4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
23 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
26 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
27 * Use is subject to license terms.
30 #pragma weak __ldexp = ldexp
36 ldexp(double x
, int n
) {
37 int *px
= (int *) &x
, ix
= px
[HIWORD
] & ~0x80000000;
39 if (ix
>= 0x7ff00000 || (px
[LOWORD
] | ix
) == 0)
40 #if defined(FPADD_TRAPS_INCOMPLETE_ON_NAN)
41 return (ix
>= 0x7ff80000 ? x
: x
+ x
);
42 /* assumes sparc-like QNaN */
47 ix
= px
[HIWORD
] & ~0x80000000;
49 * SVID3 requires both overflow and underflow cases to set errno
50 * XPG3/XPG4/XPG4.2/SUSv2 requires overflow to set errno
52 if (ix
>= 0x7ff00000 || (px
[LOWORD
] | ix
) == 0)