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#include "libm.h" // for ldshape, ldshape::(anonymous), FORCE_EVAL
#include <float.h> // for LDBL_MANT_DIG, LDBL_MAX_EXP, LDBL_EPSILON
#include <math.h> // for roundl
#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
long double roundl(long double x)
{
return round(x);
}
#elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
static const long double toint = 1 / LDBL_EPSILON;
long double roundl(long double x)
{
union ldshape u = { x };
int e = u.i.se & 0x7fff;
long double y;
if (e >= 0x3fff + LDBL_MANT_DIG - 1)
return x;
if (u.i.se >> 15)
x = -x;
if (e < 0x3fff - 1) {
FORCE_EVAL(x + toint);
return 0 * u.f;
}
y = x + toint - toint - x;
if (y > 0.5)
y = y + x - 1;
else if (y <= -0.5)
y = y + x + 1;
else
y = y + x;
if (u.i.se >> 15)
y = -y;
return y;
}
#endif
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