X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-printf-frexp.c;h=fc3723f0f26f84e7d6d3638b0f63fe66fe1b38b6;hb=afd0e4d2fd87ba6eaddc04476ed6d808c3afc5b0;hp=9465c2009b320de4434ec8ed1d9b54e751ddfb75;hpb=973c0665ffa8d014c50b2c9b808d437c69fb5c50;p=gnulib.git

diff --git a/tests/test-printf-frexp.c b/tests/test-printf-frexp.c
index 9465c2009..fc3723f0f 100644
--- a/tests/test-printf-frexp.c
+++ b/tests/test-printf-frexp.c
@@ -1,10 +1,10 @@
 /* Test of splitting a double into fraction and mantissa.
    Copyright (C) 2007 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.  */
 
@@ -22,9 +21,19 @@
 #include "printf-frexp.h"
 
 #include <float.h>
+#include <stdio.h>
 #include <stdlib.h>
 
-#define ASSERT(expr) if (!(expr)) abort ();
+#define ASSERT(expr) \
+  do									     \
+    {									     \
+      if (!(expr))							     \
+        {								     \
+          fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
+          abort ();							     \
+        }								     \
+    }									     \
+  while (0)
 
 static double
 my_ldexp (double x, int d)
@@ -40,7 +49,12 @@ int
 main ()
 {
   int i;
-  double x;
+  /* The use of 'volatile' guarantees that excess precision bits are dropped
+     when dealing with denormalized numbers.  It is necessary on x86 systems
+     where double-floats are not IEEE compliant by default, to avoid that the
+     results become platform and compiler option dependent.  'volatile' is a
+     portable alternative to gcc's -ffloat-store option.  */
+  volatile double x;
 
   for (i = 1, x = 1.0; i <= DBL_MAX_EXP; i++, x *= 2.0)
     {