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a5544970 | 1 | /* Copyright (C) 2009-2019 Free Software Foundation, Inc. |
1df34d4d MR |
2 | This file is part of GCC. |
3 | Contributed by Maciej W. Rozycki <macro@linux-mips.org>. | |
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 3, or (at your option) any | |
8 | later version. | |
9 | ||
10 | This file is distributed in the hope that it will be useful, but | |
11 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | General Public License for more details. | |
14 | ||
15 | Under Section 7 of GPL version 3, you are granted additional | |
16 | permissions described in the GCC Runtime Library Exception, version | |
17 | 3.1, as published by the Free Software Foundation. | |
18 | ||
19 | You should have received a copy of the GNU General Public License and | |
20 | a copy of the GCC Runtime Library Exception along with this program; | |
21 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
22 | <http://www.gnu.org/licenses/>. */ | |
23 | ||
24 | #ifdef L_udivsi3 | |
25 | .text | |
26 | .globl __udivsi3 | |
27 | .type __udivsi3, @function | |
28 | __udivsi3: | |
29 | .word 0 | |
30 | movl 8(%ap), %r1 | |
31 | blss 0f /* Check bit #31 of divisor. */ | |
32 | movl 4(%ap), %r2 | |
33 | blss 1f /* Check bit #31 of dividend. */ | |
34 | ||
35 | /* Both zero, do a standard division. */ | |
36 | ||
37 | divl3 %r1, %r2, %r0 | |
38 | ret | |
39 | ||
40 | /* MSB of divisor set, only 1 or 0 may result. */ | |
41 | 0: | |
42 | decl %r1 | |
43 | clrl %r0 | |
44 | cmpl %r1, 4(%ap) | |
45 | adwc $0, %r0 | |
46 | ret | |
47 | ||
48 | /* MSB of dividend set, do an extended division. */ | |
49 | 1: | |
50 | clrl %r3 | |
51 | ediv %r1, %r2, %r0, %r3 | |
52 | ret | |
53 | .size __udivsi3, . - __udivsi3 | |
54 | .previous | |
55 | #endif | |
56 | ||
57 | #ifdef L_umodsi3 | |
58 | .text | |
59 | .globl __umodsi3 | |
60 | .type __umodsi3, @function | |
61 | __umodsi3: | |
62 | .word 0 | |
63 | movl 8(%ap), %r1 | |
64 | blss 0f /* Check bit #31 of divisor. */ | |
65 | movl 4(%ap), %r2 | |
66 | blss 1f /* Check bit #31 of dividend. */ | |
67 | ||
68 | /* Both zero, do a standard division. */ | |
69 | ||
70 | divl3 %r1, %r2, %r0 | |
71 | mull2 %r0, %r1 | |
72 | subl3 %r1, %r2, %r0 | |
73 | ret | |
74 | ||
75 | /* MSB of divisor set, subtract the divisor at most once. */ | |
76 | 0: | |
77 | movl 4(%ap), %r2 | |
78 | clrl %r0 | |
79 | cmpl %r2, %r1 | |
80 | sbwc $0, %r0 | |
81 | bicl2 %r0, %r1 | |
82 | subl3 %r1, %r2, %r0 | |
83 | ret | |
84 | ||
85 | /* MSB of dividend set, do an extended division. */ | |
86 | 1: | |
87 | clrl %r3 | |
88 | ediv %r1, %r2, %r3, %r0 | |
89 | ret | |
90 | .size __umodsi3, . - __umodsi3 | |
91 | .previous | |
92 | #endif |