1*2fe8fb19SBen Gras /* $NetBSD: ldexp_881.c,v 1.3 2008/04/28 20:22:56 martin Exp $ */
2*2fe8fb19SBen Gras
3*2fe8fb19SBen Gras /*-
4*2fe8fb19SBen Gras * Copyright (c) 1998 The NetBSD Foundation, Inc.
5*2fe8fb19SBen Gras * All rights reserved.
6*2fe8fb19SBen Gras *
7*2fe8fb19SBen Gras * This code is derived from software contributed to The NetBSD Foundation
8*2fe8fb19SBen Gras * by Charles M. Hannum.
9*2fe8fb19SBen Gras *
10*2fe8fb19SBen Gras * Redistribution and use in source and binary forms, with or without
11*2fe8fb19SBen Gras * modification, are permitted provided that the following conditions
12*2fe8fb19SBen Gras * are met:
13*2fe8fb19SBen Gras * 1. Redistributions of source code must retain the above copyright
14*2fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer.
15*2fe8fb19SBen Gras * 2. Redistributions in binary form must reproduce the above copyright
16*2fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer in the
17*2fe8fb19SBen Gras * documentation and/or other materials provided with the distribution.
18*2fe8fb19SBen Gras *
19*2fe8fb19SBen Gras * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20*2fe8fb19SBen Gras * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21*2fe8fb19SBen Gras * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22*2fe8fb19SBen Gras * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23*2fe8fb19SBen Gras * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24*2fe8fb19SBen Gras * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25*2fe8fb19SBen Gras * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26*2fe8fb19SBen Gras * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27*2fe8fb19SBen Gras * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28*2fe8fb19SBen Gras * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29*2fe8fb19SBen Gras * POSSIBILITY OF SUCH DAMAGE.
30*2fe8fb19SBen Gras */
31*2fe8fb19SBen Gras
32*2fe8fb19SBen Gras #include <sys/cdefs.h>
33*2fe8fb19SBen Gras #if defined(LIBC_SCCS) && !defined(lint)
34*2fe8fb19SBen Gras __RCSID("$NetBSD: ldexp_881.c,v 1.3 2008/04/28 20:22:56 martin Exp $");
35*2fe8fb19SBen Gras #endif /* LIBC_SCCS and not lint */
36*2fe8fb19SBen Gras
37*2fe8fb19SBen Gras #include <sys/types.h>
38*2fe8fb19SBen Gras #include <machine/ieee.h>
39*2fe8fb19SBen Gras #include <math.h>
40*2fe8fb19SBen Gras
41*2fe8fb19SBen Gras /*
42*2fe8fb19SBen Gras * ldexp(value, exp): return value * (2 ** exp).
43*2fe8fb19SBen Gras */
44*2fe8fb19SBen Gras double
ldexp(value,exp2)45*2fe8fb19SBen Gras ldexp(value, exp2)
46*2fe8fb19SBen Gras double value;
47*2fe8fb19SBen Gras int exp2;
48*2fe8fb19SBen Gras {
49*2fe8fb19SBen Gras double temp;
50*2fe8fb19SBen Gras
51*2fe8fb19SBen Gras __asm ("fscalel %2,%1"
52*2fe8fb19SBen Gras : "=f" (temp)
53*2fe8fb19SBen Gras : "0" (value), "g" (exp2));
54*2fe8fb19SBen Gras return (temp);
55*2fe8fb19SBen Gras }
56