %ecx,%esi
  neg    %esi
  cmovns %esi,%ecx
  mov    %cl,0x7(%rdx)
  lea    0x7(%rax),%ecx
  cmp    %ecx,%r12d
  jbe    L71
  movzbl 0x8(%rbp),%esi
  movzbl 0x8(%rbx),%ecx
  sub    %esi,%ecx
  mov    %ecx,%esi
  neg    %esi
  cmovns %esi,%ecx
  mov    %cl,0x8(%rdx)
  lea    0x8(%rax),%ecx
  cmp    %ecx,%r12d
  jbe    L71
  movzbl 0x9(%rbp),%esi
  movzbl 0x9(%rbx),%ecx
  sub    %esi,%ecx
  mov    %ecx,%esi
  neg    %esi
  cmovns %esi,%ecx
  mov    %cl,0x9(%rdx)
  lea    0x9(%rax),%ecx
  cmp    %ecx,%r12d
  jbe    L71
  movzbl 0xa(%rbp),%esi
  movzbl 0xa(%rbx),%ecx
  sub    %esi,%ecx
  mov    %ecx,%esi
  neg    %esi
  cmovns %esi,%ecx
  mov    %cl,0xa(%rdx)
  lea    0xa(%rax),%ecx
  cmp    %ecx,%r12d
  jbe    L71
  movzbl 0xb(%rbp),%esi
  movzbl 0xb(%rbx),%ecx
  sub    %esi,%ecx
  mov    %ecx,%esi
  neg    %esi
  cmovns %esi,%ecx
  mov    %cl,0xb(%rdx)
  lea    0xb(%rax),%ecx
  cmp    %ecx,%r12d
  jbe    L71
  movzbl 0xc(%rbp),%esi
  movzbl 0xc(%rbx),%ecx
  sub    %esi,%ecx
  mov    %ecx,%esi
  neg    %esi
  cmovns %esi,%ecx
  mov    %cl,0xc(%rdx)
  lea    0xc(%rax),%ecx
  cmp    %ecx,%r12d
  jbe    L71
  movzbl 0xd(%rbp),%esi
  movzbl 0xd(%rbx),%ecx
  sub    %esi,%ecx
  mov    %ecx,%esi
  neg    %esi
  cmovns %esi,%ecx
  add    $0xd,%eax
  mov    %cl,0xd(%rdx)
  cmp    %eax,%r12d
  jbe    L71
  movzbl 0xe(%rbp),%ecx
  movzbl 0xe(%rbx),%eax
  sub    %ecx,%eax
  mov    %eax,%ecx
  neg    %ecx
  cmovns %ecx,%eax
  mov    %al,0xe(%rdx)
L71:
  add    $0x8,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  nopl   0x0(%rax,%rax,1)
L229:
  mov    %r12d,%ecx
  mov    %r13,%rdx
  mov    %rbp,%rsi
  mov    %rbx,%rdi
  call   <SDL_imageFilterAbsDiffMMX@plt>
  test   $0x7,%r12b
  je     L71
  mov    %r12d,%ecx
  and    $0xfffffff8,%ecx
  mov    %ecx,%eax
  add    %rax,%rbx
  add    %rax,%rbp
  add    %rax,%r13
  jmp    L40
  nopl   (%rax)
L102:
  sub    $0x1,%r12d
  xor    %eax,%eax
  sub    %ecx,%r12d
  nopl   0x0(%rax)
L198:
  movzbl 0x0(%rbp,%rax,1),%ecx
  movzbl (%rbx,%rax,1),%edx
  sub    %ecx,%edx
  mov    %edx,%ecx
  neg    %ecx
  cmovns %ecx,%edx
  mov    %dl,0x0(%r13,%rax,1)
  mov    %rax,%rdx
  add    $0x1,%rax
  cmp    %rdx,%r12
  jne    L198
  add    $0x8,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
```

tool_calls: name: parse_data
arguments: tag: D1
type: byte[16]

tool: {"D1": [0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00]}

assistant: ```c
int SDL_imageFilterAbsDiff(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, int length) {
  unsigned int i, istart;
  unsigned char *cursrc1, *cursrc2, *curdst;
  int result;
  if ((SDL_imageFilterMMXdetect()) && (length > 7)) {
    SDL_imageFilterAbsDiffMMX(Src1, Src2, Dest, length);
    if ((length & 7) > 0) {
      istart = length & 0xfffffff8;
      cursrc1 = &Src1[istart];
      cursrc2 = &Src2[istart];
      curdst = &Dest[istart];
    } else {
      return (0);
    }
  } else {
    istart = 0;
    cursrc1 = Src1;
    cursrc2 = Src2;
    curdst = Dest;
  }
  for (i = istart; i < length; i++) {
    result = abs((int)*cursrc1 - (int)*cursrc2);
    *curdst = (unsigned char)result;
    cursrc1++;
    cursrc2++;
    curdst++;
  }
  return (0);
}
```