Allow special case to test for 0 value on a given monitor

(Required for ALLOW_BACKPROP unnittest)

Author: willend

tools/Python/mctest/mctest.py

@@ -376,7 +376,10 @@ def mccode_test(branchdir, testdir, limitinstrs=None, instrfilter=None, compfilt
         if test.didrun and not failed:
             formatstr = "%-" + "%ds: " % (maxnamelen+1) + \
                 "{:3d}.".format(math.floor(test.runtime)) + str(test.runtime-int(test.runtime)).split('.')[1][:2]
-            logging.info(formatstr % test.get_display_name() + "    [val: " + str(test.testval) + " / " + str(test.targetval) + " = " + str(round(100.0*test.testval/test.targetval)) + " %]")
+            if test.targetval!=0: # Normal situation, non-zero target value
+                logging.info(formatstr % test.get_display_name() + "    [val: " + str(test.testval) + " / " + str(test.targetval) + " = " + str(round(100.0*test.testval/test.targetval)) + " %]")
+            else:                 # Special case, expected test target value is 0
+                logging.info(formatstr % test.get_display_name() + "    [val: " + str(test.testval) + " vs " + str(test.targetval) + " (absolute vs 0) ]")
 
         # save test result to disk
         test.testcomplete = True

tools/Python/mctest/mcviewtest.py

@@ -85,7 +85,7 @@ def get_cell_tuple(cellobj, refval=None):
                 # if this is a second test of the same instr, it was already compiled, thus 0.001 compiletime is nonsense
                 compiletime = ""
             return (state, compiletime, "", "", "", burl)
-        elif not cellobj["testval"]:
+        elif cellobj["testval"]==None:
             testval = "missing"
             runtime = "%.2f s" % cellobj["runtime"]
             compiletime = "%.2f s" % cellobj["compiletime"]
@@ -102,8 +102,15 @@ def get_cell_tuple(cellobj, refval=None):
 
             # Always use embedded target value
             refval = float(cellobj["targetval"])
-
-            refp = abs(float(cellobj["testval"])/refval*100)
+            testval = float(cellobj["testval"])
+            # Special case, target test value is 0 explicitly:
+            if refval==0:
+                if testval==0:
+                    refp=100
+                else:
+                    refp=0
+            else: # Standard case, target test value is non-zero
+                refp = abs(testval/refval*100)
             if abs(refp-100) > ERROR_PERCENT_THRESSHOLD_ACCEPT:
                 state = 2
             else: