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1// SPDX-License-Identifier: GPL-2.0-or-later OR Apache-2.0
2/*
3 * Test cases for __ashldi3(), __ashrdi3(), and __lshrdi3().
4 */
5
6#include <linux/array_size.h>
7#include <linux/module.h>
8#include <linux/libgcc.h>
9#include <kunit/test.h>
10
11struct shdi3_test_entry {
12 long long input;
13 int shift;
14 long long result;
15};
16
17static const struct shdi3_test_entry ashldi3_testdata[] = {
18 /* https://github.com/llvm/llvm-project/compiler-rt/test/builtins/Unit/ashldi3_test.c */
19 { 0x0123456789ABCDEFLL, 0, 0x123456789ABCDEFLL },
20 { 0x0123456789ABCDEFLL, 1, 0x2468ACF13579BDELL },
21 { 0x0123456789ABCDEFLL, 2, 0x48D159E26AF37BCLL },
22 { 0x0123456789ABCDEFLL, 3, 0x91A2B3C4D5E6F78LL },
23 { 0x0123456789ABCDEFLL, 4, 0x123456789ABCDEF0LL },
24 { 0x0123456789ABCDEFLL, 28, 0x789ABCDEF0000000LL },
25 { 0x0123456789ABCDEFLL, 29, 0xF13579BDE0000000LL },
26 { 0x0123456789ABCDEFLL, 30, 0xE26AF37BC0000000LL },
27 { 0x0123456789ABCDEFLL, 31, 0xC4D5E6F780000000LL },
28 { 0x0123456789ABCDEFLL, 32, 0x89ABCDEF00000000LL },
29 { 0x0123456789ABCDEFLL, 33, 0x13579BDE00000000LL },
30 { 0x0123456789ABCDEFLL, 34, 0x26AF37BC00000000LL },
31 { 0x0123456789ABCDEFLL, 35, 0x4D5E6F7800000000LL },
32 { 0x0123456789ABCDEFLL, 36, 0x9ABCDEF000000000LL },
33 { 0x0123456789ABCDEFLL, 60, 0xF000000000000000LL },
34 { 0x0123456789ABCDEFLL, 61, 0xE000000000000000LL },
35 { 0x0123456789ABCDEFLL, 62, 0xC000000000000000LL },
36 { 0x0123456789ABCDEFLL, 63, 0x8000000000000000LL },
37};
38
39static void shdi3_test_ashldi3(struct kunit *test)
40{
41 const struct shdi3_test_entry *e;
42 long long ret;
43
44 for (e = ashldi3_testdata;
45 e < ashldi3_testdata + ARRAY_SIZE(ashldi3_testdata); e++) {
46 ret = __ashldi3(e->input, e->shift);
47 KUNIT_EXPECT_EQ_MSG(test, ret, e->result,
48 " when evaluating __ashldi3(%lld, %d)",
49 e->input, e->shift);
50 }
51}
52
53static const struct shdi3_test_entry ashrdi3_testdata[] = {
54 /* https://github.com/llvm/llvm-project/compiler-rt/test/builtins/Unit/ashrdi3_test.c */
55 { 0x0123456789ABCDEFLL, 0, 0x123456789ABCDEFLL },
56 { 0x0123456789ABCDEFLL, 1, 0x91A2B3C4D5E6F7LL },
57 { 0x0123456789ABCDEFLL, 2, 0x48D159E26AF37BLL },
58 { 0x0123456789ABCDEFLL, 3, 0x2468ACF13579BDLL },
59 { 0x0123456789ABCDEFLL, 4, 0x123456789ABCDELL },
