Avoid integer overflow in MPFR_FAST_COMPUTE_IF_SMALL_INPUT.

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@4468 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 2 insertions, 1 deletions

diff --git a/atanh.c b/atanh.c
index d5715555c..7850e1007 100644
--- a/atanh.c
+++ b/atanh.c
@@ -72,7 +72,8 @@ mpfr_atanh (mpfr_ptr y, mpfr_srcptr xt , mp_rnd_t rnd_mode)
     }
 
   /* atanh(x) = x + x^3/3 + ... so the error is < 2^(3*EXP(x)-1) */
-  MPFR_FAST_COMPUTE_IF_SMALL_INPUT (y, xt, -2*MPFR_GET_EXP (xt)+1,1,rnd_mode,{});
+  MPFR_FAST_COMPUTE_IF_SMALL_INPUT (y, xt, -2 * MPFR_GET_EXP (xt), 1, 1,
+                                    rnd_mode, {});
 
   MPFR_SAVE_EXPO_MARK (expo);