added check for +0 and -0

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@2053 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 15 insertions, 1 deletions

diff --git a/tests/tset_ld.c b/tests/tset_ld.c
index a6eeac6fe..6e62ca293 100644
--- a/tests/tset_ld.c
+++ b/tests/tset_ld.c
@@ -69,11 +69,25 @@ main (int argc, char *argv[])
 
   mpfr_init2 (x, 113);
 
+  /* check +0.0 and -0.0 */
+  d = 0.0;
+  check_set_get (d, x);
+  d = -0.0;
+  check_set_get (d, x);
+
+  /* checks that sign of -0.0 is set */
+  mpfr_set_ld (x, -0.0, GMP_RNDN);
+  if (MPFR_SIGN(x) > 0)
+    {
+      fprintf (stderr, "Error: sign of -0.0 is not set correctly\n");
+      exit (1);
+    }
+
   /* checks NaN, Inf and -Inf */
   mpfr_set_nan (x);
   d = mpfr_get_ld (x, GMP_RNDN);
   check_set_get (d, x);
-  
+
   mpfr_set_inf (x, 1);
   d = mpfr_get_ld (x, GMP_RNDN);
   check_set_get (d, x);