math: Added a portable log2()

1 files changed, 29 insertions, 0 deletions

diff --git a/host/tests/math_test.cpp b/host/tests/math_test.cpp
new file mode 100644
index 000000000..6c890c484
--- /dev/null
+++ b/host/tests/math_test.cpp
@@ -0,0 +1,29 @@
+//
+// Copyright 2014 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <boost/test/unit_test.hpp>
+#include <boost/cstdint.hpp>
+#include <uhd/utils/math.hpp>
+
+// NOTE: This is not the only math test case, see e.g. special tests
+// for fp comparison.
+
+BOOST_AUTO_TEST_CASE(test_log2){
+    double y = uhd::math::log2(16.0);
+    BOOST_CHECK_EQUAL(y, 4.0);
+}
+