|
|
https://msdn.microsoft.com/en-us/library/hskdteyh(v=VS.80).aspx
// cpuid.cpp
// processor: x86, x64
// Use the __cpuid intrinsic to get information about a CPU
#include <stdio.h>
#include <string.h>
#include <intrin.h>
const char* szFeatures[] =
{
"x87 FPU On Chip",
"Virtual-8086 Mode Enhancement",
"Debugging Extensions",
"Page Size Extensions",
"Time Stamp Counter",
"RDMSR and WRMSR Support",
"Physical Address Extensions",
"Machine Check Exception",
"CMPXCHG8B Instruction",
"APIC On Chip",
"Unknown1",
"SYSENTER and SY**IT",
"Memory Type Range Registers",
"PTE Global Bit",
"Machine Check Architecture",
"Conditional Move/Compare Instruction",
"Page Attribute Table",
"Page Size Extension",
"Processor Serial Number",
"CFLUSH Extension",
"Unknown2",
"Debug Store",
"Thermal Monitor and Clock Ctrl",
"MMX Technology",
"FXSAVE/FXRSTOR",
"SSE Extensions",
"SSE2 Extensions",
"Self Snoop",
"Hyper-threading Technology",
"Thermal Monitor",
"Unknown4",
"Pend. Brk. EN."
};
int main(int argc, char* argv[])
{
char CPUString[0x20];
char CPUBrandString[0x40];
int CPUInfo[4] = {-1};
int nSteppingID = 0;
int nModel = 0;
int nFamily = 0;
int nProcessorType = 0;
int nExtendedmodel = 0;
int nExtendedfamily = 0;
int nBrandIndex = 0;
int nCLFLUSHcachelinesize = 0;
int nAPICPhysicalID = 0;
int nFeatureInfo = 0;
int nCacheLineSize = 0;
int nL2Associativity = 0;
int nCacheSizeK = 0;
int nRet = 0;
unsigned nIds, nExIds, i;
bool bSSE3NewInstructions = false;
bool bMONITOR_MWAIT = false;
bool bCPLQualifiedDebugStore = false;
bool bThermalMonitor2 = false;
// __cpuid with an InfoType argument of 0 returns the number of
// valid Ids in CPUInfo[0] and the CPU identification string in
// the other three array elements. The CPU identification string is
// not in linear order. The code below arranges the information
// in a human readable form.
__cpuid(CPUInfo, 0);
nIds = CPUInfo[0];
memset(CPUString, 0, sizeof(CPUString));
*((int*)CPUString) = CPUInfo[1];
*((int*)(CPUString+4)) = CPUInfo[3];
*((int*)(CPUString+8)) = CPUInfo[2];
// Get the information associated with each valid Id
for (i=0; i<=nIds; ++i)
{
__cpuid(CPUInfo, i);
printf_s("\nFor InfoType %d\n", i);
printf_s("CPUInfo[0] = 0x%x\n", CPUInfo[0]);
printf_s("CPUInfo[1] = 0x%x\n", CPUInfo[1]);
printf_s("CPUInfo[2] = 0x%x\n", CPUInfo[2]);
printf_s("CPUInfo[3] = 0x%x\n", CPUInfo[3]);
// Interpret CPU feature information.
if (i == 1)
{
nSteppingID = CPUInfo[0] & 0xf;
nModel = (CPUInfo[0] >> 4) & 0xf;
nFamily = (CPUInfo[0] >> 8) & 0xf;
nProcessorType = (CPUInfo[0] >> 12) & 0x3;
nExtendedmodel = (CPUInfo[0] >> 16) & 0xf;
nExtendedfamily = (CPUInfo[0] >> 20) & 0xff;
nBrandIndex = CPUInfo[1] & 0xff;
nCLFLUSHcachelinesize = ((CPUInfo[1] >> 8) & 0xff) * 8;
nAPICPhysicalID = (CPUInfo[1] >> 24) & 0xff;
bSSE3NewInstructions = (CPUInfo[2] & 0x1) || false;
bMONITOR_MWAIT = (CPUInfo[2] & 0x8) || false;
bCPLQualifiedDebugStore = (CPUInfo[2] & 0x10) || false;
bThermalMonitor2 = (CPUInfo[2] & 0x100) || false;
nFeatureInfo = CPUInfo[3];
}
}
// Calling __cpuid with 0x80000000 as the InfoType argument
// gets the number of valid extended IDs.
