Many edits.

Use internal vdd/gnd names.
Refactor getters in bitcell to base class.
Add BIAS signal type.

compiler/modules/bitcell_base_array.py

@@ -35,11 +35,6 @@ class bitcell_base_array(design.design):
         self.rbl_wordline_names = [[] for port in self.all_ports]
         self.all_rbl_wordline_names = []
 
-        # The supply pin names
-        self.bitcell_supplies = self.cell.supplies
-        # If the technology needs renaming of the supplies
-        self.supplies = ["vdd", "gnd"]
-
     def create_all_bitline_names(self):
         for col in range(self.column_size):
             for port in self.all_ports:
@@ -63,8 +58,8 @@ class bitcell_base_array(design.design):
             self.add_pin(bl_name, "INOUT")
         for wl_name in self.get_wordline_names():
             self.add_pin(wl_name, "INPUT")
-        self.add_pin(self.supplies[0], "POWER")
-        self.add_pin(self.supplies[1], "GROUND")
+        self.add_pin("vdd", "POWER")
+        self.add_pin("gnd", "GROUND")
 
     def get_bitcell_pins(self, row, col):
         """
@@ -75,8 +70,8 @@ class bitcell_base_array(design.design):
         for port in self.all_ports:
             bitcell_pins.extend([x for x in self.get_bitline_names(port) if x.endswith("_{0}".format(col))])
         bitcell_pins.extend([x for x in self.all_wordline_names if x.endswith("_{0}".format(row))])
-        bitcell_pins.append(self.bitcell_supplies[0])
-        bitcell_pins.append(self.bitcell_supplies[1])
+        bitcell_pins.append("vdd")
+        bitcell_pins.append("gnd")
 
         return bitcell_pins
 
@@ -166,8 +161,8 @@ class bitcell_base_array(design.design):
         for row in range(self.row_size):
             for col in range(self.column_size):
                 inst = self.cell_inst[row, col]
-                for (pin_name, new_name) in zip(self.bitcell_supplies, self.supplies):
-                    self.copy_layout_pin(inst, pin_name, new_name)
+                for pin_name in ["vdd", "gnd"]:
+                    self.copy_layout_pin(inst, pin_name)
 
     def _adjust_x_offset(self, xoffset, col, col_offset):
         tempx = xoffset