diff --git a/src/simulator/high-precision.cc b/src/simulator/high-precision.cc
index 3a62391d7..f2a5cba81 100644
--- a/src/simulator/high-precision.cc
+++ b/src/simulator/high-precision.cc
@@ -159,4 +159,38 @@ HighPrecision::Zero (void)
 
 #endif /* HIGH_PRECISION_I128 */
 
+HighPrecision Abs (HighPrecision const &value)
+{
+  if (value.Compare (HighPrecision::Zero ()) <= 0)
+    {
+      return HighPrecision::Zero ().Sub (value);
+    }
+  else
+    {
+      return value;
+    }
+}
+HighPrecision Max (HighPrecision const &a, HighPrecision const &b)
+{
+  if (a.Compare (b) >= 0)
+    {
+      return a;
+    }
+  else
+    {
+      return b;
+    }
+}
+HighPrecision Min (HighPrecision const &a, HighPrecision const &b)
+{
+  if (a.Compare (b) <= 0)
+    {
+      return a;
+    }
+  else
+    {
+      return b;
+    }
+}
+
 }; /* namespace ns3 */
diff --git a/src/simulator/high-precision.h b/src/simulator/high-precision.h
index 2a4b5788a..54d9a2938 100644
--- a/src/simulator/high-precision.h
+++ b/src/simulator/high-precision.h
@@ -54,7 +54,6 @@ private:
   int64_t m_low;
 };
 
-
 #else /* HIGH_PRECISION_I128 */
 
 /**
@@ -88,6 +87,10 @@ private:
 
 #endif /* HIGH_PRECISION_I128 */
 
+HighPrecision Abs (HighPrecision const &value);
+HighPrecision Max (HighPrecision const &a, HighPrecision const &b);
+HighPrecision Min (HighPrecision const &a, HighPrecision const &b);
+
 }; /* namespace ns3 */
 
 #endif /* HIGH_PRECISION_H */