Added class and test for testing the delay of several bitcells.

compiler/tests/27_worst_case_delay_test.py

@@ -0,0 +1,59 @@
+#!/usr/bin/env python3
+"""
+Run a regression test on various srams
+"""
+
+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 worst_case_timing_sram_test(openram_test):
+
+    def runTest(self):
+        globals.init_openram("config_20_{0}".format(OPTS.tech_name))
+        OPTS.spice_name="ngspice"
+        OPTS.analytical_delay = False
+        OPTS.trim_netlist = False
+
+        # This is a hack to reload the characterizer __init__ with the spice version
+        from importlib import reload
+        import characterizer
+        reload(characterizer)
+        from characterizer import worst_case
+        if not OPTS.spice_exe:
+            debug.error("Could not find {} simulator.".format(OPTS.spice_name),-1)
+
+        from sram import sram
+        from sram_config import sram_config
+        c = sram_config(word_size=4,
+                        num_words=32,
+                        num_banks=1)
+        c.words_per_row=1
+        debug.info(1, "Testing the timing for 2 bits inside a 2bit, 16words SRAM with 1 bank")
+        s = sram(c, name="sram1")
+
+        tempspice = OPTS.openram_temp + "temp.sp"
+        s.sp_write(tempspice)
+
+
+        corner = (OPTS.process_corners[0], OPTS.supply_voltages[0], OPTS.temperatures[0])
+        wc = worst_case(s.s, tempspice, corner)
+        import tech
+        loads = [tech.spice["msflop_in_cap"]*4]
+        slews = [tech.spice["rise_time"]*2]
+        probe_address = "1" * s.s.addr_size
+        probe_data = s.s.word_size - 1
+        wc.analyze(probe_address, probe_data, slews, loads)
+
+        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()