1 // RUN: %clang_builtins %s %librt -o %t && %run %t 2 // REQUIRES: librt_has_floatdidf 3 //===-- floatdidf.c - Test __floatdidf ------------------------------------===// 4 // 5 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 6 // See https://llvm.org/LICENSE.txt for license information. 7 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 8 // 9 //===----------------------------------------------------------------------===// 10 // 11 // This file tests __floatdidf for the compiler_rt library. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #include "int_lib.h" 16 #include <float.h> 17 #include <stdio.h> 18 19 // Returns: convert a to a double, rounding toward even. 20 21 // Assumption: double is a IEEE 64 bit floating point type 22 // di_int is a 64 bit integral type 23 24 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm 25 26 COMPILER_RT_ABI double __floatdidf(di_int a); 27 28 int test__floatdidf(di_int a, double expected) 29 { 30 double x = __floatdidf(a); 31 if (x != expected) 32 printf("error in __floatdidf(%llX) = %a, expected %a\n", a, x, expected); 33 return x != expected; 34 } 35 36 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0}; 37 char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0}; 38 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0}; 39 40 int main() 41 { 42 if (test__floatdidf(0, 0.0)) 43 return 1; 44 45 if (test__floatdidf(1, 1.0)) 46 return 1; 47 if (test__floatdidf(2, 2.0)) 48 return 1; 49 if (test__floatdidf(20, 20.0)) 50 return 1; 51 if (test__floatdidf(-1, -1.0)) 52 return 1; 53 if (test__floatdidf(-2, -2.0)) 54 return 1; 55 if (test__floatdidf(-20, -20.0)) 56 return 1; 57 58 if (test__floatdidf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62)) 59 return 1; 60 if (test__floatdidf(0x7FFFFFFFFFFFF800LL, 0x1.FFFFFFFFFFFFEp+62)) 61 return 1; 62 if (test__floatdidf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62)) 63 return 1; 64 if (test__floatdidf(0x7FFFFFFFFFFFF000LL, 0x1.FFFFFFFFFFFFCp+62)) 65 return 1; 66 67 if (test__floatdidf(0x8000008000000000LL, -0x1.FFFFFEp+62)) 68 return 1; 69 if (test__floatdidf(0x8000000000000800LL, -0x1.FFFFFFFFFFFFEp+62)) 70 return 1; 71 if (test__floatdidf(0x8000010000000000LL, -0x1.FFFFFCp+62)) 72 return 1; 73 if (test__floatdidf(0x8000000000001000LL, -0x1.FFFFFFFFFFFFCp+62)) 74 return 1; 75 76 if (test__floatdidf(0x8000000000000000LL, -0x1.000000p+63)) 77 return 1; 78 if (test__floatdidf(0x8000000000000001LL, -0x1.000000p+63)) 79 return 1; 80 81 if (test__floatdidf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50)) 82 return 1; 83 84 if (test__floatdidf(0x0007FB72EA000000LL, 0x1.FEDCBA8p+50)) 85 return 1; 86 if (test__floatdidf(0x0007FB72EB000000LL, 0x1.FEDCBACp+50)) 87 return 1; 88 if (test__floatdidf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAFFFFFFCp+50)) 89 return 1; 90 if (test__floatdidf(0x0007FB72EC000000LL, 0x1.FEDCBBp+50)) 91 return 1; 92 if (test__floatdidf(0x0007FB72E8000001LL, 0x1.FEDCBA0000004p+50)) 93 return 1; 94 95 if (test__floatdidf(0x0007FB72E6000000LL, 0x1.FEDCB98p+50)) 96 return 1; 97 if (test__floatdidf(0x0007FB72E7000000LL, 0x1.FEDCB9Cp+50)) 98 return 1; 99 if (test__floatdidf(0x0007FB72E7FFFFFFLL, 0x1.FEDCB9FFFFFFCp+50)) 100 return 1; 101 if (test__floatdidf(0x0007FB72E4000001LL, 0x1.FEDCB90000004p+50)) 102 return 1; 103 if (test__floatdidf(0x0007FB72E4000000LL, 0x1.FEDCB9p+50)) 104 return 1; 105 106 if (test__floatdidf(0x023479FD0E092DC0LL, 0x1.1A3CFE870496Ep+57)) 107 return 1; 108 if (test__floatdidf(0x023479FD0E092DA1LL, 0x1.1A3CFE870496Dp+57)) 109 return 1; 110 if (test__floatdidf(0x023479FD0E092DB0LL, 0x1.1A3CFE870496Ep+57)) 111 return 1; 112 if (test__floatdidf(0x023479FD0E092DB8LL, 0x1.1A3CFE870496Ep+57)) 113 return 1; 114 if (test__floatdidf(0x023479FD0E092DB6LL, 0x1.1A3CFE870496Ep+57)) 115 return 1; 116 if (test__floatdidf(0x023479FD0E092DBFLL, 0x1.1A3CFE870496Ep+57)) 117 return 1; 118 if (test__floatdidf(0x023479FD0E092DC1LL, 0x1.1A3CFE870496Ep+57)) 119 return 1; 120 if (test__floatdidf(0x023479FD0E092DC7LL, 0x1.1A3CFE870496Ep+57)) 121 return 1; 122 if (test__floatdidf(0x023479FD0E092DC8LL, 0x1.1A3CFE870496Ep+57)) 123 return 1; 124 if (test__floatdidf(0x023479FD0E092DCFLL, 0x1.1A3CFE870496Ep+57)) 125 return 1; 126 if (test__floatdidf(0x023479FD0E092DD0LL, 0x1.1A3CFE870496Ep+57)) 127 return 1; 128 if (test__floatdidf(0x023479FD0E092DD1LL, 0x1.1A3CFE870496Fp+57)) 129 return 1; 130 if (test__floatdidf(0x023479FD0E092DD8LL, 0x1.1A3CFE870496Fp+57)) 131 return 1; 132 if (test__floatdidf(0x023479FD0E092DDFLL, 0x1.1A3CFE870496Fp+57)) 133 return 1; 134 if (test__floatdidf(0x023479FD0E092DE0LL, 0x1.1A3CFE870496Fp+57)) 135 return 1; 136 137 return 0; 138 } 139