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106 lines
2.7 KiB
C
106 lines
2.7 KiB
C
/* Test that setjmp/longjmp do not save and restore floating-point
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exceptions and rounding modes.
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Copyright (C) 2013-2020 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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#include <fenv.h>
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#include <setjmp.h>
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#include <stdio.h>
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#include <stdlib.h>
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static jmp_buf __attribute__ ((unused)) env;
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static int result = 0;
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#if defined FE_TONEAREST && defined FE_TOWARDZERO
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static int expected_rounding_mode = FE_TONEAREST;
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static void
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change_rounding_mode (void)
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{
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if (fesetround (FE_TOWARDZERO) == 0)
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expected_rounding_mode = FE_TOWARDZERO;
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else
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puts ("fesetround (FE_TOWARDZERO) failed, continuing test");
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longjmp (env, 1);
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}
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#endif
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#ifdef FE_INVALID
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static int expected_exceptions = 0;
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static void
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raise_exception (void)
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{
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if (feraiseexcept (FE_INVALID) == 0)
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expected_exceptions = FE_INVALID;
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else
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puts ("feraiseexcept (FE_INVALID) failed, continuing test");
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longjmp (env, 1);
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}
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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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#if defined FE_TONEAREST && defined FE_TOWARDZERO
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if (fesetround (FE_TONEAREST) == 0)
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{
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if (setjmp (env) == 0)
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change_rounding_mode ();
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else
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{
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if (fegetround () == expected_rounding_mode)
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puts ("PASS: longjmp preserved rounding mode");
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else
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{
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puts ("FAIL: longjmp changed rounding mode");
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result = 1;
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}
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}
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}
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else
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puts ("fesetround (FE_TONEAREST) failed, not testing rounding modes");
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#else
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puts ("rounding mode test not supported");
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#endif
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#ifdef FE_INVALID
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if (feclearexcept (FE_ALL_EXCEPT) == 0)
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{
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if (setjmp (env) == 0)
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raise_exception ();
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else
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{
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if (fetestexcept (FE_INVALID) == expected_exceptions)
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puts ("PASS: longjmp preserved exceptions");
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else
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{
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puts ("FAIL: longjmp changed exceptions");
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result = 1;
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}
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}
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}
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else
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puts ("feclearexcept (FE_ALL_EXCEPT) failed, not testing exceptions");
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#else
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puts ("exception test not supported");
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#endif
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return result;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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