math_benchmark.cpp revision 9edb3e004b487e08cbbb54f2af18b15241550513 
1/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "benchmark.h"
18
19#include <math.h>
20
21// Avoid optimization.
22double d;
23double v;
24
25static void BM_math_sqrt(int iters) {
26  StartBenchmarkTiming();
27
28  d = 0.0;
29  v = 2.0;
30  for (int i = 0; i < iters; ++i) {
31    d += sqrt(v);
32  }
33
34  StopBenchmarkTiming();
35}
36BENCHMARK(BM_math_sqrt);
37
38static void BM_math_log10(int iters) {
39  StartBenchmarkTiming();
40
41  d = 0.0;
42  v = 1234.0;
43  for (int i = 0; i < iters; ++i) {
44    d += log10(v);
45  }
46
47  StopBenchmarkTiming();
48}
49BENCHMARK(BM_math_log10);
50
51static void BM_math_logb(int iters) {
52  StartBenchmarkTiming();
53
54  d = 0.0;
55  v = 1234.0;
56  for (int i = 0; i < iters; ++i) {
57    d += logb(v);
58  }
59
60  StopBenchmarkTiming();
61}
62BENCHMARK(BM_math_logb);
63