Testing to ensure branch is up to date with dev. Added 04_pbuf_test.py and made changes to pbuf.py to align with comments.

compiler/pgates/pbuf.py

@@ -31,18 +31,18 @@ class pbuf(design.design):
         
         # Shield the cap, but have at least a stage effort of 4
         input_size = max(1,int(driver_size/stage_effort))
-        self.inv = pinv(size=input_size, height=height) # 1 
+        self.inv1 = pinv(size=input_size, height=height) # 1 
         self.add_mod(self.inv)
         
-        self.inv1 = pinv(size=driver_size, height=height) # 2
+        self.inv2 = pinv(size=driver_size, height=height) # 2
         self.add_mod(self.inv1)
 
-        self.width = 2*self.inv1.width + self.inv2.width
-        self.height = 2*self.inv1.height
+        self.width = self.inv1.width + self.inv2.width
+        self.height = self.inv1.height
 
         self.create_layout()
 
-        self.offset_all_coordinates()
+        #self.offset_all_coordinates()
         
         self.DRC_LVS()
 
@@ -61,14 +61,14 @@ class pbuf(design.design):
     def add_insts(self):
         # Add INV1 to the right 
         self.inv1_inst=self.add_inst(name="buf_inv1",
-                                     mod=self.inv,
+                                     mod=self.inv1,
                                      offset=vector(0,0))
         self.connect_inst(["A", "zb_int",  "vdd", "gnd"])
         
 
         # Add INV2 to the right
         self.inv2_inst=self.add_inst(name="buf_inv2",
-                                     mod=self.inv1,
+                                     mod=self.inv2,
                                      offset=vector(self.inv1_inst.rx(),0))
         self.connect_inst(["zb_int", "Z",  "vdd", "gnd"])
         
@@ -106,7 +106,7 @@ class pbuf(design.design):
                             width=self.width,
                             height=vdd_pin.height())
             
-        z_pin = self.inv4_inst.get_pin("Z")
+        z_pin = self.inv2_inst.get_pin("Z")
         self.add_layout_pin_rect_center(text="Z",
                                         layer="metal2",
                                         offset=z_pin.center())

compiler/tests/04_pbuf_test.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python3
+"""
+Run a regression test on a 2-row buffer cell
+"""
+
+import unittest
+from testutils import header,openram_test
+import sys,os
+sys.path.append(os.path.join(sys.path[0],".."))
+import globals
+from globals import OPTS
+import debug
+
+class pinvbuf_test(openram_test):
+
+    def runTest(self):
+        globals.init_openram("config_20_{0}".format(OPTS.tech_name))
+        global verify
+        import verify
+
+        import pinv
+
+        debug.info(2, "Testing inverter/buffer 4x 8x")
+        a = pbuf.pbuf(8)
+        self.local_check(a)
+
+        globals.end_openram()
+
+# instantiate a copdsay of the class to actually run the test
+if __name__ == "__main__":
+    (OPTS, args) = globals.parse_args()
+    del sys.argv[1:]
+    header(__file__, OPTS.tech_name)
+    unittest.main()