memcmp

NTSTATUS __stdcall memcmp(const VOID *buf1, const VOID *buf2, UINT64 count){
  signed __int64 v3; 
  bool v4; 
  UINT64 v6; 
  unsigned __int64 v7; 
  UINT64 v8; 

  v3 = (_BYTE *)buf2 - (_BYTE *)buf1;
  if( count < 8 )
    goto LABEL_6;
  for( ; ((unsigned __int8)buf1 & 7) != 0; --count )
  {
    v4 = *(_BYTE *)buf1 < *((_BYTE *)buf1 + v3);
    if( *(_BYTE *)buf1 != *((_BYTE *)buf1 + v3) )
      return -v4 - (v4 - 1);
    buf1 = (char *)buf1 + 1;
  }
  if( !(count >> 3) )
  {
LABEL_6:
    if( !count )
      return 0;
    while( 1 )
    {
      v4 = *(_BYTE *)buf1 < *((_BYTE *)buf1 + v3);
      if( *(_BYTE *)buf1 != *((_BYTE *)buf1 + v3) )
        break;
      buf1 = (char *)buf1 + 1;
      if( !--count )
        return 0;
    }
    return -v4 - (v4 - 1);
  }
  v6 = count >> 5;
  if( count >> 5 )
  {
    while( 1 )
    {
      v7 = *(_QWORD *)buf1;
      if( *(_QWORD *)buf1 != *(_QWORD *)((char *)buf1 + v3) )
        break;
      v7 = *((_QWORD *)buf1 + 1);
      if( v7 != *(_QWORD *)((char *)buf1 + v3 + 8) )
        goto LABEL_24;
      v7 = *((_QWORD *)buf1 + 2);
      if( v7 != *(_QWORD *)((char *)buf1 + v3 + 16) )
        goto LABEL_23;
      v7 = *((_QWORD *)buf1 + 3);
      if( v7 != *(_QWORD *)((char *)buf1 + v3 + 24) )
      {
        buf1 = (char *)buf1 + 8;
LABEL_23:
        buf1 = (char *)buf1 + 8;
LABEL_24:
        buf1 = (char *)buf1 + 8;
        break;
      }
      buf1 = (char *)buf1 + 32;
      if( !--v6 )
      {
        count &= 0x1Fu;
        goto LABEL_18;
      }
    }
  }
  else
  {
LABEL_18:
    v8 = count >> 3;
    if( !(count >> 3) )
      goto LABEL_6;
    while( 1 )
    {
      v7 = *(_QWORD *)buf1;
      if( *(_QWORD *)buf1 != *(_QWORD *)((char *)buf1 + v3) )
        break;
      buf1 = (char *)buf1 + 8;
      if( !--v8 )
      {
        count &= 7u;
        goto LABEL_6;
      }
    }
  }
  v4 = _byteswap_uint64(v7) < _byteswap_uint64(*(_QWORD *)((char *)buf1 + v3));
  return -v4 - (v4 - 1);
}

Referenced by: