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Date :
2025-01-01T09:24:36
maint: run 'make update-copyright'
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/* Test of tracking of floating-point exceptions.
Copyright (C) 2023-2025 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2023. */
#include <config.h>
/* Specification. */
#include <fenv.h>
#include <stdio.h>
#include "fpe-trapping.h"
#include "macros.h"
#if HAVE_FPE_TRAPPING
/* Check that triggering a floating-point operation can trigger a trap. */
int
main (int argc, char *argv[])
{
/* Clear FE_INVALID exceptions from past operations. */
feclearexcept (FE_INVALID);
/* An FE_INVALID exception shall trigger a SIGFPE signal, which by default
terminates the program. */
if (sigfpe_on_invalid () < 0)
{
fputs ("Skipping test: trapping floating-point exceptions are not supported on this machine.\n", stderr);
return 77;
}
if (argc > 1)
switch (argv[1][0])
{
case 'f':
{
volatile float a, b;
_GL_UNUSED volatile float c;
a = 0; b = 0; c = a / b;
}
break;
case 'd':
{
volatile double a, b;
_GL_UNUSED volatile double c;
a = 0; b = 0; c = a / b;
}
break;
case 'l':
/* This test does not work on Linux/loongarch64 with glibc 2.37.
Likewise on Linux/alpha with glibc 2.7 on Linux 2.6.26.
Likewise on FreeBSD 12.2/sparc, NetBSD 8.0/sparc, OpenBSD 7.2/sparc64.
Likewise on OpenBSD 7.4/mips64.
Cause unknown. */
#if !((__GLIBC__ >= 2 && defined __loongarch__) \
|| ((__GLIBC__ == 2 && __GLIBC_MINOR__ < 36) && defined __alpha) \
|| ((defined __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__) && defined __sparc) \
|| (defined __OpenBSD__ && defined __mips64))
{
volatile long double a, b;
_GL_UNUSED volatile long double c;
a = 0; b = 0; c = a / b;
}
#else
fputs ("Skipping test: known failure on this platform\n", stderr);
return 77;
#endif
break;
default:
break;
}
return test_exit_status;
}
#else
int
main ()
{
fputs ("Skipping test: feenableexcept not available\n", stderr);
return 77;
}
#endif