mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-21 01:12:26 +08:00
39 lines
963 B
C
39 lines
963 B
C
/* s_isnanl.c -- long double version of s_isnan.c.
|
|
* Conversion to long double by Jakub Jelinek, jj@ultra.linux.cz.
|
|
*/
|
|
|
|
/*
|
|
* ====================================================
|
|
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
|
*
|
|
* Developed at SunPro, a Sun Microsystems, Inc. business.
|
|
* Permission to use, copy, modify, and distribute this
|
|
* software is freely granted, provided that this notice
|
|
* is preserved.
|
|
* ====================================================
|
|
*/
|
|
|
|
#if defined(LIBM_SCCS) && !defined(lint)
|
|
static char rcsid[] = "$NetBSD: $";
|
|
#endif
|
|
|
|
/*
|
|
* isnanl(x) returns 1 is x is nan, else 0;
|
|
* no branching!
|
|
*/
|
|
|
|
#include <math.h>
|
|
#include <math_private.h>
|
|
|
|
int __isnanl(long double x)
|
|
{
|
|
int64_t hx,lx;
|
|
GET_LDOUBLE_WORDS64(hx,lx,x);
|
|
hx &= 0x7fffffffffffffffLL;
|
|
hx |= (u_int64_t)(lx|(-lx))>>63;
|
|
hx = 0x7fff000000000000LL - hx;
|
|
return (int)((u_int64_t)hx>>63);
|
|
}
|
|
hidden_def (__isnanl)
|
|
weak_alias (__isnanl, isnanl)
|