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      1 //===--------------- truncdfhf2_test.c - Test __truncdfhf2 ----------------===//
      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 __truncdfhf2 for the compiler_rt library.
     11 //
     12 //===----------------------------------------------------------------------===//
     13 
     14 #include <stdio.h>
     15 
     16 #include "fp_test.h"
     17 
     18 uint16_t __truncdfhf2(double a);
     19 
     20 int test__truncdfhf2(double a, uint16_t expected)
     21 {
     22     uint16_t x = __truncdfhf2(a);
     23     int ret = compareResultH(x, expected);
     24 
     25     if (ret){
     26         printf("error in test__truncdfhf2(%f) = %#.4x, "
     27                "expected %#.4x\n", a, x, fromRep16(expected));
     28     }
     29     return ret;
     30 }
     31 
     32 char assumption_1[sizeof(__fp16) * CHAR_BIT == 16] = {0};
     33 
     34 int main()
     35 {
     36     // qNaN
     37     if (test__truncdfhf2(makeQNaN64(),
     38                          UINT16_C(0x7e00)))
     39         return 1;
     40     // NaN
     41     if (test__truncdfhf2(makeNaN64(UINT64_C(0x8000)),
     42                          UINT16_C(0x7e00)))
     43         return 1;
     44     // inf
     45     if (test__truncdfhf2(makeInf64(),
     46                          UINT16_C(0x7c00)))
     47         return 1;
     48     if (test__truncdfhf2(-makeInf64(),
     49                          UINT16_C(0xfc00)))
     50         return 1;
     51     // zero
     52     if (test__truncdfhf2(0.0, UINT16_C(0x0)))
     53         return 1;
     54     if (test__truncdfhf2(-0.0, UINT16_C(0x8000)))
     55         return 1;
     56 
     57     if (test__truncdfhf2(3.1415926535,
     58                          UINT16_C(0x4248)))
     59         return 1;
     60     if (test__truncdfhf2(-3.1415926535,
     61                          UINT16_C(0xc248)))
     62         return 1;
     63     if (test__truncdfhf2(0x1.987124876876324p+1000,
     64                          UINT16_C(0x7c00)))
     65         return 1;
     66     if (test__truncdfhf2(0x1.987124876876324p+12,
     67                          UINT16_C(0x6e62)))
     68         return 1;
     69     if (test__truncdfhf2(0x1.0p+0,
     70                          UINT16_C(0x3c00)))
     71         return 1;
     72     if (test__truncdfhf2(0x1.0p-14,
     73                          UINT16_C(0x0400)))
     74         return 1;
     75     // denormal
     76     if (test__truncdfhf2(0x1.0p-20,
     77                          UINT16_C(0x0010)))
     78         return 1;
     79     if (test__truncdfhf2(0x1.0p-24,
     80                          UINT16_C(0x0001)))
     81         return 1;
     82     if (test__truncdfhf2(-0x1.0p-24,
     83                          UINT16_C(0x8001)))
     84         return 1;
     85     if (test__truncdfhf2(0x1.5p-25,
     86                          UINT16_C(0x0001)))
     87         return 1;
     88     // and back to zero
     89     if (test__truncdfhf2(0x1.0p-25,
     90                          UINT16_C(0x0000)))
     91         return 1;
     92     if (test__truncdfhf2(-0x1.0p-25,
     93                          UINT16_C(0x8000)))
     94         return 1;
     95     // max (precise)
     96     if (test__truncdfhf2(65504.0,
     97                          UINT16_C(0x7bff)))
     98         return 1;
     99     // max (rounded)
    100     if (test__truncdfhf2(65519.0,
    101                          UINT16_C(0x7bff)))
    102         return 1;
    103     // max (to +inf)
    104     if (test__truncdfhf2(65520.0,
    105                          UINT16_C(0x7c00)))
    106         return 1;
    107     if (test__truncdfhf2(-65520.0,
    108                          UINT16_C(0xfc00)))
    109         return 1;
    110     if (test__truncdfhf2(65536.0,
    111                          UINT16_C(0x7c00)))
    112         return 1;
    113     return 0;
    114 }
    115