1#include "libm.h"
 2
 3#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
 4long double copysignl(long double x, long double y)
 5{
 6	return copysign(x, y);
 7}
 8#elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
 9long double copysignl(long double x, long double y)
10{
11	union ldshape ux = {x}, uy = {y};
12	ux.i.se &= 0x7fff;
13	ux.i.se |= uy.i.se & 0x8000;
14	return ux.f;
15}
16#endif