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Fix missing via LVS issues. LVS passing for some 20 tests.

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This commit is contained in:
mrg
2020-07-01 09:22:59 -07:00
parent b07f30cb9e
commit 3d0f29ff3a
4 changed files with 53 additions and 33 deletions
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compiler/modules/delay_chain.py
+15 -14
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@@ -140,21 +140,20 @@ class delay_chain(design.design):
for load in self.load_inst_map[inv]:
# Drop a via on each A pin
a_pin = load.get_pin("A")
self.add_via_center(layers=self.m1_stack,
offset=a_pin.center())
self.add_via_center(layers=self.m2_stack,
offset=a_pin.center())
self.add_via_stack_center(from_layer=a_pin.layer,
to_layer="m3",
offset=a_pin.center())
# Route an M3 horizontal wire to the furthest
z_pin = inv.get_pin("Z")
a_pin = inv.get_pin("A")
a_max = self.load_inst_map[inv][-1].get_pin("A")
self.add_via_center(layers=self.m1_stack,
offset=a_pin.center())
self.add_via_center(layers=self.m1_stack,
offset=z_pin.center())
self.add_via_center(layers=self.m2_stack,
offset=z_pin.center())
self.add_via_stack_center(from_layer=a_pin.layer,
to_layer="m2",
offset=a_pin.center())
self.add_via_stack_center(from_layer=z_pin.layer,
to_layer="m3",
offset=z_pin.center())
self.add_path("m3", [z_pin.center(), a_max.center()])
# Route Z to the A of the next stage
@@ -191,8 +190,9 @@ class delay_chain(design.design):
# input is A pin of first inverter
a_pin = self.driver_inst_list[0].get_pin("A")
self.add_via_center(layers=self.m1_stack,
offset=a_pin.center())
self.add_via_stack_center(from_layer=a_pin.layer,
to_layer="m2",
offset=a_pin.center())
self.add_layout_pin(text="in",
layer="m2",
offset=a_pin.ll().scale(1, 0),
@@ -201,8 +201,9 @@ class delay_chain(design.design):
# output is A pin of last load inverter
last_driver_inst = self.driver_inst_list[-1]
a_pin = self.load_inst_map[last_driver_inst][-1].get_pin("A")
self.add_via_center(layers=self.m1_stack,
offset=a_pin.center())
self.add_via_stack_center(from_layer=a_pin.layer,
to_layer="m2",
offset=a_pin.center())
mid_point = vector(a_pin.cx() + 3 * self.m2_width, a_pin.cy())
self.add_path("m2", [a_pin.center(), mid_point, mid_point.scale(1, 0)])
self.add_layout_pin_segment_center(text="out",