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      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 WEBRTC_SYSTEM_WRAPPERS_INTERFACE_CPU_FEATURES_WRAPPER_H_
     12 #define WEBRTC_SYSTEM_WRAPPERS_INTERFACE_CPU_FEATURES_WRAPPER_H_
     13 
     14 #if defined(__cplusplus) || defined(c_plusplus)
     15 extern "C" {
     16 #endif
     17 
     18 #include <typedefs.h>
     19 
     20 // List of features in x86.
     21 typedef enum {
     22   kSSE2,
     23   kSSE3
     24 } CPUFeature;
     25 
     26 // List of features in ARM.
     27 enum {
     28   kCPUFeatureARMv7       = (1 << 0),
     29   kCPUFeatureVFPv3       = (1 << 1),
     30   kCPUFeatureNEON        = (1 << 2),
     31   kCPUFeatureLDREXSTREX  = (1 << 3)
     32 };
     33 
     34 typedef int (*WebRtc_CPUInfo)(CPUFeature feature);
     35 // returns true if the CPU supports the feature.
     36 extern WebRtc_CPUInfo WebRtc_GetCPUInfo;
     37 // No CPU feature is available => straight C path.
     38 extern WebRtc_CPUInfo WebRtc_GetCPUInfoNoASM;
     39 
     40 // Return the features in an ARM device.
     41 // It detects the features in the hardware platform, and returns supported
     42 // values in the above enum definition as a bitmask.
     43 extern uint64_t WebRtc_GetCPUFeaturesARM(void);
     44 
     45 #if defined(__cplusplus) || defined(c_plusplus)
     46 }    // extern "C"
     47 #endif
     48 
     49 #endif // WEBRTC_SYSTEM_WRAPPERS_INTERFACE_CPU_FEATURES_WRAPPER_H_
     50