take also the target precision into account for the guard bits

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@774 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 1 insertions, 1 deletions

diff --git a/exp3.c b/exp3.c
index 483cb5194..f93111fc3 100644
--- a/exp3.c
+++ b/exp3.c
@@ -189,7 +189,7 @@ mp_rnd_t rnd_mode;
 		      ((double) (PREC(x)) / (double) BITS_PER_MP_LIMB)
 		      /log(2.0));  
   logn =  (int) ceil(log
-		      ((double) prec_x)
+		      ((double) prec_x+PREC(y))
 		      /log(2.0));  
   if (logn < 2) logn = 2;
   ttt = EXP(x);