def graph_from_xml(input_file_name, progressbar=None, filter_nodes=True):
"""
Loads relevant information about the routing resource graph from an XML
file.
"""
if progressbar is None:
progressbar = lambda x: x # noqa: E731
root_attrib = {}
switches = []
segments = []
block_types = []
grid = []
nodes = []
# Itertate over XML elements
switch_timing = None
switch_sizing = None
segment_timing = None
pins = []
pin_classes = []
node_loc = None
node_timing = None
for path, element in progressbar(iterate_xml(input_file_name)):
# Root tag
if path == "" and element.tag == "rr_graph":
root_attrib = dict(element.attrib)
# Switch timing
if path == "rr_graph/switches/switch" and element.tag == "timing":
switch_timing = graph2.SwitchTiming(
r=float(element.attrib['R']),
c_in=float(element.attrib['Cin']),
c_out=float(element.attrib['Cout']),
c_internal=float(element.attrib.get('Cinternal', 0)),
t_del=float(element.attrib['Tdel']),
)
# Switch sizing
if path == "rr_graph/switches/switch" and element.tag == "sizing":
switch_sizing = graph2.SwitchSizing(
mux_trans_size=float(element.attrib['mux_trans_size']),
buf_size=float(element.attrib['buf_size']),
)
# Switch
if path == "rr_graph/switches" and element.tag == "switch":
switches.append(
graph2.Switch(
id=int(element.attrib['id']),
type=enum_from_string(graph2.SwitchType,
element.attrib['type']),
name=element.attrib['name'],
timing=switch_timing,
sizing=switch_sizing,
))
switch_timing = None
switch_sizing = None
# Segment timing
if path == "rr_graph/segments/segment" and element.tag == "timing":
segment_timing = graph2.SegmentTiming(
r_per_meter=float(element.attrib['R_per_meter']),
c_per_meter=float(element.attrib['C_per_meter']),
)
# Segment
if path == "rr_graph/segments" and element.tag == "segment":
segments.append(
graph2.Segment(
id=int(element.attrib['id']),
name=element.attrib['name'],
timing=segment_timing,
))
segment_timing = None
# Block type - pin
if path == "rr_graph/block_types/block_type/pin_class" and element.tag == "pin":
pins.append(
graph2.Pin(
ptc=int(element.attrib['ptc']),
name=element.text,
))
# Block type - pin_class
if path == "rr_graph/block_types/block_type" and element.tag == "pin_class":
pin_classes.append(
graph2.PinClass(
type=enum_from_string(graph2.PinType,
element.attrib['type']),
pin=pins,
))
pins = []
# Block type
if path == "rr_graph/block_types" and element.tag == "block_type":
block_types.append(
graph2.BlockType(
id=int(element.attrib['id']),
name=element.attrib['name'],
width=int(element.attrib['width']),
height=int(element.attrib['height']),
pin_class=pin_classes,
))
pin_classes = []
# Grid
if path == "rr_graph/grid" and element.tag == "grid_loc":
grid.append(
graph2.GridLoc(
x=int(element.attrib['x']),
y=int(element.attrib['y']),
block_type_id=int(element.attrib['block_type_id']),
width_offset=int(element.attrib['width_offset']),
height_offset=int(element.attrib['height_offset']),
))
# Node - loc
if path == "rr_graph/rr_nodes/node" and element.tag == "loc":
if 'side' in element.attrib:
side = enum_from_string(tracks.Direction,
element.attrib['side'])
else:
side = None
node_loc = graph2.NodeLoc(x_low=int(element.attrib['xlow']),
y_low=int(element.attrib['ylow']),
x_high=int(element.attrib['xhigh']),
y_high=int(element.attrib['yhigh']),
ptc=int(element.attrib['ptc']),
side=side)
# Node - timing
if path == "rr_graph/rr_nodes/node" and element.tag == "timing":
node_timing = graph2.NodeTiming(
r=float(element.attrib['R']),
c=float(element.attrib['C']),
)
# Node
if path == "rr_graph/rr_nodes" and element.tag == "node":
node_type = enum_from_string(graph2.NodeType,
element.attrib['type'])
if filter_nodes and node_type not in [
graph2.NodeType.SOURCE, graph2.NodeType.SINK,
graph2.NodeType.OPIN, graph2.NodeType.IPIN
]:
continue
# Dropping metadata for now
metadata = None
nodes.append(
graph2.Node(
