| /* |
| * Copyright (c) 2011 The LibYuv project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #ifndef INCLUDE_LIBYUV_CPU_ID_H_ |
| #define INCLUDE_LIBYUV_CPU_ID_H_ |
| |
| #ifdef __cplusplus |
| namespace libyuv { |
| extern "C" { |
| #endif |
| |
| // These flags are only valid on x86 processors |
| static const int kCpuHasSSE2 = 1; |
| static const int kCpuHasSSSE3 = 2; |
| |
| // These flags are only valid on ARM processors |
| static const int kCpuHasNEON = 4; |
| |
| // Internal flag to indicate cpuid is initialized. |
| static const int kCpuInitialized = 8; |
| |
| // Detect CPU has SSE2 etc. |
| // test_flag parameter should be one of kCpuHas constants above |
| // returns non-zero if instruction set is detected |
| static __inline int TestCpuFlag(int test_flag) { |
| extern int cpu_info_; |
| extern int InitCpuFlags(); |
| return (cpu_info_ ? cpu_info_ : InitCpuFlags()) & test_flag; |
| } |
| |
| // For testing, allow CPU flags to be disabled. |
| // ie MaskCpuFlags(~kCpuHasSSSE3) to disable SSSE3. |
| // -1 to enable all cpu specific optimizations. |
| // 0 to disable all cpu specific optimizations. |
| void MaskCpuFlags(int enable_flags); |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| } // namespace libyuv |
| #endif |
| |
| #endif // INCLUDE_LIBYUV_CPU_ID_H_ |