1/*
2 * Copyright (C) 2007 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#ifndef ANDROID_SURFACE_FLINGER_CLZ_H
18
19#include <stdint.h>
20
21namespace android {
22
23int inline clz(int32_t x) {
24    return __builtin_clz(x);
25}
26
27template <typename T>
28static inline T min(T a, T b) {
29    return a<b ? a : b;
30}
31template <typename T>
32static inline T min(T a, T b, T c) {
33    return min(a, min(b, c));
34}
35template <typename T>
36static inline T min(T a, T b, T c, T d) {
37    return min(a, b, min(c, d));
38}
39
40template <typename T>
41static inline T max(T a, T b) {
42    return a>b ? a : b;
43}
44template <typename T>
45static inline T max(T a, T b, T c) {
46    return max(a, max(b, c));
47}
48template <typename T>
49static inline T max(T a, T b, T c, T d) {
50    return max(a, b, max(c, d));
51}
52
53template <typename T>
54static inline
55void swap(T& a, T& b) {
56    T t(a);
57    a = b;
58    b = t;
59}
60
61
62}; // namespace android
63
64#endif /* ANDROID_SURFACE_FLINGER_CLZ_H */
65