ALU

alu (int x, int y, int *flags, int op)
{
int result = 0;
  switch (op)
  {
    CASE ADDL:
      result = x+y;
      result = (unsigned)x + (unsigned)y;
      if (result < x)
      {
        flags |= 0x1;
      }
      if (result == 0)
      {
        flags |= 0x2;
      }
      //something about signed numbers
  }
}