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glibc/math/test-snan.c
Thomas Schwinge 572676160d New <math.h> macro named issignaling to check for a signaling NaN (sNaN). 
It is based on draft TS 18661 and currently enabled as a GNU extension.
2013-04-02 13:51:02 +02:00

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/* Test signaling NaNs in issignaling, isnan, isinf, and similar functions.
Copyright (C) 2008-2013 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 <stdlib.h>
#include <sys/time.h>
#include <string.h>
#include <math.h>
#include <float.h>
#include <fenv.h>
#include <signal.h>
#include <setjmp.h>
#include <errno.h>
#include <math-tests.h>
int dest_offset;
char *dest_address;
double value = 123.456;
double zero = 0.0;
static sigjmp_buf sigfpe_buf;
typedef long double ldouble;
void
myFPsighandler(int signal,
siginfo_t *info,
void *context)
{
siglongjmp(sigfpe_buf, 0);
}
int
set_sigaction_FP(void)
{
struct sigaction sa;
/* register RT signal handler via sigaction */
sa.sa_flags = SA_SIGINFO;
sa.sa_sigaction = &myFPsighandler;
sigemptyset(&sa.sa_mask);
sigaction(SIGFPE, &sa, NULL);
return 0;
}
int
remove_sigaction_FP(void)
{
struct sigaction sa;
/* restore default RT signal handler via sigaction */
sa.sa_flags = SA_SIGINFO;
sa.sa_handler = SIG_DFL;
sigemptyset(&sa.sa_mask);
sigaction(SIGFPE, &sa, NULL);
return 0;
}
static int errors = 0;
static void
check (const char *testname, int result)
{
if (!result) {
printf ("Failure: %s\n", testname);
errors++;
}
}
#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; \
\
set_sigaction_FP (); \
fegetenv(&saved_fenv); \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " issignaling (qNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " issignaling (qNaN)", !issignaling (qNaN_var)); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " issignaling (-qNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " issignaling (-qNaN)", !issignaling (-qNaN_var)); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " issignaling (sNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " issignaling (sNaN)", \
SNAN_TESTS (FLOAT) ? issignaling (sNaN_var) : 1); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " issignaling (-sNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " issignaling (-sNaN)", \
SNAN_TESTS (FLOAT) ? issignaling (minus_sNaN_var) : 1); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " isnan (qNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " isnan (qNaN)", isnan (qNaN_var)); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " isnan (-qNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " isnan (-qNaN)", isnan (-qNaN_var)); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " isnan (sNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " isnan (sNaN)", \
SNAN_TESTS (FLOAT) ? isnan (sNaN_var) : 1); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " isnan (-sNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " isnan (-sNaN)", \
SNAN_TESTS (FLOAT) ? isnan (minus_sNaN_var) : 1); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " isinf (qNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " isinf (qNaN)", !isinf (qNaN_var)); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " isinf (-qNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " isinf (-qNaN)", !isinf (-qNaN_var)); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " isinf (sNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " isinf (sNaN)", \
SNAN_TESTS (FLOAT) ? !isinf (sNaN_var) : 1); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " isinf (-sNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " isinf (-sNaN)", \
SNAN_TESTS (FLOAT) ? !isinf (minus_sNaN_var) : 1); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " isfinite (qNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " isfinite (qNaN)", !isfinite (qNaN_var)); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " isfinite (-qNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " isfinite (-qNaN)", !isfinite (-qNaN_var)); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " isfinite (sNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " isfinite (sNaN)", \
SNAN_TESTS (FLOAT) ? !isfinite (sNaN_var) : 1); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " isfinite (-sNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " isfinite (-sNaN)", \
SNAN_TESTS (FLOAT) ? !isfinite (minus_sNaN_var) : 1); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " isnormal (qNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " isnormal (qNaN)", !isnormal (qNaN_var)); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " isnormal (-qNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " isnormal (-qNaN)", !isnormal (-qNaN_var)); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " isnormal (sNaN) isnormal SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " isnormal (sNaN)", \
SNAN_TESTS (FLOAT) ? !isnormal (sNaN_var) : 1); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " isnormal (-sNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " isnormal (-sNaN)", \
SNAN_TESTS (FLOAT) ? !isnormal (minus_sNaN_var) : 1); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " fpclassify (qNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " fpclassify (qNaN)", (fpclassify (qNaN_var)==FP_NAN)); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " fpclassify (-qNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " fpclassify (-qNaN)", (fpclassify (-qNaN_var)==FP_NAN)); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " fpclassify (sNaN) isnormal SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " fpclassify (sNaN)", \
SNAN_TESTS (FLOAT) ? fpclassify (sNaN_var) == FP_NAN : 1); \
} \
\
feclearexcept(FE_ALL_EXCEPT); \
feenableexcept (FE_ALL_EXCEPT); \
if (sigsetjmp(sigfpe_buf, 0)) \
{ \
printf (#FLOAT " fpclassify (-sNaN) raised SIGFPE\n"); \
errors++; \
} else { \
check (#FLOAT " fpclassify (-sNaN)", \
SNAN_TESTS (FLOAT) ? fpclassify (minus_sNaN_var) == FP_NAN : 1); \
} \
\
fesetenv(&saved_fenv); /* restore saved fenv */ \
remove_sigaction_FP(); \
}
TEST_FUNC (float_test, float, f)
TEST_FUNC (double_test, double, )
#ifndef NO_LONG_DOUBLE
TEST_FUNC (ldouble_test, ldouble, l)
#endif
static int
do_test (void)
{
float_test();
double_test();
#ifndef NO_LONG_DOUBLE
ldouble_test();
#endif
return errors != 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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