fixed wrong inexact flag for a - b where a and b are of different signs

and EXP(a) < EXP(b)


git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@2032 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 1 insertions, 1 deletions

diff --git a/sub.c b/sub.c
index be98685cc..37689c65f 100644
--- a/sub.c
+++ b/sub.c
@@ -100,7 +100,7 @@ mpfr_sub (mpfr_ptr a, mpfr_srcptr b, mpfr_srcptr c, mp_rnd_t rnd_mode)
           inexact = mpfr_add1(a, c, b, rnd_mode,
                               (mp_exp_unsigned_t) MPFR_EXP(c) - MPFR_EXP(b));
           MPFR_CHANGE_SIGN(a);
-          return inexact;
+          return -inexact;
         }
       else
         {