1  /* Test nearbyint functions do not disable exception traps (bug 19228).
       2     Copyright (C) 2015-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <fenv.h>
      20  #include <math.h>
      21  #include <stdio.h>
      22  
      23  #ifndef FE_INEXACT
      24  # define FE_INEXACT 0
      25  #endif
      26  
      27  #define TEST_FUNC(NAME, FLOAT, SUFFIX)					\
      28  static int								\
      29  NAME (void)								\
      30  {									\
      31    int result = 0;							\
      32    volatile FLOAT a, b __attribute__ ((unused));				\
      33    a = 1.5;								\
      34    /* nearbyint must work when traps on "inexact" are enabled.  */	\
      35    b = nearbyint ## SUFFIX (a);						\
      36    /* And it must have left those traps enabled.  */			\
      37    if (fegetexcept () == FE_INEXACT)					\
      38      puts ("PASS: " #FLOAT);						\
      39    else									\
      40      {									\
      41        puts ("FAIL: " #FLOAT);						\
      42        result = 1;							\
      43      }									\
      44    return result;							\
      45  }
      46  
      47  TEST_FUNC (float_test, float, f)
      48  TEST_FUNC (double_test, double, )
      49  TEST_FUNC (ldouble_test, long double, l)
      50  
      51  static int
      52  do_test (void)
      53  {
      54    if (feenableexcept (FE_INEXACT) == -1)
      55      {
      56        puts ("enabling FE_INEXACT traps failed, cannot test");
      57        return 77;
      58      }
      59    int result = float_test ();
      60    feenableexcept (FE_INEXACT);
      61    result |= double_test ();
      62    feenableexcept (FE_INEXACT);
      63    result |= ldouble_test ();
      64    return result;
      65  }
      66  
      67  #define TEST_FUNCTION do_test ()
      68  #include "../test-skeleton.c"