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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_floatuntidf
   3 // REQUIRES: int128
   4
   5 #include "int_lib.h"
   6 #include <float.h>
   7 #include <stdio.h>
   8
   9 #ifdef CRT_HAS_128BIT
  10
  11 // Returns: convert a to a double, rounding toward even.
  12
  13 // Assumption: double is a IEEE 64 bit floating point type
  14 //             tu_int is a 64 bit integral type
  15
  16 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
  17
  18 COMPILER_RT_ABI double __floatuntidf(tu_int a);
  19
  20 int test__floatuntidf(tu_int a, double expected)
  21 {
  22     double x = __floatuntidf(a);
  23     if (x != expected)
  24     {
  25         utwords at;
  26         at.all = a;
  27         printf("error in __floatuntidf(0x%.16llX%.16llX) = %a, expected %a\n",
  28                at.s.high, at.s.low, x, expected);
  29     }
  30     return x != expected;
  31 }
  32
  33 char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
  34 char assumption_2[sizeof(ti_int)*CHAR_BIT == 128] = {0};
  35 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
  36
  37 #endif
  38
  39 int main()
  40 {
  41 #ifdef CRT_HAS_128BIT
  42     if (test__floatuntidf(0, 0.0))
  43         return 1;
  44
  45     if (test__floatuntidf(1, 1.0))
  46         return 1;
  47     if (test__floatuntidf(2, 2.0))
  48         return 1;
  49     if (test__floatuntidf(20, 20.0))
  50         return 1;
  51
  52     if (test__floatuntidf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62))
  53         return 1;
  54     if (test__floatuntidf(0x7FFFFFFFFFFFF800LL, 0x1.FFFFFFFFFFFFEp+62))
  55         return 1;
  56     if (test__floatuntidf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62))
  57         return 1;
  58     if (test__floatuntidf(0x7FFFFFFFFFFFF000LL, 0x1.FFFFFFFFFFFFCp+62))
  59         return 1;
  60
  61     if (test__floatuntidf(make_ti(0x8000008000000000LL, 0), 0x1.000001p+127))
  62         return 1;
  63     if (test__floatuntidf(make_ti(0x8000000000000800LL, 0), 0x1.0000000000001p+127))
  64         return 1;
  65     if (test__floatuntidf(make_ti(0x8000010000000000LL, 0), 0x1.000002p+127))
  66         return 1;
  67     if (test__floatuntidf(make_ti(0x8000000000001000LL, 0), 0x1.0000000000002p+127))
  68         return 1;
  69
  70     if (test__floatuntidf(make_ti(0x8000000000000000LL, 0), 0x1.000000p+127))
  71         return 1;
  72     if (test__floatuntidf(make_ti(0x8000000000000001LL, 0), 0x1.0000000000000002p+127))
  73         return 1;
  74
  75     if (test__floatuntidf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50))
  76         return 1;
  77
  78     if (test__floatuntidf(0x0007FB72EA000000LL, 0x1.FEDCBA8p+50))
  79         return 1;
  80     if (test__floatuntidf(0x0007FB72EB000000LL, 0x1.FEDCBACp+50))
  81         return 1;
  82     if (test__floatuntidf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAFFFFFFCp+50))
  83         return 1;
  84     if (test__floatuntidf(0x0007FB72EC000000LL, 0x1.FEDCBBp+50))
  85         return 1;
  86     if (test__floatuntidf(0x0007FB72E8000001LL, 0x1.FEDCBA0000004p+50))
  87         return 1;
  88
  89     if (test__floatuntidf(0x0007FB72E6000000LL, 0x1.FEDCB98p+50))
  90         return 1;
  91     if (test__floatuntidf(0x0007FB72E7000000LL, 0x1.FEDCB9Cp+50))
  92         return 1;
  93     if (test__floatuntidf(0x0007FB72E7FFFFFFLL, 0x1.FEDCB9FFFFFFCp+50))
  94         return 1;
