path: root/math/test-fenv.c

/* Copyright (C) 1997-2025 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

/* Tests for ISO C99 7.6: Floating-point environment  */

#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif

#include <complex.h>
#include <math.h>
#include <float.h>
#include <fenv.h>

#include <errno.h>
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/wait.h>
#include <sys/resource.h>
#include <math-tests.h>

/*
  Since not all architectures might define all exceptions, we define
  a private set and map accordingly.
*/
#define NO_EXC 0
#define INEXACT_EXC 0x1
#define DIVBYZERO_EXC 0x2
#define UNDERFLOW_EXC 0x04
#define OVERFLOW_EXC 0x08
#define INVALID_EXC 0x10
#define ALL_EXC \
        (INEXACT_EXC | DIVBYZERO_EXC | UNDERFLOW_EXC | OVERFLOW_EXC \
         | INVALID_EXC)

static int count_errors;

#if FE_ALL_EXCEPT
/* Test whether a given exception was raised.  */
static void
test_single_exception (short int exception,
                       short int exc_flag,
                       fexcept_t fe_flag,
                       const char *flag_name)
{
  if (exception & exc_flag)
    {
      if (fetestexcept (fe_flag))
        printf ("  Pass: Exception \"%s\" is set\n", flag_name);
      else
        {
          printf ("  Fail: Exception \"%s\" is not set\n", flag_name);
          ++count_errors;
        }
    }
  else
    {
      if (fetestexcept (fe_flag))
        {
          printf ("  Fail: Exception \"%s\" is set\n", flag_name);
          ++count_errors;
        }
      else
        {
          printf (