60 { 0x0123456789ABCDEFLL, 28, 0x12345678LL },
61 { 0x0123456789ABCDEFLL, 29, 0x91A2B3CLL },
62 { 0x0123456789ABCDEFLL, 30, 0x48D159ELL },
63 { 0x0123456789ABCDEFLL, 31, 0x2468ACFLL },
64 { 0x0123456789ABCDEFLL, 32, 0x1234567LL },
65 { 0x0123456789ABCDEFLL, 33, 0x91A2B3LL },
66 { 0x0123456789ABCDEFLL, 34, 0x48D159LL },
67 { 0x0123456789ABCDEFLL, 35, 0x2468ACLL },
68 { 0x0123456789ABCDEFLL, 36, 0x123456LL },
69 { 0x0123456789ABCDEFLL, 60, 0 },
70 { 0x0123456789ABCDEFLL, 61, 0 },
71 { 0x0123456789ABCDEFLL, 62, 0 },
72 { 0x0123456789ABCDEFLL, 63, 0 },
73 { 0xFEDCBA9876543210LL, 0, 0xFEDCBA9876543210LL },
74 { 0xFEDCBA9876543210LL, 1, 0xFF6E5D4C3B2A1908LL },
75 { 0xFEDCBA9876543210LL, 2, 0xFFB72EA61D950C84LL },
76 { 0xFEDCBA9876543210LL, 3, 0xFFDB97530ECA8642LL },
77 { 0xFEDCBA9876543210LL, 4, 0xFFEDCBA987654321LL },
78 { 0xFEDCBA9876543210LL, 28, 0xFFFFFFFFEDCBA987LL },
79 { 0xFEDCBA9876543210LL, 29, 0xFFFFFFFFF6E5D4C3LL },
80 { 0xFEDCBA9876543210LL, 30, 0xFFFFFFFFFB72EA61LL },
81 { 0xFEDCBA9876543210LL, 31, 0xFFFFFFFFFDB97530LL },
82 { 0xFEDCBA9876543210LL, 32, 0xFFFFFFFFFEDCBA98LL },
83 { 0xFEDCBA9876543210LL, 33, 0xFFFFFFFFFF6E5D4CLL },
84 { 0xFEDCBA9876543210LL, 34, 0xFFFFFFFFFFB72EA6LL },
85 { 0xFEDCBA9876543210LL, 35, 0xFFFFFFFFFFDB9753LL },
86 { 0xFEDCBA9876543210LL, 36, 0xFFFFFFFFFFEDCBA9LL },
87 { 0xAEDCBA9876543210LL, 60, 0xFFFFFFFFFFFFFFFALL },
88 { 0xAEDCBA9876543210LL, 61, 0xFFFFFFFFFFFFFFFDLL },
89 { 0xAEDCBA9876543210LL, 62, 0xFFFFFFFFFFFFFFFELL },
90 { 0xAEDCBA9876543210LL, 63, 0xFFFFFFFFFFFFFFFFLL },
91};
92
93static void shdi3_test_ashrdi3(struct kunit *test)
94{
95 const struct shdi3_test_entry *e;
96 long long ret;
97
98 for (e = ashrdi3_testdata;
99 e < ashrdi3_testdata + ARRAY_SIZE(ashrdi3_testdata); e++) {
100 ret = __ashrdi3(e->input, e->shift);
101 KUNIT_EXPECT_EQ_MSG(test, ret, e->result,
102 " when evaluating __ashrdi3(%lld, %d)",
103 e->input, e->shift);
104 }
105}
106
107static const struct shdi3_test_entry lshrdi3_testdata[] = {
108 /* https://github.com/llvm/llvm-project/compiler-rt/test/builtins/Unit/lshrdi3_test.c */
109 { 0x0123456789ABCDEFLL, 0, 0x123456789ABCDEFLL },
110 { 0x0123456789ABCDEFLL, 1, 0x91A2B3C4D5E6F7LL },
111 { 0x0123456789ABCDEFLL, 2, 0x48D159E26AF37BLL },
112 { 0x0123456789ABCDEFLL, 3, 0x2468ACF13579BDLL },
