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gerrit-public.fairphone.software / kernel / msm-4.9 / 9c643eda003b4f8d68279ef34729ce884f88a886 / . / arch / sh / lib / udivsi3.S
blob: 72157ab5c314619942743574a80aa81f63e1130e [file] [log] [blame]
Paul Mundt1aad54a2008-11-18 17:33:48 +0900[diff] [blame]1/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
Takashi YOSHII3b041222008-12-08 11:33:06 +0900[diff] [blame]2 2004, 2005
Paul Mundt1aad54a2008-11-18 17:33:48 +0900[diff] [blame]3 Free Software Foundation, Inc.
4
5This file is free software; you can redistribute it and/or modify it
6under the terms of the GNU General Public License as published by the
7Free Software Foundation; either version 2, or (at your option) any
8later version.
9
10In addition to the permissions in the GNU General Public License, the
11Free Software Foundation gives you unlimited permission to link the
12compiled version of this file into combinations with other programs,
13and to distribute those combinations without any restriction coming
14from the use of this file. (The General Public License restrictions
15do apply in other respects; for example, they cover modification of
16the file, and distribution when not linked into a combine
17executable.)
18
19This file is distributed in the hope that it will be useful, but
20WITHOUT ANY WARRANTY; without even the implied warranty of
21MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22General Public License for more details.
23
24You should have received a copy of the GNU General Public License
25along with this program; see the file COPYING. If not, write to
26the Free Software Foundation, 51 Franklin Street, Fifth Floor,
27Boston, MA 02110-1301, USA. */
28
29!! libgcc routines for the Renesas / SuperH SH CPUs.
30!! Contributed by Steve Chamberlain.
31!! sac@cygnus.com
32
Paul Mundt1aad54a2008-11-18 17:33:48 +0900[diff] [blame]33 .balign 4
Paul Mundt1aad54a2008-11-18 17:33:48 +0900[diff] [blame]34 .global __udivsi3
Takashi YOSHII3b041222008-12-08 11:33:06 +0900[diff] [blame]35 .type __udivsi3, @function
36div8:
37 div1 r5,r4
38div7:
39 div1 r5,r4; div1 r5,r4; div1 r5,r4
40 div1 r5,r4; div1 r5,r4; div1 r5,r4; rts; div1 r5,r4
Paul Mundt1aad54a2008-11-18 17:33:48 +0900[diff] [blame]41
Takashi YOSHII3b041222008-12-08 11:33:06 +0900[diff] [blame]42divx4:
43 div1 r5,r4; rotcl r0
44 div1 r5,r4; rotcl r0
45 div1 r5,r4; rotcl r0
46 rts; div1 r5,r4
Paul Mundt1aad54a2008-11-18 17:33:48 +0900[diff] [blame]47
Takashi YOSHII3b041222008-12-08 11:33:06 +0900[diff] [blame]48__udivsi3:
49 sts.l pr,@-r15
Paul Mundt1aad54a2008-11-18 17:33:48 +0900[diff] [blame]50 extu.w r5,r0
Paul Mundt1aad54a2008-11-18 17:33:48 +0900[diff] [blame]51 cmp/eq r5,r0
Takashi YOSHII3b041222008-12-08 11:33:06 +0900[diff] [blame]52 bf/s large_divisor
Paul Mundt1aad54a2008-11-18 17:33:48 +0900[diff] [blame]53 div0u
Takashi YOSHII3b041222008-12-08 11:33:06 +0900[diff] [blame]54 swap.w r4,r0
55 shlr16 r4
56 bsr div8
Paul Mundt1aad54a2008-11-18 17:33:48 +0900[diff] [blame]57 shll16 r5
Takashi YOSHII3b041222008-12-08 11:33:06 +0900[diff] [blame]58 bsr div7
59 div1 r5,r4
60 xtrct r4,r0
61 xtrct r0,r4
62 bsr div8
63 swap.w r4,r4
64 bsr div7
65 div1 r5,r4
66 lds.l @r15+,pr
Paul Mundt1aad54a2008-11-18 17:33:48 +0900[diff] [blame]67 xtrct r4,r0
68 swap.w r0,r0
Takashi YOSHII3b041222008-12-08 11:33:06 +0900[diff] [blame]69 rotcl r0
70 rts
71 shlr16 r5
72
73large_divisor:
74 mov #0,r0
75 xtrct r4,r0
76 xtrct r0,r4
77 bsr divx4
78 rotcl r0
79 bsr divx4
80 rotcl r0
81 bsr divx4
82 rotcl r0
83 bsr divx4
84 rotcl r0
85 lds.l @r15+,pr
Paul Mundt1aad54a2008-11-18 17:33:48 +0900[diff] [blame]86 rts
87 rotcl r0