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 } 141