X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-frexpl.c;h=d4babb88c3c80378a57fbb281819f447f77c1632;hb=ce9012b94357c174a846d129fe9b5d556a0a3bf1;hp=f1446fe07d4663a6110847474372f3dcb1c42611;hpb=b16230b776af7cf76f75c483a7643786509b404f;p=gnulib.git

diff --git a/tests/test-frexpl.c b/tests/test-frexpl.c
index f1446fe07..d4babb88c 100644
--- a/tests/test-frexpl.c
+++ b/tests/test-frexpl.c
@@ -1,10 +1,10 @@
 /* Test of splitting a 'long double' into fraction and mantissa.
-   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
+   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.  */
 
@@ -27,6 +26,12 @@
 
 #include "fpucw.h"
 #include "isnanl-nolibm.h"
+#include "nan.h"
+
+/* Avoid some warnings from "gcc -Wshadow".
+   This file doesn't use the exp() function.  */
+#undef exp
+#define exp exponent
 
 #define ASSERT(expr) \
   do									     \
@@ -34,6 +39,7 @@
       if (!(expr))							     \
         {								     \
           fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
+          fflush (stderr);						     \
           abort ();							     \
         }								     \
     }									     \
@@ -52,6 +58,22 @@
 # define MIN_NORMAL_EXP LDBL_MIN_EXP
 #endif
 
+/* 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
+
 static long double
 my_ldexp (long double x, int d)
 {
@@ -74,7 +96,7 @@ main ()
   { /* NaN.  */
     int exp = -9999;
     long double mantissa;
-    x = 0.0L / 0.0L;
+    x = NaNl ();
     mantissa = frexpl (x, &exp);
     ASSERT (isnanl (mantissa));
   }
@@ -108,7 +130,7 @@ main ()
   { /* Negative zero.  */
     int exp = -9999;
     long double mantissa;
-    x = -0.0L;
+    x = minus_zero;
     mantissa = frexpl (x, &exp);
     ASSERT (exp == 0);
     ASSERT (mantissa == x);