view usr/src/lib/libm/arm/_signbit.c @ 12:41256afcdc09

Add nexttoward to libm
author Andrew Stormont <andyjstormont@gmail.com>
date Wed, 29 Feb 2012 23:27:16 +0000
parents c9caec207d52
children
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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 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Copyright (c) 2006-2009 NEC Corporation
 */

#pragma ident	"@(#)signbit.c	1.18	06/01/31 SMI"

#pragma weak signbit = __signbit

/* long double must be treated as double. */
#pragma weak signbitl = __signbit
#pragma weak __signbitl = __signbit

#include "libm_macros.h"
int  __signbit( double d )
{
	union
	{
		double  s_d;
		unsigned int i_t[2];
	} work_t ;

	work_t.s_d = d	;
	return( work_t.i_t[HIWORD] >> 31 ) ;
}