OpenSolaris_b135/lib/libbc/libc/crt/sparc/_ftou.c

/*
 * 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
 */
#pragma ident	"%Z%%M%	%I%	%E% SMI" 

/*
 * Copyright (c) 1987 by Sun Microsystems, Inc.
 */

unsigned 
_dtou(d)
	double          d;
{
	/* Convert double to unsigned.     */

	int             id;

	/*
	 * id = d is correct if 0 <= d < 2**31, and good enough if d is NaN
	 * or d < 0 or d >= 2**32.  Otherwise, since the result (int) d of
	 * converting 2**31 <= d < 2**32 is unknown, adjust d before the
	 * conversion. 
	 */

	if (d >= 2147483648.0)
		id = 0x80000000 | (int) (d - 2147483648.0);
	else
		id = (int) d;
	return (unsigned) id;
}

unsigned 
_ftou(dd)
	int          dd;		/* really float */
{
	/* Convert float to unsigned.     */

	int             id;
	double		d = (double) *((float *)(&dd));
	/*
	 * id = d is correct if 0 <= d < 2**31, and good enough if d is NaN
	 * or d < 0 or d >= 2**32.  Otherwise, since the result (int) d of
	 * converting 2**31 <= d < 2**32 is unknown, adjust d before the
	 * conversion. 
	 */

	if (d >= 2147483648.0)
		id = 0x80000000 | (int) (d - 2147483648.0);
	else
		id = (int) d;
	return (unsigned) id;
}