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1 | # _ashrsi3.S for Lattice Mico32 | |
2 | # Contributed by Jon Beniston <jon@beniston.com> and Richard Henderson. | |
3 | # | |
4 | # Copyright (C) 2009-2020 Free Software Foundation, Inc. | |
5 | # | |
6 | # This file is free software; you can redistribute it and/or modify it | |
7 | # under the terms of the GNU General Public License as published by the | |
8 | # Free Software Foundation; either version 3, or (at your option) any | |
9 | # later version. | |
10 | # | |
11 | # This file is distributed in the hope that it will be useful, but | |
12 | # WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | # General Public License for more details. | |
15 | # | |
16 | # Under Section 7 of GPL version 3, you are granted additional | |
17 | # permissions described in the GCC Runtime Library Exception, version | |
18 | # 3.1, as published by the Free Software Foundation. | |
19 | # | |
20 | # You should have received a copy of the GNU General Public License and | |
21 | # a copy of the GCC Runtime Library Exception along with this program; | |
22 | # see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | # <http://www.gnu.org/licenses/>. | |
24 | # | |
25 | ||
26 | /* Arithmetic right shift. */ | |
27 | ||
28 | .global __ashrsi3 | |
29 | .type __ashrsi3,@function | |
30 | ||
31 | __ashrsi3: | |
32 | /* Only use 5 LSBs, as that's all the h/w shifter uses. */ | |
33 | andi r2, r2, 0x1f | |
34 | /* Get address of offset into unrolled shift loop to jump to. */ | |
35 | #ifdef __PIC__ | |
36 | lw r3, (gp+got(__ashrsi3_0)) | |
37 | #else | |
38 | mvhi r3, hi(__ashrsi3_0) | |
39 | ori r3, r3, lo(__ashrsi3_0) | |
40 | #endif | |
41 | add r2, r2, r2 | |
42 | add r2, r2, r2 | |
43 | sub r3, r3, r2 | |
44 | b r3 | |
45 | ||
46 | __ashrsi3_31: | |
47 | sri r1, r1, 1 | |
48 | __ashrsi3_30: | |
49 | sri r1, r1, 1 | |
50 | __ashrsi3_29: | |
51 | sri r1, r1, 1 | |
52 | __ashrsi3_28: | |
53 | sri r1, r1, 1 | |
54 | __ashrsi3_27: | |
55 | sri r1, r1, 1 | |
56 | __ashrsi3_26: | |
57 | sri r1, r1, 1 | |
58 | __ashrsi3_25: | |
59 | sri r1, r1, 1 | |
60 | __ashrsi3_24: | |
61 | sri r1, r1, 1 | |
62 | __ashrsi3_23: | |
63 | sri r1, r1, 1 | |
64 | __ashrsi3_22: | |
65 | sri r1, r1, 1 | |
66 | __ashrsi3_21: | |
67 | sri r1, r1, 1 | |
68 | __ashrsi3_20: | |
69 | sri r1, r1, 1 | |
70 | __ashrsi3_19: | |
71 | sri r1, r1, 1 | |
72 | __ashrsi3_18: | |
73 | sri r1, r1, 1 | |
74 | __ashrsi3_17: | |
75 | sri r1, r1, 1 | |
76 | __ashrsi3_16: | |
77 | sri r1, r1, 1 | |
78 | __ashrsi3_15: | |
79 | sri r1, r1, 1 | |
80 | __ashrsi3_14: | |
81 | sri r1, r1, 1 | |
82 | __ashrsi3_13: | |
83 | sri r1, r1, 1 | |
84 | __ashrsi3_12: | |
85 | sri r1, r1, 1 | |
86 | __ashrsi3_11: | |
87 | sri r1, r1, 1 | |
88 | __ashrsi3_10: | |
89 | sri r1, r1, 1 | |
90 | __ashrsi3_9: | |
91 | sri r1, r1, 1 | |
92 | __ashrsi3_8: | |
93 | sri r1, r1, 1 | |
94 | __ashrsi3_7: | |
95 | sri r1, r1, 1 | |
96 | __ashrsi3_6: | |
97 | sri r1, r1, 1 | |
98 | __ashrsi3_5: | |
99 | sri r1, r1, 1 | |
100 | __ashrsi3_4: | |
101 | sri r1, r1, 1 | |
102 | __ashrsi3_3: | |
103 | sri r1, r1, 1 | |
104 | __ashrsi3_2: | |
105 | sri r1, r1, 1 | |
106 | __ashrsi3_1: | |
107 | sri r1, r1, 1 | |
108 | __ashrsi3_0: | |
109 | ret | |
110 |