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glibc/math/test-snan.c
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/* Test signaling NaNs in issignaling, isnan, isinf, and similar functions. | |
Copyright (C) 2008-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Andreas Jaeger <aj@suse.de>, 2005. | |
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/>. */ | |
#define _GNU_SOURCE 1 | |
#include <stdio.h> | |
#include <math.h> | |
#include <float.h> | |
#include <fenv.h> | |
#include <signal.h> | |
#include <setjmp.h> | |
#include <math-tests.h> | |
static sigjmp_buf sigfpe_buf; | |
static void | |
myFPsighandler (int signal) | |
{ | |
siglongjmp (sigfpe_buf, 1); | |
} | |
static int errors = 0; | |
#define CHECK(testname, expr) \ | |
do { \ | |
feclearexcept (FE_ALL_EXCEPT); \ | |
feenableexcept (FE_ALL_EXCEPT); \ | |
if (sigsetjmp (sigfpe_buf, 0)) \ | |
{ \ | |
printf ("%s raised SIGFPE\n", testname); \ | |
++errors; \ | |
} \ | |
else if (!(expr)) \ | |
{ \ | |
printf ("Failure: %s\n", testname); \ | |
++errors; \ | |
} \ | |
} while (0) | |
#define TEST_FUNC(NAME, FLOAT, SUFFIX) \ | |
static void \ | |
NAME (void) \ | |
{ \ | |
/* Variables are declared volatile to forbid some compiler \ | |
optimizations. */ \ | |
volatile FLOAT Inf_var, qNaN_var, zero_var, one_var; \ | |
/* A sNaN is only guaranteed to be representable in variables with */ \ | |
/* static (or thread-local) storage duration. */ \ | |
static volatile FLOAT sNaN_var = __builtin_nans ## SUFFIX (""); \ | |
static volatile FLOAT minus_sNaN_var = -__builtin_nans ## SUFFIX (""); \ | |
fenv_t saved_fenv; \ | |
\ | |
zero_var = 0.0; \ | |
one_var = 1.0; \ | |
qNaN_var = __builtin_nan ## SUFFIX (""); \ | |
Inf_var = one_var / zero_var; \ | |
\ | |
(void) &zero_var; \ | |
(void) &one_var; \ | |
(void) &qNaN_var; \ | |
(void) &sNaN_var; \ | |
(void) &minus_sNaN_var; \ | |
(void) &Inf_var; \ | |
\ | |
fegetenv (&saved_fenv); \ | |
\ | |
CHECK (#FLOAT " issignaling (qNaN)", !issignaling (qNaN_var)); \ | |
CHECK (#FLOAT " issignaling (-qNaN)", !issignaling (-qNaN_var)); \ | |
CHECK (#FLOAT " issignaling (sNaN)", \ | |
SNAN_TESTS (FLOAT) ? issignaling (sNaN_var) : 1); \ | |
CHECK (#FLOAT " issignaling (-sNaN)", \ | |
SNAN_TESTS (FLOAT) ? issignaling (minus_sNaN_var) : 1); \ | |
CHECK (#FLOAT " isnan (qNaN)", isnan (qNaN_var)); \ | |
CHECK (#FLOAT " isnan (-qNaN)", isnan (-qNaN_var)); \ | |
CHECK (#FLOAT " isnan (sNaN)", \ | |
SNAN_TESTS (FLOAT) ? isnan (sNaN_var) : 1); \ | |
CHECK (#FLOAT " isnan (-sNaN)", \ | |
SNAN_TESTS (FLOAT) ? isnan (minus_sNaN_var) : 1); \ | |
CHECK (#FLOAT " isinf (qNaN)", !isinf (qNaN_var)); \ | |
CHECK (#FLOAT " isinf (-qNaN)", !isinf (-qNaN_var)); \ | |
CHECK (#FLOAT " isinf (sNaN)", \ | |
SNAN_TESTS (FLOAT) ? !isinf (sNaN_var) : 1); \ | |
CHECK (#FLOAT " isinf (-sNaN)", \ | |
SNAN_TESTS (FLOAT) ? !isinf (minus_sNaN_var) : 1); \ | |
CHECK (#FLOAT " isfinite (qNaN)", !isfinite (qNaN_var)); \ | |
CHECK (#FLOAT " isfinite (-qNaN)", !isfinite (-qNaN_var)); \ | |
CHECK (#FLOAT " isfinite (sNaN)", \ | |
SNAN_TESTS (FLOAT) ? !isfinite (sNaN_var) : 1); \ | |
CHECK (#FLOAT " isfinite (-sNaN)", \ | |
SNAN_TESTS (FLOAT) ? !isfinite (minus_sNaN_var) : 1); \ | |
CHECK (#FLOAT " isnormal (qNaN)", !isnormal (qNaN_var)); \ | |
CHECK (#FLOAT " isnormal (-qNaN)", !isnormal (-qNaN_var)); \ | |
CHECK (#FLOAT " isnormal (sNaN)", \ | |
SNAN_TESTS (FLOAT) ? !isnormal (sNaN_var) : 1); \ | |
CHECK (#FLOAT " isnormal (-sNaN)", \ | |
SNAN_TESTS (FLOAT) ? !isnormal (minus_sNaN_var) : 1); \ | |
CHECK (#FLOAT " fpclassify (qNaN)", (fpclassify (qNaN_var)==FP_NAN)); \ | |
CHECK (#FLOAT " fpclassify (-qNaN)", (fpclassify (-qNaN_var)==FP_NAN)); \ | |
CHECK (#FLOAT " fpclassify (sNaN)", \ | |
SNAN_TESTS (FLOAT) ? fpclassify (sNaN_var) == FP_NAN : 1); \ | |
CHECK (#FLOAT " fpclassify (-sNaN)", \ | |
SNAN_TESTS (FLOAT) ? fpclassify (minus_sNaN_var) == FP_NAN : 1); \ | |
\ | |
fesetenv (&saved_fenv); /* restore saved fenv */ \ | |
} \ | |
TEST_FUNC (float_test, float, f) | |
TEST_FUNC (double_test, double, ) | |
#ifndef NO_LONG_DOUBLE | |
TEST_FUNC (ldouble_test, long double, l) | |
#endif | |
static int | |
do_test (void) | |
{ | |
signal (SIGFPE, &myFPsighandler); | |
float_test (); | |
double_test (); | |
#ifndef NO_LONG_DOUBLE | |
ldouble_test (); | |
#endif | |
return errors != 0; | |
} | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" |