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Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
180ae203 PM |
2 | .global __udivsi3 |
3 | .section .text..SHmedia32,"ax" | |
4 | .align 2 | |
5 | ||
6 | /* | |
7 | inputs: r4,r5 | |
8 | clobbered: r18,r19,r20,r21,r22,r25,tr0 | |
9 | result in r0. | |
10 | */ | |
11 | __udivsi3: | |
12 | addz.l r5,r63,r22 | |
13 | nsb r22,r0 | |
14 | shlld r22,r0,r25 | |
15 | shlri r25,48,r25 | |
16 | movi 0xffffffffffffbb0c,r20 /* shift count eqiv 76 */ | |
17 | sub r20,r25,r21 | |
18 | mmulfx.w r21,r21,r19 | |
19 | mshflo.w r21,r63,r21 | |
20 | ptabs r18,tr0 | |
21 | mmulfx.w r25,r19,r19 | |
22 | sub r20,r0,r0 | |
23 | /* bubble */ | |
24 | msub.w r21,r19,r19 | |
25 | ||
26 | /* | |
27 | * It would be nice for scheduling to do this add to r21 before | |
28 | * the msub.w, but we need a different value for r19 to keep | |
29 | * errors under control. | |
30 | */ | |
31 | addi r19,-2,r21 | |
32 | mulu.l r4,r21,r18 | |
33 | mmulfx.w r19,r19,r19 | |
34 | shlli r21,15,r21 | |
35 | shlrd r18,r0,r18 | |
36 | mulu.l r18,r22,r20 | |
37 | mmacnfx.wl r25,r19,r21 | |
38 | /* bubble */ | |
39 | sub r4,r20,r25 | |
40 | ||
41 | mulu.l r25,r21,r19 | |
42 | addi r0,14,r0 | |
43 | /* bubble */ | |
44 | shlrd r19,r0,r19 | |
45 | mulu.l r19,r22,r20 | |
46 | add r18,r19,r18 | |
47 | /* bubble */ | |
48 | sub.l r25,r20,r25 | |
49 | ||
50 | mulu.l r25,r21,r19 | |
51 | addz.l r25,r63,r25 | |
52 | sub r25,r22,r25 | |
53 | shlrd r19,r0,r19 | |
54 | mulu.l r19,r22,r20 | |
55 | addi r25,1,r25 | |
56 | add r18,r19,r18 | |
57 | ||
58 | cmpgt r25,r20,r25 | |
59 | add.l r18,r25,r0 | |
60 | blink tr0,r63 |