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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_floatunditf
   3
   4 #include "int_lib.h"
   5 #include <complex.h>
   6 #include <math.h>
   7 #include <stdio.h>
   8
   9 // The testcase currently assumes IEEE TF format, once that has been
  10 // fixed the defined(CRT_HAS_IEEE_TF) guard can be removed to enable it for
  11 // IBM 128 floats as well.
  12 #if defined(CRT_HAS_IEEE_TF)
  13
  14 #  include "fp_test.h"
  15
  16 // Returns: long integer converted to long double
  17
  18 COMPILER_RT_ABI tf_float __floatunditf(du_int a);
  19
  20 int test__floatunditf(du_int a, uint64_t expectedHi, uint64_t expectedLo) {
  21   tf_float x = __floatunditf(a);
  22   int ret = compareResultF128(x, expectedHi, expectedLo);
  23
  24   if (ret)
  25     printf("error in __floatunditf(%Lu) = %.20Lf, "
  26            "expected %.20Lf\n",
  27            a, x, fromRep128(expectedHi, expectedLo));
  28   return ret;
  29 }
  30
  31 char assumption_1[sizeof(long double) * CHAR_BIT == 128] = {0};
  32
  33 #endif
  34
  35 int main() {
  36 #if defined(CRT_HAS_IEEE_TF)
  37   if (test__floatunditf(0xffffffffffffffffULL, UINT64_C(0x403effffffffffff),
  38                         UINT64_C(0xfffe000000000000)))
  39     return 1;
  40   if (test__floatunditf(0xfffffffffffffffeULL, UINT64_C(0x403effffffffffff),
  41                         UINT64_C(0xfffc000000000000)))
  42     return 1;
  43   if (test__floatunditf(0x8000000000000000ULL, UINT64_C(0x403e000000000000),
  44                         UINT64_C(0x0)))
  45     return 1;
  46   if (test__floatunditf(0x7fffffffffffffffULL, UINT64_C(0x403dffffffffffff),
  47                         UINT64_C(0xfffc000000000000)))
  48     return 1;
  49   if (test__floatunditf(0x123456789abcdef1ULL, UINT64_C(0x403b23456789abcd),
  50                         UINT64_C(0xef10000000000000)))
  51     return 1;
  52   if (test__floatunditf(0x2ULL, UINT64_C(0x4000000000000000), UINT64_C(0x0)))
  53     return 1;
  54   if (test__floatunditf(0x1ULL, UINT64_C(0x3fff000000000000), UINT64_C(0x0)))
  55     return 1;
  56   if (test__floatunditf(0x0ULL, UINT64_C(0x0), UINT64_C(0x0)))
  57     return 1;
  58
  59 #else
  60   printf("skipped\n");
  61
  62 #endif
  63   return 0;
  64 }