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Add CPUID support

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michaelangel007 2025-03-25 17:54:28 -07:00
parent 69bf1a1814
commit 81129253ae
1 changed files with 60 additions and 0 deletions
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60
source/Windows/Win32Frame.cpp
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@ -16,6 +16,66 @@
// Win32Frame methods are implemented in AppleWin, WinFrame and WinVideo.
// in time they should be brought together and more freestanding functions added to Win32Frame.
#include <intrin.h>
class InstructionSet
{
public:
InstructionSet()
{
enum
{
RAX = 0,
RBX = 1,
RCX = 2,
RDX = 3
};
int cpuinfo[4]; // RAX, RBX, RCX, RDX
memset(vendor , 0, sizeof(vendor ));
memset(brand , 0, sizeof(brand ));
memset(functionData, 0, sizeof(functionData));
memset(extendedData, 0, sizeof(extendedData));
__cpuid( (int*)cpuinfo, 0x0 ); // 0x0 get highest valid function ID.
__cpuidex( &functionData[0][RAX], 0x0, 0 );
__cpuid( cpuinfo, 0x80000000 ); // 0x80000000 get highest valid extended ID.
numExtendedIds = cpuinfo[0];
if (numExtendedIds >= 0x80000004)
for (int idxExtendedId = 0x80000002; idxExtendedId <= 0x80000004; ++idxExtendedId)
__cpuidex( &extendedData[ idxExtendedId - 0x80000000 ][0], idxExtendedId, 0 );
// Vendor: AMD, Intel, etc.
int *pDst = (int*)&vendor;
*pDst++ = cpuinfo[RBX];
*pDst++ = cpuinfo[RDX];
*pDst++ = cpuinfo[RCX];
isAMD = strcmp( vendor, "AuthenticAMD" ) == 0;
isIntel = strcmp( vendor, "GenuineIntel" ) == 0;
// Brand: AMD Ryzen Threadripper 3960X 24-Core Processor, etc.
for( int i = 0; i < 3; ++i )
memcpy(brand + 16*i, &extendedData[i+2][0], sizeof(cpuinfo));
}
int numFunctionIds;
int numExtendedIds;
char vendor[0x20];
char brand [0x40];
int functionData[1][4];
int extendedData[5][4];
bool isAMD;
bool isIntel;
};
InstructionSet gInstructionSet;
Win32Frame::Win32Frame()
{
g_pFramebufferinfo = NULL;