[exp.c] Fix bug when the input parameter is reused as output.

git-svn-id: svn://scm.gforge.inria.fr/svn/mpc/trunk@1329 211d60ee-9f03-0410-a15a-8952a2c7a4e4

1 files changed, 2 insertions, 1 deletions

diff --git a/src/exp.c b/src/exp.c
index 06faff3..f117a08 100644
--- a/src/exp.c
+++ b/src/exp.c
@@ -94,8 +94,9 @@ mpc_exp (mpc_ptr rop, mpc_srcptr op, mpc_rnd_t rnd)
 
       if (mpfr_inf_p (mpc_imagref (op)))
         {
+          int real_sign = mpfr_signbit (mpc_realref (op));
           inex_re = mpfr_set (mpc_realref (rop), n, MPFR_RNDN);
-          if (mpfr_signbit (mpc_realref (op)))
+          if (real_sign)
             inex_im = mpfr_set (mpc_imagref (rop), n, MPFR_RNDN);
           else
             {