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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_floatundidf
   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 //             du_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 __floatundidf(du_int a);
  16
  17 int test__floatundidf(di_int a, double expected)
  18 {
  19     double x = __floatundidf(a);
  20     if (x != expected)
  21         printf("error in __floatundidf(%llX) = %a, expected %a\n",
  22                a, x, expected);
  23     return x != expected;
  24 }
  25
  26 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
  27 char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0};
  28 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
  29
  30 int main()
  31 {
  32     if (test__floatundidf(0, 0.0))
  33         return 1;
  34
  35     if (test__floatundidf(1, 1.0))
  36         return 1;
  37     if (test__floatundidf(2, 2.0))
  38         return 1;
  39     if (test__floatundidf(20, 20.0))
  40         return 1;
  41
  42     if (test__floatundidf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62))
  43         return 1;
  44     if (test__floatundidf(0x7FFFFFFFFFFFF800LL, 0x1.FFFFFFFFFFFFEp+62))
  45         return 1;
  46     if (test__floatundidf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62))
  47         return 1;
  48     if (test__floatundidf(0x7FFFFFFFFFFFF000LL, 0x1.FFFFFFFFFFFFCp+62))
  49         return 1;
  50
  51     if (test__floatundidf(0x8000008000000000LL, 0x1.000001p+63))
  52         return 1;
  53     if (test__floatundidf(0x8000000000000800LL, 0x1.0000000000001p+63))
  54         return 1;
  55     if (test__floatundidf(0x8000010000000000LL, 0x1.000002p+63))
  56         return 1;
  57     if (test__floatundidf(0x8000000000001000LL, 0x1.0000000000002p+63))
  58         return 1;
  59
  60     if (test__floatundidf(0x8000000000000000LL, 0x1p+63))
  61         return 1;
  62     if (test__floatundidf(0x8000000000000001LL, 0x1p+63))
  63         return 1;
  64
  65     if (test__floatundidf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50))
  66         return 1;
  67
  68     if (test__floatundidf(0x0007FB72EA000000LL, 0x1.FEDCBA8p+50))
  69         return 1;
  70     if (test__floatundidf(0x0007FB72EB000000LL, 0x1.FEDCBACp+50))
  71         return 1;
  72     if (test__floatundidf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAFFFFFFCp+50))
  73         return 1;
  74     if (test__floatundidf(0x0007FB72EC000000LL, 0x1.FEDCBBp+50))
  75         return 1;
  76     if (test__floatundidf(0x0007FB72E8000001LL, 0x1.FEDCBA0000004p+50))
  77         return 1;
  78
  79     if (test__floatundidf(0x0007FB72E6000000LL, 0x1.FEDCB98p+50))
  80         return 1;
  81     if (test__floatundidf(0x0007FB72E7000000LL, 0x1.FEDCB9Cp+50))
  82         return 1;
  83     if (test__floatundidf(0x0007FB72E7FFFFFFLL, 0x1.FEDCB9FFFFFFCp+50))
  84         return 1;
  85     if (test__floatundidf(0x0007FB72E4000001LL, 0x1.FEDCB90000004p+50))
  86         return 1;
  87     if (test__floatundidf(0x0007FB72E4000000LL, 0x1.FEDCB9p+50))
  88         return 1;
  89
  90     if (test__floatundidf(0x023479FD0E092DC0LL, 0x1.1A3CFE870496Ep+57))
  91         return 1;
  92     if (test__floatundidf(0x023479FD0E092DA1LL, 0x1.1A3CFE870496Dp+57))
  93         return 1;
  94     if (test__floatundidf(0x023479FD0E092DB0LL, 0x1.1A3CFE870496Ep+57))
  95         return 1;
  96     if (test__floatundidf(0x023479FD0E092DB8LL, 0x1.1A3CFE870496Ep+57))
  97         return 1;
  98     if (test__floatundidf(0x023479FD0E092DB6LL, 0x1.1A3CFE870496Ep+57))
  99         return 1;
 100     if (test__floatundidf(0x023479FD0E092DBFLL, 0x1.1A3CFE870496Ep+57))
 101         return 1;
 102     if (test__floatundidf(0x023479FD0E092DC1LL, 0x1.1A3CFE870496Ep+57))
 103         return 1;
 104     if (test__floatundidf(0x023479FD0E092DC7LL, 0x1.1A3CFE870496Ep+57))
 105         return 1;
 106     if (test__floatundidf(0x023479FD0E092DC8LL, 0x1.1A3CFE870496Ep+57))
 107         return 1;
 108     if (test__floatundidf(0x023479FD0E092DCFLL, 0x1.1A3CFE870496Ep+57))
 109         return 1;
 110     if (test__floatundidf(0x023479FD0E092DD0LL, 0x1.1A3CFE870496Ep+57))
 111         return 1;
 112     if (test__floatundidf(0x023479FD0E092DD1LL, 0x1.1A3CFE870496Fp+57))
 113         return 1;
 114     if (test__floatundidf(0x023479FD0E092DD8LL, 0x1.1A3CFE870496Fp+57))
 115         return 1;
 116     if (test__floatundidf(0x023479FD0E092DDFLL, 0x1.1A3CFE870496Fp+57))
 117         return 1;
 118     if (test__floatundidf(0x023479FD0E092DE0LL, 0x1.1A3CFE870496Fp+57))
 119         return 1;
 120
 121    return 0;
 122 }