2023-10-26 Bruno Haible <bruno@clisp.org>
+ fenv: Add tests.
+ * tests/test-fenv.c: New file.
+ * modules/fenv-tests: New file.
+
fenv: New module.
* lib/fenv.in.h: New file, based on glibc.
* m4/fenv_h.m4: New file.
--- /dev/null
+/* Test of <fenv.h> substitute.
+ Copyright (C) 2023 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 "verify.h"
+
+/* Check that the various FE_* macros are defined. */
+int r[] =
+ {
+#ifdef FE_DOWNWARD
+ FE_DOWNWARD,
+#endif
+#ifdef FE_UPWARD
+ FE_UPWARD,
+#endif
+#ifdef FE_TOWARDZERO
+ FE_TOWARDZERO,
+#endif
+ FE_TONEAREST
+ };
+int e[] = { FE_DIVBYZERO, FE_INEXACT, FE_INVALID, FE_OVERFLOW, FE_UNDERFLOW };
+
+/* Check that the types are all defined. */
+fenv_t t1;
+fexcept_t t2;
+
+/* On many platforms, other FE_* constants are included in FE_ALL_EXCEPT,
+ therefore in general
+ FE_ALL_EXCEPT == (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
+ does not hold. */
+verify (((FE_DIVBYZERO | FE_INEXACT | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
+ & ~FE_ALL_EXCEPT)
+ == 0);
+
+int
+main (void)
+{
+ /* Ensure no overlap in FE_*. */
+ switch (FE_INVALID)
+ {
+ case FE_DIVBYZERO:
+ case FE_INEXACT:
+ case FE_INVALID:
+ case FE_OVERFLOW:
+ case FE_UNDERFLOW:
+ ;
+ }
+
+ return 0;
+}