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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#if defined(ELFOBJ)
#pragma weak isnanl = __isnanl
#endif
#include "libm.h"
#if defined(__sparc)
int
isnanl(long double x) {
int *px = (int *) &x;
return ((px[0] & ~0x80000000) >= 0x7fff0000 &&
((px[0] & ~0xffff0000) | px[1] | px[2] | px[3]) != 0);
}
#elif defined(__x86)
int
isnanl(long double x) {
int *px = (int *) &x, t = px[2] & 0x7fff;
#if defined(HANDLE_UNSUPPORTED)
return (t == 0x7fff && ((px[1] & ~0x80000000) | px[0]) != 0 ||
t != 0 && (px[1] & 0x80000000) == 0);
#else
return (t == 0x7fff && ((px[1] & ~0x80000000) | px[0]) != 0);
#endif
}
#endif /* defined(__sparc) || defined(__x86) */
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