1#include "libm.h" 2 3#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024 4long double rintl(long double x) { 5 return rint(x); 6} 7#elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384 8 9static const long double toint = 1 / LDBL_EPSILON; 10 11long double rintl(long double x) { 12 union ldshape u = {x}; 13 int e = u.i.se & 0x7fff; 14 int s = u.i.se >> 15; 15 long double y; 16 17 if (e >= 0x3fff + LDBL_MANT_DIG - 1) 18 return x; 19 if (s) 20 y = x - toint + toint; 21 else 22 y = x + toint - toint; 23 if (y == 0) 24 return 0 * x; 25 return y; 26} 27#endif 28