45 lines
1.0 KiB
C
45 lines
1.0 KiB
C
/* s_isnanl.c -- long double version of s_isnan.c.
|
|
* Conversion to long double by Ulrich Drepper,
|
|
* Cygnus Support, drepper@cygnus.com.
|
|
*/
|
|
|
|
/*
|
|
* ====================================================
|
|
* 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"
|
|
|
|
#ifdef __STDC__
|
|
int __isnanl(long double x)
|
|
#else
|
|
int __isnanl(x)
|
|
long double x;
|
|
#endif
|
|
{
|
|
int32_t se,hx,lx;
|
|
GET_LDOUBLE_WORDS(se,hx,lx,x);
|
|
se = (se & 0x7fff) << 1;
|
|
hx |= lx;
|
|
se |= (u_int32_t)(hx|(-hx))>>31;
|
|
se = 0xfffe - se;
|
|
return (int)((u_int32_t)(se))>>16;
|
|
}
|
|
weak_alias (__isnanl, isnanl)
|