From 9d8c4bd79960ee1592feb01c2f735607eff220b6 Mon Sep 17 00:00:00 2001
From: Jock Tanner <tanner.of.kha@gmail.com>
Date: Wed, 18 Mar 2020 08:46:45 +0000
Subject: [PATCH] Parameterize bit width.

---
 experiments7/doAlu16.py | 41 ++++++++++++++++++++++-------------------
 1 file changed, 22 insertions(+), 19 deletions(-)

diff --git a/experiments7/doAlu16.py b/experiments7/doAlu16.py
index 749343c..032f216 100755
--- a/experiments7/doAlu16.py
+++ b/experiments7/doAlu16.py
@@ -20,6 +20,7 @@ from plugins import RSavePlugin
 import symbolic.cmos  # do not remove
 
 af = CRL.AllianceFramework.get()
+BIT_WIDTH = 16
 
 
 def get_layer(name, layer_cache={}):
@@ -135,7 +136,7 @@ def add(**kwargs):
     UpdateSession.open()
     cell.setAbutmentBox(ab)
 
-    for i in range(16):
+    for i in range(BIT_WIDTH):
         x = 20.0 * i + 10.0
         y = height
         pin = Pin.create(
@@ -152,7 +153,7 @@ def add(**kwargs):
         pin.getNet().setExternal(True)
         NetExternalComponents.setExternal(pin)
 
-    for i in range(16):
+    for i in range(BIT_WIDTH):
         pin = Pin.create(
             cell.getNet('o(%d)' % i),
             'o(%d).0' % i,
@@ -167,7 +168,7 @@ def add(**kwargs):
         pin.getNet().setExternal(True)
         NetExternalComponents.setExternal(pin)
 
-    for i in range(16):
+    for i in range(BIT_WIDTH):
         net = cell.getNet('b(%d)' % i)
         x = 20.0 * i + 10.0 + 10
         y = height - 0
@@ -247,7 +248,7 @@ def sub(**kwargs):
     UpdateSession.open()
     cell.setAbutmentBox(ab)
 
-    for i in range(16):
+    for i in range(BIT_WIDTH):
         x = 20.0 * i + 10.0
         y = height
         pin = Pin.create(
@@ -264,7 +265,7 @@ def sub(**kwargs):
         pin.getNet().setExternal(True)
         NetExternalComponents.setExternal(pin)
 
-    for i in range(16):
+    for i in range(BIT_WIDTH):
         pin = Pin.create(
             cell.getNet('o(%d)' % i),
             'o(%d).0' % i,
@@ -279,7 +280,7 @@ def sub(**kwargs):
         pin.getNet().setExternal(True)
         NetExternalComponents.setExternal(pin)
 
-    for i in range(16):
+    for i in range(BIT_WIDTH):
         net = cell.getNet('b(%d)' % i)
         x = 20.0 * i + 10.0 + 10
         y = height - 0
@@ -335,25 +336,30 @@ def alu16(**kwargs):
     UpdateSession.open()
     cell.setAbutmentBox(ab)
 
-    ins = cell.getInstance('subckt_48_add')
-    ins.setTransformation(
+    # get instances inside cell
+    instances = cell.getInstances()
+
+    # find adder instance
+    add_inst = [x for x in instances if x.getName().endswith('add')][0]
+    add_inst.setTransformation(
         Transformation(
             toDbU(25.0), toDbU(75.0), Transformation.Orientation.ID
         )
     )
-    ins.setPlacementStatus(Instance.PlacementStatus.FIXED)
+    add_inst.setPlacementStatus(Instance.PlacementStatus.FIXED)
 
-    ins = cell.getInstance('subckt_49_sub')
-    ins.setTransformation(
+    # find subtractor instance
+    sub_inst = [x for x in instances if x.getName().endswith('sub')][0]
+    sub_inst.setTransformation(
         Transformation(
             toDbU(725.0), toDbU(75.0), Transformation.Orientation.ID
         )
     )
-    ins.setPlacementStatus(Instance.PlacementStatus.FIXED)
+    sub_inst.setPlacementStatus(Instance.PlacementStatus.FIXED)
 
     yNorth = cell.getAbutmentBox().getYMax()
 
-    for i in range(16):
+    for i in range(BIT_WIDTH):
         Pin.create(
             cell.getNet('a(%d)' % i),
             'a(%d).0' % i,
@@ -410,19 +416,16 @@ def alu16(**kwargs):
     # this puts all the remaining cells (little ones)
     # into this (small) space so that they do not go
     # "all over the place" around the add and sub
-    ab2 = Box( l( 400.0 )
-            , l(   50.0 )
-            , l( 700.0 )
-            , l( 500.0 ) )
+    ab2 = Box(l(400.0), l(50.0), l(700.0), l(500.0))
 
-    cell.setAbutmentBox( ab2 )
+    cell.setAbutmentBox(ab2)
     etesian = Etesian.EtesianEngine.create(cell)
     etesian.place()
 
     # then route (globally)
     # this connects up not just in the remaining (little) cells,
     # it connects *to add and sub and the outside world as well*
-    cell.setAbutmentBox( ab )
+    cell.setAbutmentBox(ab)
 
     result = placeAndRoute(cell)
 
-- 
2.30.2