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104 lines
2.8 KiB
C
104 lines
2.8 KiB
C
/* Test of tracking of floating-point exceptions.
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Copyright (C) 2023-2026 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by Bruno Haible <bruno@clisp.org>, 2023. */
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#include <config.h>
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/* Specification. */
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#include <fenv.h>
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#include <stdio.h>
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#include "fpe-trapping.h"
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#include "macros.h"
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#if HAVE_FPE_TRAPPING
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/* Check that triggering a floating-point operation can trigger a trap. */
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int
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main (int argc, char *argv[])
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{
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/* Clear FE_INVALID exceptions from past operations. */
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feclearexcept (FE_INVALID);
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/* An FE_INVALID exception shall trigger a SIGFPE signal, which by default
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terminates the program. */
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if (sigfpe_on_invalid () < 0)
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{
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fputs ("Skipping test: trapping floating-point exceptions are not supported on this machine.\n", stderr);
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return 77;
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}
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if (argc > 1)
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switch (argv[1][0])
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{
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case 'f':
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{
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volatile float a, b;
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_GL_UNUSED volatile float c;
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a = 0; b = 0; c = a / b;
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}
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break;
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case 'd':
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{
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volatile double a, b;
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_GL_UNUSED volatile double c;
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a = 0; b = 0; c = a / b;
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}
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break;
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case 'l':
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/* This test does not work on Linux/loongarch64 with glibc 2.37.
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Likewise on Linux/alpha with glibc 2.7 on Linux 2.6.26.
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Likewise on FreeBSD 12.2/sparc, NetBSD 8.0/sparc, OpenBSD 7.2/sparc64.
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Likewise on OpenBSD 7.4/mips64.
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Cause unknown. */
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#if !((__GLIBC__ >= 2 && defined __loongarch__) \
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|| ((__GLIBC__ == 2 && __GLIBC_MINOR__ < 36) && defined __alpha) \
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|| ((defined __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__) && defined __sparc) \
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|| (defined __OpenBSD__ && defined __mips64))
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{
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volatile long double a, b;
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_GL_UNUSED volatile long double c;
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a = 0; b = 0; c = a / b;
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}
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#else
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fputs ("Skipping test: known failure on this platform\n", stderr);
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return 77;
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#endif
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break;
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default:
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break;
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}
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return test_exit_status;
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}
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#else
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int
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main ()
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{
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fputs ("Skipping test: feenableexcept not available\n", stderr);
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return 77;
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}
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#endif
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