X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-ceill.c;h=3d4c9e3e8980ecb3005a52a42d94afea17d4bee1;hb=66a0ae8baa37cf767dc21fbc429c0570d5d8d951;hp=5701246c21c71b59928caabaed584c096fbb8e93;hpb=e220635fc952c63b533873f2af39ec76aed4b4e3;p=gnulib.git

diff --git a/tests/test-ceill.c b/tests/test-ceill.c
index 5701246c2..3d4c9e3e8 100644
--- a/tests/test-ceill.c
+++ b/tests/test-ceill.c
@@ -1,5 +1,5 @@
 /* Test of rounding towards positive infinity.
-   Copyright (C) 2007-2008 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
@@ -20,11 +20,13 @@
 
 #include <math.h>
 
+#include <float.h>
 #include <stdio.h>
 #include <stdlib.h>
 
 #include "fpucw.h"
 #include "isnanl-nolibm.h"
+#include "nan.h"
 
 #define ASSERT(expr) \
   do									     \
@@ -38,6 +40,22 @@
     }									     \
   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 ()
 {
@@ -47,7 +65,7 @@ main ()
 
   /* Zero.  */
   ASSERT (ceill (0.0L) == 0.0L);
-  ASSERT (ceill (-0.0L) == 0.0L);
+  ASSERT (ceill (minus_zero) == 0.0L);
   /* Positive numbers.  */
   ASSERT (ceill (0.3L) == 1.0L);
   ASSERT (ceill (0.7L) == 1.0L);
@@ -73,7 +91,7 @@ main ()
   ASSERT (ceill (1.0L / 0.0L) == 1.0L / 0.0L);
   ASSERT (ceill (-1.0L / 0.0L) == -1.0L / 0.0L);
   /* NaNs.  */
-  ASSERT (isnanl (ceill (0.0L / 0.0L)));
+  ASSERT (isnanl (ceill (NaNl ())));
 
   return 0;
 }