Tests for module 'isnanl-nolibm'.

3 files changed, 92 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index af4c2d93d0..38f95959ae 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2007-02-24  Bruno Haible  <bruno@clisp.org>
 
+	* modules/isnanl-nolibm-tests: New file.
+	* tests/test-isnanl.c: New file.
+
 	* modules/isnanl-nolibm: New file.
 	* lib/isnanl.h: New file.
 	* lib/isnanl.c: New file.
diff --git a/modules/isnanl-nolibm-tests b/modules/isnanl-nolibm-tests
new file mode 100644
index 0000000000..e416d14a49
--- /dev/null
+++ b/modules/isnanl-nolibm-tests
@@ -0,0 +1,12 @@
+Files:
+tests/test-isnanl.c
+
+Depends-on:
+
+configure.ac:
+gl_LONG_DOUBLE_EXPONENT_LOCATION
+
+Makefile.am:
+TESTS += test-isnanl
+check_PROGRAMS += test-isnanl
+
diff --git a/tests/test-isnanl.c b/tests/test-isnanl.c
new file mode 100644
index 0000000000..534f15b177
--- /dev/null
+++ b/tests/test-isnanl.c
@@ -0,0 +1,77 @@
+/* Test of isnanl() substitute.
+   Copyright (C) 2007 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 2, 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, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#if HAVE_LONG_DOUBLE
+
+#include "isnanl.h"
+
+#include <limits.h>
+#include <stdlib.h>
+
+#define ASSERT(expr) if (!(expr)) abort ();
+
+int
+main ()
+{
+  /* Finite values.  */
+  ASSERT (!isnanl (3.141L));
+  ASSERT (!isnanl (3.141e30L));
+  ASSERT (!isnanl (3.141e-30L));
+  ASSERT (!isnanl (-2.718L));
+  ASSERT (!isnanl (-2.718e30L));
+  ASSERT (!isnanl (-2.718e-30L));
+  /* Infinite values.  */
+  ASSERT (!isnanl (1.0L / 0.0L));
+  ASSERT (!isnanl (-1.0L / 0.0L));
+  /* Quiet NaN.  */
+  ASSERT (isnanl (0.0L / 0.0L));
+#if defined LDBL_EXPBIT0_WORD && defined LDBL_EXPBIT0_BIT
+  /* Signalling NaN.  */
+  {
+    #define NWORDS \
+      ((sizeof (long double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
+    typedef union { long double value; unsigned int word[NWORDS]; }
+            memory_long_double;
+    memory_long_double m;
+    m.value = 0.0L / 0.0L;
+# if LDBL_EXPBIT0_BIT > 0
+    m.word[LDBL_EXPBIT0_WORD] ^= (unsigned int) 1 << (LDBL_EXPBIT0_BIT - 1);
+# else
+    m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
+      ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
+# endif
+    m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
+      |= (unsigned int) 1 << LDBL_EXPBIT0_BIT;
+    ASSERT (isnanl (m.value));
+  }
+#endif
+  return 0;
+}
+
+#else
+
+int
+main ()
+{
+  return 0;
+}
+
+#endif