pin_name, cleanup legacy code

src/kyupy/techlib.py

@@ -11,50 +11,6 @@ from itertools import product
 from . import bench
 
 
-class TechLibOld:
-    @staticmethod
-    def pin_index(kind, pin):
-        if isinstance(pin, int):
-            return max(0, pin-1)
-        if kind[:3] in ('OAI', 'AOI'):
-            if pin[0] == 'A': return int(pin[1]) - 1
-            if pin == 'B': return int(kind[3])
-            if pin[0] == 'B': return int(pin[1]) - 1 + int(kind[3])
-        for prefix, pins, index in [('HADD', ('B0', 'SO'), 1),
-                                    ('HADD', ('A0', 'C1'), 0),
-                                    ('MUX21', ('S', 'S0'), 2),
-                                    ('MX2', ('S0',), 2),
-                                    ('TBUF', ('OE',), 1),
-                                    ('TINV', ('OE',), 1),
-                                    ('LATCH', ('D',), 0),
-                                    ('LATCH', ('QN',), 1),
-                                    ('DFF', ('D',), 0),
-                                    ('DFF', ('QN',), 1),
-                                    ('SDFF', ('D',), 0),
-                                    ('SDFF', ('QN',), 1),
-                                    ('SDFF', ('CLK',), 3),
-                                    ('SDFF', ('RSTB', 'RN'), 4),
-                                    ('SDFF', ('SETB',), 5),
-                                    ('ISOL', ('ISO',), 0),
-                                    ('ISOL', ('D',), 1)]:
-            if kind.startswith(prefix) and pin in pins: return index
-        for index, pins in enumerate([('A1', 'IN1', 'A', 'S', 'INP', 'I', 'Q', 'QN', 'Y', 'Z', 'ZN'),
-                                      ('A2', 'IN2', 'B', 'CK', 'CLK', 'CO', 'SE'),
-                                      ('A3', 'IN3', 'C', 'RN', 'RSTB', 'CI', 'SI'),
-                                      ('A4', 'IN4', 'D', 'SN', 'SETB'),
-                                      ('A5', 'IN5', 'E'),
-                                      ('A6', 'IN6', 'F')]):
-            if pin in pins: return index
-        raise ValueError(f'Unknown pin index for {kind}.{pin}')
-
-    @staticmethod
-    def pin_is_output(kind, pin):
-        if isinstance(pin, int):
-            return pin == 0
-        if 'MUX' in kind and pin == 'S': return False
-        return pin in ('Q', 'QN', 'Z', 'ZN', 'Y', 'CO', 'S', 'SO', 'C1')
-
-
 class TechLib:
     """Class for standard cell library definitions.
 
@@ -93,6 +49,14 @@ class TechLib:
         assert pin in self.cells[kind][1], f'Unknown pin: {pin} for cell {kind}'
         return self.cells[kind][1][pin][0]
 
+    def pin_name(self, kind, pos, output=False):
+        """Returns the pin name for a given node kind, list position, and direction."""
+        assert kind in self.cells, f'Unknown cell: {kind}'
+        for name, (ppos, isout) in self.cells[kind][1].items():
+            if isout == output and ppos == pos:
+                return name
+        return None
+
     def pin_is_output(self, kind, pin):
         """Returns True, if given pin name of a node kind is an output."""
         assert kind in self.cells, f'Unknown cell: {kind}'