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Minor tweaks ahead of memory virtualization 

Limit memory sizes to whatever fits in unsigned; crash if
the conversion from unsigned long to unsigned overflows,
instead of just wrapping.  I don't know what happens on
a 32-bit machine if you ask for an 8 Gig memory, but with
a 64-bit machine and this patch, it crashes with an assert.

Set direction on PartSelect Links before connecting them.

May or may not be considered orthogonal to upcoming
memory virtualization patches.
This commit is contained in:
Larry Doolittle 2009-03-05 16:31:48 -08:00 committed by Stephen Williams
parent 944495b94e
commit d21cd18e3f
1 changed files with 13 additions and 8 deletions
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21
netlist.cc
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@ -524,10 +524,14 @@ NetNet::NetNet(NetScope*s, perm_string n, Type t,
static unsigned calculate_count(long s, long e)
{
if (s >= e)
return s - e + 1;
else
return e - s + 1;
unsigned long r;
if (s >= e) {
r = s - e + 1;
} else {
r = e - s + 1;
}
assert (r <= UINT_MAX);
return r;
}
NetNet::NetNet(NetScope*s, perm_string n, Type t,
@ -810,7 +814,6 @@ NetPartSelect::NetPartSelect(NetNet*sig, unsigned off, unsigned wid,
: NetNode(sig->scope(), sig->scope()->local_symbol(), 2),
off_(off), wid_(wid), dir_(dir__)
{
connect(pin(1), sig->pin(0));
set_line(*sig);
switch (dir_) {
@ -823,6 +826,8 @@ NetPartSelect::NetPartSelect(NetNet*sig, unsigned off, unsigned wid,
pin(1).set_dir(Link::OUTPUT);
break;
}
connect(pin(1), sig->pin(0));
}
NetPartSelect::NetPartSelect(NetNet*sig, NetNet*sel,
@ -830,9 +835,6 @@ NetPartSelect::NetPartSelect(NetNet*sig, NetNet*sel,
: NetNode(sig->scope(), sig->scope()->local_symbol(), 3),
off_(0), wid_(wid), dir_(VP)
{
connect(pin(1), sig->pin(0));
connect(pin(2), sel->pin(0));
switch (dir_) {
case NetPartSelect::VP:
pin(0).set_dir(Link::OUTPUT);
@ -844,6 +846,9 @@ NetPartSelect::NetPartSelect(NetNet*sig, NetNet*sel,
break;
}
pin(2).set_dir(Link::INPUT);
connect(pin(1), sig->pin(0));
connect(pin(2), sel->pin(0));
}
NetPartSelect::~NetPartSelect()