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| | #include <limits.h>
#include <fenv.h>
#include "libm.h"
#ifdef LONG_DOUBLE_IS_BINARY64
long long llrintl(long double x)
{
return llrint(x);
}
#elif defined(FE_INEXACT)
/*
see comments in lrint.c
Note that if LLONG_MAX == 0x7fffffffffffffff && LDBL_MANT_DIG == 64
then x == 2**63 - 0.5 is the only input that overflows and
raises inexact (with tonearest or upward rounding mode)
*/
long long llrintl(long double x)
{
#pragma STDC FENV_ACCESS ON
int e;
e = fetestexcept(FE_INEXACT);
x = rintl(x);
if (!e && (x > LLONG_MAX || x < LLONG_MIN))
feclearexcept(FE_INEXACT);
/* conversion */
return x;
}
#else
long long llrintl(long double x)
{
return rintl(x);
}
#endif
|