1 /*
2 * Test bit count routines
3 *
4 * This work is licensed under the terms of the GNU LGPL, version 2 or later.
5 * See the COPYING.LIB file in the top-level directory.
6 *
7 */
8
9 #include "qemu/osdep.h"
10 #include "qemu/host-utils.h"
11
12 struct bitcnt_test_data {
13 /* value to count */
14 union {
15 uint8_t w8;
16 uint16_t w16;
17 uint32_t w32;
18 uint64_t w64;
19 } value;
20 /* expected result */
21 int popct;
22 };
23
24 struct bitcnt_test_data eight_bit_data[] = {
25 { { .w8 = 0x00 }, .popct=0 },
26 { { .w8 = 0x01 }, .popct=1 },
27 { { .w8 = 0x03 }, .popct=2 },
28 { { .w8 = 0x04 }, .popct=1 },
29 { { .w8 = 0x0f }, .popct=4 },
30 { { .w8 = 0x3f }, .popct=6 },
31 { { .w8 = 0x40 }, .popct=1 },
32 { { .w8 = 0xf0 }, .popct=4 },
33 { { .w8 = 0x7f }, .popct=7 },
34 { { .w8 = 0x80 }, .popct=1 },
35 { { .w8 = 0xf1 }, .popct=5 },
36 { { .w8 = 0xfe }, .popct=7 },
37 { { .w8 = 0xff }, .popct=8 },
38 };
39
test_ctpop8(void)40 static void test_ctpop8(void)
41 {
42 int i;
43
44 for (i = 0; i < ARRAY_SIZE(eight_bit_data); i++) {
45 struct bitcnt_test_data *d = &eight_bit_data[i];
46 g_assert(ctpop8(d->value.w8)==d->popct);
47 }
48 }
49
50 struct bitcnt_test_data sixteen_bit_data[] = {
51 { { .w16 = 0x0000 }, .popct=0 },
52 { { .w16 = 0x0001 }, .popct=1 },
53 { { .w16 = 0x0003 }, .popct=2 },
54 { { .w16 = 0x000f }, .popct=4 },
55 { { .w16 = 0x003f }, .popct=6 },
56 { { .w16 = 0x00f0 }, .popct=4 },
57 { { .w16 = 0x0f0f }, .popct=8 },
58 { { .w16 = 0x1f1f }, .popct=10 },
59 { { .w16 = 0x4000 }, .popct=1 },
60 { { .w16 = 0x4001 }, .popct=2 },
61 { { .w16 = 0x7000 }, .popct=3 },
62 { { .w16 = 0x7fff }, .popct=15 },
63 };
64
test_ctpop16(void)65 static void test_ctpop16(void)
66 {
67 int i;
68
69 for (i = 0; i < ARRAY_SIZE(sixteen_bit_data); i++) {
70 struct bitcnt_test_data *d = &sixteen_bit_data[i];
71 g_assert(ctpop16(d->value.w16)==d->popct);
72 }
73 }
74
75 struct bitcnt_test_data thirtytwo_bit_data[] = {
76 { { .w32 = 0x00000000 }, .popct=0 },
77 { { .w32 = 0x00000001 }, .popct=1 },
78 { { .w32 = 0x0000000f }, .popct=4 },
79 { { .w32 = 0x00000f0f }, .popct=8 },
80 { { .w32 = 0x00001f1f }, .popct=10 },
81 { { .w32 = 0x00004001 }, .popct=2 },
82 { { .w32 = 0x00007000 }, .popct=3 },
83 { { .w32 = 0x00007fff }, .popct=15 },
84 { { .w32 = 0x55555555 }, .popct=16 },
85 { { .w32 = 0xaaaaaaaa }, .popct=16 },
86 { { .w32 = 0xff000000 }, .popct=8 },
87 { { .w32 = 0xc0c0c0c0 }, .popct=8 },
88 { { .w32 = 0x0ffffff0 }, .popct=24 },
89 { { .w32 = 0x80000000 }, .popct=1 },
90 { { .w32 = 0xffffffff }, .popct=32 },
91 };
92
test_ctpop32(void)93 static void test_ctpop32(void)
94 {
95 int i;
96
97 for (i = 0; i < ARRAY_SIZE(thirtytwo_bit_data); i++) {
98 struct bitcnt_test_data *d = &thirtytwo_bit_data[i];
99 g_assert(ctpop32(d->value.w32)==d->popct);
100 }
101 }
102
103 struct bitcnt_test_data sixtyfour_bit_data[] = {
104 { { .w64 = 0x0000000000000000ULL }, .popct=0 },
105 { { .w64 = 0x0000000000000001ULL }, .popct=1 },
106 { { .w64 = 0x000000000000000fULL }, .popct=4 },
107 { { .w64 = 0x0000000000000f0fULL }, .popct=8 },
108 { { .w64 = 0x0000000000001f1fULL }, .popct=10 },
109 { { .w64 = 0x0000000000004001ULL }, .popct=2 },
110 { { .w64 = 0x0000000000007000ULL }, .popct=3 },
111 { { .w64 = 0x0000000000007fffULL }, .popct=15 },
112 { { .w64 = 0x0000005500555555ULL }, .popct=16 },
113 { { .w64 = 0x00aa0000aaaa00aaULL }, .popct=16 },
114 { { .w64 = 0x000f000000f00000ULL }, .popct=8 },
115 { { .w64 = 0x0c0c0000c0c0c0c0ULL }, .popct=12 },
116 { { .w64 = 0xf00f00f0f0f0f000ULL }, .popct=24 },
117 { { .w64 = 0x8000000000000000ULL }, .popct=1 },
118 { { .w64 = 0xf0f0f0f0f0f0f0f0ULL }, .popct=32 },
119 { { .w64 = 0xffffffffffffffffULL }, .popct=64 },
120 };
121
test_ctpop64(void)122 static void test_ctpop64(void)
123 {
124 int i;
125
126 for (i = 0; i < ARRAY_SIZE(sixtyfour_bit_data); i++) {
127 struct bitcnt_test_data *d = &sixtyfour_bit_data[i];
128 g_assert(ctpop64(d->value.w64)==d->popct);
129 }
130 }
131
main(int argc,char ** argv)132 int main(int argc, char **argv)
133 {
134 g_test_init(&argc, &argv, NULL);
135 g_test_add_func("/bitcnt/ctpop8", test_ctpop8);
136 g_test_add_func("/bitcnt/ctpop16", test_ctpop16);
137 g_test_add_func("/bitcnt/ctpop32", test_ctpop32);
138 g_test_add_func("/bitcnt/ctpop64", test_ctpop64);
139 return g_test_run();
140 }
141