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_scalb(ieee754dp x, int n)
30{
31	COMPXDP;
32
33	CLEARCX;
34
35	EXPLODEXDP;
36
37	switch (xc) {
38	case IEEE754_CLASS_SNAN:
39		return ieee754dp_nanxcpt(x, "scalb", x, n);
40	case IEEE754_CLASS_QNAN:
41	case IEEE754_CLASS_INF:
42	case IEEE754_CLASS_ZERO:
43		return x;
44	case IEEE754_CLASS_DNORM:
45		DPDNORMX;
46		break;
47	case IEEE754_CLASS_NORM:
48		break;
49	}
50	DPNORMRET2(xs, xe + n, xm << 3, "scalb", x, n);
51}
52
53
54ieee754dp ieee754dp_ldexp(ieee754dp x, int n)
55{
56	return ieee754dp_scalb(x, n);
57}