1 /*
2  *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
3  *
4  *  Use of this source code is governed by a BSD-style license
5  *  that can be found in the LICENSE file in the root of the source
6  *  tree. An additional intellectual property rights grant can be found
7  *  in the file PATENTS.  All contributing project authors may
8  *  be found in the AUTHORS file in the root of the source tree.
9  */
10 
11 #ifndef SYSTEM_WRAPPERS_INCLUDE_CPU_FEATURES_WRAPPER_H_
12 #define SYSTEM_WRAPPERS_INCLUDE_CPU_FEATURES_WRAPPER_H_
13 
14 #include <stdint.h>
15 
16 namespace webrtc {
17 
18 // List of features in x86.
19 typedef enum { kSSE2, kSSE3, kAVX2 } CPUFeature;
20 
21 // List of features in ARM.
22 enum {
23   kCPUFeatureARMv7 = (1 << 0),
24   kCPUFeatureVFPv3 = (1 << 1),
25   kCPUFeatureNEON = (1 << 2),
26   kCPUFeatureLDREXSTREX = (1 << 3)
27 };
28 
29 // Returns true if the CPU supports the feature.
30 int GetCPUInfo(CPUFeature feature);
31 
32 // No CPU feature is available => straight C path.
33 int GetCPUInfoNoASM(CPUFeature feature);
34 
35 // Return the features in an ARM device.
36 // It detects the features in the hardware platform, and returns supported
37 // values in the above enum definition as a bitmask.
38 uint64_t GetCPUFeaturesARM(void);
39 
40 }  // namespace webrtc
41 
42 #endif  // SYSTEM_WRAPPERS_INCLUDE_CPU_FEATURES_WRAPPER_H_
43