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 * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
2325c28e8Piotr Jasiukajtis */
2425c28e8Piotr Jasiukajtis/*
2525c28e8Piotr Jasiukajtis * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
2625c28e8Piotr Jasiukajtis * Use is subject to license terms.
2725c28e8Piotr Jasiukajtis */
2825c28e8Piotr Jasiukajtis
2925c28e8Piotr Jasiukajtis        .file "isnanl.s"
3025c28e8Piotr Jasiukajtis
3125c28e8Piotr Jasiukajtis#include "libm.h"
3225c28e8Piotr JasiukajtisLIBM_ANSI_PRAGMA_WEAK(isnanl,function)
3325c28e8Piotr Jasiukajtis
3425c28e8Piotr Jasiukajtis	ENTRY(isnanl)
3525c28e8Piotr Jasiukajtis	movl    12(%esp),%eax		/ ax <-- sign bit and exp
3625c28e8Piotr Jasiukajtis	andl    $0x00007fff,%eax
3725c28e8Piotr Jasiukajtis	jz	.not_nan		/ jump if exp is all 0
3825c28e8Piotr Jasiukajtis	xorl    $0x00007fff,%eax
3925c28e8Piotr Jasiukajtis	jz	.nan_or_inf		/ jump if exp is all 1
4025c28e8Piotr Jasiukajtis	testl   $0x80000000,8(%esp)
4125c28e8Piotr Jasiukajtis	jz	.got_nan		/ jump if leading bit is 0
4225c28e8Piotr Jasiukajtis	movl	$0,%eax
4325c28e8Piotr Jasiukajtis.not_nan:
4425c28e8Piotr Jasiukajtis	ret
4525c28e8Piotr Jasiukajtis.nan_or_inf:				/ note that %eax = 0 from before
4625c28e8Piotr Jasiukajtis	cmpl    $0x80000000,8(%esp)     / what is first half of significand?
4725c28e8Piotr Jasiukajtis	jnz	.got_nan		/ jump if not equal to 0x80000000
4825c28e8Piotr Jasiukajtis	testl	$0xffffffff,4(%esp)	/ is second half of significand 0?
4925c28e8Piotr Jasiukajtis	jnz	.got_nan		/ jump if not equal to 0
5025c28e8Piotr Jasiukajtis	ret
5125c28e8Piotr Jasiukajtis.got_nan:
5225c28e8Piotr Jasiukajtis	movl	$1,%eax
5325c28e8Piotr Jasiukajtis	ret
5425c28e8Piotr Jasiukajtis	.align	4
5525c28e8Piotr Jasiukajtis	SET_SIZE(isnanl)