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Diffstat (limited to 'test/math/test-snan.c')
| -rw-r--r-- | test/math/test-snan.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/test/math/test-snan.c b/test/math/test-snan.c new file mode 100644 index 0000000..b1f6dad --- /dev/null +++ b/test/math/test-snan.c @@ -0,0 +1,153 @@ +/* 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> +#if __UCLIBC_HAS_FENV__ +#include <fenv.h> +#endif +#include <signal.h> +#include <setjmp.h> + +#include "math-tests.h" + +#if __UCLIBC_HAS_FENV__ + +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 +#endif + +static int +do_test (void) +{ +#if __UCLIBC_HAS_FENV__ + signal (SIGFPE, &myFPsighandler); + + float_test (); + double_test (); +#ifndef NO_LONG_DOUBLE + ldouble_test (); +#endif + + return errors != 0; +#else + return 23; +#endif +} + +#define TEST_FUNCTION do_test () +#include "../test-skeleton.c" |