improved coverage test

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@2713 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 7 insertions, 1 deletions

diff --git a/next.c b/next.c
index d32337f03..ce230dafd 100644
--- a/next.c
+++ b/next.c
@@ -128,8 +128,14 @@ mpfr_nexttoward (mpfr_ptr x, mpfr_srcptr y)
 {
   int s;
 
-  if (MPFR_UNLIKELY(MPFR_IS_NAN(x) || MPFR_IS_NAN(y)))
+  if (MPFR_UNLIKELY(MPFR_IS_NAN(x)))
+    {
+      __gmpfr_flags |= MPFR_FLAGS_NAN;
+      return;
+    }
+  else if (MPFR_UNLIKELY(MPFR_IS_NAN(x) || MPFR_IS_NAN(y)))
     {
+      MPFR_SET_NAN(x);
       __gmpfr_flags |= MPFR_FLAGS_NAN;
       return;
     }