128 lines · c
1// RUN: %clang_builtins %s %librt -o %t && %run %t2// REQUIRES: librt_has_floatdidf3 4#include "int_lib.h"5#include <float.h>6#include <stdio.h>7 8// Returns: convert a to a double, rounding toward even.9 10// Assumption: double is a IEEE 64 bit floating point type 11// di_int is a 64 bit integral type12 13// seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm14 15COMPILER_RT_ABI double __floatdidf(di_int a);16 17int test__floatdidf(di_int a, double expected)18{19 double x = __floatdidf(a);20 if (x != expected)21 printf("error in __floatdidf(%llX) = %a, expected %a\n", a, x, expected);22 return x != expected;23}24 25char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};26char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0};27char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};28 29int main()30{31 if (test__floatdidf(0, 0.0))32 return 1;33 34 if (test__floatdidf(1, 1.0))35 return 1;36 if (test__floatdidf(2, 2.0))37 return 1;38 if (test__floatdidf(20, 20.0))39 return 1;40 if (test__floatdidf(-1, -1.0))41 return 1;42 if (test__floatdidf(-2, -2.0))43 return 1;44 if (test__floatdidf(-20, -20.0))45 return 1;46 47 if (test__floatdidf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62))48 return 1;49 if (test__floatdidf(0x7FFFFFFFFFFFF800LL, 0x1.FFFFFFFFFFFFEp+62))50 return 1;51 if (test__floatdidf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62))52 return 1;53 if (test__floatdidf(0x7FFFFFFFFFFFF000LL, 0x1.FFFFFFFFFFFFCp+62))54 return 1;55 56 if (test__floatdidf(0x8000008000000000LL, -0x1.FFFFFEp+62))57 return 1;58 if (test__floatdidf(0x8000000000000800LL, -0x1.FFFFFFFFFFFFEp+62))59 return 1;60 if (test__floatdidf(0x8000010000000000LL, -0x1.FFFFFCp+62))61 return 1;62 if (test__floatdidf(0x8000000000001000LL, -0x1.FFFFFFFFFFFFCp+62))63 return 1;64 65 if (test__floatdidf(0x8000000000000000LL, -0x1.000000p+63))66 return 1;67 if (test__floatdidf(0x8000000000000001LL, -0x1.000000p+63))68 return 1;69 70 if (test__floatdidf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50))71 return 1;72 73 if (test__floatdidf(0x0007FB72EA000000LL, 0x1.FEDCBA8p+50))74 return 1;75 if (test__floatdidf(0x0007FB72EB000000LL, 0x1.FEDCBACp+50))76 return 1;77 if (test__floatdidf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAFFFFFFCp+50))78 return 1;79 if (test__floatdidf(0x0007FB72EC000000LL, 0x1.FEDCBBp+50))80 return 1;81 if (test__floatdidf(0x0007FB72E8000001LL, 0x1.FEDCBA0000004p+50))82 return 1;83 84 if (test__floatdidf(0x0007FB72E6000000LL, 0x1.FEDCB98p+50))85 return 1;86 if (test__floatdidf(0x0007FB72E7000000LL, 0x1.FEDCB9Cp+50))87 return 1;88 if (test__floatdidf(0x0007FB72E7FFFFFFLL, 0x1.FEDCB9FFFFFFCp+50))89 return 1;90 if (test__floatdidf(0x0007FB72E4000001LL, 0x1.FEDCB90000004p+50))91 return 1;92 if (test__floatdidf(0x0007FB72E4000000LL, 0x1.FEDCB9p+50))93 return 1;94 95 if (test__floatdidf(0x023479FD0E092DC0LL, 0x1.1A3CFE870496Ep+57))96 return 1;97 if (test__floatdidf(0x023479FD0E092DA1LL, 0x1.1A3CFE870496Dp+57))98 return 1;99 if (test__floatdidf(0x023479FD0E092DB0LL, 0x1.1A3CFE870496Ep+57))100 return 1;101 if (test__floatdidf(0x023479FD0E092DB8LL, 0x1.1A3CFE870496Ep+57))102 return 1;103 if (test__floatdidf(0x023479FD0E092DB6LL, 0x1.1A3CFE870496Ep+57))104 return 1;105 if (test__floatdidf(0x023479FD0E092DBFLL, 0x1.1A3CFE870496Ep+57))106 return 1;107 if (test__floatdidf(0x023479FD0E092DC1LL, 0x1.1A3CFE870496Ep+57))108 return 1;109 if (test__floatdidf(0x023479FD0E092DC7LL, 0x1.1A3CFE870496Ep+57))110 return 1;111 if (test__floatdidf(0x023479FD0E092DC8LL, 0x1.1A3CFE870496Ep+57))112 return 1;113 if (test__floatdidf(0x023479FD0E092DCFLL, 0x1.1A3CFE870496Ep+57))114 return 1;115 if (test__floatdidf(0x023479FD0E092DD0LL, 0x1.1A3CFE870496Ep+57))116 return 1;117 if (test__floatdidf(0x023479FD0E092DD1LL, 0x1.1A3CFE870496Fp+57))118 return 1;119 if (test__floatdidf(0x023479FD0E092DD8LL, 0x1.1A3CFE870496Fp+57))120 return 1;121 if (test__floatdidf(0x023479FD0E092DDFLL, 0x1.1A3CFE870496Fp+57))122 return 1;123 if (test__floatdidf(0x023479FD0E092DE0LL, 0x1.1A3CFE870496Fp+57))124 return 1;125 126 return 0;127}128