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      1 //===-- floattidf.c - Test __floattidf ------------------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 //
     10 // This file tests __floattidf for the compiler_rt library.
     11 //
     12 //===----------------------------------------------------------------------===//
     13 
     14 #if __x86_64
     15 
     16 #include "int_lib.h"
     17 #include <float.h>
     18 #include <stdio.h>
     19 
     20 // Returns: convert a to a double, rounding toward even.
     21 
     22 // Assumption: double is a IEEE 64 bit floating point type
     23 //             ti_int is a 64 bit integral type
     24 
     25 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
     26 
     27 double __floattidf(ti_int a);
     28 
     29 int test__floattidf(ti_int a, double expected)
     30 {
     31     double x = __floattidf(a);
     32     if (x != expected)
     33     {
     34         twords at;
     35         at.all = a;
     36         printf("error in __floattidf(0x%.16llX%.16llX) = %a, expected %a\n",
     37                at.s.high, at.s.low, x, expected);
     38     }
     39     return x != expected;
     40 }
     41 
     42 char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
     43 char assumption_2[sizeof(ti_int)*CHAR_BIT == 128] = {0};
     44 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
     45 
     46 #endif
     47 
     48 int main()
     49 {
     50 #if __x86_64
     51     if (test__floattidf(0, 0.0))
     52         return 1;
     53 
     54     if (test__floattidf(1, 1.0))
     55         return 1;
     56     if (test__floattidf(2, 2.0))
     57         return 1;
     58     if (test__floattidf(20, 20.0))
     59         return 1;
     60     if (test__floattidf(-1, -1.0))
     61         return 1;
     62     if (test__floattidf(-2, -2.0))
     63         return 1;
     64     if (test__floattidf(-20, -20.0))
     65         return 1;
     66 
     67     if (test__floattidf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62))
     68         return 1;
     69     if (test__floattidf(0x7FFFFFFFFFFFF800LL, 0x1.FFFFFFFFFFFFEp+62))
     70         return 1;
     71     if (test__floattidf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62))
     72         return 1;
     73     if (test__floattidf(0x7FFFFFFFFFFFF000LL, 0x1.FFFFFFFFFFFFCp+62))
     74         return 1;
     75 
     76     if (test__floattidf(make_ti(0x8000008000000000LL, 0), -0x1.FFFFFEp+126))
     77         return 1;
     78     if (test__floattidf(make_ti(0x8000000000000800LL, 0), -0x1.FFFFFFFFFFFFEp+126))
     79         return 1;
     80     if (test__floattidf(make_ti(0x8000010000000000LL, 0), -0x1.FFFFFCp+126))
     81         return 1;
     82     if (test__floattidf(make_ti(0x8000000000001000LL, 0), -0x1.FFFFFFFFFFFFCp+126))
     83         return 1;
     84 
     85     if (test__floattidf(make_ti(0x8000000000000000LL, 0), -0x1.000000p+127))
     86         return 1;
     87     if (test__floattidf(make_ti(0x8000000000000001LL, 0), -0x1.000000p+127))
     88         return 1;
     89 
     90     if (test__floattidf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50))
     91         return 1;
     92 
     93     if (test__floattidf(0x0007FB72EA000000LL, 0x1.FEDCBA8p+50))
     94         return 1;
     95     if (test__floattidf(0x0007FB72EB000000LL, 0x1.FEDCBACp+50))
     96         return 1;
     97     if (test__floattidf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAFFFFFFCp+50))
     98         return 1;
     99     if (test__floattidf(0x0007FB72EC000000LL, 0x1.FEDCBBp+50))
    100         return 1;
    101     if (test__floattidf(0x0007FB72E8000001LL, 0x1.FEDCBA0000004p+50))
    102         return 1;
    103 
    104     if (test__floattidf(0x0007FB72E6000000LL, 0x1.FEDCB98p+50))
