Index: uspace/lib/cpp/include/internal/builtins.hpp
===================================================================
--- uspace/lib/cpp/include/internal/builtins.hpp	(revision 4654b29ee06d04f4c1b864b4461b57d7d0d5b9c4)
+++ uspace/lib/cpp/include/internal/builtins.hpp	(revision 4654b29ee06d04f4c1b864b4461b57d7d0d5b9c4)
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2018 Jaroslav Jindrak
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef LIBCPP_INTERNAL_BUILTINS
+#define LIBCPP_INTERNAL_BUILTINS
+
+/**
+ * Note: While the primary target of libcpp is the
+ *       g++ compiler, using builtin functions that would
+ *       unnecessarily limit the library to any specific
+ *       compiler is discouraged and as such all the used
+ *       builtins should be available atleast in g++ and
+ *       clang++.
+ * GCC:  https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html
+ * LLVM: https://github.com/llvm-mirror/clang/blob/master/include/clang/Basic/Builtins.def
+ *       (If anyone has a better link for LLVM, feel free to update it.)
+ */
+
+namespace std::aux
+{
+    template<class T>
+    double log2(T val)
+    {
+        return __builtin_log2(static_cast<double>(val));
+    }
+
+    template<class T>
+    double pow2(T exp)
+    {
+        return __builtin_pow(2.0, static_cast<double>(val));
+    }
+
+    template<class T>
+    double ceil(T val)
+    {
+        return __builtin_ceil(static_cast<double>(val));
+    }
+}
+
+#endif