Root/arch/arm/lib/lshrdi3.S

1/* Copyright 1995, 1996, 1998, 1999, 2000, 2003, 2004, 2005
2   Free Software Foundation, Inc.
3
4This file is free software; you can redistribute it and/or modify it
5under the terms of the GNU General Public License as published by the
6Free Software Foundation; either version 2, or (at your option) any
7later version.
8
9In addition to the permissions in the GNU General Public License, the
10Free Software Foundation gives you unlimited permission to link the
11compiled version of this file into combinations with other programs,
12and to distribute those combinations without any restriction coming
13from the use of this file. (The General Public License restrictions
14do apply in other respects; for example, they cover modification of
15the file, and distribution when not linked into a combine
16executable.)
17
18This file is distributed in the hope that it will be useful, but
19WITHOUT ANY WARRANTY; without even the implied warranty of
20MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21General Public License for more details.
22
23You should have received a copy of the GNU General Public License
24along with this program; see the file COPYING. If not, write to
25the Free Software Foundation, 51 Franklin Street, Fifth Floor,
26Boston, MA 02110-1301, USA. */
27
28
29#include <linux/linkage.h>
30
31#ifdef __ARMEB__
32#define al r1
33#define ah r0
34#else
35#define al r0
36#define ah r1
37#endif
38
39ENTRY(__lshrdi3)
40ENTRY(__aeabi_llsr)
41
42    subs r3, r2, #32
43    rsb ip, r2, #32
44    movmi al, al, lsr r2
45    movpl al, ah, lsr r3
46 ARM( orrmi al, al, ah, lsl ip )
47 THUMB( lslmi r3, ah, ip )
48 THUMB( orrmi al, al, r3 )
49    mov ah, ah, lsr r2
50    mov pc, lr
51
52ENDPROC(__lshrdi3)
53ENDPROC(__aeabi_llsr)
54

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