Permalink
Cannot retrieve contributors at this time
Name already in use
A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
glibc/setjmp/tst-setjmp-fp.c
Go to fileThis commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
105 lines (94 sloc)
2.66 KB
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* Test that setjmp/longjmp do not save and restore floating-point | |
exceptions and rounding modes. | |
Copyright (C) 2013-2016 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 __attribute__ ((unused)) 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" |