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147 lines
5.5 KiB
C
147 lines
5.5 KiB
C
/* Test signaling NaNs in issignaling, isnan, isinf, and similar functions.
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Copyright (C) 2008-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#define _GNU_SOURCE 1
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#include <stdio.h>
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#include <math.h>
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#include <float.h>
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#include <fenv.h>
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#include <signal.h>
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#include <setjmp.h>
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#include <math-tests.h>
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#include <support/check.h>
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#ifdef __SUPPORT_SNAN__
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static sigjmp_buf sigfpe_buf;
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static void
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myFPsighandler (int signal)
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{
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siglongjmp (sigfpe_buf, 1);
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}
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static int errors = 0;
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#define CHECK(testname, expr) \
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do { \
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feclearexcept (FE_ALL_EXCEPT); \
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feenableexcept (FE_ALL_EXCEPT); \
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if (sigsetjmp (sigfpe_buf, 0)) \
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{ \
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printf ("%s raised SIGFPE\n", testname); \
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++errors; \
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} \
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else if (!(expr)) \
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{ \
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printf ("Failure: %s\n", testname); \
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++errors; \
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} \
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} while (0)
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#define TEST_FUNC(NAME, FLOAT, SUFFIX) \
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static void \
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NAME (void) \
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{ \
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/* Variables are declared volatile to forbid some compiler \
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optimizations. */ \
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volatile FLOAT Inf_var, qNaN_var, zero_var, one_var; \
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/* A sNaN is only guaranteed to be representable in variables with */ \
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/* static (or thread-local) storage duration. */ \
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static volatile FLOAT sNaN_var = __builtin_nans ## SUFFIX (""); \
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static volatile FLOAT minus_sNaN_var = -__builtin_nans ## SUFFIX (""); \
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fenv_t saved_fenv; \
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\
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zero_var = 0.0; \
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one_var = 1.0; \
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qNaN_var = __builtin_nan ## SUFFIX (""); \
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Inf_var = one_var / zero_var; \
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\
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(void) &zero_var; \
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(void) &one_var; \
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(void) &qNaN_var; \
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(void) &sNaN_var; \
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(void) &minus_sNaN_var; \
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(void) &Inf_var; \
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\
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fegetenv (&saved_fenv); \
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\
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CHECK (#FLOAT " issignaling (qNaN)", !issignaling (qNaN_var)); \
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CHECK (#FLOAT " issignaling (-qNaN)", !issignaling (-qNaN_var)); \
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CHECK (#FLOAT " issignaling (sNaN)", \
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SNAN_TESTS (FLOAT) ? issignaling (sNaN_var) : 1); \
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CHECK (#FLOAT " issignaling (-sNaN)", \
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SNAN_TESTS (FLOAT) ? issignaling (minus_sNaN_var) : 1); \
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CHECK (#FLOAT " isnan (qNaN)", isnan (qNaN_var)); \
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CHECK (#FLOAT " isnan (-qNaN)", isnan (-qNaN_var)); \
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CHECK (#FLOAT " isnan (sNaN)", \
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SNAN_TESTS (FLOAT) ? isnan (sNaN_var) : 1); \
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CHECK (#FLOAT " isnan (-sNaN)", \
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SNAN_TESTS (FLOAT) ? isnan (minus_sNaN_var) : 1); \
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CHECK (#FLOAT " isinf (qNaN)", !isinf (qNaN_var)); \
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CHECK (#FLOAT " isinf (-qNaN)", !isinf (-qNaN_var)); \
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CHECK (#FLOAT " isinf (sNaN)", \
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SNAN_TESTS (FLOAT) ? !isinf (sNaN_var) : 1); \
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CHECK (#FLOAT " isinf (-sNaN)", \
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SNAN_TESTS (FLOAT) ? !isinf (minus_sNaN_var) : 1); \
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CHECK (#FLOAT " isfinite (qNaN)", !isfinite (qNaN_var)); \
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CHECK (#FLOAT " isfinite (-qNaN)", !isfinite (-qNaN_var)); \
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CHECK (#FLOAT " isfinite (sNaN)", \
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SNAN_TESTS (FLOAT) ? !isfinite (sNaN_var) : 1); \
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CHECK (#FLOAT " isfinite (-sNaN)", \
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SNAN_TESTS (FLOAT) ? !isfinite (minus_sNaN_var) : 1); \
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CHECK (#FLOAT " isnormal (qNaN)", !isnormal (qNaN_var)); \
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CHECK (#FLOAT " isnormal (-qNaN)", !isnormal (-qNaN_var)); \
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CHECK (#FLOAT " isnormal (sNaN)", \
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SNAN_TESTS (FLOAT) ? !isnormal (sNaN_var) : 1); \
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CHECK (#FLOAT " isnormal (-sNaN)", \
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SNAN_TESTS (FLOAT) ? !isnormal (minus_sNaN_var) : 1); \
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CHECK (#FLOAT " fpclassify (qNaN)", (fpclassify (qNaN_var)==FP_NAN)); \
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CHECK (#FLOAT " fpclassify (-qNaN)", (fpclassify (-qNaN_var)==FP_NAN)); \
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CHECK (#FLOAT " fpclassify (sNaN)", \
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SNAN_TESTS (FLOAT) ? fpclassify (sNaN_var) == FP_NAN : 1); \
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CHECK (#FLOAT " fpclassify (-sNaN)", \
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SNAN_TESTS (FLOAT) ? fpclassify (minus_sNaN_var) == FP_NAN : 1); \
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\
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fesetenv (&saved_fenv); /* restore saved fenv */ \
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} \
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TEST_FUNC (float_test, float, f)
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TEST_FUNC (double_test, double, )
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TEST_FUNC (ldouble_test, long double, l)
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#endif
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static int
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do_test (void)
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{
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#ifdef __SUPPORT_SNAN__
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signal (SIGFPE, &myFPsighandler);
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float_test ();
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double_test ();
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ldouble_test ();
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return errors != 0;
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#else
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FAIL_UNSUPPORTED ("compiler does not support -fsignaling-nans");
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#endif
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}
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#include <support/test-driver.c>
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