1 /* 2 * Copyright (c) 2014 Travis Geiselbrecht 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining 5 * a copy of this software and associated documentation files 6 * (the "Software"), to deal in the Software without restriction, 7 * including without limitation the rights to use, copy, modify, merge, 8 * publish, distribute, sublicense, and/or sell copies of the Software, 9 * and to permit persons to whom the Software is furnished to do so, 10 * subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be 13 * included in all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 19 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 20 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 21 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 22 */ 23 24 #include <stdint.h> 25 26 union double_int { 27 double d; 28 uint64_t i; 29 }; 30 31 static const union double_int float_test_vec[] = { 32 { .d = -2.0 }, 33 { .d = -1.0 }, 34 { .d = -0.5 }, 35 { .d = -0.0 }, 36 { .d = 0.0 }, 37 { .d = 0.01 }, 38 { .d = 0.1 }, 39 { .d = 0.2 }, 40 { .d = 0.25 }, 41 { .d = 0.5 }, 42 { .d = 0.75 }, 43 { .d = 1.0 }, 44 { .d = 2.0 }, 45 { .d = 3.0 }, 46 { .d = 10.0 }, 47 { .d = 100.0 }, 48 { .d = 123456.0 }, 49 { .d = -123456.0 }, 50 { .d = 546.5645644531f }, 51 { .d = -546.5645644531f }, 52 { .d = 0.12345 }, 53 { .d = 0.0000012345 }, 54 { .d = 0.0000019999 }, 55 { .d = 0.0000015 }, 56 { .i = 0x4005bf0a8b145649ULL }, // e 57 { .i = 0x400921fb54442d18ULL }, // pi 58 { .i = 0x43f0000000000000ULL }, // 2^64 59 { .i = 0x7fefffffffffffffULL }, // largest normalized 60 { .i = 0x0010000000000000ULL }, // least positive normalized 61 { .i = 0x0000000000000001ULL }, // smallest possible denorm 62 { .i = 0x000fffffffffffffULL }, // largest possible denorm 63 { .i = 0x7ff0000000000001ULL }, // smallest SNAn 64 { .i = 0x7ff7ffffffffffffULL }, // largest SNAn 65 { .i = 0x7ff8000000000000ULL }, // smallest QNAn 66 { .i = 0x7fffffffffffffffULL }, // largest QNAn 67 { .i = 0xfff0000000000000ULL }, // -infinity 68 { .i = 0x7ff0000000000000ULL }, // +infinity 69 }; 70 71 #define countof(a) (sizeof(a) / sizeof((a)[0])) 72 static const unsigned int float_test_vec_size = countof(float_test_vec); 73 74 #define PRINT_FLOAT \ 75 printf("0x%016llx %f %F %a %A\n", \ 76 float_test_vec[i], \ 77 *(const double *)&float_test_vec[i], \ 78 *(const double *)&float_test_vec[i], \ 79 *(const double *)&float_test_vec[i], \ 80 *(const double *)&float_test_vec[i]) 81 82