1 /*
2  *  Copyright (c) 2011 The LibYuv 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 INCLUDE_LIBYUV_CPU_ID_H_
12 #define INCLUDE_LIBYUV_CPU_ID_H_
13 
14 #ifdef __cplusplus
15 namespace libyuv {
16 extern "C" {
17 #endif
18 
19 // These flags are only valid on x86 processors
20 static const int kCpuHasSSE2 = 1;
21 static const int kCpuHasSSSE3 = 2;
22 
23 // These flags are only valid on ARM processors
24 static const int kCpuHasNEON = 4;
25 
26 // Internal flag to indicate cpuid is initialized.
27 static const int kCpuInitialized = 8;
28 
29 // Detect CPU has SSE2 etc.
30 // test_flag parameter should be one of kCpuHas constants above
31 // returns non-zero if instruction set is detected
TestCpuFlag(int test_flag)32 static __inline int TestCpuFlag(int test_flag) {
33   extern int cpu_info_;
34   extern int InitCpuFlags();
35   return (cpu_info_ ? cpu_info_ : InitCpuFlags()) & test_flag;
36 }
37 
38 // For testing, allow CPU flags to be disabled.
39 // ie MaskCpuFlags(~kCpuHasSSSE3) to disable SSSE3.
40 // -1 to enable all cpu specific optimizations.
41 // 0 to disable all cpu specific optimizations.
42 void MaskCpuFlags(int enable_flags);
43 
44 #ifdef __cplusplus
45 }  // extern "C"
46 }  // namespace libyuv
47 #endif
48 
49 #endif  // INCLUDE_LIBYUV_CPU_ID_H_
50