    105         return 1;
    106     if (test__floattidf(0x0007FB72E7000000LL, 0x1.FEDCB9Cp+50))
    107         return 1;
    108     if (test__floattidf(0x0007FB72E7FFFFFFLL, 0x1.FEDCB9FFFFFFCp+50))
    109         return 1;
    110     if (test__floattidf(0x0007FB72E4000001LL, 0x1.FEDCB90000004p+50))
    111         return 1;
    112     if (test__floattidf(0x0007FB72E4000000LL, 0x1.FEDCB9p+50))
    113         return 1;
    114 
    115     if (test__floattidf(0x023479FD0E092DC0LL, 0x1.1A3CFE870496Ep+57))
    116         return 1;
    117     if (test__floattidf(0x023479FD0E092DA1LL, 0x1.1A3CFE870496Dp+57))
    118         return 1;
    119     if (test__floattidf(0x023479FD0E092DB0LL, 0x1.1A3CFE870496Ep+57))
    120         return 1;
    121     if (test__floattidf(0x023479FD0E092DB8LL, 0x1.1A3CFE870496Ep+57))
    122         return 1;
    123     if (test__floattidf(0x023479FD0E092DB6LL, 0x1.1A3CFE870496Ep+57))
    124         return 1;
    125     if (test__floattidf(0x023479FD0E092DBFLL, 0x1.1A3CFE870496Ep+57))
    126         return 1;
    127     if (test__floattidf(0x023479FD0E092DC1LL, 0x1.1A3CFE870496Ep+57))
    128         return 1;
    129     if (test__floattidf(0x023479FD0E092DC7LL, 0x1.1A3CFE870496Ep+57))
    130         return 1;
    131     if (test__floattidf(0x023479FD0E092DC8LL, 0x1.1A3CFE870496Ep+57))
    132         return 1;
    133     if (test__floattidf(0x023479FD0E092DCFLL, 0x1.1A3CFE870496Ep+57))
    134         return 1;
    135     if (test__floattidf(0x023479FD0E092DD0LL, 0x1.1A3CFE870496Ep+57))
    136         return 1;
    137     if (test__floattidf(0x023479FD0E092DD1LL, 0x1.1A3CFE870496Fp+57))
    138         return 1;
    139     if (test__floattidf(0x023479FD0E092DD8LL, 0x1.1A3CFE870496Fp+57))
    140         return 1;
    141     if (test__floattidf(0x023479FD0E092DDFLL, 0x1.1A3CFE870496Fp+57))
    142         return 1;
    143     if (test__floattidf(0x023479FD0E092DE0LL, 0x1.1A3CFE870496Fp+57))
    144         return 1;
    145 
    146     if (test__floattidf(make_ti(0x023479FD0E092DC0LL, 0), 0x1.1A3CFE870496Ep+121))
    147         return 1;
    148     if (test__floattidf(make_ti(0x023479FD0E092DA1LL, 1), 0x1.1A3CFE870496Dp+121))
    149         return 1;
    150     if (test__floattidf(make_ti(0x023479FD0E092DB0LL, 2), 0x1.1A3CFE870496Ep+121))
    151         return 1;
    152     if (test__floattidf(make_ti(0x023479FD0E092DB8LL, 3), 0x1.1A3CFE870496Ep+121))
    153         return 1;
    154     if (test__floattidf(make_ti(0x023479FD0E092DB6LL, 4), 0x1.1A3CFE870496Ep+121))
    155         return 1;
    156     if (test__floattidf(make_ti(0x023479FD0E092DBFLL, 5), 0x1.1A3CFE870496Ep+121))
    157         return 1;
    158     if (test__floattidf(make_ti(0x023479FD0E092DC1LL, 6), 0x1.1A3CFE870496Ep+121))
    159         return 1;
    160     if (test__floattidf(make_ti(0x023479FD0E092DC7LL, 7), 0x1.1A3CFE870496Ep+121))
    161         return 1;
    162     if (test__floattidf(make_ti(0x023479FD0E092DC8LL, 8), 0x1.1A3CFE870496Ep+121))
    163         return 1;
    164     if (test__floattidf(make_ti(0x023479FD0E092DCFLL, 9), 0x1.1A3CFE870496Ep+121))
    165         return 1;
    166     if (test__floattidf(make_ti(0x023479FD0E092DD0LL, 0), 0x1.1A3CFE870496Ep+121))
    167         return 1;
    168     if (test__floattidf(make_ti(0x023479FD0E092DD1LL, 11), 0x1.1A3CFE870496Fp+121))
    169         return 1;
    170     if (test__floattidf(make_ti(0x023479FD0E092DD8LL, 12), 0x1.1A3CFE870496Fp+121))
    171         return 1;
    172     if (test__floattidf(make_ti(0x023479FD0E092DDFLL, 13), 0x1.1A3CFE870496Fp+121))
    173         return 1;
    174     if (test__floattidf(make_ti(0x023479FD0E092DE0LL, 14), 0x1.1A3CFE870496Fp+121))
    175         return 1;
    176 #endif
    177    return 0;
    178 }
    179