1#include "libm.h"
2
3#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
4long double scalbnl(long double x, int n)
5{
6	return scalbn(x, n);
7}
8#elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
9long double scalbnl(long double x, int n)
10{
11	union ldshape u;
12
13	if (n > 16383) {
14		x *= 0x1p16383L;
15		n -= 16383;
16		if (n > 16383) {
17			x *= 0x1p16383L;
18			n -= 16383;
19			if (n > 16383)
20				n = 16383;
21		}
22	} else if (n < -16382) {
23		x *= 0x1p-16382L * 0x1p113L;
24		n += 16382 - 113;
25		if (n < -16382) {
26			x *= 0x1p-16382L * 0x1p113L;
27			n += 16382 - 113;
28			if (n < -16382)
29				n = -16382;
30		}
31	}
32	u.f = 1.0;
33	u.i.se = 0x3fff + n;
34	return x * u.f;
35}
36#endif
37