57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/*
|
|
* Copyright (c) 1994, 1995 Carnegie-Mellon University.
|
|
* All rights reserved.
|
|
*
|
|
* Author: Chris G. Demetriou
|
|
*
|
|
* Permission to use, copy, modify and distribute this software and
|
|
* its documentation is hereby granted, provided that both the copyright
|
|
* notice and this permission notice appear in all copies of the
|
|
* software, derivative works or modified versions, and any portions
|
|
* thereof, and that both notices appear in supporting documentation.
|
|
*
|
|
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
|
|
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
|
|
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
|
|
*
|
|
* Carnegie Mellon requests users of this software to return to
|
|
*
|
|
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
|
|
* School of Computer Science
|
|
* Carnegie Mellon University
|
|
* Pittsburgh PA 15213-3890
|
|
*
|
|
* any improvements or extensions that they make and grant Carnegie the
|
|
* rights to redistribute these changes.
|
|
*
|
|
* from: NetBSD: isinf.c,v 1.1 1995/02/10 17:50:23 cgd Exp
|
|
* from: FreeBSD: src/lib/libc/alpha/gen/isinf.c,v 1.2 2000/05/10
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/types.h>
|
|
#include <machine/ieee.h>
|
|
#include <math.h>
|
|
|
|
int
|
|
isnan(d)
|
|
double d;
|
|
{
|
|
register struct ieee_double *p = (struct ieee_double *)&d;
|
|
|
|
return (p->dbl_exp == DBL_EXP_INFNAN &&
|
|
(p->dbl_frach || p->dbl_fracl));
|
|
}
|
|
|
|
int
|
|
isinf(d)
|
|
double d;
|
|
{
|
|
register struct ieee_double *p = (struct ieee_double *)&d;
|
|
|
|
return (p->dbl_exp == DBL_EXP_INFNAN &&
|
|
!p->dbl_frach && !p->dbl_fracl);
|
|
}
|