X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-ldexpl.c;h=272fc4f0cf2c92691e17d4e3086075e808f7b15e;hb=6d65e7578f692b2d06574e25a848cef93b02ed25;hp=c4f35811ab64914d49a3842eaf1105a0fbe98248;hpb=5d7e7dd737c62fe09ce0d083810a502209dc5e80;p=gnulib.git

diff --git a/tests/test-ldexpl.c b/tests/test-ldexpl.c
index c4f35811a..272fc4f0c 100644
--- a/tests/test-ldexpl.c
+++ b/tests/test-ldexpl.c
@@ -1,10 +1,10 @@
 /* Test of multiplying a 'long double' by a power of 2.
-   Copyright (C) 2007 Free Software Foundation, Inc.
+   Copyright (C) 2007-2008 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   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.
+   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
@@ -12,8 +12,7 @@
    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.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
 
@@ -22,12 +21,33 @@
 #include <math.h>
 
 #include <float.h>
+#include <stdio.h>
 #include <stdlib.h>
 
 #include "fpucw.h"
 #include "isnanl-nolibm.h"
 
-#define ASSERT(expr) if (!(expr)) abort ();
+#define ASSERT(expr) \
+  do									     \
+    {									     \
+      if (!(expr))							     \
+        {								     \
+          fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
+          fflush (stderr);						     \
+          abort ();							     \
+        }								     \
+    }									     \
+  while (0)
+
+/* On HP-UX 10.20, negating 0.0L does not yield -0.0L.
+   So we use minus_zero instead.
+   Note that the expression -LDBL_MIN * LDBL_MIN does not work on other
+   platforms, such as when cross-compiling to PowerPC on MacOS X 10.5.  */
+#if defined __hpux || defined __sgi
+long double minus_zero = -LDBL_MIN * LDBL_MIN;
+#else
+long double minus_zero = -0.0L;
+#endif
 
 int
 main ()
@@ -68,7 +88,7 @@ main ()
   }
 
   { /* Negative zero.  */
-    x = -0.0L;
+    x = minus_zero;
     y = ldexpl (x, 0); ASSERT (y == x); ASSERT (signbit (x));
     y = ldexpl (x, 5); ASSERT (y == x); ASSERT (signbit (x));
     y = ldexpl (x, -5); ASSERT (y == x); ASSERT (signbit (x));