__cpuid(CPUInfo, 0x80000000);
nExIds = CPUInfo[0];
memset(CPUBrandString, 0, sizeof(CPUBrandString));
// Get the information associated with each extended ID.
for (i=0x80000000; i<=nExIds; ++i)
{
__cpuid(CPUInfo, i);
printf_s("\nFor InfoType %x\n", i);
printf_s("CPUInfo[0] = 0x%x\n", CPUInfo[0]);
printf_s("CPUInfo[1] = 0x%x\n", CPUInfo[1]);
printf_s("CPUInfo[2] = 0x%x\n", CPUInfo[2]);
printf_s("CPUInfo[3] = 0x%x\n", CPUInfo[3]);
// Interpret CPU brand string and cache information.
if (i == 0x80000002)
memcpy(CPUBrandString, CPUInfo, sizeof(CPUInfo));
else if (i == 0x80000003)
memcpy(CPUBrandString + 16, CPUInfo, sizeof(CPUInfo));
else if (i == 0x80000004)
memcpy(CPUBrandString + 32, CPUInfo, sizeof(CPUInfo));
else if (i == 0x80000006)
{
nCacheLineSize = CPUInfo[2] & 0xff;
nL2Associativity = (CPUInfo[2] >> 12) & 0xf;
nCacheSizeK = (CPUInfo[2] >> 16) & 0xffff;
}
}
// Display all the information in user-friendly format.
printf_s("\n\nCPU String: %s\n", CPUString);
if (nIds >= 1)
{
if (nSteppingID)
printf_s("Stepping ID = %d\n", nSteppingID);
if (nModel)
printf_s("Model = %d\n", nModel);
if (nFamily)
printf_s("Family = %d\n", nFamily);
if (nProcessorType)
printf_s("Processor Type = %d\n", nProcessorType);
if (nExtendedmodel)
printf_s("Extended model = %d\n", nExtendedmodel);
if (nExtendedfamily)
printf_s("Extended family = %d\n", nExtendedfamily);
if (nBrandIndex)
printf_s("Brand Index = %d\n", nBrandIndex);
if (nCLFLUSHcachelinesize)
printf_s("CLFLUSH cache line size = %d\n",
nCLFLUSHcachelinesize);
if (nAPICPhysicalID)
printf_s("APIC Physical ID = %d\n", nAPICPhysicalID);
if (nFeatureInfo || bSSE3NewInstructions ||
bMONITOR_MWAIT || bCPLQualifiedDebugStore ||
bThermalMonitor2)
{
printf_s("\nThe following features are supported:\n");
if (bSSE3NewInstructions)
printf_s("\tSSE3 New Instructions\n");
if (bMONITOR_MWAIT)
printf_s("\tMONITOR/MWAIT\n");
if (bCPLQualifiedDebugStore)
printf_s("\tCPL Qualified Debug Store\n");
if (bThermalMonitor2)
printf_s("\tThermal Monitor 2\n");
i = 0;
nIds = 1;
while (i < (sizeof(szFeatures)/sizeof(const char*)))
{
if (nFeatureInfo & nIds)
{
printf_s("\t");
printf_s(szFeatures);
printf_s("\n");
}
nIds <<= 1;
++i;
}
}
}
if (nExIds >= 0x80000004)
printf_s("\nCPU Brand String: %s\n", CPUBrandString);
if (nExIds >= 0x80000006)
{
printf_s("Cache Line Size = %d\n", nCacheLineSize);
printf_s("L2 Associativity = %d\n", nL2Associativity);
printf_s("Cache Size = %dK\n", nCacheSizeK);
}
return nRet;
} |
|