  95     if (test__floatuntidf(0x0007FB72E4000001LL, 0x1.FEDCB90000004p+50))
  96         return 1;
  97     if (test__floatuntidf(0x0007FB72E4000000LL, 0x1.FEDCB9p+50))
  98         return 1;
  99
 100     if (test__floatuntidf(0x023479FD0E092DC0LL, 0x1.1A3CFE870496Ep+57))
 101         return 1;
 102     if (test__floatuntidf(0x023479FD0E092DA1LL, 0x1.1A3CFE870496Dp+57))
 103         return 1;
 104     if (test__floatuntidf(0x023479FD0E092DB0LL, 0x1.1A3CFE870496Ep+57))
 105         return 1;
 106     if (test__floatuntidf(0x023479FD0E092DB8LL, 0x1.1A3CFE870496Ep+57))
 107         return 1;
 108     if (test__floatuntidf(0x023479FD0E092DB6LL, 0x1.1A3CFE870496Ep+57))
 109         return 1;
 110     if (test__floatuntidf(0x023479FD0E092DBFLL, 0x1.1A3CFE870496Ep+57))
 111         return 1;
 112     if (test__floatuntidf(0x023479FD0E092DC1LL, 0x1.1A3CFE870496Ep+57))
 113         return 1;
 114     if (test__floatuntidf(0x023479FD0E092DC7LL, 0x1.1A3CFE870496Ep+57))
 115         return 1;
 116     if (test__floatuntidf(0x023479FD0E092DC8LL, 0x1.1A3CFE870496Ep+57))
 117         return 1;
 118     if (test__floatuntidf(0x023479FD0E092DCFLL, 0x1.1A3CFE870496Ep+57))
 119         return 1;
 120     if (test__floatuntidf(0x023479FD0E092DD0LL, 0x1.1A3CFE870496Ep+57))
 121         return 1;
 122     if (test__floatuntidf(0x023479FD0E092DD1LL, 0x1.1A3CFE870496Fp+57))
 123         return 1;
 124     if (test__floatuntidf(0x023479FD0E092DD8LL, 0x1.1A3CFE870496Fp+57))
 125         return 1;
 126     if (test__floatuntidf(0x023479FD0E092DDFLL, 0x1.1A3CFE870496Fp+57))
 127         return 1;
 128     if (test__floatuntidf(0x023479FD0E092DE0LL, 0x1.1A3CFE870496Fp+57))
 129         return 1;
 130
 131     if (test__floatuntidf(make_ti(0x023479FD0E092DC0LL, 0), 0x1.1A3CFE870496Ep+121))
 132         return 1;
 133     if (test__floatuntidf(make_ti(0x023479FD0E092DA1LL, 1), 0x1.1A3CFE870496Dp+121))
 134         return 1;
 135     if (test__floatuntidf(make_ti(0x023479FD0E092DB0LL, 2), 0x1.1A3CFE870496Ep+121))
 136         return 1;
 137     if (test__floatuntidf(make_ti(0x023479FD0E092DB8LL, 3), 0x1.1A3CFE870496Ep+121))
 138         return 1;
 139     if (test__floatuntidf(make_ti(0x023479FD0E092DB6LL, 4), 0x1.1A3CFE870496Ep+121))
 140         return 1;
 141     if (test__floatuntidf(make_ti(0x023479FD0E092DBFLL, 5), 0x1.1A3CFE870496Ep+121))
 142         return 1;
 143     if (test__floatuntidf(make_ti(0x023479FD0E092DC1LL, 6), 0x1.1A3CFE870496Ep+121))
 144         return 1;
 145     if (test__floatuntidf(make_ti(0x023479FD0E092DC7LL, 7), 0x1.1A3CFE870496Ep+121))
 146         return 1;
 147     if (test__floatuntidf(make_ti(0x023479FD0E092DC8LL, 8), 0x1.1A3CFE870496Ep+121))
 148         return 1;
 149     if (test__floatuntidf(make_ti(0x023479FD0E092DCFLL, 9), 0x1.1A3CFE870496Ep+121))
 150         return 1;
 151     if (test__floatuntidf(make_ti(0x023479FD0E092DD0LL, 0), 0x1.1A3CFE870496Ep+121))
 152         return 1;
 153     if (test__floatuntidf(make_ti(0x023479FD0E092DD1LL, 11), 0x1.1A3CFE870496Fp+121))
 154         return 1;
 155     if (test__floatuntidf(make_ti(0x023479FD0E092DD8LL, 12), 0x1.1A3CFE870496Fp+121))
 156         return 1;
 157     if (test__floatuntidf(make_ti(0x023479FD0E092DDFLL, 13), 0x1.1A3CFE870496Fp+121))
 158         return 1;
 159     if (test__floatuntidf(make_ti(0x023479FD0E092DE0LL, 14), 0x1.1A3CFE870496Fp+121))
 160         return 1;
 161 #else
 162     printf("skipped\n");
 163 #endif
 164    return 0;
 165 }