id=int(element.attrib['id']),
type=node_type,
direction=graph2.NodeDirection.NO_DIR,
capacity=int(element.attrib['capacity']),
loc=node_loc,
timing=node_timing,
metadata=metadata,
segment=None,
canonical_loc=None,
connection_box=None,
))
node_loc = None
node_timing = None
return dict(root_attrib=root_attrib,
switches=switches,
segments=segments,
block_types=block_types,
grid=grid,
nodes=nodes)
def graph_from_xml(input_xml, progressbar=None):
if progressbar is None:
progressbar = lambda x: x
switches = []
for switch in input_xml.find('switches').iter('switch'):
timing_xml = switch.find('timing')
if timing_xml is not None:
timing = graph2.SwitchTiming(
r=float(timing_xml.attrib['R']),
c_in=float(timing_xml.attrib['Cin']),
c_out=float(timing_xml.attrib['Cout']),
t_del=float(timing_xml.attrib['Tdel']),
)
else:
timing = None
sizing_xml = switch.find('sizing')
if sizing_xml is not None:
sizing = graph2.SwitchSizing(
mux_trans_size=float(sizing_xml.attrib['mux_trans_size']),
buf_size=float(sizing_xml.attrib['buf_size']),
)
else:
sizing = None
switches.append(
graph2.Switch(
id=int(switch.attrib['id']),
type=enum_from_string(graph2.SwitchType,
switch.attrib['type']),
name=switch.attrib['name'],
timing=timing,
sizing=sizing,
))
segments = []
for segment in input_xml.find('segments').iter('segment'):
timing_xml = segment.find('timing')
if timing_xml is not None:
timing = graph2.SegmentTiming(
r_per_meter=float(timing_xml.attrib['R_per_meter']),
c_per_meter=float(timing_xml.attrib['C_per_meter']),
)
else:
timing = None
segments.append(
graph2.Segment(
id=int(segment.attrib['id']),
name=segment.attrib['name'],
timing=timing,
))
block_types = []
for block_type in input_xml.find('block_types').iter('block_type'):
pin_classes = []
for pin_class in block_type.iter('pin_class'):
pins = []
for pin in pin_class.iter('pin'):
pins.append(
graph2.Pin(
ptc=int(pin.attrib['ptc']),
name=pin.text,
))
pin_classes.append(
graph2.PinClass(
type=enum_from_string(graph2.PinType,
pin_class.attrib['type']),
pin=pins,
))
block_types.append(
graph2.BlockType(
id=int(block_type.attrib['id']),
name=block_type.attrib['name'],
width=int(block_type.attrib['width']),
height=int(block_type.attrib['height']),
pin_class=pin_classes,
))
grid = []
for grid_loc in input_xml.find('grid').iter('grid_loc'):
grid.append(
graph2.GridLoc(
x=int(grid_loc.attrib['x']),
y=int(grid_loc.attrib['y']),
block_type_id=int(grid_loc.attrib['block_type_id']),
width_offset=int(grid_loc.attrib['width_offset']),
height_offset=int(grid_loc.attrib['height_offset']),
))
nodes = []
for node in progressbar(input_xml.find('rr_nodes').iter('node')):
node_type = enum_from_string(graph2.NodeType, node.attrib['type'])
if node_type in [
graph2.NodeType.SOURCE, graph2.NodeType.SINK,
graph2.NodeType.OPIN, graph2.NodeType.IPIN
]:
loc_xml = node.find('loc')
if loc_xml is not None:
if 'side' in loc_xml.attrib:
side = enum_from_string(tracks.Direction,
loc_xml.attrib['side'])
else:
side = None
loc = graph2.NodeLoc(x_low=int(loc_xml.attrib['xlow']),
y_low=int(loc_xml.attrib['ylow']),
x_high=int(loc_xml.attrib['xhigh']),
y_high=int(loc_xml.attrib['yhigh']),
ptc=int(loc_xml.attrib['ptc']),
side=side)
else:
loc = None
timing_xml = node.find('timing')
if timing_xml is not None:
timing = graph2.NodeTiming(
r=float(timing_xml.attrib['R']),
c=float(timing_xml.attrib['C']),
)
else:
timing = None
# Not expecting any metadata on the input.
assert node.find('metadata') is None
metadata = None
nodes.append(
graph2.Node(
id=int(node.attrib['id']),
type=node_type,
direction=graph2.NodeDirection.NO_DIR,
capacity=int(node.attrib['capacity']),
loc=loc,
timing=timing,
metadata=metadata,
segment=None,
))
return dict(switches=switches,
segments=segments,
block_types=block_types,
grid=grid,
nodes=nodes)
def read_pin(pin):
return graph2.Pin(
ptc=pin.ptc,
name=str(pin.value),
)