X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-ldexpl.c;h=395c00fb09d663e0036f07dfe19dad675854a9e9;hb=2ce0c024d8f5f537b8c1b2509c615af1ea430537;hp=4740631c318bc28e19f812564e72472bbfdeaca5;hpb=57fdfd3f8ec62b105c53bcdf6f127c35c7fe7391;p=gnulib.git

diff --git a/tests/test-ldexpl.c b/tests/test-ldexpl.c
index 4740631c3..395c00fb0 100644
--- a/tests/test-ldexpl.c
+++ b/tests/test-ldexpl.c
@@ -1,5 +1,5 @@
 /* Test of multiplying a 'long double' by a power of 2.
-   Copyright (C) 2007 Free Software Foundation, Inc.
+   Copyright (C) 2007-2009 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
@@ -33,11 +33,28 @@
       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.
+   IRIX cc can't put -0.0L into .data, but can compute at runtime.
+   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
+static long double
+compute_minus_zero (void)
+{
+  return -LDBL_MIN * LDBL_MIN;
+}
+# define minus_zero compute_minus_zero ()
+#else
+long double minus_zero = -0.0L;
+#endif
+
 int
 main ()
 {
@@ -77,7 +94,7 @@ 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));