char *__fastcall sub_350(char *dst, char *src, unsigned __int64 count)
{
  char *dst_2; // rax
  unsigned __int64 count_1; // rcx
  char *dst_1; // rdi
  char *src_1; // rsi

  dst_2 = dst; /*0x360*/
  if ( src < dst && &src[count - 1] >= dst ) /*0x368*/
  {
    src_1 = &src[count - 1]; /*0x380*/
    dst_1 = &dst[count - 1]; /*0x383*/
  }
  else
  {
    count_1 = count; /*0x36a*/
    count &= 7u; /*0x36d*/
    count_1 >>= 3; /*0x374*/
    qmemcpy(dst, src, 8 * count_1); /*0x378*/
    src_1 = &src[8 * count_1]; /*0x378*/
    dst_1 = &dst[8 * count_1]; /*0x378*/
  }
  qmemcpy(dst_1, src_1, count); /*0x38c*/
  return dst_2; /*0x38f*/
}