summaryrefslogtreecommitdiff
path: root/tests/test-isnanf.h
diff options
context:
space:
mode:
Diffstat (limited to 'tests/test-isnanf.h')
-rw-r--r--tests/test-isnanf.h80
1 files changed, 80 insertions, 0 deletions
diff --git a/tests/test-isnanf.h b/tests/test-isnanf.h
new file mode 100644
index 0000000..f3f387c
--- /dev/null
+++ b/tests/test-isnanf.h
@@ -0,0 +1,80 @@
+/* Test of isnanf() substitute.
+ Copyright (C) 2007-2008 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 <http://www.gnu.org/licenses/>. */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007. */
+
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "nan.h"
+
+#define ASSERT(expr) \
+ do \
+ { \
+ if (!(expr)) \
+ { \
+ fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
+ fflush (stderr); \
+ abort (); \
+ } \
+ } \
+ while (0)
+
+/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0f.
+ So we use -zero instead. */
+float zero = 0.0f;
+
+int
+main ()
+{
+ /* Finite values. */
+ ASSERT (!isnanf (3.141f));
+ ASSERT (!isnanf (3.141e30f));
+ ASSERT (!isnanf (3.141e-30f));
+ ASSERT (!isnanf (-2.718f));
+ ASSERT (!isnanf (-2.718e30f));
+ ASSERT (!isnanf (-2.718e-30f));
+ ASSERT (!isnanf (0.0f));
+ ASSERT (!isnanf (-zero));
+ /* Infinite values. */
+ ASSERT (!isnanf (1.0f / 0.0f));
+ ASSERT (!isnanf (-1.0f / 0.0f));
+ /* Quiet NaN. */
+ ASSERT (isnanf (NaNf ()));
+#if defined FLT_EXPBIT0_WORD && defined FLT_EXPBIT0_BIT
+ /* Signalling NaN. */
+ {
+ #define NWORDS \
+ ((sizeof (float) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
+ typedef union { float value; unsigned int word[NWORDS]; } memory_float;
+ memory_float m;
+ m.value = NaNf ();
+# if FLT_EXPBIT0_BIT > 0
+ m.word[FLT_EXPBIT0_WORD] ^= (unsigned int) 1 << (FLT_EXPBIT0_BIT - 1);
+# else
+ m.word[FLT_EXPBIT0_WORD + (FLT_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
+ ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
+# endif
+ if (FLT_EXPBIT0_WORD < NWORDS / 2)
+ m.word[FLT_EXPBIT0_WORD + 1] |= (unsigned int) 1 << FLT_EXPBIT0_BIT;
+ else
+ m.word[0] |= (unsigned int) 1;
+ ASSERT (isnanf (m.value));
+ }
+#endif
+ return 0;
+}