improved coverage

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@2694 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 6 insertions, 8 deletions

diff --git a/acosh.c b/acosh.c
index e349dfbaa..185b43236 100644
--- a/acosh.c
+++ b/acosh.c
@@ -37,19 +37,17 @@ mpfr_acosh (mpfr_ptr y, mpfr_srcptr x , mp_rnd_t rnd_mode)
   if (MPFR_UNLIKELY( MPFR_IS_SINGULAR(x) ))
     {
       /* Nan, or zero or -Inf */
-      if (MPFR_IS_NAN(x) || MPFR_IS_ZERO(x) || MPFR_IS_NEG(x) )
-	{
-	  MPFR_SET_NAN(y); 
-	  MPFR_RET_NAN;
-	}    
-      else if (MPFR_IS_INF(x))
+      if (MPFR_IS_INF(x) && MPFR_IS_POS(x))
 	{ 
 	  MPFR_SET_INF(y);
 	  MPFR_SET_POS(y);
 	  MPFR_RET(0);
 	}
-      else
-	MPFR_ASSERTN(0);
+      else /* Nan, or zero or -Inf */
+	{
+	  MPFR_SET_NAN(y); 
+	  MPFR_RET_NAN;
+	}    
     }
   comp = mpfr_cmp_ui (x, 1);
   if (MPFR_UNLIKELY( comp < 0 ))