1#include "libm.h"
 2
 3#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
 4int __fpclassifyl(long double x)
 5{
 6	return __fpclassify(x);
 7}
 8#elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384
 9int __fpclassifyl(long double x)
10{
11	union ldshape u = {x};
12	int e = u.i.se & 0x7fff;
13	int msb = u.i.m>>63;
14	if (!e && !msb)
15		return u.i.m ? FP_SUBNORMAL : FP_ZERO;
16	if (e == 0x7fff) {
17		/* The x86 variant of 80-bit extended precision only admits
18		 * one representation of each infinity, with the mantissa msb
19		 * necessarily set. The version with it clear is invalid/nan.
20		 * The m68k variant, however, allows either, and tooling uses
21		 * the version with it clear. */
22		if (__BYTE_ORDER == __LITTLE_ENDIAN && !msb)
23			return FP_NAN;
24		return u.i.m << 1 ? FP_NAN : FP_INFINITE;
25	}
26	if (!msb)
27		return FP_NAN;
28	return FP_NORMAL;
29}
30#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384
31int __fpclassifyl(long double x)
32{
33	union ldshape u = {x};
34	int e = u.i.se & 0x7fff;
35	u.i.se = 0;
36	if (!e)
37		return u.i2.lo | u.i2.hi ? FP_SUBNORMAL : FP_ZERO;
38	if (e == 0x7fff)
39		return u.i2.lo | u.i2.hi ? FP_NAN : FP_INFINITE;
40	return FP_NORMAL;
41}
42#endif