From: Bruno Haible <bruno@clisp.org>
Date: Fri, 6 Apr 2007 20:20:46 +0000 (+0000)
Subject: Tests for module 'isnanf-nolibm'.
X-Git-Tag: cvs-readonly~567
X-Git-Url: http://erislabs.org.uk/gitweb/?a=commitdiff_plain;h=188ada9d1491cfcffd2311dcd3e18f6769de241e;p=gnulib.git

Tests for module 'isnanf-nolibm'.
---

diff --git a/ChangeLog b/ChangeLog
index b453f1e14..7a3f49732 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2007-04-06  Bruno Haible  <bruno@clisp.org>
 
+	* modules/isnanf-nolibm-tests: New file.
+	* tests/test-isnanf.c: New file.
+
 	* modules/isnanf-nolibm: New file.
 	* lib/isnanf.h: New file.
 	* lib/isnanf.c: New file.
diff --git a/modules/isnanf-nolibm-tests b/modules/isnanf-nolibm-tests
new file mode 100644
index 000000000..fa8b9c0ae
--- /dev/null
+++ b/modules/isnanf-nolibm-tests
@@ -0,0 +1,12 @@
+Files:
+tests/test-isnanf.c
+
+Depends-on:
+
+configure.ac:
+gl_FLOAT_EXPONENT_LOCATION
+
+Makefile.am:
+TESTS += test-isnanf
+check_PROGRAMS += test-isnanf
+
diff --git a/tests/test-isnanf.c b/tests/test-isnanf.c
new file mode 100644
index 000000000..0fafeade1
--- /dev/null
+++ b/tests/test-isnanf.c
@@ -0,0 +1,78 @@
+/* Test of isnanf() 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>
+
+#include "isnanf.h"
+
+#include <limits.h>
+#include <stdlib.h>
+
+#define ASSERT(expr) if (!(expr)) abort ();
+
+/* The Compaq (ex-DEC) C 6.4 compiler chokes on the expression 0.0 / 0.0.  */
+#ifdef __DECC
+static float
+NaN ()
+{
+  static float zero = 0.0f;
+  return zero / zero;
+}
+#else
+# define NaN() (0.0f / 0.0f)
+#endif
+
+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));
+  /* Infinite values.  */
+  ASSERT (!isnanf (1.0f / 0.0f));
+  ASSERT (!isnanf (-1.0f / 0.0f));
+  /* Quiet NaN.  */
+  ASSERT (isnanf (NaN ()));
+#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 = NaN ();
+# 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;
+}