def get_pip_class(wire_from, wire_to):
if "FCO" in wire_from or "FCI" in wire_to:
return pip_class_to_idx["zero"]
if "F5" in wire_from or "FX" in wire_from or "FXA" in wire_to or "FXB" in wire_to:
return pip_class_to_idx["zero"]
class_name = pip_classes.get_pip_class(wire_from, wire_to)
if class_name is None or class_name not in pip_class_to_idx:
class_name = "default"
return pip_class_to_idx[class_name]
def get_equations(ncl):
signals, bels = extract_ncl_routing.parse_ncl(ncl)
wire_fanout = {} # wire, pipclass -> fanout
path_pip_classes = {} # (src, dest) -> [(wire, pipclass)]
for name, sig in sorted(signals.items()):
nd = extract_ncl_routing.net_to_dict(sig, bels)
drivers, loads, route = sig
if len(drivers) != 1:
continue
if nd is None:
continue
drv = drivers[0]
for load in loads:
path = []
if load not in nd:
continue
wire = nd[load]
skip = False
while wire != drv:
path.append(wire)
if wire not in nd:
skip = True
break
wire = nd[wire]
if skip:
continue
path.reverse()
path_pip_classes[drv, load] = []
for i in range(len(path) - 1):
pip_src = path[i]
pip_dst = path[i + 1]
pip_class = pip_classes.get_pip_class(pip_src, pip_dst)
if pip_class is None:
skip = True
break
path_pip_classes[drv, load].append((pip_src, pip_class))
wire_fanout[pip_src, pip_class] = wire_fanout.get(
(pip_src, pip_class), 0) + 1
if skip:
del path_pip_classes[drv, load]
continue
return path_pip_classes, wire_fanout
def get_pip_class(wire_from, wire_to):
class_name = pip_classes.get_pip_class(wire_from, wire_to)
if class_name is None or class_name not in pip_class_to_idx:
class_name = "default"
return pip_class_to_idx[class_name]