Move precharge and column mux cells to pgate directory.

Move gnd to M3 in column mux.
Create column mux cell unit test.

compiler/tests/04_single_level_column_mux_test.py

@@ -0,0 +1,39 @@
+#!/usr/bin/env python2.7
+"""
+Run a regresion test on a wordline_driver array
+"""
+
+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
+
+#@unittest.skip("SKIPPING 04_driver_test")
+
+class single_level_column_mux_test(openram_test):
+
+    def runTest(self):
+        globals.init_openram("config_20_{0}".format(OPTS.tech_name))
+        global verify
+        import verify
+        OPTS.check_lvsdrc = False
+
+        import single_level_column_mux
+        import tech
+
+        debug.info(2, "Checking column mux")
+        tx = single_level_column_mux.single_level_column_mux(tx_size=8)
+        self.local_check(tx)
+
+        OPTS.check_lvsdrc = True
+        globals.end_openram()
+        
+# instantiate a copy 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()