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Diffstat (limited to 'arch/sh/lib/udivsi3.S')
-rw-r--r-- | arch/sh/lib/udivsi3.S | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/arch/sh/lib/udivsi3.S b/arch/sh/lib/udivsi3.S new file mode 100644 index 000000000000..72157ab5c314 --- /dev/null +++ b/arch/sh/lib/udivsi3.S | |||
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1 | /* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003, | ||
2 | 2004, 2005 | ||
3 | Free Software Foundation, Inc. | ||
4 | |||
5 | This file is free software; you can redistribute it and/or modify it | ||
6 | under the terms of the GNU General Public License as published by the | ||
7 | Free Software Foundation; either version 2, or (at your option) any | ||
8 | later version. | ||
9 | |||
10 | In addition to the permissions in the GNU General Public License, the | ||
11 | Free Software Foundation gives you unlimited permission to link the | ||
12 | compiled version of this file into combinations with other programs, | ||
13 | and to distribute those combinations without any restriction coming | ||
14 | from the use of this file. (The General Public License restrictions | ||
15 | do apply in other respects; for example, they cover modification of | ||
16 | the file, and distribution when not linked into a combine | ||
17 | executable.) | ||
18 | |||
19 | This file is distributed in the hope that it will be useful, but | ||
20 | WITHOUT ANY WARRANTY; without even the implied warranty of | ||
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
22 | General Public License for more details. | ||
23 | |||
24 | You should have received a copy of the GNU General Public License | ||
25 | along with this program; see the file COPYING. If not, write to | ||
26 | the Free Software Foundation, 51 Franklin Street, Fifth Floor, | ||
27 | Boston, MA 02110-1301, USA. */ | ||
28 | |||
29 | !! libgcc routines for the Renesas / SuperH SH CPUs. | ||
30 | !! Contributed by Steve Chamberlain. | ||
31 | !! sac@cygnus.com | ||
32 | |||
33 | .balign 4 | ||
34 | .global __udivsi3 | ||
35 | .type __udivsi3, @function | ||
36 | div8: | ||
37 | div1 r5,r4 | ||
38 | div7: | ||
39 | div1 r5,r4; div1 r5,r4; div1 r5,r4 | ||
40 | div1 r5,r4; div1 r5,r4; div1 r5,r4; rts; div1 r5,r4 | ||
41 | |||
42 | divx4: | ||
43 | div1 r5,r4; rotcl r0 | ||
44 | div1 r5,r4; rotcl r0 | ||
45 | div1 r5,r4; rotcl r0 | ||
46 | rts; div1 r5,r4 | ||
47 | |||
48 | __udivsi3: | ||
49 | sts.l pr,@-r15 | ||
50 | extu.w r5,r0 | ||
51 | cmp/eq r5,r0 | ||
52 | bf/s large_divisor | ||
53 | div0u | ||
54 | swap.w r4,r0 | ||
55 | shlr16 r4 | ||
56 | bsr div8 | ||
57 | shll16 r5 | ||
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 | ||
67 | xtrct r4,r0 | ||
68 | swap.w r0,r0 | ||
69 | rotcl r0 | ||
70 | rts | ||
71 | shlr16 r5 | ||
72 | |||
73 | large_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 | ||
86 | rts | ||
87 | rotcl r0 | ||