update copyright for 2014 year bump

[gnulib.git] / tests / test-round-ieee.c

diff --git a/tests/test-round-ieee.c b/tests/test-round-ieee.c
index 0d5ad86..3f246ed 100644 (file)
--- a/tests/test-round-ieee.c
+++ b/tests/test-round-ieee.c
@@ -1,5 +1,5 @@
 /* Test of rounding to nearest, breaking ties away from zero.
-   Copyright (C) 2010 Free Software Foundation, Inc.
+   Copyright (C) 2010-2014 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
@@ -12,22 +12,43 @@
    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/>.  */
 
 #include <config.h>
 
 #include <math.h>
 
+#include "isnand-nolibm.h"
 #include "minus-zero.h"
+#include "infinity.h"
+#include "nan.h"
 #include "macros.h"
 
 int
 main ()
 {
+  /* See IEEE 754, section 6.3:
+       "the sign of the result of the round floating-point number to
+        integral value operation is the sign of the operand. These rules
+        shall apply even when operands or results are zero or infinite."  */
+
   /* Zero.  */
   ASSERT (!signbit (round (0.0)));
   ASSERT (!!signbit (round (minus_zerod)) == !!signbit (minus_zerod));
+  /* Positive numbers.  */
+  ASSERT (!signbit (round (0.3)));
+  ASSERT (!signbit (round (0.7)));
+  /* Negative numbers.  */
+  ASSERT (!!signbit (round (-0.3)) == !!signbit (minus_zerod));
+  ASSERT (!!signbit (round (-0.7)) == !!signbit (minus_zerod));
+
+  /* [MX] shaded specification in POSIX.  */
+
+  /* NaN.  */
+  ASSERT (isnand (round (NaNd ())));
+  /* Infinity.  */
+  ASSERT (round (Infinityd ()) == Infinityd ());
+  ASSERT (round (- Infinityd ()) == - Infinityd ());
 
   return 0;
 }