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