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#ifndef LRINT_H_
#define LRINT_H_
/**
* Casting a double to an int the fast way.
*/
#if defined (_MSC_VER)
#if defined (_WIN64)
// greebo: It seems VC++ 2012 math.h already provides lrint
#if _MSC_VER >= 1800
#include <math.h>
#else
// Only for SSE2 or x64
#include <emmintrin.h>
// greebo: VC++ x64 doesn't support inline assembly, we have to use x64 intrinsics instead
inline int lrint(const double x)
{
return _mm_cvtsd_si32(_mm_load_sd(&x));
}
#endif
#else
// greebo: It seems VC++ 2012 math.h already provides lrint
#if _MSC_VER >= 1800
#include <math.h>
#else
// Win32 target
inline int lrint (double flt) {
int i;
_asm {
fld flt
fistp i
};
return i;
}
#endif
#endif
#elif defined(__FreeBSD__)
inline int lrint(double f)
{
return static_cast<int>(f + 0.5);
}
#elif defined(__GNUC__)
// lrint is part of ISO C99
#define _ISOC9X_SOURCE 1
#define _ISOC99_SOURCE 1
#define __USE_ISOC9X 1
#define __USE_ISOC99 1
#else
#error "unsupported platform"
#endif
#endif /*LRINT_H_*/
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