1 /* $NetBSD: lshldi3.c,v 1.4 2012/12/07 15:41:02 christos Exp $ */
2
3 /*-
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This software was developed by the Computer Systems Engineering group
8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9 * contributed to Berkeley.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include <sys/cdefs.h>
37 #if defined(LIBC_SCCS) && !defined(lint)
38 #if 0
39 static char sccsid[] = "@(#)lshldi3.c 8.1 (Berkeley) 6/4/93";
40 #else
41 __RCSID("$NetBSD: lshldi3.c,v 1.4 2012/12/07 15:41:02 christos Exp $");
42 #endif
43 #endif /* LIBC_SCCS and not lint */
44
45 #include "quad.h"
46
ARM_EABI_ALIAS(__aeabi_llsl,__lshldi3)47 ARM_EABI_ALIAS(__aeabi_llsl, __lshldi3) /* no semicolon */
48
49 /*
50 * Shift an (unsigned) quad value left (logical shift left).
51 * This is the same as arithmetic shift left!
52 */
53 quad_t
54 __lshldi3(quad_t a, qshift_t shift)
55 {
56 union uu aa;
57
58 if (shift == 0)
59 return(a);
60 aa.q = a;
61 if (shift >= INT_BITS) {
62 aa.ul[H] = aa.ul[L] << (unsigned int)(shift - INT_BITS);
63 aa.ul[L] = 0;
64 } else {
65 aa.ul[H] = (aa.ul[H] << shift) |
66 (aa.ul[L] >> (INT_BITS - shift));
67 aa.ul[L] <<= shift;
68 }
69 return (aa.q);
70 }
71