fuzzyEqual handle zero better

util/Fuzzy.cc

@@ -26,19 +26,27 @@ namespace sta {
 using std::max;
 using std::abs;
 
+constexpr static float float_equal_tolerance = 1E-15F;
+
 bool
 fuzzyEqual(float v1,
 	   float v2)
 {
-  return v1 == v2
+  if (v1 == v2)
-    || abs(v1 - v2) < 1E-6F * max(abs(v1), abs(v2));
+    return true;
+  else if (v1 == 0.0)
+    return abs(v2) < float_equal_tolerance;
+  else if (v2 == 0.0)
+    return abs(v1) < float_equal_tolerance;
+  else
+    return abs(v1 - v2) < 1E-6F * max(abs(v1), abs(v2));
 }
 
 bool
 fuzzyZero(float v)
 {
   return v == 0.0
-    || abs(v) < 1E-15F;
+    || abs(v) < float_equal_tolerance;
 }
 
 bool