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glibc/math/test-fenvinline.c

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/* Test for fenv inline implementations.
Copyright (C) 2015-2018 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
<http://www.gnu.org/licenses/>. */
#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
/* To make sure the fenv inline function are used. */
#undef __NO_MATH_INLINES
#include <fenv.h>
#include <stdio.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
static void
test_single_exception_fp_int (int exception,
int exc_flag,
int 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 (" Pass: Exception \"%s\" is not set\n", flag_name);
}
}
/* Test whether a given exception was raised. */
static void
test_single_exception_fp_double (int exception,
int exc_flag,
double 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 (" Pass: Exception \"%s\" is not set\n", flag_name);
}
}
#endif
static void
test_exceptions (const char *test_name, int exception)
{
printf ("Test: %s\n", test_name);
#ifdef FE_DIVBYZERO
test_single_exception_fp_double (exception, DIVBYZERO_EXC, FE_DIVBYZERO,
"DIVBYZERO");
#endif
#ifdef FE_INVALID
test_single_exception_fp_double (exception, INVALID_EXC, FE_INVALID,
"INVALID");
#endif
#ifdef FE_INEXACT
test_single_exception_fp_double (exception, INEXACT_EXC, FE_INEXACT,
"INEXACT");
#endif
#ifdef FE_UNDERFLOW
test_single_exception_fp_double (exception, UNDERFLOW_EXC, FE_UNDERFLOW,
"UNDERFLOW");
#endif
#ifdef FE_OVERFLOW
test_single_exception_fp_double (exception, OVERFLOW_EXC, FE_OVERFLOW,
"OVERFLOW");
#endif
}
static void
test_exceptionflag (void)
{
printf ("Test: fegetexceptionflag (FE_ALL_EXCEPT)\n");
#if FE_ALL_EXCEPT
fexcept_t excepts;
feclearexcept (FE_ALL_EXCEPT);
feraiseexcept (FE_INVALID);
fegetexceptflag (&excepts, FE_ALL_EXCEPT);
feclearexcept (FE_ALL_EXCEPT);
feraiseexcept (FE_OVERFLOW | FE_INEXACT);
fesetexceptflag (&excepts, FE_ALL_EXCEPT);
test_single_exception_fp_int (INVALID_EXC, INVALID_EXC, FE_INVALID,
"INVALID (int)");
test_single_exception_fp_int (INVALID_EXC, OVERFLOW_EXC, FE_OVERFLOW,
"OVERFLOW (int)");
test_single_exception_fp_int (INVALID_EXC, INEXACT_EXC, FE_INEXACT,
"INEXACT (int)");
/* Same test, but using double as argument */
feclearexcept (FE_ALL_EXCEPT);
feraiseexcept (FE_INVALID);
fegetexceptflag (&excepts, (double)FE_ALL_EXCEPT);
feclearexcept (FE_ALL_EXCEPT);
feraiseexcept (FE_OVERFLOW | FE_INEXACT);
fesetexceptflag (&excepts, (double)FE_ALL_EXCEPT);
test_single_exception_fp_double (INVALID_EXC, INVALID_EXC, FE_INVALID,
"INVALID (double)");
test_single_exception_fp_double (INVALID_EXC, OVERFLOW_EXC, FE_OVERFLOW,
"OVERFLOW (double)");
test_single_exception_fp_double (INVALID_EXC, INEXACT_EXC, FE_INEXACT,
"INEXACT (double)");
#endif
}
static void
test_fesetround (void)
{
#if defined FE_TONEAREST && defined FE_TOWARDZERO
int res1;
int res2;
printf ("Tests for fesetround\n");
/* The fesetround should not itself cause the test to fail, however it
should either succeed for both 'int' and 'double' argument, or fail
for both. */
res1 = fesetround ((int) FE_TOWARDZERO);
res2 = fesetround ((double) FE_TOWARDZERO);
if (res1 != res2)
{
printf ("fesetround (FE_TOWARDZERO) failed: %d, %d\n", res1, res2);
++count_errors;
}
res1 = fesetround ((int) FE_TONEAREST);
res2 = fesetround ((double) FE_TONEAREST);
if (res1 != res2)
{
printf ("fesetround (FE_TONEAREST) failed: %d, %d\n", res1, res2);
++count_errors;
}
#endif
}
#if FE_ALL_EXCEPT
/* Tests for feenableexcept/fedisableexcept. */
