ref: 8e8e2d11bfb2f6dd90051b2ca897190fe99a0fbd
dir: /third_party/libyuv/include/libyuv/cpu_id.h/
/* * Copyright 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_ // NOLINT #define INCLUDE_LIBYUV_CPU_ID_H_ #include "libyuv/basic_types.h" #ifdef __cplusplus namespace libyuv { extern "C" { #endif // Internal flag to indicate cpuid requires initialization. static const int kCpuInitialized = 0x1; // These flags are only valid on ARM processors. static const int kCpuHasARM = 0x2; static const int kCpuHasNEON = 0x4; // 0x8 reserved for future ARM flag. // These flags are only valid on x86 processors. static const int kCpuHasX86 = 0x10; static const int kCpuHasSSE2 = 0x20; static const int kCpuHasSSSE3 = 0x40; static const int kCpuHasSSE41 = 0x80; static const int kCpuHasSSE42 = 0x100; static const int kCpuHasAVX = 0x200; static const int kCpuHasAVX2 = 0x400; static const int kCpuHasERMS = 0x800; static const int kCpuHasFMA3 = 0x1000; static const int kCpuHasAVX3 = 0x2000; // 0x2000, 0x4000, 0x8000 reserved for future X86 flags. // These flags are only valid on MIPS processors. static const int kCpuHasMIPS = 0x10000; static const int kCpuHasDSPR2 = 0x20000; // Internal function used to auto-init. LIBYUV_API int InitCpuFlags(void); // Internal function for parsing /proc/cpuinfo. LIBYUV_API int ArmCpuCaps(const char* cpuinfo_name); // 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) { LIBYUV_API extern int cpu_info_; return (!cpu_info_ ? InitCpuFlags() : cpu_info_) & test_flag; } // For testing, allow CPU flags to be disabled. // ie MaskCpuFlags(~kCpuHasSSSE3) to disable SSSE3. // MaskCpuFlags(-1) to enable all cpu specific optimizations. // MaskCpuFlags(1) to disable all cpu specific optimizations. LIBYUV_API void MaskCpuFlags(int enable_flags); // Low level cpuid for X86. Returns zeros on other CPUs. // eax is the info type that you want. // ecx is typically the cpu number, and should normally be zero. LIBYUV_API void CpuId(uint32 eax, uint32 ecx, uint32* cpu_info); #ifdef __cplusplus } // extern "C" } // namespace libyuv #endif #endif // INCLUDE_LIBYUV_CPU_ID_H_ NOLINT