// find fragments jumped to by this fragment
// applies Branch and Call code tags, and adjusts fragments to include SPB return address
static void Connect(Fragment frag)
{
Int32 addr = frag.Start;
Int32 limit = frag.Start + frag.Length;
while (addr < limit)
{
UInt16 word = CORE[addr];
if (!CTagIs(addr++, CTag.Valid))
{
continue; // skip over operands
}
Int32 op = (word >> 12) & 15;
if (op == 0) // augmented 00 instructions
{
op = word & 63;
if (op == 30) // LOB
{
Int32 target = CORE[addr++];
CTAG[target] |= CTag.Branch;
Fragment tf = FindFragment(target);
if (tf == null)
{
continue;
}
if (tf != frag)
{
Connect(frag, tf);
}
}
}
else if (op == 9) // BRU
{
Int32 target = MemOpAddr(addr - 1, word);
CTAG[target] |= CTag.Branch;
Fragment tf = FindFragment(target);
if (tf == null)
{
continue;
}
if (tf != frag)
{
Connect(frag, tf);
}
}
else if (op == 10) // SPB
{
Int32 target = MemOpAddr(addr - 1, word);
CTAG[target] |= CTag.Call;
Fragment tf = FindFragment(target + 1);
if (tf == null)
{
continue;
}
if (tf != frag)
{
Connect(frag, tf);
}
if (FindFragment(target) == null)
{
tf.AdjustStart(-1);
}
}
}
}