Generalize active and poly stacks

compiler/bitcells/pbitcell.py

@@ -1019,7 +1019,7 @@ class pbitcell(bitcell_base.bitcell_base):
         # add well contacts
         # connect pimplants to gnd
         offset = vector(0, self.gnd_position.y)
-        self.add_via_center(layers=("active", "contact", "metal1"),
+        self.add_via_center(layers=self.active_stack,
                             offset=offset,
                             directions=("H", "H"),
                             implant_type="p",
@@ -1027,7 +1027,7 @@ class pbitcell(bitcell_base.bitcell_base):
 
         # connect nimplants to vdd
         offset = vector(0, self.vdd_position.y)
-        self.add_via_center(layers=("active", "contact", "metal1"),
+        self.add_via_center(layers=self.active_stack,
                             offset=offset,
                             directions=("H", "H"),
                             implant_type="n",

compiler/pgates/pgate.py

@@ -168,7 +168,7 @@ class pgate(design.design):
     def add_nwell_contact(self, pmos, pmos_pos):
         """ Add an nwell contact next to the given pmos device. """
         
-        layer_stack = ("active", "contact", "metal1")
+        layer_stack = self.active_stack
         
         # To the right a spacing away from the pmos right active edge
         contact_xoffset = pmos_pos.x + pmos.active_width \
@@ -221,7 +221,7 @@ class pgate(design.design):
     def add_pwell_contact(self, nmos, nmos_pos):
         """ Add an pwell contact next to the given nmos device. """
 
-        layer_stack = ("active", "contact", "metal1")
+        layer_stack = self.active_stack
 
         pwell_position = vector(0, -0.5 * self.m1_width)
         

compiler/pgates/precharge.py

@@ -177,7 +177,7 @@ class precharge(design.design):
         well_contact_pos = self.upper_pmos1_inst.get_pin("D").center().scale(1, 0) \
                            + vector(0, self.upper_pmos1_inst.uy() + contact.well.height / 2 \
                                     + drc("well_extend_active"))
-        self.add_via_center(layers=("active", "contact", "metal1"),
+        self.add_via_center(layers=self.active_stack,
                             offset=well_contact_pos,
                             implant_type="n",
                             well_type="n")

compiler/pgates/ptristate_inv.py

@@ -191,7 +191,7 @@ class ptristate_inv(pgate.pgate):
         supplies AFTER the wells are created
         """
 
-        layer_stack = ("active", "contact", "metal1")
+        layer_stack = self.active_stack
 
         drain_pos = self.nmos1_inst.get_pin("S").center()
         vdd_pos = self.get_pin("vdd").center()

compiler/pgates/ptx.py

@@ -124,7 +124,7 @@ class ptx(design.design):
             
         # This is not actually instantiated but used for calculations
         self.active_contact = factory.create(module_type="contact",
-                                             layer_stack=("active", "contact", "metal1"),
+                                             layer_stack=self.active_stack,
                                              dimensions=(1, self.num_contacts))
 
         
@@ -373,7 +373,7 @@ class ptx(design.design):
         [source_positions,drain_positions] = self.get_contact_positions()
 
         for pos in source_positions:
-            contact=self.add_via_center(layers=("active", "contact", "metal1"),
+            contact=self.add_via_center(layers=self.active_stack,
                                         offset=pos,
                                         size=(1, self.num_contacts),
                                         directions=("H","V"),
@@ -387,7 +387,7 @@ class ptx(design.design):
 
                 
         for pos in drain_positions:
-            contact=self.add_via_center(layers=("active", "contact", "metal1"),
+            contact=self.add_via_center(layers=self.active_stack,
                                         offset=pos,
                                         size=(1, self.num_contacts),
                                         directions=("H","V"),

compiler/pgates/single_level_column_mux.py

@@ -175,7 +175,7 @@ class single_level_column_mux(pgate.pgate):
         # Add it to the right, aligned in between the two tx
         active_pos = vector(self.bitcell.width,
                             self.nmos_upper.by() - 0.5 * self.poly_space)
-        self.add_via_center(layers=("active", "contact", "metal1"),
+        self.add_via_center(layers=self.active_stack,
                             offset=active_pos,
                             implant_type="p",
                             well_type="p")