1/* IEEE754 floating point arithmetic
 2 * single precision
 3 */
 4/*
 5 * MIPS floating point support
 6 * Copyright (C) 1994-2000 Algorithmics Ltd.
 7 *
 8 * ########################################################################
 9 *
10 *  This program is free software; you can distribute it and/or modify it
11 *  under the terms of the GNU General Public License (Version 2) as
12 *  published by the Free Software Foundation.
13 *
14 *  This program is distributed in the hope it will be useful, but WITHOUT
15 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
17 *  for more details.
18 *
19 *  You should have received a copy of the GNU General Public License along
20 *  with this program; if not, write to the Free Software Foundation, Inc.,
21 *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
22 *
23 * ########################################################################
24 */
25
26
27#include "ieee754sp.h"
28
29/* close to ieeep754sp_logb
30*/
31ieee754sp ieee754sp_frexp(ieee754sp x, int *eptr)
32{
33	COMPXSP;
34	CLEARCX;
35	EXPLODEXSP;
36
37	switch (xc) {
38	case IEEE754_CLASS_SNAN:
39	case IEEE754_CLASS_QNAN:
40	case IEEE754_CLASS_INF:
41	case IEEE754_CLASS_ZERO:
42		*eptr = 0;
43		return x;
44	case IEEE754_CLASS_DNORM:
45		SPDNORMX;
46		break;
47	case IEEE754_CLASS_NORM:
48		break;
49	}
50	*eptr = xe + 1;
51	return buildsp(xs, -1 + SP_EBIAS, xm & ~SP_HIDDEN_BIT);
52}