|
Packit |
6c4009 |
/* s_isnanl.c -- long double version for i387 of s_isnan.c.
|
|
Packit |
6c4009 |
* Conversion to long double by Ulrich Drepper,
|
|
Packit |
6c4009 |
* Cygnus Support, drepper@cygnus.com.
|
|
Packit |
6c4009 |
*/
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/*
|
|
Packit |
6c4009 |
* ====================================================
|
|
Packit |
6c4009 |
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
|
Packit |
6c4009 |
*
|
|
Packit |
6c4009 |
* Developed at SunPro, a Sun Microsystems, Inc. business.
|
|
Packit |
6c4009 |
* Permission to use, copy, modify, and distribute this
|
|
Packit |
6c4009 |
* software is freely granted, provided that this notice
|
|
Packit |
6c4009 |
* is preserved.
|
|
Packit |
6c4009 |
* ====================================================
|
|
Packit |
6c4009 |
*/
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#if defined(LIBM_SCCS) && !defined(lint)
|
|
Packit |
6c4009 |
static char rcsid[] = "$NetBSD: $";
|
|
Packit |
6c4009 |
#endif
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/*
|
|
Packit |
6c4009 |
* isnanl(x) returns 1 is x is nan, else 0;
|
|
Packit |
6c4009 |
* no branching!
|
|
Packit |
6c4009 |
*/
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#include <math.h>
|
|
Packit |
6c4009 |
#include <math_private.h>
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
int __isnanl(long double x)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
int32_t se,hx,lx;
|
|
Packit |
6c4009 |
GET_LDOUBLE_WORDS(se,hx,lx,x);
|
|
Packit |
6c4009 |
se = (se & 0x7fff) << 1;
|
|
Packit |
6c4009 |
/* The additional & 0x7fffffff is required because Intel's
|
|
Packit |
6c4009 |
extended format has the normally implicit 1 explicit
|
|
Packit |
6c4009 |
present. Sigh! */
|
|
Packit |
6c4009 |
lx |= hx & 0x7fffffff;
|
|
Packit |
6c4009 |
se |= (uint32_t)(lx|(-lx))>>31;
|
|
Packit |
6c4009 |
se = 0xfffe - se;
|
|
Packit |
6c4009 |
return (int)((uint32_t)(se))>>16;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
hidden_def (__isnanl)
|
|
Packit |
6c4009 |
weak_alias (__isnanl, isnanl)
|