bionic: move benchmarks out of tests directory

Change-Id: I4d054965198af22c9a9c821d1bc53f4e9ea01248

benchmarks/math_benchmark.cpp

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "benchmark.h"
+
+#include <math.h>
+
+// Avoid optimization.
+double d;
+double v;
+
+static void BM_math_sqrt(int iters) {
+  StartBenchmarkTiming();
+
+  d = 0.0;
+  v = 2.0;
+  for (int i = 0; i < iters; ++i) {
+    d += sqrt(v);
+  }
+
+  StopBenchmarkTiming();
+}
+BENCHMARK(BM_math_sqrt);
+
+static void BM_math_log10(int iters) {
+  StartBenchmarkTiming();
+
+  d = 0.0;
+  v = 1234.0;
+  for (int i = 0; i < iters; ++i) {
+    d += log10(v);
+  }
+
+  StopBenchmarkTiming();
+}
+BENCHMARK(BM_math_log10);
+
+static void BM_math_logb(int iters) {
+  StartBenchmarkTiming();
+
+  d = 0.0;
+  v = 1234.0;
+  for (int i = 0; i < iters; ++i) {
+    d += logb(v);
+  }
+
+  StopBenchmarkTiming();
+}
+BENCHMARK(BM_math_logb);