static void
feenable_test (const char *flag_name, fexcept_t fe_exc)
{
int fe_exci = fe_exc;
double fe_excd = fe_exc;
int excepts;
/* First disable all exceptions. */
if (fedisableexcept (FE_ALL_EXCEPT) == -1)
{
printf ("Test: fedisableexcept (FE_ALL_EXCEPT) failed\n");
++count_errors;
/* If this fails, the other tests don't make sense. */
return;
}
/* Test for inline macros using integer argument. */
excepts = feenableexcept (fe_exci);
if (!EXCEPTION_ENABLE_SUPPORTED (fe_exci) && excepts == -1)
{
printf ("Test: not testing feenableexcept, it isn't implemented.\n");
return;
}
if (excepts == -1)
{
printf ("Test: feenableexcept (%s) failed\n", flag_name);
++count_errors;
return;
}
if (excepts != 0)
{
printf ("Test: feenableexcept (%s) failed, return should be 0, is %x\n",
flag_name, excepts);
++count_errors;
}
/* And now disable the exception again. */
excepts = fedisableexcept (fe_exc);
if (excepts == -1)
{
printf ("Test: fedisableexcept (%s) failed\n", flag_name);
++count_errors;
return;
}
if (excepts != fe_exc)
{
printf ("Test: fedisableexcept (%s) failed, return should be 0x%x, is 0x%x\n",
flag_name, (unsigned int)fe_exc, excepts);
++count_errors;
}
/* Test for inline macros using double argument. */
excepts = feenableexcept (fe_excd);
if (!EXCEPTION_ENABLE_SUPPORTED (fe_excd) && excepts == -1)
{
printf ("Test: not testing feenableexcept, it isn't implemented.\n");
return;
}
if (excepts == -1)
{
printf ("Test: feenableexcept (%s) failed\n", flag_name);
++count_errors;
return;
}
if (excepts != 0)
{
printf ("Test: feenableexcept (%s) failed, return should be 0, is %x\n",
flag_name, excepts);
++count_errors;
}
/* And now disable the exception again. */
excepts = fedisableexcept (fe_exc);
if (excepts == -1)
{
printf ("Test: fedisableexcept (%s) failed\n", flag_name);
++count_errors;
return;
}
if (excepts != fe_exc)
{
printf ("Test: fedisableexcept (%s) failed, return should be 0x%x, is 0x%x\n",
flag_name, (unsigned int)fe_exc, excepts);
++count_errors;
}
}
#endif
static void
test_feenabledisable (void)
{
printf ("Tests for feenableexcepts/fedisableexcept\n");
/* We might have some exceptions still set. */
feclearexcept (FE_ALL_EXCEPT);
#ifdef FE_DIVBYZERO
feenable_test ("FE_DIVBYZERO", FE_DIVBYZERO);
#endif
#ifdef FE_INVALID
feenable_test ("FE_INVALID", FE_INVALID);
#endif
#ifdef FE_INEXACT
feenable_test ("FE_INEXACT", FE_INEXACT);
#endif
#ifdef FE_UNDERFLOW
feenable_test ("FE_UNDERFLOW", FE_UNDERFLOW);
#endif
#ifdef FE_OVERFLOW
feenable_test ("FE_OVERFLOW", FE_OVERFLOW);
#endif
fesetenv (FE_DFL_ENV);
}
static int
do_test (void)
{
/* clear all exceptions and test if all are cleared */
feclearexcept (FE_ALL_EXCEPT);
test_exceptions ("feclearexcept (FE_ALL_EXCEPT) clears all exceptions",
NO_EXC);
/* raise all exceptions and test if all are raised */
feraiseexcept (FE_ALL_EXCEPT);
if (EXCEPTION_TESTS (float))
test_exceptions ("feraiseexcept (FE_ALL_EXCEPT) raises all exceptions",
ALL_EXC);
/* Same test, but using double as argument */
feclearexcept ((double)FE_ALL_EXCEPT);
test_exceptions ("feclearexcept ((double)FE_ALL_EXCEPT) clears all exceptions",
NO_EXC);
feraiseexcept ((double)FE_ALL_EXCEPT);
if (EXCEPTION_TESTS (float))
test_exceptions ("feraiseexcept ((double)FE_ALL_EXCEPT) raises all exceptions",
ALL_EXC);
if (EXCEPTION_TESTS (float))
test_exceptionflag ();
test_fesetround ();
test_feenabledisable ();
return count_errors;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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