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      1 //===-- floatundidf_test.c - Test __floatundidf ---------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is dual licensed under the MIT and the University of Illinois Open
      6 // Source Licenses. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 //
     10 // This file tests __floatundidf for the compiler_rt library.
     11 //
     12 //===----------------------------------------------------------------------===//
     13 
     14 #include "int_lib.h"
     15 #include <float.h>
     16 #include <stdio.h>
     17 
     18 // Returns: convert a to a double, rounding toward even.
     19 
     20 // Assumption: double is a IEEE 64 bit floating point type
     21 //             du_int is a 64 bit integral type
     22 
     23 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
     24 
     25 double __floatundidf(du_int a);
     26 
     27 int test__floatundidf(di_int a, double expected)
     28 {
     29     double x = __floatundidf(a);
     30     if (x != expected)
     31         printf("error in __floatundidf(%llX) = %a, expected %a\n",
     32                a, x, expected);
     33     return x != expected;
     34 }
     35 
     36 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
     37 char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0};
     38 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
     39 
     40 int main()
     41 {
     42     if (test__floatundidf(0, 0.0))
     43         return 1;
     44 
     45     if (test__floatundidf(1, 1.0))
     46         return 1;
     47     if (test__floatundidf(2, 2.0))
     48         return 1;
     49     if (test__floatundidf(20, 20.0))
     50         return 1;
     51 
     52     if (test__floatundidf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62))
     53         return 1;
     54     if (test__floatundidf(0x7FFFFFFFFFFFF800LL, 0x1.FFFFFFFFFFFFEp+62))
     55         return 1;
     56     if (test__floatundidf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62))
     57         return 1;
     58     if (test__floatundidf(0x7FFFFFFFFFFFF000LL, 0x1.FFFFFFFFFFFFCp+62))
     59         return 1;
     60 
     61     if (test__floatundidf(0x8000008000000000LL, 0x1.000001p+63))
     62         return 1;
     63     if (test__floatundidf(0x8000000000000800LL, 0x1.0000000000001p+63))
     64         return 1;
     65     if (test__floatundidf(0x8000010000000000LL, 0x1.000002p+63))
     66         return 1;
     67     if (test__floatundidf(0x8000000000001000LL, 0x1.0000000000002p+63))
     68         return 1;
     69 
     70     if (test__floatundidf(0x8000000000000000LL, 0x1p+63))
     71         return 1;
     72     if (test__floatundidf(0x8000000000000001LL, 0x1p+63))
     73         return 1;
     74 
     75     if (test__floatundidf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50))
     76         return 1;
     77 
     78     if (test__floatundidf(0x0007FB72EA000000LL, 0x1.FEDCBA8p+50))
     79         return 1;
     80     if (test__floatundidf(0x0007FB72EB000000LL, 0x1.FEDCBACp+50))
     81         return 1;
     82     if (test__floatundidf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAFFFFFFCp+50))
     83         return 1;
     84     if (test__floatundidf(0x0007FB72EC000000LL, 0x1.FEDCBBp+50))
     85         return 1;
     86     if (test__floatundidf(0x0007FB72E8000001LL, 0x1.FEDCBA0000004p+50))
     87         return 1;
     88 
     89     if (test__floatundidf(0x0007FB72E6000000LL, 0x1.FEDCB98p+50))
     90         return 1;
     91     if (test__floatundidf(0x0007FB72E7000000LL, 0x1.FEDCB9Cp+50))
     92         return 1;
     93     if (test__floatundidf(0x0007FB72E7FFFFFFLL, 0x1.FEDCB9FFFFFFCp+50))
     94         return 1;
     95     if (test__floatundidf(0x0007FB72E4000001LL, 0x1.FEDCB90000004p+50))
     96         return 1;
     97     if (test__floatundidf(0x0007FB72E4000000LL, 0x1.FEDCB9p+50))
     98         return 1;
     99 
    100     if (test__floatundidf(0x023479FD0E092DC0LL, 0x1.1A3CFE870496Ep+57))
    101         return 1;
    102     if (test__floatundidf(0x023479FD0E092DA1LL, 0x1.1A3CFE870496Dp+57))
    103         return 1;
    104     if (test__floatundidf(0x023479FD0E092DB0LL, 0x1.1A3CFE870496Ep+57))
    105         return 1;
    106     if (test__floatundidf(0x023479FD0E092DB8LL, 0x1.1A3CFE870496Ep+57))
    107         return 1;
    108     if (test__floatundidf(0x023479FD0E092DB6LL, 0x1.1A3CFE870496Ep+57))
    109         return 1;
    110     if (test__floatundidf(0x023479FD0E092DBFLL, 0x1.1A3CFE870496Ep+57))
    111         return 1;
    112     if (test__floatundidf(0x023479FD0E092DC1LL, 0x1.1A3CFE870496Ep+57))
    113         return 1;
    114     if (test__floatundidf(0x023479FD0E092DC7LL, 0x1.1A3CFE870496Ep+57))
    115         return 1;
    116     if (test__floatundidf(0x023479FD0E092DC8LL, 0x1.1A3CFE870496Ep+57))
    117         return 1;
    118     if (test__floatundidf(0x023479FD0E092DCFLL, 0x1.1A3CFE870496Ep+57))
    119         return 1;
    120     if (test__floatundidf(0x023479FD0E092DD0LL, 0x1.1A3CFE870496Ep+57))
    121         return 1;
    122     if (test__floatundidf(0x023479FD0E092DD1LL, 0x1.1A3CFE870496Fp+57))
    123         return 1;
    124     if (test__floatundidf(0x023479FD0E092DD8LL, 0x1.1A3CFE870496Fp+57))
    125         return 1;
    126     if (test__floatundidf(0x023479FD0E092DDFLL, 0x1.1A3CFE870496Fp+57))
    127         return 1;
    128     if (test__floatundidf(0x023479FD0E092DE0LL, 0x1.1A3CFE870496Fp+57))
    129         return 1;
    130 
    131    return 0;
    132 }
    133