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81 lines
2.5 KiB
81 lines
2.5 KiB
/*
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* Copyright 2011 The LibYuv Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef INCLUDE_LIBYUV_CPU_ID_H_
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#define INCLUDE_LIBYUV_CPU_ID_H_
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#include "libyuv/basic_types.h"
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#ifdef __cplusplus
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namespace libyuv {
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extern "C" {
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#endif
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// Internal flag to indicate cpuid requires initialization.
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static const int kCpuInitialized = 0x1;
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// These flags are only valid on ARM processors.
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static const int kCpuHasARM = 0x2;
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static const int kCpuHasNEON = 0x4;
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// 0x8 reserved for future ARM flag.
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// These flags are only valid on x86 processors.
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static const int kCpuHasX86 = 0x10;
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static const int kCpuHasSSE2 = 0x20;
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static const int kCpuHasSSSE3 = 0x40;
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static const int kCpuHasSSE41 = 0x80;
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static const int kCpuHasSSE42 = 0x100;
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static const int kCpuHasAVX = 0x200;
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static const int kCpuHasAVX2 = 0x400;
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static const int kCpuHasERMS = 0x800;
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static const int kCpuHasFMA3 = 0x1000;
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static const int kCpuHasAVX3 = 0x2000;
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// 0x2000, 0x4000, 0x8000 reserved for future X86 flags.
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// These flags are only valid on MIPS processors.
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static const int kCpuHasMIPS = 0x10000;
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static const int kCpuHasDSPR2 = 0x20000;
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static const int kCpuHasMSA = 0x40000;
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// Internal function used to auto-init.
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LIBYUV_API
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int InitCpuFlags(void);
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// Internal function for parsing /proc/cpuinfo.
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LIBYUV_API
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int ArmCpuCaps(const char* cpuinfo_name);
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// Detect CPU has SSE2 etc.
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// Test_flag parameter should be one of kCpuHas constants above.
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// returns non-zero if instruction set is detected
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static __inline int TestCpuFlag(int test_flag) {
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LIBYUV_API extern int cpu_info_;
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return (!cpu_info_ ? InitCpuFlags() : cpu_info_) & test_flag;
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}
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// For testing, allow CPU flags to be disabled.
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// ie MaskCpuFlags(~kCpuHasSSSE3) to disable SSSE3.
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// MaskCpuFlags(-1) to enable all cpu specific optimizations.
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// MaskCpuFlags(1) to disable all cpu specific optimizations.
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LIBYUV_API
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void MaskCpuFlags(int enable_flags);
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// Low level cpuid for X86. Returns zeros on other CPUs.
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// eax is the info type that you want.
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// ecx is typically the cpu number, and should normally be zero.
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LIBYUV_API
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void CpuId(uint32 eax, uint32 ecx, uint32* cpu_info);
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#ifdef __cplusplus
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} // extern "C"
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} // namespace libyuv
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#endif
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#endif // INCLUDE_LIBYUV_CPU_ID_H_
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