113 { 0x0123456789ABCDEFLL, 4, 0x123456789ABCDELL },
114 { 0x0123456789ABCDEFLL, 28, 0x12345678LL },
115 { 0x0123456789ABCDEFLL, 29, 0x91A2B3CLL },
116 { 0x0123456789ABCDEFLL, 30, 0x48D159ELL },
117 { 0x0123456789ABCDEFLL, 31, 0x2468ACFLL },
118 { 0x0123456789ABCDEFLL, 32, 0x1234567LL },
119 { 0x0123456789ABCDEFLL, 33, 0x91A2B3LL },
120 { 0x0123456789ABCDEFLL, 34, 0x48D159LL },
121 { 0x0123456789ABCDEFLL, 35, 0x2468ACLL },
122 { 0x0123456789ABCDEFLL, 36, 0x123456LL },
123 { 0x0123456789ABCDEFLL, 60, 0 },
124 { 0x0123456789ABCDEFLL, 61, 0 },
125 { 0x0123456789ABCDEFLL, 62, 0 },
126 { 0x0123456789ABCDEFLL, 63, 0 },
127 { 0xFEDCBA9876543210LL, 0, 0xFEDCBA9876543210LL },
128 { 0xFEDCBA9876543210LL, 1, 0x7F6E5D4C3B2A1908LL },
129 { 0xFEDCBA9876543210LL, 2, 0x3FB72EA61D950C84LL },
130 { 0xFEDCBA9876543210LL, 3, 0x1FDB97530ECA8642LL },
131 { 0xFEDCBA9876543210LL, 4, 0xFEDCBA987654321LL },
132 { 0xFEDCBA9876543210LL, 28, 0xFEDCBA987LL },
133 { 0xFEDCBA9876543210LL, 29, 0x7F6E5D4C3LL },
134 { 0xFEDCBA9876543210LL, 30, 0x3FB72EA61LL },
135 { 0xFEDCBA9876543210LL, 31, 0x1FDB97530LL },
136 { 0xFEDCBA9876543210LL, 32, 0xFEDCBA98LL },
137 { 0xFEDCBA9876543210LL, 33, 0x7F6E5D4CLL },
138 { 0xFEDCBA9876543210LL, 34, 0x3FB72EA6LL },
139 { 0xFEDCBA9876543210LL, 35, 0x1FDB9753LL },
140 { 0xFEDCBA9876543210LL, 36, 0xFEDCBA9LL },
141 { 0xAEDCBA9876543210LL, 60, 0xALL },
142 { 0xAEDCBA9876543210LL, 61, 0x5LL },
143 { 0xAEDCBA9876543210LL, 62, 0x2LL },
144 { 0xAEDCBA9876543210LL, 63, 0x1LL },
145};
146
147static void shdi3_test_lshrdi3(struct kunit *test)
148{
149 const struct shdi3_test_entry *e;
150 long long ret;
151
152 for (e = lshrdi3_testdata;
153 e < lshrdi3_testdata + ARRAY_SIZE(lshrdi3_testdata); e++) {
154 ret = __lshrdi3(e->input, e->shift);
155 KUNIT_EXPECT_EQ_MSG(test, ret, e->result,
156 " when evaluating __lshrdi3(%lld, %d)",
157 e->input, e->shift);
158 }
159}
160
161static struct kunit_case shdi3_test_cases[] = {
162 KUNIT_CASE(shdi3_test_ashldi3),
163 KUNIT_CASE(shdi3_test_ashrdi3),
164 KUNIT_CASE(shdi3_test_lshrdi3),
165 {}
166};
167
168static struct kunit_suite shdi3_test_suite = {
169 .name = "shdi3",
170 .test_cases = shdi3_test_cases,
171};
172kunit_test_suite(shdi3_test_suite);
173
174MODULE_DESCRIPTION("Test cases for __ashldi3(), __ashrdi3(), and __lshrdi3()");
175MODULE_LICENSE("GPL");