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89 lines
1.5 KiB
C++
89 lines
1.5 KiB
C++
// This code is in the public domain -- castanyo@yahoo.es
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#ifndef NV_CORE_CPUINFO_H
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#define NV_CORE_CPUINFO_H
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#include <nvcore/nvcore.h>
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#if NV_CC_MSVC
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# include <intrin.h> // __rdtsc
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#endif
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namespace nv
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{
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// CPU Information.
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class CpuInfo
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{
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static uint processorCount();
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static uint coreCount();
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static bool hasMMX();
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static bool hasSSE();
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static bool hasSSE2();
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static bool hasSSE3();
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};
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#if NV_CC_MSVC
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#pragma intrinsic(__rdtsc)
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inline uint64 rdtsc()
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{
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return __rdtsc();
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}
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#endif
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#if NV_CC_GNUC
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#if defined(__i386__)
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inline /*volatile*/ uint64 rdtsc()
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{
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uint64 x;
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//__asm__ volatile ("rdtsc" : "=A" (x));
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__asm__ volatile (".byte 0x0f, 0x31" : "=A" (x));
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return x;
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}
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#elif defined(__x86_64__)
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static __inline__ uint64 rdtsc(void)
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{
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unsigned int hi, lo;
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__asm__ __volatile__ ("rdtsc" : "=a"(lo), "=d"(hi));
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return ( (unsigned long long)lo)|( ((unsigned long long)hi)<<32 );
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}
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#elif defined(__powerpc__)
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static __inline__ uint64 rdtsc(void)
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{
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uint64 result=0;
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unsigned long int upper, lower, tmp;
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__asm__ volatile(
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"0: \n"
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"\tmftbu %0 \n"
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"\tmftb %1 \n"
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"\tmftbu %2 \n"
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"\tcmpw %2,%0 \n"
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"\tbne 0b \n"
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: "=r"(upper),"=r"(lower),"=r"(tmp)
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);
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result = upper;
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result = result<<32;
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result = result|lower;
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return(result);
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}
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#endif
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#endif // NV_CC_GNUC
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} // nv namespace
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#endif // NV_CORE_CPUINFO_H
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