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
21 namespace android {
22
clz(int32_t x)23 int inline clz(int32_t x) {
24 return __builtin_clz(x);
25 }
26
27 template <typename T>
min(T a,T b)28 static inline T min(T a, T b) {
29 return a<b ? a : b;
30 }
31 template <typename T>
min(T a,T b,T c)32 static inline T min(T a, T b, T c) {
33 return min(a, min(b, c));
34 }
35 template <typename T>
min(T a,T b,T c,T d)36 static inline T min(T a, T b, T c, T d) {
37 return min(a, b, min(c, d));
38 }
39
40 template <typename T>
max(T a,T b)41 static inline T max(T a, T b) {
42 return a>b ? a : b;
43 }
44 template <typename T>
max(T a,T b,T c)45 static inline T max(T a, T b, T c) {
46 return max(a, max(b, c));
47 }
48 template <typename T>
max(T a,T b,T c,T d)49 static inline T max(T a, T b, T c, T d) {
50 return max(a, b, max(c, d));
51 }
52
53 template <typename T>
54 static inline
swap(T & a,T & b)55 void 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