1 #include "libm.h"
2 
3 #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
floorl(long double x)4 long 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 
10 static const long double toint = 1/LDBL_EPSILON;
11 
floorl(long double x)12 long 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