1#include "libm.h"
2
3#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
4long double floorl(long double x)
5{
6	return floor(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 floorl(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 || x == 0)
19		return x;
20	/* y = int(x) - x, where int(x) is an integer neighbor of x */
21	if (u.i.se >> 15)
22		y = x - toint + toint - x;
23	else
24		y = x + toint - toint - x;
25	/* special case because of non-nearest rounding modes */
26	if (e <= 0x3fff-1) {
27		FORCE_EVAL(y);
28		return u.i.se >> 15 ? -1 : 0;
29	}
30	if (y > 0)
31		return x + y - 1;
32	return x + y;
33}
34#endif
35