1/* IEEE754 floating point arithmetic
 2 * double precision: common utilities
 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 "ieee754dp.h"
28
29ieee754dp ieee754dp_logb(ieee754dp x)
30{
31	COMPXDP;
32
33	CLEARCX;
34
35	EXPLODEXDP;
36
37	switch (xc) {
38	case IEEE754_CLASS_SNAN:
39		return ieee754dp_nanxcpt(x, "logb", x);
40	case IEEE754_CLASS_QNAN:
41		return x;
42	case IEEE754_CLASS_INF:
43		return ieee754dp_inf(0);
44	case IEEE754_CLASS_ZERO:
45		return ieee754dp_inf(1);
46	case IEEE754_CLASS_DNORM:
47		DPDNORMX;
48		break;
49	case IEEE754_CLASS_NORM:
50		break;
51	}
52	return ieee754dp_fint(xe);
53}

 1/* IEEE754 floating point arithmetic
 2 * double precision: common utilities
 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 "ieee754dp.h"
28
29ieee754dp ieee754dp_logb(ieee754dp x)
30{
31	COMPXDP;
32
33	CLEARCX;
34
35	EXPLODEXDP;
36
37	switch (xc) {
38	case IEEE754_CLASS_SNAN:
39		return ieee754dp_nanxcpt(x, "logb", x);
40	case IEEE754_CLASS_QNAN:
41		return x;
42	case IEEE754_CLASS_INF:
43		return ieee754dp_inf(0);
44	case IEEE754_CLASS_ZERO:
45		return ieee754dp_inf(1);
46	case IEEE754_CLASS_DNORM:
47		DPDNORMX;
48		break;
49	case IEEE754_CLASS_NORM:
50		break;
51	}
52	return ieee754dp_fint(xe);
53}