isnanl.c revision 25c28e83beb90e7c80452a7c818c5e6f73a07dc8
125c28e8Piotr Jasiukajtis/*
225c28e8Piotr Jasiukajtis * CDDL HEADER START
325c28e8Piotr Jasiukajtis *
425c28e8Piotr Jasiukajtis * The contents of this file are subject to the terms of the
525c28e8Piotr Jasiukajtis * Common Development and Distribution License (the "License").
625c28e8Piotr Jasiukajtis * You may not use this file except in compliance with the License.
725c28e8Piotr Jasiukajtis *
825c28e8Piotr Jasiukajtis * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
925c28e8Piotr Jasiukajtis * or http://www.opensolaris.org/os/licensing.
1025c28e8Piotr Jasiukajtis * See the License for the specific language governing permissions
1125c28e8Piotr Jasiukajtis * and limitations under the License.
1225c28e8Piotr Jasiukajtis *
1325c28e8Piotr Jasiukajtis * When distributing Covered Code, include this CDDL HEADER in each
1425c28e8Piotr Jasiukajtis * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
1525c28e8Piotr Jasiukajtis * If applicable, add the following below this CDDL HEADER, with the
1625c28e8Piotr Jasiukajtis * fields enclosed by brackets "[]" replaced with your own identifying
1725c28e8Piotr Jasiukajtis * information: Portions Copyright [yyyy] [name of copyright owner]
1825c28e8Piotr Jasiukajtis *
1925c28e8Piotr Jasiukajtis * CDDL HEADER END
2025c28e8Piotr Jasiukajtis */
2125c28e8Piotr Jasiukajtis
2225c28e8Piotr Jasiukajtis/*
2325c28e8Piotr Jasiukajtis * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
2425c28e8Piotr Jasiukajtis */
2525c28e8Piotr Jasiukajtis/*
2625c28e8Piotr Jasiukajtis * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
2725c28e8Piotr Jasiukajtis * Use is subject to license terms.
2825c28e8Piotr Jasiukajtis */
2925c28e8Piotr Jasiukajtis
3025c28e8Piotr Jasiukajtis#if defined(ELFOBJ)
3125c28e8Piotr Jasiukajtis#pragma weak isnanl = __isnanl
3225c28e8Piotr Jasiukajtis#endif
3325c28e8Piotr Jasiukajtis
3425c28e8Piotr Jasiukajtis#include "libm.h"
3525c28e8Piotr Jasiukajtis
3625c28e8Piotr Jasiukajtis#if defined(__sparc)
3725c28e8Piotr Jasiukajtisint
3825c28e8Piotr Jasiukajtisisnanl(long double x) {
3925c28e8Piotr Jasiukajtis	int *px = (int *) &x;
4025c28e8Piotr Jasiukajtis	return ((px[0] & ~0x80000000) >= 0x7fff0000 &&
4125c28e8Piotr Jasiukajtis		((px[0] & ~0xffff0000) | px[1] | px[2] | px[3]) != 0);
4225c28e8Piotr Jasiukajtis}
4325c28e8Piotr Jasiukajtis#elif defined(__x86)
4425c28e8Piotr Jasiukajtisint
4525c28e8Piotr Jasiukajtisisnanl(long double x) {
4625c28e8Piotr Jasiukajtis	int *px = (int *) &x, t = px[2] & 0x7fff;
4725c28e8Piotr Jasiukajtis#if defined(HANDLE_UNSUPPORTED)
4825c28e8Piotr Jasiukajtis	return ((t == 0x7fff && ((px[1] & ~0x80000000) | px[0]) != 0) ||
4925c28e8Piotr Jasiukajtis		(t != 0 && (px[1] & 0x80000000) == 0));
5025c28e8Piotr Jasiukajtis#else
5125c28e8Piotr Jasiukajtis	return (t == 0x7fff && ((px[1] & ~0x80000000) | px[0]) != 0);
5225c28e8Piotr Jasiukajtis#endif
5325c28e8Piotr Jasiukajtis}
5425c28e8Piotr Jasiukajtis#endif	/* defined(__sparc) || defined(__x86) */
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