compiler-rt/test/builtins/Unit/truncsfhf2_test.c

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_truncsfhf2
   3
   4 #include <stdio.h>
   5
   6 #include "fp_test.h"
   7
   8 TYPE_FP16 __truncsfhf2(float a);
   9
  10 int test__truncsfhf2(float a, uint16_t expected)
  11 {
  12     TYPE_FP16 x = __truncsfhf2(a);
  13     int ret = compareResultH(x, expected);
  14
  15     if (ret){
  16         printf("error in test__truncsfhf2(%f) = %#.4x, "
  17                "expected %#.4x\n", a, toRep16(x), expected);
  18     }
  19     return ret;
  20 }
  21
  22 char assumption_1[sizeof(TYPE_FP16) * CHAR_BIT == 16] = {0};
  23
  24 int main()
  25 {
  26     // qNaN
  27     if (test__truncsfhf2(makeQNaN32(),
  28                          UINT16_C(0x7e00)))
  29         return 1;
  30     // NaN
  31     if (test__truncsfhf2(makeNaN32(UINT32_C(0x8000)),
  32                          UINT16_C(0x7e00)))
  33         return 1;
  34     // inf
  35     if (test__truncsfhf2(makeInf32(),
  36                          UINT16_C(0x7c00)))
  37         return 1;
  38     if (test__truncsfhf2(-makeInf32(),
  39                          UINT16_C(0xfc00)))
  40         return 1;
  41     // zero
  42     if (test__truncsfhf2(0.0f, UINT16_C(0x0)))
  43         return 1;
  44     if (test__truncsfhf2(-0.0f, UINT16_C(0x8000)))
  45         return 1;
  46
  47     if (test__truncsfhf2(3.1415926535f,
  48                          UINT16_C(0x4248)))
  49         return 1;
  50     if (test__truncsfhf2(-3.1415926535f,
  51                          UINT16_C(0xc248)))
  52         return 1;
  53     if (test__truncsfhf2(0x1.987124876876324p+100f,
  54                          UINT16_C(0x7c00)))
  55         return 1;
  56     if (test__truncsfhf2(0x1.987124876876324p+12f,
  57                          UINT16_C(0x6e62)))
  58         return 1;
  59     if (test__truncsfhf2(0x1.0p+0f,
  60                          UINT16_C(0x3c00)))
  61         return 1;
  62     if (test__truncsfhf2(0x1.0p-14f,
  63                          UINT16_C(0x0400)))
  64         return 1;
  65     // denormal
  66     if (test__truncsfhf2(0x1.0p-20f,
  67                          UINT16_C(0x0010)))
  68         return 1;
  69     if (test__truncsfhf2(0x1.0p-24f,
  70                          UINT16_C(0x0001)))
  71         return 1;
  72     if (test__truncsfhf2(-0x1.0p-24f,
  73                          UINT16_C(0x8001)))
  74         return 1;
  75     if (test__truncsfhf2(0x1.5p-25f,
  76                          UINT16_C(0x0001)))
  77         return 1;
  78     // and back to zero
  79     if (test__truncsfhf2(0x1.0p-25f,
  80                          UINT16_C(0x0000)))
  81         return 1;
  82     if (test__truncsfhf2(-0x1.0p-25f,
  83                          UINT16_C(0x8000)))
  84         return 1;
  85     // max (precise)
  86     if (test__truncsfhf2(65504.0f,
  87                          UINT16_C(0x7bff)))
  88         return 1;
  89     // max (rounded)
  90     if (test__truncsfhf2(65519.0f,
  91                          UINT16_C(0x7bff)))
  92         return 1;
  93     // max (to +inf)
  94     if (test__truncsfhf2(65520.0f,
  95                          UINT16_C(0x7c00)))
  96         return 1;
  97     if (test__truncsfhf2(65536.0f,
  98                          UINT16_C(0x7c00)))
  99         return 1;
 100     if (test__truncsfhf2(-65520.0f,
 101                          UINT16_C(0xfc00)))
 102         return 1;
 103     return 0;
 104 }