compiler-rt/test/builtins/Unit/floatdidf_test.c

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_floatdidf
   3
   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 type
  12
  13 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
  14
  15 COMPILER_RT_ABI double __floatdidf(di_int a);
  16
  17 int 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
  25 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
  26 char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0};
  27 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
  28
  29 int 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 }