xref: /illumos-gate/usr/src/lib/libc/port/fp/floatdidf.c (revision 1da57d55)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include "quadint.h"

#pragma weak __floatdidf = ___floatdidf

/*
 * Convert a longlong_t to a double-precision floating point value.
 */
double
___floatdidf(longlong_t a)
{
	union uu aa;
	double d;

	aa.q = a;
	d = aa.sl[H];
	d *= (1 << HALF_BITS);
	d *= (1 << HALF_BITS);
	d += aa.ul[L];

	return (d);
}