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Add non-preferred directions for channel routes

This commit is contained in:
mrg 2020-06-11 15:03:36 -07:00
parent 8d52794c32
commit e9780ea599
2 changed files with 23 additions and 5 deletions
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17
compiler/base/hierarchy_layout.py
View File

@ -1043,7 +1043,8 @@ class layout():
mid = vector(pin.center().x, trunk_offset.y)
self.add_path(self.vertical_layer, [pin.center(), mid])
self.add_via_center(layers=layer_stack,
offset=mid)
offset=mid,
directions=self.directions)
def add_vertical_trunk_route(self,
pins,
@ -1083,7 +1084,8 @@ class layout():
mid = vector(trunk_offset.x, pin.center().y)
self.add_path(self.horizontal_layer, [pin.center(), mid])
self.add_via_center(layers=layer_stack,
offset=mid)
offset=mid,
directions=self.directions)
def create_channel_route(self, netlist,
offset,
@ -1146,7 +1148,8 @@ class layout():
overlaps = (not vertical and x_overlap) or (vertical and y_overlap)
return overlaps
if not directions:
self.directions = directions
if not directions or directions == "pref":
# Use the preferred layer directions
if self.get_preferred_direction(layer_stack[0]) == "V":
self.vertical_layer = layer_stack[0]
@ -1154,6 +1157,14 @@ class layout():
else:
self.vertical_layer = layer_stack[2]
self.horizontal_layer = layer_stack[0]
elif directions == "nonpref":
# Use the preferred layer directions
if self.get_preferred_direction(layer_stack[0]) == "V":
self.vertical_layer = layer_stack[2]
self.horizontal_layer = layer_stack[0]
else:
self.vertical_layer = layer_stack[0]
self.horizontal_layer = layer_stack[2]
else:
# Use the layer directions specified to the router rather than
# the preferred directions

11
compiler/modules/bank.py
View File

@ -9,7 +9,7 @@ import debug
import design
from sram_factory import factory
from math import log, ceil
from tech import drc
from tech import drc, layer
from vector import vector
from globals import OPTS
@ -879,9 +879,16 @@ class bank(design.design):
column_mux_pins = [self.port_data_inst[port].get_pin(x) for x in sel_names]
route_map = list(zip(decode_pins, column_mux_pins))
if "li" in layer:
stack = self.li_stack
directions = "nonpref"
else:
stack = self.m1_stack
directions = "pref"
self.create_vertical_channel_route(route_map,
offset,
self.m1_stack)
stack,
directions=directions)
def add_lvs_correspondence_points(self):
"""