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VC++ 获取CPU信息的方法

#include "StdAfx.h" #include "cpuassembly.h" // bit flags set by cpuid when called with register eax set to 1 #define MMX_SUPPORTED 0x00800000 #define SSE_SUPPORTED 0x02000000 #define SSE2_SUPPORTED 0x04000000 #define AMD_3DNOW_SUPPORTED 0x80000000 // AMD specific #define AMD_3DNOW_EX_SUPPORTED 0x40000000 #define AMD_MMX_EX_SUPPORTED 0x00400000 #define SUPPORT_MMX 0x0001 #define SUPPORT_3DNOW 0x0002 #define SUPPORT_SSE 0x0004 #define SUPPORT_SSE2 0x0008 CPUAssembly::CPUAssembly(void) { memset(&sCPUInfo, 0, sizeof(sCPUInfo)); } CPUAssembly::~CPUAssembly(void) { } bool CPUAssembly::IsCPUID() const { __try { _asm { xor eax, eax cpuid } } __except (EXCEPTION_EXECUTE_HANDLER) { return false; } return true; } bool CPUAssembly::QueryCPUInfo() { if (!IsCPUID()) return false; memset(&sCPUInfo, 0, sizeof(sCPUInfo)); DWORD dwStandard = 0; DWORD dwFeature = 0; DWORD dwMax = 0; DWORD dwExt = 0; int feature = 0; int os_support = 0; union { char cBuffer[12+1]; struct { DWORD dw0; DWORD dw1; DWORD dw2; } stc; } Vendor; memset(&Vendor, 0, sizeof(Vendor)); _asm { push ebx push ecx push edx // get the vendor string xor eax, eax cpuid mov dwMax, eax mov Vendor.stc.dw0, ebx mov Vendor.stc.dw1, edx mov Vendor.stc.dw2, ecx // get the Standard bits mov eax, 1 cpuid mov dwStandard, eax mov dwFeature, edx // get AMD-specials mov eax, 80000000h cpuid cmp eax, 80000000h jc notamd mov eax, 80000001h cpuid mov dwExt, edx notamd: pop ecx pop ebx pop edx } if (dwFeature & MMX_SUPPORTED) sCPUInfo.dwFeatures |= SUPPORT_MMX; if (dwExt & AMD_3DNOW_SUPPORTED) sCPUInfo.dwFeatures |= SUPPORT_3DNOW; if (dwFeature & SSE_SUPPORTED) sCPUInfo.dwFeatures |= SUPPORT_SSE; if (dwFeature & SSE2_SUPPORTED) sCPUInfo.dwFeatures |= SUPPORT_SSE2; sCPUInfo.iFamily = (short int)((dwStandard >> 8) & 0xF); // retrieve family if (sCPUInfo.iFamily == 15) // retrieve extended family sCPUInfo.iFamilyEx = (dwStandard >> 16) & 0xFF0; sCPUInfo.iModel = (short int)((dwStandard >> 4) & 0xF); // retrieve model if (sCPUInfo.iModel == 15) // retrieve extended model sCPUInfo.iModelEx = (dwStandard >> 12) & 0xF; sCPUInfo.iStepping = (short int)((dwStandard) & 0xF); // retrieve stepping strcpy(sCPUInfo.sVendorName, Vendor.cBuffer); sCPUInfo.iSpeed = ICPUInfo::GetSpeed(); strcpy(sCPUInfo.sProcessorName, ICPUInfo::GetCPUName(sCPUInfo.sVendorName, sCPUInfo.iFamily, sCPUInfo.iModel, sCPUInfo.iFamilyEx, sCPUInfo.iModelEx).c_str()); return true; } unsigned int CPUAssembly::GetSpeedMHz() const { return (unsigned int)(sCPUInfo.iSpeed/(1024*1024)); } std::string CPUAssembly::GetCPUName() const { return sCPUInfo.sProcessorName; } std::string CPUAssembly::GetVendorName() const { return sCPUInfo.sVendorName; } short int CPUAssembly::GetCPUFamily() const { return sCPUInfo.iFamily; } short int CPUAssembly::GetCPUModel() const { return sCPUInfo.iModel; } short int CPUAssembly::GetCPUStepping() const { return sCPUInfo.iStepping; } bool CPUAssembly::IsMMXSupported() const { return ((sCPUInfo.dwFeatures & SUPPORT_MMX) == SUPPORT_MMX); } bool CPUAssembly::IsSSESupported() const { return ((sCPUInfo.dwFeatures & SUPPORT_SSE) == SUPPORT_SSE); } bool CPUAssembly::IsSSE2Supported() const { return ((sCPUInfo.dwFeatures & SUPPORT_SSE2) == SUPPORT_SSE2); } bool CPUAssembly::Is3DNowSupported() const { return ((sCPUInfo.dwFeatures & SUPPORT_3DNOW) == SUPPORT_3DNOW); }

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