Alex Bennée | c3f8962 | 2016-12-09 14:36:00 +0000 | [diff] [blame] | 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | } |