c语言查看cpu支持的指令集,如何检查CPU是否支持SSE3指令集？

蓝山帝景

我创建了一个GitHub repro，它将检测所有主要x86 ISA扩展的CPU和操作系统支持：https : //github.com/Mysticial/FeatureDetector这是一个简短的版本：首先，您需要访问CPUID指令：#ifdef _WIN32//  Windows#define cpuid(info, x)    __cpuidex(info, x, 0)#else//  GCC Intrinsics#include void cpuid(int info[4], int InfoType){    __cpuid_count(InfoType, 0, info[0], info[1], info[2], info[3]);}#endif然后，您可以运行以下代码：//  Misc.bool HW_MMX;bool HW_x64;bool HW_ABM;      // Advanced Bit Manipulationbool HW_RDRAND;bool HW_BMI1;bool HW_BMI2;bool HW_ADX;bool HW_PREFETCHWT1;//  SIMD: 128-bitbool HW_SSE;bool HW_SSE2;bool HW_SSE3;bool HW_SSSE3;bool HW_SSE41;bool HW_SSE42;bool HW_SSE4a;bool HW_AES;bool HW_SHA;//  SIMD: 256-bitbool HW_AVX;bool HW_XOP;bool HW_FMA3;bool HW_FMA4;bool HW_AVX2;//  SIMD: 512-bitbool HW_AVX512F;    //  AVX512 Foundationbool HW_AVX512CD;   //  AVX512 Conflict Detectionbool HW_AVX512PF;   //  AVX512 Prefetchbool HW_AVX512ER;   //  AVX512 Exponential + Reciprocalbool HW_AVX512VL;   //  AVX512 Vector Length Extensionsbool HW_AVX512BW;   //  AVX512 Byte + Wordbool HW_AVX512DQ;   //  AVX512 Doubleword + Quadwordbool HW_AVX512IFMA; //  AVX512 Integer 52-bit Fused Multiply-Addbool HW_AVX512VBMI; //  AVX512 Vector Byte Manipulation Instructionsint info[4];cpuid(info, 0);int nIds = info[0];cpuid(info, 0x80000000);unsigned nExIds = info[0];//  Detect Featuresif (nIds >= 0x00000001){    cpuid(info,0x00000001);    HW_MMX    = (info[3] & ((int)1 << 23)) != 0;    HW_SSE    = (info[3] & ((int)1 << 25)) != 0;    HW_SSE2   = (info[3] & ((int)1 << 26)) != 0;    HW_SSE3   = (info[2] & ((int)1 <= 0x00000007){    cpuid(info,0x00000007);    HW_AVX2   = (info[1] & ((int)1 <= 0x80000001){    cpuid(info,0x80000001);    HW_x64   = (info[3] & ((int)1 << 29)) != 0;    HW_ABM   = (info[2] & ((int)1 <