Add scalar grid operations tanh & signum

amdis/gridfunctions/Operations.hpp

@@ -111,6 +111,22 @@ namespace AMDiS
     return invokeAtQP([](auto const& v) { using std::abs; return abs(v); }, FWD(value));
   }
 
+  /// \brief Applies \ref Operation::Tanh to GridFunctions. \relates ComposerGridFunction
+  template <class T,
+    REQUIRES(Concepts::AnyGridFunction<T>)>
+  auto tanh(T&& value)
+  {
+    return invokeAtQP([](auto const& v) { using std::tanh; return tanh(v); }, FWD(value));
+  }
+
+  /// \brief Applies \ref Operation::Signum to GridFunctions. \relates ComposerGridFunction
+  template <class T,
+    REQUIRES(Concepts::AnyGridFunction<T>)>
+  auto signum(T&& value)
+  {
+    return invokeAtQP([](auto const& v) { return v > 0.0 ? 1.0 : -1.0; }, FWD(value));
+  }
+
   /// \brief Applies \ref Operation::Sqr to GridFunction. \relates ComposerGridFunction
   template <class T,
     REQUIRES(Concepts::AnyGridFunction<T>)>