1#include "libm.h"
2
3#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
4long double roundl(long double x)
5{
6	return round(x);
7}
8#elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
9
10static const long double toint = 1/LDBL_EPSILON;
11
12long double roundl(long double x)
13{
14	union ldshape u = {x};
15	int e = u.i.se & 0x7fff;
16	long double y;
17
18	if (e >= 0x3fff+LDBL_MANT_DIG-1)
19		return x;
20	if (u.i.se >> 15)
21		x = -x;
22	if (e < 0x3fff-1) {
23		FORCE_EVAL(x + toint);
24		return 0*u.f;
25	}
26	y = x + toint - toint - x;
27	if (y > 0.5)
28		y = y + x - 1;
29	else if (y <= -0.5)
30		y = y + x + 1;
31	else
32		y = y + x;
33	if (u.i.se >> 15)
34		y = -y;
35	return y;
36}
37#endif
38