/* * 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_ #ifdef __cplusplus namespace libyuv { extern "C" { #endif // Internal flag to indicate cpuid is initialized. 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; // 0x400 reserved for AVX2. // 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. // MaskCpuFlags(-1) to enable all cpu specific optimizations. // MaskCpuFlags(0) to disable all cpu specific optimizations. void MaskCpuFlags(int enable_flags); // Low level cpuid for X86. Returns zeros on other CPUs. void CpuId(int cpu_info[4], int info_type); #ifdef __cplusplus } // extern "C" } // namespace libyuv #endif #endif // INCLUDE_LIBYUV_CPU_ID_H_ NOLINT