[src/gamma.c] Added a comment about an overflow case.

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@7499 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 3 insertions, 0 deletions

diff --git a/src/gamma.c b/src/gamma.c
index 2866555e4..c3543f3ff 100644
--- a/src/gamma.c
+++ b/src/gamma.c
@@ -191,6 +191,9 @@ mpfr_gamma (mpfr_ptr gamma, mpfr_srcptr x, mpfr_rnd_t rnd_mode)
             }
         }
       MPFR_SAVE_EXPO_FREE (expo);
+      /* Note: an overflow is possible with an infinite result;
+         in this case, the overflow flag will automatically be
+         restored by mpfr_check_range. */
       return mpfr_check_range (gamma, inex, rnd_mode);
     }