| /* Test that setjmp/longjmp do not save and restore floating-point |
| exceptions and rounding modes. |
| Copyright (C) 2013-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| 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/>. */ |
| |
| #include <fenv.h> |
| #include <setjmp.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| static jmp_buf env; |
| static int result = 0; |
| |
| #if defined FE_TONEAREST && defined FE_TOWARDZERO |
| static int expected_rounding_mode = FE_TONEAREST; |
| |
| static void |
| change_rounding_mode (void) |
| { |
| if (fesetround (FE_TOWARDZERO) == 0) |
| expected_rounding_mode = FE_TOWARDZERO; |
| else |
| puts ("fesetround (FE_TOWARDZERO) failed, continuing test"); |
| longjmp (env, 1); |
| } |
| #endif |
| |
| #ifdef FE_INVALID |
| static int expected_exceptions = 0; |
| |
| static void |
| raise_exception (void) |
| { |
| if (feraiseexcept (FE_INVALID) == 0) |
| expected_exceptions = FE_INVALID; |
| else |
| puts ("feraiseexcept (FE_INVALID) failed, continuing test"); |
| longjmp (env, 1); |
| } |
| #endif |
| |
| static int |
| do_test (void) |
| { |
| #if defined FE_TONEAREST && defined FE_TOWARDZERO |
| if (fesetround (FE_TONEAREST) == 0) |
| { |
| if (setjmp (env) == 0) |
| change_rounding_mode (); |
| else |
| { |
| if (fegetround () == expected_rounding_mode) |
| puts ("PASS: longjmp preserved rounding mode"); |
| else |
| { |
| puts ("FAIL: longjmp changed rounding mode"); |
| result = 1; |
| } |
| } |
| } |
| else |
| puts ("fesetround (FE_TONEAREST) failed, not testing rounding modes"); |
| #else |
| puts ("rounding mode test not supported"); |
| #endif |
| #ifdef FE_INVALID |
| if (feclearexcept (FE_ALL_EXCEPT) == 0) |
| { |
| if (setjmp (env) == 0) |
| raise_exception (); |
| else |
| { |
| if (fetestexcept (FE_INVALID) == expected_exceptions) |
| puts ("PASS: longjmp preserved exceptions"); |
| else |
| { |
| puts ("FAIL: longjmp changed exceptions"); |
| result = 1; |
| } |
| } |
| } |
| else |
| puts ("feclearexcept (FE_ALL_EXCEPT) failed, not testing exceptions"); |
| #else |
| puts ("exception test not supported"); |
| #endif |
| return result; |
| } |
| |
| #define TEST_FUNCTION do_test () |
| #include "../test-skeleton.c" |
