mirror of
https://github.com/ultimatepp/ultimatepp.git
synced 2026-05-16 22:02:58 -06:00
66 lines
No EOL
1.5 KiB
C++
66 lines
No EOL
1.5 KiB
C++
#include "SysInfo.h"
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using namespace Upp;
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#if defined(PLATFORM_WIN32) || defined (PLATFORM_WIN64)
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uint64 start, end;
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unsigned long nCtr, nFreq, nCtrStop;
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#if defined(__MINGW32__)
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uint64 __rdtsc() {
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#if defined(__MINGW64__) // It does not work for now
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unsigned int lo, hi;
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__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi));
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return uint64(lo) | (uint64(hi) << 32);
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#else
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unsigned int lo, hi;
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__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi));
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return uint64(lo) | (uint64(hi) << 32);
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#endif
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}
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#endif
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int GetCpuSpeed()
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{
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if(!QueryPerformanceFrequency((LARGE_INTEGER *) &nFreq))
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return 0;
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QueryPerformanceCounter((LARGE_INTEGER *) &nCtrStop);
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nCtrStop += nFreq;
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start = __rdtsc();
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do
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QueryPerformanceCounter((LARGE_INTEGER *) &nCtr);
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while (nCtr < nCtrStop);
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end = __rdtsc();
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return int((end - start)/1000000);
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}
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#endif
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#if defined(PLATFORM_POSIX)
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#define __rdtsc(tm) __asm__ __volatile__ (".byte 0x0f; .byte 0x31" :"=a" (tm))
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#define COUNT_SEC (double)tv.tv_sec + (1.e-6)*tv.tv_usec
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int GetCpuSpeed()
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{
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struct timeval tv;
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double cnt1, cnt2;
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unsigned long start, end;
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__rdtsc(start);
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gettimeofday(&tv, 0);
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cnt1 = COUNT_SEC + 0.01;
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do {
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gettimeofday(&tv, 0);
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cnt2 = COUNT_SEC;
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} while(cnt2 < cnt1);
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__rdtsc(end);
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return int((end-start)/10000);
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}
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#endif
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//END_UPP_NAMESPACE
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